87results about How to "Good rainproof" patented technology

This invention discloses a method for preparing a waterproof acrylate coating agent. The object coated with the waterproof acrylate coating agent has such advantages as soft touching sense, high water resistance, high waterproof effect, and high film -forming performance, and high wind, rain, gigging and cold resistance. The generated waste gases can be incinerated in a catalytic incinerator, thus the waterproof acrylate coating agent is environmentally friendly.

A bulletproof helmet free of connectors and hole connections is prepared as forming and distributing multi-group connection elements symmetrically to central axis in bulge free mode as per requirement of connection-fastening system at internal wall of casque shell when said shell is formed by nonmetal material, enabling to connect said system to said elements in separated way, using a regulation-fastening belt to connect said shell and said system together to form Y shaped three-way regulation-fastening unit with lower jaw part being able to be regulated dynamically.

The invention discloses a 360-degree vertical lockrand profiled steel plate construction technology and device, and belongs to the field of construction. The construction technology comprises the following steps that a layout drawing is drawn, personnel arranging and training are conducted, a profiled steel plate is suppressed and formed in situ, a steel frame main body is mounted, and inspectionand acceptance are conducted; purlins are mounted at the steel frame, the purlins are measured and payed off, roof tiles are hoisted to the position above the purlins; a first row of embedded fastenings are mounted, a first roof tile is laid, a second row of embedded fastenings are mounted, water-proof butyl packaging tapes are laid at the rib edges, and a second roof tile is laid; and the rest roof tiles are paid sequentially. The substrate is thick and strength is high. After suppressing forming and mounting, longitudinal lap joint seam vertical lockrand is bitten into 360 degrees. The continuous water-proof butyl packaging tapes are pre-applied to rib edge seams, and the water resistance and leakage resistance effect is excellent. The fastening supporting seat is slidable, and thereforedamage caused by roof deformation due to expanding with heat and contracting with cold is solved. The technology is efficient and safe, and is high in quality, and good social and economic benefits are achieved.

The invention discloses a solar intelligent navigation power supply station for a robot mower, which comprises a power supply satiation body, a solar energy mechanism, a main control box, an intelligent navigation system, an electronic fence system, an intelligent charging system and a rain water induction system; the solar energy mechanism is arranged at the top of the power supply station body; the main control box is arranged inside the power supply station body; the main control box is connected with the solar energy mechanism, the intelligent navigation system, the electronic fence system, the intelligent charging system and the rain water induction system; and the main control box controls the intelligent navigation system and the electronic fence system to emit electromagnetic signals and sends instructions to the robot mower so as to ensure that the robot mower does mowing normally and safely in a delineated working area. The solar intelligent navigation power supply station can convert solar energy into electrical energy so as to provide charging source for the robot mower as well as electricity for normal working of the electronic fence system, the intelligent navigation system and the intelligent rain water induction system, so that intelligentized power supply of solar energy is realized, and resource consumption and pollution to the environment by wastes are reduced.

The invention provides a turnover type rainproof cushion. The turnover type rainproof cushion comprises a cushion main body, a strut and an inserting part, wherein holes are respectively formed in the cushion main body and the strut; the inserting part is used for realizing connection between the cushion main body and the strut; a groove in the cushion main body is matched with a groove in the strut to support turnover of the cushion main body; the inserting part is divided into a first section and a second section; the inserting part penetrates through the holes in the cushion main body and the strut; when the first section of the inserting part is in the holes in the cushion main body and the strut, the cushion main body is fixed and cannot be turned over; and when the second section of the inserting part is in the holes in the cushion main body and the strut, the cushion main body can be turned over around an axis of the inserting part. The back surface of the cushion main body of the turnover type rainproof cushion is upwards through a turnover mode when a rider leaves a bicycle; through adoption of an eave-shaped structure, the front surface of the cushion main body is kept in a dry state; the cushion main body can be directly used without being erased when being turned back; and the invention is advantaged in that the turnover type rainproof cushion is very simple and convenient to operate, single hand operation in the whole process is supported and rainproof and safety performances are good.

The invention discloses an outdoor cable bridge which is convenient for rainproofing. The cable bridge includes a bridge wire slot and a bridge cover plate arranged on the bridge wire slot. The cross section of the bridge cover plate is in an inverted V shape. The bottoms of the two inclined plates of the cover plate are respectively provided with cover plate buckle grooves, the distance between the two cover plate buckle grooves is consistent with the distance between the two side plates of the bridge wire groove, and the bottoms of the two inclined plates of the bridge cover plate are also Baffles are respectively provided, and the baffles are arranged on the outside of the side plates of the bridge wire slots, and the side plates of the bridge wire slots are provided with cooling holes at the positions corresponding to the baffles, and the bridge cover plates Diversion grooves are arranged on the two slant plates along their inclination directions. The present invention can avoid rainwater soaking or immersion damage to the cable bridge frame used outdoors, and can also ensure the ventilation and heat dissipation of the cable bridge frame, thereby effectively protecting the cable bridge frame itself from corrosion and ensuring the safety of cables in the cable bridge frame.

The invention discloses a vehicle-mounted intelligent rainproof ventilative denoising device, belongs to the technical field of rainproof ventilative denoising devices and solves the problem of poor ventilation effect when a window is closed tightly or the problems of rain leakage and high noise in the prior art. The device comprises a transparent window, a groove protruding into a vehicle is formed in the glass window, a ventilation hole is formed in the bottom of the groove, a retaining plate is obliquely arranged in the groove, the lower end of the retaining plate extends out of the groove, and the upper end, the left end and the right end of the retaining plate are movably matched with corresponding side walls of the groove respectively. The device is used for rain prevention, ventilation and denoising.

The invention provides a mechanical equipment hoisting frame convenient to disassemble and assemble. The mechanical equipment hoisting frame convenient to disassemble and assemble comprises a base, moving wheels, a height adjusting frame structure, an adjustable hoisting frame structure, a defensing hoisting hook device, a hand-tight bolt structure, a bearing plate, a reinforcing brace, a motor seat, a control switch, an electric hoist, an oil wire rope, a pulley, a limited wheel, a connecting plate, a U-shaped buckle and a bearing frame. According to the mechanical equipment hoisting frame convenient to disassemble and assemble, the arrangement of a handle, a threaded rod and an anti-skidding sleeve facilitates the manual disassembly or assembly of the mechanical equipment hoisting frameconvenient to disassemble and assemble by a worker and solves the problem that the hoisting frame is convenient to disassemble; a limited inserting rod is movably inserted in a limited hole formed inthe middle of the right side of the front surface of a telescopic link, thus facilitating the worker to adjust the length of the hoisting frame according to hoisting requirements and solving the problem that the length of the hoisting frame cannot be adjusted; and the arrangement of a rainproof cover facilitates the hoisting frame to resist rain for hoisting mechanical equipment in cloudy and rainy weather and solves the problem that the hoisting frame cannot resist rain for the hoisting equipment.

The invention provides multifunctional lifting equipment for architectural engineering convenient to install. The equipment comprises an H-shaped bearing steel frame, a baffle plate bracket, a controlswitch, an adjusting hydraulic column device, an anti-falling hanging hook device, a lifting motor device, an anti-collision spring column device, a movable wheel, a waterproof box, an adjusting switch, a control wire, an oil wire rope, an illuminating lamp tube, a lamp base and a rainproof cover. Through arrangement of a hydraulic extension cylinder and a hydraulic extension rod, the height adjustment of the lifting equipment is facilitated, and the problem of incapability of adjusting the height is solved; through arrangement of an anti-falling spring piece, hung objects are prevented fromunhooking to damage, the lifting safety of the lifting equipment is improved, and the problem of no anti-falling clamping ring on a hanging hook is solved; and through arrangement of a damping pipe, an anti-collision spring and a damping cylinder, a lifting motor and a limiting roller are protected from colliding in left-right translation, and the problem of no collision preventing function is solved.

The invention relates to a terrestrial digital television station system and belongs to the technical field of television signal transmitting and receiving. The terrestrial digital television station system comprises a signal processing subsystem, wherein the signal processing subsystem comprises a satellite receiving antenna, a satellite receiving decoder, an encoder, a digital exciter, a transmitter and a transmitting antenna; the satellite receiving decoder completes satellite signal receiving and decoding; the obtained video and audio signals are sent to the encoder, sent to the exciter by virtue of an ASI (asynchronous serial interface) interface, modulated into an RF (radio frequency) signal by the exciter and then transmitted to the transmitter; and the signals are subjected to power amplification by virtue of the transmitter and then are connected to a feeder by virtue of a rigid feedback element, an elbow and a flange and sent to the transmitting antenna to be transmitted out. The terrestrial digital television station system is easy to mount and can adapt to field operation tasks; meanwhile, the system is good in anti-seismic property, has good rainproof, dustproof, heat insulation, heat preservation and anticorrosion properties and can serve for a long time in wicked environments such as the wild, a mountainous area and salty air.

