CN201163097Y

CN201163097Y - Heat pump water heater with long service life

Info

Publication number: CN201163097Y
Application number: CNU2008200013800U
Authority: CN
Inventors: 爱德华·艾德里安·史密斯
Original assignee: AISHA TRADE ASSISTANCE Co Ltd
Current assignee: AISHA TRADE ASSISTANCE Co Ltd
Priority date: 2008-01-09
Filing date: 2008-01-09
Publication date: 2008-12-10
Anticipated expiration: 2018-01-09

Abstract

The utility model discloses a heat-pump type water heater with long service life, comprising a water tank of the water heater, a compressor, a fan, an evaporating coil, a condensing coil, a throttling device and a control device. The utility model is characterized in that: water tank of the water heater is a cylindrical water tank made of AISI444 ferritic stainless steel in the ASTM standard (USA) with two ends provided with an end enclosure respectively; a cylindrical shell is sleeved outside the water tank; and a heat insulating layer of a polyurethane foaming material is filled between the shell and the water tank. Moreover, the evaporating coil is made of a copper tube with a D-shaped cross section, wherein, one surface in the cross section attached with the water tank can be processed into a smooth surface matched with the shape of an external cylinder of the water tank; and a silicon coating with excellent heat conducting performance is coated between an abutted surface of the external cylinder of the water tank and the smooth surface. The water heater has the advantages of long service life, high efficiency, energy conservation, and favorability for environmental protection.

Description

Long-life heat pump water heater

Technical field

The utility model relates to a kind of air source heat pump type water heater.

Background technology

Existing water heater comprises electric heater, gas heater and solar water heater.In use the electric leakage accident takes place in electric heater sometimes, and the combustion gas intoxication accident takes place gas heater sometimes, causes the injures and deaths of the person and safety inadequately, and will consume the energy of high-quality.Though the solar water heater energy savings, its price height, the pipeline of high-rise building from the roof to user is long, and energy loss is big, is easy to generate corrosion of piping in the use, and influences the load of building and attractive in appearance and be restricted.In particularly southern rainy season, sunlight seldom makes it be difficult to bring into play its due effect sunshine.For the defective and the deficiency that overcome above-mentioned water heater, people have invented heat pump water heater, the patent No. be ZL200420081257.6, Granted publication number be exactly an example wherein for CN2733251Y, name are called " energy-saving heat pump formula water heater ".It is to utilize the low-grade energy that exists in the air, be used to heat domestic water after improving its energy grade by heat pump cycle, thereby can saves energy and gas energy, and have energy-efficient, safety and environmental protection, round-the-clock running, many advantages such as easy to use.

But, should " energy-saving heat pump formula water heater " have following several weak points

1, its water tank uses general metal material to make or uses common stainless steel material to make, and the heat conductivility of these materials is low, causes the efficient of water heater to reduce greatly;

2, in the long running, the common stainless steel water tank life-span is about 8 years, has to from newly purchasing new water heater because this material by the very fast corrosion of the chloride in the water, causes the damage of water tank, i.e. the life-span of its use is short;

3, evaporation coil is to be made by the metal tube of circle, and the contact-making surface that its cross section and shell are fitted is minimum, and heat transfer efficiency reduces greatly;

Summary of the invention

The purpose of this utility model is the deficiency that overcomes above-mentioned existing heat pump water heater, and a kind of long service life, consumes energy is few and efficient is high heat pump water heater are provided.

In order to realize above-mentioned purpose, can adopt following technical scheme: the water heater of this programme is the same with prior art, comprises water tank, compressor and fan, evaporation coil, condenser coil, throttling arrangement and the control device of water heater, and its improvement is:

The water tank of said water heater is a cylindrical water tank with the two ends band end socket of the making of the AISI444 ferritic stainless steel in the U.S. ASTM standard, is filled with the heat-insulation layer of Polyurethane expanded material between shell and water tank.

