Outdoor electric energy metering box with temperature control and dehumidification functions

Abstract

This invention discloses an outdoor energy metering box with temperature control and dehumidification functions, including an assembly box containing a separately arranged installation cavity and a functional cavity. The installation cavity houses a pressurization component, a dehumidifier, a heater, and a mode control component. The mode control component automatically adjusts the functional cavity for external or internal circulation based on the operating speed of the pressurization component: in external circulation mode, outside air is sequentially pressurized, dehumidified, and heated before being sent into the functional cavity and discharged, achieving rapid dehumidification and temperature control; in internal circulation mode, the air in the functional cavity is pressurized, heated, and then recirculated, achieving heat preservation. The mode control component employs a centrifugal transmission mechanism linked with multiple control valves to achieve adaptive air path switching, and the switching threshold can be adjusted via a control panel. This invention effectively solves the problems of condensation and temperature imbalance in outdoor metering boxes, and features a compact structure, high reliability, and significant energy consumption optimization.

Description

Technical Field

[0001] This invention relates to the field of electricity metering box technology, specifically an outdoor electricity metering box with temperature control and dehumidification functions. Background Technology

[0002] Outdoor power metering boxes are key infrastructure in power systems used to install metering equipment such as power meters and transformers. They are widely used in residential areas, industrial parks, agricultural irrigation and drainage, and outdoor power distribution sites. Because these metering boxes are exposed to the outdoor environment for a long time, their internal working environment is significantly affected by external climate conditions. Especially in humid and rainy areas with large temperature differences, problems such as condensation, moisture accumulation, and abnormal temperature can easily occur inside the box.

[0003] In existing technologies, outdoor electricity metering boxes typically rely solely on simple natural ventilation or static sealing structures to cope with changes in environmental humidity and temperature. However, natural ventilation can actually introduce external moisture in humid environments, exacerbating internal condensation. While static sealing structures can isolate moisture in the short term, a "breathing effect" can still occur when there are pressure differences between the inside and outside of the box due to diurnal temperature variations or seasonal changes, allowing moisture to gradually seep into the box. Long-term accumulation of moisture can lead to decreased insulation performance of electricity metering equipment, corrosion of metal components, poor contact of connectors, and even short circuits or metering errors, seriously affecting the safe operation of the power system and the fairness of billing.

[0004] To address these issues, some existing technologies attempt to add heaters or dehumidifiers to the metering chamber. For example, heaters can be used to raise the internal temperature to prevent condensation, or fixed dehumidification modules can be used to absorb moisture. However, these solutions mostly employ open-loop control, lacking the ability to dynamically respond to the internal and external environmental conditions. In traditional solutions, dehumidification, heating, and ventilation modules are set up independently, lacking a systematic and coordinated control mechanism, making it difficult to achieve a balance between energy saving and efficient dehumidification and temperature control. Summary of the Invention

[0005] In view of the above-mentioned shortcomings in the existing technology, the purpose of this invention is to provide an outdoor power metering box with temperature control and dehumidification function, which can automatically switch between internal and external circulation modes according to the actual operating status, so as to ensure the long-term stable operation of the power metering equipment and reduce the operation and maintenance costs.

[0006] The technical solution adopted by the present invention to achieve the above objectives is: an outdoor power metering box with temperature control and dehumidification function, including an assembly box, wherein the assembly box is provided with an installation cavity and a functional cavity that are kept in a separate arrangement, and the functional cavity is used to assemble power metering related equipment.

[0007] It also includes a pressurizing component, a dehumidifier, a heater, and a mode control component assembled into the mounting cavity. The pressurizing component, dehumidifier, and heater are used to pressurize, dehumidify, and heat the air input therein, respectively. The pressurizing component and the mode control component are kept in a power connection.

[0008] The mode control component adjusts the functional cavity to external circulation mode and internal circulation mode according to the operating speed of the pressurizing component. In external circulation mode, air is input from the outside and passes through the pressurizing component, dehumidifier, heater and functional cavity in sequence before being discharged back into the outside environment. In internal circulation mode, air is output from the functional cavity and passes through the pressurizing component and heater in sequence before being input back into the functional cavity.

[0009] Based on the above technical solutions, to facilitate the stable installation of the pressurizing components, dehumidifier, heater, mode control components, and electricity metering equipment in the mounting cavity and functional cavity of the assembly box, and to facilitate a direct understanding of the data detected by the electricity metering equipment, the following technical solutions are provided: The front side of the assembly box is hinged with doors A and B, which are used to seal the installation cavity and the functional cavity, respectively. Both doors A and B are equipped with handles and locks. Door B has evenly arranged observation ports.

[0010] Based on the above technical solutions, in order to ensure that the external circulation mode and the internal circulation mode can effectively act on the functional cavity, the following technical solutions are provided: The side wall of the assembly box has an air inlet that communicates with the mounting cavity. A dust cover is fitted on the air inlet. The side wall of the assembly box has an external circulation outlet that communicates with the functional cavity. A one-way check valve is fitted in the external circulation outlet. The inner wall of the assembly box has an external circulation inlet, an internal circulation inlet, and an internal circulation outlet for connecting the mounting cavity and the functional cavity. The external circulation inlet and the internal circulation inlet are located at the bottom of the functional cavity, and the internal circulation outlet and the external circulation outlet are located at the top of the functional cavity.

[0011] Based on the above technical solutions, in order to ensure that the pressurizing component can be stably assembled in the mounting cavity and to effectively pressurize the air input into it, the following technical solution is provided: The pressurization assembly includes a pressurization housing, a pressurization turbine, and a drive motor. The pressurization housing has an annular air supply passage and a pressurization chamber that is connected to the annular air supply passage. The pressurization turbine is rotatably mounted to the axis of the pressurization chamber. A pressurization inlet is connected to the annular air supply passage, and a pressurization outlet is connected to the axis of the pressurization chamber. The drive motor is poweredly connected to the pressurization turbine.

[0012] Based on the above technical solutions, in order to ensure that the mode control component can effectively connect with the pressurization component and automatically adjust the external circulation mode and internal circulation mode according to the operating speed of the pressurization component, the following technical solution is provided: The mode control component includes a mounting housing and a centrifugal transmission mechanism assembled in the mounting housing. The mounting housing is fixedly connected to the top of the pressurizing housing. The centrifugal transmission mechanism includes a rotating housing, a counterweight, an adjusting seat, a support spring A, an adjusting disc, and a self-locking assembly. The rotating housing is rotatably mounted in the mounting housing. The pressurizing turbine and the rotating housing are fixedly combined via a coaxial connecting shaft. A transmission bevel gear is fixedly connected to the rotating housing. A drive bevel gear that meshes with the transmission bevel gear is fixedly connected to the output shaft of the drive motor.

