Fire-proof air heating equipment

Abstract

The utility model discloses an anti-fire air heating device, and relates to the field of air heating devices. The air heating equipment comprises a heating block, a heating module and a control module, wherein the heating block is used for heating flowing air; the temperature measuring circuit is used for detecting the air outlet temperature of an air outlet of the air heating equipment; and the temperature control switch is connected in series between the temperature measuring circuit and the heating block. According to the air heating equipment, when the temperature measuring circuit senses that the temperature of the air supply outlet is abnormal, the alarm signal carrying the real-time air outlet temperature is sent out to trigger the temperature control switch to take off to cut off the power supply of the heating block, and therefore the fire risk of the air heating equipment is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air heating equipment, and more particularly, to an air heating equipment capable of preventing fire. BACKGROUND

[0002] Air heating equipment is recognized and welcomed by consumers due to its low price and reliable quality. The air heating equipment uses a heating block to heat air, and then a blowing motor sends the hot air flow. However, if the blowing motor stops working due to rust, the hot flow conduction may not be timely, which may cause a fire risk.

[0003] Therefore, how to avoid the air heating equipment from catching fire due to the hot flow conduction not being timely caused by the rust of the blowing motor becomes a technical problem to be solved in the field. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the embodiments of the present application aim to provide an air heating equipment capable of preventing fire, so as to solve the problem that the air heating equipment catches fire due to the hot flow conduction not being timely caused by the rust of the blowing motor.

[0005] In a first aspect, the present specification provides an air heating equipment capable of preventing fire, and the air heating equipment comprises:

[0006] a heating block configured to heat air flowing therethrough;

[0007] a temperature measuring circuit configured to detect an air outlet temperature of an air outlet of the air heating equipment;

[0008] a temperature control switch connected in series between the temperature measuring circuit and the heating block.

[0009] According to the first aspect, in a possible implementation, the air heating equipment further comprises a PTC heating element, and the temperature measuring circuit is connected in series with the PTC heating element.

[0010] According to the first aspect, in a possible implementation, the air heating equipment further comprises a blowing motor, a motor controller, and a blowing motor switch connected in series between the blowing motor and the motor controller, and the blowing motor, the motor controller, and the blowing motor switch are all connected in parallel with the heating block.

[0011] The motor controller comprises a timer and a time relay connected with the timer, and the timer is electrically connected with the temperature measuring circuit.

[0012] According to the first aspect, in a possible implementation, the temperature measuring circuit and the blowing motor switch are both connected with a live wire L, and the heating block, the PTC heating element, and the blowing motor are all connected with a neutral wire N.

[0013] According to the first aspect, in a possible implementation, the temperature measuring circuit comprises:

[0014] a power module for converting an alternating current power into a direct current power;

[0015] a temperature measuring module for detecting an air outlet temperature;

[0016] an alarm module for sending an alarm signal to the temperature control switch and the motor controller;

[0017] a display module for displaying the air outlet temperature after the alarm signal is sent.

[0018] According to the first aspect, in a possible implementation, the alarm module comprises a buzzer and an alarm indicator.

[0019] According to the first aspect, in a possible implementation, the temperature control switch is further configured to detect a current of the heating block to cut off the power supply of the heating block when the heating block is overloaded.

[0020] According to the first aspect, in a possible implementation, the temperature measuring circuit is externally provided with an insulating material, which is asbestos, glass, ceramic or epoxy resin.

[0021] According to the first aspect, in a possible implementation, the heating block is a PTC ceramic or a heating wire.

[0022] According to the first aspect, in a possible implementation, the heating block is more than two, each of which is connected in parallel with the other heating blocks, and each of which is connected in parallel with the air supply motor.

