Central air conditioning energy-saving control system based on green correction amount

Abstract

The utility model discloses a central air conditioning energy -conserving control system based on green correction quantity, including energy -conserving controller, environment detection sensor, air conditioner hot water module, air conditioner cold water module, frequency conversion module, fan module, water pressure adjusting module, the water circulation in air conditioner is formed through water pressure adjusting module between air conditioner hot water module and air conditioner cold water module, and the data exchange is carried out with air conditioner hot water module and air conditioner cold water module through host control line of energy -conserving controller, and frequency conversion module is used for the pump in air conditioner hot water module and air conditioner cold water module and carries out the regulation and control, and is electrically connected between control line and energy -conserving controller, and the water circulation connection is formed through pipeline between fan module top of water pressure adjusting module and between, the utility model discloses through the integration control of air conditioner refrigeration and heating, can automatically according to environmental condition change to air conditioner temperature carries out the regulation and control, prevents due to in seasonal change day and night temperature difference increase, and system can not automatically adjust parameter to lead to the energy loss condition.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning energy-saving technology, specifically a central air conditioning energy-saving control system based on green correction. Background Technology

[0002] Despite continuous development in central air conditioning systems, with new main units employing magnetic levitation and variable speed control technologies and placing greater emphasis on low power consumption and high efficiency, central air conditioning systems remain a major energy consumer for various organizations, urgently requiring further reductions in their energy consumption. Existing central air conditioning systems generally consist of two parts: 1. In winter, various types of pressurized and unpressurized boilers generate primary high-temperature hot water, which is then used to generate secondary hot water through heat exchangers and supplied to room coil fans for heating. 2. In summer, various types of chiller units are used with various cooling towers to dissipate heat from the condenser, and the chilled water output from the evaporator enters the room through the coil fan to cool the room.

[0003] Current air conditioning systems have the following three shortcomings and deficiencies in terms of energy management.

[0004] 1. The outlet and return water temperatures of the chiller unit, as well as the upper and lower limits of the hot water supply for the air conditioning boiler, are manually adjusted and set, which introduces considerable arbitrariness. This makes it difficult to match actual needs during seasonal temperature fluctuations, easily leading to energy waste.

[0005] 2. The air conditioning control relies on intrinsic factors such as the temperature difference between the inlet and outlet water and the condenser pressure, without incorporating environmental variables and user needs. Especially when the temperature difference between day and night increases with seasonal changes, the system cannot automatically adjust parameters, resulting in significant energy loss.

[0006] 3. Air conditioning cooling and heating are two different control systems. After seasonal changes, resources such as frequency converters and sensors cannot be shared. Utility Model Content

[0007] To address the aforementioned issues, this utility model provides a central air conditioning energy-saving control system based on green correction, comprising an energy-saving controller, an environmental monitoring sensor, an air conditioning hot water module, an air conditioning chilled water module, a frequency converter, a fan module, and a water pressure regulating module. The environmental detection sensor senses the environmental conditions and transmits the data to the energy-saving controller; the air conditioning hot water module and the air conditioning chilled water module form an internal water circulation in the air conditioner through the water pressure regulating module; the energy-saving controller exchanges data with the air conditioning hot water module and the air conditioning chilled water module respectively through the host control line; the frequency converter module is used to regulate the pumps in the air conditioning hot water module and the air conditioning chilled water module, and is electrically connected to the energy-saving controller through the control line; the water pressure regulating module is connected to the fan module above through a pipe to form a water circulation connection.

[0008] Furthermore, the environmental detection sensor specifically includes: an end sensor, a temperature and humidity sensor, a brightness detector, and an air temperature detector.

[0009] Furthermore, the air conditioning hot water module specifically includes: an air conditioning hot water unit, an air conditioning hot water boiler, a water circulation pump, and an air conditioning plate heat exchanger; water flows through the air conditioning plate heat exchanger and is fed into the air conditioning hot water boiler for heating, and the heated water flows out through the air conditioning plate heat exchanger after passing through the water circulation pump once; the air conditioning hot water unit is installed on the air conditioning hot water boiler and exchanges data with the energy-saving controller through the main unit control line.

