Monitoring device and system of heating ventilation air conditioning system

Abstract

The utility model provides a monitoring device and system of a heating ventilation air conditioning system, and relates to the technical field of monitoring. Comprising a data processor, a primary pipe network water supply pressure and temperature acquisition device, a primary pipe network water return pressure and temperature acquisition device, a secondary pipe network water return pressure and temperature acquisition device, an air outlet temperature and humidity acquisition device, an outdoor temperature and humidity acquisition device, a secondary pipe network water supply temperature and pressure acquisition device, a plate heat exchanger, a tubular heat exchanger and a water collector. A circulating pump control device and a temperature compensator, the processor is respectively connected with the primary pipe network water supply pressure and temperature acquisition equipment, the primary pipe network water return pressure and temperature acquisition equipment, the secondary pipe network water return pressure and temperature acquisition equipment, the air outlet temperature and humidity acquisition equipment, the outdoor temperature and humidity acquisition equipment and the secondary pipe network water supply temperature and pressure acquisition equipment; the technical problem that the monitoring efficiency of monitoring the operation equipment of the heating ventilation air conditioning system is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of monitoring, in particular to a monitoring device and system for a heating, ventilation and air conditioning (HVAC) system. Background Art

[0002] The HVAC system can be a comprehensive system including HVAC, heat exchange stations, gas boilers, heat exchange, ventilation systems, etc. In actual applications, it is necessary to remotely monitor and optimize the operating conditions of this comprehensive system in real time. At present, the monitoring content of the on-site operating equipment of the HVAC system is too single, resulting in low monitoring efficiency for the operating equipment of the HVAC system. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a monitoring device and system for an HVAC system, so as to alleviate the technical problem of low monitoring efficiency for the operating equipment of the HVAC system.

[0004] In a first aspect, an embodiment of the utility model provides a monitoring device for an HVAC system, including: a data processor, a primary pipe network supply water pressure and temperature acquisition device, a primary pipe network return water pressure and temperature acquisition device, a secondary pipe network return water pressure and temperature acquisition device, an air outlet temperature and humidity acquisition device, an outdoor temperature and humidity acquisition device, a secondary pipe network supply water temperature and pressure acquisition device, a plate heat exchanger, a tubular heat exchanger, a water collector, a circulating pump control device, and a temperature compensator;

[0005] The processor is respectively connected to the primary pipe network supply water pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network supply water temperature, and the pressure acquisition device;

[0006] The primary pipe network supply water pressure and temperature acquisition device is connected to the plate heat exchanger and is arranged before the plate heat exchanger, and the primary pipe network supply water pressure and temperature acquisition device is used to acquire the supply water temperature data and supply water pressure data of the water from the heat source;

[0007] The primary pipe network return water pressure and temperature acquisition device is connected to the tubular heat exchanger and is arranged at the total return water pipeline of the tubular heat exchanger, and the primary pipe network return water pressure and temperature acquisition device is used to acquire the primary return water temperature data and primary return water pressure data of the tubular heat exchanger;

[0008] The secondary pipe network return water pressure and temperature acquisition device is connected to the water collector and is arranged at the total return water pipeline of the water collector, and the secondary pipe network return water pressure and temperature acquisition device is used to acquire the secondary return water temperature data and secondary return water pressure data of the water collector;

[0009] A plurality of the circulating pump control devices are sequentially arranged at the interface terminals reserved in each circulating pump control cabinet of the HVAC system;

[0010] The secondary pipe network water supply temperature and pressure acquisition device is arranged at the total inlet of the water distributor of the circulating pump water lifting pipeline of the circulating pump control device, and the secondary pipe network water supply temperature and pressure acquisition device is used for acquiring the total inlet water temperature data and the total inlet water pressure data;

[0011] The air outlet temperature and humidity acquisition device is arranged at the air outlet of the HVAC system, and the air outlet temperature and humidity acquisition device is used for acquiring the air outlet temperature data and the air outlet humidity data;

[0012] Both the temperature compensator and the outdoor temperature and humidity acquisition device are arranged outdoors, and the outdoor temperature and humidity acquisition device is used for acquiring the outdoor temperature data and the outdoor humidity data;

[0013] The processor is used for performing data analysis and processing based on the incoming water temperature data, the incoming water pressure data, the primary return water temperature data, the primary return water pressure data, the secondary return water temperature data, the secondary return water pressure data, the total inlet water temperature data, the total inlet water pressure data, the air outlet temperature data, the air outlet humidity data, the outdoor temperature data and the outdoor humidity data, so as to obtain the operation condition monitoring data of the HVAC system.

[0014] Combined with the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the indoor optical cable between the processor and the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network water supply temperature and the pressure acquisition device is laid in a metal wire duct;

[0015] A section of additional cushion sleeve is tied and fixed on the optical cable laid in the cable tray;

[0016] The cable laid in the ceiling uses the ceiling support column as a wire duct, and no wire duct is arranged for laying on the cable within the scope of each support column. The cables are bundled and tied, and a flame retardant sheath is arranged on the cable.