[0023] Compared with the prior art, the application has the following advantages:

[0024] Compared with the prior art, the application provides a fireproof air warming device, which comprises a heating block for heating air flowing therethrough, a temperature measuring circuit for detecting an air outlet temperature of an air outlet of the air warming device, and a temperature control switch connected in series between the temperature measuring circuit and the heating block. The air warming device connects the temperature measuring circuit and the temperature control switch in series on the heating block of the air warming device. When the temperature measuring circuit senses an abnormal air outlet temperature, an alarm signal is sent to trigger the temperature control switch to cut off the power supply of the heating block, thereby avoiding the risk of fire of the air warming device. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0026] Figure 1Fig. 1 is a schematic diagram of a heating block connection of the wind heating device of the present application;

[0027] Figure 2 Fig. 2 is another schematic diagram of a heating block connection of the wind heating device of the present application;

[0028] Figure 3 Fig. 3 is a schematic diagram of a connection between the air supply motor and the heating block of the present application;

[0029] Figure 4 Fig. 4 is a schematic diagram of the temperature measurement circuit structure of the present application.

[0030] Reference signs:

[0031] 1, temperature measurement circuit; 2, temperature control switch; 3, heating block; 4, PTC heating element; 5, closed contact; 6, open contact; 7, air supply motor switch; 8, motor controller; 9, air supply motor; 81, timer; 82, time relay; 11, power module; 12, temperature measurement module; 13, alarm module; 14, display module. DETAILED DESCRIPTION

[0032] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present application shall have the ordinary meaning understood by a person of ordinary skill in the art to which the embodiments of the present application belong. The terms “first”, “second”, and the like used in the embodiments of the present application do not represent any order, number, or importance, but are only set to avoid confusion of the constituent elements.

[0033] Unless otherwise required by the context, throughout the specification, “plurality” means “at least two”, “comprising” is interpreted to be open, inclusive meaning, i.e. “including, but not limited to”. In the description of the specification, the terms “one embodiment”, “some embodiments”, “exemplary embodiments”, “example”, “specific example”, or “some examples” are intended to mean that the specific feature, structure, material, or characteristic related to the embodiment or example is included in at least one embodiment or example of the specification. The illustrative representation of the above terms does not necessarily mean the same embodiment or example.

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely in the following 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, not all. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0035] As Figure 1As shown in the heating block connection diagram of the wind heating device provided by the embodiment of the application, the wind heating device comprises a heating block 3, a temperature measuring circuit 1, a temperature control switch 2 and a PTC heating element 4.

[0036] The heating block 3 is used for heating the air flowing through.

[0037] The temperature measuring circuit 1 is used for detecting the outlet air temperature of the wind heating device.

[0038] The temperature control switch 2 is connected in series between the temperature measuring circuit 1 and the heating block 3.

[0039] The function of the temperature measuring circuit can be realized by a conventional temperature measuring circuit, and the specific implementation mode is not limited here. The temperature control switch is an electrical device mainly used for monitoring and controlling the device whose temperature is within a certain range; it can automatically cut off the power supply when the temperature exceeds the preset temperature value during the operation of the device, so as to avoid damage caused by overheating of the device. The temperature control switch can detect the temperature by itself or receive the temperature transmitted by other components and perform corresponding actions.

[0040] When the motor of the wind heating device is abnormal or even stops working due to rust, the real-time temperature is detected by the temperature measuring circuit, and when the preset outlet air temperature is exceeded, an alarm signal carrying the real-time outlet air temperature is sent to the temperature control switch, triggering the temperature control switch to make a jump action, thereby cutting off the power supply of the heating block, and avoiding the occurrence of the risk of fire.

[0041] In order to avoid the risk of the wind heating device repeatedly turning on and off, and to avoid the risk before the device returns to normal, the wind heating device further comprises a PTC heating element 4, as shown in the heating block connection diagram of the wind heating device provided by the embodiment of the application. Figure 2

[0042] When the risk occurs and the temperature control switch 2 cuts off the power supply of the heating block 3, the temperature control switch 2 is bounced from the closed contact 5, thereby contacting the open contact 6, so that the temperature measuring circuit 1 is connected in series with the PTC heating element 4. When the wind heating device works normally, the PTC heating element 4 is open, and when the power supply of the heating block 3 is cut off, the PTC heating element 4 is connected in series with the temperature measuring circuit 1 to form a closed circuit. After the PTC heating element 4 forms a closed circuit, it can emit heat, and the heat is sufficient to keep the temperature control switch 2 in the same state until the power supply of the PTC heating element 4 is cut off after the fault is removed, so that the temperature control switch 2 is reset to the initial state, thereby further ensuring the safety of the wind heating device.

