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Ultralow-temperature heat pump system used for heating and control method thereof

A heat pump system and technology of the pump system are applied in the ultra-low temperature heat pump system and its control field, which can solve the problems of performance attenuation and the like, and achieve the effect of improving the operation performance, maintaining the performance, and running safely and reliably.

Pending Publication Date: 2016-12-07
燕园德普科技(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the heat pump water supply system in the prior art has serious performance attenuation at low ambient temperature, thereby providing an ultra-low temperature heat pump system for heating and its control method

Method used

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  • Ultralow-temperature heat pump system used for heating and control method thereof

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Embodiment Construction

[0030] Such as figure 1 As shown, the present invention provides an ultra-low temperature heat pump system for heating, which includes a cascaded first heat pump system and a second heat pump system, wherein the first heat pump system is a high-temperature stage, which includes a first compressor 11. Condenser 12 and first throttling device 13; the second heat pump system is a low-temperature stage, which includes a second compressor 21, a gas cooler 22, a high-pressure evaporator 23 and a second throttling device 24;

[0031] The first heat pump system and the second heat pump system are stacked together through the evaporative condenser 3, wherein the first heat pump system evaporates and absorbs heat through the evaporative condenser 3, and the second heat pump system through the evaporative condenser 3 The evaporative condenser 3 cools and releases heat (that is, the first heat pump system and the second heat pump cycle system share the evaporative condenser 3).

[0032] ...

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Abstract

The invention provides an ultralow-temperature heat pump system used for heating and a control method thereof. The ultralow-temperature heat pump system comprises a first heat pump system and a second heat pump system connected with the first heat pump system in an overlapping mode. The first heat pump system is at a high-temperature grade, and comprises a first compressor (11), a condenser (12) and a first throttling device (13). The second heat pump system is at a low-temperature grade, and comprises a second compressor (21), a gas cooler (22), a high-pressure evaporator (23) and a second throttling device high-pressure evaporator (24). The first heat pump system and the second heat pump system are overlapped and combined together through an evaporative condenser (3). The first heat pump system absorbs heat through the evaporative condenser (3), and the second heat pump system exhausts heat through the evaporative condenser (3). By adoption of the ultralow-temperature heat pump system used for heating and the control method thereof, the defect that a heat pump heating system in the prior art is severe in performance degradation under a low-temperature environment, especially under an environment with the temperature being -25 DEG C or below can be overcome; the system is made to be stable in performance, degradation is not prone to occurring, and the energy efficiency of the system can be maintained at a high level all the time.

Description

technical field [0001] The invention belongs to the technical field of thermal energy conversion and utilization, and in particular relates to an ultra-low temperature heat pump system for heating and a control method thereof. Background technique [0002] Most heat pump water supply systems in the prior art use air-source or water-source heat pump water heaters (also known as air-energy or water-energy water heaters), which usually absorb low-temperature heat from the air or water, and then heat up and pressurize after being compressed by a compressor. Then through the heat exchanger, the feed water is converted to heat, and the high-temperature heat energy after compression is used to heat the cold water to raise its temperature so as to achieve the purpose of producing hot water. However, if the outdoor ambient air temperature is low, the mass flow rate of the refrigerant in the air source heat pump evaporator will drop to a very low value, resulting in a limited amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B7/00F25B49/02F25B41/04F25B41/20
CPCF25B7/00F25B49/02F25B41/20
Inventor 田幼华
Owner 燕园德普科技(北京)有限公司
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