A respirator heating control device

Abstract

The application provides a respirator heating control device, and belongs to the technical field of heating devices.The respirator heating control device comprises a respirator heating controller, which is internally provided with a respirator heating control panel, a heating driving board, a respirator heating control system and a temperature sensor; the heating driving board is connected with the respirator heating control system and the temperature sensor; the temperature sensor is used for detecting external environmental temperature changes and transmitting the changes to the respirator heating control panel; the respirator heating control panel controls the working state of a driving relay in the heating driving board according to signal changes of the temperature sensor, so as to control the working state of the respirator heating control system.The application controls the working state of the respirator heating control system by the temperature sensor according to external environmental changes, and controls the working state of the driving relay according to signal changes of the temperature sensor, so as to realize the automatic heating control function of the respirator.

Description

Technical Field

[0001] This invention relates to heating devices, and more particularly to a respirator heating control device. Background Technology

[0002] Existing ventilators lack automatic temperature regulation, which can cause discomfort to users in low-temperature conditions. Given the limitations of current products, improvements are necessary. Summary of the Invention

[0003] In view of this, in order to overcome the shortcomings of the existing technology, the present invention provides a ventilator heating control device. By using a temperature sensor to control the operation of the drive relay according to the changes in the external environment, the ventilator heating control board controls the operation of the ventilator heating control system based on the signal changes of the temperature sensor, thereby realizing the automatic heating control function of the ventilator.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A respirator heating control device, comprising: The ventilator heating controller contains a ventilator heating control board, a heating drive board, a ventilator heating control system, and a temperature sensor. The ventilator heating control board is equipped with: The power control and protection unit is used to provide stable power management for the respirator heating control device; The temperature sensor control unit is connected to the temperature sensor, receives the signal of external ambient temperature change detected by the temperature sensor, and transmits the signal to the ventilator heating control board for temperature judgment and heating control. The temperature control reference unit employs a comparison circuit consisting of four voltage comparators. Three of these comparators are used for temperature detection and control, while one is used for open-circuit or short-circuit protection detection of the temperature sensor. A drive signal is output through a transistor control circuit. This temperature control reference unit determines whether the external ambient temperature is lower or higher than a set temperature threshold, thereby deciding whether to start or stop heating. Temperature sensor open-circuit or short-circuit protection unit; The temperature control reference unit uses a comparison circuit composed of four voltage comparators, of which three voltage comparators are used for temperature detection and control, one voltage comparator is used for open circuit or short circuit protection detection of the temperature sensor, and outputs a drive signal through a transistor control circuit. The heating drive board is connected to the ventilator heating control system and the temperature sensor. The ventilator heating control board controls the working state of the drive relay inside the heating drive board according to the signal change of the temperature sensor, thereby controlling the working state of the ventilator heating control system.

[0005] Preferably, the heating drive plate is also provided with an overload protection fuse.

[0006] Preferably, the ventilator heating control system includes a heating element.

[0007] Preferably, the power supply for the respirator heating control device is 24V.

[0008] Preferably, the temperature sensor is an NTC thermistor.

[0009] Preferably, the open-circuit or short-circuit protection detection of the temperature sensor includes: when the temperature sensor experiences an open-circuit or short-circuit fault, the corresponding voltage comparator detects the abnormal input signal and flips its output, controlling the transistor control circuit to cut off the output of the drive relay, thereby stopping heating.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The ventilator heating control device provided by the present invention uses a temperature sensor to control the working state of the drive relay according to the changes in the external environment. This controls the working state of the ventilator heating control system and thus realizes the automatic heating control function of the ventilator.

[0011] This invention uses a relay to drive the load, and the relay is capable of handling high-power operating loads. In practical use, it meets the requirements of the ventilator heating control system and also demonstrates good safety and reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0014] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top or bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved or connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0015] like Figure 1 As shown, the present invention provides a respirator heating control device, comprising: The ventilator heating controller internally includes a ventilator heating control board, a heating drive board, a ventilator heating control system, and a temperature sensor. The ventilator heating control board, heating drive board, and ventilator heating control system can all be selected from commercially available standard control boards and drive boards; there are no special requirements.

[0016] The ventilator heating control board is equipped with: The power control and protection unit is used to provide stable power management for the respirator heating control device; The temperature sensor control unit is connected to the temperature sensor, receives the signal of external ambient temperature change detected by the temperature sensor, and transmits the signal to the ventilator heating control board for temperature judgment and heating control. The temperature control reference unit employs a comparison circuit consisting of four voltage comparators. Three of these comparators are used for temperature detection and control, while one is used for open-circuit or short-circuit protection detection of the temperature sensor. A drive signal is output through a transistor control circuit. This temperature control reference unit determines whether the external ambient temperature is lower or higher than a set temperature threshold, thereby deciding whether to start or stop heating. Temperature sensor open-circuit or short-circuit protection unit; The temperature control reference unit uses a comparison circuit composed of four voltage comparators, of which three voltage comparators are used for temperature detection and control, one voltage comparator is used for open circuit or short circuit protection detection of the temperature sensor, and outputs a drive signal through a transistor control circuit. The heating drive board is connected to the ventilator heating control system and the temperature sensor. The ventilator heating control board controls the operating state of the drive relay inside the heating drive board according to the signal changes from the temperature sensor, thereby controlling the operating state of the ventilator heating control system. Specifically, the temperature sensor control unit is connected to the temperature sensor, receives the external ambient temperature change signal detected by the temperature sensor, and transmits the signal to the ventilator heating control board. The ventilator heating control board then controls the operating state of the drive relay inside the heating drive board according to the signal changes, thereby controlling the operating state of the ventilator heating control system and realizing the automatic heating control function of the ventilator.

