Gas dryer and control system thereof

Abstract

The utility model relates to a gas dryer which comprises a clothes drying barrel, a roller driving motor for driving the clothes drying barrel to rotate through belt transmission, a burner for conveying hot air to the clothes drying barrel, and a gas valve for controlling the load of the burner, the air inlet duct is arranged at the front end of the clothes drying barrel and serves as an air inlet, the air outlet duct is arranged at the rear end of the clothes drying barrel and serves as an air outlet, the exhaust fan is arranged at the rear end of the air outlet duct and conducts negative pressure air draft into the clothes drying barrel, a humidity monitor is arranged in the clothes drying barrel, and the air outlet duct is provided with a smoke temperature limiter for monitoring the air temperature. By means of humidity and temperature dual monitoring and intelligent regulation and control, the safety of the clothes drying quality is improved, meanwhile, the higher energy efficiency ratio is achieved, and the scheme further comprises a control system of the clothes drying machine.

Description

Technical Field

[0001] This application relates to the field of gas appliance technology, specifically to the field of a gas dryer and its control system. Background Technology

[0002] Currently, gas dryers on the market mainly rely on burning natural gas or other gaseous fuels to generate high-temperature flue gas, which is then guided into the drying drum by a built-in fan to evaporate the moisture in the clothes.

[0003] Traditional gas dryers are mainly controlled by a temperature controller installed inside the drying drum. When the temperature inside the drum reaches the set value, the controller will close the gas valve and stop combustion; when the temperature drops to the starting value, the gas valve will open again to continue combustion.

[0004] At this point, although the internal temperature control can ensure that the internal temperature is maintained within a suitable range, avoiding safety hazards caused by overheating, it cannot reflect changes in combustion status and exhaust conditions in real time. This may lead to problems such as incomplete combustion or carbon buildup, affecting equipment lifespan and increasing safety risks.

[0005] At the same time, different types of clothing have different temperature adaptability, and the existing temperature control mechanism is difficult to meet diverse needs. Summary of the Invention

[0006] In response to the aforementioned needs, this application proposes a gas-fired dryer and its control system, which aims to improve the overall performance of the gas-fired dryer, such as safety and clothes drying quality, by introducing multiple sensing and control systems.

[0007] To achieve the above objectives, the present application adopts the following technical solution:

[0008] In a first aspect, this application proposes a gas-fired dryer, including a drying drum, a drum drive motor that drives the drying drum to rotate via belt transmission, a burner that supplies hot air to the drying drum, and a gas valve that controls the load of the burner.

[0009] It also includes an air inlet duct set at the front of the drying drum as an air inlet, an air outlet duct set at the rear of the drying drum as an air outlet, and an exhaust fan set at the rear of the air outlet duct to draw negative pressure air into the drying drum.

[0010] The drying drum is equipped with a humidity monitor, and the air outlet is equipped with a smoke temperature limiter to monitor the air temperature.

[0011] In this way, the quality and safety of clothes drying are improved through dual monitoring and intelligent control of humidity and temperature, while also achieving a higher energy efficiency ratio.

[0012] Specifically, the humidity monitor inside the drying drum can monitor the dryness of the clothes in real time and automatically adjust the drying process based on the humidity data, avoiding damage to the clothes caused by over-drying and improving the quality of clothing care. Secondly, combined with the smoke temperature limiter in the air outlet duct, it monitors whether the air drawn out after the wet clothes have dried is within the preset temperature range, ensuring the safe operation of the entire machine.

[0013] In some possible implementations, a rotation sensor is also included to monitor whether the dryer tub is rotating and its rotation speed, and a sensing magnet is provided on the outer periphery of the dryer tub.

[0014] In some possible implementations, the inner circumference of the drying drum is provided with multiple anti-stick baffles.

[0015] In some possible implementations, the air inlet and outlet ducts are annular structures.

[0016] In some possible implementations, the air inlet and outlet are axially symmetrically arranged at both ends of the drying drum.

[0017] In some possible implementations, a first smoke temperature probe is also included, which is disposed in the air inlet duct.

[0018] In some possible implementations, the exhaust fan has a dehumidification channel at its rear end, and the dehumidification channel is equipped with a second smoke temperature probe.