[0017] Combined with the first aspect, the embodiment of the present utility model provides a second possible implementation manner of the first aspect. Among them, the pressure sensors and temperature sensors in the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, and the secondary pipe network water supply temperature and pressure acquisition device are set through a two-wire 4-20mA signal instrument;

[0018] In the signal instrument, the transmitter is connected to the power supply through a red wire, and the transmitter is also connected to the acquisition device through a blue wire, and the power supply is connected to the acquisition device;

[0019] Shielding wires of a grounded and shielded twisted pair signal cable are provided on both the red wire and the blue wire. The shielding layer of the shielding wire adopts a single-ended grounding method. The shielding layer is insulated and floating at the transmitter end and grounded at the control cabinet end.

[0020] Combined with the first aspect, the embodiment of the present utility model provides a third possible implementation manner of the first aspect. Among them, the communication interface modes of the air outlet temperature and humidity sensors in the air outlet temperature and humidity acquisition device include at least one of 9600bps, 8N1, and RS485 terminal; the receiver interface of the air outlet temperature and humidity sensor communicates through RS485, and the communication protocol is the MODBUS-RTU protocol.

[0021] Combined with the first aspect, the embodiment of the present utility model provides a fourth possible implementation manner of the first aspect. Among them, the data processor is communicatively connected to the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network water supply temperature, and the pressure acquisition device through a fieldbus.

[0022] Combined with the first aspect, the embodiment of the present utility model provides a fifth possible implementation manner of the first aspect. Among them, the monitoring device of the HVAC system further includes: a fieldbus input / output I / O device, the fieldbus input / output I / O device is connected to the fieldbus, and the fieldbus input / output I / O device is also communicatively connected to the sensors for providing data input and the actuators for responding to control instructions in the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, and the secondary pipe network water supply temperature and pressure acquisition device;

[0023] The fieldbus input I / O device is used to convert data from field devices into a first digital signal, and send the first digital signal to other devices outside the field devices through the fieldbus, or receive a second digital signal from the fieldbus and convert the second digital signal into a physical action.

[0024] Combined with the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network water supply temperature, and the pressure acquisition device collect field data through a PLC controller or an RTU controller, and send the field data to the data processor through the PLC controller or the RTU controller;

[0025] The PLC controller or the RTU control is also used to execute the operation corresponding to the instruction sent by the data processor, and the operation includes at least one of the following: opening a valve, closing a valve, detecting, executing the command of the superior computer, and adjusting device parameters.

[0026] Combined with the first aspect, the embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the monitoring device of the HVAC system further includes: a serial server, and the serial server is used to convert serial communication into Ethernet data; the serial server in the SCADA system is also used to connect serial devices to the network and communicate with the SCADA server.

[0027] Combined with the first aspect, the embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the outdoor temperature and humidity acquisition device is connected to the data processor through an RS232 serial communication interface.

[0028] In the second aspect, the embodiment of the present invention further provides a monitoring system for an HVAC system, including: a heating and ventilation control subsystem, a ventilation control subsystem, and a monitoring device for the HVAC system as described in the first aspect;

[0029] The main communication network between the heating and ventilation control subsystem, the ventilation control subsystem and the monitoring device of the HVAC system communicates through an industrial Ethernet;

[0030] The air outlet temperature and humidity acquisition device in the monitoring device of the HVAC system collects data through a wireless Lora self-organizing network sensor;

[0031] A cabinet controller is provided inside the ventilation unit control cabinet in the monitoring device of the HVAC system, and the cabinet controller communicates via industrial Ethernet.

[0032] The technical solution provided by the embodiment of the present utility model brings the following beneficial effects: The monitoring device and system of the heating, ventilation and air conditioning (HVAC) system provided by the embodiment of the present utility model include: a data processor, a primary pipe network water supply pressure and temperature acquisition device, a primary pipe network return water pressure and temperature acquisition device, a secondary pipe network return water pressure and temperature acquisition device, an air outlet temperature and humidity acquisition device, an outdoor temperature and humidity acquisition device, a secondary pipe network water supply temperature and pressure acquisition device, a plate heat exchanger, a tube heat exchanger, a water collector, a circulation pump control device, and a temperature compensator. The processor is respectively connected to the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, and the secondary pipe network water supply temperature and pressure acquisition device. The primary pipe network water supply pressure and temperature acquisition device is connected to the plate heat exchanger and is arranged before the plate heat exchanger. The primary pipe network water supply pressure and temperature acquisition device is used to acquire the incoming water temperature data and incoming water pressure data of the heat source incoming water. The primary pipe network return water pressure and temperature acquisition device is connected to the tube heat exchanger and is arranged at the total return water pipeline of the tube heat exchanger. The primary pipe network return water pressure and temperature acquisition device is used to acquire the primary return water temperature data and primary return water pressure data of the tube heat exchanger. The secondary pipe network return water pressure and temperature acquisition device is connected to the water collector and is arranged at the total return water pipeline of the water collector. The secondary pipe network return water pressure and temperature acquisition device is used to acquire the secondary return water temperature data and secondary return water pressure data of the water collector. A plurality of circulation pump control devices are sequentially arranged at the interface terminals reserved in each circulation pump control cabinet of the HVAC system. The secondary pipe network water supply temperature and pressure acquisition device is arranged at the total inlet of the water distributor of the circulation pump lifting pipeline of the circulation pump control device. The secondary pipe network water supply temperature and pressure acquisition device is used to acquire the total inlet water temperature data and total inlet water pressure data. The air outlet temperature and humidity acquisition device is arranged at the air outlet of the HVAC system. The air outlet temperature and humidity acquisition device is used to acquire the air outlet temperature data and air outlet humidity data. The temperature compensator and the outdoor temperature and humidity acquisition device are both arranged outdoors. The outdoor temperature and humidity acquisition device is used to acquire the outdoor temperature data and outdoor humidity data. The processor is used to perform data analysis and processing based on the incoming water temperature data, incoming water pressure data, primary return water temperature data, primary return water pressure data, secondary return water temperature data, secondary return water pressure data, total inlet water temperature data, total inlet water pressure data, air outlet temperature data, air outlet humidity data, outdoor temperature data, and outdoor humidity data to obtain the operation condition monitoring data of the HVAC system. In this solution, through the processor respectively connected to the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, and the secondary pipe network water supply temperature and pressure acquisition device, centralized control of each device in the HVAC system is realized.All devices in the HVAC system collect and process data centrally. Through centralized control, the HVAC system can monitor and manage the entire system in real time. Centralized control can ensure the overall consistency of the organization. Moreover, through centralized management and control of resources, the HVAC system can achieve more efficient operation. It allows operators to monitor and control multiple devices or systems simultaneously, thereby reducing waste of manpower and time and improving the monitoring efficiency of the operating equipment of the HVAC system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 FIG. shows the structural schematic diagram of the monitoring device of the HVAC system provided in the first embodiment of the present invention;

[0035] Figure 2 FIG. shows the wiring schematic diagram of the sensor interface provided in the first embodiment of the present invention;

[0036] Figure 3 FIG. shows the structural schematic diagram of the communication network in the monitoring device provided in the first embodiment of the present invention;

[0037] Figure 4 FIG. shows the structural schematic diagram of the monitoring system of the HVAC system provided in the second embodiment of the present invention;

[0038] Figure 5 FIG. shows another structural schematic diagram of the monitoring system of the HVAC system provided in the second embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] Currently, the monitoring efficiency of the operating equipment of the HVAC system is relatively low. Based on this, a monitoring device and system for the HVAC system provided in the embodiments of the present invention can alleviate the technical problem of relatively low monitoring efficiency of the operating equipment of the HVAC system.

[0041] For the convenience of understanding this embodiment, first, a monitoring device for a heating, ventilation, and air conditioning (HVAC) system disclosed in an embodiment of the present utility model will be introduced in detail.

[0042] Embodiment 1:

[0043] An embodiment of the present utility model provides a monitoring device for a heating, ventilation, and air conditioning (HVAC) system, as Figure 1 shown, including: a data processor, a primary pipe network supply water pressure and temperature acquisition device, a primary pipe network return water pressure and temperature acquisition device, a secondary pipe network return water pressure and temperature acquisition device, an air outlet temperature and humidity acquisition device, an outdoor temperature and humidity acquisition device, a secondary pipe network supply water temperature and pressure acquisition device, a plate heat exchanger, a tubular heat exchanger, a water collector, a circulating pump control device, and a temperature compensator; the processor is respectively connected to the primary pipe network supply water pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network supply water temperature, and the pressure acquisition device; the primary pipe network supply water pressure and temperature acquisition device is connected to the plate heat exchanger and is arranged before the plate heat exchanger, and the primary pipe network supply water pressure and temperature acquisition device is used to acquire the supply water temperature data and supply water pressure data of the water from the heat source; the primary pipe network return water pressure and temperature acquisition device is connected to the tubular heat exchanger and is arranged at the total return water pipe of the tubular heat exchanger, and the primary pipe network return water pressure and temperature acquisition device is used to acquire the primary return water temperature data and primary return water pressure data of the tubular heat exchanger; the secondary pipe network return water pressure and temperature acquisition device is connected to the water collector and is arranged at the total return water pipe of the water collector, and the secondary pipe network return water pressure and temperature acquisition device is used to acquire the secondary return water temperature data and secondary return water pressure data of the water collector; a plurality of circulating pump control devices are sequentially arranged at the interface terminals reserved in each circulating pump control cabinet of the heating, ventilation, and air conditioning (HVAC) system; the secondary pipe network supply water temperature and pressure acquisition device is arranged at the total inlet of the water distributor of the circulating pump lift pipe of the circulating pump control device, and the secondary pipe network supply water temperature and pressure acquisition device is used to acquire the total inlet water temperature data and total inlet water pressure data; the air outlet temperature and humidity acquisition device is arranged at the air outlet of the heating, ventilation, and air conditioning (HVAC) system, and the air outlet temperature and humidity acquisition device is used to acquire the air outlet temperature data and air outlet humidity data; the temperature compensator and the outdoor temperature and humidity acquisition device are both arranged outdoors, and the outdoor temperature and humidity acquisition device is used to acquire the outdoor temperature data and outdoor humidity data; the processor is used to perform data analysis and processing based on the supply water temperature data, supply water pressure data, primary return water temperature data, primary return water pressure data, secondary return water temperature data, secondary return water pressure data, total inlet water temperature data, total inlet water pressure data, air outlet temperature data, air outlet humidity data, outdoor temperature data, and outdoor humidity data to obtain the operation status monitoring data of the heating, ventilation, and air conditioning (HVAC) system.

