52 results about "Active ventilation" patented technology

The invention discloses an inter-plant light supplement lamp intelligent control system based on PWM dimming and wireless networking, and relates to the technical field of plant light supplement illumination control, and during operation of the system, the system comprises a central management server, a wireless communication gateway, an environmental data acquisition unit, an intelligent ventilation light supplement terminal, a distributed power supply management unit and a mobile monitoring terminal. The server generates a PWM control instruction based on the environmental parameters and issues the PWM control instruction to the intelligent terminal through the wireless gateway; and the terminal adjusts the light intensity of the LED array by using the PWM driving unit, and synchronously controls the active ventilation device to improve the microenvironment between plants. Through deep integration of PWM dimming and wireless networking, gridding management and control of the greenhouse environment are realized, the photosynthetic efficiency of the middle and lower parts of plants is effectively improved, the gas diffusion rate is enhanced, the system wiring cost and energy efficiency loss are reduced, and precise agricultural production is realized.

An airbag unit is described. The airbag unit includes an airbag having an outer skin (50), an inflator for inflating the outer skin (50), and a structure including a receiving portion for the airbag, wherein an undeployed airbag is received in the receiving portion. For ventilation of the outer skin of the airbag, an active ventilation arrangement having a first state and an activated second state is further provided. The active ventilation arrangement includes: an opening (52) in the outer skin (50); a covering element (10) having an initial state in which, when the active ventilation arrangement is in its first state, the covering element covers the opening (52) in the outer skin; a tether element extending from a first end portion (40a) attached to the covering element (10) to a second end portion; and a fixing feature to which the second end portion of the tether element is attached. The fixing feature includes an active release arrangement that releases or destroys the tether element upon activation. When the outer skin (50) is fully extended and the second end portion of the tether element (40) is not released or broken, the tether element is under tension and holds the cover element (10) in its initial state, thus placing the active ventilation arrangement in its first state. To provide an active ventilation arrangement that has little or no leakage in the initial first state and provides strong ventilation in the activated second state, the following measures are taken: the cover element (10) is attached to the outer surface of the outer skin (50) by a connector (54) having a first portion (55) and a second portion (56). Furthermore, the free edge (11) of the cover element (10) extends between the two portions (55, 56) of the connector (54). Finally, the cover element (10) is folded along at least a first pair of fold lines such that the cover element in its initial state includes a first side portion (14), a main portion (12), and at least one first clamping portion sandwiched between the first side portion (14) and the main portion (12), wherein the first portion (55) of the connector (54) connects the first side portion (14) to the outer skin (50) (Fig. 16).

Turbomachine nacelle equipped with an active ventilation vent. A turbomachine nacelle includes a ventilation vent (200) comprising: - a first ring (210) defining a ventilation opening (211), - a plurality of blades (220) extending into the ventilation opening of the first ring, each blade (220) having a fixed section (221) and a pivoting section (222), - a second ring (230) movable for rotation, the first ring (210) being rotationally meshed with the second ring (230), - a drive motor for rotating the second ring (230). When the second ring (230) is rotated, the pivoting sections (222) of the blades of the plurality of blades (220) are oriented in a direction (D2) different from the direction (D1) of the fixed sections. Figure for the abbreviation: Fig. 3.

The entrance door with the ventilation structure comprises an outer door plate and an inner door plate, the outer door plate and the inner door plate are fixedly installed, after installation, a cavity is formed between the outer door plate and the inner door plate, a first ring body and a second ring body are arranged on the inner side of the outer door plate, and the first ring body and the second ring body are arranged on the inner side of the outer door plate. An annular air channel is formed between the first ring body and the second ring body, a plurality of air inlet holes are annularly distributed in the position, located on the inner side of the first ring body, of the plate face of the outer door plate, a stepped hole corresponding to the first ring body is formed in the plate face of the inner door plate, and an air inlet device covers the interior of the stepped hole. The air inlet device corresponds to the inner side of the second ring body, and ventilation holes are evenly distributed in the inner wall of the second ring body. The device can communicate indoor and outdoor for active ventilation.

The utility model belongs to the technical field of air purification, and particularly relates to an all-round type photocatalyst purifier which is characterized in that when the all-round type photocatalyst purifier is used, an active ventilation assembly exhausts air to the outside of a shell, so that a negative pressure environment is formed in the shell, outside air enters the shell and firstly passes through a first filtering assembly, and dust in the air is removed; then the air passes through the second filter assembly, the second filter assembly adsorbs part of harmful substances in the air, then the air passes through the air purification mechanism, the air purification mechanism catalyzes and oxidizes the harmful substances which are not adsorbed by the second filter assembly, and the air purified by the air purification mechanism is discharged out of the shell through the active ventilation assembly. Therefore, air purification is completed. According to the air purifier, harmful substances in the air can be filtered, adsorbed and decomposed, and the air is effectively purified.