[0013] The rotating housing has multiple sets of inner radial through slots and outer radial through slots arranged in a ring array. Each set of inner radial through slots has a counterweight seat slidably installed in it, and each set of outer radial through slots has an adjusting seat slidably installed in it. The supporting spring A is assembled between the counterweight seat and the adjusting seat arranged in the same radial direction. The adjusting plate is rotatably installed in the rotating housing and is used to synchronously adjust the position of each set of adjusting seats in the radial through slots. The self-locking component is used to lock the adjusting plate to the rotating housing.

[0014] Based on the above technical solution, in order to ensure that the adjusting plate can synchronously adjust the position and attitude of each group of adjusting seats by means of the self-locking component to adjust the spring tension, and that after the adjustment is completed, it can rotate synchronously with the rotating housing by means of the self-locking component to avoid affecting the position and attitude of the adjusting seats, the following technical solution is provided: The adjusting plate has multiple sets of arc-shaped guide grooves arranged in a ring array. The bottom of each adjusting seat is fixedly connected to a guide pin that slides with the arc-shaped guide groove. A connecting seat is fixedly connected to the center of the adjusting plate.

[0015] The self-locking assembly includes an operating shaft, a guide shaft, a spline seat, a support spring B, and end face gears A and B arranged opposite to each other. The operating shaft, guide shaft, spline seat, and end face gear A are coaxially fixed. The guide shaft is nested into the axis of the rotating housing. The spline seat is slidably inserted into the connecting seat. The support spring B is arranged around the guide shaft and its two ends abut against the rotating housing and the spline seat, respectively. The end face gear B is fixedly installed on the rotating housing and meshes with the end face gear A. The operating shaft is located at the axis of the connecting shaft and passes through the axis of the end face gear B.

[0016] Based on the above technical solutions, in order to ensure that the counterweight seat operating synchronously under centrifugal force can automatically adjust between external circulation mode and internal circulation mode, the following technical solution is provided: The mode control component also includes an axial transmission mechanism and multiple sets of control valve bodies arranged around the axial transmission mechanism. The counterweight is connected to the axial transmission mechanism. The axial transmission mechanism includes a mounting sleeve, a telescopic shaft, and a sliding sleeve. The mounting sleeve is fixedly installed at the top axis of the mounting housing. The telescopic shaft is slidably installed in the mounting sleeve. A rotating sleeve arranged outside the mounting sleeve is rotatably installed at the bottom end of the telescopic shaft. Each set of counterweights is hinged to the rotating sleeve via a connecting rod. The sliding sleeve is slidably installed in the mounting sleeve and arranged around the telescopic shaft. Each set of control valve bodies is linked to the sliding sleeve. A support spring C is fitted in the mounting sleeve and abuts against the sliding sleeve. A pressure seat is fixedly connected to the top end of the telescopic shaft.

[0017] Based on the above technical solutions, in order to ensure that the control valve body can be stably assembled in the mounting housing, and to ensure that the sliding sleeve moving up and down on the mounting sleeve can control the attitude of each group of control valve bodies, the following technical solutions are provided: The control valve body includes four groups evenly distributed around the periphery of the axial transmission mechanism. Each group of control valve bodies includes a valve shell, a valve core, and a valve stem. The valve shell is fixedly installed in the mounting housing. The side wall of the valve shell is sequentially connected to an upper interface, a middle interface, and a lower interface from top to bottom. The valve core is slidably installed in the valve shell and is used to control the middle interface to connect to the upper interface or the lower interface independently. The valve stem is slidably inserted into the top of the valve shell and is coaxially fixedly connected to the valve core. A connecting frame is fixedly connected to the periphery of the sliding sleeve. The valve stem in each group of control valve bodies is fixedly connected to the connecting frame.

[0018] Based on the above technical solutions, in order to ensure that the pressurization component, dehumidifier, heater, and assembly box can be connected to the control valves in the mode control component and to achieve effective adjustment between the internal circulation mode and the external circulation mode, the following technical solutions are provided: The dehumidifier is equipped with a dehumidification inlet, a dehumidification outlet, and a drain pipe. The drain pipe is connected to the bottom outside of the assembly box. The heater is equipped with a heating inlet and a heating outlet. The upper, middle, and lower interfaces of the first group of control valve bodies are connected to the air inlet, pressurization inlet, and internal circulation outlet, respectively. The upper and middle interfaces of the second group of control valve bodies are connected to the dehumidification inlet and pressurization outlet, respectively. The upper and middle interfaces of the third group of control valve bodies are connected to the dehumidification outlet and heating inlet, respectively. The lower interface of the second group of control valve bodies is connected to the lower interface of the third group of control valve bodies. The upper, middle, and lower interfaces of the fourth group of control valve bodies are connected to the external circulation inlet, heating outlet, and internal circulation inlet, respectively.

[0019] The beneficial effects of this invention are: 1. By setting a mode control component and maintaining a power connection with the pressurization component, the system can automatically determine the internal environmental conditions based on the operating speed of the pressurization component: when the pressurization component operates at high speed, it switches to external circulation mode, quickly introducing outside air for dehumidification and heating, effectively replacing the high-humidity air inside the chamber and expelling condensation; when the pressurization component operates at low speed, it switches to internal circulation mode, allowing the air inside the chamber to circulate and be heated in a closed state, preventing the intrusion of external moisture and reducing energy consumption. This dynamic switching mechanism overcomes the shortcomings of traditional fixed-mode solutions that cannot adapt to environmental changes.

[0020] 2. The pressurization unit, dehumidifier, and heater are arranged sequentially in the installation cavity and connected according to either external or internal circulation paths. In external circulation mode, outside air is pressurized, dehumidified, and heated before being sent into the functional cavity, achieving simultaneous humidity control and temperature regulation. In internal circulation mode, the air inside the chamber is pressurized, heated, and then returned, achieving insulation in low-temperature environments. The coordinated operation of each functional module avoids the problem of ineffective dehumidification or heating methods.

[0021] 3. The mode control component employs a centrifugal transmission mechanism. The centrifugal force generated by the counterweight as the rotating housing rotates drives the axial transmission mechanism, which in turn links multiple control valves to complete the gas path switching. This mechanical automatic control structure requires no additional sensors or electronic control components, offers rapid response and high reliability, and is suitable for outdoor environments with stringent requirements for electromagnetic interference and long-term stability.

[0022] 4. A self-locking assembly consisting of an operating shaft, splined seat, and end face gear allows for manual adjustment of the adjusting disc angle, thereby changing the distance between the adjusting seat and the counterweight seat, and achieving precise adjustment of the preload of the support spring A. This design enables the speed switching thresholds of the pressurizing turbine (setting threshold A and threshold B) to be flexibly set according to actual climatic conditions or user needs, improving the product's adaptability to different regions and seasons.

[0023] 5. An air inlet and an external circulation outlet are provided on the side wall of the assembly box, each equipped with a dust cover and a one-way check valve. The external and internal circulation inlets are located at the bottom of the functional chamber, while the internal and external circulation outlets are located at the top, forming a rational "bottom-in, top-out" airflow organization. Combined with the layered interface connection of the four sets of control valves, this ensures the independence and orderliness of the airflow path in both internal and external circulation modes, avoiding energy waste from the recirculation of humid air or the direct discharge of processed dry air.

[0024] 6. In external circulation mode, air cooling can be achieved by turning off the heater, preventing the functional cavity from overheating in high-temperature environments; high-power heating allows for rapid evaporation and removal of condensation. In internal circulation mode, low-speed circulating heating keeps the internal temperature of the functional cavity at the optimal ambient temperature level, suitable for continuous heat preservation in low-temperature environments. Compared to traditional solutions, this invention can simultaneously cope with various harsh operating conditions such as high temperature and high humidity, low temperature and high humidity, and low temperature and dryness, significantly improving the service life and measurement accuracy of power metering equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 A schematic diagram of the structure of the combination of pressurization components, dehumidifier, heater, and mode control components; Figure 5 A schematic diagram of the combined structure of the pressurization component and the mode control component; Figure 6 A schematic diagram of the combined structure of various components in the mode control assembly; Figure 7 This is a schematic diagram of the internal structure of the centrifugal drive mechanism; Figure 8 This is a schematic diagram of the self-locking component. Figure 9 This is a schematic diagram of the axial transmission mechanism; Figure 10 This is a schematic diagram of the control valve body. Figure 11 This is a schematic diagram showing the structure of the pressurization assembly, dehumidifier, heater, and various control valve bodies.

[0026] In the diagram: 1 Assembly box, 11 Mounting cavity, 12 Functional cavity, 131 Door A, 132 Door B, 133 Handle, 134 Lock body, 135 Observation port, 136 Wiring through hole, 141 Air inlet, 142 External circulation outlet, 143 External circulation inlet, 144 Internal circulation inlet, 145 Internal circulation outlet, 146 Dust cover, 147 One-way check valve, 2 Pressurization assembly, 21 Pressurization housing, 211 Annular air supply passage, 212 Pressurization chamber, 213 Pressurization inlet, 214 Pressurization outlet, 22 Pressurization turbine, 221 Connecting shaft, 23 Drive motor, 231 Drive bevel gear, 3 Dehumidifier, 31 Dehumidification inlet, 32 Dehumidification outlet, 33 Drainage pipe, 4 Heater, 41 Heating inlet, 42 Heating outlet, 5 Mode control assembly, 51 Mounting housing, 52 Centrifugal transmission mechanism, 521 Rotor Moving housing, 5211 inner radial through groove, 5212 outer radial through groove, 5213 transmission bevel gear, 522 counterweight seat, 523 adjusting seat, 5231 guide rod, 5232 guide pin, 524 support spring A, 525 adjusting disc, 5251 arc-shaped guide groove, 5252 connecting seat, 5261 operating shaft, 5262 guide shaft, 5263 spline seat, 5264 support spring B, 5265 end face gear A, 5266 end face gear B, 53 axial transmission mechanism, 531 mounting sleeve, 532 telescopic shaft, 533 sliding sleeve, 534 rotating sleeve, 535 connecting rod, 536 support spring C, 537 pressure seat, 538 connecting frame, 54 control valve body, 541 valve shell, 5411 upper interface, 5412 middle interface, 5413 lower interface, 542 valve core, 543 valve stem. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0028] Please see Figures 1-3 An outdoor power metering box with temperature control and dehumidification functions includes an assembly box 1. The assembly box 1 is provided with an installation cavity 11 and a functional cavity 12 that are arranged separately. The functional cavity 12 is used to assemble power metering related equipment.

[0029] It also includes a pressurizing component 2, a dehumidifier 3, a heater 4, and a mode control component 5 assembled into the mounting cavity 11. The pressurizing component 2, the dehumidifier 3, and the heater 4 are used to pressurize, dehumidify, and heat the air input therein, respectively. The pressurizing component 2 and the mode control component 5 are connected by a power source.

[0030] The mode control component 5 adjusts the function chamber 12 to perform external circulation mode and internal circulation mode according to the operating speed of the pressurization component 2. In the external circulation mode, the air is input from the outside and passes through the pressurization component 2, dehumidifier 3, heater 4 and function chamber 12 in sequence before being discharged back into the outside environment. In the internal circulation mode, the air is output from the function chamber 12 and passes through the pressurization component 2 and heater 4 in sequence before being input back into the function chamber 12.

[0031] The assembly box 1 is installed as the main component on the outdoor load-bearing structure. The functional cavity 12 is used to install power metering equipment, such as power meters and transformers, to realize the function of detecting users' power consumption. The installation cavity 11 can ensure the stable assembly and operation of the pressurization component 2, dehumidifier 3, heater 4, and mode control component 5, thereby realizing the dehumidification and temperature control of the internal environment of the functional cavity 12 to ensure the stable operation of the power metering equipment installed therein.

[0032] When the pressurizing component 2 is operating at high speed, it can be switched to external circulation mode through the mode control component 5. At this time, the pressurizing component 2 performs efficient pressurization, drawing out a large amount of ambient air and passing it sequentially through the dehumidifier 3 and the heater 4. The dehumidifier 3 can remove the moisture contained in the ambient air to ensure that the air input to the functional cavity 12 remains dry. The air is then delivered to the functional cavity 12 through the heater 4, replacing the original ambient air in the functional cavity 12 with the outside environment. Water droplets condensed in the functional cavity 12 can also be evaporated by the continuously input dry air and discharged into the outside environment to keep the functional cavity 12 dry.

[0033] In external circulation mode, the air temperature input to the functional cavity 12 can be adjusted by controlling the operating power of heater 4. When the ambient temperature is high and the energy metering equipment generates heat during operation, the energy metering equipment needs to be cooled. Heater 4 can be turned off, and the input air will not be heated when it flows through heater 4. The functional cavity 12 and the installed energy metering equipment will be cooled quickly by air cooling.

[0034] In external circulation mode, by adjusting the heater 4 to a high power level, the air in the input functional cavity 12 can be heated quickly, thereby rapidly raising the ambient temperature of the functional cavity 12 to the optimal ambient temperature level. It can also rapidly evaporate and discharge the condensed water in the functional cavity 12.

[0035] When the pressurizing component 2 is operating at low speed, it can be switched to the internal circulation mode by the mode control component 5. At this time, the pressurizing component 2 operates at low power and thus the air in the functional cavity 12 operates at low speed in the internal circulation mode. In this mode, the functional cavity 12 is isolated from the external environment, and its internal humidity is less affected by the external environment and is usually maintained at a low level for a long time. At this time, the air inside the functional cavity 12, which is circulating at low speed, does not need to continue to be dehumidified by the dehumidifier 3, but is directly heated by the heater 4 so that the internal temperature of the functional cavity 12 is maintained at the optimal ambient temperature level, which is suitable for continuous heat preservation in the low temperature environment. Example 2

[0036] Please see Figures 1-4 To facilitate the stable installation of the pressurizing component 2, dehumidifier 3, heater 4, mode control component 5, and power metering equipment in the mounting cavity 11 and functional cavity 12 of the assembly box 1, and to facilitate a direct understanding of the data detected by the power metering equipment, the following technical solution is provided: The front side of the assembly box 1 is hinged with a door A131 and a door B132 for sealing the mounting cavity 11 and the functional cavity 12 respectively. Both door A131 and door B132 are equipped with a handle 133 and a lock body 134. Door B132 is provided with evenly arranged observation ports 135.

[0037] The front of the mounting cavity 11 and the functional cavity 12 are designed to be open, which can ensure that the pressurization component 2, dehumidifier 3, heater 4, mode control component 5 and power metering equipment are stably assembled and connected to pipelines and lines. They are sealed and blocked by the box door A131 and box door B132. The handle 133 is designed to facilitate the opening and closing of the box door A131 and box door B132. The box door A131 and box door B132 can be sealed and fixed to the assembly box 1 by the lock body 134.

[0038] The observation port 135 on the door B132 is equipped with a transparent sealing plate, such as transparent glass or acrylic plate, to ensure that the functional cavity 12 is isolated from the external environment.

[0039] It should also be noted that a wiring through hole 136 can be opened on the rear side of the assembly box 1 to ensure that the cable can be extended into the mounting cavity 11 and the functional cavity 12 and connected to the electrical equipment or power metering equipment therein. The wiring through hole 136 needs to be sealed to ensure that it is isolated from the external environment.

[0040] The mounting cavity 11 is also equipped with a mounting bracket so that the pressurization component 2, dehumidifier 3, heater 4, and mode control component 5 can be stably assembled and operated on the mounting bracket.

[0041] To ensure that both the external circulation mode and the internal circulation mode can effectively act on the functional cavity 12, the following technical solution is provided: The side wall of the assembly box 1 is provided with an air inlet 141 that communicates with the mounting cavity 11. A dust cover 146 is installed on the air inlet 141. The side wall of the assembly box 1 is provided with an external circulation outlet 142 that communicates with the functional cavity 12. A one-way check valve 147 is installed in the external circulation outlet 142. The inner wall of the assembly box 1 is provided with an external circulation inlet 143, an internal circulation inlet 144 and an internal circulation outlet 145 for communicating between the mounting cavity 11 and the functional cavity 12. The external circulation inlet 143 and the internal circulation inlet 144 are located at the bottom of the functional cavity 12, and the internal circulation outlet 145 and the external circulation outlet 142 are located at the top of the functional cavity 12.

[0042] The air inlet 141 is designed to introduce ambient air into the mounting cavity 11 in external circulation mode and deliver it to the pressurization component 2 through the mode control component 5. After being processed by the pressurization component 2, dehumidifier 3, and heater 4 in sequence, the air is delivered to the functional cavity 12 through the external circulation inlet 143 and finally output back to the external environment through the external circulation outlet 142, so as to realize the effect of external circulation mode on the functional cavity 12. In order to avoid the air output from the external circulation outlet 142 from interfering with the air inlet 141, the two are set at the farthest position on the assembly box 1.

[0043] In the internal circulation mode, the internal circulation inlet 144 and the internal circulation outlet 145 are used. The air in the functional cavity 12 is delivered to the pressurization component 2 and the heater 4 through the internal circulation outlet 145. After being pressurized and heated, the air is delivered back to the functional cavity 12 through the internal circulation inlet 144. Example 3

[0044] Please see Figures 5-8 To ensure that the pressurizing component 2 can be stably assembled in the mounting cavity 11 and to effectively pressurize the air input into it, the following technical solution is provided: The pressurization assembly 2 includes a pressurization housing 21, a pressurization turbine 22, and a drive motor 23. The pressurization housing 21 is provided with an annular air supply passage 211 and a pressurization chamber 212 that is connected to the annular air supply passage 211. The pressurization turbine 22 is rotatably mounted to the axis of the pressurization chamber 212. A pressurization inlet 213 is connected to the annular air supply passage 211, and a pressurization outlet 214 is connected to the axis of the pressurization chamber 212. The drive motor 23 is poweredly connected to the pressurization turbine 22.

[0045] The pressurized housing 21 is fixedly installed in the mounting cavity 11 to provide a mounting carrier for the pressurized turbine 22 and to constrain the pressurized air. The pressurized air is delivered to the annular air supply passage 211 through the pressurized inlet 213 and evenly distributed to the top outer edge of the pressurized cavity 212.

[0046] When the drive motor 23 drives the pressurizing turbine 22 to operate, it can effectively pressurize the air delivered from the annular air supply passage 211 to the pressurizing chamber 212, and finally deliver it out through the pressurizing outlet 214 arranged at the bottom axis of the pressurizing chamber 212.

[0047] To ensure that the mode control component 5 can be effectively connected to the pressurization component 2, and to automatically adjust the external circulation mode and internal circulation mode according to the operating speed of the pressurization component 2, the following technical solution is provided: The mode control component 5 includes a mounting housing 51 and a centrifugal transmission mechanism 52 assembled in the mounting housing 51. The mounting housing 51 is fixed to the top of the pressurizing housing 21. The centrifugal transmission mechanism 52 includes a rotating housing 521, a counterweight seat 522, an adjusting seat 523, a support spring A 524, an adjusting disc 525, and a self-locking component. The rotating housing 521 is rotatably mounted in the mounting housing 51. The pressurizing turbine 22 and the rotating housing 521 are fixedly combined through a coaxially arranged connecting shaft 221. A transmission bevel gear 5213 is fixedly connected to the rotating housing 521. A drive bevel gear 231 that is meshed with the transmission bevel gear 5213 is fixedly connected to the output shaft of the drive motor 23.

[0048] The rotating housing 521 has multiple sets of inner radial through grooves 5211 and outer radial through grooves 5212 arranged in a ring array. Each set of inner radial through grooves 5211 has a counterweight seat 522 slidably installed in it, and each set of outer radial through grooves 5212 has an adjusting seat 523 slidably installed in it. A support spring A524 is assembled between the counterweight seat 522 and the adjusting seat 523 arranged in the same radial direction. The adjusting plate 525 is rotatably installed in the rotating housing 521 and is used to synchronously adjust the position of each set of adjusting seats 523 in the radial through grooves. The self-locking component is used to lock the adjusting plate 525 to the rotating housing 521.

[0049] The mounting housing 51 and the pressurizing housing 21 are set as a unified whole to ensure their structural strength. The drive motor 23 is arranged on the outside of the mounting housing 51 and is radially arranged. When the drive motor 23 is working, the combination of the drive bevel gear 231 and the transmission bevel gear 5213 can drive the rotating housing 521 and the pressurizing turbine 22 to always keep them running synchronously.

[0050] The mounting housing 51 provides a mounting carrier for the centrifugal transmission mechanism 52, ensuring that the rotating housing 521 rotates stably within it. The rotating housing 521 maintains a power connection with the pressurizing component 2, and when the pressurizing component 2 is running, it drives the counterweight seat 522 and the adjusting seat 523 mounted on it to rotate synchronously. The adjusting seat 523 is always stationary at a specific position in the outer radial through groove 5212 due to the restriction of the adjusting plate 525 and the self-locking component. The counterweight seat 522 moves outward along the inner radial through groove 5211 under the combined action of centrifugal force and the support spring A524. When the rotation speed of the rotating housing 521 increases to a specific level, the outward sliding counterweight seats 522 can trigger the adjustment action of the external circulation mode and the internal circulation mode, thereby realizing the automatic adjustment of the mode.

[0051] It should also be noted that a guide rod 5231 is fixedly installed on the adjusting seat 523, which is radially distributed along the rotating housing 521. The guide rod 5231 is slidably inserted into the counterweight seat 522 in the corresponding radial direction. The support spring A524 is sleeved on the periphery of the guide rod 5231, and its two ends are respectively in contact with the adjusting seat 523 and the counterweight seat 522. The setting of the guide rod 5231 can not only improve the stability of the adjusting seat 523 and the counterweight seat 522 sliding along their own radial direction, but also ensure the stability of the support spring A524 assembled between the counterweight seat 522 and the adjusting seat 523.

[0052] To ensure that the adjusting disc 525 can synchronously adjust the position and orientation of each adjusting seat 523 using the self-locking assembly to adjust the spring tension, and that after adjustment, it can rotate synchronously with the rotating housing 521 using the self-locking assembly to avoid affecting the position and orientation of the adjusting seat 523, the following technical solution is provided: The adjusting plate 525 has multiple sets of arc-shaped guide grooves 5251 arranged in a ring array. The bottom of each adjusting seat 523 is fixedly connected to a guide pin 5232 that maintains a sliding combination with the arc-shaped guide groove 5251. A connecting seat 5252 is fixedly connected to the axis of the adjusting plate 525.

[0053] The self-locking assembly includes an operating shaft 5261, a guide shaft 5262, a spline seat 5263, a support spring B5264, and end face gears A5265 and B5266 arranged opposite to each other. The operating shaft 5261, guide shaft 5262, spline seat 5263, and end face gear A5265 are coaxially fixed. The guide shaft 5262 is nested and inserted into the axis of the rotating housing 521. The spline seat 5263 is slidably inserted into the connecting seat 5252. The support spring B5264 is arranged around the guide shaft 5262 and its two ends are respectively in contact with the rotating housing 521 and the spline seat 5263. The end face gear B5266 is fixedly installed on the rotating housing 521 and is meshed with the end face gear A5265. The operating shaft 5261 is located at the axis of the connecting shaft 221 and passes through the axis of the end face gear B5266.

[0054] In its natural state, the support spring B5264 can push the operating shaft 5261, guide shaft 5262, spline seat 5263, and end gear A5265, which form a unified whole, to move outward. The guide shaft 5262 is designed to ensure that it always moves in a circumferential extension and retraction along the rotating housing 521, thereby keeping the end gear A5265 and end gear B5266 nested and locked, and then locking them on the rotating housing 521 which is fixedly connected to the end gear B5266. Since the spline seat 5263 and the connecting seat 5252 are slidably inserted, the adjusting disc 525 which is fixedly connected to the connecting seat 5252 can be locked on the rotating housing 521, so that the adjusting disc 525 always remains relatively stationary with respect to the rotating housing 521.

[0055] A hexagonal countersunk groove is fixed at the center of the operating shaft 5261. The shafts of the connecting shaft 221 and the pressurizing turbine 22 are hollow, so that a hexagonal wrench can be inserted into them and engaged with the hexagonal countersunk groove on the operating shaft 5261 to press the operating shaft 5261 inward, thereby separating the end face gear A5265 and the end face gear B5266 and canceling the locking effect. This allows the operating shaft 5261 to rotate, which in turn drives the connecting shaft 221 and the adjusting plate 525 to rotate independently relative to the rotating housing 521 via the spline seat 5263. At this time, the arc-shaped guide groove 5251 and the outer radial through groove 5212 are engaged to realize the synchronous adjustment of the position and posture of each set of adjusting seats 523.