[0010] Furthermore, the air conditioning chilled water module specifically includes: an air conditioning chiller unit, an air conditioning chiller chiller unit, an air conditioning chiller unit cooling water pump, an air conditioning chilled water circulation pump, and a cooling tower; the air conditioning chiller unit is installed on the air conditioning chiller chiller unit and exchanges data with the energy-saving controller through a host control line; the air conditioning chilled water module has two water flow links: After the water flows out of the water pressure regulating module, it enters the air conditioning chiller unit and is then output to the water pressure regulating module via the air conditioning chilled water circulation pump. The water flows sequentially through the air conditioning chiller unit, the air conditioning unit cooling water pump, and the cooling tower before flowing back into the air conditioning chiller unit, forming a water circulation.

[0011] Furthermore, the frequency conversion module specifically includes: a cooling pump frequency converter, a circulating pump frequency converter, and a cooling tower frequency converter.

[0012] Furthermore, the water pressure regulating module specifically includes: a water distributor, a water pressure regulating valve, and a water return device; the fan module contains multiple air conditioning fans; The water flow is divided into multiple parts by the water distributor and then flows through multiple air conditioning fans before being collected in the return water device; the water distributor and the return water device are connected by a pipe, and the water pressure regulating valve is installed on the pipe to regulate the water pressure.

[0013] Furthermore, it also includes multiple water valves; the multiple water valves are respectively installed on the air conditioning hot water module and the air conditioning cold water module, and the multiple water valves are all electrically connected to the energy-saving controller through control lines.

[0014] Furthermore, it also includes a temperature and pressure measurement module, which is installed on the water pressure regulation module to monitor the temperature and pressure of the water distribution flow and the return flow, and transmit the monitoring data to the energy-saving controller via a data cable.

[0015] This utility model provides a central air conditioning energy-saving control system based on green correction, which has the following beneficial effects: This invention integrates the cooling and heating functions of an air conditioner, automatically adjusting the temperature according to changes in environmental conditions. This prevents significant energy loss caused by the system's inability to automatically adjust parameters when the temperature difference between day and night increases during seasonal changes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the system structure provided by this utility model; Figure 2 This is a schematic diagram of the structure of the air conditioning hot water module provided by this utility model; Figure 3 This is a schematic diagram of the air conditioning chilled water module provided by this utility model.

[0018] In the diagram, the components are: 1. Energy-saving controller; 2. Environmental monitoring sensor; 3. Air conditioning hot water module; 4. Air conditioning chilled water module; 5. Variable frequency module; 6. Fan module; 7. Water pressure regulating module; 8. Water valve; 31. Air conditioning hot water boiler; 32. Water circulation pump; 33. Air conditioning plate heat exchanger; 34. Air conditioning hot water unit; 41. Air conditioning chiller unit; 42. Air conditioning unit cooling water pump; 43. Air conditioning chilled water circulation pump; 44. Cooling tower; 45. Air conditioning chiller unit. Detailed Implementation

[0019] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] The following detailed description of the implementation method of this utility model is provided in conjunction with the accompanying drawings. The description only covers some embodiments and not all embodiments. For clarity, representations and descriptions unrelated to this utility model are omitted from the drawings and description.

[0021] To provide a clearer understanding of the technical features, objectives, and beneficial effects of this utility model, the following detailed description of the technical solution is provided. Obviously, the described embodiments are only a portion of the embodiments of this utility model, not all of them, and should not be construed as limiting the scope of implementation of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1As shown, this utility model provides a central air conditioning energy-saving control system based on green correction, including an energy-saving controller 1, an environmental detection sensor 2, an air conditioning hot water module 3, an air conditioning chilled water module 4, a frequency converter 5, a fan module 6, and a water pressure regulating module 7. The environmental detection sensor 2 senses the environmental conditions and transmits the data to the energy-saving controller 1; the air conditioning hot water module 3 and the air conditioning cold water module 4 form an internal water circulation in the air conditioner through the water pressure regulating module 7; the energy-saving controller 1 exchanges data with the air conditioning hot water module 3 and the air conditioning cold water module 4 respectively through the host control line; the frequency converter module 5 is used to regulate the pumps in the air conditioning hot water module 3 and the air conditioning cold water module 4, and is electrically connected to the energy-saving controller 1 through the control line; the water pressure regulating module 7 is connected to the fan module 6 through a pipe to form a water circulation connection.

[0023] Environmental monitoring sensors 2 specifically include: end-point sensors, temperature and humidity sensors, brightness detectors, and air temperature detectors. The sensor cluster is responsible for comprehensively and accurately collecting various relevant indoor and outdoor data, such as temperature, humidity, and light intensity. These sensors are distributed in different locations to obtain broader and more accurate environmental information. The data acquisition network efficiently aggregates and transmits the data collected by the sensor cluster. It has stable and reliable transmission performance, ensuring that data is not lost or delayed during transmission, providing a solid data foundation for subsequent modeling and calculations, enabling the entire air conditioning energy-saving system to perform intelligent control based on accurate and timely data.

