9results about How to "Avoid unusual noise" patented technology

The utility model provides an indoor unit of an air conditioner, which comprises a water pan arranged below an indoor heat exchanger; the indoor heat exchanger comprises a first-section heat exchanger, and the bottom end of the first-section heat exchanger is located behind the top end of the first-section heat exchanger in the front-back direction of the main body; in the front-back direction of the main body, the bottom end of the second-section heat exchanger is located in front of the top end of the second-section heat exchanger; the second-section heat exchanger is positioned behind the first-section heat exchanger; the third-section heat exchanger is positioned above the first-section heat exchanger; the space on the front side of the indoor fan can be fully utilized, the space in the height direction is fully utilized, the heat exchange area is increased, the heat exchange effect is improved, the height size is small, and the air conditioner indoor unit can be installed above a window or a door; an indoor air inlet is formed in the front side of the water pan; at least part of the indoor air inlet is located on the front side of the water pan and located below the third-section heat exchanger, and heat exchange of the first-section heat exchanger and the third-section heat exchanger is facilitated.

The invention discloses a foreign matter detection device, a control method and a circulating fan. The device comprises a strong magnetic sheet which is fixedly arranged on a blade of the circulating fan; the induction coil is arranged on the edge of a fan face cover of the circulating fan; the micro-current sensor is connected with the induction coil and is used for collecting induction current generated in the induction coil; and the main control chip is connected with the micro-current sensor and is used for determining whether a foreign matter enters the circulating fan or not according to the induction current generated in the induction coil and collected by the micro-current sensor, and controlling a motor of the circulating fan to stop rotating when determining that the foreign matter enters the circulating fan. By means of the circulating fan, the problem that when foreign matter enters the circulating fan, the motor is damaged or surrounding people or objects are injured can be solved, the safety and stability of the circulating fan can be improved, the service life of the circulating fan can be prolonged, noise caused by the foreign matter can be avoided, and the user experience is improved.

The utility model provides an indoor unit of an air conditioner, which comprises a main body at least comprising a first cavity positioned in the main body; the main body comprises an indoor heat exchanger arranged in the first cavity; the indoor fan comprises an indoor fan; in the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped, and the side, away from the indoor fan, of the indoor heat exchanger protrudes. One end of the indoor heat exchanger in the width direction is positioned in front of the indoor fan, and the other end of the indoor heat exchanger in the width direction is positioned behind the indoor fan; in the width direction of the indoor heat exchanger, the lowest point of the indoor heat exchanger is located below the indoor fan and located between the two ends of the indoor heat exchanger in the width direction, the front-back size and the height size of the indoor heat exchanger can be reduced, space occupied by the indoor heat exchanger in the first cavity is reduced, and then the front-back size and the height size of the main body are reduced; the cost of the indoor unit of the air conditioner is reduced, and the indoor unit of the air conditioner can be installed in narrow spaces such as windows or doors in lower spaces such as kitchens.

The utility model provides a brake block active return spring piece used for reducing dragging of calipers, which comprises a piece-shaped spring piece body, the spring piece body comprises a U-shaped part and V-shaped parts arranged on two sides of the U-shaped part in a mirror image mode, the two V-shaped parts are in smooth arc connection with the U-shaped part, a mounting plate is arranged on one side of the U-shaped part, a mounting hole is formed in the mounting plate, and the U-shaped part is connected with the U-shaped part in a smooth arc mode. Arc parts are arranged at the ends, away from the U-shaped part, of the two V-shaped parts, and inner arcs of the two arc parts face the U-shaped part; the spring piece body comprises the U-shaped part and the V-shaped parts arranged on the two sides of the U-shaped part in a mirroring mode, the spring piece is simple in structure, high in use reliability and convenient to manufacture and produce in batches, the included angles are in circular arc transition, stress concentration is reduced, the included angle of 25 degrees is formed between the U-shaped part and the oppositely-connected V-shaped parts, the included angle between the V-shaped parts is 35 degrees, and the service life of the spring piece is prolonged. The included angle of 95 degrees is formed between the two bent positions of the U-shaped part, so that the U-shaped part has high resilience force when being stressed, and the U-shaped part can quickly respond and rebound to the initial position after the extrusion force is lost.

