An integrated measurement and control device

Abstract

The present invention discloses an integrated measurement and control device, which includes a measured box and a measurement and control group. The measurement and control group includes an air box, a thermoelectric cooler, a spiral refrigeration air duct, a PLC controller, a humidity sensor, a temperature sensor, an air compressor, and a flow control valve. The air box is provided with an air duct, a wind control valve impeller mechanism located in the air duct, and two ventilation pipes. The air duct is arranged to penetrate one side of the measured box. The thermoelectric cooler is arranged in the air box. The spiral refrigeration air duct is located in the measured box and its two ends are respectively communicated with one ventilation pipe on the air box. The other ventilation pipe of the air box at one end of the spiral refrigeration air duct is communicated with the flow control valve through a pipeline. In the present invention, by setting the air box, the wind control valve impeller mechanism, the temperature sensor, the humidity sensor, the flow control valve, and the PLC controller, when the temperature in the measured box suddenly rises, it is closed for refrigeration and cooling, when the humidity in the measured box increases, it is ventilated and dehumidified, and when the measured box is normally ventilated and cooled.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature reduction, heat dissipation, measurement and control, and particularly relates to an integrated measurement and control device. Background Art

[0002] Control devices inside boxes such as electrical control boxes, distribution boxes, and database electrical boxes are prone to sudden high temperatures during use. That is to say, there is a peak working period for the electrical components inside the box. When the peak period is triggered, the temperature inside the box rises instantaneously. When it rises, it affects the normal operation of the electrical box and there is also a situation of open circuit. In addition, there is a situation of high humidity inside the box during use. That is to say, external moisture easily enters the box, increasing the humidity of the air inside the box. There is also a situation where a refrigeration component is provided inside the box. When the refrigeration component cools, water droplets easily appear on the inner wall of the measured box. The water droplets are inconvenient to drain and also easily increase the humidity inside the measured box, thus easily causing a short circuit situation for the electrical components.

[0003] In view of this, there is an urgent need in the market for an electrical box measurement and control device that can quickly cool down, ventilate and dissipate heat, and ventilate and dehumidify.

[0004] Therefore, the present invention provides an integrated measurement and control device. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated measurement and control device to solve the problems mentioned in the background art.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An integrated measurement and control device includes a measured box and a measurement and control group. The measurement and control group includes an air box, a Peltier cooler, a spiral refrigeration air duct, a PLC controller, a humidity sensor, a temperature sensor, an air compressor, and a flow control valve. The air box is provided with an air duct, a wind control valve impeller mechanism located in the air duct, and two ventilation pipes. The air duct is provided through one side of the measured box. The Peltier cooler is arranged inside the air box. The spiral refrigeration air duct is located inside the measured box and its two ends are respectively communicated with one ventilation pipe on the air box. The other ventilation pipe of the air box at one end of the spiral refrigeration air duct is communicated with the flow control valve through a pipeline. The other ventilation pipe of the air box at the other end of the spiral refrigeration air duct is communicated with the outside through a pipeline. The flow control valve is communicated with the air outlet of the air compressor through a pipeline. When the air flow rate in the flow control valve is a low-flow air flow, the air duct is in a closed state. The low-flow air flow passes through the Peltier cooler and enters the spiral refrigeration air duct, and then is discharged through the ventilation pipe communicated with the outside. When the flow rate in the flow control valve is a high-flow air flow, the air duct is in an open state, and the air duct of one air box blows air into the measured box, and the air duct of the other air box extracts air from the measured box.

[0008] As a further description of the above technical solution:

[0009] An arc-shaped ventilation cavity that tangentially connects two ventilation pipes is provided inside the bellows. An annular notch is provided in the air duct. The air control valve impeller mechanism includes an annular seal located inside the annular notch and coaxial with it. The annular seal is rotatably connected to the annular notch, and a wind plate located inside the arc-shaped ventilation cavity is fixedly provided on its outer peripheral wall. The air control valve impeller mechanism includes a fan blade seal plate located inside the annular seal. When the annular seal rotates at a low speed, the fan blade seal plate blocks the air duct. When the annular seal rotates at a high speed, the air duct opens, and the fan blade seal plate forms a fan blade shape.