The invention relates to a rainproof device, in particular to a rainproof device of a filter for high-voltage harmonic processing. The rainproof device, which thoroughly prevents rain, is simple and convenient to operate and can be used for dehumidification timely, of the filter for high-voltage harmonic processing is provided by the invention. In order to solve the abovementioned technical problem, the rainproof device of the filter for high-voltage harmonic processing comprises first supports, a base, second supports, electric drive push rods, first rain shading plates and first sliding rails, wherein the first supports and the second supports are symmetrically arranged at a left side and a right side of the top of the base, the first supports are arranged between the second supports, the first sliding rails are arranged at the tops of the first supports, first sliding blocks are arranged on the first sliding rails, and the first rain shading plates are arranged at the tops of the first sliding blocks. By the rainproof device, the effects that the rainproof device thoroughly prevents rain, is simple and convenient to operate and can be used for dehumidification timely are achieved, the functions of rain prevention, dehumidification and the like can be simultaneously started by the rainproof device, and versatile functions of the device are achieved.

The invention relates to a communication tower with a rainproof function, comprising a lightning rod, an antenna, a fixing seat, a vertical pole, an inverted-V-shaped cover, an antenna shell, a contractive door and a support. The inverted-V-shaped cover is welded to the antenna shell; the antenna shell is mounted on the support; the side of the antenna shell is provided with a viewing window; the lower end of the antenna shell is provided with a slide groove and a door storage box; the door storage box is provided with a fixing screw hole; one end of the contractive door is fixed in the door storage box; the support is provided with a retractable unit, and the retractable unit is provided with an adjusting screw. According to the communication tower, the retractable unit is provided to help adjust the height of the support, the viewing window is provided to allow viewing the working of the antenna, and the contractive door is disposed at the lower end of the antenna shell to help prevent rainwater from entering the antenna shell; the communication tower is good in rainproof function, simple in structure, easy to operate and economical and practical.

The invention discloses a fresh wind filtering rainwater separator for an air conditioner unit of a rail vehicle, which can effectively prevent rainwater from entering the air conditioner unit. The rainwater separator comprises a framework, a protective screen arranged at the front end of the framework, and a row of a plurality of vanes arranged in the framework at the rear end of the protective screen, wherein middle part bent edges are arranged at the left ends of the middle parts of the vanes, and a first waterproof filter core is arranged in each of the middle part bent edges; rear part bent edges are arranged at the right ends of the rear sides of the vanes, and a second waterproof filter core is arranged in each of the rear part bent edges; and ventilation gaps are formed between the adjacent vanes, and a third waterproof filter core is arranged at the rear end of each of the ventilation gaps. The rainwater separator disclosed by the invention has the advantages of being low in wind-inlet resistance, good in rain-proof effects and good in wind-inlet effects, the normal work of the air conditioner unit of the rail vehicle is guaranteed, and the energy consumption of the air conditioner unit of the rail vehicle is reduced.

The invention discloses monitoring equipment for a plant area. The monitoring equipment comprises a mounting block fixedly mounted on a building wall body and a bracket fixedly connected to the mounting block. The monitoring equipment is characterized in that a supporting plate is fixedly arranged on the left side of the top of the bracket; a first cover plate is fixedly arranged on the top of theright side of the supporting plate; a first cover plate groove is formed in the bottom end surface of the first cover plate; and a second cover plate groove communicating to the first cover plate groove is formed in the right end of the first cover plate. The monitoring equipment disclosed by the invention is simple in structure and safe and reasonable in design. The position of a monitoring probe in left and right directions and the rotating angel position of the monitoring probe can be adjusted automatically, and the height of the monitoring probe can be also adjusted, so that the plant area can be monitored all around by the monitoring probe. The first cover plate and the second cover plate can better prevent rain, shield sun and prevent dust. The service life of the monitoring probe is prolonged, the input cost of a plant is reduced, and the whole monitoring equipment is safe and stable to operate, simple, convenient and rapid to operate and suitable for a large plant area.

