An energy-saving constant temperature and humidity air supply system and method for tunnel ventilation and heat transfer experiments

Abstract

The present invention discloses an energy-saving constant temperature and humidity air supply system and method for tunnel ventilation and heat transfer experiments. The system includes a constant humidity unit and a constant temperature test chamber; a water tank is provided in the constant temperature test chamber, and a refrigeration module and an air flow module are provided on the water tank; a heating module is also provided in the water tank; the method includes: 1. checking the water level in the water tank; 2. data storage; 3. starting the constant humidity unit; 4. determining the working mode; 5. starting the heating module; and 6. starting the refrigeration module. The present invention combines the refrigeration module, the air flow module, and the heating module, resulting in a simple system structure and easy maintenance. The system meets the requirements of the tunnel air flow for air volume and temperature during physical similarity simulation, and combines a humidity sensor and a humidistat to control the humidity in the tunnel, effectively ensuring the humidity in the tunnel, laying a foundation for solving tunnel ventilation and heat transfer research. The air flow is recycled under the action of a high-pressure fan, achieving the purpose of energy saving.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel ventilation and heat transfer experiments, and in particular relates to an energy-saving constant temperature and humidity air supply system and method for tunnel ventilation and heat transfer experiments. Background Art

[0002] An increasing number of mines are now operating at depths, and these mines are generally facing the problem of heat damage. Working in high-temperature environments severely impacts personnel health, reduces productivity, and increases the risk of mine accidents. Mine heat damage has seriously impacted underground production safety. Currently, the main solutions to mine heat damage include artificial refrigeration and ventilation cooling. Due to the high cost of artificial refrigeration, ventilation has become a cost-effective method for cooling the air in mines and the primary method of choice for mine heat damage management.

[0003] After the tunnel mining is completed, the mine will be ventilated to prevent the high temperature from harming the workers. Since the ventilation temperature is low, when the wind flows through the tunnel, due to the temperature difference between it and the surrounding rock, the surrounding rock will exchange heat with the wind. As the ventilation time increases, heat transfer also occurs inside the surrounding rock. The heat transfer inside the surrounding rock mass includes the convection heat exchange between groundwater and rock mass in pores and cracks, and thermal radiation between rock masses. Therefore, tunnel ventilation heat transfer is a complex process.

[0004] Existing research on roadway ventilation and heat transfer primarily involves numerically simulating the flow and heat transfer of air in horizontal roadways, determining the temperature distribution within the roadway, analyzing numerical results of the roadway outlet air temperature, and exploring the influence of factors such as inlet air volume, inlet air temperature, and wall temperature on the roadway ventilation and cooling effect. This provides a theoretical basis for the actual roadway ventilation and cooling process in mine production. However, during field testing, the actual operating conditions are complex, and theoretical solutions alone cannot accurately reflect the actual roadway ventilation and heat transfer. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide an energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments, which combines the refrigeration module, the airflow module and the heating module, and has a simple system structure and is easy to maintain; it is arranged together with the water tank in a constant temperature test box, providing a device that can simulate the tunnel airflow, meeting the requirements of the tunnel airflow on air volume and temperature when performing physical similarity simulation, and combining with a humidity sensor and a humidistat to control the humidity in the tunnel at the same time, effectively ensuring the humidity in the tunnel, and laying the foundation for solving the research on tunnel ventilation and heat transfer; the airflow is recycled under the action of the high-pressure fan, and the airflow after passing through the tunnel is filtered and returned to the high-pressure fan, thereby achieving the purpose of energy saving.

[0006] To solve the above technical problems, the present invention adopts a technical solution: an energy-saving constant temperature and humidity air supply system and method for tunnel ventilation and heat transfer experiments, characterized in that the method comprises the following steps:

[0007] It includes a constant humidity unit arranged in the lane and a constant temperature test box connected to the lane, one end of the lane is connected to one side of the constant temperature test box through an air outlet pipe, and the other end of the lane is connected to the other side of the constant temperature test box through a return air pipe;

[0008] The constant humidity unit includes a humidity sensor disposed in the lane and a humidistat in communication with the lane;

[0009] A water tank is provided in the constant temperature test box, and a refrigeration module and an air flow module are provided on the water tank, and the refrigeration module and the air flow module are both arranged in the constant temperature test box; a heating module is also provided in the water tank;

[0010] The water tank is provided with a water inlet and a water outlet; a first temperature monitor is provided in the water tank, and a capacitive liquid level sensor is provided on the side wall of the water tank; a third temperature monitor and an air volume sensor are provided in the section of the air outlet pipe close to the lane, and a fourth temperature monitor is provided in the section of the return air pipe close to the high-pressure blower; a second temperature monitor is provided in the constant temperature test box;

[0011] The water tank is provided with a control panel, the control panel is provided with a circuit board, the circuit board is integrated with a controller and an alarm, a display and a memory all connected to the controller, the signal output end of the humidity sensor, the signal output end of the first temperature monitor, the signal output end of the second temperature monitor, the signal output end of the third temperature monitor, the signal output end of the air volume sensor, the signal output end of the fourth temperature monitor, and the signal output end of the capacitive liquid level sensor are connected to the signal input end of the controller;

[0012] The refrigeration module includes a compressor arranged on one side of the water tank, a condenser arranged on the top of the water tank, and an evaporation tube arranged in the water tank; the compressor and the condenser are connected by a first connecting pipe, the condenser and the evaporation tube are connected by a second connecting pipe, and the compressor and the evaporation tube are connected by a third connecting pipe; a fan is provided on the top of the water tank, and the fan is horizontally arranged above the condenser;

[0013] The heating module includes a high-temperature heating pipe arranged at the bottom of the water tank and a heating controller arranged outside the water tank and connected to the high-temperature heating pipe, and the high-temperature heating pipe and the heating controller are connected via a heating pipe wire;

[0014] The airflow module includes a high-pressure fan arranged on one side of the water tank and a rectangular spiral heat exchanger arranged in the water tank and coordinated with the high-pressure fan. The air outlet of the high-pressure fan and the air inlet of the rectangular spiral heat exchanger are connected by an air inlet pipe, and the air inlet of the high-pressure fan and the air outlet of the rectangular spiral heat exchanger are connected by a return air component.

[0015] The above-mentioned energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments is characterized in that: a stirring plate is provided in the water tank, and the stirring plate is arranged along the width direction of the water tank; a stirring shaft is vertically provided in the middle of the stirring plate, and the top of the stirring shaft is rotatably connected to the bottom of the top plate of the water tank.

[0016] The above-mentioned energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments is characterized in that: an expansion valve is provided on the second connecting pipe; the evaporation tube is arranged on the inner wall of the water tank, and the evaporation tube is arranged in a serpentine shape on the inner wall of the water tank.

[0017] The above-mentioned energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments is characterized in that: the return air component includes an outlet duct connected between the rectangular spiral heat exchanger and the tunnel, and a return air duct connected between the high-pressure fan and the tunnel; a three-way valve is provided at the connection between the return air duct and the high-pressure fan, and a filter is provided at the end of the return air duct close to the high-pressure fan.

[0018] The present invention also provides a method for energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments, wherein the method comprises the following steps:

[0019] Step 1: Check the water level in the water tank: A capacitive liquid level sensor measures the liquid level in the water tank; when the water level fails to submerge the evaporation tube, an alarm sounds, the water inlet is opened, and water is added to the water tank until the alarm stops sounding, and then step 2 is performed; when the water level submerges the evaporation tube, step 3 is performed;

[0020] Step 2: Data storage: Set the humidity H in the tunnel, the air volume Q passing through the tunnel, and the air temperature T in the tunnel and save them to the memory synchronously;

[0021] Step 3: Start the constant humidity unit: The humidity sensor measures the humidity H1 in the lane. When H1>H, adjust the humidistat to reduce the power of the humidistat until H1=H; when H1<H, adjust the humidistat to increase the power of the humidistat until H1=H; when H1=H, maintain the power of the humidistat; wherein H1 is the actual humidity in the lane;

[0022] Step 4, determining the working mode: the first temperature monitor measures the water temperature t in the water tank. When t<T, execute step 4; when t>T, execute step 5;

[0023] Step 5: Start the heating module. The process is as follows:

[0024] Step 501: Start the heating controller, the high-temperature heating tube starts heating, and the first temperature monitor measures the water temperature t in the water tank until tT>5°C;

[0025] Step 502: Start the high-pressure blower, and the air enters the rectangular spiral heat exchanger through the air inlet pipe. After exchanging heat with the heated water in the water tank in the rectangular spiral heat exchanger, the air enters the tunnel through the air outlet pipe.

[0026] Step 503: Simultaneously, the third temperature monitor measures the temperature t1 of the air entering the tunnel. When t1>T, the heating controller is adjusted to reduce the power of the high-temperature heating tube until t1=T; when t1<T, the heating controller is adjusted to increase the power of the high-temperature heating tube until t1=T; when t1=T, the power of the high-temperature heating tube is maintained. t1 is the actual temperature of the air entering the tunnel.

[0027] Step 504: The air volume sensor measures the air flow rate Q1 entering the laneway. When Q1>Q, the high-pressure fan is adjusted to reduce the air volume of the high-pressure fan until Q1=Q; when Q1<Q, the high-pressure fan is adjusted to increase the air volume of the high-pressure fan until Q1=Q; when Q1=Q, the air volume of the high-pressure fan is maintained. Q1 is the actual air flow rate entering the laneway.

[0028] Step 6: Start the cooling module. The process is as follows:

[0029] Step 601: Start the compressor and the fan. The refrigerant passes through the compressor and the condenser and enters the evaporator tube. The refrigerant vaporizes in the evaporator tube and cools the water in the water tank. The first temperature monitor measures the water temperature t in the water tank until tT < 5°C.

[0030] Step 602: Start the high-pressure blower, and the air enters the rectangular spiral heat exchanger through the air inlet pipe. After exchanging heat with the refrigerated water in the water tank in the rectangular spiral heat exchanger, the air enters the tunnel through the air outlet pipe.

[0031] Step 603: Simultaneously, the third temperature monitor measures the temperature t1 of the air entering the tunnel. When t1>T, the compressor is adjusted to increase the power of the compressor until t1=T; when t1<T, the compressor is adjusted to reduce the power of the compressor until t1=T; when t1=T, the compressor power is maintained.

[0032] Step 604: The air volume sensor measures the air flow Q1 entering the tunnel. When Q1>Q, the high-pressure fan is adjusted to reduce the air volume of the high-pressure fan until Q1=Q; when Q1<Q, the high-pressure fan is adjusted to increase the air volume of the high-pressure fan until Q1=Q; when Q1=Q, the air volume of the high-pressure fan is maintained.

[0033] The above-mentioned method for energy-saving constant temperature and humidity air supply to the tunnel is characterized in that: in step five, if cooling operation is required immediately after the water in the water tank is heated according to experimental requirements, cooling operation can only be performed after the water temperature naturally cools down to below 40°C.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1. The present invention combines the refrigeration module, the airflow module and the heating module, and the system structure is simple and easy to maintain; together with the water tank, it is arranged in a constant temperature test box, providing a device that can simulate the tunnel airflow, meeting the requirements of the tunnel airflow for air volume and temperature when performing physical similarity simulation, and combined with the humidity sensor and the humidistat, the humidity in the tunnel is controlled at the same time, effectively ensuring the humidity in the tunnel, laying the foundation for solving the research on tunnel ventilation and heat transfer.

[0036] 2. The present invention recycles the airflow under the action of the high-pressure fan. The airflow after passing through the lane is filtered and returned to the high-pressure fan, thereby achieving the purpose of energy saving.

[0037] 3. In the present invention, water is used as both the heating source and the cooling source for the airflow. The airflow exchanges heat with water in the rectangular spiral heat exchanger in the water tank instead of directly using electric heating or air cooling, which can make the airflow heated more evenly.

[0038] 4. The present invention utilizes the controller to precisely control the refrigeration module, the heating module, and the air flow module, thereby meeting the temperature and air volume adjustment requirements during the experiment, and the operation is convenient and simple.

[0039] In summary, the present invention combines the refrigeration module, the airflow module and the heating module, and the system structure is simple and easy to maintain; it is arranged together with the water tank in a constant temperature test box, providing a device that can simulate the tunnel airflow, meeting the requirements of the tunnel airflow for air volume and temperature when performing physical similarity simulation, and combined with the humidity sensor and the humidistat, the humidity in the tunnel is controlled at the same time, effectively ensuring the humidity in the tunnel, laying the foundation for solving the research on tunnel ventilation and heat transfer; under the action of the high-pressure fan, the airflow is recycled, and the airflow after passing through the tunnel is filtered and returned to the high-pressure fan, achieving the purpose of energy saving.

[0040] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the present invention.

[0042] Figure 2 It is a top view of the constant temperature test box of the present invention.

[0043] Figure 3 Schematic diagram of the connection relationship between the water tank, heating module, rectangular spiral heat exchanger, and evaporation tube of the present invention.

[0044] Figure 4 It is a top view of the water tank of the present invention.

[0045] Figure 5 This is a circuit principle block diagram of the present invention.

[0046] Figure 6 It is a flowchart of the method of the present invention.

[0047] Description of the accompanying drawings:

[0048] 1—water tank; 2—compressor; 3—condenser;

[0049] 4—evaporation tube; 5—first connecting tube; 6—second connecting tube;

[0050] 7—third connecting pipe; 8—expansion valve; 9—fan;

[0051] 10—stirring plate; 11—high-temperature heating tube; 12—heating controller;

[0052] 13—Heating pipe conductor; 14—High-pressure fan; 15—Rectangular spiral heat exchanger;

[0053] 16—air inlet pipe; 17—tunnel; 18—air outlet pipe;

[0054] 19—return air duct; 20—three-way valve; 21—filter;

[0055] 22—water inlet; 23—drain outlet; 24—control panel;

[0056] 25—first temperature monitor; 26—capacitive liquid level sensor; 27—third temperature monitor;

[0057] 28—Fourth temperature monitor; 29—Second temperature monitor; 30—Constant temperature test chamber;

[0058] 31 - alarm; 32 - display; 33 - memory;

[0059] 34—Stirring shaft; 35—Air volume sensor; 36—Controller;

[0060] 37—Humidity sensor; 38—Hygrostat. DETAILED DESCRIPTION

[0061] like Figures 1 to 5 The energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments shown in the figure includes a constant humidity unit disposed in the tunnel 17 and a constant temperature test box 30 connected to the tunnel 17. One end of the tunnel 17 is connected to one side of the constant temperature test box 30 via an air outlet pipe 18, and the other end of the tunnel 17 is connected to the other side of the constant temperature test box 30 via a return air pipe 19.

[0062] The constant humidity unit includes a humidity sensor 37 disposed in the lane 17 and a humidistat 38 in communication with the lane 17;

[0063] The constant temperature test box 30 is provided with a water tank 1, and a refrigeration module and an air flow module are provided on the water tank 1. The refrigeration module and the air flow module are both arranged in the constant temperature test box 30; the water tank 1 is also provided with a heating module;

[0064] The water tank 1 is provided with a water inlet 22 and a water outlet 23; a first temperature monitor 25 is provided in the water tank 1, and a capacitive liquid level sensor 26 is provided on the side wall of the water tank 1; a third temperature monitor 27 and an air volume sensor 35 are provided in the section of the air outlet duct 18 near the lane 17, and a fourth temperature monitor 28 is provided in the section of the return air duct 19 near the high-pressure blower 14; a second temperature monitor 29 is provided in the constant temperature test box 30;

[0065] The water tank 1 is provided with a control panel 24, and a circuit board is provided on the control panel 24. The circuit board integrates a controller 36 and an alarm 31, a display 32 and a memory 33 all connected to the controller 36. The signal output end of the humidity sensor 37, the signal output end of the first temperature monitor 25, the signal output end of the second temperature monitor 29, the signal output end of the third temperature monitor 27, the signal output end of the air volume sensor 35, the signal output end of the fourth temperature monitor 28, and the signal output end of the capacitive liquid level sensor 26 are connected to the signal input end of the controller 36;

[0066] The refrigeration module includes a compressor 2 arranged on one side of the water tank 1, a condenser 3 arranged on the top of the water tank 1, and an evaporation tube 4 arranged in the water tank 1; the compressor 2 and the condenser 3 are connected by a first connecting pipe 5, the condenser 3 and the evaporation tube 4 are connected by a second connecting pipe 6, and the compressor 2 and the evaporation tube 4 are connected by a third connecting pipe 7; a fan 9 is provided on the top of the water tank 1, and the fan 9 is horizontally arranged above the condenser 3;

[0067] The heating module includes a high-temperature heating pipe 11 provided at the bottom of the water tank 1 and a heating controller 12 provided outside the water tank 1 and connected to the high-temperature heating pipe 11. The high-temperature heating pipe 11 and the heating controller 12 are connected via a heating pipe wire 13.

[0068] The air flow module includes a high-pressure fan 14 arranged on one side of the water tank 1 and a rectangular spiral heat exchanger 15 arranged in the water tank 1 and coordinated with the high-pressure fan 14. The air outlet of the high-pressure fan 14 and the air inlet of the rectangular spiral heat exchanger 15 are connected by an air inlet pipe 16, and the air inlet of the high-pressure fan 14 and the air outlet of the rectangular spiral heat exchanger 15 are connected by a return air component.

[0069] The present invention combines the refrigeration module, the air flow module and the heating module, and the system structure is simple and easy to maintain; it is arranged together with the water tank 1 in a constant temperature test box 30, providing a device that can simulate the tunnel airflow, meeting the requirements of the tunnel airflow for air volume and temperature when performing physical similarity simulation, and combined with the humidity sensor 37 and the humidistat 38, the humidity in the tunnel is controlled at the same time, effectively ensuring the humidity in the tunnel, laying the foundation for solving the research on tunnel ventilation and heat transfer.

[0070] The present invention recycles the airflow under the action of the high-pressure blower 14, and the airflow after passing through the lane 17 is filtered and returned to the high-pressure blower 14, thereby achieving the purpose of energy saving.

[0071] In the present invention, water is used as both the heating source and the cooling source for the airflow. The airflow exchanges heat with water in the rectangular spiral heat exchanger 15 in the water tank 1 instead of directly using electric heating or air cooling, which can make the airflow heated more evenly.

