Air conditioning system without main control board and communication base station control cabinet

Abstract

The invention provides an air conditioning system without a main control board and a communication base station control cabinet, and relates to the technical field of air conditioners. The system comprises a main power switch, a compressor driver, a compressor, a fan, a direct-current power supply, a relay and a control switch, the input end of the main power switch is connected with an external power supply; the output end of the main power switch is connected with the input end of the compressor driver; the output end of the compressor driver is connected with the compressor; the output end of the main power switch is also connected with the fan; the output end of the main power switch is further connected with the input end of a direct-current power source, a coil of a relay and a control switch are further connected between the positive electrode and the negative electrode of the output end of the direct-current power source in series, and a normally-open contact of the relay is connected to a driving loop of the compressor driver in series. The communication base station control cabinet can solve the problem that in the prior art, an air conditioner system main control board of a communication base station control cabinet is prone to electromagnetic interference, and heat dissipation reliability of communication equipment is affected.

Description

Technical Field

[0001] This invention relates to the field of air conditioning system technology, and in particular to an air conditioning system without a main control board and a communication base station control cabinet. Background Technology

[0002] Because the control cabinet of the communication base station located below the communication tower is in a complex and strong electromagnetic interference environment for a long time, the main control board of the traditional air conditioning system inside it integrates a highly precise microprocessor and digital communication lines. In this environment, it is extremely susceptible to electromagnetic interference, which can lead to program errors and seriously affect the operational reliability of the communication equipment's heat dissipation system.

[0003] While existing technologies offer solutions to improve anti-interference performance through software algorithm optimization, such designs do not fundamentally address the weakness of the main control board. Summary of the Invention

[0004] This invention provides a main control board-less air conditioning system and a communication base station control cabinet to solve the problem that the main control board of the air conditioning system in the prior art is susceptible to electromagnetic interference, which affects the heat dissipation reliability of communication equipment.

[0005] In a first aspect, embodiments of the present invention provide a main control board-less air conditioning system, including: a main power switch, a compressor driver, a compressor, a fan, a DC power supply, a relay, and a control switch; The input terminal of the main power switch is used to connect to an external power source; The output terminal of the main power switch is connected to the input terminal of the compressor driver, and the output terminal of the compressor driver is connected to the compressor. The output terminal of the main power switch is also connected to the fan; The output terminal of the main power switch is also connected to the input terminal of the DC power supply. The coil of the relay and the control switch are connected in series between the positive and negative terminals of the DC power supply output terminal. The normally open contact of the relay is connected in series in the drive circuit of the compressor driver.

[0006] In one possible implementation, the control switch includes: a local control switch and a remote control switch; The local control switch and the remote control switch are connected in parallel and then connected in series between the positive and negative terminals of the DC power supply output. The remote control switch is connected to a remote host computer for communication.

[0007] In one possible implementation, the main control board-less air conditioning system also includes: Hall sensors; The Hall sensor is located at the output terminal of the main power switch and is used to detect the power parameters of the main circuit. The power supply terminal of the Hall sensor is connected to the output terminal of the DC power supply; The Hall sensor is connected to a remote host computer for communication.

[0008] In one possible implementation, the fan includes: an evaporator fan and a condenser fan; The output terminals of the main power switch are connected to the evaporator fan and the condenser fan, respectively.

[0009] In one possible implementation, the compressor is a variable frequency compressor, and the compressor is communicatively connected to a remote host computer.

[0010] In one possible implementation, the compressor driver receives 48V DC power and outputs 380V three-phase AC power.

[0011] In one possible implementation, the DC power supply receives 48V DC input and outputs 24V DC output.

[0012] Secondly, embodiments of the present invention provide a communication base station control cabinet, including a main control board-less air conditioning system as described in the first aspect or any implementation thereof.

[0013] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows: The main control board-less air conditioning system of this invention includes a main power switch, a compressor driver, a compressor, a fan, a DC power supply, a relay, and a control switch. The input terminal of the main power switch is used to connect to an external power source. The output terminal of the main power switch is directly connected to the fan, ensuring continuous fan operation after power-on and preventing the compressor from running idle without cooling. The output terminal of the main power switch is connected to the input terminal of the compressor driver, and the output terminal of the compressor driver is connected to the compressor. The output terminal of the main power switch is connected to the input terminal of the DC power supply. The relay coil and the control switch are connected in series between the positive and negative terminals of the DC power supply output. The normally open contact of the relay is connected in series in the compressor driver's drive circuit. The control switch can control the relay coil to open and close, thus controlling the compressor's start and stop. The entire system eliminates the main control board, which is most susceptible to electromagnetic interference, and uses simple electrical logic circuits to directly drive key components, ensuring coordinated operation between the compressor and the fan, significantly improving stability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the air conditioning system without a main control board provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the communication base station control cabinet provided in an embodiment of the present invention. Detailed Implementation

