Freeze prevention control method for heat pump water heater

A technology of a heat pump water heater and a control method, which is applied to fluid heaters, lighting and heating equipment, etc., can solve problems such as freezing of heat exchangers, icing, and lower water temperature, so as to avoid scrapping and have good versatility Effect

Active Publication Date: 2013-12-25
JIANGSU TENESUN ELECTRICAL APPLIANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when running in reverse, the system will absorb heat from the water, causing the water temperature to drop. At this time, if there is scaling or partial blockage inside the water heating heat exchanger, the water in some

Method used

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  • Freeze prevention control method for heat pump water heater
  • Freeze prevention control method for heat pump water heater

Examples

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[0031] Example

[0032] An antifreeze control method for a heat pump water heater uses a heat pump water heater with an antifreeze controller. The heat pump water heater with an antifreeze controller includes a first circuit and is connected to the first circuit The second circuit of the first circuit is connected to the compressor, the four-way valve, and the gas-liquid separator in turn, and finally returns to the compressor to form a circuit. The second circuit starts from the four-way valve and is connected to the condenser and heat preservation in sequence. Water tank, three-way valve, water pump, condenser, accumulator, expansion valve, evaporator, and finally back to the four-way valve. The heat pump water heater with an antifreeze controller further includes an antifreeze controller; a heatable heating cable is provided on the condenser; and one port of the three-way valve is connected with a drain valve.

[0033] The antifreeze controller detects that the ambient temperat...

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Abstract

The invention relates to a freeze prevention control method for a heat pump water heater, which uses the heat pump water heater with a freeze prevention controller. The freeze prevention control method is characterized by comprising the following steps of: (1) when the freeze prevention controller detects that the environment temperature is lower than 0 DEG C and the temperature inside a condenser is lower than 3 DEG C, starting a heat tape and a water pump, and when the freeze prevention controller detects that the temperature inside the condenser is higher than 10 DEG C, closing the heat tape and the water pump; and (2) when the freeze prevention controller detects that the water pump is in a closed state, the environment temperature is lower than 0 DEG C and the water inlet temperature is lower than 3 DEG C, starting the water pump, and when the freeze prevention controller detects that the water inlet temperature is higher than 15 DEG C, closing the water pump. According to the invention, when the heat pump water heater is in use in engineering, various information inside the heat pump water heater is identified and simultaneously, whether freeze prevention is carried out is accurately judged by the detected environment temperature, condenser temperature and water inlet temperature, so that freeze prevention and alarm work can be effectively done; and the freeze prevention control method can be matched with a random type of heat pump water heater to carry out freeze prevention and has good universality.

Description

technical field [0001] The invention relates to the field of household water heaters, more specifically, the invention relates to a heat pump water heater with an antifreeze function and an antifreeze control method for the heat pump water heater. Background technique [0002] After many years of market promotion, heat pump water heaters have been widely promoted in the northern market, and the energy-saving properties of the products have been recognized by users. [0003] However, after tracking and understanding the air source heat pump hot water units of different manufacturers in the market, it was found that many users reported that the heat pump hot water was not properly drained and antifreeze due to improper use, resulting in water side freezing and water immersion into the refrigerant system. As a result, the entire unit cannot be maintained, resulting in product scrapping and the like. Described breakdown has become the problem that user, distributor, heat pump f...

Claims

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Application Information

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IPC IPC(8): F24H9/20F24H9/18F24H4/02
Inventor 王玉军王天舒刘军季忠海杨奕
Owner JIANGSU TENESUN ELECTRICAL APPLIANCE
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