Control module and non-invasive heating and ventilation system control device

Abstract

The utility model relates to the technical field of control devices, in particular to a control module and a non-intrusive heating and ventilation system control device, and the control device comprises a main controller which is provided with a power supply and Homebus communication two-in-one port and is externally connected with a power supply communication line; the control cabinet is provided with a start button and a stop button, the external wiring terminal of the normally open control module is connected to the two ends of the start button to serve as another start switch, and the external wiring terminal of the normally closed control module is connected to the stop button mounting loop to serve as another stop switch; the power supply communication interfaces of the control module are connected to the power supply communication line; according to the utility model, the framework of the main controller and the plurality of control modules is adopted, the number and the type of the control modules can be flexibly configured according to field requirements, and simulation operation of switches / buttons of an original control cabinet and real-time acquisition of states of indicating lamps / contacts can be realized.

Description

Technical Field

[0001] This utility model relates to the field of control device technology, and in particular to a control module and a non-invasive HVAC system control device. Background Technology

[0002] In the intelligent transformation of HVAC systems (such as water pumps, cooling towers, etc.), traditional controllers usually require circuit modifications to the original control cabinet, such as removing the original switches and buttons and rewiring, or replacing the entire control system. This transformation method has the following drawbacks: First, invasive transformation is costly, requiring the removal of original components, resulting in a long construction period and potential disruption to the stability of the original system; second, wiring is complex, with traditional solutions requiring separate power and communication lines for each functional module, which is particularly difficult and time-consuming to implement in the confined space of old control cabinets.

[0003] To address the aforementioned issues, Chinese invention patent CN119966082A discloses a standardized retrofit module for electrical cabinets and a remote control method. Each module has four interfaces, and via Bluetooth, the required relay modules (220V relay module, 24V relay module, normally closed relay module, and normally open relay module) can be selected based on the type of button connected. During retrofitting, a single module can be used without removing existing components, allowing for standardized retrofitting of current electrical cabinets. However, since only one of the four interfaces is used, and the actual interface functions required in the field are not allocated in a 1:1:1:1 ratio (normally open functions are more frequently needed), the remaining interfaces become unused, resulting in resource waste. Utility Model Content

[0004] The purpose of this utility model is to provide a control module and a non-intrusive HVAC system control device to solve the problems existing in the prior art. To achieve the above objective, this utility model provides the following technical solution:

[0005] In a first aspect, this utility model provides a control module, which has a built-in slave controller and an external power supply and communication interface and an external wiring terminal. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in normally open relay, as well as an input circuit formed by a coil connected to the slave controller and an output circuit formed by a normally open contact connected to the external wiring terminal.

[0006] Secondly, this utility model provides a control module, which has a built-in slave controller and an external power supply and communication interface and an external wiring terminal. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in normally closed relay, as well as an input circuit formed by a coil connected to the slave controller and an output circuit formed by a normally closed contact connected to the external wiring terminal.

[0007] Thirdly, this utility model provides a control module, which has a built-in slave controller and an external power supply and communication interface and an external wiring terminal. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in AC normally open relay, as well as an output circuit formed by normally open contacts connected to the slave controller and an input circuit formed by coils connected to the external wiring terminal.

[0008] Fourthly, this utility model provides a control module, which has a built-in slave controller and an external power supply and communication interface and an external wiring terminal. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in DC normally open relay, as well as an output circuit formed by normally open contacts connected to the slave controller and an input circuit formed by coils connected to the external wiring terminal.

[0009] Fifthly, this utility model provides a control module, which has a built-in slave controller and an external power supply and communication interface and external wiring terminals. The power supply and communication interface is connected to the slave controller, and the two ends of the slave controller are connected to the external wiring terminals.

[0010] Sixthly, this utility model provides a non-invasive HVAC system control device, comprising:

[0011] The main controller has a combined power supply and Homebus communication port and can be connected to an external power supply and communication cable;

[0012] The control cabinet has a start button and a stop button. As described in the first aspect, the external wiring terminals of the control module are connected to both ends of the start button as another start switch. As described in the second aspect, the external wiring terminals of the control module are connected to the stop button mounting circuit as another stop switch. The power supply and communication interfaces of the control modules described in the first and second aspects are both connected to the power supply and communication lines.

[0013] As a further technical solution, the control cabinet also has AC indicator lights and DC indicator lights; the external wiring terminals of the control module as described in the third aspect are connected to both ends of the AC indicator lights, and the external wiring terminals of the control module as described in the fourth aspect are connected to both ends of the DC indicator lights; the power supply and communication interfaces of the control modules as described in the third and fourth aspects are both connected to the power supply and communication lines.

[0014] As a further technical solution, the control cabinet also has a contactor, and the external wiring terminal of the control module described in the fifth aspect is connected to both ends of the normally open contact of the auxiliary contact of the contactor; the power supply communication interface of the control module described in the fifth aspect is connected to the power supply communication line.

[0015] As a further technical solution, the main controller is also equipped with independent Homebus communication interface and 485 communication interface.

[0016] As a further technical solution, the power supply and communication line is a four-core line, of which two cores are used for power supply and the other two cores are used for Homebus communication.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) This utility model adopts a "main controller + multiple control modules" architecture. Each control module is connected in parallel via a four-core wire including a power line and an HBS bus. The control modules are subdivided into normally open control modules, normally closed control modules, AC control modules, DC control modules, and switch input modules. It supports flexible configuration of the number and type of control modules according to the needs of the site, and realizes the simulation operation of the original control cabinet switches / buttons and the real-time acquisition of the status of indicator lights / contacts.

[0019] (2) The four-core cable chain wiring in this utility model simplifies construction, reduces the amount of cable used compared with the traditional solution, supports the expansion and hot-swapping of multiple control modules, and is suitable for the intelligent transformation of existing building HVAC equipment, significantly reducing transformation costs and construction difficulty. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute a limitation thereof. It should also be understood that these drawings are shown for simplicity and clarity and are not necessarily drawn to scale. This utility model will now be described and explained with additional features and details using the accompanying drawings, wherein:

[0021] Figure 1 A schematic diagram of a non-invasive HVAC system control device is shown in an embodiment of this utility model;

[0022] Figure 2 A schematic diagram of the external interface of the control module in an embodiment of this utility model is shown;

[0023] Figure 3 A schematic diagram of the normally open control module in an embodiment of this utility model is shown;

[0024] Figure 4 A schematic diagram of the normally closed control module in an embodiment of this utility model is shown;

[0025] Figure 5 A schematic diagram of the AC control module in an embodiment of this utility model is shown;

[0026] Figure 6A schematic diagram of the DC control module in an embodiment of this utility model is shown;

[0027] Figure 7 A schematic diagram of the switch input module in an embodiment of this utility model is shown.

[0028] In the diagram: 1. Main controller; 11. 485 communication interface; 12. Homebus communication interface; 2. Power supply and communication line; 3. Normally open control module; 4. Normally closed control module; 5. AC control module; 6. DC control module; 7. Switch input module; 8. External wiring terminal; 9. Slave controller; 10. Power supply and communication interface. Detailed Implementation

[0029] The technical solutions in the typical embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figure 2 and Figure 3 As shown, this embodiment provides a control module, which is named normally open control module 3 in this embodiment. It has a built-in slave controller 9, an external power supply and communication interface 10 and an external wiring terminal 8. The power supply and communication interface 10 is connected to the slave controller 9.