[0056] When the adjusting seat 523 moves away from the counterweight seat 522, the distance between them increases, causing the support spring A524 to relax. This allows the centrifugal force generated when the counterweight seat 522 rotates with the rotating housing 521 to more easily overcome the resistance of the support spring A524, thus enabling the rotating housing 521 to drive the counterweight seat 522 to slide radially at a lower speed. When the adjusting seat 523 moves closer to the counterweight seat 522, the distance between them decreases, causing the support spring to tighten. In this case, the counterweight seat 522 needs a greater centrifugal force to overcome the resistance of the support spring A524 and slide radially. This method allows adjustment of the rotational speed parameter of the rotating housing 521, triggering the adjustment of the internal and external circulation modes. Example 4

[0057] Please see Figure 5 , Figure 6 , Figure 9 , Figure 10 To ensure that the counterweight 522, which operates synchronously under centrifugal force, can automatically adjust between external and internal circulation modes, the following technical solution is provided: The mode control component 5 also includes an axial transmission mechanism 53 and multiple sets of control valve bodies 54 arranged around the axial transmission mechanism 53. The counterweight seat 522 is connected to the axial transmission mechanism 53. The axial transmission mechanism 53 includes a mounting sleeve 531, a telescopic shaft 532, and a sliding sleeve 533. The mounting sleeve 531 is fixedly installed at the top axis of the mounting housing 51. The telescopic shaft 532 is slidably installed in the mounting sleeve 531. A rotating sleeve 534 arranged outside the mounting sleeve 531 is rotatably installed at the bottom end of the telescopic shaft 532. Each set of counterweight seats 522 is hinged to the rotating sleeve 534 through a connecting rod 535. The sliding sleeve 533 is slidably installed in the mounting sleeve 531 and arranged around the telescopic shaft 532. Each set of control valve bodies 54 is linked with the sliding sleeve 533. A support spring C536 is fitted in the mounting sleeve 531 and abuts against the sliding sleeve 533. A pressure seat 537 is fixedly connected to the top end of the telescopic shaft 532.

[0058] When the rotational speed of the rotating housing 521 increases and the counterweight 522 is driven to move outward along the inner radial through groove 5211 under the action of centrifugal force, the telescopic shaft 532 can be driven to move downward through the connecting rod 535. During the rotation of the counterweight 522, the rotating sleeve 534 can be driven to rotate synchronously, and the telescopic shaft 532 and the rotating sleeve 534 maintain a rotational connection. Therefore, the rotation of the counterweight 522 will not be transmitted to the telescopic shaft 532.

[0059] In the initial stage of the downward movement of the telescopic shaft 532, the pressure seat 537 at its top does not contact the sliding sleeve 533, and the sliding sleeve 533 is always at the top of its stroke under the action of the support spring C536. When the rotational speed of the rotating housing 521, which rotates synchronously with the pressurizing turbine 22, exceeds the set threshold A, the centrifugal force on the counterweight 522 increases, which causes the telescopic shaft 532 to move downward until the pressure seat 537 and the sliding sleeve 533 are in contact. When the rotational speed of the rotating housing 521, which rotates synchronously with the pressurizing turbine 22, further exceeds the set threshold B, the force on the counterweight 522 further increases, which enables the pressure seat 537 to push the sliding sleeve 533 to overcome the resistance of the support spring C536 and move to the bottom of its stroke, so as to adjust the on / off state of each control valve body 54, and thus adjust the internal circulation mode to the external circulation mode.

[0060] Based on the above description, when the rotational speed of the pressurizing turbine 22 is less than the set threshold A, it is insufficient to trigger the operation of the sliding sleeve 533. At this time, it is in the internal circulation mode, and the pressurizing turbine 22 drives the air in the functional chamber 12 to circulate internally at a low speed. When the rotational speed of the pressurizing turbine 22 is between the set threshold A and the threshold B, it is in the transition range between the internal circulation and external circulation modes. When the rotational speed of the pressurizing turbine 22 is greater than the set threshold B, it is in the external circulation mode, and the pressurizing turbine 22 drives the ambient air into the functional chamber 12 at a high speed.

[0061] To ensure that the control valve body 54 can be stably assembled in the mounting housing 51, and to ensure that the sliding sleeve 533, which moves up and down on the mounting sleeve 531, can control the attitude of each group of control valve bodies 54, the following technical solution is provided: The control valve body 54 includes four groups evenly distributed around the axial transmission mechanism 53. Each group of control valve bodies 54 includes a valve shell 541, a valve core 542, and a valve stem 543. The valve shell 541 is fixedly installed in the mounting housing 51. The side wall of the valve shell 541 is sequentially connected from top to bottom to an upper interface 5411, a middle interface 5412, and a lower interface 5413. The valve core 542 is slidably installed in the valve shell 541 and is used to control the middle interface 5412 to connect to the upper interface 5411 or the lower interface 5413 independently. The valve stem 543 is slidably inserted into the top of the valve shell 541 and is coaxially fixedly connected to the valve core 542. A connecting frame 538 is fixedly connected to the periphery of the sliding sleeve 533. The valve stem 543 in each group of control valve bodies 54 is fixedly connected to the connecting frame 538.

[0062] For the control valve body 54, when the valve core 542 is at the top of its stroke, it is located between the upper interface 5411 and the middle interface 5412, which enables the middle interface 5412 to connect with the lower interface 5413. When the valve core 542 is driven to the bottom of its stroke by the sliding sleeve 533, the connecting bracket 538, and the valve stem 543, it is located between the middle interface 5412 and the lower interface 5413, which enables the middle interface 5412 to connect with the upper interface 5411. Example 5

[0063] Please see Figure 4 , Figure 11 To ensure that the pressurization component 2, dehumidifier 3, heater 4, and assembly box 1 can be connected to the control valve bodies 54 in the mode control component 5, and to achieve effective adjustment between the internal circulation mode and the external circulation mode, the following technical solution is provided: The dehumidifier 3 is equipped with a dehumidification inlet 31, a dehumidification outlet 32, and a drain pipe 33. The drain pipe 33 is connected to the bottom outside of the assembly box 1. The heater 4 is equipped with a heating inlet 41 and a heating outlet 42. The upper interface 5411, middle interface 5412, and lower interface 5413 of the first set of control valve bodies 54 are respectively connected to the air inlet 141, the pressurization inlet 213, and the internal circulation outlet 145. The upper interface 5411 and middle interface 5412 of the second set of control valve bodies 54 are respectively connected to the dehumidification inlet. 31. The pressurized outlet 214 is connected to the upper interface 5411 and the middle interface 5412 of the third group of control valve bodies 54, which are respectively connected to the dehumidification outlet 32 ​​and the heating inlet 41. The lower interface 5413 of the second group of control valve bodies 54 is connected to the lower interface 5413 of the third group of control valve bodies 54. The upper interface 5411, the middle interface 5412, and the lower interface 5413 of the fourth group of control valve bodies 54 are respectively connected to the external circulation inlet 143, the heating outlet 42, and the internal circulation inlet 144.

