Full-automatic hydrothermal circulation constant-temperature drying equipment

Abstract

The utility model relates to the field of hydrothermal drying equipment, in particular to full-automatic hydrothermal circulation constant-temperature drying equipment which comprises a drying room, a control system and a heating system, the control system is used for a user to set data and control the heating system, and the heating system is used for controlling the temperature and the humidity in the drying room. The temperature and the humidity in the drying room can be accurately and uniformly controlled, so that the drying temperature error of + / -2 DEG C and the humidity error of + / -5 DEG C are reduced. And the influence of unstable temperature on the quality and color of a dried object is avoided. Water vapor is adopted for heat transfer, the efficiency is high, and the highest drying temperature is guaranteed. The heat can be quickly and uniformly transferred to the articles in cooperation with an automatic fan, so that the drying efficiency is improved, and the quality of the dried articles is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrothermal drying equipment, specifically to a fully automatic hydrothermal circulating constant temperature drying equipment. Background Technology

[0002] Existing technologies for drying temperature-sensitive items such as precious Chinese medicinal herbs and edible fungi include traditional sun-drying, high-temperature drying, and microwave or far-infrared heating drying. However, these methods struggle to precisely control the temperature during the drying process, potentially leading to excessively high or low temperatures that negatively impact the quality of the herbs and fungi. Increasing drying efficiency often necessitates higher temperatures, but high temperatures can damage the active ingredients in these herbs and fungi, reducing their quality. Alternatively, they may result in higher energy consumption and environmental problems.

[0003] To address the above issues, technological development directions may include developing more precise temperature control systems, optimizing drying processes to improve efficiency while ensuring quality, and developing more environmentally friendly, low-energy-consumption drying equipment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a fully automatic water-heat circulating constant temperature drying equipment.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] This utility model discloses a fully automatic water-heat circulating constant temperature drying equipment, including a drying room, a control system and a heating system. The control system is used for user data setting and controlling the heating system, and the heating system is used to control the temperature and humidity in the drying room.

[0007] The control system includes a controller, an exhaust fan relay, a main fan relay, an ignition relay, a water inlet solenoid valve, a drain solenoid valve, a reflux pump control valve, a natural gas pressure collector, a boiler water temperature and pressure collector, and a drying room temperature and humidity collector. The output of the controller is connected to the input of the exhaust fan relay, the reflux pump control valve, the water inlet solenoid valve, the drain solenoid valve, the main fan relay, and the ignition relay, respectively. The input of the controller is connected to the output of the natural gas pressure collector, the boiler water temperature and pressure collector, and the drying room temperature and humidity collector, respectively.

[0008] The drying room is equipped with an exhaust fan, an intake fan, a finned heat exchanger, and a temperature and humidity sensor;

[0009] The heating system includes a heater and a pressure water tank. The heater heats the pressure water tank. The heater is equipped with an ignition ring and a natural gas inlet pipe. The natural gas inlet pipe is connected in sequence to a natural gas pressure sensor and a natural gas proportional valve, and then to an external natural gas supply. The pressure water tank is also equipped with a tap water inlet pipe, which is connected to an inlet valve and then to an external tap water supply. The pressure water tank is also equipped with a pressure relief valve, which is connected to a pressure gauge. The pressure water tank is connected in sequence to a reflux pump, a drain solenoid valve, and a water pressure and temperature sensor, and then to a fin heat exchanger. The natural gas pressure sensor and the natural gas proportional valve are connected to the controller. The inlet solenoid valve is connected to the inlet valve, the drain solenoid valve is connected to the drain valve, and the reflux pump control valve is connected to the reflux pump.

[0010] Furthermore, the control system includes a physical keyboard, an audio-visual prompt module, and a door magnetic latch; the output terminal of the controller is connected to the input terminal of the audio-visual prompt module; the input terminal of the controller is connected to the output terminal of the physical keyboard; the controller is also connected to a touch screen and a transformer.

[0011] Furthermore, the drying room is equipped with a left drying room door magnet, a right drying room door magnet, an air outlet, and an air inlet.

[0012] Furthermore, the ignition relay is connected to the ignition coil, the main fan relay is connected to the intake fan, and the exhaust fan relay is connected to the exhaust fan.

[0013] The beneficial effects of this utility model are:

[0014] 1) It can accurately and evenly control the temperature and humidity inside the drying room, avoiding the impact of fluctuating temperatures on the quality and color of the dried items. Combined with an automatic fan, it can quickly and evenly transfer heat to the items, improving drying efficiency and the quality of the dried items.

[0015] 2) Even if the control system malfunctions or the operator's operation method is incorrect, the quality of the dried items can still be guaranteed to be stable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the control system of a fully automatic hydrothermal circulating constant temperature drying equipment according to an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the heating system of a fully automatic hydrothermal circulating constant temperature drying equipment according to an embodiment of the present utility model;

[0018] Figure 3Figure (a) is a front view and Figure (b) is a back view of a fully automatic hydrothermal circulating constant temperature drying equipment according to an embodiment of the present utility model.

[0019] Figure 4 This is a side view of the drying chamber of a fully automatic hydrothermal circulating constant temperature drying device according to an embodiment of the present utility model;

[0020] Figure 5 This is a top view of the drying chamber of a fully automatic water-heat circulating constant temperature drying device according to an embodiment of the present utility model;

[0021] In the diagram, 1-heater, 2-pressure water tank, 3-ignition ring, 4-natural gas inlet pipe, 5-natural gas pressure sensor, 6-natural gas proportional valve, 7-tap water inlet pipe, 8-inlet valve, 9-pressure relief valve, 10-pressure gauge, 11-recirculation pump, 12-drain valve, 13-water pressure and temperature sensor, 14-fin heat exchanger, 15-left drying chamber door magnet, 16-right drying chamber door magnet, 17-exhaust fan, 18-inlet fan, 19-air outlet, 20-air inlet, 21-temperature and humidity sensor. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] This utility model discloses a fully automatic water-heat circulating constant temperature drying device, including a drying chamber, a control system, and a heating system. The control system is used for user-set data and to control the heating system, while the heating system controls the temperature and humidity within the drying chamber. This utility model can accurately and uniformly control the temperature and humidity within the drying chamber, achieving a temperature error of ±2 degrees Celsius and a humidity error of ±5 degrees Celsius. This avoids the impact of fluctuating temperatures on the quality and color of the dried items. Utilizing steam heat transfer is highly efficient and ensures the highest drying temperature. Combined with an automatic fan, heat can be quickly and evenly transferred to the items, improving drying efficiency and the quality of the dried items. Even if the control system malfunctions or the operator's method is incorrect, the quality of the dried items can still be guaranteed to remain stable.

