A heat apportioning metering device

Abstract

The utility model relates to a kind of heat apportioning metering devices, belong to heat metering technical field.The technical scheme is: building heat meter is installed on heating water supply pipe and heating return pipe, on-off controller and water temperature measuring instrument are all installed on the user heating water supply branch pipe and user heating return branch pipe of entering heating user, temperature sensor is installed in the room of heating user;The RS485 end of RS485 conversion M-BUS module of the collection apportioning ware is connected using RS485 communication cable;Building heat meter, on-off controller and water temperature measuring instrument are respectively connected with the M-BUS end of RS485 conversion M-BUS module using M-BUS cable, form bus type topology structure.The utility model has the beneficial effects that: bus type topology structure is used to optimize wiring and construction cost, improve equipment compatibility and system expansibility, can be well completed heat apportioning metering, improve dustproof heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to a heat distribution metering device, belonging to the field of heat supply metering technology. Background Technology

[0002] Various metering methods and supporting instruments have emerged in the field of heat metering technology and are gradually being applied to centralized heating systems. According to the "Technical Specification for Heat Metering" (JGJ173-2009), individual household heat metering can adopt two methods: direct heat metering or heat allocation metering. Direct heat metering calculates heat supply independently through household heat meters, but it suffers from high initial investment and complex maintenance. Heat allocation metering installs a master meter at the building entrance and determines the user's heat consumption ratio through indoor measuring devices; while reducing equipment costs, it suffers from insufficient adaptability to various operating conditions.

[0003] The "Technical Conditions for Heat Metering Devices Based on On / Off Time and Area Method" (JG / T 379-2012) promulgated by the Ministry of Housing and Urban-Rural Development of the People's Republic of China clearly stipulates the technical specifications for "heat metering devices based on on / off time and area method". This device regulates room temperature through an on / off controller and, based on the ratio of the cumulative valve opening time to the user's building area, calculates the allocation of the total heat to each heat user through a heat acquisition and allocation device, forming an integrated metering system of "one main meter per building, one allocation per household"; for example, the "Heat Metering Heat Allocation Method and Device" disclosed in Chinese patent application CN201310209567.5. However, the existing heat allocation metering device layout has exposed many problems: 1. High wiring complexity: The traditional model adopts a decentralized deployment architecture of "one device per building, one terminal per household". Each device needs independent wiring to the main station. As the user scale expands, the number of cables increases linearly, which not only prolongs the construction period but also increases the difficulty of later maintenance. 2. High Communication Energy Consumption: Equipment and metering devices require periodic communication for data synchronization. Some terminals, due to power consumption limitations, require additional power cables, resulting in a hybrid "high-voltage + low-voltage" wiring system. This not only increases material costs but also reduces system reliability. 3. Insufficient Protection: In northern regions during winter, heating station environments have high dust concentrations, measured at 0.8-1.2 mg / m³. Most existing devices use open-type heat dissipation structures, making them prone to dust accumulation and short-circuit failures. Furthermore, in outdoor installations, traditional single-door designs are ineffective against vandalism. According to a 2023 heating equipment maintenance report, 12% of metering device damage was caused by unauthorized access. 4. Defective Power Supply Reliability: Existing technologies rely on a single mains power supply. In areas with frequent power outages, such as older residential areas, power outages can easily lead to data loss. In a 2022 heating metering dispute in a certain city, 37% of cases were directly related to metering failures caused by power outages. Utility Model Content

[0004] The purpose of this invention is to provide a heat distribution metering device that optimizes wiring and construction costs, improves equipment compatibility and system scalability, enhances dustproof and heat dissipation effects, completes heat distribution metering, and solves the aforementioned technical problems existing in the prior art.