[0032] In this embodiment, a microcontroller (MCU) is selected as the slave controller 9, and the power supply and communication interface 10 serves as both the power supply and communication interface (specifically, the Homebus communication interface, or HBS communication interface for short). The slave controller 9 is connected to the master controller 1 via an external power supply and communication cable. The slave controller 9 can collect signals and transmit them to the master controller 1, and can also receive instructions from the master controller 1 to perform corresponding actions. In this embodiment, the power supply and communication interface is a 4-pin terminal block, located on both sides of the control module and internally connected. Either pin can be inserted when connecting the power supply and communication cable.

[0033] In this embodiment, the control module has two external wiring terminals 8 for connecting the control module to the devices on the control cabinet. In this embodiment, the control module acts as a start switch; during connection, the two external wiring terminals are respectively connected to both ends of the start button on the control cabinet, thus connecting the control module and the start button in parallel.

[0034] like Figure 3 As shown, the normally open control module 3 also has a built-in normally open relay, as well as an input circuit formed by the coil connecting to the controller 9 and an output circuit formed by the normally open contact connecting to the external wiring terminal 8. The controller 9 can control the closing of the normally open relay.

[0035] When the normally open control module 3 does not receive a control signal, the coil is not energized. When it receives a control signal from the main controller 1, it energizes the coil of the input circuit of the controller 9 (MCU), causing the normally open contact to close and thus control the connected device to form a circuit. This control module is mostly used to control the machine's power-on operation.

[0036] Example 2

[0037] like Figure 4 As shown, this embodiment provides a control module, which is named normally closed control module 4 in this embodiment. It has an external power supply and communication interface 10 and an external wiring terminal 8. The built-in controller 9 is the same as in embodiment 1, and will not be described again here.

[0038] The difference is that the normally closed control module 4 has a built-in normally closed relay, as well as an input circuit formed by the coil connecting to the controller 9 and an output circuit formed by the normally closed contact connecting to the external wiring terminal 8. The controller 9 can control the opening of the normally closed relay.

[0039] In this embodiment, the control module is typically used as a stop switch. When connecting, the two external wiring terminals 8 are connected to the stop button mounting circuit of the control cabinet, and the control module is connected in series in the stop button mounting circuit.

[0040] When the normally closed control module 4 does not receive a control signal, the coil is not energized. When it receives a control signal from the main controller 1, it energizes the coil of the input circuit of the controller 9 (MCU), which opens the normally closed contact and controls the connected equipment to form an open circuit. This control module is mostly used to control the machine shutdown operation.

[0041] Example 3

[0042] like Figure 5 As shown, this embodiment provides a control module, named AC control module 5 in this embodiment. Since the control cabinet typically uses 220V AC power, the AC control module is designed for 220V. It has an external power supply and communication interface 10 and external wiring terminals 8. The internal controller 9 is the same as in embodiment 1, and will not be described again here.

[0043] Unlike Embodiment 1, the control module also includes a built-in normally open AC relay, an output circuit formed by normally open contacts connected to the controller 9, and an input circuit formed by coils connected to external terminals 8.

[0044] The external device corresponding to the AC control module 5 is the AC indicator light (specifically a 220V indicator light) of the control cabinet. The AC control module 5 is used to collect the AC indicator light signal connected to the external terminal 8 and send it back to the slave controller 9, which then sends it back to the main controller 1.

[0045] The two external terminals 8 of the AC control module 5 are connected to the two ends of the AC indicator light to detect the voltage at the two ends of the AC indicator light, thereby obtaining a power-on / off or fault signal.

[0046] When the AC indicator light connected to the AC control module 5 is powered on, the coil of the AC control module 5 is energized, causing the normally open contact connected to the controller 9 (MCU) to close, the circuit is connected, a signal is obtained from the controller 9 and sent back to the main controller 1, thus obtaining a power-on / off or fault signal.

[0047] Example 4

[0048] like Figure 6 As shown, this embodiment provides a control module, named DC control module 6 in this embodiment. Since the control cabinet typically uses 24V DC power, the DC control module is designed for 24V. It has an external power supply and communication interface 10 and external wiring terminals 8. The internal controller 9 is the same as in embodiment 1, and will not be described again here.