The invention discloses a roughcast house type greenhouse. A cross arm (2) and a buffering anti-compression support (3) are fixed in the upper middle of each vertical column (1), a diagonal retainer (4) is connected between each vertical column (1) and the corresponding cross arm (2), support stays (5) are connected between the tops of the adjacent vertical columns (1) and to two ends of each cross arm (2), an insulation film (6) covers the support stays (5), the bottom of the insulation film (6) is fixed on the ground through pressure strings (7) and pressure columns (8), a jackscrew support (9) is mounted between the vertical columns (1), and one end of the support stay (5) at the top of each vertical column (1) is fixed at the top end of the vertical column (1), and the other end of the support stay (5) passes through the corresponding buffering anti-compression support (3) to be fixed at the top end of the vertical column (1) adjacent to the former vertical column (1). The roughcast house type greenhouse is low in cost, wide in application range, firmer, more flexible, effective in wind proofing, rain proofing and snow proofing, and widely applicable to cultivation of various plants such as vegetables, flowers, plantlets and the like, and integrated insulated breeding and sun-shading and the like for animals such as domestic fowls, livestock and the like.

The invention discloses a copper-clad aluminum wire drawing device which comprises a base, a copper-clad aluminum wire, a moving wheel, a fastening hand wheel, a slip preventing device, a drawing roller device, a reinforcing rod, a hand rod, a load bearing rod, a connecting plate, a protective cover, a power motor, a control switch and a toolbox device. One end of the copper-clad aluminum wire islongitudinally clamped at the left upper part of the drawing roller device, and the other end passed through the left lower part of the drawing roller device and the left internal part of the base. According to the invention, an anti-off bracket, an anti-off clamp plate and a hoop are arranged to prevent the copper-clad aluminum wire from falling down; the problem that a traditional drawing deviceis easy to slip off is solved; a first level rubber roller and a second level rubber roller are arranged to solve the problem that the copper-clad aluminum wire is easily damaged by the traditional drawing device, which is beneficial to the work of staff; and a drawer is arranged to solve the problem that the traditional drawing device lacks a maintenance tool storage box.

The invention discloses a crystal tombstone and a manufacturing method thereof. The crystal tombstone is manufactured through artificial crystals. A tombstone body of the crystal tombstone is solid. The surface of the tombstone body of the crystal tombstone is provided with a plane and/or three-dimensional colored or colorless patterns and/or characters, wherein the plane is carved through a laser carving machine and/or a rotating carving machine. The surface of the tombstone body is further provided with a colored or colorless departed saint picture carved through the laser carving machine. According to the crystal tombstone, a traditional stone or artificial stone tombstone is replaced with artificial crystal glass, the tombstone body is completely transparent and can reflect sunlight, a fashionable sunny tombstone group with the modern characteristics and the innovated idea is made, the visual impact, the good light transmittance, the whole shocking sense and the obvious image are achieved, a deep impression is given to people, the people will feel conspicuous, and a forerunner path is developed for the future funeral and interment industry. The patterns, the characters and the picture can be carved on the tombstone body and never fade, the crystal tombstone is exquisite and is like artware, the personal character is demonstrated, and people are made to be reluctant to leave.

The invention discloses a pre-assembly box transformer station of an environment-friendly type, and the box transformer station is characterized in that the box transformer station comprises a three-phase transformer box, circulating cooling fans, air incoming caps, air outlets, a rubber separation plate, a bottom spring, a side spring, and an elastic supporting column. The three-phase transformer box packages an A-phase transformer, a B-phase transformer and a C-phase transformer, and the tops of the three transformers are fixedly connected with a thermal insulation cap. A rainproof layer is fixedly connected on the thermal insulation caps. The air incoming caps are communicated with the side surfaces of the transformers, and the circulating cooling fans are disposed at the upper parts of the interiors of the transformers. The air outlets are disposed at the front ends of the transformers. An oil transformer state judgment device comprises a gas index module, a gas weight value calculation module, a central parameter module, an end parameter module, a state judgment module, and a correction module.

