Cascade heat pump cycle system and control method
A circulation system and heat pump technology, applied in the field of heat pumps, can solve problems such as poor energy efficiency of cascade cycles
Pending Publication Date: 2021-10-22
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Problems solved by technology
[0005] The embodiment of the present invention proposes a cascade heat pump cycle system to solve the technical problem of poor energy efficiency of the cascade cycle in the prior art
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[0031] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0032] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more.
[0033] In the description of this applicat...
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The invention discloses a cascade heat pump cycle system and a control method. The cascade heat pump cycle system comprises a first-stage refrigerant cycle loop and a second-stage refrigerant cycle loop, wherein the first-stage refrigerant cycle loop comprises an evaporative condenser and a first-stage condenser; the first-stage refrigerant cycle loop is used for performing heat exchange with water flowing through the first-stage condenser based on a first refrigerant and / or used for performing heat exchange with a second refrigerant flowing through the evaporative condenser based on the first refrigerant; the second-stage refrigerant cycle loop comprises the evaporative condenser and a second-stage condenser; the second-stage refrigerant cycle loop is used for absorbing heat transferred by the first refrigerant from the evaporative condenser based on the second refrigerant and transferring heat to water flowing through the second-stage condenser based on the second refrigerant; The cascade heat pump cycle system further comprises a water cycle loop. The cascade heat pump cycle system can be used for preparing medium-temperature water based on the first-stage refrigerant cycle loop and preparing high-temperature water based on the first-stage refrigerant cycle loop and the second-stage refrigerant cycle loop, thereby improving the efficiency of preparing the high-temperature water. Therefore, the energy efficiency of the cascade heat pump cycle system is improved on the basis that the outlet water temperature is increased.
Description
technical field [0001] The present application relates to the technical field of heat pumps, and more specifically, to a cascaded heat pump cycle system and a control method. Background technique [0002] In the past two years, the heat pump hot water system has become more popular in the industry. The main reason is that the country has introduced the historical goals of carbon peak and carbon neutrality. Boilers and electric heating have huge advantages such as environmental protection and energy saving, so they have received extensive attention in the industry. [0003] However, traditional air source heat pumps also have some restrictions on their use. For example, the maximum heating temperature can only reach 60°C, which can meet most of the domestic hot water and winter heating needs, but for hospitals, food and hotels where high-temperature water is used more In the application scenario, it is still impossible to directly produce high-temperature hot water at 80-90°...
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IPC IPC(8): F25B7/00F25B49/02
CPCF25B7/00F25B49/02
Inventor 李东哲傅华王远鹏夏兴祥陈卫星
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST