A fire-fighting dual-speed fan controller

Abstract

The present invention discloses a fire-fighting dual-speed fan controller, comprising a controller housing and a control circuit arranged in the controller housing. The present invention adopts a two-wire input insurance to ensure the safety of the current input of the entire controller. The built-in power supply adopts an electronic switching power supply, which is more energy-saving, and one controller can be used to control two dual-speed fan control devices, saving resources. The present invention has an independent circuit for the signal output of each control device, with a low failure rate and convenient maintenance. At the same time, the present invention interlocks between different control signal output terminals of the same dual-speed fan control device to ensure the independent operation of the fire-fighting fan and the ordinary fan.

Description

Technical Field

[0001] The invention relates to the technical field of fan control, and in particular to a fire-fighting dual-speed fan controller. Background Art

[0002] The traditional fire fan control device adopts relay control, the equipment components are large in size, difficult to assemble, and the wire box frame is expensive; moreover, the control function of the traditional fire fan controller is relatively simple, and it can only realize the start and stop control of the fire fan, and each controller can only control a single fan control device. If there are multiple fan control devices on site, a large number of controllers are required for control, which consumes too much resources. Summary of the invention

[0003] The purpose of the present invention is to propose a fire-fighting dual-speed fan controller in response to the above-mentioned problems. The controller adopts a two-wire input fuse to ensure the safety of the current input of the entire controller. The power supply is built-in with an electronic switching power supply, which is more energy-efficient. One controller can control two dual-speed fan control devices, saving resources. The signal output of each control device of the present invention is an independent circuit, with a low failure rate and easy maintenance. At the same time, the present invention interlocks different control signal output terminals of the same dual-speed fan control device to ensure the independent operation of the fire-fighting fan and the ordinary fan.

[0004] A fire-fighting dual-speed fan controller comprises a controller housing and a control circuit arranged in the controller housing, wherein the control circuit comprises a CPU, an electronic switch built-in power supply for powering the entire control circuit, a key circuit connected to the CPU input end, a wrong phase protection circuit, a current sampling circuit, a detection circuit and a signal driving circuit; the control circuit also comprises a wrong phase fault indication circuit connected to the CPU output end, a first control signal output circuit, a second control signal output circuit, a third control signal output circuit, a fourth control signal output circuit, a fault alarm circuit, an operation indication circuit and a signal feedback circuit, wherein the first control signal output circuit and the second control signal output circuit are interlocked, and the third control signal output circuit and the fourth control signal output circuit are interlocked.

[0005] Furthermore, the signal driving circuit includes a first signal driving circuit and a second signal driving circuit.

[0006] Furthermore, the current sampling circuit includes a first current sampling circuit and a second current sampling circuit.

[0007] Furthermore, the detection circuit includes a first detection circuit and a second detection circuit.

[0008] Furthermore, the first detection circuit and the second detection circuit respectively include a fire damper detection circuit, a motor operation detection circuit and a motor overload detection circuit.

[0009] Furthermore, the operation indication circuit includes a normal power indicator light, a fault power indicator light, a manual indicator light, an automatic indicator light, a linkage indicator light, a fan fault indicator light, a fan start indicator light and a fan stop indicator light.

[0010] Furthermore, the signal feedback circuit includes a wind pressure feedback circuit and an automatic feedback circuit.

[0011] Furthermore, the phase-loss protection circuit is used to step down the input three-phase AC voltage and convert it into a voltage signal that can be used for detection, and the phase-loss protection circuit is built into the control circuit.

[0012] The beneficial effects of the present invention are as follows: a two-wire input fuse is used to ensure the safety of the current input of the entire controller; an electronic switching power supply is used in the built-in power supply, which is more energy-efficient; and one controller can be used to control two dual-speed fan control devices, saving resources; the signal output of each control device of the present invention is an independent circuit, with a low failure rate and convenient maintenance; at the same time, the present invention interlocks different control signal output terminals of the same dual-speed fan control device to ensure the independent operation of the fire-fighting fan and the ordinary fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a circuit block diagram of the present invention.

[0014] Figure 2 It is a circuit diagram of the signal driving circuit of the present invention.

[0015] Figure 3 It is a circuit diagram of the fire damper detection circuit of the present invention.

[0016] Figure 4 It is a circuit diagram of a motor operation detection circuit of the present invention.

[0017] Figure 5 The present invention is a circuit diagram of a motor overload detection circuit.

[0018] Figure 6 It is a circuit diagram of a control signal output circuit of the present invention.

[0019] Figure 7 It is a circuit diagram of the wind pressure feedback circuit of the present invention.

[0020] Figure 8 It is the circuit diagram of the automatic feedback circuit of the present invention.

