A start-up control method and related device for a chiller unit

Abstract

This application provides a chiller unit startup control method and related apparatus. The chiller unit startup control method can be applied to a controller in a chilled water system where the chiller unit is located. After the controller shuts down the chiller unit, if the actual water supply temperature is not greater than the chiller unit's startup water supply setpoint, the controller increases the startup water supply setpoint and, based on the increased setpoint, controls the chiller unit to restart. By adjusting the startup water supply setpoint before the actual water supply temperature exceeds the setpoint, the controller ensures that the interval between the adjusted setpoint and the actual water supply temperature is not less than the chilled water pump's delayed shutdown time, thus preventing chiller unit restart failure.

Description

Technical Field

[0001] This application relates to the field of intelligent air conditioning technology, and in particular to a start-up control method and related device for a chiller unit. Background Art

[0002] Currently, the restart process for chiller units after shutdown is as follows: After the chiller unit shuts down, the chilled water pump shuts down after a first delay. When the actual supply water temperature of the chiller unit is higher than the set start-up temperature, the chiller unit is started, assuming the chilled water pump is already on. If the chilled water pump is off at this time, it will be switched back to the on state.

[0003] However, when the interval between the chiller unit's shutdown and startup is shorter than the first delay time of the chilled water pump, the chilled water pump may not completely shut down. That is, the chilled water pump may remain on even though the chiller unit meets the restart conditions. During the restart process, the chilled water pump switches from the on state to the off state. This results in insufficient water flow during the restart, causing a chiller unit malfunction and shutdown, and ultimately, a failed restart. Summary of the Invention

[0004] In view of this, this application provides a start-up control method and related device for a chiller unit to avoid restart failure after the chiller unit is shut down.

[0005] In a first aspect, this application provides a start-up control method for a chiller unit. This method can be applied to a controller in a chilled water system where the chiller unit is located. The method includes: after the controller controls the chiller unit to shut down, if the actual water supply temperature of the chiller unit is not greater than the start-up water supply set temperature value of the chiller unit, the controller increases the start-up water supply set temperature value; and the controller controls the chiller unit to restart based on the increased start-up water supply set temperature value.

[0006] Compared to existing technologies, this application adjusts the start-up water supply set temperature using a controller before the actual water supply temperature of the chiller unit is greater than the start-up water supply set temperature of the chiller unit. This ensures that the time interval between the adjusted start-up water supply set temperature and the actual water supply temperature is not less than the chilled water pump delay shutdown time, thereby preventing the chiller unit from failing to restart.

[0007] In one possible design, the chilled water system in which the chiller unit is located includes a chilled water pump; the controller increases the start-up water supply set temperature value by: the controller determining the temperature difference between the actual water supply temperature value and the temperature difference during the delayed shutdown period of the chilled water pump; the controller using the sum of the temperature difference and the start-up water supply set temperature value as the increased start-up water supply set temperature value.

[0008] This application utilizes the controller to sum the temperature difference between the actual water supply temperature and the chilled water pump delayed shutdown time period and the start-up water supply set temperature value, as the adjusted start-up water supply set temperature value, so that the interval between the chiller unit's shutdown and restart is not less than the chilled water pump delayed shutdown time period.

[0009] In one possible design, the controller determines the temperature difference value of the actual water supply temperature value rising during the chilled water pump delayed shutdown period, including: the controller determining the maximum rate value of the actual water supply temperature value rising to the set temperature value of the start-up water supply during the time period; the controller taking the product of the maximum rate value and the chilled water pump delayed shutdown period as the temperature difference value.

[0010] This application can obtain an accurate temperature difference by measuring the maximum rate at which the actual water supply temperature reaches the set water supply temperature during the start-up period, and the delayed shutdown period of the chilled water pump.

[0011] In one possible design, the controller controls the chiller unit to restart based on the increased start-up water supply set temperature value, including: the controller determining, based on the increased start-up water supply set temperature value, that the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time period; and the controller controlling the chiller unit to restart when the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time period, and the chilled water pump is in the on state.

[0012] This application ensures that the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the chilled water pump, and that the chilled water pump is in the on state, thereby avoiding the failure of the chiller unit to restart due to the shutdown of the chilled water pump during the restart process.

