Variable power heat exchanger control device

Abstract

The utility model belongs to the field of movable air conditioners, and relates to a variable-power heat exchanger control device which comprises a single chip microcomputer, and a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplification circuit and a temperature alarm circuit which are all connected with the single chip microcomputer, the signal isolation circuit is used for isolating signals among the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplification circuit and the voltage temperature alarm circuit to prevent electrical interference, the interface circuit is used for connecting the heat exchanger control device with external equipment, and the relay control amplification circuit is used for amplifying a control signal. Therefore, the relay is driven to perform on-off operation to control start-stop and rotating speed of the heat exchanger. The fan can be efficiently, safely and intelligently controlled, and stable and reliable wind power support is provided for various application scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to mobile air conditioning technical field, more specifically, relate to a variable power heat exchanger control device. BACKGROUND

[0002] With the development and progress of technology, many heat exchanger fans on the market have started to have protective circuits and casings. According to different user needs, a variety of products that meet user needs have also emerged. But different products still cannot meet people's higher needs. Products are constantly improving in such an environment, and people are constantly creating new products.

[0003] In the prior art, the control panel circuit is not comprehensive and perfect enough. SUMMARY

[0004] In view of the above defects of the prior art, the utility model provides a variable power heat exchanger control device, which comprises: a single-chip microcomputer, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplification circuit and a temperature alarm circuit, all of which are connected to the single-chip microcomputer; the voltage power supply circuit is used to supply power to the heat exchanger control device; the signal isolation circuit is used to isolate the signals between the voltage power supply circuit, a voltage signal isolation circuit, a voltage interface circuit, a voltage relay control amplification circuit, a voltage motor drive circuit, a voltage serial port transceiver circuit and the voltage temperature alarm circuit, to prevent electrical interference; the interface circuit is used to connect the heat exchanger control device to external equipment; the relay control amplification circuit is used to amplify the control signal, so as to drive the relay to perform switching operation, control the start-stop and speed of the fan; the motor drive circuit is used to adjust the operating state of the motor according to the control signal, to realize control of the fan; the serial port transceiver circuit is used to transmit and receive data through the serial port, so that the device communicates with the host computer, realizes real-time transmission of data and remote control; the temperature alarm circuit is used to trigger an alarm and remind the user to handle it in time once an abnormal environmental temperature is detected, to prevent the fault from expanding. Preferably, the single-chip microcomputer is N32G030C8L7.

[0005] Preferably, the voltage power supply circuit comprises a direct current 48V-to-direct current 24V power supply circuit and a 24V-to-3.3V power supply circuit.

[0006] Preferably, the signal isolation circuit comprises that the anode of the light-emitting diode of the dual-channel high-speed photoelectric isolator U3 is connected with one end of the resistor R33, the anode of the light-emitting diode of the dual-channel high-speed photoelectric isolator U12 is connected with one end of the resistor R36, the anode of the light-emitting diode of the dual-channel high-speed photoelectric isolator U4 is connected with one end of the resistor R38, the anode of the light-emitting diode of the dual-channel high-speed photoelectric isolator U8 is connected with the resistor R40, the anode of the light-emitting diode of the dual-channel high-speed photoelectric isolator U6 is connected with the resistor R39, and the anode of the light-emitting diode of the dual-channel high-speed photoelectric isolator U10 is connected with the resistor R41.

[0007] Preferably, the interface circuit comprises a DB15 terminal.

[0008] Preferably, the relay control amplification circuit comprises that one end of the relay K1A is connected with the collector of the triode Q1, the emitter of the triode Q1 is connected with one end of the resistor R22 and grounded, and the base of the triode Q1 is connected with the other end of the resistor R22 and one end of the resistor R2 respectively; one end of the relay K5A is connected with the collector of the triode Q6, the emitter of the triode Q6 is connected with one end of the resistor R27 and grounded, and the base of the triode Q6 is connected with the other end of the resistor R27 and one end of the resistor R12 respectively; one end of the relay K2A is connected with the collector of the triode Q4, the emitter of the triode Q4 is connected with one end of the resistor R25 and grounded, and the base of the triode Q4 is connected with the other end of the resistor R25 and one end of the resistor R8 respectively; one end of the relay K4A is connected with the collector of the triode Q8, the emitter of the triode Q8 is connected with one end of the resistor R29 and grounded, and the base of the triode Q8 is connected with the other end of the resistor R29 and one end of the resistor R16 respectively.

