Method and device for controlling common fan based on double condensing system

Abstract

The application relates to the technical field of condensing systems, and discloses a shared fan control method and device based on a double-condensing system, which comprises the following steps: obtaining a target condensing pressure parameter of the double-condensing system; determining a control parameter of a shared fan of the double-condensing system according to the target condensing pressure parameter of the double-condensing system; and controlling the shared fan according to the control parameter of the shared fan, so as to match the condensing pressures between a first condensing system and a second condensing system. It can be seen that the application can intelligently determine the control parameter of the shared fan according to the target condensing pressure parameter of the double-condensing system, and then control the shared fan according to the control parameter to adapt the condensing pressures of the double-condensing system, so that the situation that the condensing pressures of the double-condensing system are too different and the low / high pressure jump stop occurs is reduced, and the condensing pressure control reliability and accuracy of the double-condensing system are improved, thereby being beneficial to the normal operation of an industrial air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of condensing system, and particularly relates to a common fan control method and device based on a double-condensing system. BACKGROUND

[0002] In the field of industrial air conditioning, especially in the scene of needing to cope with low outdoor temperature environment (such as below 18℃) for refrigeration, the condensing system plays a crucial role. For computer room air conditioners and household air conditioners, the refrigeration system is usually relatively simple, that is, a single refrigeration system corresponds to one or more condensing fans. In this configuration, the condensing fan speeder can more easily adjust the speed of the fan according to a single condensing pressure signal to meet the refrigeration demand.

[0003] However, in the field of industrial air conditioning, since industrial air conditioners often need to handle larger refrigeration load, a double refrigeration system configuration is often adopted, and the two systems may share one or more condensing fans. This configuration improves the refrigeration efficiency, but also brings new challenges to the condensing fan control system.

[0004] Specifically, the double refrigeration system generates two different condensing pressures when working. In the design of the existing condensing fan speeder, the speed of the fan is usually adjusted according to the larger condensing pressure to prevent the condensing pressure from being too high. However, this approach has obvious problems in the scene of the double refrigeration system sharing the condensing fan: since the double refrigeration system is usually started at intervals, or the second system needs to be loaded when a single refrigeration system is running, it is inevitable that the condensing pressure of one system will be greater than that of the other. In addition, test data also shows that as the outdoor temperature decreases, the condensing pressure difference between the two refrigeration systems will become larger and larger, which will cause the system with lower condensing pressure to face the risk of low-pressure trip, thereby affecting the normal operation of the industrial air conditioner. It can be seen that it is particularly important to provide a method that can improve the control accuracy of the common fan of the double condensing system. SUMMARY

[0005] The present application provides a common fan control method and device based on a double-condensing system, which reduces the occurrence of a large difference in condensing pressure between the double-condensing system and low / high pressure trip, thereby improving the condensing pressure control reliability and accuracy of the double-condensing system, and thus facilitating the normal operation of the industrial air conditioner.

[0006] To solve the above technical problems, the present application discloses a common fan control method based on a double-condensing system, which comprises:

[0007] obtaining a target condensing pressure parameter of the double condensing system; the target condensing pressure parameter of the double condensing system comprises condensing pressure parameters of a first condensing system and a second condensing system;

[0008] determining a control parameter of a common fan of the double condensing system according to the target condensing pressure parameter of the double condensing system; the control parameter comprises at least one of a rotating speed control parameter, a wind direction control parameter, a wind temperature control parameter and a time control parameter;

[0009] controlling the common fan according to the control parameter of the common fan, so as to match the condensing pressure between the first condensing system and the second condensing system.

[0010] As an optional implementation, in the first aspect of the present application, the determining of the control parameter of the common fan of the double condensing system according to the target condensing pressure parameter of the double condensing system comprises:

[0011] determining a system parameter of the double condensing system and a device parameter of the common fan of the double condensing system; the system parameter comprises at least one of a system model parameter, a system location parameter and a system use condition, and the device parameter comprises at least one of a device model parameter, a device location parameter and a device use condition;

[0012] determining a target pressure threshold of the common fan according to the system parameter of the double condensing system and the device parameter of the common fan;

[0013] determining the control parameter of the common fan of the double condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the double condensing system.

[0014] As an optional implementation, in the first aspect of the present application, the target pressure threshold comprises a starting pressure threshold, a full-speed rotating pressure threshold and a pre-warning pressure threshold, the starting pressure threshold is less than the full-speed rotating pressure threshold, and the full-speed rotating pressure threshold is less than the pre-warning pressure threshold;

[0015] wherein the determining of the control parameter of the common fan of the double condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the double condensing system comprises:

[0016] judging whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the starting pressure threshold;

[0017] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the starting pressure threshold, a first target condensing system with the lowest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the dual condensing system is determined according to the condensing pressure parameter of the first target condensing system.

[0018] As an optional implementation, in the first aspect of the present application, the determination of the control parameter of the common fan of the dual condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the dual condensing system further comprises:

[0019] When it is judged that the condensing pressure parameters of only one condensing system of the first condensing system and the second condensing system are greater than or equal to the starting pressure threshold, the condensing system with the condensing pressure parameter greater than or equal to the starting pressure threshold is determined as a second target condensing system;

[0020] It is judged whether the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold;

[0021] When it is judged that the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold, the control parameter of the common fan of the dual condensing system is determined according to the condensing pressure parameter of the second target condensing system.

[0022] As an optional implementation, in the first aspect of the present application, the determination of the control parameter of the common fan of the dual condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the dual condensing system further comprises:

[0023] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the starting pressure threshold, it is judged whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the full-speed rotation pressure threshold;

[0024] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the full-speed rotation pressure threshold, or only one condensing system of the first condensing system and the second condensing system is greater than or equal to the full-speed rotation pressure threshold and less than the early warning pressure threshold, a third target condensing system with the lowest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the dual condensing system is determined according to the condensing pressure parameter of the third target condensing system.

[0025] As an optional implementation, in the first aspect of the present application, the determining the control parameter of the common fan of the dual-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the dual-condensing system further comprises:

[0026] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the full-speed rotation pressure threshold, a fourth target condensing system with the highest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the dual-condensing system is determined according to the condensing pressure parameter of the fourth target condensing system.

[0027] As an optional implementation, in the first aspect of the present application, the determining the control parameter of the common fan of the dual-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the dual-condensing system further comprises:

[0028] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the full-speed rotation pressure threshold, a fourth target condensing system with the highest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the dual-condensing system is determined according to the condensing pressure parameter of the fourth target condensing system.

[0029] The second aspect of the present application discloses a common fan control device based on a dual-condensing system, which comprises:

[0030] An acquisition module is configured to acquire a target condensing pressure parameter of the dual-condensing system; the target condensing pressure parameter of the dual-condensing system comprises condensing pressure parameters of a first condensing system and a second condensing system;

[0031] A determination module is configured to determine a control parameter of a common fan of the dual-condensing system according to the target condensing pressure parameter of the dual-condensing system; the control parameter comprises at least one of a rotation speed control parameter, a wind direction control parameter, a wind temperature control parameter, and a time control parameter;

[0032] A control module is configured to control the common fan according to the control parameter of the common fan, so as to match the condensing pressure between the first condensing system and the second condensing system.

[0033] As an optional implementation, in the second aspect of the present application, the determination module determines the control parameter of the common fan of the dual-condensing system according to the target condensing pressure parameter of the dual-condensing system in the following manner:

[0034] determine system parameters of the dual-condensing system and equipment parameters of the common fan of the dual-condensing system; the system parameters include at least one of system model parameters, system location parameters and system use conditions, and the equipment parameters include at least one of equipment model parameters, equipment location parameters and equipment use conditions;

[0035] determine a target pressure threshold of the common fan according to the system parameters of the dual-condensing system and the equipment parameters of the common fan;

[0036] determine a control parameter of the common fan of the dual-condensing system according to the target pressure threshold of the common fan and a target condensing pressure parameter of the dual-condensing system.

[0037] As an optional implementation, in the second aspect, the target pressure threshold includes a start pressure threshold, a full-speed rotation pressure threshold and a pre-warning pressure threshold, the start pressure threshold is less than the full-speed rotation pressure threshold, and the full-speed rotation pressure threshold is less than the pre-warning pressure threshold;

[0038] The determination module determines a control parameter of the common fan of the dual-condensing system according to the target pressure threshold of the common fan and a target condensing pressure parameter of the dual-condensing system.

[0039] determine whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the start pressure threshold;

[0040] When it is determined that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the start pressure threshold, determine a first target condensing system with the lowest condensing pressure parameter from the first condensing system and the second condensing system, and determine the control parameter of the common fan of the dual-condensing system according to the condensing pressure parameter of the first target condensing system.

[0041] As an optional implementation, in the second aspect, the determination module determines a control parameter of the common fan of the dual-condensing system according to the target pressure threshold of the common fan and a target condensing pressure parameter of the dual-condensing system.

[0042] When it is determined that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the start pressure threshold, determine a first target condensing system with the lowest condensing pressure parameter from the first condensing system and the second condensing system, and determine the control parameter of the common fan of the dual-condensing system according to the condensing pressure parameter of the first target condensing system.

[0043] determine whether the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold;

[0044] determining the control parameter of the common blower of the dual-condensing system according to the condensing pressure parameter of the second target condensing system when it is judged that the condensing pressure parameter of the second target condensing system is less than the full-speed switching pressure threshold.

[0045] As an optional implementation form, in the second aspect, the manner that the determining module determines the control parameter of the common blower of the dual-condensing system according to the target pressure threshold of the common blower and the target condensing pressure parameter of the dual-condensing system specifically comprises:

[0046] judging whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the full-speed switching pressure threshold when it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the starting pressure threshold;

[0047] determining a third target condensing system with the lowest condensing pressure parameter from the first condensing system and the second condensing system when it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the full-speed switching pressure threshold, or only one condensing system of the first condensing system and the second condensing system is greater than or equal to the full-speed switching pressure threshold and less than the early-warning pressure threshold, and determining the control parameter of the common blower of the dual-condensing system according to the condensing pressure parameter of the third target condensing system.

[0048] As an optional implementation form, in the second aspect, the manner that the determining module determines the control parameter of the common blower of the dual-condensing system according to the target pressure threshold of the common blower and the target condensing pressure parameter of the dual-condensing system specifically comprises:

[0049] determining a fourth target condensing system with the highest condensing pressure parameter from the first condensing system and the second condensing system when it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the full-speed switching pressure threshold, and determining the control parameter of the common blower of the dual-condensing system according to the condensing pressure parameter of the fourth target condensing system.

[0050] As an optional implementation form, in the second aspect, the manner that the determining module determines the control parameter of the common blower of the dual-condensing system according to the target pressure threshold of the common blower and the target condensing pressure parameter of the dual-condensing system specifically comprises:

[0051] judging whether there is at least one condensing system of the first condensing system and the second condensing system with a condensing pressure parameter greater than or equal to the early-warning pressure threshold.

