CN1864039A - Heating and defrosting methods and apparatus - Google Patents
Heating and defrosting methods and apparatus Download PDFInfo
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- CN1864039A CN1864039A CNA2004800292343A CN200480029234A CN1864039A CN 1864039 A CN1864039 A CN 1864039A CN A2004800292343 A CNA2004800292343 A CN A2004800292343A CN 200480029234 A CN200480029234 A CN 200480029234A CN 1864039 A CN1864039 A CN 1864039A
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- heat exchanger
- working fluid
- evaporator
- temperature
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- 238000010438 heat treatment Methods 0.000 title claims description 48
- 238000000034 method Methods 0.000 title claims description 36
- 238000010257 thawing Methods 0.000 title 1
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims description 66
- 230000014509 gene expression Effects 0.000 claims description 13
- 238000007710 freezing Methods 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 11
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 8
- 239000003915 liquefied petroleum gas Substances 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/11—Sensor to detect if defrost is necessary
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21175—Temperatures of an evaporator of the refrigerant at the outlet of the evaporator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
A heat pump includes a compressor 1, a condenser 2, an expansion valve 3, an evaporator 4 and a heat exchanger 6a. The heat exchanger 6a is located immediately downstream of the expansion valve 3 and upstream of the evaporator 4. A controller 8 monitors one or more variables which predict when icing of the evaporator 4 may be about to occur by means of a sensor 11. When this is predicted the heat exchanger 6a will receive hot refrigerant through line 17 from the high pressure side of the compressor 1 so as to heat the refrigerant entering the evaporator 4 until ice formation is no longer likely. In an alternative embodiment, the heat exchanger may utilise an electric element to heat the refrigerant before it enters the evaporator. The heat exchanger 6a can preferably utilise a helically corrugated tube in order to enhance its heat exchange characteristics.
Description
Technical field
In one embodiment the present invention relates to heat-pump apparatus and relate to the method for operate heat pump, and particularly, but be not only to relate to and reduce or eliminate the icing heat pump of evaporimeter.Yet, have the purposes that requirement adds hot fluid really.
Background technology
Use term " heat pump " to define a system herein, it absorbs heat (heat energy) at one or more temperature place, with emit heat at a higher temperature place, and it comprises according to order: the compressor around closed circuit pump refrigerant steam, condenser, thereby condensating refrigerant from the steam extraction heat, swell refrigeration agent is to the expansion valve of gas phase, thereby cause the temperature of cold-producing medium to reduce, He Yitai makes cold refrigerant vapour can absorb the evaporimeter of heat.
Cold-producing medium returns compressor and repetitive cycling then.Also can use the element as gatherer and receiver to guarantee that fluid was in correct phase before beginning is around circulation.
Recognize that the term heat pump can be equally applicable to this system when being used for getting rid of heat from space or medium, for example at the purpose of air-conditioning and refrigeration, perhaps is equally applicable to be used for heating the system of a space or medium, as the heating in water or space.Usually, a cross valve will be included in the heat pump, change condenser to evaporimeter before compressor, and vice versa.Therefore term " evaporimeter " and " condenser " are used interchangeably herein, depend on whether heat pump is used for its heating or refrigeration mode.Other purposes as heated air or other fluids also will comprise.This purposes can comprise the fluid heating of picture in hydraulic system or in the engine, and the viscosity that reduces fluid there is useful.Further purposes can comprise heated air, as compressed gas before release when its cooling can have problems.
Heat pump techniques is very common now, and except its more traditional effect in air-conditioning, is to come into one's own more widely now by the saving of using this heating means to obtain.Many governments and management organization and industrial department and commercial department are recognizing this benefit.Energy-conservation needs have been become around one of the world paid the utmost attention to.
Use the existing heat pump that is used to heat, shortcoming is when the environment temperature around evaporimeter is brought down below minimum temperature, usually approximately+10 ℃, on evaporimeter, may freeze.When this happens because the thermal conductivity of ice is low, reduced the speed that heat can be absorbed by evaporimeter, the efficient of heat pump significantly reduced.
It is existing that to be used to stop a kind of selection that evaporimeter freezes be to be connected precautionary measures on the evaporimeter or that embed the heating in the evaporimeter.Heat pump may stop in this system, and is evacuated to the cold-producing medium of gas tank before heating fumigators.Failing arresting stop may cause liquid refrigerant to enter compressor, and this may damage or even damage compressor.In case heat pump is stopped, heater element thaws coil, dissolve up to ice, and unit can rerun.Heating element heater can circulate repeatedly by spells, raises up to environment temperature.
The existing second method of using is a hot gas by-pass system.When evaporator coil ices, a magnetic valve is opened, hot gas just behind expansion gear direct injection enter evaporimeter.The method of this evaporimeter deicing may influence the operation of system significantly, and performance may correspondingly descend.
The existing other method of using is to make heat pump reverse, so the functions reversed of evaporimeter and condenser.The shortcoming of this method is that heat transfer path is reverse, and is replaced cooling at element that deicing cycle period heat pump is used for heating.
Goal of the invention
The purpose of optimum embodiment of the present invention provides a kind of heat-pump apparatus and/or a kind of method of operating heat pump, and they will overcome or improve present this equipment or the existing problem of method.
Other purposes of the present invention are very clear by following explanation meeting, only provide by way of example.
Summary of the invention
Provide a kind of heat-pump apparatus according to first aspect of the present invention, comprise evaporator; Control device, control device is communicated with at least one sensor device, and described sensor device is suitable for measuring the variable of the hull-skin temperature of the described evaporator of one or more expressions; And heat exchanger device, heat exchanger device operationally will be added on the described working fluid that enters described evaporator from the heat of the on high-tension side working fluid of described heat-pump apparatus, wherein, when described control device determines that the described temperature of the described outer surface of described evaporator is lower than the temperature of preliminary election, described control device is connected to carry out described heating with described heat exchanger device operability, thereby, reduce or eliminate freezing on the described outer surface of described evaporimeter fully.
Preferably, described heat exchanger device comprises a helical bellows that is positioned at shell, flow through described pipe from described on high-tension side described working fluid, thereby to flowing through the described working fluid heating between described pipe and described pipe and the described shell.
Optionally, described at least one sensor device comprises a temperature sensor that is suitable for measuring the described hull-skin temperature of described evaporimeter.
Optionally, described at least one sensor device comprises a temperature sensor that is suitable for measuring the temperature working fluid that leaves evaporimeter.
Optionally, described at least one sensor device comprises a temperature sensor that is suitable for measuring around the environment temperature of evaporimeter.
Optionally, described at least one sensor device comprises a pressure sensor that is suitable for measuring the working fluid pressure that leaves evaporimeter.
Optionally, described heat exchanger device comprises a heating.
Optionally, described heat exchanger device obtains heat from the compressor of described heat-pump apparatus and the described working fluid between the condenser, transmits described heat and gives the described working fluid that enters described evaporator.
Optionally, described preselected temperature is between about 4 ℃ and 0 ℃.
Provide a kind of heat-pump apparatus according to second aspect of the present invention, comprise evaporator; Control device, control device is communicated with at least one sensor device, and described sensor device is suitable for measuring the variable of the hull-skin temperature of the described evaporator of one or more expressions; And heat exchanger device, heat exchanger device comprises the heating element heater in the downstream of the expansion gear that is positioned at described evaporator upstream and is positioned at described heat pump, heat exchanger device operationally heats the working fluid that enters described evaporimeter, wherein, when described control device determines that the described temperature of the outer surface of described evaporator is lower than the temperature of preliminary election, described control device is connected with described heat exchanger device operability, heat exchanger device heats described working fluid, thereby, reduce or eliminate freezing on the described outer surface of described evaporimeter fully, and wherein said heat exchanger device comprises the helical bellows that is positioned at shell, and makes heated described working fluid flow through described pipe and flow between described pipe and described shell.
Optionally, helix tube comprises the described heating element heater that extends through.
Optionally, helix tube constitutes the part of heating element heater.