[0044] For the installation locations of temperature monitoring devices, pressure monitoring devices, air outlet monitoring devices, and temperature compensators, as Figure 1 shown, the position number ① indicates: the primary network water supply pressure and temperature acquisition device, whose installation position is before the new plate heat exchanger in the municipal primary network, and is used for the temperature and pressure of the water from the municipal heat source; the position number ② indicates: the primary network return water pressure and temperature acquisition device, whose installation position is on the total return water pipeline of the tube heat exchanger; the position number ③ indicates: the secondary network return water pressure and temperature acquisition device, whose installation position is on the total return water pipeline of the water collector; the position number ④ indicates: the circulation pump control device (circulation pump control point), and reserved interface terminals are successively provided at the control cabinets of the 1st, 2nd, 3rd, and 4th circulation pumps; the position number ⑤ indicates: the secondary network water supply temperature and pressure acquisition device, whose installation position is at the total inlet of the water distributor in the circulation pump pumping pipeline; the position number ⑥ indicates: the air outlet temperature and humidity acquisition device, and the air outlet is selected in the waiting hall on the first basement floor; the position number ⑦ indicates: the temperature compensator, and the outdoor temperature and humidity acquisition point is selected for installation outdoors at the railway station.

[0045] In the embodiment of the present application, information processing, deviation detection, corrective measures, etc. in centralized control are all completed by a center uniformly. Therefore, centralized control can ensure the overall consistency of the organization. Improve efficiency: The centralized control system can achieve more efficient operation by centrally managing and controlling resources. It allows operators to monitor and control multiple devices or systems simultaneously from a single interface, thus reducing waste of manpower and time.

[0046] The centralized control system of the HVAC system can monitor and manage the entire system in real time, and discover and handle potential safety hazards in a timely manner. This improves the safety of the system, reduces risks caused by equipment failures or human errors, and enhances safety. Moreover, the centralized control system usually has backup and redundancy designs, which ensure that the entire system can continue to operate even if a certain part fails. In addition, the centralized control system can also quickly respond to and solve problems through remote monitoring and diagnosis, thereby improving the reliability and stability of the system. Furthermore, the centralized control system provides a global perspective of the entire system, enabling unified scheduling and management of resources. This simplifies the management process, facilitates management, reduces maintenance costs, and improves management efficiency.

[0047] The centralized control system of the HVAC system can achieve functions that are difficult or even impossible to achieve with analog instruments, and has more complete control functions, such as complex controls like advanced control and interlocking. This enables the centralized control system to handle various complex application scenarios. Moreover, the centralized control system usually has a high degree of flexibility and can add or delete control loops and change control schemes as needed. This allows the centralized control system to adapt to changing business requirements and technical environments. In addition, the centralized control system can optimize the usage mode of equipment, turn off unused equipment, thereby achieving energy-saving effects. At the same time, the centralized control system uniformly manages and maintains multiple devices, reducing maintenance costs and personnel management costs, saving energy and reducing maintenance costs.

[0048] In some embodiments, the outdoor temperature and humidity acquisition device is connected to the data processor through an RS232 serial communication interface. Exemplarily, for the standard of device selection, the outdoor temperature acquisition is the same as the air outlet temperature and humidity acquisition. Since the control room is far from the outside, 4G communication is adopted and then converted to RS232 serial communication. For the operating conditions, the working location is in the central computer room on the first basement floor of the railway station, and the ambient temperature is always above 0°C. For corrosion, the heat source medium in the railway station is water and has no corrosion. The primary supply water temperature generally does not exceed 150°C. For the measurement range, according to the operating conditions, the temperature sensor is selected as follows: the upper limit of the temperature range is not less than 110°C, and the upper limit of the pressure of the pressure sensor is not less than 1.2 Mpa. For the signal output type, voltage signals are susceptible to interference, and analog signals are 4 - 20 mA, with low delay and resistance to a certain degree of interference. The electromagnetic interference should comply with the standard: GB / T9254 / CISPR22. For the air outlet temperature and humidity acquisition module, since there are many air outlets and current wiring is difficult, a low-power wireless communication module is adopted. The working frequency is 433 MHz, the transmission power is <10 dBm, and the average power consumption is <15 μA.