[0052] When it is judged that the condensing pressure parameter of at least one of the first condensing system and the second condensing system is greater than or equal to the pre-warning pressure threshold, a fifth target condensing system with the highest condensing pressure parameter is determined from the first condensing system and the second condensing system, and a control parameter of a common fan of the double condensing system is determined according to the condensing pressure parameter of the fifth target condensing system.

[0053] The third aspect of the present application discloses another common fan control device based on a double condensing system, which comprises:

[0054] a memory storing executable program codes;

[0055] a processor coupled with the memory;

[0056] The processor invokes the executable program codes stored in the memory to execute the common fan control method based on a double condensing system disclosed in the first aspect of the present application.

[0057] The fourth aspect of the present application discloses a computer storage medium storing computer instructions, which are invoked to execute the common fan control method based on a double condensing system disclosed in the first aspect of the present application.

[0058] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0059] In the embodiments of the present application, a target condensing pressure parameter of a double condensing system is obtained, a control parameter of a common fan of the double condensing system is determined according to the target condensing pressure parameter of the double condensing system, and the common fan is controlled according to the control parameter to match the condensing pressures between the first condensing system and the second condensing system. It can be seen that the control parameter of the common fan can be intelligently determined according to the target condensing pressure parameter of the double condensing system, and then the common fan is controlled according to the control parameter to match the condensing pressures of the double condensing system. In this way, the situation that the condensing pressures of the double condensing system differ too much or the low / high pressure jump stop occurs is reduced, and the condensing pressure control reliability and accuracy of the double condensing system are improved, thereby facilitating the normal operation of the industrial air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0061] Figure 1 is a flow diagram of a common fan control method based on a double condensing system disclosed by an embodiment of the application;

[0062] Figure 2 is a flow diagram of another common fan control method based on a double condensing system disclosed by an embodiment of the application;

[0063] Figure 3 is a structural diagram of a common fan control device based on a double condensing system disclosed by an embodiment of the application;

[0064] Figure 4 is a structural diagram of another common fan control device based on a double condensing system disclosed by an embodiment of the application. DETAILED DESCRIPTION

[0065] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor fall within the scope of protection of the present application.

[0066] The terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product, or end including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product, or end.

[0067] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0068] The application discloses a common fan control method and device based on a double condensing system, which reduces the occurrence of large differences in condensing pressure and low / high pressure trip stop of the double condensing system, thereby improving the condensing pressure control reliability and accuracy of the double condensing system, and thus being conducive to the normal operation of an industrial air conditioner.

[0069] Embodiment one

[0070] Please refer to Figure 1 , Figure 1 is a flowchart of a shared fan control method based on a double-condensing system according to an embodiment of the present application. Wherein, Figure 1 The shared fan control method based on a double-condensing system described can be applied to large industrial air conditioning control scenarios, commercial building central air conditioning control scenarios, air conditioning control scenarios in the refrigeration / cold storage industry, etc., and the embodiments of the present application are not limited. Optionally, the method can be implemented by a shared fan control device, which can be integrated in a shared fan of a double-condensing system, or a local server or cloud server for processing the control process of the shared fan of the double-condensing system, etc., and the embodiments of the present application are not limited. As Figure 1 shown, the shared fan control method based on a double-condensing system can include the following operations:

[0071] 101, obtaining a target condensing pressure parameter of a double-condensing system.

[0072] In the embodiments of the present application, wherein the target condensing pressure parameter of the double-condensing system includes the condensing pressure parameters of the first condensing system and the second condensing system, which can be obtained by the first condensing pressure sensor of the first condensing system and the second condensing pressure sensor of the second condensing system.

[0073] Further, the fault early warning and diagnosis function can be integrated, the running state of the double-condensing system, the condensing pressure parameter and the control parameter of the shared fan thereof are monitored and analyzed in real time, potential fault signs are found in time, and corresponding warning or diagnosis information is given, which helps the operation and maintenance personnel to take measures in time, reduces the occurrence or expansion of faults, and improves the operation and maintenance efficiency of the double-condensing system and the shared fan.

[0074] 102, determining a control parameter of a shared fan of a double-condensing system according to a target condensing pressure parameter of the double-condensing system.

[0075] In the embodiments of the present application, the shared fan can be one or more. Optionally, the control parameter of the shared fan includes at least one of a speed control parameter, a wind direction control parameter, a wind temperature control parameter and a time control parameter.

[0076] For example, after the two condensing pressure sensors of the double-condensing system measure the condensing pressure parameters Pc1 and Pc2 of the two condensing systems, they can be transmitted to the shared fan control device, and the shared fan control device compares the sizes of Pc1 and Pc2, and then determines the control parameter of the shared fan according to the comparison result to adjust the condensing pressure of the corresponding condensing system.

[0077] 103. Controlling the common fan according to the control parameter of the common fan to match the condensing pressures between the first condensing system and the second condensing system.

[0078] In the embodiment of the present application, matching the condensing pressures between the first condensing system and the second condensing system means that the condensing pressures of the two condensing systems are equal or the difference between the condensing pressures of the two condensing systems is reduced to a preset pressure difference threshold.

[0079] It can be seen that, by implementing the embodiment of the present application, the control parameter of the common fan can be intelligently determined according to the target condensing pressure parameter of the double condensing system, and then the common fan is controlled according to the control parameter to match the condensing pressures of the double condensing system, so that the situation that the condensing pressures of the double condensing system are too different or the low / high pressure jump stop occurs is reduced, and the control reliability and accuracy of the condensing pressures of the double condensing system are improved, thereby facilitating the normal operation of the industrial air conditioner.

