Air volume adjusting method of variable air volume air conditioning system

Abstract

The invention relates to the technical field of air conditioners, in particular to an air volume adjusting method of a variable-air-volume air conditioning system. According to the air volume adjusting method of the variable air volume air conditioning system, all the air distributors on each branch main pipe are sequentially adjusted, so that the ratio of the actual air outlet volume of the air outlet where each air distributor is located on the branch main pipe to the rated air outlet volume of the air outlet and the ratio of the branch main pipe meet the rated difference value; uniform air outlet of each air outlet under the same branch main pipe can be ensured, and the air outlet is matched with the air supply amount of the branch main pipe; and after all the air distributors are adjusted, the air valves are adjusted, so that the ratio of the actual air supply amount of each branch main pipe to the rated air supply amount of the branch main pipe and the ratio of the central air conditioner meet the rated difference value. Therefore, the problems of long adjustment period and low efficiency caused by the fact that the branch main pipes are influenced and need to be adjusted again when air volume adjustment of the air outlets is completed due to the fact that the air supply volume of the branch main pipes is adjusted firstly and then the air volume of the air outlets is adjusted in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air volume adjustment method for a variable air volume air conditioning system. Background Art

[0002] During the shipbuilding process, the installation of air conditioning systems is involved. Usually, the air conditioning system adopts the form of central air conditioning, that is, the air conditioning host centrally performs cooling or heating, and then the cold air or hot air is transported to the air outlet of each cabin through pipes, and the temperature of each cabin is controlled at the same time. Figure 1 The figure shows a schematic diagram of the structure of an air conditioning system in the prior art. The air conditioning system includes a central air conditioner 1, and air ducts connected to the central air conditioner 1, the air outlet, and each cabin. The air duct includes a main duct 2 and a branch main duct 21 connected to the main duct 2. Each branch main duct 21 is further divided into a branch duct 22. The air outlet of the air duct is arranged at the end of the branch duct 22 and corresponds to the branch duct one by one. That is to say, the air volume of the air outlet is equal to the air volume of the branch duct 22. In order to adjust the air volume of each air outlet, the air conditioning system also includes an air valve 5 located on the branch main duct and an air distributor 6 arranged on the branch duct (i.e., at the air outlet). The air volume of each air outlet is adjusted by adjusting the opening of the air valve 5 and the air distributor 6, and finally uniform air outlet is achieved at each air outlet. In order to ensure safety, a fire damper 3 is also arranged on the air duct to prevent the flame from spreading through the air duct in the event of a fire.

[0003] In the process of adjusting the air volume, since the air volume is discharged from the central air conditioner, as the air duct is lengthened and the number of bends in the air duct increases, the air outlet resistance of the air duct will increase accordingly, that is to say, the air outlet resistance faced by different air outlets is different. If the air valves and air distributors of each air outlet have the same opening, the air volume of the air outlet close to the central air conditioner or with fewer bends will be large, and the air volume of the air outlet far away from the central air conditioner or with more bends will be small, which will cause uneven air outlets in different cabins. Therefore, it is necessary to keep each air valve and branch pipe at different openings.

[0004] The adjustment in the prior art is to turn on the central air conditioner during the adjustment process, and adjust the air valve and the air distributor to the fully open state, adjust according to the different flow rates on each branch main pipe, reduce the branch main pipe with a large air output, and then balance the air output of multiple branch main pipes, and then adjust the air distributor to balance the air volume of each air outlet. However, in the above technical solution, with the adjustment of the air distributor, the air outlet resistance of each air outlet will change again, that is, even if the air output of each branch main pipe is balanced by adjusting the air valve, the air output of each branch main pipe and branch pipe will become unbalanced with the adjustment of the air distributor, so that after adjusting the air distributor, the air valve needs to be fine-tuned again, which makes the air volume adjustment cycle long and the efficiency low. Summary of the invention

[0005] In view of this, the present invention provides a method for adjusting the air volume of a variable air volume air-conditioning system, which is used to solve the problem in the prior art that the air supply volume of the branch main pipe is first adjusted and then the air volume of the air outlet is adjusted, resulting in that when the air volume adjustment of the air outlet is completed, the branch main pipe is affected and needs to be adjusted again, resulting in a long adjustment cycle and low efficiency.

