A kind of coiled condensing heat exchanger
Technical field
The utility model relates to water tank technical field, is specifically related to a kind of coiled condensing heat exchanger.
Background technology
The utility model relates to a kind of condensing heat exchanger of heat pump water box, especially, relates to and in one, soaks coiled condensing heat exchanger.
At present, the critical piece of household heat pump water heater--condensing heat exchanger mostly adopt be soaked in inner water tank in soak spiral coil mode, as shown in Figure 1, by 11 inner bag upper covers; 12 inner bag ladle bodies; 13 inner bag low heads; 21 outlet pipes (mouth); 22 oral siphons (mouth); 41 spiral coil condensers; 42 working medium outlet pipe; 43 working medium enter the compositions such as pipe.In the time that heat pump moves, the cold water that in condenser, the working medium heat energy of circulation is transmitted to coil pipe outer surface and is contacted with it by heat, then be transmitted to gradually outer field cold water; Can be accompanied by during this time the internal convection heat exchange causing because of the temperature difference of water on a small quantity.Prepare after hot water, in the time that user uses, open radiator drain stop valve, by the pressure of water route pipe network, cold water is injected to inner bag from water inlet, and hot water is extruded to inner bag for user from outlet pipe.
The condensing heat exchanger of version like this, because coil pipe total length is longer, generally reaches tens of rice (more than 30 meters), causes whole coil pipe height higher, approaches inner bag height approximately 70%.This tactic pattern causes two problems.
The one, when system in water tank without the static heating process of Inlet and outlet water in time, whole inner bag top and the bottom water temperature is substantially in even propradation, because of the upper current downflow that the temperature difference causes little.According to heat pump principle, after cold hot-side temperature is determined, the efficiency (Energy Efficiency Ratio COP) of heat pump depends on the surface coefficient of heat transfer of heat exchanger, and this coefficient is along with the water temperature cold warm end temperature difference causing that rises reduces and reduces.So the condensing heat exchanger of this version its efficiency in a quiescent operation process reduces gradually.
The 2nd, when system in user use in hot water process, while existing in the dynamic heat process of Inlet and outlet water, cause because system effectiveness is lower and fail to prepare in time user and require the hot water of temperature, cause system to continue the indifferent of hot-water supply, water tank water rate is low.
Therefore,, for existing problems of the prior art, need badly and provide the technology of the coiled condensing heat exchanger that a kind of efficiency of heating surface is high to seem particularly important.
Summary of the invention
The purpose of this utility model is to avoid weak point of the prior art and the coiled condensing heat exchanger that a kind of efficiency of heating surface is high is provided.
Goal of the invention of the present utility model is achieved through the following technical solutions:
A kind of coiled condensing heat exchanger is provided, comprise the coil pipe being arranged in inner bag, described coil pipe is that multilayer forms by heat exchanger tube along the radial level winding of inner bag, described heat exchanger tube is provided with working medium entrance and sender property outlet, described working medium entrance is arranged at outermost layer, described sender property outlet is arranged at innermost layer, and described heat exchanger tube is set to the multilayer threaded coiler of coiling from outside to inside.
Wherein, the heat exchanger tube of arbitrary layer is embedded at the recess of the interlamellar spacing of adjacent one deck heat exchanger tube.
Wherein, the winding direction of the winding direction of the heat exchanger tube of odd-level and the heat exchanger tube of even level is identical.
Wherein, the trend of the winding direction of the winding direction of the heat exchanger tube of odd-level and the heat exchanger tube of even level is contrary.
Wherein, described heat exchanger tube is arranged at described inner bag bottom.
Wherein, described set of heat exchange tubes is made up of a heat exchanger tube winding.
The beneficial effects of the utility model:
A kind of coiled condensing heat exchanger, comprise the coil pipe being arranged in inner bag, described coil pipe is that multilayer forms by heat exchanger tube along the radial level winding of inner bag, described heat exchanger tube is provided with working medium entrance and sender property outlet, described working medium entrance is arranged at outermost layer, described sender property outlet is arranged at innermost layer, and described heat exchanger tube is set to the multilayer threaded coiler of coiling from outside to inside.
In order to reduce to greatest extent coil pipe whole height, under the limiting parameter conditions such as inner bag inner diameter D, coil pipe total length L, coil pipe outer diameter D p, innermost layer spiral internal diameter Di, helix pitch Dc, interlamellar spacing Dl, the method for designing of the maximum numbers of plies that can arrange in employing inner bag inner diameter D calculates total number of plies Lmax, every layer of benchmark number of turns C and can be C, (C+1) or the each layer of number of turns (C-1) by optimizing and revising rear value.
In coil pipe manufacturing process, after pipe positioning winding is formed to ground floor coil pipe, at this positioning winding second layer coil pipe above ground floor coil pipe, make second layer coil pipe be entrenched in the recess between the pipe of above-mentioned ground floor coil pipe outer surface with interlamellar spacing Dl, after, same method, at second layer coil pipe upper surface, the 3rd layer of coil pipe of positioning winding, the 4th layer of coil pipe of the 3rd layer of coil pipe upper surface positioning winding and form multilayer coil pipe.Wherein, coil winding direction strange, even level is identical, trend is contrary.The coil pipe designing has like this utilized inner bag radial space as much as possible, and coil pipe height is down to minimum.