[0072] The present invention utilizes the controller 36 to precisely control the refrigeration module, the heating module, and the air flow module, thereby meeting the temperature and air volume adjustment requirements during the experiment, and the operation is convenient and simple.

[0073] In actual use, the data monitored by the first temperature monitor 25, the second temperature monitor 29, the third temperature monitor 27, the fourth temperature monitor 28, and the capacitive liquid level sensor 26 are all transmitted to the control panel 24. The display 32 on the control panel 24 on the water tank 1 can display the temperature in the water tank 1, the temperature in the constant temperature test box 30, the air outlet temperature, the return air temperature, and the liquid level in the water tank 1;

[0074] The capacitive liquid level sensor 26 is used to monitor the water level in the water tank 1. When the water level fails to submerge the evaporation tube 4 and the high-temperature heating tube 11, the alarm 31 will automatically sound an alarm.

[0075] It should be noted that the temperature data measured by the first temperature monitor 25 provided in the water tank 1 is displayed in real time on the display 32. The controller 36 controls the operating power of the compressor 2 based on the difference between the water tank temperature and the set water temperature to achieve the desired water temperature. The set water temperature is pre-stored in the memory 33. Utilizing the first temperature monitor 25 provided in the water tank 1, the heating controller 12 controls the heating power of the high-temperature heating pipe 11 based on the difference between the temperature data measured by the first temperature monitor 25 in the water and the water temperature set in the controller 36 to achieve the desired water temperature.

[0076] In particular, when the refrigeration module is working, if the controller 36 identifies that the temperature monitored by the fourth temperature monitor 28 arranged in the return air duct 19 is more than 1°C higher than the room temperature monitored by the second temperature monitor 29, the three-way valve 20 rotates to close the inlet to the high-pressure fan 14, and no circulation operation is performed; when the heating module is working, if the controller 36 identifies that the temperature monitored by the fourth temperature monitor 28 arranged in the return air duct 19 is more than 1°C lower than the room temperature monitored by the second temperature monitor 29, the three-way valve 20 rotates to close the inlet to the high-pressure fan 14, and no circulation operation is performed.

[0077] like Figure 3 and Figure 4 As shown, the water in the water tank 1 is cooled by the evaporation tube 4, and then the gaseous low-temperature and low-pressure refrigerant enters the compressor 2 for circulation again. This cycle is repeated, so that the temperature in the water tank 1 can be reduced to achieve a cooling effect.

[0078] In actual use, the high-temperature heating pipe 11 is arranged at the bottom of the water tank 1 to heat the water in the water tank 1. The left and right ends of the high-temperature heating pipe 11 are respectively connected to the heating controller 12 through the heating pipe wire 13; the high-temperature heating pipe 11 is arranged in a serpentine shape at the bottom of the water tank 1.

[0079] like Figure 3 and Figure 4 As shown, in this embodiment, a stirring plate 10 is provided in the water tank 1, and the stirring plate 10 is arranged along the width direction of the water tank 1; a stirring shaft 34 is vertically provided in the middle of the stirring plate 10, and the top of the stirring shaft 34 is rotatably connected to the bottom of the top plate of the water tank 1.

[0080] In actual use, the stirring plate 10 is driven by the stirring shaft 34 in the middle to rotate, so that the stirring plate 10 rotates in the water tank 1 to stir the water in the water tank 1. The stirring action of the stirring plate 10 can make the temperature in the water tank 1 uniform.

[0081] like Figure 2 As shown, in this embodiment, an expansion valve 8 is provided on the second connecting pipe 6; the evaporation tube 4 is arranged on the inner wall of the water tank 1, and the evaporation tube 4 is arranged on the inner wall of the water tank 1 in a serpentine shape.

[0082] In actual use, the compressor 2 compresses the gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, which is then sent through the first connecting pipe 5 to the condenser 3 placed on top of the water tank 1. A fan 9 installed above the condenser 3 dissipates heat from the condenser 3, and the refrigerant becomes a high-pressure, room-temperature liquid refrigerant after heat dissipation. The refrigerant then passes through the second connecting pipe 6 to the expansion valve 8, where it is converted into a low-pressure, room-temperature liquid spray. It then enters the evaporator 4, where the liquid refrigerant vaporizes and becomes a low-temperature, gaseous refrigerant, thereby absorbing a large amount of heat and cooling the evaporator 4. In particular, the outside of the water tank 1 is wrapped with insulation material to insulate the water tank 1.

[0083] like Figure 2 As shown, in this embodiment, the return air assembly includes an outlet pipe 18 connected between the rectangular spiral heat exchanger 15 and the alley 17, and a return air pipe 19 connected between the high-pressure fan 14 and the alley 17; a three-way valve 20 is provided at the connection between the return air pipe 19 and the high-pressure fan 14, and a filter 21 is provided at the end of the return air pipe 19 near the high-pressure fan 14.

[0084] In actual use, the high-pressure fan 14 converts the air into a high-speed airflow, which then passes through the air intake pipe 16 and the rectangular spiral heat exchanger 15 placed in the middle of the water tank 1 for heat exchange. The airflow with changed temperature is then sent to the alley 17 through the air outlet pipe 18, and then passes through the return air pipe 19 to the airflow filter 21 for filtering before entering the high-pressure fan 14 for circulation, thereby achieving energy saving.

[0085] like Figures 1 to 6 A method for providing energy-saving constant temperature and humidity air supply to a laneway using an energy-saving constant temperature and humidity air supply system for a laneway ventilation and heat transfer experiment is shown, and the method comprises the following steps:

[0086] Step 1: Check the water level in the water tank: The capacitive liquid level sensor 26 measures the liquid level in the water tank 1; when the water level fails to submerge the evaporation tube 4, the alarm 31 sounds, the water inlet 22 is opened, and water is added to the water tank 1 until the alarm 31 stops sounding, and then step 2 is executed; when the water level submerges the evaporation tube 4, step 3 is executed;

[0087] Step 2: Data storage: Set the humidity H in the lane 17, the air volume Q passing through the lane 17, and the air temperature T in the lane 17 and save them to the memory 33 simultaneously;

[0088] Step 3: Start the constant humidity unit: The humidity sensor 37 measures the humidity H1 in the lane 17. When H1>H, the humidistat 38 is adjusted to reduce the power of the humidistat 38 until H1=H; when H1<H, the humidistat 38 is adjusted to increase the power of the humidistat 38 until H1=H; when H1=H, the power of the humidistat 38 is maintained. Wherein, H1 is the actual humidity in the lane 17;

[0089] Step 4: Determine the working mode: The first temperature monitor 25 measures the water temperature t in the water tank 1. When t < T, execute step 4; when t > T, execute step 5;

[0090] Step 5: Start the heating module. The process is as follows:

[0091] Step 501: Start the heating controller 12, the high-temperature heating tube 11 starts heating, and the first temperature monitor 25 measures the water temperature t in the water tank 1 until tT>5°C;

[0092] Step 502: Start the high-pressure blower 14. The air enters the rectangular spiral heat exchanger 15 through the air inlet pipe 16. After exchanging heat with the heated water in the water tank 1 in the rectangular spiral heat exchanger 15, the air passes through the air outlet pipe 18 and enters the tunnel 17.

[0093] Step 503: Simultaneously, the third temperature monitor 27 measures the temperature t1 of the air entering the tunnel 17. When t1>T, the heating controller 12 is adjusted to reduce the power of the high-temperature heating tube 11 until t1=T; when t1<T, the heating controller 12 is adjusted to increase the power of the high-temperature heating tube 11 until t1=T; when t1=T, the power of the high-temperature heating tube 11 is maintained. t1 is the actual temperature of the air entering the tunnel 17.

[0094] Step 504: The air volume sensor 35 measures the air flow Q1 entering the lane 17. When Q1>Q, the high-pressure fan 14 is adjusted to reduce the air volume of the high-pressure fan 14 until Q1=Q; when Q1<Q, the high-pressure fan 14 is adjusted to increase the air volume of the high-pressure fan 14 until Q1=Q; when Q1=Q, the air volume of the high-pressure fan 14 is maintained. Q1 is the actual air flow entering the lane 17.

[0095] Step 6: Start the cooling module. The process is as follows:

[0096] Step 601: Start the compressor 2 and the fan 9. The refrigerant passes through the compressor 2 and the condenser 3 and enters the evaporator tube 4. The refrigerant vaporizes in the evaporator tube 4 to cool the water in the water tank 1. The first temperature monitor 25 measures the water temperature t in the water tank 1 until tT < 5°C.

[0097] Step 602: Start the high-pressure blower 14. The air enters the rectangular spiral heat exchanger 15 through the air inlet pipe 16. After exchanging heat with the refrigerated water in the water tank 1 in the rectangular spiral heat exchanger 15, the air passes through the air outlet pipe 18 and enters the tunnel 17.

[0098] Step 603: Simultaneously, the third temperature monitor 27 measures the temperature t1 of the air entering the tunnel 17. When t1>T, the compressor 2 is adjusted to increase the power of the compressor 2 until t1=T; when t1<T, the compressor 2 is adjusted to reduce the power of the compressor 2 until t1=T; and when t1=T, the power of the compressor 2 is maintained.