The utility model discloses an active ventilation forest musk deer breeding house which comprises a wall body, an air inlet pipe is arranged at an air inlet in the lower side of the left end of the wall body, an exhaust pipe is arranged at an air inlet in the lower side of the right end of the wall body, and the active ventilation forest musk deer breeding house further comprises an air volume adjusting mechanism. The air volume adjusting mechanism comprises a sliding plate, a baffle, a spring and a telescopic rod, sliding grooves are formed in the front inner wall and the rear inner wall of the right side in the air inlet pipe correspondingly, the sliding plate is slidably connected between the two sliding grooves, the baffle is arranged at the right end of the air inlet pipe, and the right side face of the sliding plate is tightly connected with the left side face of the baffle. According to the active ventilation forest musk deer breeding house, when forest musk deer breeding is conducted, the ventilation quantity can be adjusted according to the air quality in the breeding house, the ventilation quantity can be adjusted according to the air quality in the breeding house, and the breeding efficiency is improved. And the air quality in the breeding house is effectively adjusted.

The invention relates to a ventilation profile for actively ventilating and / or extracting air from a building waterproofing system, wherein the building waterproofing system protects and / or seals a wall of a building, in particular a house, on an outer surface of the wall by means of a moisture-proof or moisture-resistant protective layer against penetrating moisture from surrounding soil, wherein the protective layer is arranged in a protective layer plane spaced from the wall by means of spacers between the wall and surrounding soil and thus a ventilation space is formed between the protective layer and the wall, wherein a connecting strip is arranged on an upper connecting line of the protective layer along a connecting axis and the protective layer is connected to the wall at an upper connecting line by means of the connecting strip, wherein the connecting strip has at least one fluid-carrying ventilation access to the ventilation space.Furthermore, the invention relates to a building seal with such a ventilation profile and a method for actively ventilating and / or de-ventilating a building seal in several steps.

The invention discloses an intelligent ventilation type latex mattress, and relates to the technical field of latex mattresses, the intelligent ventilation type latex mattress comprises a surface layer and a ventilation assembly, and is characterized in that the ventilation assembly is arranged on the front side of a mattress surrounding layer, the ventilation assembly comprises double centrifugal fans, a filter screen, an air inducing pipe, a butt joint pipe and an exhaust pipe, and external air can be introduced into the mattress after being filtered; meanwhile, an orientation adjusting structure and a moving structure are further arranged and can respectively drive the exhaust pipe to perform angle deflection and front-back reciprocating motion, so that the air supply direction and the coverage range are dynamically adjusted, and uniform and intelligent distribution of airflow in the mattress is realized; the problems that a traditional latex mattress is prone to heat accumulation and uneven in ventilation in a high-temperature environment are effectively solved, and sleeping comfort and health are improved.

The invention relates to an integrated ventilation and heat exchange system of a photovoltaic roof and a photovoltaic curtain wall and a design method, and belongs to the technical field of ventilation and heat exchange, the system is characterized in that an adjustable steel support is arranged in a photovoltaic roof area, an adjustable ventilation opening is formed in a photovoltaic curtain wall area, and a curtain wall cavity is formed between a photovoltaic curtain wall assembly and a wall body; wherein the adjustable steel bracket adjusts the thickness of the roof ventilation cavity according to the length and inclination angle of a photovoltaic array, and the adjustable ventilation opening optimizes the height of the ventilation opening according to the height and orientation of a curtain wall. When the system monitors that the temperature of the back face of the photovoltaic roof assembly or the back face of the photovoltaic curtain wall assembly or the indoor temperature is too high through a temperature sensor, active ventilation of a roof ventilation cavity and a curtain wall cavity is achieved by driving a cooling fan and adjusting the opening degree of a ventilation opening; the active ventilation can timely discharge the heat in the cavity, effectively reduces the temperature of the roof ventilation cavity and the curtain wall cavity, further reduces the working temperature of the photovoltaic module, finally prolongs the service life of the photovoltaic module, and improves the photoelectric conversion efficiency of the photovoltaic module.

