Heat pump water heater

A heat pump water heater and water heater technology, which is applied to heat pumps, water heaters, indirect heat exchangers, etc., can solve the problems of lower heating capacity and energy efficiency ratio of heat pumps, lower heat exchange capacity of condensers, and high consumption of heat exchanger materials. Achieve the effect of improving market competitiveness, improving heat exchange capacity, simple and practical structure and process

Active Publication Date: 2010-09-22
A O SMITH CHINA WATER HEATER CO LTD
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the fluorine water heat exchangers used in the existing heat pump water heaters are all built-in or externally wound fluorine water heat exchangers with equal pipe diameters, and their heat transfer capacity is low
The reason is mainly because condensation heat transfer is a complex two-phase flow heat transfer. As the condensate increases, the liquid film between the wet steam and the tube wall gradually thickens, which becomes the main obstacle t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat pump water heater
  • Heat pump water heater
  • Heat pump water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The structure of the heat pump water heater of the present embodiment is as follows: Figure 5 As shown, it is a preferred embodiment of the invention: a small household heat pump water heater includes a heat pump system composed of a compressor, a variable diameter condenser, a throttling element, and an evaporator. Among them, the variable-diameter condenser composed of the front section heat exchange tube 1 and the rear section heat exchange tube 2 connected in series - the variable-diameter coil tube 8 is built in the hot water storage tank 9 (the condenser adopts single-way heat exchange instead of multi-way split flow), Among them, the inner diameter of the latter stage coil is smaller than that of the former stage, and the length is equivalent to that of the former stage.

[0021] When working, the refrigerant of the heat pump system enters the front heat exchange tube 1 from the refrigerant steam inlet 4, and flows out from the intake connecting pipe 3 outside t...

Embodiment 2

[0027] Another embodiment of the present invention is Image 6 As shown, the condensing and heat-exchanging coil 8 is wound around the outer wall of the inner tank 11 of the water tank 9 and is located in the insulation layer, so as to perform indirect heat exchange with the water in the inner tank, and the whole is kept insulated by the insulation layer.

[0028] Experiments have proved that after adopting this embodiment, the heat exchange capacity of the condensing side is also significantly improved, and the required heat exchange area is effectively reduced, thereby significantly saving materials and reducing manufacturing costs.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a heat pump water heater and belongs to the technical field of water heaters. The water heater comprises a heat pump system which consists of a compressor, a condenser, a throttling element, and an evaporator. The condenser is arranged on a water tank of the water heater to form a heat exchange structure; and the condenser consists of at least two sections of heat exchange tubes which are connected in series along the flow direction of a refrigerant, and the flow area of the front section of the heat exchange tube is more than that of the rear section of the heat exchange tube. Because the heat exchange capacity of the condenser is effectively improved, the heat pump performance can be effectively improved when the heat exchange area is the same; the heat exchange area and weight needed by the condenser are greatly reduced on the premise of guaranteeing good operating effect of the heat pump; the materials and processing cost thereof are effectively saved; and the structural dimension is reduced. Therefore, the reliability is improved; and due to the simpleness and practicality of the structure and technology, the cost is reduced, and the market competitiveness of the products is improved.

Description

technical field [0001] The invention relates to a heat pump water heater, in particular to an improved heat exchanger structure of the heat pump water heater, and belongs to the technical field of water heaters. Background technique [0002] Heat pump water heaters have a good energy-saving effect, so they have developed rapidly in recent years. In the static heating units widely used in small-capacity heat pump water heaters, the fluorine water heat exchanger is usually placed inside the hot water tank, and the high-temperature refrigerant steam passes through the exchange in the tube. The heat pipe heats the water body outside the pipe to the required temperature, and some products also use the condensing heat exchange pipe to wrap around the outer wall of the hot water tank to solve the corrosion problem of the built-in heat exchanger. At the same time, the fluorine water heat exchangers used in the existing heat pump water heaters are all built-in or externally wound flu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F24H4/04
CPCF28D20/0039F25B30/02F24H1/181F24H4/04F28F13/08F24H9/18F28F13/14F28D2020/0078Y02E60/142F28D7/024F24H1/18F24H1/208Y02E60/14
Inventor 张茂勇王建良
Owner A O SMITH CHINA WATER HEATER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap