Intelligent hydraulic balance device and air conditioner water system

Abstract

The utility model relates to the technical field of air conditioners, and discloses an intelligent hydraulic balance device and an air conditioner water system. Comprising a water supply branch, a water return branch, end equipment, an electric two-way valve, a flow sensor and an electric control valve. The opening state of each electric two-way valve represents that a design flow is needed, and the summary flow of the branch is calculated. Meanwhile, the flow sensor monitors the flow in real time, the collected flow is compared with the flow monitored in real time, the electric adjusting valve is adjusted, the flow flowing through the branch corresponds to the set flow, and therefore the problem of hydraulic imbalance is solved. In addition, a temperature sensor installed on a branch of the water supply / return pipe monitors the temperature of water supply and return in real time, and the two temperature values are calculated to obtain a real-time temperature difference value; if the real-time temperature difference value is lower than the set temperature difference value, the valve opening degree of the electric adjusting valve is adjusted preferentially based on the temperature difference, the real-time temperature difference value is made to be higher than the set temperature difference value, the large-flow small-temperature-difference phenomenon is eradicated, water flow is made to conduct sufficient heat exchange, and heat exchange is conducted in a high-efficiency interval.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an intelligent hydraulic balancing device and an air conditioning water system. Background Art

[0002] The water in the water system is pumped to each terminal device on each floor for heat exchange, and the water after heat exchange flows to the main unit through the return pipe. Usually, a static balancing valve or a self-supporting differential pressure regulating valve is installed on each cold / hot water branch to solve the problem of hydraulic imbalance. Hydraulic imbalance refers to the phenomenon of uneven water flow distribution due to changes in resistance along the way and terminal load. Usually, the water flow at the terminal close to the water pump exceeds the required flow, and the water flow at the far end is insufficient, which leads to a systematic phenomenon of large flow and small temperature difference, resulting in energy waste. Usually, the debugging and balancing of static balancing valves is very cumbersome, requiring professional staff to debug step by step, and requiring high technical level of later operation and maintenance personnel. In addition, static balancing valves cannot cope with dynamic hydraulic imbalance. Compared with static balancing valves, self-supporting differential pressure regulating valves are slightly simpler to debug, and can also cope with dynamic hydraulic imbalance. However, self-supporting differential pressure regulating valves cannot really solve the phenomenon of large flow and small temperature difference, but only play a certain balancing role in hydraulic imbalance. The water flow demand is different in winter and summer, and secondary debugging is required on site. In addition, the terminal energy consumption of conventional measures is not transparent, the energy consumption of the entire system is not clear, and the building automatic control system cannot be used for energy consumption analysis, energy-saving optimization, and fault diagnosis. Utility Model Content

[0003] In view of the above-mentioned defects in the prior art, an intelligent hydraulic balancing device and air-conditioning water system are provided, which can greatly reduce the debugging time to achieve balance, reduce labor costs, effectively avoid large flow and small temperature difference, realize the transparency of the terminal data of the HVAC water system, and provide data support for energy consumption analysis and high-efficiency systems.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] An intelligent hydraulic balancing device includes a water supply branch, a return branch, and a terminal device, wherein two ends of the terminal devices are respectively connected to the water supply branch and the return branch; the device is characterized in that:

[0006] An electric two-way valve with communication function installed between the return branch and each terminal device is used to feedback its own opening and closing status;

[0007] The flow sensor installed on the return water branch is used to monitor and feedback the flow at the location in real time;

[0008] The electric regulating valve installed on the return water branch is used to control the flow of the water supply branch;

[0009] In the return water branch, all water flowing out of the terminal equipment must flow through the flow sensor and the electric regulating valve.

[0010] According to the above technical solution, it also includes a control unit, which is connected to the electric two-way valve, the flow sensor, and the electric regulating valve through a signal line.

[0011] According to the above technical solution, temperature sensors installed on the water supply branch and the return branch are used to measure and feedback the temperature of the branch in real time; all water entering the terminal device through the water supply branch must first flow through the temperature sensor at the water supply branch, and all water flowing out of the terminal device must flow through the temperature sensor at the return branch.

[0012] According to the above technical solution, on the water return branch, along the water flow direction, there are a temperature sensor, a flow sensor, and an electric regulating valve located on the water return branch.

[0013] According to the above technical solution, the temperature sensors at the water supply branch and the water return branch must be connected to the control end inside the electric regulating valve through a signal line.

[0014] An air conditioning water system, characterized in that it comprises any of the above-mentioned intelligent hydraulic balancing devices, and an intelligent hydraulic balancing device is arranged on each floor of a building or each independently operated area.

[0015] According to the above technical solution, it also includes a water supply main road and a return water main road, and all intelligent hydraulic balancing devices are connected in parallel between the water supply main road and the return water main road; all water supply branches are connected to the water supply main road, and all return water branches are connected to the return water main road.

[0016] According to the above technical solution, it also includes a building automation system, which is connected to the control unit of each intelligent hydraulic balancing device and the control end inside the electric regulating valve through a signal line.