[0064] In external circulation mode, the pressurization component 2 operates at high speed and drives the upper interface 5411 and the middle interface 5412 of each group of control valve bodies 54 to remain connected through the axial transmission mechanism 53, while the middle interface 5412 and the lower interface 5413 are disconnected.

[0065] At this time, outside air enters the first group of control valve bodies 54 through the air inlet 141, and is delivered to the pressurization component 2 through the connection of the middle interface 5412 and the pressurization inlet 213. After being pressurized by the pressurization component 2, it enters the second group of control valve bodies 54 through the pressurization outlet 214, and enters the dehumidifier 3 through the connection of its upper interface 5411 and the dehumidification inlet 31. After being dehumidified by the dehumidifier 3, it is delivered to the third group of control valve bodies 54 through the dehumidification outlet 32, and enters the heater 4 through the connection of its middle interface 5412 and the heating inlet 41. After being heated by the heater 4, it enters the fourth group of control valve bodies 54 through the heating outlet 42, and enters the functional chamber 12 through the connection of its upper interface 5411 and the external circulation inlet 143. At this time, due to the large pressure in the functional chamber 12, it can push the one-way check valve 147 to open, and achieve external discharge through the external circulation outlet 142.

[0066] In the internal circulation mode, the pressurization component 2 operates at low speed and cannot trigger the axial transmission mechanism 53 to operate. At this time, under the action of the support spring C536 and the sliding sleeve 533, each group of control valve bodies 54 keeps the middle interface 5412 and the lower interface 5413 connected, while the upper interface 5411 and the middle interface 5412 are disconnected.

[0067] At this time, the air in the functional chamber 12 can enter the first group of control valve bodies 54 through the internal circulation outlet 145, and enter the pressurization component 2 through the connection of the middle interface 5412 and the pressurization inlet 213. The pressurized air in the pressurization component 2 is delivered to the second group of control valve bodies 54 through the pressurization outlet 214, and then to the third group of control valve bodies 54 through its lower interface 5413. The air is delivered to the heater 4 through the connection of the middle interface 5412 and the heating inlet 41. After being heated by the heater 4, the air is delivered to the fourth control valve body 54 through the heating outlet 42. Then, the treated air is reintroduced into the functional chamber 12 through the connection of its upper and lower interfaces 5413 and the internal circulation inlet 144.

[0068] In the internal circulation mode, the air circulates internally in the functional chamber 12 under the action of the pressurization component 2. After the functional chamber 12 initially maintains the same air pressure as the external environment, the one-way check valve 147 remains closed throughout the entire internal circulation mode, so there will be no problem of air leakage.

[0069] It should also be noted that the dehumidifier 3 can remove moisture from the air by condensation dehumidification. It uses semiconductor refrigeration to condense water vapor in the air into water at the cold end, and finally discharges it through the drain pipe 33.

[0070] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0071] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An outdoor power metering box with temperature control and dehumidification functions, characterized in that: It includes an assembly box (1), which is provided with an installation cavity (11) and a functional cavity (12) that are arranged separately. The functional cavity (12) is used to assemble power metering related equipment. It also includes a pressurizing assembly (2), a dehumidifier (3), a heater (4) and a mode control assembly (5) assembled into the mounting cavity (11). The pressurizing assembly (2), the dehumidifier (3) and the heater (4) are used to pressurize, dehumidify and heat the air input therein, respectively. The pressurizing assembly (2) and the mode control assembly (5) are connected by a power source. The mode control component (5) adjusts the function chamber (12) to perform external circulation mode and internal circulation mode according to the operating speed of the pressurization component (2). In the external circulation mode, the air is input from the outside and passes through the pressurization component (2), dehumidifier (3), heater (4), and function chamber (12) in sequence before being discharged back into the outside environment. In the internal circulation mode, the air is output from the function chamber (12) and passes through the pressurization component (2) and heater (4) in sequence before being input back into the function chamber (12).

2. An outdoor power metering box with temperature control and dehumidification function according to claim 1, characterized in that: The front side of the assembly box (1) is hinged with a door A (131) and a door B (132) for sealing the installation cavity (11) and the functional cavity (12), respectively. Both the door A (131) and the door B (132) are equipped with handles (133) and lock bodies (134). The door B (132) is provided with evenly arranged observation ports (135).

3. An outdoor power metering box with temperature control and dehumidification function according to claim 1, characterized in that: The side wall of the assembly box (1) is provided with an air inlet (141) that communicates with the mounting cavity (11). A dust cover (146) is installed on the air inlet (141). The side wall of the assembly box (1) is provided with an external circulation outlet (142) that communicates with the functional cavity (12). A one-way check valve (147) is installed in the external circulation outlet (142). The inner wall of the assembly box (1) is provided with an external circulation inlet (143), an internal circulation inlet (144), and an internal circulation outlet (145) for communicating with the mounting cavity (11) and the functional cavity (12). The external circulation inlet (143) and the internal circulation inlet (144) are located at the bottom of the functional cavity (12), and the internal circulation outlet (145) and the external circulation outlet (142) are located at the top of the functional cavity (12).

4. An outdoor power metering box with temperature control and dehumidification function according to claim 3, characterized in that: The pressurization assembly (2) includes a pressurization housing (21), a pressurization turbine (22), and a drive motor (23). The pressurization housing (21) is provided with an annular air supply passage (211) and a pressurization chamber (212) that is connected to the annular air supply passage (211). The pressurization turbine (22) is rotatably mounted to the axis of the pressurization chamber (212). A pressurization inlet (213) is connected to the annular air supply passage (211), and a pressurization outlet (214) is connected to the axis of the pressurization chamber (212). The drive motor (23) is poweredly connected to the pressurization turbine (22).

