Fresh air pretreatment unit of central air conditioner

Abstract

The utility model relates to a fresh air pretreatment unit of a central air conditioner, which aims at solving the technical problems that the intelligent control of the whole system of the existing like products is inconvenient, and the intelligent control of corresponding sensors, alarms and regulating valves is lacked, so that the engineering transformation construction and the equipment installation construction are inconvenient. The fresh air pre-treatment unit is characterized in that the refrigerator and the heater of the fresh air pre-treatment unit are connected with cold water valves and hot water valves in all pipeline shafts of a floor through pipelines respectively, the cold water valves and the hot water valves are proportional-integral electric control valves respectively, an air supply temperature and humidity sensor is arranged at the air outlet cover, and an electric closed valve motor is arranged at the air inlet cover. The corresponding components are respectively connected with the networking type temperature controller of each room, the programmable controller in each floor and the building manager of each building through lines, the multi-split system manager and the network manager are integrally arranged in a weak current well of each floor, and the programmable controller is a central air conditioner cold and heat source group control system PLC.

Description

Technical Field

[0001] The utility model relates to a fresh air system of a central air conditioner, and is a fresh air pretreatment unit for a central air conditioner. Background Technique

[0002] The central air conditioning system consists of one or more cold and heat source systems and multiple air conditioning systems. Generally, the principle of liquid vaporization refrigeration is adopted to provide the required cooling capacity for the air conditioning system to offset the heat load of the indoor environment; the heating system provides the required heat for the air conditioning system to offset the cold load of the indoor environment. The refrigeration system is a crucial part of the central air conditioning system, while the fresh air system is the main terminal air conditioning system of the central air conditioner, mainly composed of fan coil units and air handling units distributed in each end room on each floor of each building, energy balance valves in each pipeline shaft of each floor, and building managers in the weak current shaft. Among them, the structure of the air handling unit of the existing central air conditioning system is as disclosed in the Chinese patent document with the application number 202320852609.6, the authorization announcement date of December 8, 2023, and the utility model name "A brand-new fresh air split direct expansion variable frequency heat recovery purification central air conditioner"; and also as disclosed in the Chinese patent document with the application number 201710950909.7, the application publication date of November 16, 2018, and the invention name "A fresh air handling unit for reducing reheating energy consumption under refrigeration conditions". However, the overall system intelligent control of the above products and similar products is relatively inconvenient, lacking the intelligent control of corresponding sensors, alarms, and regulating valves, resulting in inconvenient engineering renovation construction and equipment installation construction. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the utility model is to provide a fresh air pretreatment unit for a central air conditioner to the art, so as to solve the technical problems that the overall system intelligent control of existing similar products is relatively inconvenient, lacking the intelligent control of corresponding sensors, alarms, and regulating valves, resulting in inconvenient engineering renovation construction and equipment installation construction. Its purpose is achieved through the following technical solutions.

[0004] A fresh air pre-treatment unit for a central air conditioner. On one side of the air inlet of the fresh air pre-treatment unit, there are successively an air inlet hood, a filter screen, and a fan coil unit. On the other side, at the air outlet, there are an air outlet hood and a filter hood. A cooler and a heater are arranged between the fan coil unit and the filter hood. It is characterized in that the cooler and the heater are respectively connected to the cold water valve and the hot water valve in each pipeline well of each floor through pipelines. The cold water valve and the hot water valve are respectively proportional integral electric regulating valves. A supply air temperature and humidity sensor is arranged at the air outlet hood, and an electric airtight valve motor is arranged at the air inlet hood. The electric airtight valve motor, the cold water valve, the hot water valve, the supply air temperature and humidity sensor, the electric control box of the fan coil unit, the first filter clogging alarm of the filter hood, and the second filter clogging alarm of the filter screen are respectively connected to the networked temperature controller in each room, the programmable controller in each floor, and the building manager in each building through wires. The multi-line air conditioner system manager and the network manager are integrally arranged in the weak current well of each floor. The programmable controller is the PLC of the central air conditioner cold and heat source group control system. Thus, the intelligent energy-saving control system of the central air conditioner is connected through the programmable controller, and the temperature in each room of each building and each floor, as well as the temperature and humidity data inside and outside the room, are intelligently regulated according to various data, achieving the purpose of energy conservation and emission reduction.

[0005] The cooler and the heater are arranged in the same chamber, and a maintenance door or an equalizing plate is arranged in the channel between the chamber and the fan coil unit. The above structure is for the convenience of maintaining the fresh air pre-treatment unit and further equalizing the air flow.

