Carbon-dioxide-combined-type heat pump hot water and air conditioning system and control method thereof

A carbon dioxide, heat pump hot water technology, applied in air conditioning systems, refrigerators, heating methods, etc., can solve the problems of heating capacity and heating efficiency attenuation, low thermal efficiency, and high system pressure, achieving obvious advantages in energy conservation and environmental protection, and good environmental performance. , the effect of high heat pump efficiency

CN107328102APending Publication Date: 2017-11-07CHINA YANGZI GRP CHUZHOU YANGZI AIR CONDITIONERCO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-11-07

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Abstract

The invention discloses a carbon-dioxide-combined-type heat pump hot water and air conditioning system and a control method thereof. The system consists of a carbon dioxide heat pump unit, a freon circulation unit and a water storage box, wherein the carbon dioxide heat pump unit adopts carbon dioxide as a refrigerating agent and forms a first heat pump circulation loop; and the freon circulation unit adopts freon as a refrigerating agent, and a gateable second heat pump circulation loop, a heat pump and refrigeration circulation loop and a refrigeration air conditioning circulation loop are formed by utilizing a four-way valve and each switching valve. By adopting the carbon-dioxide-combined-type heat pump hot water and air conditioning system and the control method thereof, different working modes of heating, cooling and hot water supplying can be realized in a wide temperature zone in the whole year; and stable, reliable and energy-saving operation of the system is ensured.
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Description

technical field

[0001] The invention relates to the technical field of refrigeration and air conditioning, and in particular to a heat pump hot water and air conditioning system combined with a carbon dioxide heat pump unit and a Freon heat pump air conditioning unit and a control method thereof. Background technique

[0002] Coal-fired heating and domestic hot water are widely used in North China and northern regions in winter. Coal-fired coal produces a large amount of dust and sulfur dioxide and other harmful gases. It is imminent to use clean heating and domestic hot water production methods. Air energy heat pumps are characterized by their high efficiency and environmental protection Factors such as friendliness and ease of use are valued, especially in rural areas without central heating.

[0003] Conventional air energy heat pumps use freon refrigerants, which are restricted by their thermophysical properties. At temperatures below -15°C, the heating capacity and heat...

Examples

Embodiment Construction

[0036] see figure 1 In this embodiment, the carbon dioxide compound heat pump hot water and air conditioning system is composed of a carbon dioxide heat pump unit, a fluorine circulation unit and a water storage tank 20;

[0037] The carbon dioxide heat pump unit uses carbon dioxide as the refrigerant, the first heat exchanger 4 is arranged in the outlet pipeline of the carbon dioxide refrigeration compressor 1, and the first outdoor heat exchanger 2 is arranged in the inlet pipeline of the carbon dioxide refrigeration compressor 1. The first throttling valve 3 is set between the first heat exchanger 4 and the first outdoor heat exchanger 2 to form the first heat pump circulation loop; the fluorine circulation unit uses Freon as the refrigerant, using the four-way valve 11 and each The valves constitute the following optional circulation loops:

[0038] The second heat pump circulation circuit: from the outlet port of the compressor 10 through the first port and the second po...