36results about How to "Avoid impact noise" patented technology

The invention discloses a heat pump system and a defrosting control method thereof. The heat pump system comprises a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger and a heating device. The outdoor heat exchanger is a micro-channel heat exchanger; and during system defrosting, the heating device can heat at least one header pipe of the micro-channel heat exchanger. According to the heat pump system, defrosting is even, the defrosting efficiency can be improved, the system can still heat the indoor space in the defrosting process, the temperature variation amplitude of the indoor side in the defrosting process is reduced, and the system comfort and the defrosting efficiency are improved.

The invention relates to a storey noise control structure and a method for constructing the same. The interlayer noise control structure is used for controlling direct vibration noise transferred among slabs of the storeys of an apartment, preventing and absorbing indirect resonance noise in vibration and impact noise transmitting systems among the storeys of the apartment. The interlayer noise control structure comprises a noise absorption floor, grid-shaped anti-vibration components, moisture-proof components, rubber sheets, a spongy sheet and a second horny comb sheet; the noise absorption floor is formed by rubber components clung to slabs; the grid-shaped anti-vibration components are arranged on the noise absorption floor to form preset curved noise source channels; the rubber sheets are overlapped on the moisture-proof components; the spongy sheets are overlapped on the rubber sheets; the second horny comb sheets are overlapped on the spongy sheets and used for filling cement mortar or butter in the case that floor heat supply pipelines are provided; non-woven fabrics are stuck to the upper surfaces and the lower surfaces of the moisture-proof components, and first horny comb sheets containing vermiculite are integrated in the middle parts of the moisture-proof components; silver foil sheets are stuck to the bottom surfaces of the second horny comb sheets; and top floor materials are stuck to the top surfaces of the second horny comb sheets.

The invention discloses a compressor silencer, which is characterized by the following: forming a cross-shaped projecting part of crank through hole in the central part; extending outsides along the horizontal direction of projecting part to form a circular chassis structure; setting outlet hole along radial direction and through the chassis on two sides of cross-shaped projection part separately. The silencer is set on two lateral ends without setting inner plate, which avoids the noise of the rotor impaction directly.

The invention discloses an electrically-assisted heating device of an air conditioner, which is arranged at the upper side of an air outlet of a spiral case fan in a shell of an indoor unit of the air conditioner. The electrically-assisted heating device is in a grid type structure consisting of a plurality of electric hot plates and a plurality of fins which are longitudinally and horizontally crossed vertically and is provided with quadrate through holes. The electric hot plates are horizontally arranged at intervals, and the fins are longitudinally arranged at intervals so as to form the grid type structure. In the electrically-assisted heating device of the air conditioner, the electrically-assisted heating device is made into the grid type structure so as to play the role of rectification, and airflow coming out of the spiral case of the fan can exchange heat sufficiently and evenly with the electrically-assisted heating device. Meanwhile, because the electrically-assisted heating device is provided with a grid hole, impact noise generated by the indoor unit of the air conditioner due to the electrically-assisted heating device is completely avoided.

The invention discloses an all-directional wedge-shaped pretension sound-proof well lid, comprising a round well base and a cover board. Three locations of the well base internal ring are uniformly set with bidirectional wedge-shaped convex plates convex towards the central direction of the well base. The back of the location of the cover board corresponding to the well base convex plates is set with bidirectional wedge-shaped projections. Each bidirectional wedge-shaped projection is connected with the cover board by an elastic member. The bidirectional wedge-shaped convex plates of the well base have smaller upper slope and larger lower slope. The bidirectional wedge-shaped projections of the cover board have smaller lower slope and larger upper slope. The upsides of the bidirectional wedge-shaped projections of the cover board are compatible with the lower sides of bidirectional wedge-shaped convex plates of the well base. And the cover board is fixed firmly on the well base by the pretension from circumferential and vertical directions. The invention can prevent the cover board from jumping and displacement when being rolled and impacted by automobile and avoid the impact noise of the cover board to the well base.