The invention discloses a vertical shaft deviation monitoring method based on tilt angle sensors. The vertical shaft deviation monitoring method comprises the steps: two to three datum points are arranged on the positions along bed rock, and the corresponding tilt angle sensors are mounted on all the datum points in case of examination; a plurality of measuring points are arranged on the shaft wall in the axial direction of a main shaft, and the corresponding tilt angle sensors are mounted on all the measuring points; and matched power supplies and data transmission cables are mounted for thetilt angle sensors and strain sensors, connected to the ground and connected with an automatic collecting device and system to achieve automatic and real-time collecting. According to the monitoring method for measuring the vertical shaft deviation through the tilt angle sensors, the measuring precision is high, the resolution ratio is 0.001 degree, the full measuring range precision is 0.005 degree, the temperature excursion is 0.001 degree/DEG C, environmental adaptability is good, the protection level is IP67, the tilt angle sensors can operate normally under the environment of minus 30 DEGC-85 DEG C, requirements of coal mine vertical shaft deviation monitoring can be met, sensor signals are transmitted to a ground control terminal on the shaft through a main optical cable, and thus automatic and real-time collecting is achieved.

The invention provides a temperature-sensing self-starting fire extinguishing system for a box type transformer substation. The temperature-sensing self-starting fire extinguishing system comprises foundation bolts, fixed bases, a bottom supporting base, an anti-sliding cushion, a drive vertical base, a driven vertical base, a temperature sensor, a smoke sensor, an image detecting sensor, the boxtype transformer substation, a connecting base, a convenient-to-maintain type auxiliary supporting frame capable of lifting to adjust, and a fillable type quick-spraying fire extinguishing protectivehead structure. According to the temperature-sensing self-starting fire extinguishing system provided by the invention, movable frames, U-shaped slide blocks, linear type slide rails, fixed lining bases, lifting screws, fixed nuts and rotary handles are arranged, so that the rotary handles can be held in hands to rotate the lifting screws to act inside the fixed lining bases according to mountingneeds of the box type transformer substation, and the fixed nuts drive the movable frames to lift and move for working; and the U-shaped slide blocks slide on the outer walls of the linear slide rails, so that the height positions of the movable frames can be changed, and therefore, height positions of the box type transformer substation are conveniently changed, and maintaining, repairing and mounting operations are conveniently performed.

The invention discloses a top protection structure applied to wind power tower drums after hoisting two vertical sections and a paving method thereof. The top protection structure comprises a rainproof tarpaulin hood, a stainless steel awning ring rainproof tarpaulin and a tensile rubber rainproof tarpaulin, wherein the rainproof tarpaulin hood is a circular hood with shape and size which are matched with that of the top of a second tower drum section; the stainless steel awning ring rainproof tarpaulin is sewed on the inner layer of the rainproof tarpaulin hood; a plurality of stainless steelawning rings are embedded at the edge of the stainless steel awning ring rainproof tarpaulin; one end of a hemp rope is fixedly fastened in one hole of each of the plurality of stainless steel awningrings; the tensile rubber rainproof tarpaulin is vertically sewed on the circumference edge of the rainproof tarpaulin hood to form a straight drum shape; tensile rubber bands are sewed on the innerlayer of the tensile rubber rainproof tarpaulin; through the sewed tensile rubber bands, the tensile rubber rainproof tarpaulin is clung to the surface of the circular outer wall of the top of the second tower drum section during paving. The top protection structure has operability and practical significance to the protection problems such as rainwater resistance, sand and dust resistance and corrosion resistance and the like of wind power plants after hoisting two vertical tower drum sections.

The invention discloses a rainproof ventilating window, and belongs to the technical field of windows. The rainproof ventilating window comprises a window frame, a window bar, a screen window, louversand an adjusting mechanism, wherein the window bar is arranged in the window frame, the outer side of the window bar is provided with the multiple louvers from top to bottom, one end of the window bar is provided with an adjusting mechanism for driving the multiple louvers to rotate simultaneously, the inner side of the window bar is detachably connected with the screen window, and the end, closeto the adjusting mechanism, of the inner side of the window bar is provided with a control panel for controlling the adjusting mechanism to work to make the multiple louvers rotate a corresponding angle according to weather change. The rainproof ventilating window has the advantages that the multiple louvers and the screen window are arranged on one window bar, the angle of the louvers can be conveniently adjusted according to weather conditions, the window can be opened on windy and rainy days, rain prevention and prevention of the condition that mosquitoes enter a room are achieved, the requirement of indoor ventilation is met, and the louvers and the screen window are convenient to clean and replace.