Optionally, described at least one sensor device can comprise a temperature sensor that is suitable for measuring the described hull-skin temperature of described evaporimeter.
Optionally, described at least one sensor device can comprise a temperature sensor that is suitable for measuring the temperature working fluid that leaves evaporimeter.
Optionally, described at least one sensor device can comprise a temperature sensor that is suitable for measuring around the environment temperature of evaporimeter.
Optionally, described at least one sensor device can comprise a pressure sensor that is suitable for measuring the working fluid pressure that leaves evaporimeter.
Optionally, described heat exchanger device can transmit heat and give the working fluid that enters described evaporimeter from being in the on high-tension side working fluid of described heat-pump apparatus.
Optionally, described heat exchanger device can transmit heat and give the working fluid that enters described evaporimeter from the working fluid between described compressor and the described condenser.
Optionally, described working fluid can be back between described condenser and the described expansion gear by behind the described heat exchanger.
Optionally, described preselected temperature can be between 4 ℃ and 0 ℃.
Provide the method for heat pump that a kind of operation has the evaporator in expansion gear downstream according to the 3rd aspect of the present invention, method comprise as required from from the on high-tension side working fluid of described heat pump to described working fluid heating from the low-pressure side of described heat pump, preferentially to entering the described working fluid heating of described evaporimeter, reduce or prevent freezing on the outer surface of described evaporator fully.
Optionally, this method comprises makes described working fluid by heat exchanger with for heat exchanger provides helical bellows, when the working fluid adstante febre can flow through it.
Optionally, this method comprises the variable of the hull-skin temperature of measuring the described evaporator of one or more expressions, with when described one or more variablees indicate described temperature to be brought down below the preliminary election minimum of a value, the working fluid that enters described evaporimeter is carried out described heating.
Optionally, this method comprises provides a controller, and it is icing to determine when that according to the described measurement of described one or more variablees described evaporator approaches.
Optionally, this method comprises with heating and heats the working fluid that enters described evaporator.
Optionally, this method comprises using from the compressor of described heat pump and the heat of the described working fluid between the condenser and heats the working fluid that enters described evaporator.
Optionally, this method comprises when described heat pump and in when operation described working fluid is carried out described heating.
According to the 4th aspect of the present invention, be used for the firing equipment of fluid circuit, comprise the heat exchanger device that operationally heats the fluid that in described loop, flows; At least one sensor device that is suitable for measuring the described fluid temperature (F.T.) of one or more expressions; Control device, this control device is communicated with described at least one sensor device, and is connected with described heat exchanger device operability when described control device determines that described temperature is lower than preselected temperature, to give described fluid heating.
According to the 5th aspect of the present invention, heat pump and/or the operation heat pump method with and/or firing equipment describe fully with reference to the accompanying drawings at this.
Of the present invention many-sided, should take into full account its novelty aspect, will be very clear from following explanation, only provide by way of example and with reference to the accompanying drawings.
Description of drawings
Fig. 1: be schematic diagram according to the heat-pump apparatus of a possible embodiment of the present invention;
Fig. 2 A: be the very concise and to the point cross-sectional view that passes through heat exchanger and heating element heater, between the skin of corrugated conduit and heating element heater, have at interval, amplify for clear according to a possible embodiment of the present invention;
Fig. 2 B: be the very concise and to the point cross-sectional view that passes through heat exchanger and heating element heater according to another possible embodiment of the present invention;
Fig. 3: be according to the schematic diagram of the heat-pump apparatus of possible embodiment in addition of the present invention, have 2 runners that replace that are used for cold-producing medium that illustrate;
Fig. 4: part is analysed and observe the sketch that the face of land is shown with the heat exchanger that may use with the present invention;
Fig. 5: part is illustrated in the sketch of the alternative embodiment of the heat exchanger that uses among the present invention with analysing and observe;
Fig. 6: part is illustrated in the sketch of the other possible embodiment of the heat exchanger that uses among the present invention with analysing and observe;
Fig. 7 A: part analyse and observe the face of land be shown with may be in the prior art that the present invention uses the sketch of heat exchanger;
Fig. 7 B: the sketch of the cross section of the heat exchanger of presentation graphs 7A.