[0010] As a further description of the above technical solution:

[0011] The fan blade seal plate includes a plurality of sector plates and counterweight rods. The outer arc wall of the sector plate is fixedly connected to a connecting shaft that is rotatably connected to the inner peripheral wall of the annular seal. A torsion spring is provided at the rotational connection between the connecting shaft and the annular seal. One end of the counterweight rod is fixedly connected to one side of the sector plate and near the tip.

[0012] As a further description of the above technical solution:

[0013] The bellows and two ventilation pipes thereon form a U shape. The refrigeration sheet is located inside the arc-shaped ventilation cavity and between the two ventilation pipes. The refrigeration sheet divides the two ventilation pipes and the arc-shaped ventilation cavity into a U-shaped ventilation cavity.

[0014] As a further description of the above technical solution:

[0015] The flow control valve includes a valve sleeve, a valve rod, and a control motor. The valve rod is sleeved inside the valve sleeve and is rotatably connected. A waist-shaped notch whose length is distributed along the circumference is provided on the outer peripheral wall of the valve rod. An air outlet channel that communicates with the waist-shaped notch is provided at one end of the valve rod. An air inlet pipe is fixedly connected to the outer peripheral wall of the valve sleeve, and an air outlet pipe opposite to the air outlet channel is provided at one end of the air inlet pipe. The air inlet pipe is communicated with the air outlet of the air compressor, and the air outlet pipe is communicated with the pipeline connected to the other ventilation pipe of the bellows at one end of the spiral refrigeration air duct. The control motor is fixedly provided at the other end of the valve sleeve, and its output shaft is fixedly connected to the other end of the valve rod.

[0016] As a further description of the above technical solution:

[0017] The PLC controller is electrically connected to the humidity sensor, the temperature sensor, and the control motor.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, by providing a bellows, a wind control valve impeller mechanism, a temperature sensor, a humidity sensor, a flow control valve, and a PLC controller, it is convenient to perform closed refrigeration and cooling when the temperature in the measured box suddenly rises, to ventilate and dehumidify when the humidity in the measured box increases, and to perform normal ventilation and heat dissipation for the measured box.

[0020] 2. In the present invention, by providing a wind control valve impeller mechanism, when the gas flows through the wind control valve impeller mechanism, the limit speed of rotation of the annular seal on the wind control valve impeller mechanism is higher, making the opening and closing control of the measured box more sensitive and greatly simplifying the control structure.

[0021] 3. In the present invention, by providing fan blade seals inside the annular seal, when the annular seal rotates at high speed, the fan blade seals become several fan-shaped plates in the shape of fan blades, and the rotation of the fan-shaped plates has the effect of driving the airflow to flow. This kind of setting can greatly improve the smoothness of the airflow entering and leaving the measured box and reduce the wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of an integrated measurement and control device proposed by the present invention;

[0023] Figure 2 is Figure 1 a schematic rear view structure diagram;

[0024] Figure 3 is a schematic structural diagram of the measurement and control group of an integrated measurement and control device proposed by the present invention;

[0025] Figure 4 is a schematic structural diagram of the overall connection of the flow control valve, bellows, and spiral refrigeration air duct of an integrated measurement and control device proposed by the present invention;

[0026] Figure 5 is a schematic sectional view structure diagram of the flow control valve of an integrated measurement and control device proposed by the present invention;

[0027] Figure 6 is a detailed schematic structural diagram of the bellows of an integrated measurement and control device proposed by the present invention;

[0028] Figure 7 is Figure 6 a schematic structure diagram after the air duct is closed in the figure.

[0029] Legend Explanation:

[0030] 1. Test box; 2. Measurement and control group; 21. Air box; 211. Air duct; 2111. Annular notch; 212. Air control valve impeller mechanism; 2121. Annular seal; 21211. Air plate; 2122. Fan blade seal plate; 21221. Sector plate; 212211. Connecting shaft; 21222. Counterweight bar; 213. Ventilation pipe; 214. Arc ventilation cavity; 22. Refrigeration sheet; 23. Spiral refrigeration air duct; 24. PLC controller; 25. Humidity sensor; 26. Temperature sensor; 27. Air compressor; 28. Flow control valve; 281. Valve sleeve; 2811. Inlet pipe; 2812. Outlet pipe; 282. Valve rod; 2821. Waist-shaped notch; 2822. Outlet air duct; 283. Control motor. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0032] Embodiment 1

[0033] Please refer to Figure 1-7 , an integrated measurement and control device, including a test box 1 and a measurement and control group 2. Circuit boards, control components, electrical components and other components that are prone to heat generation during energized operation are arranged in the test box 1. Such test boxes 1 have relatively high requirements for working temperature and humidity, such as main chassis, distribution box, central control box, etc.