[0043] In order to avoid greater risks or other hidden dangers of the motor itself when the air supply motor is abnormal, the application also designs the air supply motor 9, as shown in the heating block connection diagram of the wind heating device provided by the embodiment of the application. Figure 3 ​The diagram shown is a schematic of the connection between the blower motor and the heating block provided in an embodiment of this application. The air-heating device also includes: a blower motor 9, a motor controller 8, and a blower motor switch 7. The blower motor switch 7 is connected in series between the blower motor 9 and the motor controller 8. The blower motor 9, the motor controller 8, and the blower motor switch 7 are all connected in parallel with the heating block 3. The motor controller includes: a timer 81 and a time relay 82 connected to the timer 81. The timer 81 is electrically connected to the temperature measuring circuit 1.

[0044] When an abnormal temperature at the air outlet causes the temperature sensing circuit to issue an alarm signal, the timer of the motor controller, which is electrically connected to the temperature sensing circuit, also receives the alarm signal and begins timing. After exceeding a preset time threshold, it sends a timeout signal to the time relay, which then sends a motor control signal to the blower motor switch to disconnect the power supply. The motor control signal can be an instruction to open the switch. The time relay is an electrical control device whose core function is to control the circuit to be connected or disconnected (set to disconnect in this application) according to a predetermined time interval. The blower motor switch can be an electronic switch, which can be reset to its default closed state after the fault is cleared. This embodiment can prevent increased damage to the blower motor and the occurrence of risks such as fire.

[0045] To enhance the active protection of the blower motor, a motor detection module can be added to the motor controller to detect the motor's noise, current, vibration, and temperature. This detection module can consist of components such as noise sensors, ammeters, vibration sensors, and temperature sensors. It is well known that when a blower motor experiences abnormal speed or even stops working due to rust, it is usually accompanied by various states, such as abnormal noise, abnormal power consumption, abnormal vibration, and abnormal temperature. These states differ significantly between normal operation and abnormal operation, and these differences can be used to set state thresholds for the blower motor. By detecting one or more abnormal states (i.e., exceeding the state threshold) by the motor detection module, a motor fault is determined, and a motor control signal is sent to the blower motor switch to disconnect the power supply. This implementation method enables proactive protection when the motor malfunctions due to rust, preventing further damage to the equipment and other potential hazards.

[0046] As a preferred option, such as Figure 3 As shown, the temperature measuring circuit and the blower motor switch are both connected to the live wire L, while the heating block, PTC heating element, and blower motor are all connected to the neutral wire N. This connection configuration further enhances the safety of the air-cooled heating equipment.

[0047] like Figure 4 The diagram shown is a schematic representation of the structure of the temperature measuring circuit 2 provided in an embodiment of this application. The temperature measuring circuit 2 includes:

[0048] A power module 21 is configured to convert an alternating current power into a direct current power;

[0049] A temperature measuring module 22 is configured to detect an air outlet temperature;

[0050] An alarm module 23 is configured to send an alarm signal to the temperature control switch and the motor controller;

[0051] A display module 24 is configured to display the air outlet temperature after the alarm signal is sent.

[0052] The temperature measuring module 22 can send the detected real-time air outlet temperature to the alarm module 23 and the display module 24. The alarm module 23 compares the received real-time air outlet temperature with a preset air outlet temperature and sends an alarm signal when the real-time air outlet temperature exceeds the preset air outlet temperature. The display module 24 can display the real-time air outlet temperature after receiving the alarm signal from the alarm module 23, or can always display the real-time air outlet temperature.

[0053] In order to facilitate the acquisition of the wind warming device, the alarm module 23 can be further designed, for example, a buzzer and an alarm indicator light are added, so as to alarm and prompt in the form of sound and light.

[0054] As a preferred solution, the temperature control switch is also configured to detect the current of the heating block to cut off the power supply of the heating block when the heating block is overloaded. The heating block of the wind warming device may also be overloaded due to other reasons during operation, thereby causing hidden dangers such as fire. By detecting the current of the heating block through the temperature control switch, the occurrence of potential risks can be effectively avoided.