Provided is a heating device for a hot water mat that can minimize noise by a check valve for controlling flow of liquid. The heating device for a hot water mat includes: a water tank having a tub for keeping liquid and a discharge hole formed through a side of a lower portion to discharge the liquid in the tub; a heating module connected to the discharge hole and heating liquid; a separator disposed in the water tank, dividing the tub in to a first compartment at a lower portion and a second compartment at an upper portion, and having a connection hole for connecting the first compartment and the second compartment to each other; and a check valve disposed in the first compartment and opening and closing the connection hole by moving up and down by buoyancy from the liquid in the first compartment.

A method of controlling a drying machine includes a first load decision step for supplying hot air to the inside of a drum by driving a heater and a fan motor together with drive of the drum and determining, based on variation in a temperature of air discharged from the drum, whether a load applied to clothes accommodated in the drum is a temporary small load or a medium and large load, wherein the variation in temperature of air is sensed by a temperature sensor; a second load decision step which is performed selectively after the first load decision step is performed and the load is judged as the temporary small load in the first load decision step, and in which the hot air supply is interrupted, the drum is driven and whether the load is a small load or an extremely small load is judged by using a dryness sensor of the drum; a drying step based on the load determined in the first load decision step or the second decision step.

The invention provides a rotary meat ball making device capable of automatically continuously producing meat balls, characterized in that: the meat ball making device is driven by a motor and the rotation directions of the two rotary disks are opposite and 1:1 gear commutation is used for in a transmission chain. When two arc brakes of two stuffing feeding plates meet at the discharging gate under the bucket, the meat stuffing immediately is discharged into hot water and then shaped into meat balls. Two large stuffing feeding plates of each machine set are changed into two large round disk, wherein one round disk is driven by the motor and another one is driven after 1:1 gear reversing and the rotation principle is same to the rotation principle of each machine set, a plurality of arc long holes are opened on each large stuffing discharging plate and the arc long holes are in up and down correspondence and a plurality of raw-material cylinder discharge-gates are corresponding with the arc long holes. The production efficiency is increased and the noise is reduced.

The invention discloses a flexible telescopic mechanism used for a bridge. The flexible telescopic mechanism comprises a crossed connecting rod assembly. The connecting positions of the crossed connecting rod assembly are connected through flexible linings. The flexible linings are arranged in the connecting positions of the crossed connecting rod assembly in an interference fit manner. Connectingseats connected with a bridge beam body are rotationally installed in the flexible linings at the crossed connecting positions of the crossed connecting rod assembly, and pin shafts are installed inthe flexible linings at the connecting positions of the end portions of the crossed connecting rod assembly in a clearance fit manner. By means of the flexible telescopic mechanism used for the bridge, the uniformity of the seam width of the beam body is ensured, the flexible telescopic mechanism can adapt to the certain displacement and rotating angle between an edge beam and a middle beam of thebridge when a vehicle passes through the bridge, the impact effect is weakened, the service life is prolonged, the driving comfort is improved, impact noise is lowered, the problems that the seam width of an original telescopic device is not uniform and the impact response is large can be well solved, flexible deformation of the telescopic mechanism is achieved through the flexible linings, the horizontal impact effect of the telescopic mechanism is weakened, the impact and vibration noise caused when the vehicle passes through the bridge are weakened, and the comfort of the vehicle is improved. The invention further provides a bridge telescopic device.

The invention discloses a noise reduction device. The device comprises a box body, one side of the box body is an elastic layer made of an elastic material, noise reduction holes are formed in the elastic layer, and the noise reduction device also comprises a deformation mechanism for driving the elastic layer to deform. The invention also discloses a range hood applying the noise reduction deviceand a control method of the range hood. Compared with the prior art, the device has the advantages that through the arrangement that the shape of at least one side of the noise reduction device can be adjusted, it is convenient to take targeted noise reduction measures for different working conditions; when applied to the range hood, and a vortex and a boundary layer of airflow inside the range hood can be separated for controlling rectification, so that air impact born by an impeller of a fan system is uniform, the noise of the air impact is reduced, the load on a motor is stable, trip stopwhen the range hood operates in different gears is prevented, and a good oil fume absorption effect when a user uses the range hood is ensured under different back pressure conditions at an outlet ofthe range hood.

The invention discloses a push type self-aligning hydraulic release bearing wheel cylinder unit, relating to a vehicular release bearing unit. The push type self-aligning hydraulic release bearing wheel cylinder unit is especially suitable for passenger cars and commercial vehicles using push type clutches, in particular cars using the push type clutches and belongs to the technical field of automobile bearings. The push type self-aligning hydraulic release bearing wheel cylinder unit comprises a self-aligning bearing mechanism, a hydraulic wheel cylinder mechanism and an air bleeder, wherein the self-aligning bearing mechanism consists of an outer ring, an inner ring, a retainer, a steel ball, an inner dustproof cover, an outer cover, an aligning leaf spring, a sleeve and a sleeve seat; the hydraulic wheel cylinder mechanism consists of a cylinder body, a mandrel, a leather ring, a mandrel sealing ring, a return spring and a spring seat; and the air bleeder comprises an oil feeding connector, a clamp, a first O-shaped ring, a second O-shaped ring, an exhaust valve tee joint, an air bleed screw sealing ring, an air bleed screw, an air bleed screw cap, an air feeding connector screw and a choke plug. The push type self-aligning hydraulic release bearing wheel cylinder unit disclosed by the invention has the use function of the release bearing and the function of the wheel cylinder and is hydraulically driven. The push type self-aligning hydraulic release bearing wheel cylinder unit has the advantages of higher service efficiency, longer service life and higher flexibility in operation.

The invention discloses an electronic squatting pan with a heating cushion, which comprises a main body, a heating cushion, a controller, and a pipeline, wherein the heating cushion forms the rotating constraint for a fixed hinge support with the main body, the main body is a fixed part of the fixed hinge support, and the heating cushion is a constrained part of the fixed hinge support; the controller is arranged in the main body; and the pipeline is connected with the controller and the heating cushion. The fixed hinge support comprises a fixed hinge support at the left side of the main body and another fixed hinge support at the right side of the main body which are positioned at the same axis line; and the pipeline is led out of the controller, then passes through a section of inner cavity of the fixed hinge support along the axis line, and is connected with the heating cushion. The design smartly utilizes the section of the inner cavity of the fixed hinge support for the pipeline to pass through to ensure that the pipeline is concealed inside further to obtain effective protection and more beauty; and the pipeline is arranged on the rotating axis line of a hinge, thereby greatly reducing the influence of the torsion on lectronic squatting pan caused by the rotation of the heating cushion, and improving the service life and the reliability.

In an upper door fitting of a sliding door which comprises a housing and two transverse guide rollers which each are rotatably supported each on a shaft stub, both shaft stubs extend parallel to each other and are arranged symmetrically with respect to a vertical longitudinal center plane. Both shaft stubs are rigidly mounted in the housing. In addition, the transverse guide rollers delimit an intake opening of the housing for guiding the sliding door so as to prevent impact noises and jerky movements of the sliding door.

The invention discloses a steering device. The steering device comprises a steering device shell and a gear rack (1) arranged in the shell. The shell comprises an outer shell (2) and a liner (3). A gear rack bush (4) is arranged between the gear rack (1) and the liner (3). An elastic bush (6) with a buffer effect is further arranged between the gear rack (1) and the liner (3) and is a double-layer annular bush composed of an inner-layer elastic piece (61) and an outer-layer elastic piece (62). The steering device is low in modification degree, low in cost, suitable for improvement on existing products and high in usability; abrasion to the gear rack bush can be reduced, so that durability is good.

The invention belongs to an abat vent buffer for vehicles and vessels. The abat vent buffer is provided with a transmission damping jacket, wherein a protruding clamp gear is arranged at one end of the transmission damping jacket, and a fixed shaft of a damping shaft penetrates through a through hole formed in the protruding clamp gear of the transmission damping jacket to be fixedly connected with the side surface of a shutter base frame in a matched mode. A damping inner hole is formed at one end of the transmission damping jacket, damping grooves are evenly distributed on the wall of the damping inner hole, a threaded shaft of the damping shaft is in threaded connection with the a damping shaft sleeve, and protruding strips used for generating damping force are evenly distributed on an outer cylinder of the damping shaft sleeve. The damping shaft and the damping shaft sleeve are arranged in the damping inner hole of the transmission damping jacket, the damping shaft sleeve and the damping inner hole are in fit connection at intervals, high-viscosity oil for assisting damping is filled in the damping inner hole, and the end surface of the damping inner hole is pressed by an end cover for seal. The abat vent buffer for vehicles and vessels has the effects of good stability, long service life, strong universality, muting and shock absorption, and thorough unreeling buffer, and can be applied to abat vents of various small, medium and large-sized vehicles, vessels and special mechanical vehicles as well as civil shutters.

