摘要:
A compressor for compressing refrigerant in an air conditioning or refrigeration system, including a housing having a suction port, a discharge port, and a compression chamber, a mechanism for producing a compression cycle for compressing the refrigerant, wherein the compression cycle occurs in the suction port, discharge port and compression chamber, and a mechanism for providing liquid refrigerant into the compression cycle at a desired location for reducing pressure pulsations and associated radiated noise produced during the compression cycle.
摘要:
The angular extent of the flow path in a fan scroll is extended by reducing the rate of radial expansion of the flow path. By extending the angular as circumferential extent of the scroll flow path downstream of the fan impeller ANC structure can be located in/on the scroll while being located a sufficient distance downstream of the impeller. The flow path length can be increased without increasing the cubage of the scroll and, if desired, a further flow path increase can be achieved by a combination of the reduced rate of radial expansion together with increasing the cubage.
摘要:
A refrigerated case includes a body having a left and a right side, a top, and a back. A refrigerated compartment is located within the body. A number of shelves are within the refrigerated compartment. A base compartment is below the refrigerated compartment. A dividing wall separates the base compartment from the refrigerated compartment. A refrigeration module is located within the base compartment. A support member intermediate to the left and right sides supports the shelves. A transverse beam supports the support member.
摘要:
The display space of a multiple door display merchandiser is illuminated by one or more vertically extending lamps (80) disposed intermediate the vertical sides of an access opening to the display space. A multiple door assembly (44) covers the access opening. To enhance the illumination of the display space, a pair of vertically extending side reflectors (92) are provided, one extending along one side of the access opening and the other extending along the other side of the access opening. An additional reflector may be mounted to an interior facing surface of the door along an upper front region of the door and/or a lower front region.
摘要:
A screw compressor is provided with a discharge chamber that receives alternating flows of compressed fluid from two compression chambers located on opposed sides of the screw compressor. The discharge chamber is provided with a central baffle plate separating the two flows. The baffle plate changes the fluid frequency of the system, and ensures that the fluid system will not operate at a frequency that approaches the natural frequency of the overall compressor, thus reducing undesirable vibrations. The baffle plate also reduces the magnitude of the fluctuations and the resultant noise.
摘要:
A plug or plenum fan is located near two walls of the plenum such that they tend to act as the scroll for the fan. Additionally, a partition separates the fan from an adjacent corner further enhancing the formation of a scroll while providing a flow passage and a location for at least a part of the active noise control structure.
摘要:
A split air conditioner unit having a distributor located indoors for delivering refrigerant to a plurality of evaporator flow circuits. The distributor is connected to an outdoor condenser by a refrigerant line containing an expansion device. A strainer is located at the entrance to the distributor that homogenizes the expanded two phase mixture so that refrigerant of equal quality is delivered to each of the evaporator flow circuits.
摘要:
Two microphones spaced along a duct of an air conditioning system provide inputs to circuitry whereby the noise being generated is distinguished from reflected noise. The circuitry imposes a time delay corresponding to the time required for generated noise to pass from the upstream microphone to a canceling speaker. The canceling speaker is driven by the circuitry, subject to the time delay, such that noise at the speaker is canceled by the appropriately driven speaker. In a preferred embodiment movement of the speaker is sensed whereby the actual sound being produced can be compared with the sound required by the canceling speaker driving signal.
摘要:
A refrigeration apparatus having an evaporator fan motor control includes an evaporator to remove heat energy from the air in a cooled storage space. The evaporator transfers the heat energy to a refrigerant. At least one evaporator fan moves air from the cooled storage space across the evaporator to improve the transfer of heat energy into the refrigerant. The one or more evaporator fans have an energy consumption and generate a waste heat energy. A refrigeration control unit at least controls the operation of the one or more evaporator fans. During an off mode, the one or more evaporator fans are operated in a reduced energy consumption mode to reduce the energy consumption of the one or more evaporator fans and to reduce the waste heat while still defrosting the evaporator in the off mode.
摘要:
The display space of a multiple door display merchandiser is illuminated by one or more vertically extending lamps (80) disposed intermediate the vertical sides of an access opening to the display space. A multiple door assembly (44) covers the access opening. To enhance the illumination of the display space, a pair of vertically extending side reflectors (92) are provided, one extending alon one side of the access opening and the other extending along the other side of the access opening. An additional reflector may be mounted to an interior facing surface of the door along an upper front region of the door and/or a lower front region.