The utility model discloses an active ventilation door and relates to the technical field of doors and windows. The active ventilation door comprises a door leaf, the door leaf is provided with a cavity, an air inlet channel and an air exhaust channel, the cavity penetrates through the two opposite sides of the door leaf in the thickness direction of the door leaf to form an opening structure, and the air inlet channel and the air exhaust channel both extend and penetrate through the door leaf in the thickness direction of the door leaf to form an air opening structure; the air inlet channel and the air exhaust channel are both provided with the fan assemblies; the two opposite sides of the air inlet channel and the two opposite sides of the air exhaust channel are each provided with the corresponding sealing plate assembly used for opening and closing the air opening structure. And the telescopic assembly is arranged in the cavity, the movable end of the telescopic assembly penetrates through the opening structure to be connected with the sealing plate assembly, and the telescopic assembly can drive the sealing plate assembly to linearly move in the thickness direction of the door leaf so as to control opening and closing of the air inlet channel or the air exhaust channel. According to the utility model, active ventilation can be realized, and excellent sound insulation, heat insulation and heat preservation functions and an indoor space privacy protection effect can be provided.

Recreational vehicle (100) comprising: - a window pane (2) that separates an interior area (IB) of the recreational vehicle (100) from an exterior area (AB) surrounding the recreational vehicle (100), - an image capture device (5) whose field of view is directed towards the window pane (100), and - an active ventilation device which generates an airflow during operation to counteract condensation in the field of view, wherein the image acquisition device (5) and the active ventilation device are arranged in a common assembly (10).

Turbomachine nacelle equipped with an active ventilation vent. A turbomachine nacelle includes a ventilation vent (200) comprising: - a first ring (210) defining a ventilation opening (211), - a plurality of blades (220) extending into the ventilation opening of the first ring, each blade (220) having a fixed section (221) and a pivoting section (222), - a second ring (230) movable for rotation, the first ring (210) being rotationally meshed with the second ring (230), - a drive motor for rotating the second ring (230). When the second ring (230) is rotated, the pivoting sections (222) of the blades of the plurality of blades (220) are oriented in a direction (D2) different from the direction (D1) of the fixed sections. Figure for the abbreviation: Fig. 3.

An energy storage unit capable of controlling a thermal runaway, comprising an enclosure for housing battery modules for energy storage, a movable panel configurable between a closed position and an open position, a controllable actuator, connected to the movable panel, for moving the movable panel from the closed position to the open position, at least one sensor capable of measuring environmental parameters of the interior of the enclosure and a control unit connected to the sensor and the controllable actuator, for automatically activating the actuator and moving the panel from the closed position to the open position when at least one of the measured environmental parameters is indicative of thermal runaway, so that heat and explosive gases generated by the thermal runaway can escape outside the enclosure. A method for controlling a thermal runaway phenomenon of an energy storage unit comprising battery modules is also described.

The utility model discloses an active ventilation type sofa structure, which comprises a sofa frame, a seat cushion and a back cushion, the seat cushion and the back cushion are arranged on the sofa frame, an installation space is arranged between the seat cushion and the back cushion, a ventilation module is arranged in the installation space, and the ventilation module is movably arranged relative to the sofa frame; the sofa frame is provided with a locking module for restraining the front-back movement of the ventilation module. And the arranged ventilation module can be connected with an external fan to blow or suck air to a user in the sofa so as to drive air to flow and take away heat. And the ventilation module is movably arranged, so that the position of the ventilation module can be adjusted according to the back cushions with different thicknesses, and different use requirements are met.

This invention discloses a method for calculating the equivalent annual average temperature of tunnels in cold regions considering non-uniform ventilation. It can calculate both the equivalent annual average temperature and the equivalent coldest month's average temperature considering non-uniform ventilation, providing a theoretical method for calculating these two indicators and improving the accurate characterization of coldness in tunnels. This method provides key calculation parameters for determining the thickness of insulation layers in cold-region tunnels considering non-uniform ventilation. Furthermore, the equivalent annual average temperature of tunnels in cold regions calculated using this method plays an important role in guiding the design of drainage and waterproofing systems and active ventilation control in cold-region tunnels, leading to more accurate and rational frost protection designs for these tunnels.

A support cushion assembly comprises a foundation and a support cushion that is positioned atop the foundation. The support cushion includes an upper surface and a bottom surface. The support cushion assembly further includes a ventilation system configured to pull air downwards from the upper surface of the support surface and to release the pulled air under the foundation.