[0024] Specifically, the structural diagram of the control system is as follows: Figure 1As shown, the control system includes a controller, a physical keyboard, an audible and visual prompt module, an inlet solenoid valve, a drain solenoid valve, a return pump solenoid valve, a natural gas proportional valve, an exhaust fan relay, a main fan relay, a door magnetic latch, an ignition relay, a natural gas pressure sensor, a boiler water temperature and pressure sensor, and a drying room temperature and humidity sensor. The controller's output is connected to the inputs of the audible and visual prompt module, the inlet solenoid valve, the drain solenoid valve, the return pump solenoid valve, the natural gas proportional valve, the exhaust fan relay, the main fan relay, the door magnetic latch, and the ignition relay. The controller's inputs are connected to the outputs of the physical keyboard, the natural gas pressure sensor, the boiler water temperature and pressure sensor, and the drying room temperature and humidity sensor. The controller is also connected to a touch screen and a transformer. The control system is used to control the heating system for automatic heating and to control the operation of the inlet and exhaust fans, ensuring uniform and stable temperature and humidity within the drying room. The touch screen displays the operating status, operating parameters, and parameter settings. The physical buttons are used for emergency stop, manual or automatic switching, and start / stop. The audio-visual prompt module uses lights to indicate the working status and sounds to indicate machine malfunctions and completion of work. The transformer converts 380V AC power to 24V DC power. The drying room temperature and humidity sensor uses six sets of high-precision digital probes to collect temperature and humidity data at different locations, ensuring uniform temperature and humidity throughout the drying room. The boiler water temperature and pressure sensor uses a high-precision digital temperature probe to collect water temperature data and simultaneously controls water inlet and outlet. A dual-channel digital piezoelectric sensor collects the boiler's working water pressure; one sensor ensures the boiler pressure does not exceed the safe pressure, while the other detects the water level. The natural gas pressure sensor uses a thin-film digital pressure sensor to detect the natural gas supply, requiring its use for both successful and failed ignition. The ignition relay is connected to the ignition coil 3 and controls its operation. The door magnetic latch controls the opening and closing of the drying room door. There are a total of four main fan relays, with each relay controlling one of the four intake fans. There are two sets of exhaust fan relays in total, with each set controlling two exhaust fans. The main fan relay is connected to the intake fan 18, and the exhaust fan relay is connected to the exhaust fan 17. The natural gas proportional valve 6 is used to adjust the heat output. The reflux pump solenoid valve controls the reflux pump to ensure hot water circulation. The inlet and outlet solenoid valves control the inlet and outlet valves respectively, completing the water intake and drainage operations.

[0025] Specifically, the front and back diagrams of the drying room are as follows: Figure 3 As shown, Figure (a) is a front view and Figure (b) is a rear view; the drying room is equipped with a left drying room door magnet 15, a right drying room door magnet 16, four exhaust fans 17 and sixteen intake fans 18; the side view of the drying room is shown below. Figure 4 As shown; the drying room is also equipped with a finned heat exchanger 14, four air outlets 19, and sixteen air inlets 20; a top view of the drying room is shown below. Figure 5 As shown, the drying room is also equipped with 6 temperature and humidity sensors 21.

[0026] Specifically, the structural diagram of the heating system is as follows: Figure 2 As shown, the heating system includes a heater 1 and a pressure water tank 2. The heater 1 heats the pressure water tank 2. The heater 1 is equipped with an ignition ring 3 and a natural gas inlet pipe 4. The natural gas inlet pipe 4 is connected to a natural gas pressure sensor 5 and a natural gas proportional valve 6 in sequence, and then connected to an external natural gas supply. The pressure water tank 2 is also equipped with a tap water inlet pipe 7, which is connected to an inlet valve 8 and then connected to an external tap water supply. The pressure water tank 2 is also equipped with a pressure relief valve 9, which is also connected to a pressure gauge 10. The pressure water tank 2 is connected to a return pump 11, a drain valve 12, a water pressure and temperature sensor 13 in sequence, and then connected to a fin heat exchanger 14.

[0027] Specifically, the working principle of this utility model is as follows: Upon power-on self-test, it checks whether the sensors and relays are online and whether communication signals are being transmitted. It ensures that all parts are functioning normally; if any are not, the display screen will show a code E00-E90 indicating a damaged or offline control component. It acquires user-set data; the baking temperature curve consists of two parts: manual input or preset. The baking curve parameters need to be manually determined before each equipment start-up. It acquires real-time sensor data, compares it with user parameters, and adjusts the initial working state of the drying chamber. It adds tap water, acquires water level information, opens the inlet solenoid valve, and adds tap water to the preset value.