[0013] In one possible design, the chilled water system containing the chiller unit further includes a cooling water pump; the controller controls the chiller unit to restart when the interval between the chiller unit's shutdown and restart is not less than the delayed shutdown time of the chilled water pump, and the chilled water pump is in the on state, including: the controller controls the chiller unit to restart when the interval between the chiller unit's shutdown and restart is not less than the delayed shutdown time of the chilled water pump, the interval between the chiller unit's shutdown and restart is not less than the delayed shutdown time of the cooling water pump, and the chilled water pump is in the on state, and the cooling water pump is in the on state, wherein the delayed shutdown time of the cooling water pump is determined based on the increased start-up water supply set temperature value.

[0014] In a chilled water system containing both chilled water pumps and cooling water pumps, this application ensures that the interval between the chiller unit's shutdown and restart is not less than the delayed shutdown time of the chilled water pump, and the interval between the chiller unit's shutdown and restart is not less than the delayed shutdown time of the cooling water pump, while both the chilled water pump and the cooling water pump are in the on state. This prevents the chiller unit from failing to restart due to the shutdown of the chilled water pump and / or the cooling water pump.

[0015] In one possible design, after the chiller unit is restarted, the method includes: the controller determining that the chiller unit is in an on state based on at least one of the following: the operating state value of the chiller unit, the load rate of the chiller unit, and the current percentage of the chiller unit.

[0016] This application can accurately determine the operating status of the chiller unit by using the operating status value, load rate, and current percentage of the chiller unit.

[0017] In one possible design, the method further includes: the controller determining that the chilled water pump is in an on state based on at least one of the following: the operating status value of the chilled water pump, and the water flow switch signal of the chilled water pump.

[0018] This application can accurately determine the on / off status of the chilled water pump by using the operating status value of the chilled water pump or the water flow switch signal of the chilled water pump.

[0019] Secondly, this application also provides a start-up control system for a chiller unit, the start-up control system for the chiller unit comprising: a controller, a chiller unit, and a temperature sensor; the chiller unit is used to cool water; the temperature sensor is used to detect the actual temperature value of the water supplied by the chiller unit and send the actual temperature value of the water supplied to the controller; the controller is used to execute the method provided as in the first aspect or any possible implementation thereof.

[0020] Thirdly, this application also provides a start-up control device for a chiller unit, the device comprising: an adjustment unit, configured to increase the start-up water supply set temperature value after the chiller unit is shut down, provided that the actual water supply temperature value of the chiller unit is not greater than the start-up water supply set temperature value of the chiller unit; and a control unit, configured to control the chiller unit to restart based on the increased start-up water supply set temperature value.

[0021] In one possible design, the chilled water system in which the chiller unit is located includes a chilled water pump; the adjustment unit is specifically used to: determine the temperature difference between the actual temperature of the water supply and the temperature difference during the delayed shutdown period of the chilled water pump; and use the sum of the temperature difference and the set temperature of the start-up water supply as the adjusted set temperature of the start-up water supply.

[0022] In one possible design, the adjustment unit is further configured to: determine the maximum rate value during the time period during which the actual water supply temperature value increases to the set water supply temperature value at startup; and use the product of the maximum rate value and the time period during which the chilled water pump is delayed in shutting down as the temperature difference value.

[0023] In one possible design, the control unit is specifically used to: determine, based on the increased start-up water supply set temperature value, that the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time; and, when the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time and the chilled water pump is in the on state, control the chiller unit to restart.

[0024] In one possible design, the chilled water system where the chiller unit is located also includes a cooling water pump; the control unit is specifically used to: control the chiller unit to restart when the interval between the chiller unit's shutdown and restart is not less than the delayed shutdown time of the chilled water pump, the interval between the chiller unit's shutdown and restart is not less than the delayed shutdown time of the cooling water pump, and the chilled water pump is in the on state, and the cooling water pump is in the on state, wherein the delayed shutdown time of the cooling water pump is determined based on the increased start-up water supply set temperature value.

[0025] In one possible design, the control unit is further configured to: determine that the chiller unit is in an on state based on at least one of the following: the operating state value of the chiller unit, the load rate of the chiller unit, and the current percentage of the chiller unit.

