Refrigerating, heating and water heating unit with three heat exchangers connected in series in same loop

Abstract

The invention discloses a refrigerating, heating and water heating unit with three heat exchangers connected in series in the same loop. The refrigerating, heating and water heating unit with the three heat exchangers connected in series in the same loop is characterized in that a refrigerant circulation loop is additionally provided with a water heat exchanger assembly which is composed of two water heat exchangers and four one-way valves, and water channels of the water heat exchanger assembly are connected in series; according to the refrigerant loop connection manner, a compressor is connected with an air inlet of a four-way valve, and then the loop is divided into two branches at the left connector of the four-way valve; according to the first branch, the left connector is connected with the first water heat exchanger, and the first water heat exchanger is connected with an inlet of a first one-way valve in series; according to the second branch, the left connector of the four-way valve is connected with an outlet of a second one-way valve, the second branch then sequentially passes through a parallel connector between the outlet of the first one-way valve and the inlet of the second one-way valve, an indoor air heat exchanger, a throttle, an outdoor draught fan and an outlet of a third one-way valve, and the outlet of the third one-way valve is connected with an inlet of a fourth one-way valve in parallel; after an inlet of the third one-way valve is connected with the outdoor air heat exchanger, an outlet of the fourth one-way valve, a right connector of the four-way valve, a middle connector of the four-way valve, a gas-liquid separator and the compressor are connected; the water side of the water heat exchanger assembly, a hot water storage tank and a circulation water pump constitute a bath hot water circulation loop; and through control over starting and stopping of the indoor draught fan, the outdoor draught fan and the circulation water pump, hot air or hot water can be generated during heat pump circulation, and during refrigeration circulation, cool air can be generated or the machine is used as an air conditioner and also used for generating hot water. The refrigerating, heating and water heating unit with three heat exchangers connected in series in the same loop is simple in structure, the amount of the circulation refrigerant is stable, and the energy-saving effect is good.

Description

technical field [0001] The invention relates to the technical field of air conditioning / heat pump heating and hot water systems. Background technique [0002] With the improvement of people's living standards, while meeting the needs of indoor heating, air conditioning and hot water supply, energy saving and low-carbon environmental protection are also required as much as possible. The multi-functional heat pump water heater unit is the most suitable equipment and is also the most popular research topic at present. , There are also many patents, including the applicant who has also applied for and been authorized many patents on multifunctional hot water heat pumps, but because the refrigerant is a multi-circuit system, manufacturers still encounter difficulties in the production process. In the current cold and warm water fans, the refrigerant circulates between the air heat exchanger and the water-cooled heat exchanger, and the direction of the refrigerant circulation is s...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the complex refrigerant circuit of the existing multifunctional heating and air conditioning hot water heat pump, retain the advantages of the existing cold water air conditioner with simple structure and refrigerant circulation in a single circuit, and make up for the inability to organize refrigeration and air conditioning while making hot water for bathing , to better utilize the energy-saving effect of the heat pump. The present invention proposes a three-heat exchanger series-connected heating and cooling water unit. By improving the refrigerant circulation system of the cold water air conditioner, the heat pump cycle can be used to produce hot water for heating in winter. In summer, the four operating modes of making hot water for bathing while making air-conditioning and cooling, separately making air-conditioning and cooling, and making hot water for bathing all year round, so as to realize the three-purpose purpose of heating, air-conditioning and making hot water for bathing

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