The specific embodiment
At first with reference to figure 1, according to a possible embodiment of the present invention, heat-pump apparatus is labeled as 100 usually.Heat pump 100 illustrates its use as the heating circuit that is used to add hot water, but will recognize that this invention also can be used for the purposes of requirement refrigeration or air-conditioning.
Heat pump comprises compressor 1, condenser 2, and expansion gear, for example expansion valve 3 and evaporimeter 4 are just as the heat pump of those prior aries, according to identical order and finish identical functions.Receiver and/or gatherer (not shown) also can use on demand.Condenser 2 provides heat for suitable medium, the thermal water source 5 of family expenses for example, and current are indicated by top arrow, show to enter and leave condenser 2.
Herein, " high pressure " side of heat pump refers to that part of loop that between compressor 1 and expansion valve 3 working fluid or " cold-producing medium " pass through, and " low pressure " side of heat pump refers to the remainder of heat pump circuit.
According to one embodiment of present invention, heat pump 100 further comprises heat exchanger 6, and expression is located immediately at the downstream of expansion valve 3 and the upstream of evaporimeter 4.
The hull-skin temperature of evaporimeter 4 can be determined by direct measurement, perhaps can calculate by the measured value of its dependent variable, for example tables look-up to determine by use.
The variable of measuring can comprise one or more temperature that center on the surrounding air of evaporimeter 4, leave the temperature of the cold-producing medium of evaporimeter 4, the surface temperature of evaporimeter 4 or leave the pressure of the cold-producing medium of evaporimeter 4, this pressure is called " suction pressure ", with the evaporimeter of heat pump icing direct relation is arranged.Those skilled in the art understands also can monitor its dependent variable.Fig. 1 represents that sensor 10 monitoring leaves the temperature of the cold-producing medium of evaporimeter 4, and transmits information with temperature correlation to controller 8.
When the argument table that is detected by controller 8 reveals on evaporimeter 4, i.e. (not shown) on the outer surface of evaporator coil, during the sign that might freeze, controller 8 can start heating 7, thus heating enters the cold-producing medium of evaporimeter 4.This process can continue to reach the critical value that can not freeze again up to the variable that is detected by controller 8.In this point, controller 8 can cut out heating element heater 7.Controller 8 can continue monitored parameters, and can continue to switch as required the Kai Heguan of heating element heater 7.
The heating and cooling agent does not need to stop heat pump 100 and just can avoid evaporimeter 4 to freeze by this way, those skilled in the art will recognize, because heat from condenser 2, has at least a part can be reclaimed by the energy that heating element heater 7 joins system.
Next with reference to figure 2, those skilled in the art will appreciate that typical electrical equipment 7 comprise resistive element 12, around the material 13 and outer 14 of the thermally conductive, electrically non-conductive of resistive element 12.In heat exchanger 6 of the present invention, above outer 14, can provide helical bellows or conduit 15, it is enough to make heat to conduct to conduit 15 from outer 14 with outer closely the contact.In order to improve the heat exchange between element 7 and the cold-producing medium 16, helical bellows or conduit 15 preferably adopt the method that illustrates among applicant's the PCT specification WO 94/07071 to make.
Shown in Fig. 2 B, helicon lamina 15 can substitute outer 14 in an alternate embodiment of the invention.
Next with reference to figure 3, the 2nd possible embodiment of heat pump represents with arrow 200 that usually same Reference numeral is used at same parts among the figure.
Heat pump 200 also comprises heat exchanger 6a and controller 8.Controller 8 has pressure sensor 11, can detect " suction pressure " in the compressor suction line 9, although as described above, also can replenish or replace the variable that detects other.
Under the pressure in the suction line 9, be reduced to the minimum of a value of preliminary election, controller 8 can allow warm refrigerant to flow through suction line 17 to heat exchanger 6a from the high-pressure side of heat pump, thereby the cold-producing medium of heating fumigators 4 upstreams freezes on evaporimeter 4 with preventing at once.