The invention provides a method for improving abnormal running noise of a tire, and belongs to the technical field of tires. The method for improving the abnormal running noise of the tire comprises the following steps: step 1, changing a vulcanization setting pressure value in a vulcanization process; 2, the stability of tire uniformity data numerical values is guaranteed; in the step 1, the number of the ecological tire grabbing walls is eight after the tire is formed. In the step 2, the value of the tire uniformity R9H is 2.8. In the step 1, the setting pressure value in the vulcanization process is 7.8. By adjusting the tire process, the uniformity (R9H) of the tire is ensured by ensuring stable shaping pressure in the vulcanizing process of the tire, the forming process is controlled to reduce the deformation of the green tire, abnormal noise and customer complaints are avoided, the green tire grabbing arms are changed from 6 to 8 in the circumferential direction after the tire is formed, and the deformation of the green tire is reduced. And therefore, abnormal noise generated during running of the tire is prevented.

This utility model relates to the field of curtain machine technology and discloses a positioning mechanism for a curtain machine. The positioning mechanism is mounted on a movable body on a curtain track. The positioning mechanism includes a suspension part and two sets of longitudinal pressure rollers. The suspension part is a roller rotatably mounted on the movable body and is suspended from the curtain track. The longitudinal pressure rollers are mounted on the movable body and configured to abut against the curtain track upwards under elastic force. The two sets of longitudinal pressure rollers are positioned at a height difference from the suspension part, and the two sets of longitudinal pressure rollers are located in front of and behind the suspension part along the length of the guide rail body, so that the suspension part and the two sets of longitudinal pressure rollers are triangularly distributed. The two sets of longitudinal pressure rollers and the suspension part clamp the curtain track longitudinally, thereby limiting the up-and-down swaying of the movable body, greatly enhancing the stability of the movable body on the curtain track, enabling the movable body to operate smoothly and steadily, and ensuring the reliability of the curtain opening and closing operation.

The present application provides a vibration reduction assembly, a compressor and an air conditioning system. The vibration reduction assembly includes a chassis, a vibration reduction block and a fastener, one end of the fastener is arranged on the chassis through the vibration reduction block; the vibration reduction block can reduce the vibration transmission between the chassis and the fastener. The vibration reduction block is arranged between the fastener and the chassis to ensure that the vibration between the two can be completely attenuated through the vibration reduction block, thereby avoiding the generation of abnormal noise.

The vibration absorption structure is installed on a motor body so as to absorb vibration generated by a motor, the vibration absorption structure comprises a plurality of vibration absorption units arranged on the circumferential surface of the motor body at intervals, each vibration absorption unit comprises an elastic piece and a balancing weight, and the elastic pieces are arranged on the circumferential surface of the motor body. The elastic piece is attached to the surface of the motor body, and the balancing weight is connected to the tail end, in the axial direction of the motor body, of the elastic piece; the first ratios of the at least two vibration absorption units are different, and the first ratio is the ratio of the length of the elastic piece to the mass of the balancing weight. According to the vibration absorption structure, the fan comprising the vibration absorption structure and the range hood comprising the vibration absorption structure, through the vibration absorption structure, vibration of the motor body is reduced from the source, noise is effectively reduced, the peak value of multi-frequency vibration is effectively reduced in an elastic vibration absorption mode, abnormal noise is avoided, and the sound experience effect is improved.

The utility model provides an indoor unit of an air conditioner, which comprises a first-section heat exchanger, a second-section heat exchanger and a third-section heat exchanger, a second-section heat exchanger; a third-section heat exchanger; the included angle between the width direction of the second-section heat exchanger and the horizontal plane is a third included angle alpha3 which is larger than or equal to 45 degrees; the included angle between the width direction of the third-section heat exchanger and the horizontal plane is a seventh included angle alpha7 which is larger than or equal to 45 degrees; the included angle between the width direction of the first-section heat exchanger and the width direction of the second-section heat exchanger is a fourth included angle alpha4, alpha4 is larger than or equal to 90 degrees, alpha3 is larger than or equal to 45 degrees, alpha7 is larger than or equal to 45 degrees, and alpha4 is larger than or equal to 90 degrees. The space in the front-back direction and the height direction of the main body can be fully utilized under the condition that the heat exchange area of the indoor heat exchanger is sufficient, the height size and the front-back size of the main body are reduced as much as possible, and the air conditioner indoor unit can be installed in narrow space such as the upper portion of a window or a door.