[0006] The electric control box of the fan coil unit is respectively provided with four wirings for fan start / stop control, fan operation status, fan fault alarm, and fan manual / automatic. The above structure facilitates the wiring of the fan coil unit.

[0007] The networked temperature controller includes wiring for neutral wire, live wire, valve control, low gear, medium gear, high gear, 485A, 485B, and GND. The wiring for neutral wire, live wire, valve control, low gear, medium gear, and high gear of the networked temperature controller are respectively connected to the wiring for neutral wire, live wire, electric airtight valve motor, low gear, medium gear, and high gear of the fan coil unit. The wiring for 485A and 485B of the networked temperature controller are respectively and simultaneously connected to one RS485 downlink communication of the building manager and the RS485 downlink communication wiring of another networked temperature controller. The other RS485 downlink communication wiring of the building manager is respectively connected to the RS485 uplink communication wiring of another networked temperature controller. The other two RS485 uplink communication wirings of the building manager are respectively connected to the wiring of a network manager and another building manager. The above structure facilitates the wiring and installation of the networked temperature controller, the building manager, and the network manager, and is connected to the programmable controller.

[0008] The building manager is connected to the programmable controller through the network manager, and the multi-connected system managers of each building are connected to the programmable controller through lines. Another multi-connected system manager is provided in the programmable controller.

[0009] The structure of the present utility model is reasonably designed, facilitating engineering transformation construction and equipment installation construction, especially the wiring installation of corresponding equipment. It is suitable for use as a fresh air pretreatment unit for central air conditioners and the structural improvement of similar products. Brief Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the structure and wiring of the present utility model.

[0011] Figure 2 is Figure 1 a schematic diagram of the wiring between the fan coil unit and the networked thermostat.

[0012] Figure 3 is Figure 2 a schematic diagram of the wiring of the building manager.

[0013] Reference Numerals and Names of the Drawings: 1. Air inlet hood, 2. Filter screen, 3. Fan coil unit, 4. Inspection door, 5. Refrigerator, 6. Heater, 7. Filter cover, 8. Air outlet hood, 9. Supply air temperature and humidity sensor, 10. Programmable controller, 11. First filter clogging alarm, 12. Electric control box, 13. Second filter clogging alarm, 14. Electrically controlled airtight valve motor, 15. Networked thermostat, 16. Building manager. Detailed Embodiment

[0014] Now, in conjunction with the drawings, the structure and use of the present utility model will be further described. As Figures 1 - 3 shown, on one side of the air inlet of the fresh air pretreatment unit, there are successively an air inlet hood 1, a filter screen 2, and a fan coil unit 3. On the other side of the air outlet, there are an air outlet hood 8 and a filter cover 7. A refrigerator 5 and a heater 6 are provided between the fan coil unit and the filter cover. The refrigerator and the heater are respectively connected to the cold water valve and the hot water valve in each floor's pipe well through pipelines. The cold water valve and the hot water valve are respectively proportional integral electric control valves. A supply air temperature and humidity sensor 9 is provided at the air outlet hood, and an electrically controlled airtight valve motor 14 is provided at the air inlet hood. The electrically controlled airtight valve motor, the cold water valve, the hot water valve, the supply air temperature and humidity sensor, and the electric control box 12 of the fan coil unit, the first filter clogging alarm 11 of the filter cover, and the second filter clogging alarm 13 of the filter screen are respectively connected to the networked thermostat 15 in each room, the programmable controller 10 in each floor, and the building manager 16 of each building through lines. The multi-connected system manager and the network manager are integrally arranged in the weak current well of each floor. The programmable controller is a PLC for the central air conditioning cold and heat source group control system.

[0015] The above-mentioned cooler and heater are arranged in the same chamber, and a maintenance door 4 or a flow equalizing plate is provided in the passage between the chamber and the fan coil unit. The electric control box of the fan coil unit is respectively provided with four wirings for fan start / stop control, fan operating status, fan fault alarm, and fan manual / automatic control. The networked thermostat includes neutral wire, live wire, valve control, low gear, medium gear, high gear, 485A, 485B, and GND wirings. The neutral wire, live wire, valve control, low gear, medium gear, and high gear wirings of the networked thermostat are respectively connected to the neutral wire, live wire, motor of the electrically controlled shut-off valve, low gear, medium gear, and high gear wirings of the fan coil unit. The 485A and 485B wirings of the networked thermostat are respectively and simultaneously connected to a RS485 downlink communication of the building manager and the RS485 downlink communication wiring of another such networked thermostat. The other RS485 downlink communication wiring of the building manager is respectively connected to the RS485 uplink communication wiring of another such networked thermostat. The other two RS485 uplink communication wirings of the building manager are respectively connected to the wiring of a network manager and another building manager. The building manager is connected to the intelligent energy-saving control system of the central air conditioner through the network manager, and the multi-line system managers of each building are connected to the programmable logic controller through lines, and the programmable logic controller is provided with another multi-line system manager.