Warm refrigerant can be taken from the Anywhere on high-tension side of circulation, but preferably takes between compressor 1 and the condenser 2, and cold-producing medium is in its maximum temperature herein.Hot fluid preferably is back to the downstream of condenser 2 by efferent duct 18 behind over-heat-exchanger 6a, though fluid can turn back to identical point in the circulation substantially behind over-heat-exchanger 6a in some embodiments, as the efferent duct 18a that illustrates in the diagram.
Determine to freeze when no longer urgent when controller 8, warm refrigerant to flowing of heat exchanger 6a can stop, and makes equipment 200 with the highest efficient operation.Controller 8 can be a simple mechanical valve in a preferred embodiment, works by the change of pressure in the compressor suction line 9.
With reference now to Fig. 4 of accompanying drawing,, the sketch of the heat exchanger that its expression is suitable in the present invention, and the identical Reference numeral that also uses those formerly to use among the figure among the figure.Heat exchanger 6 expressions have shell or overlap 20, have import 21 and outlet 22, and the direction that flows is represented by the arrow X of the cold-producing medium that will be heated.At shell or overlap in 20 expression helical bellows or conduit 15, limit refrigerant flow channel 16 at pipe 15 and shell or between overlapping 6.Electrical equipment 12 expressions are by helix tube 15 extensions and have electrical terminal 17 and 18.Usually, around electrical equipment 12 will be magnesian core or analog.Fig. 5 of Fig. 4 and back and the helix tube of Fig. 6 15 are applicable to that the PCT specification WO94/07071 according to the applicant makes.
Forward Fig. 5 then to, in the alternate embodiment of heat exchanger 6, at shell or overlap helical bellows or conduit 15 are provided in 20 once more, come to be mobile the provide helical flow path 16 of cold-producing medium according to the direction of arrow X.But helix tube 15 can the component part heating in this embodiment, and is the electric loop part between terminal 18 and 17, so that provide cold-producing medium to flow through the direct heating on helical corrugation surface.
Then with reference to figure 6, working fluid will cause along direction shown in the arrow B by the flowing of helix tube 15 in a further embodiment, and fluid is in that temperature raises so that provide heat energy to transfer to the cold-producing medium that flows along arrow X-X direction by helical bellows 15.
The embodiment of this heat exchanger 6 will be the special use among the embodiment of Fig. 3.
With reference to the replacement form of heat exchanger shown in Figure 7, this heat exchanger form is open in WO 98/27395 then, and shows once more and have shell or overlap 20, provides import 21 and outlet 22 that cold-producing medium is flowed according to the direction of arrow X.Represented to have the pipe or the conduit 23 of ripple 24 in overcoat 20, they are expressed as along the axis of heat exchanger 6 and extend axially in this example.Shown in Fig. 7 B, heating 12 is expressed as by pipe or conduit 23 and extends.Dividing plate 25 has prolonged the length of heat exchanger 6, so cold-producing medium must along the circumferential direction and axially pass through in import 21 with between exporting 22 around pipe or conduit 23, the heat transmission is reached to greatest extent.
Those skilled in the art will recognize Fig. 1 and embodiment shown in Figure 3 if necessary can in conjunction with, and controller 8 can determine whether to be used alone the combination that heating means still are for both.
Those skilled in the art also will recognize by preventing on evaporimeter 4 icing, do not stop to flow of cold-producing medium, when using in the environment that may occur freezing at evaporimeter, for example be brought down below situation about 10 ℃ in environment temperature, the present invention may be more effective than the heat pump of prior art.
To recognize that also the present invention can use in many other occasions, is used for adding hot fluid.For example, it is contemplated that by the liquefied petroleum gas that from liquefied petroleum gas (LPG) jar, takes out and to use heat exchanger to heat, for example just as shown in Fig. 4,5 or 6.LPG can be converted into the gas outside the LPG jar in this method, and LPG can be in the danger of solidifying with too fast speed discharge else if.On the other hand, the gas of compression should heat before being released, to avoid undesirable gas cooled under low pressure.In addition, the fluid in hydraulic circuit or engine just should heat when requiring thinning and reduce its viscosity, for example just can be benefited as heating in diesel engine starting.The present invention also can be used for refrigerating circuit, as family expenses or commercial refrigerators.