[0049] In some embodiments, the indoor optical cables between the processor and the primary pipe network supply water pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network supply water temperature and pressure acquisition device are laid in metal wire troughs; there are section adding cushion sleeves tied and fixed on the optical cables laid in the cable tray; the cables laid in the ceiling use the ceiling support columns as wire troughs, and no wire troughs are set for the cables within the scope of each support column, and the cables are bundled and tied and there are flame-retardant sheaths on the cables.

[0050] For example, for the routing method, the optical cable in the building should be laid in a metal cable trough, and a cushion cover should be installed in the binding and fixing section when laying the cable in the bridge. When the ceiling support column is used as a cable trough to lay the cable in the ceiling, the cables within the jurisdiction of each support column can be laid without a cable trough, but they should be bundled and tied, the cable sheath should be flame retardant, and the cable selection should meet the design requirements. The cable trough and bridge should be more than 2.2m above the ground. The top of the cable trough and bridge should be no less than 30mm from the floor; at the lintel or other obstacles, no less than 50mm. The cables in the trough should be laid straight and try not to cross. The cables should be tied and fixed at the entry and exit of the cable trough and at the turning points, and the horizontal part of the cables can be untied. Cables laid in vertical troughs should be fixed on the cable bracket every 1.5m. When laying cables vertically in cable trays, the cables should be fixed to the brackets of the cable trays at the upper end and every 1.5m; when laying cables horizontally, they should be fixed at the beginning, end, bends and every 5-10m. When laying cables in horizontal and vertical cable trays and vertical cable ducts, the cables should be tied. Twisted cables, optical cables and other signal cables should be bundled and tied according to the type, quantity, cable diameter and number of cable cores. The spacing between ties should not be greater than 1.5m, and the spacing should be uniform with appropriate tightness. The construction technical requirements for laying electrical and optical cables in overhead, pipeline, direct burial, wall and concealed pipes in the building subsystem shall be implemented in accordance with the regulations for acceptance of network communication line projects.

[0051] In some embodiments, the pressure sensors and temperature sensors in the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, and the secondary pipe network water supply temperature and pressure acquisition device are set through a two-wire 4-20mA signal instrument; Figure 2 As shown, in the signal instrument, the transmitter is connected to the power supply through the red line, and the transmitter is also connected to the acquisition device through the blue line, and the power supply is connected to the acquisition device; the red line and the blue line are both provided with grounded shielded wires with shielded twisted pair signal cables, and the shielding layer of the shielding wire adopts a single-end grounding method. The shielding layer is insulated and floated at the transmitter end, and is grounded at the control cabinet end.

[0052] As an optional implementation, for each sensor interface, for example, pressure and temperature sensors: two-wire 4-20mA signal instrument, the wiring method is as follows Figure 2 As shown in the figure, the oval circle represents the shielded wire, and all the marked grounding points must be effectively grounded. Use shielded twisted pair signal cable. In order to avoid ground loops, the shield layer is single-ended grounded, insulated and floating at the transmitter end, and grounded at the control cabinet end. The transmitter housing is grounded by default, so the field equipment must be effectively grounded. If the field equipment cannot be grounded, the marked grounding point must be effectively grounded.

[0053] In some embodiments, the communication interface modes of the air outlet temperature and humidity sensors in the air outlet temperature and humidity acquisition device include at least one of 9600bps, 8N1, and RS485 terminals; the receiver interface of the air outlet temperature and humidity sensor communicates through RS485, and the communication protocol is the MODBUS-RTU protocol.

[0054] For the air outlet temperature and humidity sensor, by way of example, the interface modes may include: 9600bps, 8N1, RS485. Receiver interface: RS485 communication, serial port baud rate 9600bps, 8N1 data format; communication protocol: MODBUS-RTU protocol. Sensor and concentrator parameters: operating frequency is 433MHz, transmit power < 10dBm, sensitivity < -112dBm, transmit current < 60mA, receive current < 40mA, operating voltage is 2.5 - 3.6V; 5V. Transmission distance > 500 meters (line of sight), temperature accuracy < 0.5°C (0°C - 60°C) & < 2°C (-40°C - +80°C), humidity accuracy: < ±3%, acquisition period is 5 minutes (normal mode); average power consumption < 15uA, operating temperature is -40°C - +80°C.

[0055] In some embodiments, the data processor is communicatively connected to the primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network water supply temperature and pressure acquisition device through a fieldbus.

[0056] For the communication network in the monitoring device, by way of example, as Figure 3 shown, the Fieldbus is an industrial network system for communication between field devices (such as sensors, actuators, controllers, etc.). The Fieldbus technology enables devices to directly exchange data without passing through a central controller, thereby improving the efficiency of data exchange and reducing the complexity of the system.

[0057] As a possible implementation manner, the monitoring device of the HVAC system provided in the embodiments of the present application can be applied to the central computer room of the air conditioning and HVAC system in a railway station. The central computer room is the core computer room of all the air conditioning systems and HVAC systems in the railway station, with a heat exchange system, a refrigeration system, a ventilation system, a circulating water system, and other auxiliary related equipment. The solution provided in the embodiments of the present application may involve some equipment of the heat exchange, ventilation, and circulating water systems, as well as the indoor and outdoor temperature and humidity monitoring. The comprehensive system of HVAC, heat exchange, and ventilation systems involves more technologies and equipment. This comprehensive system, such as Figure 3As shown, in this system, a workstation refers to a computer used by operators to monitor and control the production process. The workstation is usually installed with a client of the monitoring software, which displays real-time data and alarm information through a graphical interface and allows operators to input control commands.

[0058] In some embodiments, the monitoring device of the HVAC system further includes: a fieldbus input / output (I / O) device, which is connected to the fieldbus. The fieldbus input / output (I / O) device is also communicatively connected to sensors for providing data input and actuators for responding to control instructions in the primary network water supply pressure and temperature acquisition device, the primary network return water pressure and temperature acquisition device, the secondary network return water pressure and temperature acquisition device, and the secondary network water supply temperature and pressure acquisition device; the fieldbus input / output (I / O) device is configured to convert data from field devices into a first digital signal and send the first digital signal to other devices outside the field devices through the fieldbus, or receive a second digital signal from the fieldbus and convert the second digital signal into a physical action.

[0059] In practical applications, as Figure 3 shown, a fieldbus input / output (I / O) device refers to a device that is connected to the fieldbus and communicates with other devices. These devices can include sensors (providing data input), actuators (such as valves, motors, for responding to control instructions), and other devices. These I / O devices convert data from field devices into digital signals, send the digital signals to other devices through the fieldbus, or receive digital signals from the fieldbus and convert them into physical actions.

[0060] In some embodiments, the primary network water supply pressure and temperature acquisition device, the primary network return water pressure and temperature acquisition device, the secondary network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary network water supply temperature, and the pressure acquisition device collect field data through a PLC controller or an RTU controller, and send the field data to a data processor through the PLC controller or the RTU controller; the PLC controller or the RTU control is also configured to perform operations corresponding to the instructions according to the instructions sent by the data processor, and the operations include at least one of the following: opening a valve, closing a valve, detecting, executing the commands of the upper computer to which it belongs, and adjusting device parameters.

[0061] Exemplarily, as Figure 3As shown, controllers such as PLC or RTU can be responsible for collecting on-site data (such as temperature, pressure, current, etc.) and sending the data to the workstation. At the same time, according to the commands sent by the workstation, it can be known that it will also perform corresponding operations, such as opening / closing valves, detecting, executing the commands of the superior computer, adjusting equipment parameters, etc. In addition, devices such as sensors and actuating units can be deployed on-site to collect data (such as temperature, pressure, etc.) and perform operations according to instructions (such as opening / closing valves).

[0062] In some embodiments, the monitoring device of the HVAC system further includes: a serial server, which is used to convert serial communication into Ethernet data; the serial server in the SCADA system is also used to connect serial devices to the network and communicate with the SCADA server.

[0063] For example, as Figure 3 shown, the serial server can also be used as a device server or a terminal server. This is a network device that can convert serial communication (such as RS-232, RS-422 or RS-485) into Ethernet data to improve data communication efficiency. In the SCADA system, the serial server can connect traditional serial devices to the network and communicate with the SCADA server to improve data transmission efficiency.

[0064] Embodiment 2:

[0065] The embodiment of the present utility model provides a monitoring system for an HVAC system, including: a heating and ventilation control subsystem, a ventilation control subsystem, and the monitoring device of the HVAC system as described in Embodiment 1 above; the main communication network between the heating and ventilation control subsystem, the ventilation control subsystem and the monitoring device of the HVAC system communicates through an industrial Ethernet; the air outlet temperature and humidity acquisition device in the monitoring device of the HVAC system collects data through a wireless Lora self-organizing network sensor; a cabinet controller is arranged in the ventilation unit control cabinet of the monitoring device of the HVAC system, and the cabinet controller communicates through an industrial Ethernet.

[0066] Exemplarily, as Figure 4 shown, there are two sets of process control stations in the monitoring system of the HVAC system, namely the heating control station and the ventilation control station, and the main communication network uses an industrial Ethernet. All process controllers adopt smart200 and supporting I / O expansion modules.

[0067] For the primary and secondary pipe networks and the circulating pump group, exemplarily, as Figure 4 and Figure 5As shown in the figure, the temperature and humidity of the air outlet of the air conditioner are collected by a wireless Lora self-organizing network sensor. The pressure and temperature of the supply and return water of the primary pipe network are remotely measured; the pressure and temperature of the supply and return water of the secondary pipe network are remotely measured; the circulation pump controls six pumps, two large pumps and one small pump. In addition, in the ventilation system, the controller (smart200) is built into the ventilation unit control cabinet, and then the industrial Ethernet communication is directly adopted.

[0068] As an alternative implementation, as Figure 5 shown in the figure, the temperature sensor includes a general-purpose temperature transmitter, and the combination of multiple interfaces and probes achieves different combined effects, suitable for different working conditions. Its temperature detection range is -50 to 300 °C; output: 4 to 20 mA, RS485, 0 to 10 VDC, 0 to 5 VDC, 1 to 5 VDC, Pt100 (1 / 3B level); power supply: 12 to 36 VDC, 15 to 36 VDC, 15 to 24 VDC; accuracy: 0.25% FS, 0.5% FS; pressure sensor: the pressure transmitter is carefully designed and has a compact structure, suitable for measuring high-temperature liquids or gases. It also has the advantages of diversified output signals, range, pressure interface, electrical connection, etc., which is convenient for matching different working conditions on site. Range: -100 kPa to 0 to 100 MPa; output: 4 to 20 mA, RS485, 0 to 10 VDC, 0 to 5 VDC, 1 to 5 VDC, 0.5 to 2.5 VDC; power supply: 9 to 36 VDC, 15 to 36 VDC, 3 to 5 VDC; accuracy: 0.1% FS, 0.25% FS, 0.5% F; controller: smart200; analog input and output: analog acquisition accuracy: ≥ 10 bits; number of analog channels: 8 channels of 4 to 20 mA input can be connected simultaneously; isolation method and withstand voltage: optoelectronic isolation is adopted, and the isolation withstand voltage ≥ 1500 V; common mode rejection ratio: ≥ 80 dB; analog output: 2 channels of 4 to 20 mA analog output, and the bus adopts optoelectronic isolation, and the isolation withstand voltage ≥ 1500 V; digital input: ≥ 16 channels of optoelectronically isolated digital input; isolation withstand voltage: ≥ 1500 V; the input circuit is isolated from the ground, and the field contacts can be passive or active; digital output: optoelectronic isolation is adopted, and the isolation withstand voltage ≥ 1500 V; number of digital output channels: 32 digital outputs can be output simultaneously.

[0069] The monitoring device of the heating, ventilation and air conditioning system provided by the embodiment of the present utility model has the same technical features as the monitoring system of the heating, ventilation and air conditioning system provided by the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0070] In addition, in the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0071] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A monitoring device for a heating, ventilation and air conditioning system, characterized in that Including: A data processor, a primary pipeline water supply pressure and temperature acquisition device, a primary pipeline return water pressure and temperature acquisition device, a secondary pipeline return water pressure and temperature acquisition device, an air outlet temperature and humidity acquisition device, an outdoor temperature and humidity acquisition device, a secondary pipeline water supply temperature and pressure acquisition device, a plate heat exchanger, a tubular heat exchanger, a water collector, a circulating pump control device, and a temperature compensator; The processor is respectively connected to the primary pipeline water supply pressure and temperature acquisition device, the primary pipeline return water pressure and temperature acquisition device, the secondary pipeline return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipeline water supply temperature, and the pressure acquisition device; The primary pipeline water supply pressure and temperature acquisition device is connected to the plate heat exchanger and is arranged before the plate heat exchanger. The primary pipeline water supply pressure and temperature acquisition device is used to acquire the incoming water temperature data and incoming water pressure data of the heat source incoming water; The primary pipeline return water pressure and temperature acquisition device is connected to the tubular heat exchanger and is arranged at the total return water pipeline of the tubular heat exchanger. The primary pipeline return water pressure and temperature acquisition device is used to acquire the primary return water temperature data and primary return water pressure data of the tubular heat exchanger; The secondary pipeline return water pressure and temperature acquisition device is connected to the water collector and is arranged at the total return water pipeline of the water collector. The secondary pipeline return water pressure and temperature acquisition device is used to acquire the secondary return water temperature data and secondary return water pressure data of the water collector; A plurality of the circulating pump control devices are sequentially arranged at the interface terminals reserved for each circulating pump control cabinet of the HVAC system; The secondary pipeline water supply temperature and pressure acquisition device is arranged at the total inlet of the water distributor of the circulating pump pumping pipeline of the circulating pump control device. The secondary pipeline water supply temperature and pressure acquisition device is used to acquire the total inlet water temperature data and total inlet water pressure data; The air outlet temperature and humidity acquisition device is arranged at the air outlet of the HVAC system. The air outlet temperature and humidity acquisition device is used to acquire the air outlet temperature data and air outlet humidity data; Both the temperature compensator and the outdoor temperature and humidity acquisition device are arranged outdoors. The outdoor temperature and humidity acquisition device is used to acquire the outdoor temperature data and outdoor humidity data; The processor is used to perform data analysis and processing based on the incoming water temperature data, the incoming water pressure data, the primary return water temperature data, the primary return water pressure data, the secondary return water temperature data, the secondary return water pressure data, the total inlet water temperature data, the total inlet water pressure data, the air outlet temperature data, the air outlet humidity data, the outdoor temperature data, and the outdoor humidity data to obtain the operation condition monitoring data of the HVAC system.