A dividing plate structure of enclosed compressor is disclosed. It is inserted in the internal space of cylinder to divide it into at least two sealed spaces. The barriers is in contact with the upper and lower surfaces of dividing plate for switching said sealed space between suction space and compression space. It feature is that the upper and lower surfaces of dividing plate are curved surfacefor decreasing impact noise and friction.

The invention provides a method and structure for eliminating the noise of a torsion bar system. The structure comprises a supporting seat, a supporting spherical hinge and a torsion bar shaft, wherein the supporting spherical hinge is arranged in the supporting seat; the torsion bar shaft passes through the supporting spherical hinge; after the supporting spherical hinge is compressed in advance,the supporting spherical hinge is in interference fit with the supporting seat; a spherical hinge outer sleeve having a supporting effect is arranged at the outer side of the supporting spherical hinge; a high polymer wear resisting layer with a low friction coefficient is arranged at the inner side of the supporting spherical hinge; the outer layer, matched with the supporting spherical hinge, of the torsion rod shaft is coated with a wear resisting coating with a low friction coefficient; and a tiny gap is formed between the wear resisting layer of the supporting spherical hinge and the torsion bar shaft. The friction coefficient between the supporting spherical hinge and the torsion bar shaft is reduced by adopting a wear resisting self-lubricating friction pair so as to reduce the friction between the supporting spherical hinge and the torsion bar shaft; and the impact noise generated during operation is avoided by reducing the up and down movement range of the torsion bar shaft.The method and structure can eliminate the noise of the torsion bar system, and meanwhile can prolong the service life of the torsion bar system.

The invention discloses a sealed compressor segregation barrier structure, which comprises the following parts: intake, outlet, two sealed space in the cylinder to segregate the cylinder into at least, sealed compressor segregation barrier to exchange the segregated space into intake and compressive domain when two laterals and blade impact and revolve, which contains curved face of specific function curve on two laterals of touching blade. The segregation barrier concludes curved face and point of inflection with plane face around. The flexion is formed by connecting the curved face and plane face, which prevents the impaction noise between blade and segregation barrier in advance. Otherwise, the arc connection is formed between the segregation barrier and plane face, which avoids the bearing face fish tail on the bearing stand.

In the invention, a division inserted in the internal space of the cylinder with a suction port and a discharge port can divide the internal space into at least two or more closed spaces, and on two sides of the division is pressed-in a jointed sliding-vane. While rotating, each closed space is changed into suction and discharge zones. Two sides of the division being in contact with the sliding vane form zones with different curvatures to make the angle between the axial vertical centre-line and the inclined plane pass the vertical centre-line continuous change in the range between 25 deg. to 70 deg. The vanes are always in the state in contact with cam surface to prevent producing impact noises between the vanes and the division.

The present invention relates to an automatic tension controlling apparatus for a thermotherapy device, and more specifically, an automatic tension controlling apparatus for a thermotherapy device, comprising: a transport member (10); a driving force transferring member (20), connected to the transport member (10), for transferring driving force to the transport member (10) through a driving means (40); and a tension control means (30), coupled to the transport member (10), for maintaining and controlling the tension of the driving force transferring member. As a result, the present invention provides the automatic tension controlling apparatus in which the driving force transferring member for transferring driving force to the transferring member transfers driving force by being coupled to the transport member, and when the driving force transferring member becomes lax due to extension or loosening from long-term use when an option such as a chain, a timing belt, a rope, or a steel wire is used as the driving force transferring member, the tension control means controls so that tension is maintained at a constant level by pulling the driving force transferring member as much as the length that is loosened, thereby enabling smooth transport work by the transport member, reducing loss of driving force, preventing friction noise due to the driving force transferring member or shock noise from coming into contact with a bottom surface, and prevents unnecessary increase of tension in the driving force transferring member to prevent deformation of a housing of the thermotherapy device due to contraction or distortion.