Tail end air volume adjusting system based on edge control

Abstract

The utility model discloses a terminal air volume adjusting system based on edge control, which comprises a combined air conditioning unit, an outlet of the combined air conditioning unit is connected with an air supply main pipe, the air supply main pipe is connected in parallel with a plurality of air supply branch pipes positioned in a station hall through a station hall air supply pipe, and the air supply main pipe is also connected with at least one air supply branch pipe positioned in a station through a station air supply pipe; an air supply electric air valve is arranged on the station hall air supply pipe; an inlet of the air return and exhaust fan is connected with an air return and exhaust main pipe, the air return and exhaust main pipe is connected with a plurality of air return and exhaust branch pipes in parallel through station hall air return and exhaust pipes, and the air return and exhaust main pipe is connected with at least one air return and exhaust branch pipe through a station air return and exhaust pipe; an air return electric air valve is arranged on the station hall air return and exhaust pipe; and the edge controller is in data connection with the combined air conditioning unit. The problems that in the prior art, the station hall air volume and the station air volume cannot be adjusted and controlled separately, and the control effect is poor are solved.

Description

[Technical field]

[0001] The utility model belongs to the technical field of subway energy saving, and in particular relates to a terminal air volume regulating system based on edge control. [Background technology]

[0002] With the rapid development of the rail transit industry, digitalization and intelligence are increasingly being used in urban rail transit. As the second largest energy-consuming system in the subway, the subway station ventilation and air-conditioning system has a large potential for energy saving. Digital transformation of it is conducive to the low-carbon and efficient operation of the energy system, and at the same time helps to reduce the operating costs of the subway station. Since the subway ventilation and air-conditioning system is designed to meet the ventilation and air-conditioning needs under long-term passenger flow, the actual operation has been in partial load operation for a long time. According to the actual measurement and investigation, although the current public area air conditioning wind system can achieve variable frequency, there is no zoning control for the station hall and platform. In view of the poor control effect of the subway station ventilation and air-conditioning system, more technologies are still optimized based on traditional single variable feedback control. Although it can play a certain regulatory role, due to the lack of zoning control of the platform and station hall air volume, the air supply volume is too large under low-load conditions in the station hall, resulting in unnecessary energy waste. [Contents of the utility model]

[0003] The utility model aims to provide a terminal air volume regulating system based on edge control, so as to solve the problem in the prior art that the air volumes of the station hall and the platform cannot be regulated separately and the control effect is poor.

[0004] The utility model adopts the following technical scheme: a terminal air volume adjustment system based on edge control, comprising:

[0005] A combined air conditioning unit, the outlet of which is connected to an air supply main pipe, the air supply main pipe is connected in parallel to a plurality of air supply branch pipes located in the station hall through the station hall air supply pipe, and the air supply main pipe is also connected to at least one air supply branch pipe located on the platform through the platform air supply pipe; an air supply electric damper is provided on the station hall air supply pipe;

[0006] A return exhaust fan, whose inlet is connected to a return exhaust main pipe, the return exhaust main pipe is connected to a plurality of return exhaust branch pipes in parallel through the station hall return exhaust pipe, and the return exhaust main pipe is connected to at least one return exhaust branch pipe through the platform return exhaust pipe; a return air electric damper is arranged on the station hall return exhaust pipe;

[0007] an edge controller connected to the combined air conditioning unit;

[0008] Among them, the supply air electric air valve is used to adjust the air volume of the station hall air conditioning, and the return air electric air valve is used to adjust in conjunction with the status of the supply air electric air valve.

[0009] Furthermore, at least one temperature, humidity and CO2 concentration sensor is installed in the air-conditioned area of ​​the station hall.

[0010] Furthermore, a return air temperature and humidity sensor is provided on the return and exhaust air duct in the station hall.

[0011] The beneficial effects of the utility model are as follows: it uses a combined air conditioner and a return exhaust fan as the subway ventilation and air conditioning system, and an electric air valve is provided on the air supply duct and the return exhaust duct of the station hall, which can individually control the air volume of the station hall. The system has a simple structure, high efficiency and energy saving, and strong practicality. It solves the problem in the prior art that the air volume of the station hall and the platform cannot be separately controlled, resulting in too low a temperature in the station hall under low load conditions and poor control effect. A temperature and humidity CO2 concentration sensor and a return air temperature and humidity sensor are also provided to monitor the temperature, relative humidity and carbon dioxide concentration of the station hall, so that the environmental parameters of the station hall can be grasped in real time.

