A variable air volume air conditioning system commissioning method and system

Abstract

The present invention belongs to the technical field of variable air volume air conditioning system commissioning, and specifically provides a method and a system for commissioning a variable air volume air conditioning system. The method includes: fully opening the manual regulating valves in front of the variable air volume valves, and obtaining the corresponding relationship between the opening degree and the air volume of the variable air volume valves of each terminal variable air volume device; based on the air volume, establishing a corresponding relationship table between the opening degree value of the variable air volume valve and the opening degree value of the manual regulating valve in front of the variable air volume valve; setting the opening degree value of the variable air volume valve according to the designed air volume of the room, querying the corresponding relationship table, and adjusting the opening degree of the manual regulating valve in front of the variable air volume valve. This solution solves the complexity of the initial commissioning of the variable air volume air conditioning system and lays a foundation for subsequent energy-saving operation. Compared with the traditional method for commissioning a variable air volume air conditioning system, it is more energy-saving and saves a large amount of labor. Moreover, the energy saving of the variable air volume system is significantly improved, the control accuracy of the variable air volume valve is reduced without a significant decrease in accuracy, and the generation of system noise and vibration is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of variable air volume air conditioning system commissioning, and more specifically, to a variable air volume air conditioning system commissioning method and system. Background Art

[0002] A variable air volume air conditioning system is an all-air air conditioning system that changes the supply air volume to meet the changing indoor load. This system has good energy efficiency and comfort, meets the good requirements of users for indoor air quality, and is widely used in various buildings such as office buildings, hospitals, libraries, and gymnasiums.

[0003] When the air conditioning load of a variable air volume air conditioning system changes, the variable air volume terminal device adjusts the valve opening to change the air supply volume of the air conditioner to meet the changing indoor load. After the valve opening of the variable air volume terminal device changes, it causes a change in the static pressure on the air supply duct. Therefore, the automatic control system adjusts the air supply volume of the air conditioner blower by frequency conversion according to the static pressure signal or the terminal valve position signal to meet the load change requirements. Since the air conditioning system is a dynamic system and the load can change at any time, the automatic control system is the key to the stable and energy-efficient operation of the variable air volume air conditioning system, and static pressure control is the core of the variable air volume automatic control system.

[0004] Currently, the static commissioning of variable air volume commissioning technology mainly measures the output air volume manually using an air volume hood. It is necessary to use a hand-held air volume hood to measure each air outlet. Due to the various shapes of the air outlets, cumulative errors are likely to occur.

[0005] This kind of measurement requires a large amount of manpower and material resources. At the same time, after the measurement is completed, the valve needs to be adjusted. After adjusting the valve, it is necessary to measure again, and repeated measurement and adjustment are required. The credibility of the measurement results needs to be doubted. Moreover, the workload is extremely large, which is likely to cause the slack of the operators. At the same time, the manual regulating valve needs to be debugged several times, and the efficiency is very low. Summary of the Invention

[0006] The present invention aims at the technical problem of low initial commissioning efficiency in the existing variable air volume air conditioning system.

[0007] The present invention provides a variable air volume air conditioning system commissioning method, including the following steps:

[0008] S1, fully open the manual regulating valve in front of the variable air volume valve, and obtain the corresponding relationship between the opening degree and the air volume of the variable air volume valve of each terminal variable air volume device;

[0009] S2, based on the air volume, establish a corresponding relationship table between the opening degree value of the variable air volume valve and the opening degree value of the manual regulating valve in front of the variable air volume valve;

[0010] S3. Set the opening value of the variable air volume valve according to the designed air volume of the room, query the corresponding relationship table, and adjust the opening of the manual adjustment valve in front of the variable air volume valve.

[0011] Preferably, the S1 specifically includes: Each time, adjust a single variable air volume valve to obtain the corresponding air volume information, and match and correspond the air volume with the opening value of the variable air volume valve.

[0012] Preferably, the S1 further includes: Control the opening of all variable air volume valves to change from 0 to 100%, correspondingly record the air volume values of all variable air volume valves, and calculate the corresponding total supply air volume value of the entire air conditioning system through calculation.

[0013] Preferably, the S2 specifically includes: Each time, adjust a single variable air volume valve to obtain the corresponding air volume, then fully open the variable air volume valve, adjust the opening of the manual adjustment valve in front of the variable air volume valve to obtain the same air volume, and match and correspond the opening value of the variable air volume valve with the opening value of the manual adjustment valve in front of the variable air volume valve. Repeat this process to obtain the corresponding relationship table between the opening value of the variable air volume valve and the opening value of the manual valve.

[0014] Preferably, the S2 specifically includes: Set the air volume corresponding to the variable air volume valve within the range of 50% - 80% of the designed air volume, arrange them in ascending order according to the change of the opening value of the variable air volume valve, and obtain a set of corresponding opening values of the manual adjustment valve.

[0015] Preferably, the S3 specifically includes:

[0016] S31. Set the air volume of the variable air volume valve to 50% of the designed air volume, and record the opening value of the variable air volume valve;

[0017] S32. Within the two value ranges of 80% of the designed air volume and 50% of the designed air volume, query the corresponding relationship table, arrange the corresponding opening values of the manual adjustment valve in ascending order, and debug the manual valve in front of the variable air volume valve according to the arranged values, so that the opening value of the manual valve is equal to the opening value of 50% of the total number of variable air volume valves;

[0018] S33. Repeat steps S31 - S32, and take the optimal value as the optimal opening of the manual valve.

[0019] Preferably, the S2 specifically includes: Calculate the corresponding K value of the manual valve according to the K value, pressure difference, and flow rate under different openings of the variable air volume valve as follows: V value, pressure difference, and flow rate of the corresponding manual valve as follows: V value as follows:

[0020] ΔP S = ΔP V (1)

[0021] QS = Q V (2)

[0022]

[0023]

[0024] ΔP S ΔP is the pressure difference consumed by the manual valve; V Q is the pressure difference consumed by the variable air volume valve; S Q is the flow rate passing through the moving valve; V Q is the flow rate passing through the moving valve; K Vs K is the flow capacity of the manual valve; Vv K is the flow capacity of the variable air volume valve.

[0025] The present invention also provides a debugging system for a variable air volume air conditioning system, which is used to implement the debugging method of the variable air volume air conditioning system, including:

[0026] A correspondence table establishment module, which is used to fully open the manual regulating valves in front of the variable air volume valves, obtain the correspondence between the opening degree and the air volume of the variable air volume valves of each terminal variable air volume device; and establish a correspondence table between the opening degree values of the variable air volume valves and the opening degree values of the manual regulating valves in front of the variable air volume valves based on the air volume;

[0027] A manual regulating valve adjustment module, which is used to set the opening degree value of the variable air volume valve according to the designed air volume of the room, query the correspondence table, and adjust the opening degree of the manual regulating valve in front of the variable air volume valve.

[0028] The present invention also provides an electronic device, including a memory and a processor, and the processor is used to implement the steps of the debugging method of the variable air volume air conditioning system when executing the computer management program stored in the memory.

[0029] The present invention also provides a computer-readable storage medium, on which a computer management program is stored, and the computer management program is used to implement the steps of the debugging method of the variable air volume air conditioning system when executed by the processor.

[0030] Beneficial effects: A variable air volume air conditioning system debugging method and system provided by the present invention. The method includes: fully opening the manual regulating valves in front of the variable air volume valves, and obtaining the corresponding relationship between the opening degree and the air volume of the variable air volume valves of each terminal variable air volume device; based on the air volume, establishing a corresponding relationship table between the opening degree value of the variable air volume valve and the opening degree value of the manual regulating valve in front of the variable air volume valve; setting the opening degree value of the variable air volume valve according to the designed air volume of the room, querying the corresponding relationship table, and adjusting the opening degree of the manual regulating valve in front of the variable air volume valve. This solution solves the complexity of the initial debugging of the variable air volume air conditioning system and lays a foundation for subsequent energy-saving operation. Compared with the traditional variable air volume air conditioning system debugging method, it is more energy-saving and saves a large amount of labor. Moreover, the energy saving of the variable air volume system is significantly improved, the control accuracy of the variable air volume valve is reduced without significant accuracy decline, and the generation of system noise and vibration is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic diagram of the principle of debugging a variable air volume air conditioning system provided by the present invention;

[0032] Figure 2 FIG. is a schematic diagram of the hardware structure of a possible electronic device provided by the present invention;

[0033] Figure 3 FIG. is a schematic diagram of the hardware structure of a possible computer-readable storage medium provided by the present invention.