[0034] The measurement and control group 2 includes an air box 21, a refrigeration sheet 22, a spiral refrigeration air duct 23, a PLC controller 24, a humidity sensor 25, a temperature sensor 26, an air compressor 27 and a flow control valve 28. The humidity sensor 25 and the temperature sensor 26 are used to detect the working temperature and working humidity in the test box 1. The refrigeration sheet 22 is made of semiconductor material, and the spiral refrigeration air duct 23 cools the air in the air box 21.

[0035] The air box 21 is provided with an air duct 211, an air control valve impeller mechanism 212 located in the air duct 211 and two ventilation pipes 213. The air duct 211 is arranged through one side of the test box 1, and the air duct 211 communicates the inside and outside of the test box 1. A refrigeration sheet 22 is arranged in the air box 21. When the refrigeration sheet 22 cools down, the air box 21 is in a low-temperature state.

[0036] The spiral refrigeration air duct 23 is located inside the box 1 to be measured, and its two ends are respectively connected to a ventilation pipe 213 on the air box 21. That is to say, the two ends of one spiral refrigeration air duct 23 are respectively connected to one air box 21. Another ventilation pipe 213 of the air box 21 located at one end of the spiral refrigeration air duct 23 is connected to the flow control valve 28 through a pipeline, and another ventilation pipe 213 of the air box 21 located at the other end of the spiral refrigeration air duct 23 is connected to the outside through a pipeline. The flow control valve 28 supplies air to one of the air boxes 21, and the air flow sequentially passes through the air box 21, the spiral refrigeration air duct 23 and the air box 21. The flow control valve 28 is connected to the air outlet of the air compressor 27 through a pipeline. The air compressor 27 provides air source for the flow control valve 28, and the flow control valve 28 has the function of regulating the air flow rate.

[0037] When the air flow rate in the flow control valve 28 is low-flow air, that is, when the output air pressure is low, the air duct 211 is in a closed state. At this time, the box 1 to be measured is in a closed state. During this process, the low-flow air passes through the refrigeration sheet 22 and enters the spiral refrigeration air duct 23, and then is discharged through the ventilation pipe 213 connected to the outside. The air flow passing through the refrigeration sheet 22 is cooled and enters the spiral refrigeration air duct 23. The spiral refrigeration air duct 23 extends the flow path. The spiral refrigeration air duct 23 is made of aluminum, and it exchanges heat with the temperature inside the box 1 to be measured, realizing the cooling treatment of the inner cavity of the box 1 to be measured. This kind of control is suitable for the situation where the temperature inside the box 1 to be measured rises rapidly. When the flow rate in the flow control valve 28 is high-flow air, the air duct 211 is in an open state. At this time, the inside of the box 1 to be measured is in a state of being connected to the outside. At this time, the refrigeration sheet 22 does not need to be powered for refrigeration, and the air duct 211 of one of the air boxes 21 blows air into the box 1 to be measured, and the air duct 211 of the other air box 21 exhausts air from the box 1 to be measured. This setting makes the inside of the box 1 to be measured in a state of circulating air cooling, so that the normal air cooling and heat dissipation occurs when the temperature inside the box 1 to be measured is constant.

[0038] Specifically, an arc-shaped ventilation cavity 214 that tangentially connects the two ventilation pipes 213 is arranged inside the air box 21. An annular notch 2111 is formed in the air duct 211. The air control valve impeller mechanism 212 includes an annular seal 2121 that is coaxial and located in the annular notch 2111. The annular seal 2121 is rotatably connected to the annular notch 2111, and a wind plate 21211 located in the arc-shaped ventilation cavity 214 is fixedly arranged on its outer peripheral wall. The two sides of the annular seal 2121 and the opposite sides in the annular notch 2111 are connected by bearings. After the air enters through one ventilation pipe 213 on the air box 21, it flows through the arc-shaped ventilation cavity 214 and is discharged through the other ventilation pipe 213. During this process, the flowing air flow will push the wind plate 21211 to realize the wind-driven function of rotating the annular seal 2121.