[0021] Fig. 9 It is a circuit diagram of a phase error and missing protection circuit of the present invention. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a fire-fighting dual-speed fan controller includes a controller housing and a control circuit arranged in the controller housing, the control circuit includes a CPU, an electronic switch built-in power supply for powering the entire control circuit and a key circuit connected to the CPU input end, a wrong phase protection circuit, a current sampling circuit, a detection circuit and a signal driving circuit; the control circuit also includes a wrong phase fault indication circuit connected to the CPU output end, a first control signal output circuit, a second control signal output circuit, a third control signal output circuit, a fourth control signal output circuit, a fault alarm circuit, an operation indication circuit and a signal feedback circuit, the first control signal output circuit and the second control signal output circuit are interlocked, and the third control signal output circuit and the fourth control signal output circuit are interlocked.

[0024] The signal driving circuit includes a first signal driving circuit and a second signal driving circuit. The specific structure of the signal driving circuit is as follows: Figure 2 shown.

[0025] The current sampling circuit includes a first current sampling circuit and a second current sampling circuit.

[0026] The detection circuit includes a first detection circuit and a second detection circuit. The first detection circuit and the second detection circuit respectively include a fire damper detection circuit, a motor operation detection circuit and a motor overload detection circuit. The specific structures of the fire damper detection circuit, the motor operation detection circuit and the motor overload detection circuit are as follows: Figure 3 , 4 , as shown in Figure 5.

[0027] The specific structure of the control signal output circuit is as follows: Figure 6 shown.

[0028] The operation indication circuit includes a normal power indicator light, a fault power indicator light, a manual indicator light, an automatic indicator light, a linkage indicator light, a fan fault indicator light, a fan start indicator light and a fan stop indicator light.

[0029] The signal feedback circuit includes a wind pressure feedback circuit and an automatic feedback circuit. The specific structures of the wind pressure feedback circuit and the automatic feedback circuit are as follows: Figure 7 , 8 shown.

[0030] The button circuit, current sampling circuit, operation indication circuit and fault alarm circuit in the present invention are all commonly used circuits in this field, and their circuit structures are not repeated in this application. The first control signal output circuit of the present invention is used to control the high-speed fan of the first fan control device, the second control signal output circuit is used to control the low-speed fan of the first fan control device, the third control signal output circuit is used to control the high-speed fan of the second fan control device, and the fourth control signal output circuit is used to control the low-speed fan of the second fan control device. The interlocking between the first control signal output circuit and the second control signal output circuit and the interlocking between the third control signal output circuit and the fourth control signal output circuit are realized by a program preset in the CPU, and setting an electrical interlocking program in the CPU is a conventional technical means for those skilled in the art.

[0031] The phase failure protection circuit is used to step down the input three-phase AC voltage and convert it into a voltage signal that can be used for detection. The phase failure protection circuit is built into the control circuit. Its specific structure is as follows: Fig. 9 shown.

[0032] In this embodiment, a fire-fighting dual-speed fan controller is proposed, which adopts a two-wire input fuse to ensure the safety of the current input of the entire controller. The power supply is built-in with an electronic switching power supply, which is more energy-efficient, and one controller can be used to control two dual-speed fan control devices, saving resources. The signal output of each control device of the present invention is an independent circuit, with a low failure rate and easy maintenance. At the same time, the present invention interlocks between different control signal output terminals of the same dual-speed fan control device to ensure the independent operation of the fire-fighting fan and the ordinary fan.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fire-fighting dual-speed fan controller, characterized in that: The invention comprises a controller housing and a control circuit arranged in the controller housing, wherein the control circuit comprises a CPU, an electronic switch built-in power supply for powering the entire control circuit, a key circuit connected to the CPU input end, a phase error protection circuit, a current sampling circuit, a detection circuit and a signal driving circuit; the control circuit also comprises a phase error fault indication circuit connected to the CPU output end, a first control signal output circuit, a second control signal output circuit, a third control signal output circuit, a fourth control signal output circuit, a fault alarm circuit, an operation indication circuit and a signal feedback circuit, wherein the first control signal output circuit and the second control signal output circuit are interlocked, and the third control signal output circuit and the fourth control signal output circuit are interlocked; the signal driving circuit comprises a first signal driving circuit and a second signal driving circuit; the current sampling circuit comprises a first current sampling circuit and a second current sampling circuit; the detection circuit comprises a first detection circuit and a second detection circuit; the phase error protection circuit is used to step down the input three-phase AC voltage and convert it into a voltage signal that can be used for detection, and the phase error protection circuit is built in the control circuit.

2. A fire-fighting dual-speed fan controller according to claim 1, characterized in that: The first detection circuit and the second detection circuit respectively include a fire damper detection circuit, a motor operation detection circuit and a motor overload detection circuit.

3. A fire-fighting dual-speed fan controller according to claim 1, characterized in that: The operation indication circuit includes a power normal indicator light, a power fault indicator light, a manual indicator light, an automatic indicator light, a linkage indicator light, a fan fault indicator light, a fan start indicator light and a fan stop indicator light.

4. A fire-fighting dual-speed fan controller according to claim 1, characterized in that: The signal feedback circuit includes a wind pressure feedback circuit and an automatic feedback circuit.

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