[0026] In one possible design, the device further includes: determining that the chilled water pump is in an on state based on at least one of the following: the operating status value of the chilled water pump, and the water flow switch signal of the chilled water pump.

[0027] Fourthly, embodiments of this application provide a controller, including: a processor and a memory; the memory for storing computer program instructions; and the processor for reading the computer program instructions from the memory, causing the controller to execute the method provided in any of the foregoing aspects or any possible implementations of any of the foregoing aspects.

[0028] Fifthly, this application also provides a computer-readable storage medium, including: computer program instructions, which, when executed by a controller of a chiller unit, cause the controller to perform the method provided in any of the foregoing aspects or any possible implementations of any of the foregoing aspects.

[0029] Sixthly, this application provides a computer program product including computer instructions that, when executed by a controller, cause the controller to perform the methods provided in any of the foregoing aspects or any possible implementations thereof. The computer program product can be a software installation package, which can be downloaded and executed on a computing device when the methods provided in any of the foregoing aspects or any possible implementations thereof are required.

[0030] In a seventh aspect, this application also provides a chip, the chip including a processor and a memory; the processor is coupled to the memory, the processor being configured to read computer program instructions stored in the memory, causing the chip to execute the methods provided in any of the foregoing aspects or any possible implementations of any of the foregoing aspects. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a centrifugal chilled water system in the prior art.

[0032] Figure 2 This is a schematic diagram illustrating a chiller unit failing to restart in existing technology.

[0033] Figure 3 A schematic flowchart illustrating a start-up control method for a chiller unit provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram illustrating a successful restart of a chiller unit, provided in an embodiment of this application.

[0035] Figure 5 A schematic diagram of the structure of a start-up control device for a chiller unit provided in an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the structure of a controller provided in an embodiment of this application. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0038] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data used can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0039] A chiller unit is short for a central air conditioning chilled water refrigeration unit, also known as a refrigeration unit. A chiller unit mainly consists of a compressor, evaporator, condenser, expansion joint, and other equipment. Chiller units can be classified according to their compressor type (centrifugal, screw, etc.) and according to their cooling method (water-cooled, air-cooled, etc.).

[0040] Chillers are the main equipment in a chilled water system used to produce chilled water. For example... Figure 1 As shown, the chilled water system may include a chiller unit 101, a chilled water pump 102, and a cooling water pump 103. The chiller unit 101 and cooling water pump 103 are connected to a cooling tower 104, and the chiller unit 101 and chilled water pump 102 are connected to a load terminal 105. The chilled water system can also be called a refrigeration system, a cold source system, etc. Chilled water systems can be applied in scenarios requiring air conditioning or process chilled water, such as buildings, data centers, and factory production. Furthermore, both the chilled water pump 102 and the cooling water pump 103 can be represented as circulating water pumps, meaning that circulating water pumps are devices that provide the power for circulating chilled water or cooling water to the chiller unit.

[0041] Optionally, the chilled water system may also include a controller. Figure 1As shown in the diagram of the chilled water system, the startup sequence is: controller controls the chilled water pump to start → controller controls the cooling water pump to start → controller controls the chiller unit to start. The shutdown sequence is: controller controls the chiller unit to shut down → controller controls the cooling water pump to shut down → controller controls the chilled water pump to shut down.

[0042] like Figure 2 As shown, the current restart process for a chiller unit after shutdown is as follows: After the controller shuts down the chiller unit, the actual supply water temperature (ts) will increase. When the actual supply water temperature (ts) exceeds the chiller unit's start-up set temperature, the controller starts the chiller unit, based on the controller keeping the chilled water pump on. If the chilled water pump is off at this time, the controller will adjust it to be on.

[0043] However, when the interval ΔT2 between the chiller unit's shutdown and startup is less than the first delay time ΔT1 of the chilled water pump, the chilled water pump may not be completely shut down. That is, the chilled water pump is on, and the chiller unit meets the restart conditions. However, during the chiller unit restart process, the controller switches the chilled water pump from the on state to the off state. This causes insufficient water flow during the chiller unit restart process, leading to a malfunction and shutdown of the chiller unit, and the chiller unit restart fails.