[0039] The risk control valve impeller mechanism 212 includes a fan blade sealing plate 2122 located within the annular seal 2121. When the annular seal 2121 rotates at a low speed (when the air flow pressure passing through the arc-shaped ventilation cavity 214 is low), the fan blade sealing plate 2122 blocks the air duct 211. When the annular seal 2121 rotates at a high speed (when the air flow pressure passing through the arc-shaped ventilation cavity 214 is high), the air duct 211 opens, and the fan blade sealing plate 2122 forms a fan blade shape. At this time, one air duct 211 intakes air into the measured box 1, and the other air duct 211 extracts the gas inside the measured box 1 outward. That is to say, the opening and closing of the fan blade sealing plate 2122 are controlled by the rotation speed of the annular seal 2121.

[0040] The above-mentioned fan blade sealing plate 2122 includes a number of sector plates 21221 and counterweight rods 21222. When a number of sector plates 21221 are in the same plane, they form a circular sealing plate that blocks the air duct 211. The outer arc wall of the sector plate 21221 is fixedly connected to a connecting shaft 212211 that is rotatably connected to the inner peripheral wall of the annular seal 2121. A torsion spring is provided at the rotational connection between the connecting shaft 212211 and the annular seal 2121. When the annular seal 2121 is in a stationary or low-speed rotation state, under the action of the torsion spring, a number of sector plates 21221 are in a state of blocking the air duct 211. Specifically, positioning holes for rotatably connecting to the connecting shaft 212211 are provided on the inner peripheral wall of the annular seal 2121, and the connecting shaft 212211 and the positioning holes adopt a sealed connection structure. The above-mentioned torsion spring adopts an existing torsion spring structure, which is sleeved on the connecting shaft 212211 and located outside the positioning hole (the structure for realizing the elastic torsion control of the torsion spring is an existing technology, so it is not shown in the figure). Specifically, a socket one for inserting one end of the torsion spring is provided on the inner peripheral wall of the annular wind ring 2121, and a socket two for inserting the other end of the torsion spring is provided on the outer wall of the connecting shaft 212211. Under the action of the torsion spring, when the sector plate 21221 swings, the connecting shaft 212211 can elastically twist back and forth. One end of the counterweight rod 21222 is fixedly connected to one side of the sector plate 21221 and near the tip. When the annular seal 2121 rotates at a high speed, due to the inertial resistance of the counterweight rod 21222, the sector plate 21221 will twist, and a number of sector plates 21221 will form a fan blade shape and generate wind driving force.

[0041] The bellows 21 and the two ventilation pipes 213 thereon form a U shape. The Peltier cooler 22 is located in the arc-shaped ventilation cavity 214 and between the two ventilation pipes 213. This setting enables the gas entering the bellows 21 to flow through the Peltier cooler 22 twice. This Peltier cooler 22 has the function of double-sided refrigeration, which improves the speed of cooling the air flow. The Peltier cooler 22 divides the two ventilation pipes 213 and the arc-shaped ventilation cavity 214 into a U-shaped ventilation cavity. It should be noted that the Peltier cooler 22 is made of semiconductor material. The principle of semiconductor refrigeration is that after being powered on, the two end faces of the thermocouple on it absorb heat and release heat respectively. That is to say, in order to meet the double-sided refrigeration function of the above-mentioned Peltier cooler 22, the Peltier cooler 22 can be composed of two semiconductor sheet bodies bonded together during implementation, with the refrigerating side facing outwards to achieve the double-sided refrigeration function. The heat generated by this combination method of the Peltier cooler 22 can install a heat dissipation conductor (not shown in the figure) on the heat-generating side where the two semiconductor sheet bodies face each other, penetrate the bellows 21 with the heat dissipation conductor, and then lead it out to the outside of the measured box 1. The heat generated by the semiconductor sheet body is discharged by the heat dissipation conductor to realize the heat dissipation of the semiconductor sheet body itself. This setting can improve the driving force of the air flow entering the bellows 21 on the wind plate 21211.