[0028] Ignition, door magnetic power supply, locking of the drying chamber door, and start of the reflux pump. Adjust the natural gas proportional valve to open it by 5%, simultaneously igniting the ignition coil. Both sets of ignition coils work simultaneously to ensure normal ignition. If ignition fails, the ignition coil sends back data, and power to the ignition coil stops after 10 seconds. The natural gas pressure sensor sends back data to monitor gas pressure in real time. If the natural gas pressure is abnormal, the data sent back controls the natural gas proportional valve to close. Adjusting the natural gas proportional valve regulates the firepower and water temperature. During baking, the temperature varies at different times, ranging from 65°C to 80°C according to the user-set curve. Once the water temperature reaches the set value, the intake fans start. There are 4 sets of 16 intake fans, and their activation is determined by 6 temperature sensors inside the drying chamber. Uneven temperature inside the drying chamber will activate more intake fans, and vice versa. Temperature balance in the drying chamber is regulated by adjusting the airflow. The exhaust fans are activated. There are 2 sets of exhaust fans, totaling 4, along with 6 humidity sensors. If the humidity inside the drying chamber exceeds the preset value, the exhaust fans will be activated to reduce the humidity. When the humidity inside the drying chamber differs significantly from the set value, more exhaust fans will be activated; conversely, when the humidity inside the drying chamber differs slightly from the set value, fewer exhaust fans will be activated.

[0029] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A fully automatic hydrothermal circulating constant temperature drying equipment, comprising a drying chamber, characterized in that, It also includes a control system and a heating system, wherein the control system is used for user-set data and to control the heating system, and the heating system is used to control the temperature and humidity inside the drying room; The control system includes a controller, an exhaust fan relay, a main fan relay, an ignition relay, a water inlet solenoid valve, a drain solenoid valve, a reflux pump control valve, a natural gas pressure collector, a boiler water temperature and pressure collector, and a drying room temperature and humidity collector. The output of the controller is connected to the input of the exhaust fan relay, the reflux pump control valve, the water inlet solenoid valve, the drain solenoid valve, the main fan relay, and the ignition relay, respectively. The input of the controller is connected to the output of the natural gas pressure collector, the boiler water temperature and pressure collector, and the drying room temperature and humidity collector, respectively. The drying room is equipped with an exhaust fan (17), an air inlet fan (18), a finned heat exchanger (14), and a temperature and humidity sensor (21). The heating system includes a heater (1) and a pressure water tank (2). The heater (1) heats the pressure water tank (2). An ignition ring (3) is provided on the heater (1). A natural gas inlet pipe (4) is also provided on the heater (1). The natural gas inlet pipe (4) is connected to a natural gas pressure sensor (5) and a natural gas proportional valve (6) in sequence, and then connected to external natural gas. A tap water inlet pipe (7) is also provided on the pressure water tank (2). The tap water inlet pipe (7) is connected to an inlet valve (8), and then connected to external tap water. Connection; the pressure tank (2) is also equipped with a pressure relief valve (9), which is also connected to a pressure gauge (10). The pressure tank (2) is connected in sequence to a reflux pump (11), a drain solenoid valve, a water pressure and temperature sensor (13), and then connected to a fin heat exchanger (14). The natural gas pressure sensor (5) and the natural gas proportional valve (6) are connected to the controller. The water inlet solenoid valve is connected to the water inlet valve (8). The drain solenoid valve is connected to the drain valve (12). The reflux pump control valve is connected to the reflux pump (11).

2. The fully automatic hydrothermal circulating constant temperature drying equipment according to claim 1, characterized in that: The control system includes a physical keyboard, an audio-visual prompt module, and a magnetic door opener; the output of the controller is connected to the input of the audio-visual prompt module; the input of the controller is connected to the output of the physical keyboard; the controller is also connected to a touch screen and a transformer.

3. The fully automatic hydrothermal circulating constant temperature drying equipment according to claim 1, characterized in that: The drying room is equipped with a left drying room door magnet (15), a right drying room door magnet (16), an air outlet (19), and an air inlet (20).

4. The fully automatic hydrothermal circulating constant temperature drying equipment according to claim 1, characterized in that: The ignition relay is connected to the ignition coil (3), the main fan relay is connected to the intake fan (18), and the exhaust fan relay is connected to the exhaust fan (17).

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