A Central Cooling and Heating System for Canteens Based on Vapor Compression Heat Pump Technology

Abstract

The invention relates to a centralized cooling and heating system for canteens based on vapor compression heat pump technology, which mainly includes compressors, outdoor heat exchangers, indoor condensers, canteen heating equipment, canteen cooling equipment, oil fume purifiers, casing type Heat exchangers, evaporators in refrigerators, evaporators in air conditioners, etc. Compared with the prior art, the present invention can significantly increase the heat production of the system and meet the heating demand of the canteen in winter. In winter, the central heating system is adopted, and the vapor compression heat pump technology is used to recover the waste heat from kitchen exhaust, which greatly improves the heating efficiency. At the same time, the capillary heat exchanger is used to improve the heat utilization efficiency of the terminal. In summer, a central cooling system is adopted to meet the cooling demand of the canteen and avoid heat dissipation from the refrigerator in the storage room to the room. The system has high efficiency, remarkable energy-saving effect, and fully considers the heating and cooling requirements of the cafeteria. It has many functions, flexible configuration, and strong practicability.

Description

technical field [0001] The invention relates to a cooling and heating system, in particular to a canteen centralized cooling and heating system based on vapor compression heat pump technology. Background technique [0002] Large canteens are important places where energy is intensively consumed. In addition to cooking, a large amount of gas is required. In order to maintain the freshness and taste of ingredients and ensure a comfortable dining environment, heating and cooling consume a lot of energy, but the energy utilization efficiency of canteens is not high. [0003] In winter, there are many places in the canteen that need heating. First of all, it is the heat preservation of meals. In order to maintain the taste and health requirements of the meals sold in the canteen, it is necessary to continuously heat and keep them warm. The existing heat preservation devices are electric heating food insulation boards and incubators. Because the food requires a long time to keep ...

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Problems solved by technology

Chinese patent CN102840711A proposes to use a large amount of low-temperature washing wastewater in work and life to improve cooling efficiency in summer, but due to unstable water volume and more sewage impurities, it will cause corrosion and other damage to heat extraction equipment, and there is less low-temperature wastewater in the canteen in summer

[0009] 3. Use of hot water: After the tap water is heated in the Chinese patent CN 102840711A, it is only proposed to be used as domestic water and air-conditioning water, and no special purpose is specified. A large water storage tank is required to store hot water that cannot be used in time, which takes up space. There is still the problem of heat loss in the actual application process

[0010] 4. Cooling: Chinese patent CN 102840711A uses a freezer to freeze or refrigerate items, but the freezing function will greatly reduce the evaporation temperature of the system, causing system performance attenuation, and refrigeration means that there are multiple evaporation temperatures in a system, the system The difficulty of control is greatly increased, which is not conducive to the implementation of the plan

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