[0034] DESCRIPTION OF REFERENCE NUMERALS:

[0035] Air duct 1, manual regulating valve 2, variable air volume valve 3, air conditioning fan 4. DETAILED DESCRIPTION OF THE INVENTION

[0036] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0037] Figure 1 A variable air volume air conditioning system debugging method provided by the present invention includes the following steps:

[0038] S1, fully opening the manual regulating valve 2 in front of the variable air volume valve 3, and obtaining the corresponding relationship between the opening degree and the air volume of the variable air volume valve 3 of each terminal variable air volume device; after the air conditioning fan 4 discharges air, it is discharged through the air duct 1. A variable air volume valve 3 is provided on the air duct 1, and a corresponding manual regulating valve 2 is provided in front of each variable air volume valve 3.

[0039] First, the automatic control system completes the networking work to ensure that each terminal variable air volume device can control the variable air volume valve 3 through a laptop. The air volume measurement signal of the variable air volume can also be wirelessly transmitted to the laptop. Manually adjust the valve 2 in front of all the variable air volume valves 3 to be fully opened.

[0040] Control all the variable air volume valves to open to 100% from the laptop, then check and record the air volume values of all the variable air volume valves 3. Adjust the speed of the frequency converter through the operation terminal of the laptop to accumulate the air volume of all the variable air volume valves, and the total supply air volume value of the entire system can be obtained through calculation. Check whether the air volume of the fan meets the design requirements. If it meets the requirements, lock the frequency of the fan at this value.

[0041] S2. Based on the air volume, establish a correspondence table between the opening value of the variable air volume valve 3 and the opening value of the manual adjustment valve 2 in front of the variable air volume valve 3; set the air volume of the variable air volume valve 3 on the laptop to the designed air volume of the room, and record the opening value of the variable air volume valve 3.

[0042] S3. Set the opening value of the variable air volume valve 3 according to the designed air volume of the room, query the said correspondence table, and adjust the opening of the manual adjustment valve 2 in front of the variable air volume valve 3.

[0043] (1) This debugging method utilizes an important function of the variable air volume valve in the variable air volume system, which is that it can provide real-time feedback on the air volume in the air duct. At the same time, it can also provide real-time feedback on the opening size of the variable air volume valve 3. The debugging personnel can understand the flow rate and valve position opening in the variable air volume valve 3 in real time.

[0044] According to the sizes of the valve positions during the two constant flow rate controls, for the variable air volume valve 3 with a small change in valve position, adjust the manual valve in front of it, which can not only improve the control accuracy of the variable air volume valve 3, but also not increase the resistance of the most unfavorable loop of the system.

[0045] This debugging method mainly changes the characteristics of the pipe network by adjusting the manual valve in front of the variable air volume air conditioning system, ensuring that there are no problems such as unstable control during the later operation of the variable air volume valve 3, too high operating pressure difference of the fan, and increased electric power of the air system.

[0046] In the preferred solution, S1 specifically includes: each time adjust a single variable air volume valve 3 to obtain the corresponding air volume information, and match the air volume with the opening value of the variable air volume valve 3. Through multiple tests, a corresponding opening relationship between a variable air volume valve 3 and the manual adjustment valve 2 in front of it can be obtained.

[0047] In addition, it is also possible to control the opening of all the variable air volume valves to change from 0 to 100%, correspondingly record the air volume values of all the variable air volume valves 3, and obtain the corresponding total supply air volume value of the entire air conditioning system through calculation.

[0048] In a preferred solution, S2 specifically includes: each time, adjust a single variable air volume valve 3 to obtain the corresponding air volume, then fully open this variable air volume valve 3, adjust the opening degree of the manual adjustment valve 2 in front of this variable air volume valve 3 to obtain the same air volume, match and correspond the opening degree value of the variable air volume valve 3 with the opening degree value of the manual adjustment valve 2 in front of this variable air volume valve 3, and repeat this process to obtain the corresponding relationship table between the opening degree value of the variable air volume valve 3 and the opening degree value of the manual valve. The corresponding relationship table is obtained through repeated experiments using the above control variable method.

[0049] Furthermore, set the air volume corresponding to the variable air volume valve 3 within the range of 50% - 80% of the designed air volume, and arrange them in ascending order according to the change of the opening degree value of the variable air volume valve 3 to obtain a set of corresponding opening degree values of the manual adjustment valve 2. The larger the valve, the smaller the control error. Therefore, an opening degree range above half - open is used for debugging and comparison analysis to improve the overall adjustment and control accuracy.