In the above description, the concrete element or the integral body of this invention with known equivalent is illustrated, so, just comprise this equivalent here, just as statement separately.
Although this invention with being illustrated for example and with reference to the mode of its possible embodiment, be recognized, under the prerequisite of the invention scope of determining in not violating additional claims, can make an amendment and improve.
Claims (22)
1. a heat-pump apparatus comprises evaporator; Control device, control device is communicated with at least one sensor device, and described sensor device is suitable for measuring the variable of the hull-skin temperature of the described evaporator of one or more expressions; And heat exchanger device, heat exchanger device operationally will be added on the described working fluid that enters described evaporator from the heat of the on high-tension side working fluid of described heat-pump apparatus, wherein, when described control device determines that the described temperature of the described outer surface of described evaporator is lower than the temperature of preliminary election, described control device is connected to carry out described heating with described heat exchanger device operability, thereby, reduce or eliminate freezing on the described outer surface of described evaporator basically.
2. a heat-pump apparatus comprises evaporator; Control device, control device is communicated with at least one sensor device, and described sensor device is suitable for measuring the variable of the hull-skin temperature of the described evaporator of one or more expressions; And heat exchanger device, heat exchanger device comprises the heating element heater in the downstream of the expansion gear that is positioned at described evaporator upstream and is positioned at described heat-pump apparatus, heat exchanger device operationally heats the working fluid that enters described evaporimeter, wherein, when described control device determines that the described temperature of the outer surface of described evaporator is lower than the temperature of preliminary election, described control device is connected with described heat exchanger device operability, heat exchanger device heats described working fluid, thereby, reduce or eliminate freezing on the described outer surface of described evaporator fully, and described heat exchanger comprises the helical bellows that is positioned at shell, and makes heated described working fluid flow through described pipe and flow between described pipe and described shell.
3. heat-pump apparatus according to claim 1 and 2, wherein, described at least one sensor device comprises the temperature sensor of the described hull-skin temperature that is suitable for measuring described evaporator.
4. according to each described heat-pump apparatus of front claim, wherein, described at least one sensor device comprises the temperature sensor of the temperature that is suitable for measuring the working fluid that leaves evaporator.
5. according to each described heat-pump apparatus of front claim, wherein, described at least one sensor device comprises the temperature sensor that is suitable for measuring around the environment temperature of evaporator.
6. according to each described heat-pump apparatus of front claim, wherein, described at least one sensor device comprises the pressure sensor that is suitable for measuring the working fluid pressure that leaves evaporator.
7. according to each described heat-pump apparatus of front claim, wherein, described heat exchanger device comprises heating.
8. when quoting claim 2, heat-pump apparatus according to claim 7, wherein, described heating extends through described helical bellows.
9. heat-pump apparatus according to claim 8, wherein, described helical bellows constitutes the part of the electric loop of heating.
10. according to each described heat-pump apparatus of front claim, comprise compressor and condenser, and described heat exchanger device obtains heat described heat is passed to the described working fluid that enters described evaporator from the described working fluid between described compressor and the described condenser.
11. according to each described heat-pump apparatus of front claim, wherein, described preselected temperature is between about 4 ℃ and 0 ℃.
12. heat-pump apparatus according to claim 1, wherein, described heat exchanger device comprises the helical bellows that is positioned at shell, flow through described pipe from described on high-tension side described working fluid, thereby the described working fluid that flows through between described pipe and described pipe and the described shell is heated.
13. at this with reference to figure 1 or Fig. 3, or Fig. 1 or Fig. 3 together with Fig. 2 A, the 2B, 4,5 of accompanying drawing, 6 or 7A and 7B in any one a kind of heat-pump apparatus that illustrates fully.
14. an operation has the method at the heat pump of the evaporimeter in expansion gear downstream, this method is included in described working fluid and enters before the described evaporimeter, obtain the described working fluid of heat from the on high-tension side working fluid of described heat pump as required, on the outer surface of described evaporimeter, freeze to reduce or to prevent fully with the low-pressure side of passing to described heat pump.