[0049] Unlike Embodiment 1, the control module also includes a built-in DC normally open relay, as well as an output circuit formed by normally open contacts connected to the controller 9 and an input circuit formed by coils connected to external terminals 8.

[0050] The external device corresponding to the DC control module 6 is the DC indicator light (specifically a 24V indicator light) of the control cabinet. The DC control module 6 is used to collect the DC indicator light signal connected to the external terminal 8 and send it back to the slave controller 9, which then sends it back to the main controller 1.

[0051] The two external terminals 8 of the DC control module 6 are connected to the two ends of the DC indicator light to detect the voltage across the DC indicator light, thereby obtaining a power-on / off or fault signal.

[0052] When the DC indicator light connected to the DC control module 6 is powered on, the coil of the DC control module 6 is energized, causing the normally open contact connected to the controller 9 (MCU) to close, the circuit is connected, a signal is obtained from the controller 9 and sent back to the main controller 1, thus obtaining a power-on / off or fault signal.

[0053] Example 5

[0054] like Figure 7 As shown, this embodiment provides a control module, which is named switch input module 7 in this embodiment. It has an external power supply and communication interface 10 and an external wiring terminal 8. The built-in controller 9 is the same as in Example 1, and will not be described again here.

[0055] Unlike Embodiment 1, external terminals 8 are connected to both ends of the controller 9. A 10K resistor and a step-down chip are connected in series between the external terminals 8 and the controller 9 on one side. The step-down chip converts the 24V power supply to 3.3V. The digital input module 7 corresponds to the contactor on the control cabinet, and its external terminals 8 are connected to the normally open contacts of the contactor's auxiliary contacts.

[0056] If the normally open contact of the contactor's auxiliary contact closes, a closing signal can be detected from the controller 9. This is used to detect whether the contactor's auxiliary contact is engaged.

[0057] The detection principle is to internally supply 3.3V to one of the external terminals (the left terminal in this embodiment), and then detect the status of the other external terminal. If voltage can be detected, it means that the contactor auxiliary contact is engaged.

[0058] Example 6

[0059] This embodiment provides a non-intrusive HVAC system control device, including:

[0060] The main controller 1 has a combined power supply and Homebus communication port and is connected to an external power supply and communication line 2. In this embodiment, the power supply and communication line 2 is a four-core wire, with two cores used for power supply and the other two cores used for Homebus communication. The main controller 1 outputs DC 24V, which powers all modules through the four-core wire. The four-core wire carries both power and data, so the modules do not need independent power supply interfaces. During construction, only one cable needs to be run from the main controller 1 to connect all modules to complete the power supply and communication connection.

[0061] The control cabinet in this embodiment has a start button, a stop button, an AC indicator light, a DC indicator light, and a contactor.

[0062] As described in Example 1, the external wiring terminal 8 of the normally open control module 3 is connected to both ends of the start button as another start switch.

[0063] As described in Example 2, the external wiring terminal 8 of the normally closed control module 4 is connected to the stop button mounting circuit as another stop switch.

[0064] As described in Example 3, the external wiring terminal 8 of the AC control module is connected to both ends of the AC indicator light.

[0065] As described in Example 4, the external wiring terminal 8 of the DC control module is connected to both ends of the DC indicator light.

[0066] As described in Example 5, the external wiring terminal 8 of the digital input module is connected to both ends of the normally open contact of the contactor auxiliary contact;

[0067] As described in Examples 1, 2, 3, 4, and 5, the power supply and communication interfaces 10 of the control modules are all connected in parallel to the power supply and communication line 2. Figure 1 As shown. It uses wired communication, which has strong anti-interference capabilities, making it more suitable for industrial environments and providing more stable communication.

[0068] The main controller 1 can automatically assign addresses to the control modules it manages, and can select to control a specific module based on the address during control.