Brief Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of the terminal air volume adjustment system based on edge control of the utility model.

[0013] Among them, 1. Temperature, humidity and CO2 concentration sensor, 21. Supply air main, 22. Station hall supply air duct, 23. Platform supply air duct, 24. Supply air branch pipe, 91. Return and exhaust air main, 92. Station hall return and exhaust air duct, 93. Platform return and exhaust air duct, 94. Return and exhaust air branch pipe, 3. Return air temperature and humidity sensor, 4. Supply air electric air valve, 5. Return air electric air valve, 6. Combined air conditioning unit, 7. Return and exhaust fan, 8. Edge side controller. [Specific implementation method]

[0014] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0015] The utility model provides a terminal air volume adjustment system based on edge control, such as Figure 1 As shown, it includes a combined air conditioning unit 6, a return and exhaust fan 7, a supply air electric air valve 4 and a return air electric air valve 5.

[0016] Among them, the outlet of the combined air-conditioning unit 6 is connected to an air supply main pipe 21, and the air supply main pipe 21 is connected in parallel with multiple air supply branch pipes 24 located in the station hall through the station hall air supply pipe 22. The air supply main pipe 21 is also connected to at least one air supply branch pipe 24 located on the platform through the platform air supply pipe 23; an air supply electric air valve 4 is arranged on the station hall air supply pipe 22.

[0017] The inlet of the return and exhaust fan 7 is connected to a return and exhaust air main pipe 91, and the return and exhaust air main pipe 91 is connected to multiple return and exhaust air branch pipes 94 in parallel through the station hall return and exhaust air duct 92. The return and exhaust air main pipe 91 is connected to at least one return and exhaust air branch pipe 94 through the platform return and exhaust air duct 93; a return air electric air valve 5 is arranged on the station hall return and exhaust air duct 92.

[0018] The air supply electric air valve 4 is used to adjust the air volume of the station hall air conditioner, and the return air electric air valve 5 is used to be linked and adjusted according to the state of the air supply electric air valve 4. The switch state of the valve indicates the size of the air volume. The air supply electric air valve 4 is a gear adjustment valve, which includes two-gear adjustment and three-gear adjustment.

[0019] The edge controller 8 is independently arranged near the station hall and is data-connected to the combined air conditioning unit 6. The edge controller 8 is used to collect the working state of the air supply electric damper 4, and adjust the fan operating frequency of the combined air conditioning unit 6 according to the opening and closing state of the air supply electric damper 4. When the opening degree of the air supply electric damper 4 is reduced, the fan operating frequency of the combined air conditioning unit 6 is also reduced.

[0020] During specific use, the combined air-conditioning unit 6 is installed in the air-conditioning room and connected to the fresh air, return air and supply air ducts. It is used to process the fresh air, return air or the mixed air of the two to the appropriate supply air temperature and humidity, and send it to the terminal air-conditioning area through the supply air fan and the supply air duct; the supply air fan frequency signal is connected to the edge side controller 8, and the control signal output by the edge side controller 8 is received.

[0021] The return fan is installed in the air conditioning room and connected to the return and exhaust ducts to exhaust the return air from the air conditioning area to the outdoor exhaust shaft or to the return air outlet of the air conditioning unit. The return fan frequency signal is connected to the edge side controller and receives the control signal output by the controller.

[0022] The edge side controller is installed in the integrated monitoring room and connected to the BAS system in the monitoring room. It is used to receive sensor and equipment signals, process the received data, form a control strategy, and send control signals to the actuator. The controller is embedded with time control logic, temperature start and stop control logic, and fan frequency control logic.

[0023] In specific use, the air supply electric air valve 4 can be a two-speed gear regulating valve, and the two speeds include open and closed. When the air supply electric air valve 4 is fully opened, the fan of the combined air conditioning unit 6 operates at the industrial frequency; when the air supply electric air valve 4 is fully closed, the operating frequency of the fan of the combined air conditioning unit 6 is controlled by the edge controller 8 to be 20-30Hz.

[0024] In specific use, the air supply electric air valve 4 can also be a three-speed gear regulating valve, and the three speeds include opening, stopping and closing. When the air supply electric air valve 4 is fully opened, the fan of the combined air conditioning unit 6 operates at the industrial frequency, that is, 50Hz; when the air supply electric air valve 4 is "stopped", that is, the air supply electric air valve 4 is in a half-open state, the operating frequency of the fan of the combined air conditioning unit 6 is controlled by the edge controller 8 to be 30-40Hz; when the air supply electric air valve 4 is closed, the operating frequency of the fan of the combined air conditioning unit 6 is controlled by the edge controller 8 to be 20-30Hz.