[0009] Preferably, the temperature alarm circuit comprises that one end of the relay K3A is connected with the collector of the triode Q2, the emitter of the triode Q2 is connected with one end of the resistor R23 and grounded, and the base of the triode Q2 is connected with one end of the resistor R3 and the other end of the resistor R23 respectively, and U13 and its peripheral circuit.

[0010] Preferably, the device is further provided with a fan air outlet, and the fan air outlet is arranged on the periphery of the fan.

[0011] The heat exchanger control device has the following beneficial effects: the single-chip microcomputer, the voltage power supply circuit, the signal isolation circuit, the interface circuit, the relay control amplification circuit and the temperature alarm circuit connected with the single-chip microcomputer are arranged, the voltage power supply circuit is used for supplying power for the heat exchanger control device, the signal isolation circuit is used for isolating signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplification circuit and the voltage temperature alarm circuit, electrical interference is prevented, the interface circuit is used for connecting external equipment with the heat exchanger control device, the relay control amplification circuit is used for amplifying control signals, so that the relay is driven to perform switching operation, the rotating speed of the fan is controlled, and the temperature alarm circuit is used for triggering alarm and reminding the user to handle in time once overvoltage or overcurrent abnormal conditions of the fan are detected, so that fault expansion is prevented; the heat exchanger can be efficiently, safely and intelligently controlled, and stable and reliable wind power support is provided for various application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in the drawings without creative labor. The present application will be further described in combination with the drawings and embodiments. In the drawings:

[0013] Figure 1 is a circuit composition schematic diagram of the heat exchanger control device of the present application;

[0014] Figure 2 is a voltage power supply circuit diagram in the heat exchanger control device of the present application;

[0015] Figure 3 is a signal isolation circuit diagram in the heat exchanger control device of the present application;

[0016] Figure 4 is an interface circuit diagram in the heat exchanger control device of the present application;

[0017] Figure 5 is a relay control amplification circuit diagram in the heat exchanger control device of the present application;

[0018] Figure 6 is an on-board temperature sensor circuit diagram in the heat exchanger control device of the present application;

[0019] Figure 7 is a single-chip microcomputer schematic diagram in the heat exchanger control device of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0021] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0022] In addition, if the embodiments of the present application involve descriptions of "first", "second" and the like, the descriptions of "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope required by the present application.

[0023] Figure 1 is a circuit composition schematic diagram of the heat exchanger control device of the present application; Figure 2 is a voltage power supply circuit diagram in the heat exchanger control device of the present application; Figure 3 is a signal isolation circuit diagram in the heat exchanger control device of the present application; Figure 4 is an interface circuit diagram in the heat exchanger control device of the present application; Figure 5 is a relay control amplification circuit diagram in the heat exchanger control device of the present application; Figure 6 is an on-board temperature sensor circuit diagram in the heat exchanger control device of the present application; Figure 7 is a single-chip microcomputer schematic diagram in the heat exchanger control device of the present application. Please refer to Figures 1-7In the heat exchanger control device provided by the first embodiment of the utility model, at least includes, singlechip, voltage power supply circuit, signal isolation circuit, interface circuit, relay control amplification circuit, temperature alarm circuit connected with singlechip, voltage power supply circuit is used for power supply for heat exchanger control device, signal isolation circuit is used for isolating the signal between voltage power supply circuit, voltage signal isolation circuit, voltage interface circuit, voltage relay control amplification circuit and voltage temperature alarm circuit, prevent electrical interference, interface circuit is used for heat exchanger control device connects external equipment, relay control amplification circuit is used for amplifying control signal, to drive relay to carry out switching operation, control the work and rotational speed of fan, motor drive circuit is used for adjusting the operating state of motor according to control signal, realizes the control to fan, temperature alarm circuit is used for triggering alarm as soon as detecting that the fan appears overvoltage or overcurrent abnormal condition, reminds user to handle in time, prevents fault expansion. In specific implementation, singlechip can be but not limited to N32G030C8L7. In the embodiment, singlechip is selected as N32G030C8L7.

[0024] Voltage power supply circuit includes direct current 48V conversion direct current 24V power supply circuit, 24V conversion 3.3V power supply circuit. In specific implementation, voltage power supply circuit provides power supply voltage for singlechip, signal isolation circuit, interface circuit, relay control amplification circuit and temperature alarm circuit by transforming commercial power into voltage. Voltage power supply circuit provides stable and reliable electric energy, ensures that the whole system can continuously and stably operate.