[0017] This invention uses a temperature sensor to detect changes in the external ambient temperature and transmits the data to the ventilator heating control board. When the external ambient temperature changes below a threshold, the ventilator heating control board controls the activation of the drive relay inside the heating drive board, thereby controlling the heating element of the ventilator heating control system to heat up.

[0018] In this invention, the heating drive plate is also provided with an overload protection fuse.

[0019] In this invention, the ventilator heating control system includes a heating element, wherein the heating element is preferably a heater.

[0020] In this invention, the power supply for the respirator heating control device is 24V.

[0021] In this invention, the temperature sensor is an NTC thermistor.

[0022] The ventilator heating controller of the present invention has a 3-pin male connector and a 3-pin female connector. The ventilator control board and the heating drive board can be connected to the ventilator heating control system and the temperature sensor through the two connectors, thereby controlling the working state of the ventilator heating control system according to changes in the external environment.

[0023] In this invention, the temperature control reference unit specifically employs a 4-channel voltage comparator and transistor control circuit (LM339 model). Three voltage comparators are used for temperature detection and control, and one voltage comparator is used for open-circuit or short-circuit protection detection of the temperature sensor, thereby controlling the operation of the ventilator heating control system. The heating drive board internally includes one overload protection fuse and one drive relay. When the load on the ventilator heating controller is too high, the relay current increases, reaching the fuse's breaking current. After the fuse blows, the power supply is cut off, thus protecting the ventilator heating controller system from damage. This design satisfies the requirement of high heating load power while simultaneously protecting the ventilator heating control system from damage.

[0024] In this invention, the open-circuit or short-circuit protection detection of the temperature sensor includes a current-limiting resistor, a pull-up resistor, a filter capacitor, and the aforementioned voltage comparator connected in series in the temperature sensor input circuit. When the temperature sensor is working normally, the output of the aforementioned voltage comparator maintains the heating-allowed state, and the transistor control circuit normally drives the relay of the heating drive board to work. When the temperature sensor experiences an open-circuit or short-circuit fault, the voltage at the temperature sensor input pin changes abnormally. After detecting the abnormality, the aforementioned voltage comparator flips its output, and the power supply circuit driving the relay is cut off through the transistor control circuit, thereby stopping the heating and realizing safety protection under temperature sensor fault conditions.

[0025] The entire device of this invention is powered by 24V, and the power control circuit provides operating voltage to the temperature sensor control unit, the temperature control reference unit, and the temperature sensor open-circuit or short-circuit protection unit. The power control unit provides rated voltage to different components, ensuring the entire circuit is safe, reliable, and operates stably.

[0026] The voltage comparator (LM339), transistor, relay, and fuse in this invention are common components and will not be described in detail here. They can be selected as needed.

[0027] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A respirator heating control device, characterized in that, include: The ventilator heating controller contains a ventilator heating control board, a heating drive board, a ventilator heating control system, and a temperature sensor. The ventilator heating control board is equipped with: The power control and protection unit is used to provide stable power management for the respirator heating control device; The temperature sensor control unit is connected to the temperature sensor, receives the signal of external ambient temperature change detected by the temperature sensor, and transmits the signal to the ventilator heating control board for temperature judgment and heating control. The temperature control reference unit uses a comparison circuit composed of four voltage comparators, of which three voltage comparators are used for temperature detection and control, and one voltage comparator is used for open circuit or short circuit protection detection of the temperature sensor. The drive signal is output through a transistor control circuit. The temperature control reference unit is used to determine whether the external ambient temperature is lower or higher than the set temperature threshold, thereby deciding whether to start or stop heating; as well as Temperature sensor open-circuit or short-circuit protection unit; The temperature control reference unit uses a comparison circuit composed of four voltage comparators, of which three voltage comparators are used for temperature detection and control, one voltage comparator is used for open circuit or short circuit protection detection of the temperature sensor, and outputs a drive signal through a transistor control circuit. The heating drive board is connected to the ventilator heating control system and the temperature sensor. The ventilator heating control board controls the working state of the drive relay inside the heating drive board according to the signal change of the temperature sensor, thereby controlling the working state of the ventilator heating control system.

2. The respirator heating control device according to claim 1, characterized in that, The heating drive board is also equipped with an overload protection fuse.

3. The respirator heating control device according to claim 1, characterized in that, The ventilator heating control system includes a heating element.

4. The respirator heating control device according to claim 1, characterized in that, The respirator heating control device is powered by 24V.

5. A respirator heating control device according to claim 1, characterized in that, The temperature sensor is an NTC thermistor.

6. The respirator heating control device according to claim 1, characterized in that, The open-circuit or short-circuit protection detection of the temperature sensor includes: when the temperature sensor experiences an open-circuit or short-circuit fault, the voltage comparator used for open-circuit or short-circuit protection detection detects the abnormal temperature sensor input signal and flips its output, controlling the transistor control circuit to cut off the output of the drive relay of the heating drive board, thereby stopping heating.

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