[0015] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0016] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the core of the main control board-less air conditioning system disclosed in this invention lies in replacing the control function of the traditional main control board with hardware logic, fundamentally solving the technical problem of main control board failure under strong electromagnetic interference environment. Its specific composition and connection relationship are as follows: I. System Components The air conditioning system without a main control board includes: a main power switch QF0, a compressor driver VF, a compressor M1, a fan assembly (which may include, but is not limited to, an evaporator fan M2 and a condenser fan M3; this fan assembly is the core component for air conditioning heat dissipation and can be adapted to different power models according to heat dissipation requirements), a DC power supply G1, a relay KA1 (including a drive coil and normally open contacts, using an industrial-grade anti-interference relay suitable for wide-temperature operating environments), and a control switch (which can be a remote control switch 14 or a local control switch 24; both can be set simultaneously, supporting independent control or linkage switching to meet the operational needs of different scenarios). In the diagram, PE is the protective grounding wire for the electrical equipment.

[0018] Furthermore, the system supports communication between a remote host computer and the system's core components, enabling remote monitoring and precise control, for example: The remote host computer establishes a communication connection with the remote control switch 14 and remotely controls the start and stop status of the compressor M1 by sending switch signals; The remote host computer establishes a communication connection with the compressor driver VF, and remotely controls the operating power of the compressor M1 by adjusting the output frequency parameters of the driver to adapt to different heat dissipation load requirements. A Hall sensor H can be configured at the output of the main power switch. The power supply terminal of Hall sensor H is connected to the output terminal of DC power supply G1. A remote host computer establishes a communication connection with Hall sensor H to receive data such as total power supply current and equipment operating status collected by the Hall sensor in real time. The computer then uses the current change trend to determine whether the compressor M1 and the fan assembly are working properly.

[0019] II. Circuit Connection Relationships The input terminal of the main power switch QF0 is used to connect to an external 48V DC power supply (adapting to the standard power supply requirements of communication base stations, energy storage cabinets, and other scenarios). The output terminal of the main power switch QF0 is connected in series with the Hall sensor H to form the system's main power supply bus, enabling unified monitoring and on / off control of the power supply to the entire unit.

[0020] The main power supply bus has four outputs: The first path connects to the power input terminal of the compressor driver VF. The three-phase AC output terminal of the compressor driver VF is connected to the corresponding terminal of the compressor M1. The compressor driver VF is equipped with a start / stop dry contact interface CN10 (including CN10-1 and CN10-2) for compressor start / stop control. The second path is directly connected to the power input terminal of the evaporator fan M2, and the third path is directly connected to the power input terminal of the condenser fan M3, ensuring that the fan components are powered on synchronously with the main power supply. The fourth connection is to the input terminal of DC power supply G1. The output terminal of DC power supply G1 outputs a stable 24V DC power. The drive coil of relay KA1 and the control switch (remote control switch 14 and local control switch 24 are connected in parallel and then connected in series between the positive and negative terminals of the DC power supply output terminal, and the "local direct start" and "remote signal control" modes can be selected by switching the rotary switch RSW) at the same time. At the same time, the output terminal of DC power supply G1 is also connected to the power supply terminal of Hall sensor H to provide working power for relay coil and Hall sensor. The normally open contact of relay KA1 is connected in series between CN10-1 and CN10-2 of the start / stop dry contact interface CN10 of compressor driver VF to form a compressor start / stop control circuit.

[0021] III. Core Working Principle Power supply logic: After the external 48V DC power supply is closed by the main power switch QF0, it is first connected to the system's main power supply bus through the Hall sensor H. The Hall sensor H collects the total power supply current signal in real time, providing data support for monitoring the system's operating status. The main power supply bus synchronously supplies power to the compressor driver VF, evaporator fan M2, condenser fan M3, and DC power supply G1. Among them, DC power supply G1 converts the 48V DC power into a stable 24V DC power to power the control circuit components (relay KA1 coil, Hall sensor H), ensuring that the control circuit and the main power supply circuit work independently and do not interfere with each other. Compressor start / stop control: When the rotary switch RSW is switched to the corresponding mode, the control switch is closed, triggering the coil of relay KA1 to be energized and engaged. Its normally open contact connected in series in the dry contact interface CN10 closes accordingly. After receiving the start signal, the compressor driver VF converts the input 48V DC power into three-phase 380V AC power, driving the compressor M1 to slowly increase the frequency to the set speed according to the preset program and enter the constant speed refrigeration operation state. When the control switch module is disconnected, the coil of relay KA1 is de-energized, the normally open contact opens, the compressor driver VF stops outputting, and the compressor M1 gradually reduces the frequency and stops. Fan operation logic: Evaporator fan M2 and condenser fan M3 are directly powered through the main power supply bus without the need for additional control signals. This design enables synchronous operation as soon as the main power is turned on, ensuring that the compressor always has stable heat dissipation conditions and avoiding equipment damage due to insufficient heat dissipation.