[0099] Step 604: The air volume sensor 35 measures the air flow Q1 entering the tunnel 17. When Q1>Q, the high-pressure fan 14 is adjusted to reduce the air volume of the high-pressure fan 14 until Q1=Q; when Q1<Q, the high-pressure fan 14 is adjusted to increase the air volume of the high-pressure fan 14 until Q1=Q; when Q1=Q, the air volume of the high-pressure fan 14 is maintained.

[0100] In actual use, when heating or cooling is performed, once the high-temperature heating pipe 11 and the compressor 2 stop working, the temperature in the water tank 1 will not be constant. Therefore, when heating or cooling is performed, the high-temperature heating pipe 11 and the compressor 2 will continue to work, and will only stop when the temperature meets the standard. Once the temperature does not meet the requirements, they will continue to work.

[0101] In this embodiment, in step five, if cooling operation is required immediately after the water in the water tank 1 is heated according to the experimental requirements, the cooling operation can be performed only after the water temperature naturally cools down to below 40°C.

[0102] In actual use, the high-temperature water in the water tank 1 cannot directly start the refrigeration module for cooling and cooling, so as to avoid damaging the evaporation tube 4.

[0103] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments, characterized by: It comprises a constant humidity unit arranged in the lane (17) and a constant temperature test box (30) connected to the lane (17), one end of the lane (17) is connected to one side of the constant temperature test box (30) through an air outlet pipe (18), and the other end of the lane (17) is connected to the other side of the constant temperature test box (30) through a return air pipe (19); The constant humidity unit includes a humidity sensor (37) disposed in the lane (17) and a humidistat (38) in communication with the lane (17); A water tank (1) is provided in the constant temperature test box (30), and a refrigeration module and an air flow module are provided on the water tank (1), and both the refrigeration module and the air flow module are arranged in the constant temperature test box (30); a heating module is also provided in the water tank (1); The water tank (1) is provided with a water inlet (22) and a water outlet (23); a first temperature monitor (25) is provided in the water tank (1), and a capacitive liquid level sensor (26) is provided on the side wall of the water tank (1); a third temperature monitor (27) and an air volume sensor (35) are provided in the section of the air outlet pipe (18) close to the lane (17), and a fourth temperature monitor (28) is provided in the section of the air return pipe (19) close to the high-pressure blower (14); a second temperature monitor (29) is provided in the constant temperature test box (30); The water tank (1) is provided with a control panel (24), the control panel (24) is provided with a circuit board, the circuit board is integrated with a controller (36) and an alarm (31), a display (32) and a memory (33) all connected to the controller (36), the signal output end of the humidity sensor (37), the signal output end of the first temperature monitor (25), the signal output end of the second temperature monitor (29), the signal output end of the third temperature monitor (27), the signal output end of the air volume sensor (35), the signal output end of the fourth temperature monitor (28), and the signal output end of the capacitive liquid level sensor (26) are connected to the signal input end of the controller (36); The refrigeration module comprises a compressor (2) arranged on one side of the water tank (1), a condenser (3) arranged on the top of the water tank (1), and an evaporation tube (4) arranged in the water tank (1); the compressor (2) and the condenser (3) are connected via a first connecting tube (5), the condenser (3) and the evaporation tube (4) are connected via a second connecting tube (6), and the compressor (2) and the evaporation tube (4) are connected via a third connecting tube (7); a fan (9) is provided on the top of the water tank (1), and the fan (9) is arranged horizontally above the condenser (3); The heating module comprises a high-temperature heating pipe (11) arranged at the bottom of the water tank (1) and a heating controller (12) arranged outside the water tank (1) and connected to the high-temperature heating pipe (11), wherein the high-temperature heating pipe (11) and the heating controller (12) are connected via a heating pipe wire (13); The air flow module comprises a high-pressure fan (14) arranged on one side of the water tank (1) and a rectangular spiral heat exchanger (15) arranged in the water tank (1) and cooperating with the high-pressure fan (14); the air outlet of the high-pressure fan (14) and the air inlet of the rectangular spiral heat exchanger (15) are connected via an air inlet pipeline (16); and the air inlet of the high-pressure fan (14) and the air outlet of the rectangular spiral heat exchanger (15) are connected via a return air component.

2. The energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments according to claim 1 is characterized by: A stirring plate (10) is provided in the water tank (1), and the stirring plate (10) is arranged along the width direction of the water tank (1); a stirring shaft (34) is vertically provided in the middle of the stirring plate (10), and the top of the stirring shaft (34) is rotatably connected to the bottom of the top plate of the water tank (1).

3. The energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments according to claim 1 is characterized by: An expansion valve (8) is provided on the second connecting pipe (6); the evaporation pipe (4) is arranged on the inner wall of the water tank (1), and the evaporation pipe (4) is arranged on the inner wall of the water tank (1) in a serpentine shape.