[0044] Therefore, embodiments of this application provide a start-up control method and related apparatus for a chiller unit. To make the objectives, technical solutions, and advantages of this application clearer, a further detailed description will be provided below with reference to the accompanying drawings.

[0045] like Figure 3 As shown, one embodiment of this application provides a start-up control method for a chiller unit. This method can be applied to, for example... Figure 1 The controller in the chilled water system is shown below. (See attached diagram.) Figure 3 The methods provided in the embodiments of this application will be described.

[0046] S301: After the controller shuts down the chiller unit, if the actual water supply temperature of the chiller unit is not greater than the start-up water supply set temperature of the chiller unit, the start-up water supply set temperature will be increased.

[0047] In one possible embodiment, the chilled water system in which the chiller unit is located includes a chilled water pump. In S301, the controller first determines the maximum rate at which the actual supply water temperature increases to the start-up supply water set temperature during the time period. Then, the controller multiplies the maximum rate by the chilled water pump's delayed shutdown time period as the temperature difference that the actual supply water temperature increases during the chilled water pump's delayed shutdown time period. Finally, the controller sums the temperature difference with the start-up supply water set temperature as the adjusted start-up supply water set temperature.

[0048] For example, such as Figure 4 As shown, after the controller shuts down the chiller unit, the actual supply water temperature ts will rise. Before the actual supply water temperature ts exceeds the start-up supply water setting temperature tset1, the controller adjusts the start-up supply water setting temperature from tset1 to tset2. For example, assuming the maximum rate of increase of the actual supply water temperature ts to the start-up supply water setting temperature tset1 within the time interval ΔT3 is km, then the temperature difference Δts = km × ΔT1 during the chilled water pump delayed shutdown time interval ΔT1. Therefore, tset2 = tset1 + Δt, where Δt is greater than or equal to Δts. After adjusting the start-up supply water setting temperature, the controller ensures that the interval ΔT2 between the chiller unit's shutdown and restart is greater than or equal to the chilled water pump delayed shutdown time interval ΔT1.

[0049] In one possible embodiment, the chilled water system where the chiller unit is located may further include a cooling water pump. In S301, after the controller determines the temperature difference between the actual supply water temperature and the temperature difference during the delayed shutdown period of the chilled water pump according to the above steps, the controller also needs to take the product of the maximum rate value and the delayed shutdown period of the cooling water pump as the first temperature difference between the actual supply water temperature and the temperature difference during the delayed shutdown period of the cooling water pump. Then, the controller uses the sum of the temperature difference, the first temperature difference, and the start-up supply water set temperature value as the increased start-up supply water set temperature value. This is only an example, and this application does not limit the specific implementation method of the controller increasing the start-up supply water set temperature value when the chilled water system includes a chilled water pump and / or a cooling water pump.

[0050] Optionally, the controller can also determine the temperature difference Δts that rises from the actual supply water temperature ts of the chiller unit during the chilled water pump delayed shutdown period ΔT1, based on historical reference data of the chiller unit operating under the same conditions; or, the controller can determine the temperature difference Δts that rises from the actual supply water temperature ts of the chiller unit during the chilled water pump delayed shutdown period ΔT1, based on the load rate of the terminal connected to the chiller unit. This is merely an illustrative example, and this application does not limit the specific method for determining the temperature difference Δts that rises from the actual supply water temperature ts during the chilled water pump delayed shutdown period ΔT1.

[0051] Similarly, the controller can determine the first temperature difference Δt's of the increase in the actual supply water temperature ts of the chiller unit during the cooling water pump delayed shutdown period ΔT'1, based on historical reference data of the chiller unit operating under the same conditions; or, the controller can determine the first temperature difference Δt's of the increase in the actual supply water temperature ts of the chiller unit during the cooling water pump delayed shutdown period ΔT'1, based on the load rate of the terminal connected to the chiller unit. This is merely an example, and this application does not limit the specific method for determining the first temperature difference Δt's of the increase in the actual supply water temperature ts during the cooling water pump delayed shutdown period ΔT'1.

[0052] After adjusting the start-up water supply set temperature value of the chiller unit, the controller continues to execute step S302.

[0053] S302: The controller restarts the chiller unit based on the increased start-up water supply set temperature.