[0050] In a preferred solution, S3 specifically includes:

[0051] S31, set the air volume of the variable air volume valve 3 to 50% of the designed air volume, and record the opening degree value of the variable air volume valve 3;

[0052] S32, within the two value ranges of 80% of the designed air volume and 50% of the designed air volume, check the corresponding relationship table, arrange the corresponding opening degree value changes of the manual adjustment valve 2 in ascending order, and debug the manual valve in front of the variable air volume valve 3 according to the arranged values, so that the opening degree value of the manual valve is equal to the opening degree value of the variable air volume valve 3 corresponding to 50% of the total;

[0053] S33, repeat steps S31 - S32, and take the optimal value as the optimal opening degree of the manual valve.

[0054] It can be seen from this that set the air volume of the variable air volume valve 3 on the computer to 50% of the designed air volume, and record the opening degree value of the variable air volume valve 3. Within the two value ranges of 80% of the designed air volume and 50% of the designed air volume, arrange them in ascending order according to the change of the opening degree value of the variable air volume valve 3. Debug the manual valve in front of the variable air volume valve 3 according to the arranged values so that its opening degree is equal to the opening degree value of the variable air volume valve 3 corresponding to 50% of the total. Repeat this action more than 2 - 3 times to obtain the optimal opening degree of the manual valve.

[0055] In a preferred solution, S2 specifically includes: calculate the corresponding K value of the manual valve according to the K value, pressure difference, and flow rate under different opening degrees of the variable air volume valve V value, pressure difference, and flow rate as follows: V value as follows:

[0056] ΔP S =ΔP V (1)

[0057] Q S = Q V (2)

[0058]

[0059]

[0060] ΔP S ΔP is the pressure difference consumed by the manual valve; V Q is the pressure difference consumed by the variable air volume valve; S Q is the flow rate passing through the moving valve; V Q is the flow rate passing through the moving valve; K Vs K is the flow capacity of the manual valve; Vv K is the flow capacity of the variable air volume valve.

[0061] Finally, the following correspondence table is obtained:

[0062]

[0063] The present invention also provides a debugging system for a variable air volume air conditioning system, which is used to implement the debugging method of the variable air volume air conditioning system, including:

[0064] A correspondence table establishment module, configured to fully open the manual adjustment valves in front of the variable air volume valves, obtain the correspondence between the opening degree and the air volume of the variable air volume valves of each terminal variable air volume device; and establish a correspondence table between the opening degree value of the variable air volume valve and the opening degree value of the manual adjustment valve in front of the variable air volume valve based on the air volume;

[0065] A manual adjustment valve adjustment module, configured to set the opening degree value of the variable air volume valve according to the designed air volume of the room, query the correspondence table, and adjust the opening degree of the manual adjustment valve in front of the variable air volume valve.

[0066] Please refer to Figure 2 which is a schematic diagram of an embodiment of an electronic device provided by an embodiment of the present invention. As Figure 2 shown, an embodiment of the present invention provides an electronic device, including a memory 1310, a processor 1320, and a computer program 1311 stored in the memory 1310 and executable on the processor 1320. When the processor 1320 executes the computer program 1311, the following steps are implemented: S1, fully open the manual adjustment valves in front of the variable air volume valves, and obtain the correspondence between the opening degree and the air volume of the variable air volume valves of each terminal variable air volume device;

[0067] S2, establish a correspondence table between the opening degree value of the variable air volume valve and the opening degree value of the manual adjustment valve in front of the variable air volume valve based on the air volume;

[0068] S3. Set the opening value of the variable air volume valve according to the designed air volume of the room, query the corresponding relationship table, and adjust the opening of the manual adjustment valve in front of the variable air volume valve.

[0069] Please refer to Figure 3 FIG. is a schematic diagram of an embodiment of a computer-readable storage medium provided by the present invention. As Figure 3 shown, this embodiment provides a computer-readable storage medium 1400, on which a computer program 1411 is stored. When the computer program 1411 is executed by a processor, the following steps are implemented: S1. Fully open the manual adjustment valve in front of the variable air volume valve, and obtain the corresponding relationship between the opening and air volume of the variable air volume valve of each terminal variable air volume device.

[0070] S2. Based on the air volume, establish a corresponding relationship table between the opening value of the variable air volume valve and the opening value of the manual adjustment valve in front of the variable air volume valve.

[0071] S3. Set the opening value of the variable air volume valve according to the designed air volume of the room, query the corresponding relationship table, and adjust the opening of the manual adjustment valve in front of the variable air volume valve.