4. The energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments according to claim 1 is characterized by: The return air assembly comprises an air outlet pipe (18) connected between the rectangular spiral heat exchanger (15) and the lane (17), and a return air pipe (19) connected between the high-pressure fan (14) and the lane (17); a three-way valve (20) is provided at the connection between the return air pipe (19) and the high-pressure fan (14), and a filter (21) is provided at the end of the return air pipe (19) close to the high-pressure fan (14).

5. The method for energy-saving constant temperature and humidity air supply system for tunnel ventilation and heat transfer experiments according to claim 1 is characterized in that: The method comprises the following steps: Step 1, checking the water level in the water tank: the capacitive liquid level sensor (26) measures the liquid level in the water tank (1); when the water level fails to submerge the evaporation tube (4), the alarm (31) sounds an alarm, the water inlet (22) is opened, and water is poured into the water tank (1) until the alarm (31) stops sounding, and then step 2 is performed; when the water level submerges the evaporation tube (4), step 2 is performed; Step 2: Data storage: Set the humidity in the lane (17) , Air volume passing through the tunnel (17) and the wind temperature in the lane (17) and synchronously save it to the memory (33); Step 3: Start the constant humidity unit: the humidity sensor (37) measures the humidity in the lane (17). Take measurements, take measurements, When the humidity is less than 0.05, the humidity controller (38) is adjusted to reduce the power of the humidity controller (38) until ;when When the humidity is high, the humidistat (38) is adjusted to increase the power of the humidistat (38) until ;when , maintaining the power of the humidistat (38); wherein, is the actual humidity in the lane (17); Step 4: Determine the working mode: The first temperature monitor (25) measures the water temperature in the water tank (1). Take measurements when When , execute step 4; when When , execute step 5; Step 5: Start the heating module. The process is as follows: Step 501: Start the heating controller (12), the high-temperature heating tube (11) starts heating, and the first temperature monitor (25) monitors the water temperature in the water tank (1). Measure until ; Step 502: Start the high-pressure blower (14), and the air enters the rectangular spiral heat exchanger (15) through the air inlet pipe (16). After exchanging heat with the heated water in the water tank (1) in the rectangular spiral heat exchanger (15), the air enters the tunnel (17) through the air outlet pipe (18); Step 503: At the same time, the third temperature monitor (27) measures the temperature of the air entering the tunnel (17). When measuring, When the heating controller (12) is adjusted, the power of the high-temperature heating tube (11) is reduced until ;when When the heating controller (12) is adjusted, the power of the high-temperature heating tube (11) is increased until ;when When the power of the high-temperature heating tube (11) is maintained; wherein, is the actual air temperature entering the tunnel (17); Step 504: The air volume sensor (35) measures the air volume entering the tunnel (17). Take measurements, take measurements, When the high-pressure fan (14) is adjusted, the air volume of the high-pressure fan (14) is reduced until ;when When the high-pressure fan (14) is adjusted, the air volume of the high-pressure fan (14) is increased until ;when When the air volume of the high-pressure blower (14) is maintained; wherein, is the actual air flow entering the lane (17); Step 6: Start the cooling module. The process is as follows: Step 601, start the compressor (2) and the fan (9), and the refrigerant enters the evaporation tube (4) after passing through the compressor (2) and the condenser (3). The refrigerant vaporizes in the evaporation tube (4) and cools the water in the water tank (1); the first temperature monitor (25) monitors the water temperature in the water tank (1). Measure until ; Step 602: Start the high-pressure blower (14), and the air enters the rectangular spiral heat exchanger (15) through the air inlet pipe (16). After exchanging heat with the refrigerated water in the water tank (1) in the rectangular spiral heat exchanger (15), the air enters the lane (17) through the air outlet pipe (18); Step 603: At the same time, the third temperature monitor (27) measures the temperature of the air entering the tunnel (17). When measuring, When the compressor (2) is adjusted, the power of the compressor (2) is increased until ;when When the compressor (2) is adjusted, the power of the compressor (2) is reduced until ;when When the compressor (2) is operated, the power of the compressor (2) is maintained; Step 604: The air volume sensor (35) measures the air volume entering the tunnel (17). Take measurements, take measurements, When the high-pressure fan (14) is adjusted, the air volume of the high-pressure fan (14) is reduced until ;when When the high-pressure fan (14) is adjusted, the air volume of the high-pressure fan (14) is increased until ;when When the air volume of the high-pressure blower (14) is maintained.

6. The method for energy-saving constant temperature and humidity air supply to a tunnel according to claim 5, characterized in that: In step five, if cooling is required immediately after the water in the water tank (1) is heated according to the experimental requirements, the cooling operation can be performed only after the water temperature naturally cools down to below 40°C.

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