CN100430665C

CN100430665C - Water heater/cooler

Info

Publication number: CN100430665C
Application number: CNB200480008475XA
Authority: CN
Inventors: R·史蒂文斯
Original assignee: Siddons Stevens Developments Pty Ltd
Current assignee: Raheem Australia Pty Ltd
Priority date: 2003-03-28
Filing date: 2004-03-24
Publication date: 2008-11-05
Anticipated expiration: 2024-03-24
Also published as: CN1768235A; AU2003901610A0

Abstract

The present invention discloses a water heater/cooler (10) having a water tank (12) with a wall (18) formed from material having heat transfer properties. A tube (24) which carries a refrigerant fluid is applied externally about tank wall (18). A heat-conductive material (32) is coextensive with the length of tube (24) to allow tube (24) to be in heat-conductive contact with tank wall (24). At least one layer of material (34, 36) is tightly wrapped about tank wall (18) and tube (24).

Description

Water heater/cooler

Technical field

The present invention relates to a kind of water heater/cooler, particularly, not exclusively relate to a kind of water heater and manufacture method thereof of solar boosted heat pump.

Background technology

A kind of solar boosted heat pump water heater has been described in the 582291st and No. 603510 Australian Patent, wherein the water pot of water heater along the part of its length by welding seaming or the fine weldering of fusion and the pipe of mechanical fixation centers on.Fill in the pipe refrigerant liquid with the surface that adds hot-water cylinder and thus heat packs be contained in water in the water pot.Keep when the welding tensioning state to reduce the possibility that the heat conductivity scolder splits in the expansion of pipe and water pot and the contraction process in use round the pipe of water pot.During being fixed to water pot, the fine weldering slurry of tin/lead/fusion acid is applied on the pipe, adds hot-water cylinder with melting solder subsequently in a heating furnace, thereby finishes the heat conduction welding between pipe and water pot.Pre-winding working procedure comprises: the polishing outer cylinder surface is to remove dirt, clean and final cleaning is beneficial to zinc-plated and the pipe that is under the stress is safeguarded with copper-bath, pre-winding working procedure has slowed down the manufacturing cycle, and, whole water pot is carried out the back heating causes further manufacturing time with melting solder loss.The water pot body is heated to expense and the time that the needed combustion gas of melt solder temperature and the thing followed have increased manufacturing process cool time considerablely.Cause further time delay and cost to increase owing to must clean water pot to remove residual soldering acid and to carry out pitch (bitumous) corrosion-resistant treatments.In addition, when pipe leaves the roller pipe and when being applied to, its allows pipe random distortion, manufacturing process to have dried up jar of approximately pipe deformation/tensioning apparatus of 600mm, and may cause the contact loss between water pot and the pipe.

Summary of the invention

Therefore, an object of the present invention is to provide a kind of water heater, it has improved the theory described in the Australian Patent the 582291st and No. 603510.

Another purpose of the present invention provides on a kind of structure than the simpler water heater of structure described in the 582291st and No. 603510 Australian Patent.

In view of these purposes of the present invention, the present invention provides a kind of water heater/cooler in one aspect, comprise: water pot with wall of making by thermally-conductive materials, in use be fit to contain the pipe that carries refrigerant liquid and be installed in the outside around described water pot wall, length breathing with described pipe is carried out the heat conducting material that the heat conduction contacts to allow described pipe and described water pot wall, and at least one layer material on every side that is coated on described water pot wall and described pipe securely.

Preferably, described pipe is pressed towards described water pot wall, and described pressure is kept by described at least one layer material, and preferably described pipe has circular cross-section, and its shape becomes the cross section of D shape when being pressed towards water pot.Perhaps, described pipe can have circular cross-section, and be pressed towards water pot during its shape become twayblade (bi-lobular) shape.In preferred embodiment, described at least one layer material comprise one deck stretch wrap film at least with and on the heat-reflecting material of one deck at least.Preferably, on the described heat-reflecting material of one deck at least, also can apply the other stretch wrap film of one deck at least.

Preferably, described stretch wrap film is a polyethylene system.In another embodiment, described heat conducting material is the heat transfer paste of non-curing.In another embodiment, the described stretch wrap film of one deck is at least surrounded described heat conducting material with gastight manner.Preferably, described pipe extends 85% of described at least water pot length.

The present invention provides a kind of method that forms water heater/cooler on the other hand, said method comprising the steps of: around the water pot wall, twine pipe, below described pipe, on the described wall of described pipe or described water pot, apply heat conducting material with described tube length breathing, contact to allow described pipe to carry out heat conductivity, and twine layer of material at least securely around described water pot wall and described pipe with described water pot wall.

Preferably, the bead-like body of heat conducting material puts on described water pot wall on each side of described pipeline, described bead-like body be formed one in conjunction with filler rod in use to strengthen the heat exchange of described pipe and described water pot wall.