[0019] In some possible implementations, an oxygen deficiency protector is provided between the burner and the air intake duct.

[0020] Secondly, a gas dryer control system is proposed, including a main controller that receives feedback signals from at least one of the above-mentioned first flue gas temperature probe, second flue gas temperature probe, flue gas temperature limiter, humidity monitor, rotation sensor, and oxygen deficiency protector, and controls the exhaust fan, drum drive motor, and gas valve according to the feedback signals. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of the gas-fired dryer of this application;

[0022] Figure 2 This is a schematic diagram of the gas-fired dryer control system of this application. Detailed Implementation

[0023] The following examples further illustrate the features of this application and other related features in detail, so as to facilitate understanding by those skilled in the art:

[0024] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached diagrams, while the terms “bottom surface,” “top surface,” “inner,” and “outer” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0025] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this case based on the specific circumstances.

[0026] Please refer to Figure 1 The drying drum of the gas-fired dryer described in this application serves as the drying chamber for clothes. Wet clothes are dried with hot air inside the drum, requiring the drum to rotate while simultaneously supplying hot air to its interior. Traditionally, the temperature inside the drum is monitored; if the temperature is too low, the airflow is increased; if it is too high, operation stops. However, in actual operation, the temperature varies depending on the degree of moisture in the clothes, resulting in different temperatures for the same amount of hot air. Therefore, continuous hot air when clothes are wet can cause over-combustion, posing a safety hazard to the entire dryer. Conversely, continuous high-temperature hot air when clothes are relatively dry can also affect the drying quality.

[0027] In this application, the gas-fired dryer includes a drying drum 100 with a door 200 at its front end. A drum drive motor 300 drives the dryer to rotate via a belt 310. A rotation sensor 1 is located on the outside of the drying drum 100 to monitor whether the drying drum 100 is rotating and its rotation speed. Correspondingly, an induction magnet 110 is provided on the outer periphery of the drying drum 100, which rotates synchronously with the drying drum 100. The change in its magnetic field is captured by the rotation sensor 1, thereby monitoring the motion state of the drying drum 100. When an abnormality is detected, the machine stops operating to protect the entire system. Furthermore, multiple anti-stick baffles 120 are provided on the inner periphery of the drying drum 100 to prevent clothes from tangling or sticking to the drum wall due to rotation and airflow.

[0028] Hot air delivery is achieved by burning gas in the burner 400 to provide high-temperature hot air into the dryer drum 100 to dry damp clothes, while the gas valve 410 controls the opening and closing of the valve and adjusts the amount of gas entering the burner 400, thereby controlling the flame size and heat output.

[0029] An air inlet duct 510, serving as a hot air inlet, is provided at the front end of the drying drum 100, between the drying drum 100 and the door 200. An air outlet duct 520, serving as a dried air outlet, is provided at the rear end of the drying drum 100. An exhaust fan 600, which draws negative pressure air into the drying drum 100, is provided at the rear end of the air outlet duct 520. A DC fan is preferred for better wind resistance and to prevent backflow.

[0030] In some embodiments, an oxygen deficiency protector 420 is provided between the burner 400 and the air inlet duct 510. The oxygen deficiency protector 420 can detect insufficient oxygen caused by backflow or flue blockage. Once a risk of flame overflow is detected, it will automatically shut off the gas valve to ensure the safe operation of the entire system.

[0031] In a preferred embodiment, the air inlet duct 510 and the air outlet duct 520 are annular structures and are symmetrically arranged at both ends of the drying drum 100, making the hot air flow smoother. First, under the negative pressure of the exhaust fan 600, the air inlet duct 510 collects high-temperature hot air. In some embodiments, a first smoke temperature probe 2 is installed in the air inlet duct 510 to monitor the hot air temperature. When the temperature is higher than the set value, the gas valve 410 is closed to protect the entire system.

[0032] Meanwhile, a humidity monitor 3 is installed inside the drying drum 100, and a smoke temperature limiter 4 is installed in the air outlet duct 520 to monitor the temperature of the air drawn from the drying drum 100. The humidity monitor 3 monitors the humidity of the clothes inside the drum, and the smoke temperature limiter 4 monitors whether the air after the damp clothes have been dried is within a preset temperature range.