[0025] Signal isolation circuit includes that the anode of the light emitting diode of double channel high speed photoelectric isolator U3 is connected with the one end of resistance R33, the anode of the light emitting diode of double channel high speed photoelectric isolator U12 is connected with the one end of resistance R36, the anode of the light emitting diode of double channel high speed photoelectric isolator U4 is connected with the one end of resistance R38, the anode of the light emitting diode of double channel high speed photoelectric isolator U8 is connected with resistance R40, the anode of the light emitting diode of double channel high speed photoelectric isolator U6 is connected with resistance R39, the anode of the light emitting diode of double channel high speed photoelectric isolator U10 is connected with resistance R41. Double channel high speed photoelectric isolator U3, U4, U6, U8, U12 can be EL357N. Signal isolation circuit isolates the signal between different circuits, effectively prevents electrical interference, and ensures the purity and accuracy of the signal.

[0026] Photoelectric isolator is a kind of device for isolating electrical signal, it can isolate electrical signal between input signal and output signal, to protect controlled equipment, improve the stability and reliability of system. Photoelectric isolator has high-speed response, high isolation voltage, low power consumption and small size etc.

[0027] EL357N is a dual-channel high-speed opto-isolator, which is composed of a photodiode and a photosensitive transistor. The photodiode is a device that can convert light energy into electrical energy, and the photosensitive transistor is a device that can convert light energy into current. The working principle of EL357N is to emit light signals by the photodiode, and then receive the light signals by the photosensitive transistor and convert them into current signals, realizing the isolation between the input and output signals.

[0028] The working process of EL357N is as follows: input signal isolation, when the input signal is applied to the input end of EL357N, the input photodiode is excited and emits light signals of a certain intensity. Light signal transmission, the light signal is transmitted in the optical coupling medium inside the optocoupler, which is usually an organic material transparent to light. Light signal detection, the light signal reaches the output photosensitive transistor, which is excited and generates a corresponding current signal. Output signal isolation, the output signal is transmitted to the output end through the current signal of the photosensitive transistor, realizing the electrical isolation between the input and output signals.

[0029] The interface circuit includes DB15 terminals. The interface circuit serves as the connection interface between the external configuration and the mainboard, and its working principle is to exchange data with the external configuration. The interface circuit is a bridge connecting external devices and internal circuits, which enables the heat exchanger control device to seamlessly interface with external systems.

[0030] The relay control amplification circuit comprises: one end of a relay K1A is connected with a collector of a transistor Q1, an emitter of the transistor Q1 is connected with one end of a resistor R22 and grounded, and a base of the transistor Q1 is connected with the other end of the resistor R22 and one end of a resistor R2 respectively; one end of a relay K5A is connected with a collector of a transistor Q6, an emitter of the transistor Q6 is connected with one end of a resistor R27 and grounded, and a base of the transistor Q6 is connected with the other end of the resistor R27 and one end of a resistor R12 respectively; one end of a relay K2A is connected with a collector of a transistor Q4, an emitter of the transistor Q4 is connected with one end of a resistor R25 and grounded, and a base of the transistor Q4 is connected with the other end of the resistor R25 and one end of a resistor R8 respectively; one end of a relay K4A is connected with a collector of a transistor Q8, an emitter of the transistor Q8 is connected with one end of a resistor R29 and grounded, and a base of the transistor Q8 is connected with the other end of the resistor R29 and one end of a resistor R16 respectively. The relay can quickly and accurately turn on or turn off the circuit according to the change of the external signal, so as to realize the automatic control of the circuit. This makes the circuit system be able to respond to the change of the external environment and improve the operation efficiency. The role of the amplifier is to enhance the signal. In the circuit system, the signal may be weakened due to the transmission distance, equipment loss and the like. At this time, the amplifier can amplify the weak signal, so that it can be transmitted smoothly in the circuit. This is very important for maintaining the stability and accuracy of the signal. The resistor plays a role in limiting current, dividing voltage and stabilizing the circuit. The resistor can accurately control the size of the current to prevent the circuit from being damaged due to excessive current. At the same time, the resistor can also realize the voltage dividing function, which can distribute the voltage to each circuit according to a certain proportion, so that each circuit can obtain stable working voltage. The relay control amplification circuit is responsible for amplifying the weak control signal, so as to drive the relay to perform switching operation, control the start and stop of the fan and the rotating speed of the fan.

[0031] The temperature alarm circuit comprises: one end of a relay K3A is connected with a collector of a transistor Q2, an emitter of the transistor Q2 is connected with one end of a resistor R23 and grounded, and a base of the transistor Q2 is connected with one end of a resistor R3 and the other end of the resistor R23 respectively, and U13 and peripheral circuits thereof. When the fan overvoltage or overcurrent occurs, the CPU gives PC13 a high level, and the relay works, so as to realize the alarm purpose.