Description of drawings

In order more easily to understand the present invention and the effect that tries out, describe below in conjunction with accompanying drawing, wherein:

Fig. 1 is the stereogram according to the water heater of a preferred embodiment of the present invention manufacturing;

Fig. 2 is the sectional view of the water heater shown in circle " 2 " zone among Fig. 1;

Fig. 3 is the zoomed-in view shown in Fig. 2 centre circle " 3 " zone;

Fig. 4 is applied on the water pot pipe to form the sequence of steps of water heater as shown in Figure 1; And

Fig. 5 is a kind of modification (not twining) of shape shown in Fig. 3.

The specific embodiment

A kind of water heater 10 shown in the drawings comprises: one has water pot 12, the one convex roofs 16 and a cylindrical side wall 18 of spill or convex diapire 14.Water pot 12 can be made by any suitable heat conduction or heat exchange material, is preferably the material based on metal or alloy.Water pot is made by glassed steel, stainless steel, copper or other suitable metal in preferred embodiment.One cold water inlet (not shown) is installed near the adjacent diapire 14, and hot water outlet (not shown) will be installed near the roof 16.Water pot 12 is maintained in the cylindrical housings 20 that is sealed by lid 22.The expanded material (not shown) of insulation is filled in water pot 12 and cylindrical housings 20 and covers in the space between 22.Pipe 24 be wrapped in cylindrical side wall 18 around and have one the inlet 26 and the outlet 28.Pipe 24 is suitable for the material that heat conduction or heat transmits and made by any equally, and the best is a metal or alloy system.Pipe 24 in preferred embodiment is made of copper (in view of its pliability and corrosion resistance).Pipe 24 generally extends 85% of cylindrical side wall 18 length at least.With cold-producing medium (not shown) pumping that is generally R22 and comprises the R12 equivalent by pipe 24 with heating cylindrical side wall 18 and add water in the hot-water cylinder 12 thus.Pipe 24 is parts of solar boosted heat pump water heating system, and this has in the 582291st and No. 603510 Australian Patent and describes.For fear of the content that repeats reference described in the 582291st and No. 603510 Australian Patent, these contents are incorporated by reference herein.

At the example that shown in Fig. 2 and Fig. 3 pipe 24 is applied to cylindrical side wall 18.Pipe 24 has D shape (not shown) with flat 30, oval or other approximate shapes, and the pipe deforming by making circular cross section or the moulding roller extrusion modling by as shown in the figure are pressed against on the cylindrical side wall 18 before being applied to cylindrical side wall 18.Pipeline 24 has the heat transfer paste 48 that is coated at the end 30 so that pipe 24 arrives the maximizes heat transfer of cylindrical side wall 18.Pipe 24 is installed to the material layer that is twined around cylindrical side wall 18 and the water heater 10 and compresses with maintenance under impaction state.Generally at first apply two-layer stretch wrap film 34,36.Stretch wrap film can be the polyethylene film of proper formulation.Following one deck 38 be aluminium foil and as the reflecting layer so that heat turns back to water heater 10.At last, the layer other four layers of

stretch wrap film

40,42,44,46 of packing in 38.The quantity of metal level and the relation of interweaving can change adapting to requirement, limit and can't help the position and the quantity of described layer.Because stretch wrap film is not exposed to ultraviolet ray down, will the change of film character can not take place.The coating of layer and extruding can guarantee the globality of heat transfer paste 48 and to heat transfer paste 48 sealing to avoid because air or thermal cycle and dry and hard possibility.Do not have to coat, heat transfer paste 48 will kill and become frangible after a period of time being exposed to air.Thermal cycle can be accelerated this cracked equally.This cracked heat conduction contact that can reduce between pipeline 25 and the sidewall 18.Coating makes heat transfer paste 48 be sealed in outside the air and avoids any dry and hard or multiviscosisty effect.

Fig. 4 illustrates pipe 24 is installed to sequential steps on the cylindrical side wall 18.Pipe 24 is by the roller extrusion modling in this embodiment.At first, circular cross-section (for example 10mm radius) pipeline 25 with a length moves into place and is bearing on the cylindrical side wall 18.A bead-like body of heat transfer paste 48 (for example 3mm diameter) is placed on the water pot 12 that horizontally rotates, and this water pot 12 to pipeline 25 application of forces, forces it to abut against on the cylindrical side wall 18 from a distributor (not shown) below distributor.The heat transfer paste 48 that is used for this embodiment is called as Bostik heat transfer paste #1128 or #5603.Heat transfer paste 48 in this embodiment is the lipid materials that do not have blocking characteristics, yet also can use the material of adhesion type.Secondly, pipeline 25 is pressed towards cylindrical side wall 18 and forms D shape (not shown) or ellipse, with the bead-like body that flattens heat transfer paste 48 and make heat transfer paste thickness homogenization of arriving the substrate 30 of pipe 24 to be applied.Heat transfer paste 48 will generally can leak out below substrate 30.Thereby pipeline 25 is deformed into D shape or oval pipe 24 by the compression roller 64 that pipeline is pushed and is deformed on the cylindrical side wall 18 around axle 66 rotations.Moreover the pair of parallel bead-like body 50,52 (4mm to 6mm diameter) of heat transfer paste is applied to the opposite side of cylindrical side wall 18 and pipe 24.This step will increase the size that heat is transmitted the area of coverage (footprint).Last step is that bead-like body 50,52 is molded into bar straight coupling 56 so that maximizes heat transfer.Pipe 24 generally from the top to the bottom, twine and by bearing bracket at (rather than being fixed on) cylindrical side wall 18 two ends, carriage generally is plastics and is clipped on the pipe.Chuck is supported on the cylindrical side wall 18 by a kind of non-stretching binder, binder around the water pot through being tightened up then.When pipe 24 arrived near the roof 16 of water pots 12, pipe 24 was clamped to keep homeostasis when coating twining.Pipe 24 generally is wrapped in the Lower Half 58 rather than the first half 60 with tighter spiral form.Other various winding methods also can use, the gradual spiral way that increases progressively with variable pitch for example, and two independently twine one above another or interlaced.Be this structure of realization water heater 10, and then as setting forth, apply all layer of 34-36, crossing the winding that is coated pipe 24 bendings are exported 28 to provide then with reference to Fig. 2 and 3.

