Indoor air source double compressors household heat pump water heater

Abstract

The invention discloses a vapor compression heat pump water heater device with two compressors, which comprises at least two compressors, a radiator, a water tank, a throttling element, an indirect heat exchanger and an evaporator, wherein the compressor is connected with a heat pump cycle in parallel, the outlet end of each compressor is connected with the radiator, and the inlet end of each compressor is connected with the evaporator; the radiator is arranged in the water tank and connected with the throttling element through a pipeline, and the throttling element is communicated with the evaporator through the pipeline. When the rapid hot water isn't required, the heat pump cycle is operated by one of the compressors, which namely realizes the energy-saving purpose of higher energy efficiency ratio; when the indoor air source is used in winter, the obvious change of distribution of the indoor air temperature field isn't caused; when used in summer, the indoor local temperature drop can be caused, which plays a role in cooling a room; the invention can control noises, and can't bring the overlarge noises if used in the room.

Description

technical field [0001] The present invention relates to a vapor compression heat pump hot water system, especially a vapor compression heat pump system using double or multiple compressors. The refrigerant evaporates in the evaporator and absorbs heat from the air source. The system can be used outdoors or indoors The air source is used as a heat source and can be used in domestic heat pump water heater installations. Background technique [0002] In the heat pump cycle of the existing domestic vapor compression air source heat pump water heater (see Figure 1), the refrigerant is compressed by the compressor and discharged into the radiator by the compressor to release heat to the high temperature heat source (water) and condense, and then When passing throttling elements (such as capillary tubes, expansion valves), the refrigerant is throttled, the pressure and temperature of the refrigerant are reduced, and then enters the evaporator, absorbs heat from the low-temperature ...

AI Technical Summary

Problems solved by technology

For a heat pump water heater with this structure, when the heat pump is running, especially when the compressor is a compressor with a fixed speed, the heating capacity of the heat pump is relatively difficult to be influenced and controlled artificially, and the noise is also difficult to control when the heat pump is running.

Moreover, for the air source heat pump water heater with this structure, part of the heat pump installation work is carried out outdoors, especially when it is installed in a high-rise building, the installation workers have certain safety risks, and the outdoor unit is not installed firmly and there is a risk of falling. The outdoor unit of the water heater also affects the appearance of the building where it is located, and even the entire macroscopic area

[0004] At present, the existing air source heat pump water heaters, the heat pump cycle is a single compressor cycle, there is no heat pump heat output control and noise control related content, the lack of research on these two aspects also restricts the heat pump operation can only use outdoor air source

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