5. An outdoor power metering box with temperature control and dehumidification function according to claim 4, characterized in that: The mode control component (5) includes a mounting housing (51) and a centrifugal transmission mechanism (52) assembled in the mounting housing (51). The mounting housing (51) is fixed to the top of the pressurizing housing (21). The centrifugal transmission mechanism (52) includes a rotating housing (521), a counterweight seat (522), an adjusting seat (523), a support spring A (524), an adjusting disc (525), and a self-locking component. The rotating housing (521) is rotatably mounted in the mounting housing (51). The pressurizing turbine (22) and the rotating housing (521) are fixedly combined through a coaxially arranged connecting shaft (221). A transmission bevel gear (5213) is fixedly connected to the rotating housing (521). A drive bevel gear (231) that is meshed with the transmission bevel gear (5213) is fixedly connected to the output shaft of the drive motor (23). The rotating housing (521) has multiple sets of inner radial through grooves (5211) and outer radial through grooves (5212) arranged in a ring array. The counterweight (522) is slidably installed in each set of inner radial through grooves (5211), and the adjusting seat (523) is slidably installed in each set of outer radial through grooves (5212). The supporting spring A (524) is assembled between the counterweight (522) and the adjusting seat (523) arranged in the same radial direction. The adjusting plate (525) is rotatably installed in the rotating housing (521) and is used to synchronously adjust the position of each set of adjusting seats (523) in the radial through grooves. The self-locking component is used to lock the adjusting plate (525) onto the rotating housing (521).

6. An outdoor power metering box with temperature control and dehumidification function according to claim 5, characterized in that: The adjusting plate (525) has multiple sets of arc-shaped guide grooves (5251) arranged in a ring array. The bottom of each set of adjusting seats (523) is fixedly connected to a guide pin (5232) that maintains a sliding combination with the arc-shaped guide groove (5251). A connecting seat (5252) is fixedly connected to the axis of the adjusting plate (525). The self-locking assembly includes an operating shaft (5261), a guide shaft (5262), a spline seat (5263), a support spring B (5264), and end face gears A (5265) and B (5266) arranged opposite to each other. The operating shaft (5261), guide shaft (5262), spline seat (5263), and end face gear A (5265) are coaxially fixed. The guide shaft (5262) ​​is nested into the axis of the rotating housing (521). The spline seat (5263) and the... The connecting seat (5252) is slidably inserted. The supporting spring B (5264) is arranged around the guide shaft (5262) ​​and its two ends are respectively in contact with the rotating housing (521) and the spline seat (5263). The end face gear B (5266) is fixedly installed on the rotating housing (521) and is meshed with the end face gear A (5265). The operating shaft (5261) is located at the axis of the connecting shaft (221) and passes through the axis of the end face gear B (5266).

7. An outdoor power metering box with temperature control and dehumidification function according to claim 6, characterized in that: The mode control component (5) further includes an axial transmission mechanism (53) and multiple sets of control valve bodies (54) arranged around the axial transmission mechanism (53). The counterweight (522) maintains a transmission connection with the axial transmission mechanism (53). The axial transmission mechanism (53) includes a mounting sleeve (531), a telescopic shaft (532), and a sliding sleeve (533). The mounting sleeve (531) is fixedly installed at the top axis of the mounting housing (51). The telescopic shaft (532) is slidably installed in the mounting sleeve (531). A cloth is rotatably installed at the bottom end of the telescopic shaft (532). The rotating sleeve (534) is placed outside the mounting sleeve (531). Each set of counterweight seats (522) is hinged to the rotating sleeve (534) through the connecting rod (535). The sliding sleeve (533) is slidably installed in the mounting sleeve (531) and arranged around the telescopic shaft (532). Each set of control valve bodies (54) is linked with the sliding sleeve (533). The mounting sleeve (531) is equipped with a support spring C (536) that abuts against the sliding sleeve (533). The top end of the telescopic shaft (532) is fixed with a pressure seat (537).

8. An outdoor power metering box with temperature control and dehumidification function according to claim 7, characterized in that: The control valve body (54) includes four groups evenly distributed around the axial transmission mechanism (53). Each group of control valve bodies (54) includes a valve shell (541), a valve core (542), and a valve stem (543). The valve shell (541) is fixedly installed in the mounting housing (51). The side wall of the valve shell (541) is sequentially connected from top to bottom to an upper interface (5411), a middle interface (5412), and a lower interface (5413). The valve core (5412) is... 2) Slidingly installed into the valve housing (541) and used to control the middle layer interface (5412) to connect to the upper layer interface (5411) or the lower layer interface (5413) separately. The valve stem (543) is slidably inserted into the top of the valve housing (541) and is coaxially fixed to the valve core (542). A connecting frame (538) is fixedly connected to the periphery of the sliding sleeve (533). The valve stem (543) in each group of control valve bodies (54) is fixedly connected to the connecting frame (538).

9. An outdoor power metering box with temperature control and dehumidification function according to claim 8, characterized in that: The dehumidifier (3) is provided with a dehumidification inlet (31), a dehumidification outlet (32), and a drain pipe (33). The drain pipe (33) is connected to the bottom outside of the assembly box (1). The heater (4) is provided with a heating inlet (41) and a heating outlet (42). The upper interface (5411), middle interface (5412), and lower interface (5413) of the first group of control valve bodies (54) are respectively connected to the air inlet (141), the pressurization inlet (213), and the internal circulation outlet (145). The upper interface (5411) and middle interface (5412) of the second group of control valve bodies (54) are respectively connected to the air inlet (141), the pressurization inlet (213), and the internal circulation outlet (145). The dehumidification inlet (31) and pressurization outlet (214) are connected. The upper interface (5411) and middle interface (5412) of the third group of control valve bodies (54) are connected to the dehumidification outlet (32) and heating inlet (41) respectively. The lower interface (5413) of the second group of control valve bodies (54) is connected to the lower interface (5413) of the third group of control valve bodies (54). The upper interface (5411), middle interface (5412), and lower interface (5413) of the fourth group of control valve bodies (54) are connected to the external circulation inlet (143), heating outlet (42), and internal circulation inlet (144) respectively.

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