[0054] Optionally, if the chilled water system to which the chiller unit is located includes a chilled water pump, the controller, based on the increased start-up water supply setpoint temperature, determines that the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time. The controller then restarts the chiller unit if the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time, and if the chilled water pump is in the on state.

[0055] For example, continue according to Figure 4 To illustrate, after the controller adjusts the start-up water supply setpoint from tset1 to tset2, it ensures that the interval ΔT2 between the chiller unit's shutdown and restart is greater than or equal to the chilled water pump's delayed shutdown time ΔT1. Since the chiller unit is still off, the actual supply water temperature ts will continue to rise. When the increased actual supply water temperature ts exceeds the start-up setpoint tset2, if the chilled water pump is off, the controller will turn it on. With the chilled water pump on and the actual supply water temperature ts exceeding the start-up setpoint tset2, the chiller unit's startup conditions are met, and the controller restarts the chiller unit. After successful restart, the actual supply water temperature ts will decrease, and after reaching a certain temperature, it will gradually stabilize.

[0056] In one possible embodiment, the chilled water system containing the chiller unit also includes a cooling water pump. Based on the increased start-up water supply setpoint temperature, the controller needs to ensure that the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time, and also that the interval between the chiller unit's shutdown and restart is not less than the cooling water pump's delayed shutdown time. When both the chiller unit's shutdown and restart interval are not less than the chilled water pump's delayed shutdown time, and both the chilled water pump and cooling water pump are on, the controller restarts the chiller unit. The process of the controller controlling the cooling water pump can be referred to the process of the controller controlling the chilled water pump described above, and will not be repeated here.

[0057] In addition, after the chiller unit restarts, the controller can determine that the chiller unit is in the on state based on at least one of the following: the chiller unit's operating status value, the chiller unit's load rate, and the chiller unit's current percentage. Simultaneously, the controller can also determine that the chilled water pump is in the on state based on the chilled water pump's operating status value and / or the chilled water pump's flow switch signal. Furthermore, the controller can also determine that the cooling water pump is in the on state based on the cooling water pump's operating status value and / or the cooling water pump's flow switch signal.

[0058] This application adjusts the start-up water supply set temperature value before the actual water supply temperature value of the chiller unit is greater than the start-up water supply set temperature value of the chiller unit. This ensures that the time interval between the adjusted start-up water supply set temperature value and the actual water supply temperature value is not less than the chilled water pump delay shutdown time interval, thereby avoiding the chiller unit restart failure.

[0059] This application also provides a start-up control system for a chiller unit, which includes a controller, a chiller unit, and a temperature sensor. The chiller unit is used to cool water; the temperature sensor is used to detect the actual temperature of the water supplied to the chiller unit and send the actual temperature value to the controller; the controller is used to execute the aforementioned start-up control method for the chiller unit.

[0060] like Figure 5 As shown, this application also provides a start-up control device for a chiller unit, the device comprising:

[0061] Adjustment unit 501 is used to increase the start-up water supply set temperature value after the chiller unit is turned off, provided that the actual water supply temperature value of the chiller unit is not greater than the start-up water supply set temperature value of the chiller unit.

[0062] Control unit 502 is used to control the chiller unit to restart based on the increased start-up water supply set temperature value.

[0063] In one possible design, the chilled water system containing the chiller unit includes a chilled water pump; the regulating unit 501 is specifically used for:

[0064] Determine the temperature difference that causes the actual water supply temperature to rise during the delayed shutdown period of the chilled water pump;

[0065] The sum of the temperature difference and the set water supply temperature at startup is used as the adjusted set water supply temperature at startup.

[0066] In one possible design, the adjustment unit 501 is further used for:

[0067] Determine the maximum rate at which the actual water supply temperature rises to the set water supply temperature during the period of time.

[0068] The product of the maximum rate value and the chilled water pump's delayed shutdown time period is used as the temperature difference value.

[0069] In one possible design, the control unit 502 is specifically used for:

[0070] Based on the increased start-up water supply set temperature, the time interval between the chiller unit's shutdown and restart is determined to be no less than the chilled water pump's delayed shutdown time.

[0071] If the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the chilled water pump, and the chilled water pump is in the on state, control the chiller unit to restart.