The application discloses a low-carbon type full-buried sewage treatment system and an operation and maintenance method, and relates to the technical field of sewage treatment. The low-carbon type full-buried sewage treatment system comprises an underground space, an unmanned operation and maintenance module, an intelligent ventilation module, an intelligent lighting module and a personnel detection module; the intelligent ventilation module comprises an air inlet shaft, an air outlet shaft, a passive ventilation assembly and an active ventilation assembly; and the intelligent lighting module comprises a passive lighting assembly and an active lighting assembly. When the underground space is unoccupied, the unmanned operation and maintenance module is used to maintain the operation of the low-carbon type full-buried sewage treatment system, the passive ventilation assembly and the passive lighting assembly are used to ventilate and light the underground space, and the system has low energy consumption; when a user enters the underground space, the active ventilation assembly and the active lighting assembly are used to enhance ventilation intensity and lighting intensity, guarantee the life safety of the user and provide a good field of view, so that the user can conveniently perform underground operation.

The invention discloses an anti-pressure injury monitoring device and a use method, and belongs to the technical field of nursing surgery, the anti-pressure injury monitoring device comprises an air bag supporting layer, and the air bag supporting layer is used for bearing a human body; the pressure sensor layer is arranged above the air bag supporting layer and used for sensing multi-point pressure data of a human body and a contact surface in real time, the device has a monitoring protection mode and an active ventilation mode, and in the monitoring protection mode, when the control assembly judges that the risk level reaches a preset threshold value, an alarm mechanism is triggered; in the active ventilation mode, the control assembly intermittently relieves pressure of the multiple rows of air bag units, the corresponding area of the air path mechanism is driven, and directional air flow pointing to the body surface of the patient is generated. Local pressure is physically reduced through deflation of the air bag unit, and more innovatively, directional airflow is actively conveyed to the corresponding body surface through a designed air path while pressure reduction is conducted, the airflow can directly take away moisture and redundant heat on the skin surface, and the pressed local skin is effectively dried and cooled.

This invention provides an active ventilation and sand-proof structure for wind turbine generators, relating to the field of wind power generation technology. This active ventilation and sand-proof structure features an air inlet on the tower door, with a dust filter and fan installed at the inlet. The dust filter is located outside the fan, which drives external air through the filter before it enters the tower body. This achieves active ventilation inside the tower body, facilitating heat dissipation for related electrical equipment. Simultaneously, it creates positive pressure at the ventilation opening (the internal air pressure is greater than the external air pressure), ensuring that air inside the tower body can flow to the external environment. While achieving ventilation and heat dissipation, external air carrying sand and dust will not flow into the tower body through the ventilation opening. In other words, this active ventilation and sand-proof structure for wind turbine generators simultaneously addresses both tower ventilation and sand protection.

The present application relates to the technical field of medical devices, and discloses a head-pelvis ring traction and turning-over pillow device, which comprises a first base and a second base, a connecting module is arranged between the first base and the second base, an inner side of the first base is provided with a back supporting module, the back supporting module comprises a first sliding rail fixedly connected to the inner side of the first base, both ends of the first sliding rail are slidably connected with a first movable seat, the top of each of the two first movable seats is fixedly connected with a first extension pad, a middle part of the first base is provided with an adjusting piece for driving the two first movable seats to slide towards or away from each other, a back supporting piece is arranged between the two first movable seats, and a lateral supporting piece is movably connected to the outer side of each of the two first movable seats; an inner side of the second base is provided with a hip supporting module. The adjustable modular structure, integrated active ventilation system and safe body position fine adjustment function of the head-pelvis ring traction and turning-over pillow device can significantly improve the bed comfort and nursing safety of patients subjected to head-pelvis ring traction.

This application discloses a waterproof cabinet louver, comprising: a frame assembly, with a plurality of louver components arranged vertically at equal intervals on the inner side of the frame assembly; each louver component includes an upper half and a lower half, which are arranged alternately; an exhaust mechanism is also fixedly connected to one side of the frame assembly. In order to solve the technical problems in the prior art, such as the possibility of water leakage in ordinary louvers under severe windy and rainy weather, and the sacrifice of ventilation area leading to low heat dissipation efficiency of the cabinet, this application designs a louver that combines passive waterproofing, active airflow guidance, and active ventilation. The overall technical solution formed by the unique combination of louver components and exhaust mechanism can achieve efficient ventilation and heat dissipation on non-rainy days and switch to efficient waterproof mode on rainy days. At the same time, the special combination design of the upper and lower half can effectively collect and discharge any small amount of intruding moisture.