[0016] After the above-mentioned structural wiring and equipment installation are completed, the programmable logic controller is connected to the intelligent energy-saving control system of the central air conditioner. The central air conditioner of this intelligent energy-saving control system includes an air-cooled heat pump host, a cold and hot circulating pump, an air handling unit, a fan coil unit, a manifold, and related pipes. The air-cooled heat pump host generates cooling and heating energy, which is transmitted to the water distributor through the cold and hot circulating pump, and then sent to the fan coil unit and the air processor. The air-cooled heat pump dissipates the room heat into the atmosphere through air cooling. This intelligent energy-saving control system also includes a cold and hot water circulation system, an air-cooled heat pump host system, and the terminal air conditioning systems of the fan coil units in the above-mentioned rooms. This intelligent energy-saving control system is remotely controlled through mobile phones and servers, and locally controlled through a management computer. Each system of this intelligent energy-saving control system includes a floor energy balance sub-station, an energy meter system manager, and a multi-line system manager. The floor energy balance sub-stations are respectively connected to the supply and return water temperature, pressure, and corresponding temperature sensors and pressure sensors through proportional-integral electric control valves. The proportional-integral electric control valves are installed on each branch of the water distributor and the terminal floor pipe wells.

Claims

1. A fresh air pre-treatment unit for a central air conditioner. On one side of the air inlet of the fresh air pre-treatment unit, there are successively an air inlet hood (1), a filter screen (2) and a fan coil unit (3). On the other side, at the air outlet, there are an air outlet hood (8) and a filter hood (7). Between the fan coil unit and the filter hood, there are a cooler (5) and a heater (6); characterized in that The cooler (5) and the heater (6) are respectively connected to the cold water valves and hot water valves in the pipe shafts of each floor through pipelines. The cold water valves and hot water valves are respectively proportional-integral electric control valves. A supply air temperature and humidity sensor (9) is provided at the air outlet hood (8), and an electric airtight valve motor (14) is provided at the air inlet hood (1). The electric airtight valve motor, the cold water valve, the hot water valve, the supply air temperature and humidity sensor, the electric control box (12) of the fan coil unit, the first filter clogging alarm (11) of the filter hood, and the second filter clogging alarm (13) of the filter screen are respectively connected to the networked thermostat (15) of each room, the programmable controller (10) in each floor, and the building manager (16) of each building through lines. The multi-connected air conditioner system manager and the network manager are integrally arranged in the weak current well of each floor. The programmable controller is the PLC of the central air-conditioning cold and heat source group control system.

2. The fresh air pre-treatment unit of the central air conditioner according to claim 1, characterized in that The cooler (5) and the heater (6) are arranged in the same chamber, and a maintenance door (4) or a flow equalizing plate is provided in the channel between the chamber and the fan coil unit (3).

3. The fresh air pre-treatment unit of the central air conditioner according to claim 1, characterized in that The electric control box (12) of the fan coil unit (3) is respectively provided with four wirings for fan start-stop control, fan running state, fan fault alarm, and fan manual / automatic operation.

4. The fresh air pre-treatment unit of the central air conditioner according to claim 1, characterized in that The networked thermostat (15) includes wiring for neutral wire, live wire, valve control, low gear, medium gear, high gear, 485A, 485B, and GND. The wiring for neutral wire, live wire, valve control, low gear, medium gear, and high gear of the networked thermostat are respectively connected to the neutral wire, live wire, electric airtight valve motor (14), low gear, medium gear, and high gear of the fan coil unit (3). The 485A and 485B wirings of the networked thermostat are respectively and simultaneously connected to a RS485 downlink communication of the building manager (16) and the RS485 downlink communication of another networked thermostat. The other RS485 downlink communication wiring of the building manager is respectively connected to the RS485 uplink communication wiring of another networked thermostat. The other two RS485 uplink communication wirings of the building manager are respectively connected to the wiring of a network manager and another building manager.

5. The fresh air pre-treatment unit for central air-conditioning according to claim 1, characterized in that The building manager (16) is connected to the programmable controller (10) through the network manager, and the multi-connected air conditioner system manager of each building is connected to the programmable controller (10) through lines. The programmable controller is provided with another multi-connected air conditioner system manager.

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