[0024] The energy-saving controller 1 features a visual control interface, providing operators with an intuitive and convenient way to operate the system. Through this technology, operators can easily view various operating parameters of the air conditioning system, such as temperature, humidity, and fan speed, on the human-machine interface, and flexibly adjust the system according to actual needs. This greatly improves the system's operability and management efficiency, enabling even non-professionals to quickly learn and accurately operate the air conditioning energy-saving system. The energy-saving controller 1 incorporates a green correction algorithm, which intelligently regulates the air conditioning based on environmental conditions.

[0025] The air conditioning hot water module 3 specifically includes: an air conditioning hot water unit 34, an air conditioning hot water boiler 31, a water circulation pump 32, and an air conditioning plate heat exchanger 33; water flows through the air conditioning plate heat exchanger 33 and is fed into the air conditioning hot water boiler 31 for heating, and the heated water flows through the water circulation pump 32 once and then flows out through the air conditioning plate heat exchanger 33; the air conditioning hot water unit 34 is installed on the air conditioning hot water boiler 31 and exchanges data with the energy-saving controller 1 through the host control line.

[0026] The air conditioning chilled water module 4 specifically includes: an air conditioning chiller unit 45, an air conditioning chiller unit 41, an air conditioning unit cooling water pump 42, an air conditioning chilled water circulation pump 43, and a cooling tower 44; the air conditioning chiller unit 45 is installed on the air conditioning chiller unit 4 and exchanges data with the energy-saving controller 1 through the host control line; there are two water flow links in the air conditioning chilled water module 4: water flows out from the water pressure regulating module 7 and enters the air conditioning chiller unit 41, and then is output to the water pressure regulating module 7 via the air conditioning chilled water circulation pump 43; the water flows sequentially through the air conditioning chiller unit 41, the air conditioning unit cooling water pump 42, and the cooling tower 44 before flowing back into the air conditioning chiller unit 41, forming a water circulation.

[0027] The air conditioning hot water unit, air conditioning chiller unit, and energy-saving controller utilize 5G cloud configuration networking control technology, fully leveraging the high speed and low latency characteristics of the 5G network to achieve remote monitoring and configuration control of the air conditioning energy-saving system. Through this technology, managers can monitor and control the air conditioning system in real time from any location and at any time, without needing to be on-site. Simultaneously, 5G cloud configuration networking control technology also supports centralized management and collaborative operation of multiple devices and systems, making the entire air conditioning system operate more efficiently and intelligently.

[0028] The frequency converter module 5 specifically includes: a cooling pump frequency converter, a circulating pump frequency converter, and a cooling tower frequency converter.

[0029] The water pressure regulating module 7 specifically includes: a water distributor, a water pressure regulating valve, and a water return device; the fan module 6 contains multiple air conditioning fans; The water flow is divided into multiple parts by the water distributor and then flows through multiple air conditioning fans before being collected in the return water device; the water distributor and the return water device are connected by a pipe, and the water pressure regulating valve is installed on the pipe to regulate the water pressure.

[0030] It also includes multiple water valves 8; the multiple water valves 8 are respectively installed on the air conditioning hot water module 3 and the air conditioning cold water module 4, and the multiple water valves 8 are all electrically connected to the energy-saving controller 1 through control lines.

[0031] It also includes a temperature and pressure measurement module, which is installed on the water pressure regulation module to monitor the temperature and pressure of the water flow and the return flow, and transmit the monitoring data to the energy-saving controller 1 via a data cable.

[0032] Example: Basic data of this central air conditioning system. 150 tons of hot water for air conditioning, 600 fan coil units. The upper limit of the hot water boiler is set at 40 degrees Celsius, and the lower limit is 35 degrees Celsius. This is a central air conditioning system currently operating in winter heating mode.

[0033] Energy consumption scenario for 10 hours without using green correction: The thermodynamic formula for gas consumption, operating 600 fans under continuous heat load. Maintaining 150 tons of water at 40 degrees Celsius, but the water is circulated. Therefore, the boiler actually needs to maintain the water temperature at 40 degrees Celsius, while the fan coil units are constantly cooling the water. To maintain the water temperature, the boiler must match the heat removed by the fan coil units.

[0034] Therefore, the problem boils down to calculating the rate at which the fan coil unit removes heat.