[0080] In an optional embodiment, the step 102 of determining the control parameter of the common fan of the double condensing system according to the target condensing pressure parameter of the double condensing system comprises:

[0081] determining the system parameter of the double condensing system and the equipment parameter of the common fan of the double condensing system;

[0082] determining the target pressure threshold of the common fan according to the system parameter of the double condensing system and the equipment parameter of the common fan;

[0083] determining the control parameter of the common fan of the double condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the double condensing system.

[0084] In the optional embodiment, optionally, the system parameter comprises at least one of a system model parameter, a system location parameter, and a system usage (such as a historical usage, an energy consumption, etc.). Further optionally, the equipment parameter comprises at least one of an equipment model parameter, an equipment location parameter, and an equipment usage (such as a historical usage, an energy consumption, etc.).

[0085] Further, the target pressure threshold (which can be set in advance in the common fan control device or determined in real time according to the system parameter of the double condensing system and the equipment parameter of the common fan) comprises a start-up pressure threshold P1, a full-speed rotation pressure threshold P2, and a warning pressure threshold P3, wherein the start-up pressure threshold is less than the full-speed rotation pressure threshold, and the full-speed rotation pressure threshold is less than the warning pressure threshold, i.e., P1

[0086] Further, the environment parameters of the environment where the double condensing system is located can be acquired, such as temperature parameters, humidity parameters, pressure parameters, air density parameters, altitude parameters, and the like, and then the target pressure threshold of the shared fan is determined according to the system parameters of the double condensing system and the equipment parameters of the shared fan, and in combination with the environment parameters.

[0087] It can be seen that the optional embodiment can determine the target pressure threshold of the shared fan according to the system parameters of the double condensing system and the equipment parameters of the shared fan, and then compare the target pressure threshold of the shared fan with the target condensing pressure parameters of the double condensing system, so as to determine the control parameters of the shared fan according to the comparison result. In this way, the determination reliability and accuracy of the control parameters of the shared fan can be improved, and the wear, fatigue, overheating and overpressure of the double condensing system and the shared fan can be reduced, so as to improve the operation stability and efficiency of the double condensing system, and improve the user experience.

[0088] In another optional embodiment, the step 102 of determining the control parameters of the shared fan of the double condensing system according to the target pressure threshold of the shared fan and the target condensing pressure parameters of the double condensing system comprises:

[0089] determining whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the start-up pressure threshold;

[0090] When it is determined that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the start-up pressure threshold, the first target condensing system with the lowest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameters of the shared fan of the double condensing system are determined according to the condensing pressure parameter of the first target condensing system.

[0091] In this optional embodiment, for example, when it is determined that the condensing pressure parameter Pc1 of the first condensing system is less than the condensing pressure parameter Pc2 of the second condensing system, and both are less than the start-up pressure threshold P1 of the shared fan, it indicates that the condensing pressure parameters of the two condensing systems do not reach the start-up pressure threshold of the shared fan. At this time, Pc1 can be transmitted to the shared fan control device, and the control parameters of the shared fan are determined by the shared fan control device.

[0092] It can be seen that the optional embodiment can determine the control parameters of the shared fan according to the comparison result between the start-up pressure threshold of the shared fan and the target condensing pressure parameters of the double condensing system. In this way, timely and accurate response can be made based on the actual change of the condensing pressure, which is conducive to improving the operation adaptability and flexibility of the double condensing system, and thus is conducive to improving the overall performance and operation efficiency of the double condensing system.

[0093] In yet another optional embodiment, the step 102 of determining the control parameter of the common fan of the dual-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the dual-condensing system further comprises:

[0094] When it is judged that the condensing pressure parameter of only one condensing system in the first condensing system and the second condensing system is greater than or equal to the starting pressure threshold, the condensing system with the condensing pressure parameter greater than or equal to the starting pressure threshold is determined as the second target condensing system;

[0095] It is judged whether the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold;

[0096] When it is judged that the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold, the control parameter of the common fan of the dual-condensing system is determined according to the condensing pressure parameter of the second target condensing system.

[0097] In this optional embodiment, for example, when it is judged that the condensing pressure parameter of the first condensing system Pci < the starting pressure threshold of the common fan P1 < the condensing pressure parameter of the second condensing system Pc2 < the full-speed rotation pressure threshold of the common fan P2, that is, the condensing pressure parameter of the condensing system with high condensing pressure has reached the starting pressure threshold of the common fan, at this time, Pc2 can be transmitted to the common fan control device, and the control parameter of the common fan is determined by the common fan control device to depressurize the condensing system with high condensing pressure.

[0098] It can be seen that the optional embodiment can determine the control parameter of the common fan according to the comparison result between the full-speed rotation pressure threshold of the common fan and the target condensing pressure parameter of the dual-condensing system, so that the system can be depressurized when only one condensing system reaches the starting pressure threshold, thereby improving the operation accuracy and stability of the dual-condensing system, and improving the overall energy efficiency of the dual-condensing system to determine the normal operation of the dual-condensing system.

[0099] In yet another optional embodiment, the step 102 of determining the control parameter of the common fan of the dual-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the dual-condensing system further comprises:

[0100] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the starting pressure threshold, it is judged whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the full-speed rotation pressure threshold;

[0101] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the full-speed rotation pressure threshold, or only one of the first condensing system and the second condensing system is greater than or equal to the full-speed rotation pressure threshold and less than the early warning pressure threshold, a third target condensing system with the lowest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the double-condensing system is determined according to the condensing pressure parameter of the third target condensing system.