[0072] In one possible design, the chilled water system containing the chiller unit also includes a cooling water pump; the control unit 502 is specifically used for:

[0073] The chiller unit is restarted when the interval between shutting down and restarting is not less than the delayed shutdown time of the chilled water pump, and the chilled water pump and the cooling water pump are both in the on state. The delayed shutdown time of the cooling water pump is determined based on the increased start-up water supply set temperature value.

[0074] In one possible design, the control unit 502 is further used for:

[0075] The chiller unit is determined to be in the on state based on at least one of the following:

[0076] Operating status values ​​of the chiller unit, load rate of the chiller unit, and current percentage of the chiller unit.

[0077] In one possible design, the device also includes:

[0078] Determine that the chilled water pump is on based on at least one of the following:

[0079] Operating status values ​​of the chilled water pump and flow switch signals of the chilled water pump.

[0080] It should be noted that the module division in this embodiment is illustrative and represents only one logical functional division; in actual implementation, there may be other division methods. The functional modules in this embodiment can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules can be implemented in hardware or as software functional modules.

[0081] The above methods can be implemented wholly or partially through software, hardware, firmware, or any other combination thereof. When implemented in software, the above methods can be implemented wholly or partially in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on a computer, all or part of the flow or function according to the embodiments of the present invention is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive (SSD).

[0082] like Figure 6 The device 600 shown includes at least one processor 601 and a memory 602, and optionally, may also include a communication interface 603.

[0083] Memory 602 may be volatile memory, such as random access memory; it may also be non-volatile memory, such as read-only memory, flash memory, hard disk drive (HDD), or solid-state drive (SSD); or memory 602 may be any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. Memory 602 may be a combination of the above-described memories.

[0084] The specific connection medium between the processor 601 and the memory 602 described above is not limited in the embodiments of this application.

[0085] Processor 601 can be a CPU, but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, artificial intelligence chips, on-chip chips, etc. A general-purpose processor can be a microprocessor or any conventional processor. In other words... Figure 6 The device can also be equipped with a separate data transceiver module, such as the communication interface 603, for sending and receiving data; when the processor 601 communicates with other devices, it can transmit data through the communication interface 603.

[0086] In one possible application scenario, the controller adopts... Figure 6 The form shown, Figure 6 The processor 601 can call computer execution instructions stored in the memory 602, enabling the controller to execute the chiller unit start-up control method in any of the above method embodiments.

[0087] Specifically, Figure 5 The functions / implementation processes of the adjustment unit 501 and the control unit 502 can all be achieved through... Figure 6 The processor 601 in the memory calls computer execution instructions stored in memory 602 to implement the function. Alternatively, Figure 5 The function / implementation process of the adjustment unit 501 can be achieved through Figure 6 The processor 601 in the memory calls computer execution instructions stored in the memory 602 to implement this. Figure 5 The function / implementation process of the control unit 502 can be achieved through Figure 6 It is implemented using the communication interface 603.

[0088] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0089] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0090] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0091] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0092] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A start-up control method for a chiller unit, characterized in that, The chilled water system in which the chiller unit is located includes a chilled water pump; the method includes: After shutting down the chiller unit, if the actual water supply temperature of the chiller unit is not greater than the start-up water supply set temperature of the chiller unit, the start-up water supply set temperature is increased; increasing the start-up water supply set temperature includes: Determine the temperature difference by which the actual water supply temperature rises during the delayed shutdown period of the chilled water pump; The sum of the temperature difference and the set water supply temperature is used as the adjusted set water supply temperature. Based on the increased start-up water supply set temperature, the chiller unit is controlled to restart.

2. The method as described in claim 1, characterized in that, Determining the temperature difference that causes the actual water supply temperature to rise during the delayed shutdown period of the chilled water pump includes: Determine the maximum rate at which the actual water supply temperature increases to the set water supply temperature during the time period. The product of the maximum rate value and the delayed shutdown time of the chilled water pump is used as the temperature difference value.

3. The method as described in claim 2, characterized in that, The step of controlling the chiller unit to restart based on the increased start-up water supply set temperature includes: Based on the increased start-up water supply set temperature, it is determined that the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time. If the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the chilled water pump, and the chilled water pump is in the on state, the chiller unit is controlled to restart.