Fig. 5 illustrates a modification of the pipe 24 of D shape section.In this embodiment, pipe 24 is depression shape so that the twayblade shape of band lobe 70,72 to be provided at 68 places.This will increase thermal mass density to increase the flow velocity of cold-producing medium in the pipe area in pipe 24 edges and slurry filler rod 56, cold-producing medium fluid is put aside and assisted fluid to return and improves reliability there.

Be disclosed in the 582291st and compare with the technology in No. 603510 Australian Patent, the formation of above-mentioned water heater has been simplified in preferred embodiment.In same test, to compare and be disclosed in water heater shown in the 582291st and No. 603510 Australian Patent, preferred embodiment shows 29% performance boost and has reduced the compressor reducer more than 10%/water temperature ratio at the intermediate point of high temperature range.These performance improvements will directly increase efficient and compressor life and reduce noise output.Preferred embodiment has and is higher than 28% the coefficient of performance at least.If 24 hours heat loss and recovery are subsequently taken into account, this value rises to 38%.

Although preferred embodiment is with reference to describing it as water heater, water pot 12 also can be contained cold water by the cooling (wherein the cold-producing medium in the pipe 24 is cold rather than hot) of opposite circulation.

Run through whole specification, unless context has needs, otherwise word " comprises ", or should be understood that to represent to comprise the group of whole or a plurality of integral body of being stated, but do not get rid of any other group of whole or a plurality of integral body such as the modification that " including " " comprises ".

The present invention should be understood as and contain those those skilled in that art are significantly, further revise, be considered to drop in the scope of broad sense of the present invention and the boundary, the content of here setting forth only is sensu lato character of the present invention and certain special embodiment of expressing by example.

Claims

1. water heater/cooler, comprise: water pot with wall of making by thermally-conductive materials, in use be fit to contain the pipe that carries refrigerant liquid and be installed in the outside around described water pot wall, length breathing with described pipe is carried out the heat conducting material that the heat conduction contacts to allow described pipe and described water pot wall, and be coated on securely described water pot wall and described pipe around at least one layer material, described at least one layer material comprise one deck stretch wrap film at least with and on the heat-reflecting material of one deck at least.

2. water heater/cooler according to claim 1 is characterized in that described pipe is pressed towards described water pot wall, and described pressure is kept by described at least one layer material.

3. as water heater/cooler as described in the claim 2, it is characterized in that described pipe has circular cross-section, shape becomes the cross section of D shape when being pressed towards water pot.

4. as water heater/cooler as described in the claim 2, it is characterized in that described pipe has circular cross-section, be pressed towards water pot during its shape become twayblade shape.

5. water heater/cooler according to claim 1 is characterized in that, also applies the other stretch wrap film of one deck at least on the described heat-reflecting material of one deck at least.

6. as water heater/cooler as described in each among the claim 1-4, it is characterized in that described stretch wrap film is a polyethylene system.

7. as water heater/cooler as described in each among the claim 1-4, it is characterized in that described heat conducting material is the heat transfer paste of non-curing.

8. as water heater/cooler as described in each among the claim 1-4, it is characterized in that the described stretch wrap film of one deck is at least surrounded described heat conducting material with gastight manner.

9. as water heater/cooler as described in each among the claim 1-4, it is characterized in that described pipe extends 85% of described at least water pot length.

10. method that forms water heater/cooler, said method comprising the steps of: around the water pot wall, twine pipe, below described pipe, on the described wall of described pipe or described water pot, apply heat conducting material with described tube length breathing, contact to allow described pipe to carry out heat conductivity with described water pot wall, and coat at least one layer material securely around described water pot wall and described pipe, described at least one layer material comprise one deck stretch wrap film at least with and on the heat-reflecting material of one deck at least.

11. as method as described in the claim 10, it is characterized in that, the bead-like body of heat conducting material puts on described water pot wall in the two opposite sides of described pipeline and water pot wall contact-making surface, and described bead-like body is formed one and engages filler rod in use to strengthen the heat exchange of described pipe and described water pot wall.