An energy storage unit capable of controlling a thermal runaway, comprising an enclosure for housing battery modules for energy storage, a movable panel configurable between a closed position and an open position, a controllable actuator, connected to the movable panel, for moving the movable panel from the closed position to the open position, at least one sensor capable of measuring environmental parameters of the interior of the enclosure and a control unit connected to the sensor and the controllable actuator, for automatically activating the actuator and moving the panel from the closed position to the open position when at least one of the measured environmental parameters is indicative of thermal runaway, so that heat and explosive gases generated by the thermal runaway can escape outside the enclosure. A method for controlling a thermal runaway phenomenon of an energy storage unit comprising battery modules is also described.

The invention discloses a low-carbon full-buried sewage treatment system and an operation and maintenance method, and relates to the technical field of sewage treatment. The low-carbon full-buried sewage treatment system comprises an underground space, an unmanned operation and maintenance module, an intelligent ventilation module, an intelligent lighting module and a personnel detection module, the intelligent ventilation module comprises an air inlet shaft, an air exhaust shaft, a passive ventilation assembly and an active ventilation assembly. The intelligent lighting module comprises a passive lighting assembly and an active lighting assembly. When no one is in the underground space, the unmanned operation and maintenance module is adopted to maintain the operation of the low-carbon full-buried sewage treatment system, and the passive ventilation assembly and the passive illumination assembly are utilized to ventilate and illuminate the underground space, so that the energy consumption is relatively low; when a user enters the underground space, the active ventilation assembly and the active lighting assembly are adopted, the ventilation intensity and the lighting intensity are enhanced, the life safety of the user is guaranteed, a good visual field is provided, and therefore underground operation of the user is facilitated.

The application relates to the technical field of switched reluctance motors, and particularly discloses a switched reluctance motor capable of active ventilation cooling. The switched reluctance motor comprises a ventilation pipe, one end of the ventilation pipe is provided with a high-pressure air pump, an annular ventilation plate is arranged as an annular shell with an annular cavity, the inner side of the annular ventilation plate is provided with small ventilation holes I, the outer side of the high-pressure air pump is sleeved with and fixedly connected with an auxiliary cleaning mechanism. The switched reluctance motor capable of active ventilation cooling carries out air exchange type heat dissipation by filling gas into the inner side of the annular ventilation plate and then discharging the gas from the plugging device through the exhaust round hole, the existing cooling means is usually improved by modifying the motor shell to improve the heat dissipation of the motor, and the active cooling and temperature reduction of the motor are difficult to realize, the gas sprayed by the high-pressure air pump is resisted by arranging the arc-shaped baffle on the inner wall of the annular ventilation plate, and the directly sprayed gas from the small ventilation holes I on the opposite side of the ventilation pipe is prevented from being directly sprayed out, so that the gas is evenly sprayed.

This utility model discloses a breathable and moisture-permeable covering structure for a car armrest, relating to the field of automotive interior technology. It includes breathable leather, a base, and a connecting box. Inside the breathable leather, a sponge layer, a heating plate, and a support plate are sequentially nested, all three having ventilation holes. One end of the base is connected to the connecting box, the lower end of which has a collection box and an air duct, and an internal controller. A water storage box is located inside the base, connected to an absorbent cotton core via a support rod. The absorbent cotton core is wrapped with a heating wire. The upper end of the water storage box is connected to a water inlet via a conduit. The controller is electrically connected to the heating plate, heating wire, and ducted fan. This utility model achieves active ventilation through the ventilation holes and ducted fan, regulates temperature through the heating plate and heating wire, and regulates humidity through the water storage box and absorbent cotton core, solving the problems of poor breathability and uncomfortable temperature in existing armrests. It also features a high-temperature steam self-cleaning function, improving driving and riding comfort.

The application relates to the technical field of building ventilation, and relates to an energy-saving building top ventilation device, which comprises a lower support, a support sleeve is arranged at the top of the lower support, a bottom support is rotationally connected to the support sleeve, ventilation fan blades are uniformly arranged on the bottom support, the top of the ventilation fan blades is fixed on a top support, a shielding frame is rotationally connected to the top support, a blockage prevention mechanism is slidably connected to the shielding frame, and the blockage prevention mechanism is connected with a positive ventilation mechanism; the ventilation fan blades are circumferentially distributed to form a spherical ventilation structure for passive ventilation, and the positive ventilation mechanism can be used for positive ventilation when the wind speed is too low; the blockage prevention mechanism is used for preventing the gaps between the ventilation fan blades from being blocked; and the low-temperature sealing mechanism is used for automatically cutting off the ventilation pipeline when the temperature of the building is too low, so that the external cold air is prevented from invading the building, and the heat loss in the building is reduced.