[0035] Since there are 600 fan coil units, we need to know the thermal power of each fan.

[0036] Assume the thermal power of each fan coil unit. Typically, a single fan coil unit in a commercial building might provide 1-10 kW of heat, depending on size. 600 units could represent a large building, such as an office building or shopping mall. Assuming an average thermal power of 2 kW per fan coil unit, the total thermal power would be 600 * 2 = 1200 kW. If water is circulating and the supply and return water temperature difference is ΔT, then the thermal power Q = m_dot * c * ΔT, where m_dot is the mass flow rate. While "150 tons" refers to mass flow rate, i.e., 150 ton / h, a ton is a unit of mass, while flow rate is commonly used in fluids. / h or kg / h. 1 ton of water = 1000 kg, so 150 tons of water = 150,000 kg. But if this is mass flow rate, i.e., 150 ton / h = 150,000 kg / h, then the mass flow rate m_dot = 150,000 kg / h. Then the heat power Q = m_dot * c * ΔT. But ΔT is unknown. In air conditioning systems, the typical supply and return water temperature difference for hot water systems is 10-20°C. For example, if the supply water is 40°C and the return water is 30°C, then ΔT = 10°C. Then Q = 150,000 kg / h * 4.18 kJ / kg°C * 10°C = 150,000 * 4.18 * 10 kJ / h.

[0037] Therefore, for a water flow rate of 150 tons, ΔT = 10°C, and 10 hours of operation, approximately 1833 m³ is required. 3 natural gas.

[0038] The statement "maintaining 150 tons of hot water for air conditioning at 40 degrees Celsius" does not mention the return water temperature, so ΔT is unknown.

[0039] However, from the perspective of the fan coil unit load, ΔT is determined by the heat load and flow rate.

[0040] Since there are 600 fan coil units, we can estimate the temperature using their heat load. Based on previous calculations, each of the 600 fans is 3 kW, so Q = 1800 kW. Then, when the mass flow rate m_dot = 150,000 kg / h, ΔT = Q / (m_dot * c) = 1800 kW / (150,000 kg / h * 4.18 kJ / kg°C), we can derive ΔT ≈ 10.3°C, consistent with the assumption. Therefore, using ΔT = 10°C is reasonable.

[0041] Final answer: Approximately 1833 cubic meters of natural gas are needed to operate for 10 hours.

[0042] Energy consumption analysis of the green correction energy-saving controller over 10 hours: During this period, due to increased temperature, ample sunlight, and changes in 11 related parameters including room occupancy rate, humidity, air pressure, terminal temperature, and time, all conducive to energy conservation, the central air conditioning energy-saving control system performs joint calculations using multiple algorithm modes on the collected data variables, obtaining a green correction of -2. The energy-saving controller then inputs and superimposes this green correction, along with its algebraic sum, onto the original upper limit set for the air conditioning boiler.

[0043] After the green correction factor is applied, the upper limit of the water temperature is automatically reduced from 40 degrees Celsius to 38 degrees Celsius: supply water 38°C, return water 30°C. At this time, due to the rising air temperature, ample sunshine, and low occupancy rate, the heat dissipation of the duct fan decreases. With 150 tons of air conditioning water accumulating a large amount of heat, a new temperature difference between the supply and return water occurs. = 38°C - 30°C = 8°C. Heat load change ratio = 8°C / 10°C = 0.8; Natural gas consumption = 1834 m³ 3 × 0.8 ≈ 1467 .

[0044] The green correction control system automatically reduces the boiler water temperature from 40°C to 38°C. The impact on natural gas consumption depends entirely on the changes in the green correction and the boiler's operating status controlled by the energy-saving system, particularly the change in return water temperature. If the return water temperature remains constant (e.g., always at 30°C): this means the supply and return water temperature difference decreases from 10°C to 8°C. The system's heat load and natural gas consumption will decrease by 20%. Natural gas consumption drops to approximately 1467 kJ / L. (Running for 10 hours). This is the most typical energy-saving scenario.

[0045] The boiler's control panel displays real-time supply and return water temperatures. The supply water temperature is automatically set to 38°C. After running stably for a period of time, observe the return water temperature. If the return water temperature decreases compared to the original value, and the supply and return water temperature difference decreases, it indicates that natural gas is being saved.