4. The method as described in claim 3, characterized in that, The chilled water system where the chiller unit is located also includes a cooling water pump; the step of controlling the chiller unit to restart when the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time, and the chilled water pump is in the on state, includes: When the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the chilled water pump, and the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the cooling water pump, and the chilled water pump and the cooling water pump are both in the on state, the chiller unit is controlled to restart. The delayed shutdown time of the cooling water pump is determined based on the increased start-up water supply set temperature value.

5. The method according to any one of claims 1-4, characterized in that, After the chiller unit is restarted, the method further includes: The chiller unit is determined to be in the on state based on at least one of the following: The operating status value of the chiller unit, the load rate of the chiller unit, and the current percentage of the chiller unit.

6. The method according to any one of claims 1-4, characterized in that, The method further includes: The chilled water pump is determined to be in the on state based on at least one of the following: The operating status value of the chilled water pump and the water flow switch signal of the chilled water pump.

7. A start-up control system for a chiller unit, characterized in that, The start-up control system of the chiller unit includes: a controller, the chiller unit, and a temperature sensor; The chiller unit is used to cool water; The temperature sensor is used to detect the actual water supply temperature of the chiller unit and send the actual water supply temperature to the controller. The controller is configured to perform the method as described in any one of claims 1-6.

8. A start-up control device for a chiller unit, characterized in that, The chilled water system in which the chiller unit is located includes a chilled water pump; the device includes: An adjustment unit is used to, after shutting down the chiller unit, increase the start-up water supply set temperature value if the actual water supply temperature of the chiller unit is not greater than the start-up water supply set temperature value of the chiller unit; the increase of the start-up water supply set temperature value includes: determining the temperature difference between the actual water supply temperature value and the chilled water pump delayed shutdown time period; and using the sum of the temperature difference and the start-up water supply set temperature value as the increased start-up water supply set temperature value. The control unit is used to control the chiller unit to restart based on the adjusted start-up water supply set temperature value.

9. The apparatus as claimed in claim 8, characterized in that, The adjustment unit is further specifically used for: Determine the maximum rate at which the actual water supply temperature increases to the set water supply temperature during the time period. The product of the maximum rate value and the delayed shutdown time of the chilled water pump is used as the temperature difference value.

10. The apparatus as claimed in claim 8 or 9, characterized in that, The control unit is specifically used for: Based on the increased start-up water supply set temperature, it is determined that the interval between the chiller unit's shutdown and restart is not less than the chilled water pump's delayed shutdown time. If the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the chilled water pump, and the chilled water pump is in the on state, the chiller unit is controlled to restart.

11. The apparatus as claimed in claim 10, characterized in that, The chiller system also includes a cooling water pump; the control unit is specifically used for: When the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the chilled water pump, and the interval between the shutdown and restart of the chiller unit is not less than the delayed shutdown time of the cooling water pump, and the chilled water pump and the cooling water pump are both in the on state, the chiller unit is controlled to restart. The delayed shutdown time of the cooling water pump is determined based on the increased start-up water supply set temperature value.

12. The apparatus according to any one of claims 8-11, characterized in that, The control unit is further specifically used for: The chiller unit is determined to be in the on state based on at least one of the following: The operating status value of the chiller unit, the load rate of the chiller unit, and the current percentage of the chiller unit.

13. The apparatus according to any one of claims 8-12, characterized in that, The device further includes: The chilled water pump is determined to be in the on state based on at least one of the following: The operating status value of the chilled water pump and the water flow switch signal of the chilled water pump.

14. A controller, characterized in that, include: Processor and memory; The memory is used to store computer program instructions; The processor is configured to read computer program instructions from the memory, causing the controller to execute the method as described in any one of claims 1-6.

15. A chip, characterized in that, The chip includes a processor and a memory; the processor is coupled to the memory and is configured to read computer program instructions stored in the memory, causing the chip to perform the method as described in any one of claims 1-6.

16. A computer-readable storage medium, characterized in that, include: Computer program instructions, when executed by the controller of the chiller unit, cause the controller to perform the method as described in any one of claims 1-6.

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