[0006] A method for adjusting the air volume of a variable air volume air conditioning system, the method comprises the following steps: turning on the air conditioning system and ensuring that the air valves on each branch main pipe are at the same opening and the air distributors are at the same opening; first, adjusting the air distributors on each branch main pipe in turn, so that the difference between the ratio of the actual air outlet of each air distributor on the branch main pipe to the rated air outlet and the ratio of the actual air supply volume of the branch main pipe to the rated air supply volume of the branch main pipe is within the rated difference range; after all the air distributors in the air conditioning system are adjusted, adjusting the air valves on each branch main pipe is performed, so that the difference between the ratio of the actual air supply volume of each branch main pipe to the rated air supply volume of the branch main pipe and the ratio of the actual air supply volume of a central air conditioner to the rated air supply volume of the central air conditioner is within the rated difference range.

[0007] Furthermore, before adjusting each air distributor on each branch main duct in turn, first calculate the ratio of the actual air supply volume of each branch main duct to the rated air supply volume of the branch main duct, and adjust the opening of the air distributor on each branch main duct in order from small to large according to the ratio of the actual air supply volume of the branch main duct to the rated air supply volume of the branch main duct.

[0008] Furthermore, when adjusting the opening of the air distributor on each branch main pipe in turn, the corresponding air distributor is adjusted in order from large to small according to the ratio of the actual air volume of the air outlet under the branch main pipe to the rated air volume of the air outlet.

[0009] Furthermore, when adjusting the air distributor, the opening of the air distributor is reduced until the ratio of the actual air outlet volume to the rated air supply volume of the air outlet corresponding to the air distributor and the ratio of the actual air supply volume to the rated air supply volume of the branch main pipe meet the rated difference.

[0010] Furthermore, an air volume sensor is provided on the branch main pipe to detect in real time the ratio of the actual air volume of the branch main pipe to the rated air volume.

[0011] Furthermore, after adjusting the air valve, the power of the central air conditioner is adjusted so that the actual air supply of the central air conditioner is equal to the rated air supply. The air outlet of each air outlet is detected. If the ratio of the air outlet air volume to the rated air outlet of the air outlet is less than 90%, adjustment is performed again.

[0012] Furthermore, if the ratio of the air volume of the air outlet to the rated air volume of the air outlet is less than 90%, the air distribution device corresponding to the air outlet is adjusted.

[0013] Furthermore, the rated difference satisfies that the difference between the two ratios is less than 10%.

[0014] Furthermore, when the central air conditioner is in cooling mode, the target temperature is set to satisfy a specific difference from the actual temperature.

[0015] Furthermore, the air valve and the air distributor being at the same opening degree means that the air valve and the air distributor are both in a fully open state.

[0016] The beneficial effects of the air volume adjustment method of the variable air volume air conditioning system in the present invention are: in the present invention, the air volume can be adjusted conveniently by turning on the air conditioning system, and since air is discharged all the time at this time, it is convenient and intuitive to display; by adjusting each air distributor on each branch main pipe in turn, and making the ratio of the actual air outlet of the air outlet at the position of each air distributor on the branch main pipe to the rated air outlet of the air outlet and the ratio of the actual air supply volume of the branch main pipe to the rated air supply volume of the branch main pipe satisfy the rated difference, it can ensure that the air outlets under the same branch main pipe are uniform and match the air supply volume of the branch main pipe; since the air supply volumes of each branch main pipe are different, the best Then adjust the branch main pipes to evenly match the air supply volume of the branch main pipes. Since the air outlet is adjusted by the air distributor, the air outlet capacity matches the branch main pipe. Then, when the air supply volume of the branch main pipe is balanced, the air outlet of each air outlet will naturally still match the branch main pipe and keep the total amount balanced. In other words, in the adjustment process, the repeated adjustment process is reduced, the adjustment cycle is shortened, and the adjustment efficiency is improved, thereby solving the problem of first adjusting the air supply volume of the branch main pipe and then adjusting the air volume of the air outlet in the prior art, which results in the branch main pipe being affected and needing to be adjusted again when the air volume adjustment of the air outlet is completed, resulting in a long adjustment cycle and low efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an air conditioning system on a ship in the prior art.