[0017] The utility model has the following beneficial effects:

[0018] 1. The opening state of each electric two-way valve with communication function represents the need for a design flow. The number of electric two-way valves that are opened represents the number of design flows required for the branch, and the total flow of the branch is calculated. At the same time, the flow sensor installed on the return branch monitors the flow in real time, compares the total flow with the real-time monitored flow, and adjusts the electric regulating valve so that the flow through the branch corresponds to the set flow, so as to deal with the problem of hydraulic imbalance and achieve on-demand distribution between branches. It effectively solves the problem of hydraulic imbalance, and its debugging and balancing process is very intelligent, which can reduce manpower and time costs.

[0019] 2. The temperature sensor installed on the supply / return pipe branch monitors the supply and return water temperatures in real time, and calculates the two temperature values ​​to obtain the real-time temperature difference; then the deviation between the real-time temperature difference and the set temperature difference is analyzed. If the real-time temperature difference is lower than the set temperature difference, the flow rate comparison adjustment method is not considered at this time, and the valve opening of the electric control valve is adjusted based on the temperature difference to make the real-time temperature difference higher than the set temperature difference, so as to avoid the phenomenon of large flow and small temperature difference, and allow the water flow to fully exchange heat and exchange heat in the high efficiency range.

[0020] 3. Use flow sensors and temperature sensors to obtain flow and temperature data. Use the controller to calculate the branch energy consumption, realize the digitization of terminal energy consumption, and provide data support for energy consumption analysis, efficient systems, and fault diagnosis. Transmit the terminal energy consumption value to the building automation system through the signal line. People can remotely set the size of the design flow corresponding to the opening of the electric two-way valve through the building automation system without hydraulic balance debugging; they can also use the building automation system to perform energy consumption analysis, energy-saving optimization, and fault diagnosis based on terminal data, and take remote measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment provided by the utility model;

[0022] In the figure, 1. signal line; 2. return branch; 3. water supply branch; 4. electric two-way valve; 5. terminal equipment; 7. temperature sensor; 8. flow sensor; 9. building automation system; 10. control unit; 11. electric regulating valve. DETAILED DESCRIPTION

[0023] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0024] Reference Figure 1 As shown, the utility model provides an intelligent hydraulic balancing device.

[0025] Example 1

[0026] It includes a water supply branch 3, a return branch 2, and a terminal device 5, and two ends of several terminal devices are connected to the water supply branch and the return branch respectively.

[0027] It also includes an electric two-way valve 4 with a communication function, which is arranged between the return water branch and each terminal device and is used to feedback its own opening and closing status;

[0028] A flow sensor 8 provided on the water return branch is used to monitor and feedback the flow at the location in real time;

[0029] The electric regulating valve 11 provided on the water return branch is used to control the flow of the water supply branch;

[0030] In the return water branch, all water flowing out of the terminal equipment must flow through the flow sensor and the electric regulating valve.

[0031] In this embodiment, the open state of each electric two-way valve with communication function represents the need for a design flow rate. The number of electric two-way valves that are opened represents the number of design flows required for the branch, and the total flow rate of the branch is calculated. At the same time, the flow sensor installed on the return branch monitors the flow rate in real time, compares the total flow rate with the real-time monitored flow rate, and adjusts the electric regulating valve so that the flow rate flowing through the branch corresponds to the set flow rate, so as to deal with the problem of hydraulic imbalance and achieve on-demand distribution between branches. It effectively solves the problem of hydraulic imbalance, and its debugging and balancing process is very intelligent, which can reduce manpower and time costs.

[0032] In the embodiment 1, a control unit 10 is further included, and the control unit is connected to the electric two-way valve, the flow sensor, and the electric regulating valve through the signal line 1.

[0033] When the indoor temperature reaches the set temperature, the electric two-way valve will be closed, causing the water system pressure to fluctuate, interfering with the water flow of other branches and the terminal equipment of this branch, and affecting the heat exchange effect. With this device, when hydraulic imbalance occurs, the opening state of the electric two-way valve is transmitted to the control unit through the signal line. The opening state of each electric two-way valve represents the need for a design flow. The number of electric two-way valves opened represents the number of design flows required for this branch. The control unit calculates the total flow of the branch and transmits it to the control end of the electric regulating valve on the return water line as the set flow through the signal line. At the same time, the flow sensor installed on the return water branch monitors the flow in real time and transmits the monitored value to the control unit of the regulating valve. The control unit calculates the deviation between the actual flow and the set flow, and links the regulating valve to make the flow through the branch correspond to the set flow, so as to deal with the problem of hydraulic imbalance and achieve on-demand distribution between branches.

[0034] Example 2

[0035] The structure and principle of Example 2 are similar to those of Example 1, except that: on the basis of Example 1, a regulation method of a temperature difference control electric regulating valve is additionally provided.

