Heat pipe type heat exchanger for heat pump water heater

Abstract

The invention relates to a heat exchanger, in particular to a heat pipe type heat exchanger for a heat pump water heater. The heat pipe type heat exchanger comprises a hot water tank and a refrigerant box, wherein the refrigerant box is arranged on the lower side, the hot water tank is arranged on the upper side, and the refrigerant box is mutually isolated from the hot water tank and is not communicated with the hot water tank; a plurality of inverted U-shaped tubes are arranged in the hot water tank; the lower tube orifices of the inverted U-shaped tubes are communicated with the refrigerant box; the hot water tank is provided with hot water; a heat exchanging coil is arranged in the refrigerant box; the refrigerant box is vacuated; and the refrigerant box is provided with a secondary refrigerant. The secondary refrigerant, a refrigerant and the hot water transfer heat in a forced convection mode, so that the efficiency is greatly higher than that of natural convection heat transfer, the used heat exchanging materials can be reduced, the volume of the hot water tank is reduced, the temperature difference of heat transfer can be reduced, and the energy efficiency ratio of a system is improved. Meanwhile, the heat exchanging coil is arranged in the refrigerant box, so that the risk that the refrigerant in the heat exchanging coil directly leaks into the hot water is low, and the heat exchanger is more safe and reliable.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a heat pipe heat exchanger used in a heat pump water heater. Background technique [0002] A heat pump water heater is a device that transfers heat from a low-temperature object to high-temperature water through a medium to obtain hot water. Water flows from a high place to a low place, and heat is transferred from a high temperature object to a low temperature object, which is a natural law. However, in real life, for the needs of agricultural irrigation, domestic water, etc., people use water pumps to send water from low places to high places; similarly, in order to meet the needs of domestic hot water, people use heat pump water heaters to send heat from low-temperature places To high temperature for human use. When the heat pump water heater is working, the refrigerant absorbs heat from the low-temperature environment, and heats the water in the water tank after raising the temperature. ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of high efficiency and low cost of existing heat exchangers, and to invent a heat pipe heat exchanger for heat pump water heaters that transfers heat through forced convection

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