[0032] In specific implementation, the heat exchanger control device further comprises an air outlet, and the air outlet is arranged outside the fan. The heat exchanger control device can further comprise a temperature sensor. The temperature sensor is used for sensing the concentration of the ambient temperature. When the fan is turned on, the sensor can also sense the height of the ambient temperature, so as to control the rotating speed of the fan; the higher the temperature, the faster the fan rotates, and vice versa.

[0033] The utility model discloses a heat exchanger control device, including single-chip microcomputer, voltage power supply circuit, signal isolation circuit, interface circuit, relay control amplification circuit and temperature alarm circuit, voltage power supply circuit, signal isolation circuit, interface circuit, relay control amplification circuit and temperature alarm circuit are connected with single-chip microcomputer, voltage power supply circuit is used for the power supply for heat exchanger control device, signal isolation circuit is used for the signal between voltage power supply circuit, voltage signal isolation circuit, voltage interface circuit, voltage relay control amplification circuit and voltage temperature alarm circuit, prevents electrical interference, interface circuit is used for heat exchanger control device connects external equipment, relay control amplification circuit is used for the amplification of control signal, to drive relay to carry out switching operation, controls the operation and rotational speed of fan, temperature alarm circuit is used for the detection of fan appearance overvoltage or overcurrent abnormal condition, and triggers alarm, reminds user in time processing, prevents the expansion of fault, can carry out efficient, safe, intelligent control to fan, provides stable and reliable wind power support for various application scenarios.

[0034] The utility model is described according to specific embodiment, but the person skilled in the art should understand that various changes and equivalent replacement can be carried out without departing from the scope of the utility model. In addition, in order to adapt to the specific occasion of the utility model technology, the utility model can be modified in many ways without departing from its protection scope. Therefore, the utility model is not limited to the specific embodiment disclosed herein, but includes all the embodiments falling into the protection scope of the claims.

Claims

1. A variable power heat exchanger control device, characterized by, The application relates to a heat exchanger control device. The single-chip microcomputer is N32G030C8L7.

2. The heat exchanger control device according to claim 1, characterized by The voltage power supply circuit comprises a direct-current 48V-to-direct-current 24V power supply circuit and a 24V-to-3.3V power supply circuit.

3. The heat exchanger control device of claim 1, wherein The signal isolation circuit comprises a connection of an anode of a light-emitting diode of a double-channel high-speed photoelectric isolator U3 with one end of a resistor R33, a connection of an anode of a light-emitting diode of a double-channel high-speed photoelectric isolator U12 with one end of a resistor R36, a connection of an anode of a light-emitting diode of a double-channel high-speed photoelectric isolator U4 with one end of a resistor R38, a connection of an anode of a light-emitting diode of a double-channel high-speed photoelectric isolator U8 with a resistor R40, a connection of an anode of a light-emitting diode of a double-channel high-speed photoelectric isolator U6 with a resistor R39, and a connection of an anode of a light-emitting diode of a double-channel high-speed photoelectric isolator U10 with a resistor R41.

4. The heat exchanger control device of claim 1, wherein The interface circuit comprises a DB15 terminal.

5. The control apparatus for a heat exchanger according to claim 1, wherein The relay control amplification circuit comprises a connection of one end of a relay K1A with a collector of a triode Q1, a connection of an emitter of the triode Q1 with one end of a resistor R22 and grounding, and a connection of a base of the triode Q1 with the other end of the resistor R22 and one end of a resistor R2; a connection of one end of a relay K5A with a collector of a triode Q6, a connection of an emitter of the triode Q6 with one end of a resistor R27 and grounding, and a connection of a base of the triode Q6 with the other end of the resistor R27 and one end of a resistor R12; a connection of one end of a relay K2A with a collector of a triode Q4, a connection of an emitter of the triode Q4 with one end of a resistor R25 and grounding, and a connection of a base of the triode Q4 with the other end of the resistor R25 and one end of a resistor R8; and a connection of one end of a relay K4A with a collector of a triode Q8, a connection of an emitter of the triode Q8 with one end of a resistor R29 and grounding, and a connection of a base of the triode Q8 with the other end of the resistor R29 and one end of a resistor R16.

6. The control apparatus for a heat exchanger according to claim 1, wherein The temperature alarm circuit comprises a connection of one end of a relay K3A with a collector of a triode Q2, a connection of an emitter of the triode Q2 with one end of a resistor R23 and grounding, and a connection of a base of the triode Q2 with one end of a resistor R3 and the other end of the resistor R23.

7. The control device for a heat exchanger according to any one of claims 1 to 6, wherein ​

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