[0036] The temperature sensors 7 provided on the water supply branch and the return branch are used for real-time measurement and feedback of the temperature of the branch; all water entering the terminal device through the water supply branch must first flow through the temperature sensor at the water supply branch, and all water flowing out of the terminal device must flow through the temperature sensor at the return branch.

[0037] The temperature sensor installed on the supply / return pipe branch monitors the supply and return water temperatures in real time, and calculates the two temperature values ​​to obtain the real-time temperature difference; then the deviation between the real-time temperature difference and the set temperature difference is analyzed. If the real-time temperature difference is lower than the set temperature difference, the flow comparison adjustment method is not considered at this time, and the valve opening of the electric control valve is adjusted based on the temperature difference to make the real-time temperature difference higher than the set temperature difference, so as to avoid the phenomenon of large flow and small temperature difference, and allow the water flow to fully exchange heat and exchange heat in the high efficiency range.

[0038] In addition, flow sensors and temperature sensors are used to obtain flow and temperature data. The branch energy consumption can be calculated using the controller to realize the digitization of terminal energy consumption, providing data support for energy consumption analysis, efficient systems and fault diagnosis.

[0039] In Example 2, as shown in the figure, a preferred arrangement of the temperature sensor, flow sensor, and electric regulating valve is provided. On the return water branch, the temperature sensor, flow sensor, and electric regulating valve are arranged in the return water branch in the order of the water flow direction. The order of the temperature sensor and the flow sensor can also be adjusted.

[0040] In Example 2, the temperature sensors at the water supply branch and the water return branch need to be connected to the control end inside the electric regulating valve through a signal line.

[0041] This patent also provides an air conditioning water system.

[0042] Comprising any of the above-mentioned intelligent hydraulic balancing devices, an intelligent hydraulic balancing device is arranged on each floor of the building or each independently operated area.

[0043] The air conditioning water system also includes a water supply main road and a water return main road, and all intelligent hydraulic balancing devices are connected in parallel between the water supply main road and the water return main road; all water supply branches are connected to the water supply main road, and all water return branches are connected to the water return main road.

[0044] The air conditioning water system further comprises a building automation system 9, which is connected to the control unit of each intelligent hydraulic balancing device and the control end inside the electric regulating valve via a signal line.

[0045] The control unit and the control end inside the electric regulating valve calculate and analyze the temperature, pressure, and flow signals transmitted by multiple sensors to obtain the terminal energy consumption value; and transmit these data to the building automation system through the signal line. People can remotely set the size of the design flow corresponding to the opening of the electric two-way valve through the building automation system without hydraulic balance debugging; they can also use the building automation system to perform energy consumption analysis, energy-saving optimization, and fault diagnosis based on the terminal data, and take remote measures.

[0046] The above are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of patent application of the present invention still fall within the protection scope of the present invention.

Claims

1. An intelligent hydraulic balancing device, comprising a water supply branch, a water return branch, and a terminal device, wherein both ends of a plurality of terminal devices are respectively connected to the water supply branch and the water return branch; characterized in that: Also includes An electric two-way valve with communication function installed between the return branch and each terminal device is used to feedback its own opening and closing status; The flow sensor installed on the return water branch is used to monitor and feedback the flow at the location in real time; The electric regulating valve installed on the return water branch is used to control the flow of the water supply branch; In the return water branch, all water flowing out of the terminal equipment must flow through the flow sensor and the electric regulating valve.

2. The intelligent hydraulic balancing device according to claim 1 is characterized in that: The utility model also comprises a control unit, which is connected with the electric two-way valve, the flow sensor and the electric regulating valve through a signal line at the same time.

3. The intelligent hydraulic balancing device according to claim 1 or 2, characterized in that: The temperature sensors installed on the water supply branch and the return branch are used to measure and feedback the temperature of the branch in real time; all water entering the terminal device through the water supply branch must first flow through the temperature sensor at the water supply branch, and all water flowing out of the terminal device must flow through the temperature sensor at the return branch.

4. The intelligent hydraulic balancing device according to claim 3 is characterized in that: On the water return branch, a temperature sensor, a flow sensor, and an electric regulating valve are arranged in sequence along the water flow direction.

5. The intelligent hydraulic balancing device according to claim 3 is characterized in that: The temperature sensors at the water supply branch and the return branch must be connected to the control end inside the electric control valve through signal lines.

6. An air conditioning water system, characterized in that: It comprises the intelligent hydraulic balancing device as described in any one of claims 1 to 5, and an intelligent hydraulic balancing device is arranged on each floor of the building or each independently operated area.

7. The air conditioning water system according to claim 6, characterized in that: It also includes a water supply main road and a water return main road, and all intelligent hydraulic balancing devices are connected in parallel between the water supply main road and the water return main road; all water supply branches are connected to the water supply main road, and all water return branches are connected to the water return main road.

8. The air conditioning water system according to claim 6 or 7, characterized in that: It also includes a building automation system, which is connected to the control unit of each intelligent hydraulic balancing device and the control end inside the electric regulating valve through a signal line.

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