[0072] It should be noted that in the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A method for commissioning a variable air volume air conditioning system, characterized in that, It includes the following steps: S1. Fully open the manual regulating valves in front of the variable air volume valves, and obtain the corresponding relationship between the opening degree and the air volume of the variable air volume valves of each terminal variable air volume device; S2. Based on the air volume, establish a corresponding relationship table between the opening degree value of the variable air volume valve and the opening degree value of the manual regulating valve in front of the variable air volume valve. Specifically, it includes: each time a single variable air volume valve is adjusted to obtain the corresponding air volume, then fully open the variable air volume valve, adjust the opening degree of the manual regulating valve in front of the variable air volume valve to obtain the same air volume, and match and correspond the opening degree value of the variable air volume valve with the opening degree value of the manual regulating valve in front of the variable air volume valve. Repeat this process to obtain the corresponding relationship table between the opening degree value of the variable air volume valve and the opening degree value of the manual valve. Among them, set the air volume corresponding to the variable air volume valve to be within the range of 50% - 80% of the designed air volume, and arrange them in ascending order according to the change of the opening degree value of the variable air volume valve to obtain a set of corresponding opening degree values of the manual regulating valves; S3. Set the opening degree value of the variable air volume valve according to the designed air volume of the room, query the corresponding relationship table, and adjust the opening degree of the manual regulating valve in front of the variable air volume valve. Specifically, it includes: S31. Set the air volume of the variable air volume valve to 50% of the designed air volume, and record the opening degree value of the variable air volume valve; S32. Within the two value ranges of 80% of the designed air volume and 50% of the designed air volume, query the corresponding relationship table, arrange the corresponding opening degree values of the manual regulating valves in ascending order, and debug the manual valve in front of the variable air volume valve according to the arranged values, so that the opening degree value of the manual valve is equal to the opening degree value of 50% of the total number of variable air volume valves; S33. Repeat steps S31 - S32, and take the optimal value as the optimal opening degree of the manual valve.

2. The method for commissioning a variable air volume air conditioning system according to claim 1, wherein The specific content of S1 includes: each time a single variable air volume valve is adjusted to obtain the corresponding air volume information, and match and correspond the air volume with the opening degree value of the variable air volume valve.

3. The debugging method of the variable air volume air conditioning system according to claim 1, wherein S1 also includes: controlling the opening degrees of all variable air volume valves to change from 0 to 100%, corresponding to record the air volume values of all variable air volume valves, and calculating the corresponding total supply air volume value of the entire air conditioning system.

4. The debugging method of the variable air volume air conditioning system according to claim 1, characterized in that, The specific steps of S2 include: calculating the corresponding K value of the manual valve according to the K value, differential pressure, and flow rate at different opening degrees of the variable air volume valve V as follows: V value, differential pressure, and flow rate at different opening degrees of the variable air volume valve ΔP S = ΔP V (1) Q S = Q V (2) ΔP S The manual valve requires a pressure difference consumption; ΔP V The variable air volume valve requires a pressure difference consumption; Q S The flow rate passing through the moving valve; Q V The flow rate passing through the moving valve; K Vs The flow capacity of the manual valve; K Vv The flow capacity of the variable air volume valve.

5. A variable air volume air conditioning system commissioning system, characterized in that, The system is used to implement the debugging method of the variable air volume air conditioning system as described in any one of claims 1 - 4, and includes: A corresponding relationship table establishment module, which is used to fully open the manual regulating valves in front of the variable air volume valves, obtain the corresponding relationship between the opening degree and the air volume of the variable air volume valves of each terminal variable air volume device; and establish a corresponding relationship table between the opening degree value of the variable air volume valve and the opening degree value of the manual regulating valve in front of the variable air volume valve based on the air volume; A manual regulating valve adjustment module, which is used to set the opening degree value of the variable air volume valve according to the designed air volume of the room, query the corresponding relationship table, and adjust the opening degree of the manual regulating valve in front of the variable air volume valve.

6. An electronic device, characterized in that, It includes a memory and a processor. When the processor executes the computer management program stored in the memory, it realizes the steps of the debugging method of the variable air volume air conditioning system as described in any one of claims 1 - 4.

7. A computer-readable storage medium, characterized in that, A computer management program is stored thereon, and when the computer management program is executed by a processor, the steps of the variable air volume air conditioning system commissioning method described in any one of claims 1-4 are implemented.

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