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CO2 cascade heat pump system suitable for extremely cold areas and control method thereof

A heat pump system and heat pump refrigeration technology, which are applied in the operation mode of the machine, the combination of heating and cooling, and the refrigerator, etc., can solve the problem of lack of secondary utilization of energy, and achieve the effect of secondary utilization.

Inactive Publication Date: 2017-05-10
刘勇
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cascade heat pump system and its control method to solve the existing CO 2 The energy consumed in the cascade heat pump system can only be used for heating without the technical problem of secondary utilization of energy

Method used

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  • CO2 cascade heat pump system suitable for extremely cold areas and control method thereof
  • CO2 cascade heat pump system suitable for extremely cold areas and control method thereof
  • CO2 cascade heat pump system suitable for extremely cold areas and control method thereof

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Embodiment Construction

[0025] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention discloses a CO2 cascade heat pump system suitable for extremely cold areas and a control method thereof, and relates to the technical field of heat pumps. The technical problem that the energy source consumed in the existing CO2 cascade heat pump system cannot be used for heating and secondary utilization of the energy is absent is solved. The CO2 cascade heat pump system suitable for extremely cold areas comprises a carbon dioxide heat pump refrigeration cycle and an ordinary heat pump refrigeration cycle, wherein the ordinary heat pump refrigeration cycle comprises a first capillary, an ice machine and an evaporative condenser, which are arranged in sequence, the evaporative condenser is communicated with a first compressor through a reserving valve, and the first compressor sequentially is communicated with a heat exchanger and the first capillary through a reserving valve. Because the ice machine is arranged between the first capillary and the evaporative condenser in a high temperature segment circulation process, the CO2 cascade heat pump system suitable for extremely cold areas can realize an ice making function while heating, thereby effectively realizing the secondary utilization of the energy.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a CO 2 Cascade heat pump system and control method thereof. Background technique [0002] A heat pump is a device that can transfer heat energy from a low-level heat source to a high-level heat source. Usually, it first obtains low-grade heat energy from natural air, water or soil, and then provides high-grade heat energy that can be used by people. . [0003] Specifically, CO 2 The cascade heat pump system can be mainly used for heating. It has two sets of circulation systems, one is the gas circulation in the low-temperature section through carbon dioxide, and the other is the liquid circulation in the high-temperature section through Freon, etc., and the two circulation systems It can be connected together through the evaporative condenser, and the effect of heat exchange and heating can be realized when the evaporative condenser is in the heating condition. [0004] Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/00F25B29/00F25B41/00F25B41/04F25B41/20F25B41/40
CPCF25B9/008F25B29/00F25B2309/06F25B41/40F25B41/20
Inventor 刘勇
Owner 刘勇
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