[0005] The technical solution of this utility model is: A heat distribution metering device includes a chassis housing, a building heat meter, an on / off controller, a temperature sensor, and a water temperature measuring instrument. The chassis housing houses a heat acquisition and distribution unit, a power supply module, and an RS485 to M-BUS module. The building heat meter is installed on the heating supply and return water pipes. The on / off controller and water temperature measuring instrument are both installed on the user's heating supply and return water branch pipes. The temperature sensor is installed in the user's room. The heat acquisition and distribution unit is connected to the RS485 terminal of the RS485 to M-BUS module via an RS485 communication cable. The M-BUS cable has multiple reserved external integrated terminals. The building heat meter and the RS485 to M-BUS module... The M-BUS terminal uses an M-BUS cable for wired connection. The on / off controller and water temperature measuring instrument are respectively connected to an external integrated terminal. The external integrated terminal is connected to the M-BUS terminal of the RS485 to M-BUS module via an M-BUS cable, forming a bus topology. The M-BUS cable is a non-polarized twisted pair cable. The on / off controller and temperature sensor are connected via wired or wireless means. The power supply module provides power to the data acquisition and distribution unit and the RS485 to M-BUS module. The bus topology connects multiple building heat meters, on / off controllers, or water temperature measuring instruments to the same M-BUS cable, and data is transmitted through the M-BUS cable.

[0006] Furthermore, the communication module built into the on / off controller and temperature sensor employs data protocol verification to perform strong verification on all received data. This effectively shields abnormal signals caused by any device malfunction. When a device malfunctions, the data acquisition and distribution unit will be aware of the malfunctioning device in the next round of data acquisition and distribution, allowing for timely handling. The on / off controller's actions are controlled by the data acquisition and distribution unit. It does not take action during data acquisition, and only one on / off controller can act at a time. This means that when multiple on / off controllers need to act, the next on / off controller will only begin acting after the previous one has finished.

[0007] This utility model's data acquisition and distribution device collects and controls all connected devices sequentially, meaning that whether reading data or controlling the on / off switch, the next communication will only begin after the previous one ends. It also requires the on / off controller and temperature sensor to have a data acquisition response time of less than 0.1 seconds and the on / off controller to have a response time of less than 5 seconds. Even if hundreds of devices are connected and a large number of on / off switches are controlled at different times, synchronous control can be guaranteed within a maximum of 1 minute.

[0008] This invention employs a topology structure that simplifies and speeds up the construction process, significantly reducing construction time and difficulty. Building heat meters or on / off controllers only need to be connected to the bus for data communication. The data acquisition and distribution unit sends data packets to the bus, and all building heat meters or on / off controllers connected to the bus receive the data. Because the M-BUS cable has multiple pre-installed external integrated terminals, when adding new user lines, simply connect the device to the pre-installed external integrated terminals without damaging the M-BUS cable wiring.

[0009] Furthermore, the non-polarized twisted pair cable is an insulated and physically protected non-polarized twisted pair cable, possessing strong strength and anti-interference capabilities. It also allows the M-BUS cable to be deployed in a protected environment, preventing the entire distributed system from failing.

[0010] Furthermore, the chassis housing is equipped with integrated terminals, and the RS485 to M-BUS module is connected to the M-BUS cable through the integrated terminals.

[0011] Furthermore, the enclosure is equipped with a double door, with the outermost being a protective door and the innermost being a case door. The case door is equipped with an anti-theft lock to prevent unauthorized opening and ensure the safety of the equipment inside the device.

[0012] Furthermore, the side of the chassis features honeycomb-shaped ventilation holes. This design ensures good ventilation and heat dissipation while effectively preventing dust from entering the chassis. Cooling fans are installed on both sides of the data acquisition unit inside the chassis, automatically starting and stopping based on the unit's operating temperature to further optimize heat dissipation.

[0013] Furthermore, the input terminal of the power supply module is connected to an AC220V power cable via a power control switch to rectify the AC power into DC power; the output terminal of the power supply module supplies power to the data acquisition and distribution unit and the RS485 to M-BUS module via a DC24V power cable.

[0014] Furthermore, the power supply module features a dual power supply structure of mains power and battery, comprising a rectifier module and a battery arranged in parallel, with switching controlled by a dual power transfer switch. When the mains power is normal, the mains power supplies 220V to 24V through the rectifier module, simultaneously charging the battery. When the mains power fails, the dual power transfer switch switches to battery power, ensuring the device can continue to operate normally for a period of time even in the event of a mains power outage, thus guaranteeing data integrity and system stability. The battery is installed in a battery compartment at the bottom of the chassis, with mesh ventilation openings around the compartment for easy battery heat dissipation.

[0015] The beneficial effects of this utility model are as follows: The adoption of a bus topology optimizes cabling and construction costs, and improves equipment compatibility and system scalability; Integrated power supply design: Through a centralized power supply mode using DC24V power cables, the need for mixed "high-voltage + low-voltage" cabling is eliminated, reducing single-device cabling costs by approximately 65%, while avoiding electromagnetic interference problems caused by independent power lines; The dustproof and heat dissipation design of the chassis effectively prevents dust from entering the chassis, avoiding dust accumulation that could damage the equipment. Simultaneously, the combination of heat dissipation ducts and cooling fans can promptly expel the heat generated by the equipment from the chassis, ensuring the equipment operates in a suitable temperature environment, extending the equipment's lifespan, and effectively achieving heat distribution and metering. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of a double-layer door according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the heat dissipation holes on the side of the chassis shell in an embodiment of this utility model; Figure 4 This is a schematic diagram of the power supply module according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the mesh ventilation opening in the battery compartment according to an embodiment of the present invention; In the diagram: 1. Chassis housing; 2. Data acquisition and distribution unit; 3. Power supply module; 4. RS485 to M-BUS module; 5. Power control switch; 6. Integrated terminal; 7. Building heat meter; 8. On / off controller; 9. Temperature sensor; 10. AC220V power cable; 11. DC24V power cable; 12. RS485 communication cable; 13. M-BUS cable; 14. Heating user; 15. Heating water supply pipe; 16. Heating return pipe; 17. Cooling fan; 18. Protective door; 19. Box door; 20. Anti-theft lock; 21. Ventilation hole; 22. Battery compartment; 23. Rectifier module; 24. Battery; 25. Dual power switch; 26. Mesh vent; 27. Water temperature measuring instrument; 28. User heating water supply branch pipe; 29. ​​User heating return branch pipe; 30. External integrated terminal. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] See attached document Figure 1-5 A heat distribution metering device includes a housing 1, a building heat meter 7, an on / off controller 8, a temperature sensor 9, and a water temperature measuring instrument 27. The housing 1 houses a heat distribution unit 2, a power supply module 3, and an RS485 to M-BUS module 4. The building heat meter 7 is installed on the heating supply pipe 15 and the heating return pipe 16. The on / off controller 8 and the water temperature measuring instrument 27 are both installed on the user's heating supply branch pipe 28 and the user's heating return branch pipe 29 leading to the heating user 14. The temperature sensor 9 is installed in the room of the heating user 14. The heat distribution unit 2 is connected to the RS485 terminal of the RS485 to M-BUS module 4 via an RS485 communication cable 12. The M-BUS cable 13 has multiple external integrated terminals 30 reserved. The building heat meter 7 and the RS485 to M-BUS module 4 are connected via an RS485 communication cable 12. The M-BUS terminal of the US module 4 is wired via M-BUS cable 13; the on / off controller 8 and the water temperature measuring instrument 27 are respectively connected to the external integrated terminal 30, and the external integrated terminal 30 is wired to the M-BUS terminal of the RS485 to M-BUS module 4 via M-BUS cable 13, forming a bus topology. The M-BUS cable 13 is a non-polarized twisted pair cable; the on / off controller 8 and the temperature sensor 9 are connected via wired or wireless means; the power supply module 3 provides power to the data acquisition and distribution unit 2 and the RS485 to M-BUS module 4; the bus topology connects multiple building heat meters 7, on / off controllers 8, or water temperature measuring instruments 27 to the same bus M-BUS cable 13, and the data will be transmitted through the M-BUS cable 13.

[0019] See attached document Figure 1 The chassis housing 1 is equipped with an integrated terminal 6, and the RS485 to M-BUS module 4 is connected to the M-BUS cable 13 through the integrated terminal 6.

[0020] The data acquisition and allocation device 2 is known and commonly used in the art. It has built-in heat allocation and metering software for processing. The heat allocation and metering software is compiled according to the "Technical Conditions for Heat Metering Devices Using the On / Off Time-Area Method" (JG / T 379-2012), which is known and commonly used in the art. For example, the product manufactured and sold by the applicant: HZFTQ-01 data allocation device; or the data acquisition calculator disclosed in Chinese patent application CN201310209567.5, "A Heat Allocation Method and Device for Heat Metering," which is the data acquisition and allocation device 2 of this application.