[0102] In this optional embodiment, for example, when it is judged that the start-up pressure threshold P1 of the common fan is less than the condensing pressure parameter Pc1 of the first condensing system, which is less than the condensing pressure parameter Pc2 of the second condensing system, which is less than the full-speed rotation pressure threshold P2 of the common fan, or the start-up pressure threshold P1 of the common fan is less than the condensing pressure parameter Pc1 of the first condensing system, which is less than the full-speed rotation pressure threshold P2 of the common fan, which is less than the condensing pressure parameter Pc2 of the second condensing system, which is less than the early warning pressure threshold P3, that is, the condensing pressure parameters of the two condensing systems all reach the start-up pressure threshold of the common fan, and the condensing system with high condensing pressure has no high-pressure trip risk, at this time, Pc1 can be transmitted to the common fan control device, and the control parameter of the common fan is determined by the common fan control device to prevent the condensing system with low condensing pressure from being further reduced in pressure.

[0103] It can be seen that the optional embodiment can determine the control parameter of the common fan according to the comparison result between the full-speed rotation pressure threshold and the early warning pressure threshold of the common fan and the target condensing pressure parameter of the double-condensing system, which can effectively reduce the situation of further reducing the condensing pressure of the condensing system with low condensing pressure, improve the operation stability of the double-condensing system, optimize the energy use of the large air conditioner control scene, and ensure that the double-condensing system can operate efficiently and safely under different condensing pressures.

[0104] In still another optional embodiment, the step 102 of determining the control parameter of the common fan of the double-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the double-condensing system further comprises:

[0105] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the full-speed rotation pressure threshold, a fourth target condensing system with the highest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the double-condensing system is determined according to the condensing pressure parameter of the fourth target condensing system.

[0106] In the optional embodiment, for example, when it is judged that the full-speed rotation pressure threshold P2 of the common fan is less than the condensing pressure parameter Pc1 of the first condensing system and the condensing pressure parameter Pc2 of the second condensing system, that is, the condensing pressure parameters of the two condensing systems reach the full-speed rotation pressure threshold of the common fan, and the condensing system with low condensing pressure will not appear the situation of increasingly low pressure, at this time, Pc2 can be transmitted to the common fan control device, and the control parameter of the common fan is determined by the common fan control device to dissipate heat for the condensing system with high condensing pressure.

[0107] It can be seen that the optional embodiment can determine the control parameter of the common fan according to the comparison result between the full-speed rotation pressure threshold of the common fan and the target condensing pressure parameter of the double condensing system, to dissipate heat for the condensing system with high condensing pressure. In this way, when the condensing pressures of the two condensing systems reach or exceed the full-speed rotation pressure threshold, the situation of overheat of the condensing system can be reduced, and the control reliability and accuracy of the common fan can be improved, so that the situation of damage of the device can be reduced.

[0108] Embodiment two

[0109] Please refer to Figure 2 , Figure 2 is another flow diagram of the method for controlling the common fan based on the double condensing system according to an embodiment of the present application. Wherein, Figure 2 The method for controlling the common fan based on the double condensing system described can be applied to large industrial air conditioning control scenes, commercial building central air conditioning control scenes, air conditioning control scenes in the refrigeration / cold storage industry, etc., and the embodiment of the present application is not limited. Optionally, the method can be realized by a common fan control device, which can be integrated in the common fan of the double condensing system, or a local server or a cloud server for processing the control process of the common fan of the double condensing system, etc., and the embodiment of the present application is not limited. As Figure 2 shown, the method for controlling the common fan based on the double condensing system can include the following operations:

[0110] 201, obtaining a target condensing pressure parameter of a double condensing system.

[0111] 202, judging whether the condensing pressure parameter of at least one condensing system in the first condensing system and the second condensing system is greater than or equal to a warning pressure threshold.

[0112] 203. When it is determined that the condensing pressure parameter of at least one of the first and second condensing systems is greater than or equal to the warning pressure threshold, the fifth target condensing system with the highest condensing pressure parameter is identified from the first and second condensing systems, and the control parameters of the common fan of the dual condensing systems are determined based on the condensing pressure parameter of the fifth target condensing system.

[0113] In an embodiment of the present invention, for example, if it is determined that the condensing pressure parameter Pc1 of the first condensing system is less than the warning pressure threshold P3 of the shared fan and less than the condensing pressure parameter Pc2 of the second condensing system, or the warning pressure threshold P3 of the shared fan is less than the condensing pressure parameter Pc1 of the first condensing system and less than the condensing pressure parameter Pc2 of the second condensing system, it indicates that the condensing system with high condensing pressure may be at risk of high-pressure tripping. At this time, Pc2 can be transmitted to the shared fan control device, and the shared fan control device can determine the control parameters of the shared fan to reduce the pressure of the condensing system with high condensing pressure and reduce the occurrence of high-pressure tripping.

[0114] 204. Control the shared fan according to the control parameters of the shared fan to match the condensing pressure between the first condensing system and the second condensing system.

[0115] In this embodiment of the invention, for other descriptions of steps 201 and 204, please refer to the detailed description of steps 101 and 103 in Embodiment 1. These descriptions will not be repeated in this embodiment of the invention.

[0116] As can be seen, by implementing the embodiments of the present invention, the control parameters of the shared fan can be determined based on the comparison between the full-speed rotation pressure threshold of the shared fan and the target condensing pressure parameter of the dual condensing system, so as to reduce the pressure of the condensing system with high condensing pressure. In this way, when the condensing pressure of at least one condensing system exceeds the warning pressure threshold, the shared fan control device can quickly identify the condensing system with excessively high condensing pressure, thereby reducing the risk of high-pressure tripping of the condensing system and further improving the operational stability of the dual condensing system.