In order to realize above-mentioned purpose, can adopt following optimal technical scheme: the water heater of this programme is on the basis of technique scheme, wherein said evaporation coil is the copper pipe making of " D " shape by cross section, and the one side of fitting with water tank in its cross section is processed into the even surface that can closely match with the Outer cylindrical of inner bag; And coated has the good silicon coating of heat conductivility between the binding face of this even surface and water tank outside cylinder.

The beneficial effects of the utility model are:

1, because the material heat transfer efficiency height that water tank and evaporation coil are selected, and increase between the particular design of the cross section of evaporation coil and it and the inner bag specific coatings the heat transfer efficiency between evaporation coil and the water tank is improved greatly, thereby improved the efficient of water heater;

2, the long service life of water tank, thus make the twice of bringing up to the common stainless steel water tank service life of this water heater;

The utility model is more clear to be understood with being convenient in order to make, and below by drawings and Examples it is described further.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the utility model.

Fig. 2 is the A-A profile of Fig. 1.

Fig. 3 is inner bag among Fig. 1 and the structural representation between the evaporation coil binding face.

The specific embodiment

Embodiment 1, referring to Fig. 1, Fig. 2.Present embodiment comprises shell, water tank, compressor and fan, evaporation coil, condenser coil, throttling arrangement and the control device of water heater.Wherein the water tank of water heater is a cylindrical water tank 7 with the two ends band end socket of the AISI444 in the U.S. ASTM standard (being the SUS444 in the Japanese ZIS standard) ferritic stainless steel making, also be with a columniform shell 6 in the outside of this water tank 7, be filled with the heat-insulation layer 5 of Polyurethane expanded material between shell 6 and the water tank 7.

Embodiment 2, referring again to Fig. 3.Present embodiment is further to improve on the basis of the foregoing description and come, promptly evaporation coil 11 wherein is to be made for the copper pipe of " D " shape by cross section, and the one side of fitting with inner bag in its cross section is processed into the even surface 11 that can closely match with the Outer cylindrical of water tank 7; And coated has the good silicon coating of heat conductivility 18 between the binding face of this even surface 11 and water tank 7 outside cylinder, and this silicon coating can improve hot-fluid effectively and pass to heat transfer efficiency in the water tank from copper pipe.

Embodiment 3, referring again to Fig. 1.Present embodiment is on the basis of the foregoing description, and an auxiliary electric heating element 17 also is housed in water tank 7.In very cold zone, the adding of auxiliary electrical heater block can improve the operating efficiency of machine greatly.

In the above-mentioned accompanying drawing: fan 1, outer container top cover 2, protection network 3, compressor chassis assembly 4, heat-insulation layer 5, shell 6, water tank 7, outer container footing 8, control cabinet 9, condenser coil 10, compressor 12, fan driving motor 13, electric machine support 14, guidance panel 15, terminal box 16, electric heating element 17 is prior art, need not give unnecessary details at this.

Claims

1, a kind of long-life heat pump water heater comprises it is characterized in that water tank, compressor and fan, evaporation coil, condenser coil, throttling arrangement and the control device of water heater:

The water tank of said water heater is a cylindrical water tank with the two ends band end socket of the making of the AISI444 ferritic stainless steel in the U.S. ASTM standard, also be with a columniform shell in the outside of this water tank, between shell and water tank, be filled with the heat-insulation layer of Polyurethane expanded material.

2, long-life heat pump water heater according to claim 1, it is characterized in that said evaporation coil is to be made for the copper pipe of " D " shape by cross section, the one side of fitting with inner bag in its cross section is processed into the even surface that can closely match with the Outer cylindrical of inner bag; And between the binding face of this even surface and water tank outside cylinder, scribble the good silicon coating of heat conductivility.

3, long-life heat pump water heater according to claim 1 and 2 is characterized in that also being equipped with an auxiliary electric heating element in water tank.