Brief description of the drawings
The utility model is described in further detail to utilize accompanying drawing, but embodiment in accompanying drawing does not form any restriction of the present utility model.
Fig. 1 is the structural representation of prior art of the present utility model.
Fig. 2 is the structural representation of coil pipe of the present utility model.
Fig. 3 is the generalized section of coil pipe of the present utility model.
Fig. 4 is the structural representation of another angle of coil pipe of the present utility model.
Fig. 5 is the mounting structure schematic diagram of coil pipe of the present utility model.
In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, include:
1---coil pipe, 2---working medium entrance, 3---sender property outlet, 4---heat exchanger tube, 5---inner bag.
Detailed description of the invention
With the following Examples the utility model is described in further detail.
Embodiment 1
A kind of coiled condensing heat exchanger, as Fig. 2, Fig. 3, Fig. 4, Fig. 5 comprise the coil pipe 1 being arranged in inner bag 5, described coil pipe 1 is that multilayer forms by heat exchanger tube 4 along the radial level winding of inner bag 5, described heat exchanger tube 4 is provided with working medium entrance 2 and sender property outlet 3, described working medium entrance 2 is arranged at outermost layer, described sender property outlet 3 is arranged at innermost layer, and described heat exchanger tube 4 is set to the multilayer threaded coiler 1 of coiling from outside to inside.
In order to reduce to greatest extent coil pipe 1 whole height, under the limiting parameter conditions such as inner bag 5 inner diameter D, coil pipe total length L, coil pipe outer diameter D p, innermost layer spiral internal diameter Di, helix pitch Dc, interlamellar spacing Dl, the method for designing of the maximum numbers of plies that can arrange in employing inner bag 5 inner diameter D calculates total number of plies Lmax, every layer of benchmark number of turns C and can be C, (C+1) or the each layer of number of turns (C-1) by optimizing and revising rear value.
In coil pipe 1 manufacturing process, after pipe positioning winding is formed to ground floor coil pipe 1, at this positioning winding second layer coil pipe 1 above ground floor coil pipe 1, make second layer coil pipe 1 be entrenched in the recess between the pipe of above-mentioned ground floor coil pipe 1 outer surface with interlamellar spacing Dl, after, same method, at second layer coil pipe 1 upper surface, the 3rd layer of coil pipe of positioning winding the 4th layer of coil pipe 1 of 1, the three layer of coil pipe, 1 upper surface positioning winding and form multilayer coil pipe 1.Wherein, coil pipe 1 winding direction strange, even level is identical, trend is contrary.The coil pipe 1 designing has like this utilized inner bag 5 radial space as much as possible, and coil pipe 1 is highly down to minimum.
Concrete, the heat exchanger tube 4 of arbitrary layer is embedded at the recess of the interlamellar spacing of adjacent one deck heat exchanger tube 4.
Adopt aforesaid way to use heat exchanger tube 4 coilings for coil pipe 1 can farthest increase the surface area of heat exchanger tube 4, reduce the height of coil pipe 1 simultaneously.
The winding direction of heat exchanger tube 4 of odd-level is identical with the winding direction of the heat exchanger tube of even level 4.
The trend of the winding direction of heat exchanger tube 4 of odd-level and the winding direction of the heat exchanger tube of even level 4 is contrary.
Described heat exchanger tube 4 is arranged at described inner bag 5 bottoms.
Wherein, 4 groups of described heat exchanger tubes are made up of heat exchanger tube 4 windings.
When system works, the heat exchange of the feedwater side in condenser is limited in inner bag 5 bottoms short as far as possible a section (hypomere), causes this section of water temperature to rise as quickly as possible, thereby forms the temperature difference large as far as possible with epimere water temperature.
The large temperature difference of inner bag 5 upper-lower section water temperatures is accelerated the convection current of inner bag 5 internal water, forms the reciprocal convection circulation that high-temperature water rises, water at low temperature declines.
This convection circulation process always with the mode of the maximum convection current temperature difference last till inner bag 5 water be heated to design temperature after system quit work and finish gradually.
For the condenser coil 1 with identical total length, if while being positioned over inner bag 5 bottom its highly lower the water by directly conduction heat exchange more with it, water temperature rises faster, and then the temperature difference forming with the water on inner bag 5 tops is larger, causes the convection current up and down of inner bag 5 water faster.In static heating process, always can ensure that the maximum condensation temperature difference is formed at inner bag 5 bottoms, thus the duty of guarantee system in peak efficiency.In dynamic heat process, the hot water on inner bag 5 tops is released use with given pace, from the supplementary cold water in inner bag 5 bottoms enters inner bag 5 with same speed, heated rapidly with the maximum condensation temperature difference, thereby ensured that system effectiveness is the highest, heating capacity is the strongest, and then ensured that water tank water rate is the highest.
In addition, for more high-power heat pump, because condenser coil 1 needs correspondingly significantly increase heat exchange area and significantly increase coil pipe 1 total length, thereby cause pipeline long and occur the problems such as heat exchange efficiency significantly reduces, pressure at expulsion increase even causing difficult design.Multilayer coil pipe 1 of the present utility model can get up each layer of branch circuit parallel connection by the method for shunting, and the one way branch road of formation only has coil pipe 1 total length part, addresses this problem thereby can be divided into effectively.
Finally should be noted that; above embodiment is the restriction in order to the technical solution of the utility model to be described but not to the utility model protection domain only; although the utility model is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.