15. method according to claim 14, wherein, this method comprises the variable of the hull-skin temperature of measuring the described evaporimeter of one or more expressions, with when described one or more variablees indicate described temperature to be brought down below the preliminary election minimum of a value, the working fluid that enters described evaporimeter is carried out described heating.
16. according to claim 14 or 15 described methods, wherein, described method further comprises provides controller, it is icing to determine when that with the described measurement according to one or more variablees described evaporimeter approaches.
17. according to each described method of claim 14 to 16, wherein, this method comprises with heating and heats the working fluid that enters described evaporimeter.
18. according to each described method of claim 14 to 17, wherein, described high-pressure side is between the compressor and condenser of heat pump.
19. according to each described method of claim 14 to 18, wherein, the described low-pressure side of described heat pump is provided with heat exchanger, described method is included in provides the described heat exchanger that has helical bellows in the shell, described working fluid is flow through between described pipe and the described shell be heated before entering described evaporimeter at it.
20. according to each described method of claim 14 to 19, wherein, this method comprise when described heat pump when work to described working fluid heating.
21. a firing equipment that is used for fluid circuit comprises the heat exchanger device that operationally heats the fluid that flows in described loop; At least one sensor device that is suitable for measuring the described fluid temperature (F.T.) of one or more expressions; Control device, control device is communicated with described at least one sensor device, and, when determining that described temperature is lower than preselected temperature, described control device is connected, to give described fluid heating with described heat exchanger device operability.
22. the method for operation heat pump at this with reference to any one embodiment of the present invention and describing fully with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ528678 | 2003-10-06 | ||
| NZ528678A NZ528678A (en) | 2003-10-06 | 2003-10-06 | Heat pump with refrigerant from high pressure side passed through heat exchanger to prevent ice formation on evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1864039A true CN1864039A (en) | 2006-11-15 |
| CN100510582C CN100510582C (en) | 2009-07-08 |
Family
ID=34420857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800292343A Expired - Fee Related CN100510582C (en) | 2003-10-06 | 2004-09-28 | Heating and defrosting methods and apparatus |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070199335A1 (en) |
| EP (1) | EP1690048A1 (en) |
| CN (1) | CN100510582C (en) |
| AU (1) | AU2004277567A1 (en) |
| NZ (1) | NZ528678A (en) |
| WO (1) | WO2005033596A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102607213A (en) * | 2012-03-29 | 2012-07-25 | 南京都乐制冷设备有限公司 | Oil gas recovery evaporator and condensation type oil gas recovery device |
| CN101932892B (en) * | 2008-01-30 | 2012-10-24 | 达克斯制造有限公司 | Methods and apparatuses for operating heat pumps in hot water systems |
| CN104114391A (en) * | 2012-02-16 | 2014-10-22 | 法雷奥热系统公司 | Air-conditioning loop functioning as a pulse electro-thermal deicing heat pump |
| CN105953425A (en) * | 2016-06-15 | 2016-09-21 | 许鸣华 | Direct bathing type air energy water heater |
| CN113263885A (en) * | 2020-02-14 | 2021-08-17 | 大众汽车股份公司 | Method for regulating a heat pump for a motor vehicle, heat pump for a motor vehicle and motor vehicle |
| CN113263885B (en) * | 2020-02-14 | 2024-04-30 | 大众汽车股份公司 | Method for regulating a heat pump for a motor vehicle, heat pump for a motor vehicle and motor vehicle |