2. The monitoring device for the heating, ventilation and air conditioning system according to claim 1, characterized in that, The indoor optical cable between the processor and the first-stage pipe network water supply pressure and temperature acquisition device, the first-stage pipe network return water pressure and temperature acquisition device, the second-stage pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network water supply temperature, and the pressure acquisition device is laid in a metal wire duct; There is a section of cushion sleeve tied and fixed on the optical cable laid in the cable tray; The cable laid in the ceiling uses the ceiling support columns as wire ducts. There is no wire duct for laying on the cable within the scope of each support column. The cables are bundled and tied, and a flame-retardant sheath is provided on the cables.

3. The monitoring device for the heating, ventilation and air conditioning system according to claim 1, characterized in that, The pressure sensors and temperature sensors in the first-stage pipe network water supply pressure and temperature acquisition device, the first-stage pipe network return water pressure and temperature acquisition device, the second-stage pipe network return water pressure and temperature acquisition device, and the secondary pipe network water supply temperature and pressure acquisition device are set through a two-wire 4 - 20mA signal instrument; In the signal instrument, the transmitter is connected to the power supply through a red wire, and the transmitter is also connected to the acquisition device through a blue wire. The power supply is connected to the acquisition device; Both the red wire and the blue wire are provided with shielded wires of a grounded and shielded twisted pair signal cable. The shielding layer of the shielded wire adopts a single-ended grounding method. The shielding layer is insulated and floating at the transmitter end and grounded at the control cabinet end.

4. The monitoring device for the heating, ventilation and air conditioning system according to claim 1, characterized in that, The communication interface method of the air outlet temperature and humidity sensor in the air outlet temperature and humidity acquisition device includes at least one of 9600bps, 8N1, and RS485 termination. The receiver interface of the air outlet temperature and humidity sensor communicates through RS485, and the communication protocol is the MODBUS-RTU protocol.

5. The monitoring device for the heating, ventilation and air conditioning system according to claim 1, wherein, The data processor is communicatively connected to the first-stage pipe network water supply pressure and temperature acquisition device, the first-stage pipe network return water pressure and temperature acquisition device, the second-stage pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network water supply temperature, and the pressure acquisition device through a fieldbus; 6. The monitoring device for the HVAC system according to claim 5, characterized in that, The monitoring device of the HVAC system further includes: a fieldbus input I / O device. The fieldbus input I / O device is connected to the fieldbus, and the fieldbus input I / O device is also communicatively connected to the sensors for providing data input and the actuators for responding to control instructions in the first-stage pipe network water supply pressure and temperature acquisition device, the first-stage pipe network return water pressure and temperature acquisition device, the second-stage pipe network return water pressure and temperature acquisition device, and the secondary pipe network water supply temperature and pressure acquisition device; The fieldbus input I / O device is used to convert the data from the field devices into a first digital signal and send the first digital signal to other devices outside the field devices through the fieldbus, or receive a second digital signal from the fieldbus and convert the second digital signal into a physical action.

7. The monitoring device of the heating, ventilation and air conditioning system according to claim 1, characterized in that, The primary pipe network water supply pressure and temperature acquisition device, the primary pipe network return water pressure and temperature acquisition device, the secondary pipe network return water pressure and temperature acquisition device, the air outlet temperature and humidity acquisition device, the outdoor temperature and humidity acquisition device, the secondary pipe network water supply temperature, and the pressure acquisition device collect on-site data through a PLC controller or an RTU controller, and send the on-site data to the data processor through the PLC controller or the RTU controller; The PLC controller or the RTU control is also used to execute the operations corresponding to the instructions sent by the data processor, and the operations include at least one of the following: opening a valve, closing a valve, detecting, executing the commands of the superior computer, and adjusting device parameters.

8. The monitoring device of the HVAC system according to claim 1, characterized in that, The monitoring device of the HVAC system further includes: a serial server, which is used to convert serial communication into Ethernet data; the serial server in the SCADA system is also used to connect serial devices to the network and communicate with the SCADA server.

9. The monitoring device of the heating, ventilation and air conditioning system according to claim 1, characterized in that, The outdoor temperature and humidity acquisition device is connected to the data processor through an RS232 serial communication interface.

10. A monitoring system for a heating, ventilation and air conditioning system, characterized in that, Including: A heating control subsystem, a ventilation control subsystem, and a monitoring device for the HVAC system according to any one of claims 1-9; The main communication network between the heating control subsystem, the ventilation control subsystem, and the monitoring device of the HVAC system communicates through an industrial Ethernet; The air outlet temperature and humidity acquisition device in the monitoring device of the HVAC system collects data through a wireless Lora self-organizing network sensor; A cabinet controller is provided in the ventilation unit control cabinet of the monitoring device of the HVAC system, and the cabinet controller communicates through an industrial Ethernet.

Images