The invention discloses a rain-proof insect detection lamp, and belongs to the technical field of agricultural and forestry insect forecast. The lamb comprises a box body, a box cover and a control module, and two sets of lifting devices are arranged between the box body and the box cover; the inner side of the box cover is provided with a trap lamp, the trap lamp is connected with a plurality ofimpact screens; a rain-proof plate is disposed in the box body, the middle part of the rain-proof plate is provided with a insect gathering hopper, the input end of the insect gathering hopper is located below the impact screens; the lower part of the output end of the insect gathering hopper is provided with a transport network belt, and the transport network belt is connected with a power device; a water collecting tank is arranged below the transport network belt, and a drainage pipe extending out of the box body is arranged on the water collecting tank. The rain-proof insect detection lampis provided with the lifting devices, which play a good role of rainproof and dust-proof when standby; the rain-proof insect detection lamp can work normally in rainy days, the transport network beltserves as a water filtering and insect transporting device to avoid insects sticking to the water filtering and insect transporting device, so that the accuracy of data in rainy days is improved.

The invention discloses a moistureproof outdoor power distribution cabinet, and the cabinet comprises a power distribution cabinet body, a left power distribution cabinet and a rainproof cover; an inner power distribution cabinet is installed in the power distribution cabinet body, a front ventilation plate is installed below a cabinet door, a base is fixed below the power distribution cabinet body, and a right power distribution cabinet is installed on the right side of the left power distribution cabinet; first vent holes are formed in the two sides of the rain cover, fans are installed in the left power distribution cabinet and the right power distribution cabinet, a first sub power distribution cabinet and a second sub power distribution cabinet are installed below the second isolationplate, and meanwhile, the first sub power distribution cabinet is located above the second sub power distribution cabinet; insulating columns are fixed below the left power distribution cabinet and the right power distribution cabinet. The cabinet not only has good moistureproof and rainproof effects, but also has good ventilation and heat dissipation effects without affecting the rainproof effect, and the cabinet can also greatly reduce the noise in the power distribution cabinet.

The invention discloses an electric heating rainwater separator of an air conditioning unit for a railway vehicle. The electric heating rainwater separator is good in snow melting effect. The electric heating rainwater separator comprises a framework, a plurality of first waterproof filter cores arranged at the front end of the framework in one row, and a plurality of second waterproof filter cores arranged in the framework behind the first waterproof filter cores in one row, third waterproof filter cores are uniformly arranged between the first waterproof filter cores and second waterproof filter cores, a first water baffle plate is arranged at the rear end of each third waterproof filter core, a second water baffle plate is arranged at the rear end of each first waterproof filter core, ventilation gaps remain between the first waterproof filter cores, second waterproof filter cores and third waterproof filter cores, electric heating pipes are arranged in the first waterproof filter cores, and a wiring protection box connected with the electric heating pipes is arranged at the front end of the framework. The electric heating rainwater separator of the air conditioning unit for the railway vehicle has advantages that the snow or ice water can be melted timely, the rainproof effect and air inlet effect are good, the normal work of the air conditioning unit for the railway vehicle is guaranteed, and the energy consumption of the air conditioning unit for the railway vehicle is lowered.

The invention discloses a moistureproof outdoor power distribution cabinet comprising a power distribution cabinet body, a left power distribution cabinet and a rainproof cover; an inner power distribution cabinet is arranged in the power distribution cabinet body; a front ventilation plate is arranged below the a cabinet door; a pedestal is fixed below the power distribution cabinet body; a right power distribution cabinet is arranged on the right side of the left power distribution cabinet; two sides of the rainproof cover are respectively provided with a first air vent; a fan is respectively arranged in the left and right power distribution cabinets; a first sub-power distribution cabinet and a second sub-power distribution cabinet are respectively arranged below a second isolation board; the first sub-power distribution cabinet is arranged above the second sub-power distribution cabinet; an insulation column is respectively fixed below the left and the right power distribution cabinets; the moistureproof outdoor power distribution cabinet has excellent moistureproof and rainproof effects, has excellent ventilation heat radiation effects without affecting the rainproof effect, thus greatly reducing the power distribution cabinet internal noises.