[0019] The meanings of the numbers in the figure are: 1. Central air conditioner; 2. Main pipeline; 21. Branch main pipe; 22. Branch pipeline; 3. Fire damper; 4. Flow sensor; 5. Air valve; 6. Air distributor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0021] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0022] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms and should not be understood as indicating or implying relative importance. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0023] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0025] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0026] In the embodiment 1 of the variable air volume air conditioning system air volume adjustment method (hereinafter referred to as the air volume adjustment method) of the present invention:

[0027] In this embodiment, reference Figure 1 The air conditioning system structure diagram is described. First, it is necessary to turn on the air conditioning system and ensure that all the air valves 5 and air distributors 6 are at the same opening. If the air outlet resistance of each part is the same, theoretically, the air volume of each air outlet will remain balanced. Due to the influence of the length, bending degree and number of bending times of the pipeline, the air volume of each air outlet is not balanced after the central air conditioner 1 is turned on, and adjustment is required at this time. Keeping the air conditioning system in working state can be adjusted by real-time detection of the air volume of the air outlet, and the adjustment process is more real and intuitive. It is worth noting that at this time, the air valves 5 and air distributors 6 are at the same opening and are both fully open, and the fully open state is convenient for adjustment. Of course, in other embodiments, the air valves 5 and air distributors 6 can also be kept at 80% opening or other openings.

[0028] The ultimate goal of air volume adjustment is to make each air outlet discharge air evenly. In order to make the air discharge even, in this embodiment, each air outlet on the same branch main pipe 21 is adjusted as a group of air outlets. First, the air outlet on each branch main pipe 21 is adjusted to have consistent air outlet capacity, and then different branch main pipes 21 are adjusted to make the branch main pipes 21 have balanced air outlets. Since the air outlet is adjusted to match the air outlet capacity of the branch main pipe 21, when the air supply of the branch main pipe 21 is increased or decreased, the air outlet will also be increased or decreased, so that the adjusted air outlet is balanced.

[0029] Specifically, before making adjustments, first calculate the ratio of the actual air supply volume of each branch trunk 21 to the rated air supply volume of the branch trunk 21, and adjust the air outlets of each branch trunk 21 in order from small to large according to the ratio of the actual air supply volume of the branch trunk 21 to the rated air supply volume of the branch trunk 21. When adjusting each air outlet under the same branch trunk 21, adjust the corresponding air distributor 6 in order from large to small according to the ratio of the actual air outlet volume of each air outlet under the branch trunk 21 to the rated air outlet volume of the air outlet. In this way, the order of adjustment is determined, thereby making the adjustment process more efficient. In this embodiment, the actual air supply volume in the branch trunk 21 is measured by a prefabricated air volume sensor in the branch trunk 21. The air volume sensor can not only be used during adjustment, but also can be monitored in real time after the adjustment is completed. Of course, in other embodiments, the adjustment order can also be adjusted for different branch trunks 21, such as from near to far or from far to near. Alternatively, in other embodiments, different air outlets under the same branch main pipe 21 can also be adjusted in other orders. Alternatively, in other embodiments, the actual air supply volume can also be adjusted by measuring the device at the air outlet, and the air volume of all air outlets under the same branch main pipe 21 is added together to obtain the air supply volume of the branch main pipe 21. The adjustment order of different air outlets under the same branch main pipe 21 in this embodiment mainly takes into account that when the air outlet with the smallest air volume is increased, it can only be increased by reducing the air distributor 6 corresponding to other air outlets under the same branch main pipe 21, thereby "squeezing" the air volume of other parts to the air outlet with smaller air volume.

[0030] During the adjustment process, when adjusting the air distributor 6, since the opening of the air distributor 6 has been adjusted to 100%, the air distributor 6 can only be adjusted to a smaller opening. During the adjustment process, the opening of the air distributor 6 needs to be adjusted until the ratio of the actual air volume and the rated air volume of the air outlet corresponding to the air distributor 6 to the actual air volume and the rated air volume of the branch trunk 21 meets the rated difference. Since the air volume of the branch trunk 21 may fluctuate slightly during the adjustment process, it does not need to be completely consistent during the adjustment process, but only needs to be within a suitable range, such as 3%, 5% or other values ​​less than 10%.

[0031] After the adjustment of the air distributor 6 is completed, the air outlet capacities of each air outlet under the same branch main duct 21 are consistent. Then the air supply volume of each branch main duct 21 is adjusted. Specifically, it is necessary to adjust the air valve 5 on the branch main duct 21 and reduce the air valve 5 so that the air outlet on each branch main duct 21 is uniform. It is worth noting that uniform air outlet does not mean that the air outlet of each branch main duct 21 is the same, but that the ratio of the actual air outlet of each air outlet on the branch main duct 21 to the rated air outlet of the air outlet meets the rated difference between the ratio of the actual air supply volume of the branch main duct 21 and the rated air supply volume of the branch main duct 21, because the number of air outlets connected to each branch main duct 21 may not be consistent.

[0032] After the adjustment is completed, it is necessary to conduct an inspection. Specifically, after the adjustment is completed, the power of the central air conditioner 1 is adjusted so that the actual air supply of the central air conditioner 1 is equal to the rated air supply. The air output of each air outlet is detected. If the ratio of the air output of the air outlet to the rated air output of the air outlet is less than 90%, then adjust again. If the ratio of the air output of the air outlet to the rated air output of the air outlet is less than 90%, adjust the air distributor 6 corresponding to the air outlet. Of course, in other embodiments, other air distributors 6 can also be adjusted to indirectly adjust the air output of the air outlet.

[0033] The main purpose of the air conditioning system is to heat or cool. In this embodiment, the air conditioning is mainly used for cooling. When the air conditioning is in cooling mode, the target temperature is set to a specific difference from the actual temperature. Specifically, the specific difference is 10 degrees Celsius. Of course, in other embodiments, the difference can also be set to other temperature differences such as 5 degrees Celsius or 8 degrees Celsius.

[0034] It should be clear that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A method for adjusting air volume of a variable air volume air conditioning system, characterized in that: Turn on the air conditioning system and ensure that all air valves on each branch main pipe are at the same opening and all air distributors are at the same opening; First, adjust each air distributor on each branch main pipe in turn so that the difference between the ratio of the actual air volume of the air outlet at the location of each air distributor on the branch main pipe to the rated air volume of the air outlet and the ratio of the actual air volume of the branch main pipe to the rated air volume of the branch main pipe is within the rated difference range; After all the air distribution devices in the air-conditioning system are adjusted, the air valves on each branch main pipe are adjusted so that the difference between the ratio of the actual air supply volume of each branch main pipe to the rated air supply volume of the branch main pipe and the ratio of the actual air supply volume of the central air conditioner to the rated air supply volume of the central air conditioner is within the rated difference range.

2. The air volume adjustment method of a variable air volume air conditioning system according to claim 1, characterized in that: Before adjusting each air distribution device on each branch main duct in turn, first calculate the ratio of the actual air supply volume of each branch main duct to the rated air supply volume of the branch main duct, and adjust the opening of the air distribution device on each branch main duct in order from small to large according to the ratio of the actual air supply volume of the branch main duct to the rated air supply volume of the branch main duct.

3. The air volume adjustment method of a variable air volume air conditioning system according to claim 2, characterized in that: When adjusting the opening of the air distribution device on each branch main pipe in turn, the corresponding air distribution device is adjusted in descending order according to the ratio of the actual air volume of the air outlet under the branch main pipe to the rated air volume of the air outlet.

4. The air volume adjustment method of a variable air volume air conditioning system according to claim 3, characterized in that: When adjusting the air distribution unit, reduce the opening of the air distribution unit until the ratio of the actual air outlet corresponding to the air distribution unit to the rated air supply volume and the ratio of the actual air supply volume of the branch main pipe to the rated air supply volume meet the rated difference.

5. The air volume adjustment method of a variable air volume air conditioning system according to any one of claims 1 to 4, characterized in that: An air volume sensor is provided on the branch main pipe to detect in real time the ratio of the actual air volume of the branch main pipe to the rated air volume.

6. The air volume adjustment method of a variable air volume air conditioning system according to any one of claims 1 to 4, characterized in that: After adjusting the air valve, adjust the power of the central air conditioner so that the actual air supply of the central air conditioner is equal to the rated air supply. Detect the air output of each air outlet. If the ratio of the air output of the air outlet to the rated air output of the air outlet is less than 90%, adjust it again.

7. The air volume adjustment method of a variable air volume air conditioning system according to claim 6, characterized in that: If the ratio of the air volume of an air outlet to the rated air volume of the air outlet is less than 90%, the air distribution device corresponding to the air outlet is adjusted.

8. The air volume adjustment method of a variable air volume air conditioning system according to any one of claims 1 to 4, characterized in that: The rated difference satisfies that the difference between the two ratios is less than 10%.

9. The air volume adjustment method of a variable air volume air conditioning system according to any one of claims 1 to 3, characterized in that: When the central air conditioner is in cooling mode, the target temperature is set to satisfy a specific difference from the actual temperature.

10. The air volume adjustment method of a variable air volume air conditioning system according to any one of claims 1 to 3, characterized in that: The air valve and the air distributor being at the same opening degree means that the air valve and the air distributor are both in a fully open state.

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