[0046] The most accurate conclusion is that, while maintaining the same indoor heating effect and unchanged human comfort, optimizing the control through green correction (which typically increases the return water temperature or reduces the temperature difference) to lower the supply water temperature from 40°C to 38°C is expected to save 10% to 20% of natural gas consumption. In this case study, the gas consumption over 10 hours might decrease from 1834 kWh. dropped to 1467 It saves approximately 377 cubic meters of natural gas.

[0047] This invention integrates the cooling and heating functions of an air conditioner, automatically adjusting the temperature according to changes in environmental conditions. This prevents significant energy loss due to the system's inability to automatically adjust parameters when the temperature difference between day and night increases with seasonal changes.

[0048] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A central air conditioning energy-saving control system based on green correction, characterized in that, It includes an energy-saving controller (1), an environmental monitoring sensor (2), an air-conditioning hot water module (3), an air-conditioning chilled water module (4), a frequency converter module (5), a fan module (6), and a water pressure regulating module (7). The environmental detection sensor (2) senses the environmental conditions and transmits them to the energy-saving controller (1); the air conditioning hot water module (3) and the air conditioning cold water module (4) form an internal water circulation in the air conditioner through the water pressure regulating module (7); the energy-saving controller (1) exchanges data with the air conditioning hot water module (3) and the air conditioning cold water module (4) respectively through the host control line; the frequency converter module (5) is used to regulate the pumps in the air conditioning hot water module (3) and the air conditioning cold water module (4), and is electrically connected to the energy-saving controller (1) through the control line; the water pressure regulating module (7) and the fan module (6) are connected to form a water circulation connection through the pipe.

2. The central air conditioning energy-saving control system based on green correction as described in claim 1, characterized in that, The environmental detection sensor (2) specifically includes: a terminal sensor, a temperature and humidity sensor, a brightness detector, and a temperature detector.

3. The central air conditioning energy-saving control system based on green correction as described in claim 1, characterized in that, The air conditioning hot water module (3) specifically includes: an air conditioning hot water unit (34), an air conditioning hot water boiler (31), a water circulation pump (32), and an air conditioning plate heat exchanger (33); water flows through the air conditioning plate heat exchanger (33) and into the air conditioning hot water boiler (31) for heating, and the heated water flows through the water circulation pump (32) once and then flows out through the air conditioning plate heat exchanger (33); the air conditioning hot water unit (34) is installed on the air conditioning hot water boiler (31) and exchanges data with the energy-saving controller (1) through the main unit control line.

4. The central air conditioning energy-saving control system based on green correction as described in claim 1, characterized in that, The air conditioning chilled water module (4) specifically includes: air conditioning chiller (45), air conditioning chiller unit (41), air conditioning unit cooling water pump (42), air conditioning chilled water circulation pump (43), and cooling tower (44); the air conditioning chiller (45) is installed on the air conditioning chiller unit (41) and exchanges data with the energy-saving controller (1) through the host control line; There are two water flow paths in the air conditioning chilled water module (4): After the water flows out of the water pressure regulating module (7), it enters the air conditioning chiller unit (41) and is then output to the water pressure regulating module (7) via the air conditioning chilled water circulation pump (43). The water flows through the air conditioning chiller (41), the air conditioning unit cooling water pump (42), and the cooling tower (44) in sequence before flowing back into the air conditioning chiller (41), forming a water circulation.

5. The central air conditioning energy-saving control system based on green correction as described in claim 1, characterized in that, The frequency conversion module (5) specifically includes: a cooling pump frequency converter, a circulating pump frequency converter, and a cooling tower frequency converter.

6. The central air conditioning energy-saving control system based on green correction as described in claim 1, characterized in that, The water pressure regulating module (7) specifically includes: a water distributor, a water pressure regulating valve, and a water return device; the fan module (6) contains multiple air conditioning fans; The water flow is divided into multiple parts by the water distributor and then flows through multiple air conditioning fans before being collected in the return water device; the water distributor and the return water device are connected by a pipe, and the water pressure regulating valve is installed on the pipe to regulate the water pressure.

7. The central air conditioning energy-saving control system based on green correction as described in claim 1, characterized in that, It also includes multiple water valves (8); the multiple water valves (8) are respectively installed on the air conditioning hot water module (3) and the air conditioning cold water module (4), and the multiple water valves (8) are all electrically connected to the energy-saving controller (1) through control lines.

8. The central air conditioning energy-saving control system based on green correction as described in claim 1, characterized in that, It also includes a temperature and pressure measurement module, which is installed on the water pressure regulation module to monitor the temperature and pressure of the water flow and the return flow respectively, and transmit the monitoring data to the energy-saving controller (1) through the data line.

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