[0055] As a preferred solution, an insulating material is arranged outside the temperature measuring circuit, and the insulating material is asbestos, glass, ceramic or epoxy resin. By arranging an insulating material outside the temperature measuring circuit, the hidden danger of fire can be effectively prevented. In addition, other insulating materials can also be used, which will not be described here.

[0056] As a preferred solution, the heating block is a PTC ceramic or a heating wire, which can be selected according to actual needs.

[0057] As a preferred solution, as shown in Figure 3 The heating block is two or more, each heating block is connected in parallel with other heating blocks, and each heating block is connected in parallel with the air supply motor. Multiple heating blocks can provide multiple choices of heating efficiency. Multiple heating blocks can be the same or different, thereby improving the adaptability of the product.

[0058] The fire prevention wind heating device provided by the application, by connecting the temperature control switch between the temperature measurement circuit and the heating block, when the motor is abnormal in rotation speed or even stops working due to rust, and the heat of the air outlet accumulates, the real-time temperature is detected by the temperature measurement circuit, when the preset air outlet temperature is exceeded, the temperature control switch is sent an alarm signal carrying the real-time air outlet temperature, so as to trigger the temperature control switch to start the jump action, and the power supply of the heating block is cut off, so that the fire risk of the wind heating device is avoided.

[0059] In addition, by adding a PTC heating element in the circuit, after the power supply of the heating block is cut off by the temperature control switch, the PTC heating element is connected in series to form a closed circuit, so that the heat emitted by the PTC heating element keeps the state of the temperature control switch, and only after the fault is removed and the power supply of the PTC heating element is cut off, the temperature control switch can be reset to the initial state, so as to further ensure the safety of the wind heating device.

[0060] The above description of the disclosed embodiments, the features described in each embodiment in the specification can be replaced or combined with each other, so that those skilled in the art can realize or use the application. The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art, without departing from the scope of the present application, can make many possible changes and modifications to the technical solution of the present application, or modify it into equivalent embodiments. Therefore, any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments, all still belong to the protection scope of the present application.

Claims

1. A wind-warming device that prevents misfires, characterized by, The air warming device comprises: a heating block for heating air flowing therethrough; a temperature measuring circuit for detecting the temperature of air flowing out of an air outlet of the air warming device; a temperature control switch connected in series between the temperature measuring circuit and the heating block; the air warming device further comprises a PTC heating element, and the temperature measuring circuit is connected in series with the PTC heating element; the PTC heating element is used to maintain the state of the temperature control switch by heat generated by the PTC heating element after the temperature control switch cuts off the power supply of the heating block.

2. The fan warming apparatus of claim 1, wherein, The air warming device further comprises a blower motor, a motor controller and a blower motor switch connected in series between the blower motor and the motor controller, and the blower motor, the motor controller and the blower motor switch are all connected in parallel with the heating block. The motor controller comprises a timer and a time relay connected with the timer, and the timer is electrically connected with the temperature measuring circuit.

3. The fan heater of claim 2, wherein The temperature measuring circuit and the blower motor switch are both connected with a live wire L, and the heating block, the PTC heating element and the blower motor are all connected with a neutral wire N.

4. The fan warming apparatus of claim 3, wherein, The temperature measuring circuit comprises: a power supply module for converting an alternating current power supply into a direct current power supply; a temperature measuring module for detecting the temperature of air flowing out of the air outlet; an alarm module for sending an alarm signal to the temperature control switch and the motor controller; a display module for displaying the temperature of air flowing out of the air outlet after the alarm signal is sent.

5. The fan warming apparatus of claim 4, wherein, The alarm module comprises a buzzer and an alarm indicator.

6. The fan heating apparatus of any one of claims 1-2, wherein, The temperature control switch is further used to detect the current of the heating block to cut off the power supply of the heating block when the heating block is overloaded.

7. The fan heating apparatus of any one of claims 1-2, wherein, The temperature measuring circuit is externally provided with an insulating material, which is asbestos, glass, ceramic or epoxy resin.

8. The fan heating apparatus of any one of claims 1-2, wherein, The heating block is a PTC ceramic or a heating wire.

9. The fan warming apparatus of claim 3, wherein, The heating block is two or more, each of the heating blocks is connected in parallel with other heating blocks, and each of the heating blocks is connected in parallel with the blower motor.

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