[0042] The flow control valve 28 includes a valve sleeve 281, a valve rod 282, and a control motor 283. The valve rod 282 is sleeved in the valve sleeve 281 and is rotatably connected. A waist-shaped notch 2821 with a length distributed along the circumferential direction is formed on the outer peripheral wall of the valve rod 282. An air outlet channel 2822 communicating with the waist-shaped notch 2821 is formed at one end of the valve rod 282. An air inlet pipe 2811 is fixedly connected to the outer peripheral wall of the valve sleeve 281, and an air outlet pipe 2812 opposite to the air outlet channel 2822 is provided at one end thereof. Rotate the valve rod 282 to connect the waist-shaped notch 2821 with the air inlet pipe 2811. As the part of the waist-shaped notch 2821 entering the space inside the air inlet pipe 2811 increases, the gas flow discharged from the air outlet pipe 2812 increases. When it comes to the function of flow regulation, the air inlet pipe 2811 is communicated with the air outlet of the air compressor 27, and the air outlet pipe 2812 is communicated with the pipeline connected to the other ventilation pipe 213 of the bellows 21 at one end of the spiral refrigeration air duct 23. The control motor 283 is fixedly arranged at the other end of the valve sleeve 281, and its output shaft is fixedly connected to the other end of the valve rod 282. The control motor 283 provides power for the rotation of the valve rod 282.

[0043] The PLC controller 24 is electrically connected to the humidity sensor 25, the temperature sensor 26, and the control motor 283. Both the temperature sensor 26 and the humidity sensor 25 start the control motor 283 through the PLC controller 24 to control the gas flow discharged by the flow control valve 28, where temperature control takes precedence over humidity control.

[0044] Working principle:

[0045] Case 1: When the temperature inside the measured box 1 is normal and ventilation and heat dissipation are required:

[0046] The temperature sensor 26 starts and controls the motor 283 through the PLC controller 24, and the valve rod 282 rotates to control the increase in the opening degree of the waist-shaped notch 2821.

[0047] The high-pressure gas in the air storage tank on the air compressor 27 sequentially enters a duct 211 in one of the two air boxes 21 through the flow control valve 28, then enters the arc-shaped ventilation cavity 214 and impacts the air plate 21211 at high speed. At this time, the annular seal 2121 rotates at high speed.

[0048] Due to the inertial force of the counterweight rod 21222, each sector plate 21221 will twist and form a wind blade shape. At this time, the duct 211 opens. One annular seal 2121 rotates to send the air outside into the measured box 1 by using the sector plate 21221, and the other annular seal 2121 rotates to extract the hot air in the measured box 1 outward by using the sector plate 21221, realizing the rapid circulation and heat dissipation of air cooling.

[0049] It should be noted that by changing the ventilation pipe 213 connecting the two air boxes 21 and the spiral refrigeration air duct 23, one duct 211 can supply air to the measured box 1, and the other duct 211 can extract air from the measured box 1.

[0050] Case 2: When the measured box 1 is in a humid state and ventilation and heat dissipation are required.

[0051] When the humidity in the measured box 1 exceeds the limit, on the basis of Case 1, the opening degree of the waist-shaped notch 2821 is increased, and the pressure of the gas discharged by the flow control valve 28 is further increased, thereby further increasing the flow velocity of the air flow in and out of the measured air box 21, accelerating the air flow in and out of the measured box 1, and quickly discharging the moisture in the measured box 1.

[0052] Case 3: When the measured box 1 is in a high-temperature state:

[0053] The temperature sensor 26 starts and controls the motor 283 through the PLC controller 24, the valve rod 282 rotates to control the lower opening degree of the waist-shaped notch 2821, and at the same time, the PLC controller 24 starts the thermoelectric cooler 22 to refrigerate.

[0054] The low-speed air flow flows through the flow control valve 28 and sequentially enters a duct 211 in one of the two air boxes 21. At the same time, the low-speed air flow flows through the spiral refrigeration air duct 23. After the refrigeration of the thermoelectric cooler 22, the spiral refrigeration air duct 23 cools the hot air in the measured box 1.

[0055] During the above cooling process, air enters the arc-shaped ventilation cavity 214 and impacts the wind plate 21211 at a low speed. At this time, the annular seal 2121 rotates slowly, and the counterweight rod 21222 is difficult to overcome the torsion of the torsion spring. Therefore, the fan blade seal plate 2122 is in a closed state, and then the two air ducts 211 are in a closed state, avoiding the leakage of cold air in the box 1 to be measured and greatly improving the refrigeration and cooling effect.

[0056] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An integrated measurement and control device, characterized in that, it includes a measured box (1) and a measurement and control group (2). The measurement and control group (2) includes an air box (21), a Peltier cooler (22), a spiral refrigeration air duct (23), a PLC controller (24), a humidity sensor (25), a temperature sensor (26), an air compressor (27) and a flow control valve (28). An air duct (211), a wind control valve impeller mechanism (212) located in the air duct (211) and two ventilation pipes (213) are provided on the air box (21). The air duct (211) is provided through one side of the measured box (1). The Peltier cooler (22) is arranged in the air box (21). The spiral refrigeration air duct (23) is located in the measured box (1) and its two ends are respectively communicated with one ventilation pipe (213) on the air box (21). The other ventilation pipe (213) of the air box (21) at one end of the spiral refrigeration air duct (23) is communicated with the flow control valve (28) through a pipeline. The other ventilation pipe (213) of the air box (21) at the other end of the spiral refrigeration air duct (23) is communicated with the outside through a pipeline. The flow control valve (28) is communicated with the air outlet of the air compressor (27) through a pipeline. An arc-shaped ventilation cavity (214) that tangentially communicates the two ventilation pipes (213) is arranged in the air box (21). An annular notch (2111) is formed in the air duct (211). The wind control valve impeller mechanism (212) includes an annular seal ring (2121) located in the annular notch (2111) and coaxial with it. The annular seal ring (2121) is rotatably connected with the annular notch (2111), and a wind plate (21211) located in the arc-shaped ventilation cavity (214) is fixedly arranged on its outer peripheral wall. The wind control valve impeller mechanism (212) includes a fan blade seal plate (2122) located in the annular seal ring (2121); When the air flow rate in the flow control valve (28) is a low-flow air flow, the annular seal ring (2121) is in a static or low-speed rotation state, and the fan blade seal plate (2122) blocks the air duct (211). The low-flow air flow passes through the Peltier cooler (22) and enters the spiral refrigeration air duct (23), and then is discharged through the ventilation pipe (213) communicated with the outside; When the air flow rate in the flow control valve (28) is a high-flow gas, the annular seal ring (2121) rotates at a high speed, the air duct (211) is opened, the fan blade seal plate (2122) forms a fan blade shape, and the air duct (211) of one air box (21) blows air into the measured box (1), and the air duct (211) of the other air box (21) extracts air from the measured box (1).

2. The integrated measurement and control device according to claim 1, characterized in that, The fan blade sealing plate (2122) includes a plurality of sector plates (21221) and counterweight rods (21222). A connecting shaft (212211) fixedly connected to the outer arc wall of the sector plate (21221) is rotatably connected to the inner peripheral wall of the annular seal (2121). A torsion spring is provided at the rotational connection between the connecting shaft (212211) and the annular seal (2121). One end of the counterweight rod (21222) is fixedly connected to one side of the sector plate (21221) near the tip.

3. The integrated measurement and control device according to claim 1, characterized in that the air box (21) and the two ventilation pipes (213) thereon form a U shape. The refrigerating sheet (22) is located in the arc-shaped ventilation cavity (214) and between the two ventilation pipes (213). The refrigerating sheet (22) divides the two ventilation pipes (213) and the arc-shaped ventilation cavity (214) into a U-shaped ventilation cavity.

4. The integrated measurement and control device according to claim 1, characterized in that the flow control valve (28) includes a valve sleeve (281), a valve rod (282), and a control motor (283). The valve rod (282) is sleeved in the valve sleeve (281) and is rotatably connected. A waist-shaped notch (2821) with a length distributed along the circumferential direction is formed on the outer peripheral wall of the valve rod (282). An air outlet channel (2822) communicating with the waist-shaped notch (2821) is formed at one end of the valve rod (282). An air inlet pipe (2811) is fixedly connected to the outer peripheral wall of the valve sleeve (281), and an air outlet pipe (2812) opposite to the air outlet channel (2822) is provided at one end thereof. The air inlet pipe (2811) is communicated with the air outlet of the air compressor (27). The air outlet pipe (2812) is communicated with the pipeline connected to the other ventilation pipe (213) of the air box (21) at one end of the spiral refrigerating air duct (23). The control motor (283) is fixedly arranged at the other end of the valve sleeve (281), and its output shaft is fixedly connected to the other end of the valve rod (282).

5. The integrated measurement and control device according to claim 4, characterized in that the PLC controller (24) is electrically connected to the humidity sensor (25), the temperature sensor (26), and the control motor (283).

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