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| US9857103B2 (en) | 2013-11-04 | 2018-01-02 | Lg Electronics Inc. | Refrigerator having a condensation loop between a receiver and an evaporator |
| US20090044557A1 (en) * | 2007-08-15 | 2009-02-19 | Johnson Controls Technology Company | Vapor compression system |
| FR2927159A1 (en) * | 2008-02-04 | 2009-08-07 | Mobile Comfort Holding Soc Par | MULTIPURPOSE THERMODYNAMIC DEVICE FOR HEATING AND AIR CONDITIONING |
| EP2085721A1 (en) * | 2008-02-04 | 2009-08-05 | Mobile Comfort Holding | Multi-energy thermodynamic device with simultaneous production of hot water, warm water, cold water and electricity |
| CZ307232B6 (en) * | 2008-11-27 | 2018-04-18 | Pzp Heating A.S. | A method of controlling defrosting of evaporators of air-to-water heat pumps with a helical compressor and a device for implementing this method |
| KR101175451B1 (en) * | 2010-05-28 | 2012-08-20 | 엘지전자 주식회사 | Hot water supply device associated with heat pump |
| CN101929761A (en) * | 2010-09-09 | 2010-12-29 | 李洲 | Integrated heat exchange system |
| US8955346B2 (en) | 2010-11-04 | 2015-02-17 | International Business Machines Corporation | Coolant-buffered, vapor-compression refrigeration apparatus and method with controlled coolant heat load |
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| US8899052B2 (en) | 2010-11-04 | 2014-12-02 | International Business Machines Corporation | Thermoelectric-enhanced, refrigeration cooling of an electronic component |
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| CN102322712A (en) * | 2011-08-26 | 2012-01-18 | 曹少疑 | Novel heating wire defrosting device for air energy heat pump water heater |
| US9207002B2 (en) | 2011-10-12 | 2015-12-08 | International Business Machines Corporation | Contaminant separator for a vapor-compression refrigeration apparatus |
| EP4006467B1 (en) * | 2013-11-04 | 2023-09-20 | LG Electronics Inc. | Refrigerator |
| CN106797677B (en) * | 2014-08-29 | 2021-01-12 | 特灵空调系统(中国)有限公司 | System and method for detecting heater failure and preventing dry-fire |
| US10391835B2 (en) * | 2015-05-15 | 2019-08-27 | Ford Global Technologies, Llc | System and method for de-icing a heat pump |
| KR102359300B1 (en) | 2015-07-28 | 2022-02-08 | 엘지전자 주식회사 | Refrigerator |
| KR102480701B1 (en) * | 2015-07-28 | 2022-12-23 | 엘지전자 주식회사 | Refrigerator |
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-
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- 2004-09-28 CN CNB2004800292343A patent/CN100510582C/en not_active Expired - Fee Related
- 2004-09-28 EP EP04775159A patent/EP1690048A1/en not_active Withdrawn
- 2004-09-28 WO PCT/NZ2004/000234 patent/WO2005033596A1/en active Application Filing
- 2004-09-28 US US10/595,294 patent/US20070199335A1/en not_active Abandoned
- 2004-09-28 AU AU2004277567A patent/AU2004277567A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932892B (en) * | 2008-01-30 | 2012-10-24 | 达克斯制造有限公司 | Methods and apparatuses for operating heat pumps in hot water systems |
| CN104114391A (en) * | 2012-02-16 | 2014-10-22 | 法雷奥热系统公司 | Air-conditioning loop functioning as a pulse electro-thermal deicing heat pump |
| CN102607213A (en) * | 2012-03-29 | 2012-07-25 | 南京都乐制冷设备有限公司 | Oil gas recovery evaporator and condensation type oil gas recovery device |
| CN105953425A (en) * | 2016-06-15 | 2016-09-21 | 许鸣华 | Direct bathing type air energy water heater |
| CN113263885A (en) * | 2020-02-14 | 2021-08-17 | 大众汽车股份公司 | Method for regulating a heat pump for a motor vehicle, heat pump for a motor vehicle and motor vehicle |
| CN113263885B (en) * | 2020-02-14 | 2024-04-30 | 大众汽车股份公司 | Method for regulating a heat pump for a motor vehicle, heat pump for a motor vehicle and motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2004277567A1 (en) | 2005-04-14 |
| CN100510582C (en) | 2009-07-08 |
| WO2005033596A1 (en) | 2005-04-14 |
| EP1690048A1 (en) | 2006-08-16 |
| US20070199335A1 (en) | 2007-08-30 |
| NZ528678A (en) | 2006-11-30 |
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