[0117] Example 3

[0118] Please see Figure 3 , Figure 3 This is a schematic diagram of a shared fan control device based on a dual-condensing system disclosed in an embodiment of the present invention. Figure 3 As shown, the shared fan control device based on the dual condenser system may include:

[0119] The acquisition module 301 is used to acquire the target condensing pressure parameters of the dual condensing system;

[0120] The determining module 302 is configured to determine the control parameter of the common fan of the double-condensing system according to the target condensing pressure parameter of the double-condensing system.

[0121] The control module 303 is configured to control the common fan according to the control parameter of the common fan, so as to match the condensing pressures between the first condensing system and the second condensing system.

[0122] In the embodiments of the present application, the target condensing pressure parameter of the double-condensing system includes the condensing pressure parameters of the first condensing system and the second condensing system; and the control parameter includes at least one of the rotation speed control parameter, the wind direction control parameter, the wind temperature control parameter and the time control parameter.

[0123] It can be seen that, in the embodiments of the present application, Figure 3 The common fan control device based on the double-condensing system described above can intelligently determine the control parameter of the common fan according to the target condensing pressure parameter of the double-condensing system, and then control the common fan according to the control parameter to match the condensing pressures of the double-condensing system. In this way, the situation that the condensing pressures of the double-condensing system differ too much or the low / high pressure jump stop occurs is reduced, and the condensing pressure control reliability and accuracy of the double-condensing system are improved, thereby facilitating the normal operation of the industrial air conditioner.

[0124] In an optional embodiment, the determining module 302 determines the control parameter of the common fan of the double-condensing system according to the target condensing pressure parameter of the double-condensing system in the following manner:

[0125] determining the system parameter of the double-condensing system and the equipment parameter of the common fan of the double-condensing system;

[0126] determining the target pressure threshold of the common fan according to the system parameter of the double-condensing system and the equipment parameter of the common fan;

[0127] determining the control parameter of the common fan of the double-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the double-condensing system.

[0128] In this optional embodiment, the system parameter includes at least one of a system model parameter, a system location parameter and a system use condition, and the equipment parameter includes at least one of an equipment model parameter, an equipment location parameter and an equipment use condition.

[0129] In this optional embodiment, the target pressure threshold includes an start-up pressure threshold, a full-speed rotation pressure threshold and a pre-warning pressure threshold, the start-up pressure threshold is less than the full-speed rotation pressure threshold, and the full-speed rotation pressure threshold is less than the pre-warning pressure threshold.

[0130] It can be seen that, in the embodiments of the present application, Figure 3The described common fan control device based on the double-condensing system can determine the target pressure threshold of the common fan according to the system parameters of the double-condensing system and the equipment parameters of the common fan, then compare the target pressure threshold of the common fan with the target condensing pressure parameter of the double-condensing system, and determine the control parameter of the common fan according to the comparison result. In this way, the determination reliability and accuracy of the control parameter of the common fan can be improved, and the wear, fatigue, overheating and overpressure of the double-condensing system and the common fan can be reduced, thereby the operation stability and efficiency of the double-condensing system can be improved to enhance the user experience.

[0131] In another optional embodiment, the determination module 302 determines the control parameter of the common fan of the double-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the double-condensing system in the following manner:

[0132] determining whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the start-up pressure threshold;

[0133] when it is determined that the condensing pressure parameters of the first condensing system and the second condensing system are both less than the start-up pressure threshold, determining the first target condensing system with the lowest condensing pressure parameter from the first condensing system and the second condensing system, and determining the control parameter of the common fan of the double-condensing system according to the condensing pressure parameter of the first target condensing system.

[0134] It can be seen that the implementation Figure 3 The described common fan control device based on the double-condensing system can determine the control parameter of the common fan according to the comparison result between the start-up pressure threshold of the common fan and the target condensing pressure parameter of the double-condensing system. In this way, timely and accurate responses can be made based on the actual changes of the condensing pressure, thereby helping to improve the operation adaptability and flexibility of the double-condensing system, and thus helping to improve the overall performance and operation efficiency of the double-condensing system.

[0135] In yet another optional embodiment, the determination module 302 determines the control parameter of the common fan of the double-condensing system according to the target pressure threshold of the common fan and the target condensing pressure parameter of the double-condensing system in the following manner:

[0136] when it is determined that only one condensing system in the first condensing system and the second condensing system has a condensing pressure parameter greater than or equal to the start-up pressure threshold, determining the condensing system with the condensing pressure parameter greater than or equal to the start-up pressure threshold as the second target condensing system;

[0137] determining whether the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold;

[0138] When it is judged that the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold value, the control parameter of the common fan of the double-condensing system is determined according to the condensing pressure parameter of the second target condensing system.

[0139] It can be seen that, in the implementation Figure 3 The described common fan control device based on the double-condensing system can determine the control parameter of the common fan according to the comparison result between the full-speed rotation pressure threshold value of the common fan and the target condensing pressure parameter of the double-condensing system, so that the condensing system with only one condensing system reaching the starting pressure threshold value can be specifically reduced in pressure, thereby improving the operation accuracy and stability of the double-condensing system, and improving the overall energy efficiency of the double-condensing system to determine the normal operation of the double-condensing system.

[0140] In another optional embodiment, the determination module 302 determines the control parameter of the common fan of the double-condensing system according to the target pressure threshold value of the common fan and the target condensing pressure parameter of the double-condensing system, and the specific determination manner further includes:

[0141] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are greater than or equal to the starting pressure threshold value, it is judged whether the condensing pressure parameters of the first condensing system and the second condensing system are less than the full-speed rotation pressure threshold value;

[0142] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are less than the full-speed rotation pressure threshold value, or only one condensing system in the first condensing system and the second condensing system is greater than or equal to the full-speed rotation pressure threshold value and less than the early warning pressure threshold value, a third target condensing system with the lowest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the double-condensing system is determined according to the condensing pressure parameter of the third target condensing system.

[0143] It can be seen that, in the implementation Figure 3 The described common fan control device based on the double-condensing system can determine the control parameter of the common fan according to the comparison result between the full-speed rotation pressure threshold value of the common fan and the target condensing pressure parameter of the double-condensing system, so that the condensing system with only one condensing system reaching the starting pressure threshold value can be specifically reduced in pressure, thereby improving the operation accuracy and stability of the double-condensing system, and improving the overall energy efficiency of the double-condensing system to determine the normal operation of the double-condensing system.

[0144] In another optional embodiment, the determination module 302 determines the control parameter of the common fan of the double-condensing system according to the target pressure threshold value of the common fan and the target condensing pressure parameter of the double-condensing system, and the specific determination manner further includes:

[0145] When it is judged that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the full-speed rotation pressure threshold value, a fourth target condensing system with the highest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the double-condensing system is determined according to the condensing pressure parameter of the fourth target condensing system.

[0146] It can be seen that, in the implementation Figure 3 The described common fan control device based on the double-condensing system can determine the control parameter of the common fan according to the comparison result between the full-speed rotation pressure threshold value of the common fan and the target condensing pressure parameter of the double-condensing system, so as to dissipate heat for the condensing system with high condensing pressure. In this way, when the condensing pressures of the two condensing systems both reach or exceed the full-speed rotation pressure threshold value, the situation of overheat of the condensing system can be reduced, and thus the control reliability and accuracy of the common fan can be improved, so that the situation of damage of the device can be reduced.

[0147] In another optional embodiment, the determination module 302 determines the control parameter of the common fan of the double-condensing system according to the target pressure threshold value of the common fan and the target condensing pressure parameter of the double-condensing system, and the determination manner specifically includes:

[0148] judging whether there is at least one condensing system in the first condensing system and the second condensing system whose condensing pressure parameter is greater than or equal to the early warning pressure threshold value;

[0149] When it is judged that there is at least one condensing system in the first condensing system and the second condensing system whose condensing pressure parameter is greater than or equal to the early warning pressure threshold value, a fifth target condensing system with the highest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameter of the common fan of the double-condensing system is determined according to the condensing pressure parameter of the fifth target condensing system.

[0150] It can be seen that, in the implementation Figure 4 The described common fan control device based on the double-condensing system can determine the control parameter of the common fan according to the comparison result between the full-speed rotation pressure threshold value of the common fan and the target condensing pressure parameter of the double-condensing system, so as to reduce the pressure of the condensing system with high condensing pressure. In this way, when the condensing pressure of at least one condensing system exceeds the early warning pressure threshold value, the common fan control device can quickly identify the condensing system with excessively high condensing pressure, and thus the risk of high-pressure trip of the condensing system can be reduced, so that the operation stability of the double-condensing system can be further improved.

[0151] Embodiment Four

[0152] Please refer to Figure 4 , Figure 4is another structure schematic view of the shared fan control device based on the double condensing system disclosed by the embodiment of the present application. As shown in ​ The shared fan control device based on the double condensing system can include:

[0153] The memory 401 stores executable program codes.

[0154] The processor 402 is coupled with the memory 401.

[0155] The processor 402 invokes the executable program codes stored in the memory 401 to execute the steps of the shared fan control method based on the double condensing system described in the embodiment one or the embodiment two of the present application.

[0156] Embodiment five

[0157] The embodiment of the present application discloses a computer storage medium, which stores computer instructions, and the computer instructions are used to execute the steps of the shared fan control method based on the double condensing system described in the embodiment one or the embodiment two of the present application when being invoked.

[0158] Embodiment six

[0159] The embodiment of the present application discloses a computer program product, which includes a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to make a computer execute the steps of the shared fan control method based on the double condensing system described in the embodiment one or the embodiment two.

[0160] The above described device embodiments are only schematic, wherein the modules illustrated as separate components can or can not be physically separate, and the components illustrated as modules can or can not be physical modules, i.e., can be located in one place, or can be distributed on multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment scheme. Those skilled in the art can understand and implement without creative labor.

[0161] Those skilled in the art can clearly understand the implementation of the various embodiments by means of software and necessary general hardware platforms through the above specific description of the embodiments, and of course, the embodiments can also be implemented by hardware. Based on such understanding, the above technical solutions, essentially or in terms of contribution to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, which includes a Read-Only Memory (ROM), a Random Access Memory (RAM), a Programmable Read-only Memory (PROM), an Erasable Programmable Read Only Memory (EPROM), a One-time Programmable Read-Only Memory (OTPROM), an Electrically-Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM), or other optical disk storage, a magnetic disk storage, a magnetic tape storage, or any other medium that can be used to carry or store data in a computer readable manner.