[0025] In summary, the air supply electric air valve 4 is adjusted in two gears or three gears. The two gears are respectively installed on the main pipe of the station hall air conditioning supply air duct and the main pipe of the return and exhaust air, and are used to regulate the station hall supply air volume and the return and exhaust air volume; the two gears are open (90°)-closed (180°), and the three gears are open (90°)-stop (any angle)-closed (180°). The signal is connected to the edge side controller and receives the control signal output by the controller.

[0026] In some embodiments, at least one temperature, humidity and CO2 concentration sensor 1 is provided in the air-conditioned area of ​​the station hall to monitor the temperature, relative humidity and carbon dioxide concentration of the station hall.

[0027] In some embodiments, a return air temperature and humidity sensor 3 is provided on the station hall return and exhaust air duct 92 to monitor the temperature and humidity of the station hall.

[0028] The method of using the terminal air volume adjustment system based on edge control of the utility model is: the combined air conditioning unit 6 and the return and exhaust fan 7 are used as the subway ventilation and air conditioning system, and an electric air valve is provided on the air supply duct and the return and exhaust duct of the station hall. The working state of the air supply electric air valve 4 is collected by the edge controller 8, and the fan operating frequency of the combined air conditioning unit 6 is adjusted according to the opening and closing state of the air supply electric air valve 4.

[0029] There are two specific control standards:

[0030] 1. The air supply electric air valve 4 is a two-speed gear regulating valve:

[0031] The air supply electric damper 4 is "open", and the fan of the combined air conditioning unit 6 operates at a high frequency, and the operating frequency is set to the industrial frequency of 50Hz;

[0032] The air supply electric damper 4 is "closed", and the fan of the combined air conditioning unit 6 runs at a low frequency, and the operating frequency is set to 20-30Hz.

[0033] 2. The air supply electric air valve 4 is a three-speed regulating valve with opening, stopping and closing positions:

[0034] The air supply electric damper 4 is "open", and the fan of the combined air conditioning unit 6 operates at a high frequency, and the operating frequency is set to the industrial frequency of 50Hz;

[0035] The air supply electric damper 4 is "off", and the fan operating frequency of the combined air conditioning unit 6 is set to 30-40Hz;

[0036] The air supply electric damper 4 is "closed", and the fan of the combined air conditioning unit 6 runs at a low frequency, and the operating frequency is set to 20-30Hz.

[0037] In summary, the frequency conversion control of the fan can be determined by the edge side controller according to the switch state of the electric valve in the station hall to determine whether the fan is running at high frequency or low frequency. When the electric valve in the station hall is open, the fan frequency is running at high frequency, otherwise, the fan is running at low frequency.

Claims

1. The terminal air volume adjustment system based on edge control is characterized by: include: A combined air conditioning unit (6), the outlet of which is connected to an air supply main pipe (21), the air supply main pipe (21) being connected in parallel to a plurality of air supply branch pipes (24) located in the station hall via a station hall air supply pipe (22), the air supply main pipe (21) being further connected to at least one air supply branch pipe (24) located on the platform via a platform air supply pipe (23); an air supply electric damper (4) is provided on the station hall air supply pipe (22); A return exhaust fan (7), the inlet of which is connected to a return exhaust main pipe (91), the return exhaust main pipe (91) is connected in parallel to a plurality of return exhaust branch pipes (94) via a station hall return exhaust pipe (92), the return exhaust main pipe (91) is connected to at least one return exhaust branch pipe (94) via a platform return exhaust pipe (93); a return air electric damper (5) is provided on the station hall return exhaust pipe (92); an edge controller (8) which is data-connected to the combined air conditioning unit (6); The air supply electric damper (4) is used to adjust the air volume of the station hall air conditioner, and the return air electric damper (5) is used to be adjusted in conjunction with the state of the air supply electric damper (4).

2. The terminal air volume adjustment system based on edge control according to claim 1, characterized in that: At least one temperature, humidity and CO2 concentration sensor (1) is provided in the air-conditioned area in the station hall.

3. The terminal air volume adjustment system based on edge control according to claim 1 or 2, characterized in that: A return air temperature and humidity sensor (3) is provided on the station hall return and exhaust air duct (92).

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