[0022] IV. System Operation Logic In this embodiment, the system operation logic is controlled by the host computer, specifically as follows: The normal operating temperature range of target scenarios such as communication base station electrical control cabinets and equipment rooms is 18℃~22℃. Users can preset temperature control parameters through the host computer: 22℃ is set as the compressor start-up target temperature, and a 4℃ temperature hysteresis is set (i.e., 18℃ is the shutdown temperature); when the host computer detects that the ambient temperature is >22℃, it sends a switch start signal to the remote control switch 14 to trigger the compressor M1 to start cooling; when the ambient temperature drops to 18℃, the host computer sends a switch stop signal, and the compressor M1 stops running; when the ambient temperature rises to above 22℃ again, the above cycle is repeated to achieve automatic and stable temperature control; during the entire operation, the main power supply does not need to be interrupted, and the fan assembly continues to run, which not only ensures the reliability of heat dissipation but also reduces the start-up and shutdown losses of components. This invention completely eliminates the main control board, which is most susceptible to strong electromagnetic interference in traditional air conditioning systems. It implements core control functions through hardware logic, avoiding program errors caused by interference with the microprocessor and digital communication lines, thus improving system stability in strong electromagnetic environments like communication base stations. By adopting a hardware logic design that ensures the fan runs continuously and the compressor starts and stops in tandem, the compressor can only start when the fan assembly is operating normally, preventing overheating damage due to insufficient heat dissipation and extending the compressor's lifespan. The entire system has a simple and compact structure, reducing the complexity of the main control board and its associated circuits, resulting in a smaller overall size and easier installation in confined spaces. This system is low-cost and requires no complex software maintenance, has a low maintenance threshold, and significantly reduces the failure rate and maintenance costs. This system is particularly suitable for scenarios with extremely high requirements for air conditioning anti-interference and reliability, such as communication base station control cabinets and energy storage cabinets.

[0023] Figure 2This is a schematic diagram of the structure of the communication base station control cabinet provided in an embodiment of the present invention. The communication base station control cabinet 2 includes the main control board-less air conditioning system 21 as described above.

[0024] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A main control board-less air conditioning system, characterized in that, include: Main power switch, compressor driver, compressor, fan, DC power supply, relays and control switches; The input terminal of the main power switch is used to connect to an external power source; The output terminal of the main power switch is connected to the input terminal of the compressor driver, and the output terminal of the compressor driver is connected to the compressor. The output terminal of the main power switch is also connected to the fan; The output terminal of the main power switch is also connected to the input terminal of the DC power supply. The coil of the relay and the control switch are connected in series between the positive and negative terminals of the DC power supply output terminal. The normally open contact of the relay is connected in series in the drive circuit of the compressor driver.

2. The air conditioning system without a main control board according to claim 1, characterized in that, The control switch includes: a local control switch and a remote control switch; The local control switch and the remote control switch are connected in parallel and then connected in series between the positive and negative terminals of the DC power supply output. The remote control switch is connected to a remote host computer for communication.

3. The air conditioning system without a main control board according to claim 1, characterized in that, Also includes: Hall effect sensor; The Hall sensor is located at the output terminal of the main power switch and is used to detect the power parameters of the main circuit. The power supply terminal of the Hall sensor is connected to the output terminal of the DC power supply; The Hall sensor is connected to a remote host computer for communication.

4. The air conditioning system without a main control board according to any one of claims 1 to 3, characterized in that, The fan includes: an evaporator fan and a condenser fan; The output terminals of the main power switch are connected to the evaporator fan and the condenser fan, respectively.

5. The air conditioning system without a main control board according to any one of claims 1 to 3, characterized in that, The compressor is a variable frequency compressor, and the compressor is connected to a remote host computer.

6. The air conditioning system without a main control board according to any one of claims 1 to 3, characterized in that, The compressor driver receives 48V DC power and outputs 380V three-phase AC power.

7. The air conditioning system without a main control board according to any one of claims 1 to 3, characterized in that, The DC power supply takes in 48V DC and outputs 24V DC.

8. A communication base station control cabinet, characterized in that, Including the air conditioning system without a main control board as described in any one of claims 1 to 7.

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