[0162] Finally, it should be noted that: the disclosed control method and device for a common fan based on a double-condensing system is only a preferred embodiment of the present application, and is used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A shared fan control method based on a dual-condensing system, characterized in that, The method includes: Obtain the target condensing pressure parameters of the dual condensing system; the target condensing pressure parameters of the dual condensing system include the condensing pressure parameters of the first condensing system and the second condensing system. Determine the system parameters of the dual condensing system and the equipment parameters of the common fan of the dual condensing system; the system parameters include at least one of system model parameters, system location parameters, and system usage status, and the equipment parameters include at least one of equipment model parameters, equipment location parameters, and equipment usage status; Based on the system parameters of the dual condensing system and the equipment parameters of the shared fan, the target pressure threshold of the shared fan is determined. Based on the target pressure threshold of the shared fan and the target condensing pressure parameters of the dual condensing system, the control parameters of the shared fan of the dual condensing system are determined; the control parameters include at least one of the following: speed control parameters, air direction control parameters, air temperature control parameters, and time control parameters. The shared fan is controlled according to the control parameters of the shared fan so that the condensing pressure between the first condensing system and the second condensing system is matched. The target pressure threshold includes a start-up pressure threshold, a full-speed rotation pressure threshold, and a warning pressure threshold. The start-up pressure threshold is less than the full-speed rotation pressure threshold, and the full-speed rotation pressure threshold is less than the warning pressure threshold. The step of determining the control parameters of the common fan of the dual condensing system based on the target pressure threshold of the common fan and the target condensing pressure parameters of the dual condensing system includes: Determine whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the starting pressure threshold. When it is determined that the condensing pressure parameters of both the first condensing system and the second condensing system are less than the starting pressure threshold, the first target condensing system with the lowest condensing pressure parameter is identified from the first condensing system and the second condensing system, and the control parameters of the common fan of the dual condensing system are determined based on the condensing pressure parameter of the first target condensing system.

2. The shared fan control method based on a dual-condensing system according to claim 1, characterized in that, The step of determining the control parameters of the common fan of the dual condensing system based on the target pressure threshold of the common fan and the target condensing pressure parameters of the dual condensing system further includes: When it is determined that only one of the first condensing system and the second condensing system has a condensing pressure parameter greater than or equal to the starting pressure threshold, the condensing system with the condensing pressure parameter greater than or equal to the starting pressure threshold is identified as the second target condensing system. Determine whether the condensation pressure parameter of the second target condensation system is less than the full-speed rotation pressure threshold; When it is determined that the condensing pressure parameter of the second target condensing system is less than the full-speed rotation pressure threshold, the control parameters of the common fan of the dual condensing system are determined based on the condensing pressure parameter of the second target condensing system.

3. The shared fan control method based on a dual-condensing system according to claim 2, characterized in that, The step of determining the control parameters of the common fan of the dual condensing system based on the target pressure threshold of the common fan and the target condensing pressure parameters of the dual condensing system further includes: When it is determined that the condensing pressure parameters of the first condensing system and the second condensing system are both greater than or equal to the starting pressure threshold, it is determined whether the condensing pressure parameters of the first condensing system and the second condensing system are both less than the full-speed rotation pressure threshold. When it is determined that the condensing pressure parameters of both the first condensing system and the second condensing system are less than the full-speed rotation pressure threshold, or when only one of the first condensing system and the second condensing system is greater than or equal to the full-speed rotation pressure threshold and less than the warning pressure threshold, a third target condensing system with the lowest condensing pressure parameter is determined from the first condensing system and the second condensing system, and the control parameters of the common fan of the dual condensing system are determined based on the condensing pressure parameter of the third target condensing system.

4. The shared fan control method based on a dual-condensing system according to claim 3, characterized in that, The step of determining the control parameters of the common fan of the dual condensing system based on the target pressure threshold of the common fan and the target condensing pressure parameters of the dual condensing system further includes: When it is determined that the condensing pressure parameters of both the first condensing system and the second condensing system are greater than or equal to the full-speed rotation pressure threshold, the fourth target condensing system with the highest condensing pressure parameter is identified from the first condensing system and the second condensing system, and the control parameters of the common fan of the dual condensing system are determined based on the condensing pressure parameter of the fourth target condensing system.

5. The shared fan control method based on a dual-condensing system according to claim 1, characterized in that, The step of determining the control parameters of the common fan of the dual condensing system based on the target pressure threshold of the common fan and the target condensing pressure parameters of the dual condensing system includes: Determine whether there is a condensing pressure parameter of at least one condensing system in the first condensing system and the second condensing system that is greater than or equal to the warning pressure threshold. When it is determined that the condensing pressure parameter of at least one of the first condensing system and the second condensing system is greater than or equal to the warning pressure threshold, the fifth target condensing system with the highest condensing pressure parameter is identified from the first condensing system and the second condensing system, and the control parameters of the common fan of the dual condensing system are determined based on the condensing pressure parameter of the fifth target condensing system.

6. A shared fan control device based on a dual-condensing system, characterized in that, The device is used to perform the shared fan control method based on a dual-condensing system as described in any one of claims 1-5, and the device comprises: The acquisition module is used to acquire the target condensing pressure parameters of the dual condensing system; the target condensing pressure parameters of the dual condensing system include the condensing pressure parameters of the first condensing system and the second condensing system. The determining module is used to determine the control parameters of the common fan of the dual condensing system based on the target condensing pressure parameters of the dual condensing system; the control parameters include at least one of speed control parameters, air direction control parameters, air temperature control parameters, and time control parameters; The control module is used to control the shared fan according to the control parameters of the shared fan, so as to match the condensing pressure between the first condensing system and the second condensing system.

7. A shared fan control device based on a dual-condensing system, characterized in that, The device includes: Memory containing executable program code; A processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the shared fan control method based on a dual condensing system as described in any one of claims 1-5.

8. A computer storage medium, characterized in that, The computer storage medium stores computer instructions, which, when invoked, are used to execute the shared fan control method based on a dual-condensing system as described in any one of claims 1-5.

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