Heat pump unit

Abstract

The invention belongs to the technical field of heat exchange, and particularly provides a heat pump unit. The heat pump unit aims at solving the problem that an existing heat pump unit adopts a poormode for stably working at a low environment temperature and a high pressure ratio. Therefore, the heat pump unit provided by the invention comprises a main circulation loop and a liquid spraying pipeline communicating with the main circulation loop, wherein a compressor, a first heat exchanger, a throttling component and a second heat exchanger which communicate with each other are arranged on the main circulation loop. In the heating mode, the first heat exchanger is used as an evaporator; the second heat exchanger is used as a condenser; the throttling component is arranged between the first heat exchanger and the second heat exchanger; one end of the liquid spraying pipeline is connected with the compressor, and the other end of the liquid spraying pipeline is connected between the first heat exchanger and the throttling component, so that a cooled heat exchange medium can be introduced into the compressor; the evaporation temperature of the compressor can be effectively reduced; and the cost can be effectively reduced when the heat pump unit is enabled to stably work at the low environment temperature and the high pressure ratio.

Description

technical field [0001] The invention belongs to the technical field of heat exchange, and specifically provides a heat pump unit. Background technique [0002] With the continuous improvement of people's living standards, people have also put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an essential device in people's lives. Specifically, most of the existing high-power air-conditioning equipment uses heat pump units. In order to effectively ensure that the heat pump units can work stably under the condition of low ambient temperature and high pressure ratio, the existing heat pump units usually adopt the following two methods: one method is Configure a two-stage compression system for the heat pump unit, that is, use a low-pressure stage compressor and a high-pressure stage compressor to work together to ensure the compression function. However, this method requires m...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing heat pump unit has a poor way to work stably under the condition of low ambient temperature and high pressure ratio, the present invention provides a new heat pump unit , the heat pump unit includes a main circulation circuit and a liquid injection pipeline connected with the main circulation circuit; wherein, the main circulation circuit is provided with a compressor, a first heat exchanger, a throttling member and a second Two heat exchangers, in the heating mode, the first heat exchanger is used as an evaporator, the second heat exchanger is used as a condenser, and the throttling member is arranged between the first heat exchanger and the Between the second heat exchangers, one end of the liquid injection pipeline is connected to the compressor, and the other end of the liquid injection pipeline is connected between the first heat exchanger and the throttling member, so that the cooled heat exchange medium can be introduced into the compressor

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