[0021] The M-BUS cable 13 is a non-polar twisted pair cable, which is a commercially available product.

[0022] The water temperature measuring instrument 27 is a well-known and commonly used metering product in the art, such as the commercially available HZ-T water temperature measuring instrument, manufactured by Huizhong Instrument Co., Ltd.; the on / off controller 8 is a well-known and commonly used automatic control valve in the art, such as the commercially available HZTJF-P2 intelligent regulating valve, manufactured by Huizhong Instrument Co., Ltd.; the temperature sensor 9 is also well-known and commonly used, such as the commercially available HZT-14 room temperature sensor, manufactured by Huizhong Instrument Co., Ltd. The building heat meter 7 is a well-known and commonly used product in the art, such as the commercially available CRL-G pipe section ultrasonic heat meter, manufactured by Huizhong Instrument Co., Ltd.

[0023] See attached document Figure 2 The chassis 1 is equipped with a double door. The outermost door is a protective door 18, and the inner door is a cabinet door 19. The cabinet door 19 is equipped with an anti-theft lock 20 to prevent unauthorized opening and ensure the safety of the equipment inside the device.

[0024] See attached document Figure 3 The chassis housing 1 has honeycomb-shaped ventilation holes 21 on its side. This design ensures good ventilation and heat dissipation while effectively preventing dust from entering the chassis. (See attached diagram.) Figure 1 Cooling fans 17 are installed on the left and right sides of the data acquisition and distribution unit 2 inside the chassis housing 1. They can automatically start and stop according to the operating temperature of the data acquisition and distribution unit 2, further optimizing the heat dissipation effect.

[0025] The data acquisition and distribution unit 2 can control the building heat meter 7, water temperature measuring instrument 27, on / off controller 8 and temperature sensor 9 in real time, including reading data and remote control. It can also store the data of the building heat meter 7, on / off controller 8 and temperature sensor 9, and store the basic information of heating users.

[0026] See attached document Figure 1 The input terminal of the power supply module 3 is connected to the AC220V power cable 10 through the power control switch 5 to rectify the AC power into DC power; the output terminal of the power supply module 3 supplies power to the data acquisition and distribution unit 2 and the RS485 to M-BUS module 4 through the DC24V power cable 11.

[0027] See attached document Figure 4The power supply module 3 is a dual-power supply structure consisting of mains power and a battery. It includes a rectifier module 23 and a battery 24 arranged in parallel, and the switching is controlled by a dual-power transfer switch 25. When the mains power is normal, the mains power supplies 220V to 24V through the rectifier module 23, and simultaneously charges the battery 24. When the mains power fails, the dual-power transfer switch 25 switches to battery power, ensuring that the device can continue to operate normally for a period of time even when the mains power is lost, thus guaranteeing data integrity and system stability. (See attached diagram.) Figure 5 The battery 24 is installed in the battery compartment 22 at the bottom of the chassis 1. The battery compartment 22 is provided with mesh ventilation holes 26 around it to facilitate heat dissipation of the battery 24.

[0028] The M-BUS terminal of the RS485 to M-BUS module 4 is connected to the integrated terminal 6 via an M-BUS cable 13, and is connected to the power supply module 3 via a DC24V power cable 11. The integrated terminal 6 serves as the backbone bus of the external device topology and can be connected to the device, while also providing power to the external device.

[0029] In this embodiment: the data acquisition distribution unit 2, power supply module 3, RS485 to M-BUS module 4 and integrated terminal 6 are fixed inside the chassis housing 1 and installed by means of baffles or blocks.

[0030] In this embodiment: the cables inside the chassis 1 are arranged in layers according to type: AC220V power cable 10 and RS485 communication cable 12 are routed in separate channels, and the DC24V power cable 11 and AC220V power cable 10 are spaced ≥10cm apart, with a metal isolation plate in between.

[0031] In this embodiment: the building heat meter 7 is installed on the building's heating water supply pipe 15 to collect data from the building's heating water supply pipe 15 and heating water return pipe 16 to measure the total heat used by all users in the building. The on / off controller 8 and the water temperature measuring instrument 27 are both installed on the user's heating water supply branch pipe 28, and the temperature sensor 9 is installed in the user's room. The on / off controller 8 and the temperature sensor 9 are connected via wired or wireless means. The water temperature measuring instrument 27 is used to collect the user's inlet water temperature and return water temperature, and the on / off controller 8 is used to collect data such as the user's cumulative valve opening time, cumulative flow, and the temperature sensor 9 reading (indoor temperature). By comparing with the user's preset temperature, the on / off state of the valve is controlled, thereby adjusting the heat delivered into the room.

[0032] The building heat meter 7, on / off controller 8, and water temperature measuring instrument 27 are respectively wired to the integrated terminal 6 inside the chassis housing 1 using M-BUS cable 13 to form a bus topology.

Claims

1. A heat distribution metering device, characterized in that: The system includes a chassis housing (1), a building heat meter (7), an on / off controller (8), a temperature sensor (9), and a water temperature measuring instrument (27). The chassis housing (1) is equipped with a data acquisition distributor (2), a power supply module (3), and an RS485 to M-BUS module (4). The building heat meter (7) is installed on the heating water supply pipe (15) and the heating water return pipe (16). The on / off controller (8) and the water temperature measuring instrument (27) are installed on the user heating water supply branch pipe (28) and the user heating water return branch pipe (29) leading to the heating user (14). The temperature sensor (9) is installed in the room of the heating user (14). The data acquisition distributor (2) is connected to the RS485 terminal of the RS485 to M-BUS module (4) using an RS485 communication cable (12). The M-BUS cable (13) has multiple external integrated terminals (30). The building heat meter (7) and the RS485 to M-BUS module (4) are connected to the RS485 to M-BUS module (4). The M-BUS terminal of module (4) is wired using M-BUS cable (13); the on / off controller (8) and the water temperature measuring instrument (27) are respectively connected to the external integrated terminal (30), and the external integrated terminal (30) and the M-BUS terminal of RS485 to M-BUS module (4) are wired using M-BUS cable (13) to form a bus topology. The M-BUS cable (13) is a non-polar twisted pair. The on / off controller (8) and the temperature sensor (9) are connected by wired or wireless means. The power supply module (3) provides power to the data acquisition and distribution unit (2) and RS485 to M-BUS module (4). The bus topology connects multiple building heat meters (7) or on / off controllers (8) or water temperature measuring instruments (27) to the same bus M-BUS cable (13), and the data will be transmitted through the M-BUS cable (13).

2. The heat distribution metering device according to claim 1, characterized in that: The chassis housing (1) is provided with an integrated terminal (6), and the RS485 to M-BUS module (4) is connected to the M-BUS cable (13) through the integrated terminal (6).

3. A heat distribution metering device according to claim 1 or 2, characterized in that: The chassis (1) is equipped with a double door, the outermost being a protective door (18), and the inner part of the protective door (18) is a cabinet door (19), which is equipped with an anti-theft lock (20).

4. The heat distribution metering device according to claim 3, characterized in that: The side of the chassis housing (1) has a honeycomb structure heat dissipation hole (21); cooling fans (17) are installed on the left and right sides of the data acquisition and distribution unit (2) inside the chassis housing (1).

5. A heat distribution metering device according to claim 1 or 2, characterized in that: The input end of the power supply module (3) is connected to the AC220V power cable (10) through the power control switch (5) to rectify the AC power into DC power; the output end of the power supply module (3) supplies power to the data acquisition and distribution unit (2) and the RS485 to M-BUS module (4) through the DC24V power cable (11).

6. A heat distribution metering device according to claim 5, characterized in that: The power supply module (3) is a dual power supply structure of mains power and storage battery, including a rectifier module (23) and a storage battery (24) arranged in parallel, and the switching is controlled by a dual power supply switching switch (25); the storage battery (24) is installed in the battery compartment (22) at the bottom of the chassis housing (1), and the battery compartment (22) is provided with mesh ventilation openings (26) around it.

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