[0033] In this way, the quality and safety of clothes drying are improved through dual monitoring and intelligent control of humidity and temperature, while also achieving a higher energy efficiency ratio.

[0034] Specifically, the humidity monitor 3 inside the drying drum 100 can monitor the dryness of the clothes in real time and automatically adjust the drying process based on the humidity data, avoiding damage to the clothes caused by over-drying and improving the quality of clothing care. Secondly, combined with the smoke temperature limiter 4 in the air outlet duct 520, it monitors the temperature of the exhaust air and whether the air drawn out after the wet clothes are dried is within the preset temperature range, ensuring the safe operation of the whole machine.

[0035] Furthermore, the exhaust fan 600 is provided with a dehumidification channel 530 at its rear end, and the dehumidification channel 530 is equipped with a second smoke temperature probe 5. Based on factors such as the humidity inside the drying drum 100, the selected machine mode, the type of clothing, and the air temperature fed back by the second smoke temperature probe 530, the speed of the exhaust fan 600 is adjusted in real time to achieve the purpose of stable drying of clothes.

[0036] The control of the entire system described above is accomplished by the control system. Specifically, this includes the main controller 700; please refer to the relevant documentation. Figure 2 The main controller 700 is responsible for outputting signals, controlling the operation of various electrical components, receiving feedback, and ensuring the safe operation of the entire machine.

[0037] Specifically, the receivable feedback signals include: air temperature signal S1, including signals from the first smoke temperature probe 2, the second smoke temperature probe 5, and the smoke temperature limiter 4; signals from the dryer drum 100, including rotation signals from the rotation sensing device 1 and humidity signals from the humidity sensor 3; signal feedback and control output from the combustion system S3, including signals from the oxygen deficiency protector 420 and control signals to the gas valve 410; and control signals S4, including control signals to the exhaust fan 600 and the drum drive motor 300.

[0038] As stated above, this case protects a gas-fired dryer and its control system, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A gas-fired dryer, characterized in that, Includes a clothes dryer (100), a roller drive motor (300) that drives the clothes dryer (100) to rotate via a belt (310), a burner (400) that supplies hot air to the clothes dryer (100), and a gas valve (410) that controls the load of the burner (400). It also includes an air inlet duct (510) set at the front end of the drying tub (100) as an air inlet, an air outlet duct (520) set at the rear end of the drying tub (100) as an air outlet, and an exhaust fan (600) set at the rear end of the air outlet duct (520) to draw air into the drying tub (100) under negative pressure. The drying drum (100) is equipped with a humidity monitor (3), and the air outlet (520) is equipped with a smoke temperature limiter (4) for monitoring air temperature.

2. The gas-fired dryer as described in claim 1, characterized in that, It also includes a rotation sensing device (1) for monitoring whether the drying tub (100) rotates and its rotation speed, wherein the outer periphery of the drying tub (100) is provided with a sensing magnet (110).

3. A gas-fired dryer as described in claim 1, characterized in that, The inner circumference of the drying tub (100) is provided with multiple anti-stick baffles (120).

4. A gas-fired dryer as described in claim 1, characterized in that, The air inlet duct (510) and air outlet duct (520) are ring-shaped structures.

5. A gas-fired dryer as described in claim 4, characterized in that, The air inlet duct (510) and air outlet duct (520) are axially symmetrically arranged at both ends of the drying tub (100).

6. A gas-fired dryer as described in claim 1, characterized in that, It also includes a first smoke temperature probe (2) installed in the air inlet duct (510).

7. A gas-fired dryer as described in claim 1, characterized in that, The exhaust fan (600) is provided with a dehumidification channel (530) at its rear end, and the dehumidification channel (530) is provided with a second smoke temperature probe (5).

8. A control system for a gas-fired dryer, characterized in that, The system includes a main controller (700) that receives feedback signals from at least one of the following as described in any one of claims 1 to 7: a first smoke temperature probe (2), a second smoke temperature probe (5), a smoke temperature limiter (4), a humidity monitor (3), a rotation sensing device (1), and an oxygen deficiency protector (420), and controls the exhaust fan (600), the drum drive motor (300), and the gas valve (410) based on the feedback signals.

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