[0069] This embodiment adopts a "main controller + multiple control modules" architecture. Each control module is connected in parallel via a four-core cable including a power supply line and an HBS bus. The control modules are further subdivided into normally open control modules, normally closed control modules, AC control modules, DC control modules, and digital input modules. It supports flexible configuration of the number and type of control modules according to on-site requirements, realizing the simulation operation of the original control cabinet switches / buttons and the real-time acquisition of indicator light / contact status.

[0070] Four-core chain cabling simplifies construction, reduces the amount of cable used compared to traditional solutions, supports the expansion and hot-swapping of multiple control modules, and is suitable for the intelligent transformation of existing building HVAC equipment, significantly reducing transformation costs and construction difficulty.

[0071] The main controller 1 also has independent Homebus communication interface 12 and 485 communication interface 11. These are primarily used for communication with other devices in the field, such as frequency converters or temperature and humidity sensors. It also supports communication with higher-level devices; multiple main controllers may exist in the field, and a central control unit is located above each main controller for unified management of all main controllers.

[0072] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A control module, characterized in that, It has a built-in slave controller and external power supply and communication interface and external wiring terminal. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in normally open relay, as well as an input circuit formed by a coil connected to the slave controller and an output circuit formed by a normally open contact connected to the external wiring terminal.

2. A control module, characterized in that It has a built-in slave controller and external power supply and communication interface and external wiring terminal. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in normally closed relay, as well as an input circuit formed by a coil connected to the slave controller and an output circuit formed by a normally closed contact connected to the external wiring terminal.

3. A control module, characterized in that It has a built-in slave controller and external power supply and communication interface and external wiring terminal. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in AC normally open relay, as well as an output circuit formed by the normally open contact connected to the slave controller and an input circuit formed by the coil connected to the external wiring terminal.

4. A control module, characterized in that It has a built-in slave controller and an external power supply and communication interface and external wiring terminals. The power supply and communication interface is connected to the slave controller. The control module body also has a built-in DC normally open relay, as well as an output circuit formed by the normally open contact connected to the slave controller and an input circuit formed by the coil connected to the external wiring terminals.

5. A control module, characterized in that, It has a built-in slave controller and an external power supply and communication interface and external wiring terminals. The power supply and communication interface is connected to the slave controller, and the two ends of the slave controller are connected to the external wiring terminals.

6. A non-invasive heating, ventilation, and air conditioning system control device, comprising: include: The main controller has a combined power supply and Homebus communication port and can be connected to an external power supply and communication cable; The control cabinet has a start button and a stop button. The external wiring terminals of the control module as described in claim 1 are connected to both ends of the start button as another start switch. The external wiring terminals of the control module as described in claim 2 are connected to the stop button mounting circuit as another stop switch. The power supply and communication interfaces of the control module as described in claims 1 and 2 are both connected to the power supply and communication lines.

7. A non-invasive HVAC system control device as in claim 6, wherein, The control cabinet also has AC indicator lights and DC indicator lights; the external wiring terminals of the control module as described in claim 3 are connected to both ends of the AC indicator lights, and the external wiring terminals of the control module as described in claim 4 are connected to both ends of the DC indicator lights; the power supply and communication interfaces of the control module as described in claims 3 and 4 are both connected to the power supply and communication lines.

8. A non-invasive heating, ventilation and air conditioning system control device as defined in claim 7, wherein, The control cabinet also includes a contactor, wherein the external wiring terminal of the control module as described in claim 5 is connected to both ends of the normally open contact of the auxiliary contact of the contactor; and the power supply communication interface of the control module as described in claim 5 is connected to the power supply communication line.

9. A non-invasive HVAC system control device as in claim 6, wherein, The main controller is also equipped with independent Homebus communication interface and 485 communication interface.

10. A non-invasive HVAC system control device as in claim 6, wherein, The power supply and communication line is a four-core line, with two cores used for power supply and the other two cores used for Homebus communication.

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