The utility model discloses an automobile front cabin driving disc assembly which comprises a protective disc, a driving disc body is embedded in the protective disc, a plurality of threaded holes are formed in one side of the driving disc body, a clamping groove is formed in the outer wall of the driving disc body, a plurality of weight reduction grooves are formed in one side of the driving disc body, and the threaded holes are communicated with the clamping groove. A ventilation cavity is formed in the driving disc body, a plurality of turbine blades are fixedly connected to one side of the interior of the ventilation cavity, and a first connecting hole is formed in the center of one side of the driving disc body. By arranging the ventilation cavity, the turbine blades and the like, when the driving disc body rotates, the turbine blades can be driven to rotate synchronously, so that forced airflow circulation is formed in the driving disc body, and external air is sucked in from the weight reduction grooves in one side, flows through the ventilation cavity and then is discharged from the weight reduction grooves in the other side; the active ventilation design remarkably improves the air flow speed around the driving disc body, the heat dissipation efficiency is improved, and long-term stable operation of the driving disc is guaranteed.

The invention relates to the technical field of building ventilation, in particular to an energy-saving building top ventilation device which comprises a lower support, a supporting sleeve is arranged on the top of the lower support, a bottom support is rotationally connected to the supporting sleeve, ventilation fan blades are evenly arranged on the bottom support, and the tops of the ventilation fan blades are fixed to a top support. A shielding frame is rotationally connected to the top support, an anti-blocking mechanism is slidably connected to the shielding frame, and the anti-blocking mechanism is connected with an active ventilation mechanism. Passive ventilation is carried out through a spherical ventilation structure formed by the ventilation fan blades distributed circumferentially, and active ventilation can be carried out when the wind speed is too low in cooperation with the active ventilation mechanism; gaps among the ventilation fan blades are prevented from being blocked by utilizing an anti-blocking mechanism; the low-temperature sealing mechanism is used for automatically cutting off the ventilation pipeline when the temperature of the building is too low, external cold air is prevented from invading the building, and heat loss in the building is reduced.

The invention discloses an active ventilation and heat dissipation device for a mobile phone and a control method of the active ventilation and heat dissipation device. The device comprises a heat conduction part, a hollow heat conduction pipe, an upper loudspeaker, a lower loudspeaker, corresponding sound cavities, a check valve, a temperature detector and a control unit. The heat conduction part conducts heat generated by the mainboard to the hollow heat conduction pipe, the upper loudspeaker and the lower loudspeaker are driven by the control unit to produce sound at a preset frequency, the sound cavity and air in the hollow heat conduction pipe are driven to form penetrating airflow, and the check valve is opened when the airflow intensity exceeds a set threshold value, so that the heat is discharged out of the mobile phone along with the airflow. The temperature detector detects the temperature of the mainboard in real time, when the temperature exceeds a preset threshold value, the control unit drives the loudspeaker to generate ultrasonic airflow to conduct active heat dissipation, and when the temperature drops, driving is stopped or reduced. The device drives airflow through sound waves to realize active discharge of heat in the mobile phone, and has the advantages of high efficiency, silence and compact structure.

The present application relates to underwater launching test technology of a navigation body, in particular to a free launching underwater navigation body test model with active ventilation function. The test model comprises a head section, a column section, a shoulder air chamber and a ventilation system. The outside wall of the shoulder air chamber is provided with a mounting ring in the circumferential direction, which is mounted on the inside of the head of the column section. The bottom of the shoulder air chamber is provided with an air inlet, and the side wall is uniformly provided with air holes in the circumferential direction. A first gap is arranged between the column section and the shoulder air chamber. The head section is mounted on the air chamber cover of the shoulder air chamber, and a second gap is arranged between the head section and the column section. The three parts are connected to form an exhaust passage. The air tank of the ventilation system is mounted in the column section, and the connecting air pipe is connected to the air inlet of the shoulder air chamber. The model can uniformly and stably exhaust air, simulate the evolution process of the ventilation air bubble, and the layered assembly structure is convenient for disassembly, maintenance and comparison test. It can provide reliable test means for revealing the dynamic mechanism of the ventilation air bubble, and solve the problems of low working condition restoration degree and inconvenient maintenance of the existing model.