CN108168041A - A kind of air-conditioning defrosting device and its defrosting method - Google Patents

A kind of air-conditioning defrosting device and its defrosting method Download PDF

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Publication number
CN108168041A
CN108168041A CN201810172260.5A CN201810172260A CN108168041A CN 108168041 A CN108168041 A CN 108168041A CN 201810172260 A CN201810172260 A CN 201810172260A CN 108168041 A CN108168041 A CN 108168041A
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China
Prior art keywords
heat
fuel tank
exchange tube
temperature
air
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Pending
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CN201810172260.5A
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Chinese (zh)
Inventor
李小红
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李小红
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Priority to CN201810172260.5A priority Critical patent/CN108168041A/en
Publication of CN108168041A publication Critical patent/CN108168041A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles

Abstract

This application discloses a kind of air-conditioning defrosting device of air-conditioning equipment field, including being mounted on outdoor outer machine, the outdoor heat exchanger being already installed on inside outer machine, it is characterised in that:The first heat-exchange tube and the second heat-exchange tube are provided in the outdoor heat exchanger, first heat-exchange tube is connected with the compressor reducer of air-conditioning and is connected with indoor heat exchanger, the second heat-exchange tube unicom is provided with fuel tank, oil pump is connected between the fuel tank and the second heat-exchange tube, second heat-exchange tube, oil pump and fuel tank form closed loop cycle circuit, heating unit is provided in the fuel tank, heat kerosene has been filled in fuel tank, first heat-exchange tube and the second heat-exchange tube are in a heat exchanger side by side, spacing is 2 centimetres or so, pass through this outdoor machine of air-conditioner evaporator, evaporimeter frosting can thoroughly be avoided.

Description

A kind of air-conditioning defrosting device and its defrosting method
Technical field
The present invention relates to air-conditioning equipment fields, and in particular to a kind of air-conditioning defrosting device and its defrosting method.
Background technology
Present air conditioner generally has the mode of refrigeration and heating, when ambient temperature is relatively low, air-conditioning work is heating During pattern, compressor drains into the gaseous refrigerant of high temperature and pressure in air conditioner, and machine is dissipated the gas of high temperature and pressure indoors Heat promotes air to flow by wind turbine, and warm wind is sent to the room, achievees the purpose that heating.Condensed gaseous refrigerant becomes The liquid refrigerant of medium temperature and medium pressure, by throttling set reducing pressure by regulating flow, the evaporation endothermic in outdoor unit becomes the gas of low-temp low-pressure Body completes a heating cycle by compressor sucking.In heating operations, the heat exchanger of outdoor unit, heat-exchanger surface meeting There is frost layer, when frost layer reaches certain thickness, will influence to exchange heat.Prior art generally use two ways defrosts.
The first is inverse endless form, i.e., the exhaust of compressor is imported into the heat exchanger of outdoor unit side, go to melt Frost layer in heat exchanger of outdoor unit so that heat exchanger restores heat exchange property.In this state, the heat of indoor unit side is handed over Parallel operation acts as evaporator use, and therefore, during defrost, system can absorb certain heat from indoor, cause room The fluctuation of interior temperature.Another Defrost mode is that compressor is not shut down during defrosting, and increases an electromagnetism in outdoor unit side Valve bypass branch.When needing defrosting, solenoid valve is opened, and a gaseous refrigerant part for the high temperature and pressure of compressor discharge is by electricity Magnet valve bypass branch, which enters in heat exchanger of outdoor unit, to defrost, and another part gets in maintenance coil temperature.This mode sheet Matter is defrosted using the energy of compressor work, and this mode can not only be influenced by external environment, if external environment is During the situation of low temperature and high relative humidity, the time used in this Defrost mode will be grown very much, and be susceptible to defrost failure, and effect is more next It is poorer.
In addition present defrost mode is all by the temperature and humidity outside the heat exchanger outside sensor sensing chamber, comes Judge heat exchanger on whether frosting, start defrost program if frosting;Due to carrying out defrost after frosting again, according to the latent of water The huge spread of heat and specific heat, the required heat of defrost is carried out to the heat exchanger of frosting will be very big, so existing It is very big being consumed energy by the way of defrost again after frosting.
Invention content
The present invention provides a kind of air-conditioning defrosting device, to solve present air-conditioning defrost for above-mentioned technical problem It is not thorough, consumes energy the problem of serious.
In order to solve the above technical problem, the present invention provides following technical solutions:A kind of air-conditioning defrosting device, including installation In outdoor outer machine, the outdoor heat exchanger being already installed on inside outer machine is provided with the first heat in the outdoor heat exchanger Pipe and the second heat-exchange tube are exchanged, first heat-exchange tube is connected with the compressor reducer of air-conditioning and is connected with indoor heat exchanger, The second heat-exchange tube unicom is provided with fuel tank, is connected with oil pump between the fuel tank and the second heat-exchange tube, and described second Heat-exchange tube, oil pump and fuel tank form closed loop cycle circuit, are provided with heating unit in the fuel tank, heating agent has been filled in fuel tank Oil, first heat-exchange tube and the second heat-exchange tube in a heat exchanger side by side and formed Double-spiral.
Operation principle of the present invention:When air-conditioning work is in heating operations, outdoor heat exchanger reaches in endothermic process The heat kerosene being stored in fuel tank is flowed into the second heat-exchange tube by the front opening oil pump of frosting condition, passes through heating in fuel tank Device continuous heating;The first heat-exchange tube is directly absorbed into the heat of the second heat-exchange tube, while the second heat-exchange tube spoke at this time Heat is penetrated, the first exchange hot channel ambient enviroment is allowed to be maintained on frosting temperature.Sky is prevented from it is achieved thereby that not shutting down Adjust the ability of frosting.
Beneficial effects of the present invention are:1st, this programme adds in the second heat exchanging pipe in outdoor heat exchanger, passes through Two heat exchanging pipes ensure that the temperature around the first heat-exchange tube more than frosting critical point, effectively prevent air-conditioning frosting; With regard to intelligent starting defrosting mode before frosting critical point, reprocessed later spent by defrost compared with traditional air conditioner frosting in this way Energy will lack 80 times;(specific heat of water be 4.18 kilograms kilojoule degree, and ice 0 degree heat absorption melt, latent heat for 335 kilograms Kilojoule degree is 80 times of specific heat.);The consumption for saving energy can also be reached in this way.2nd, the first heat-exchange tube one in this programme It is straight to keep work, stop heating without air-conditioning, it is possible to by peripheral hardware heat-exchange system realization defrost or prevent the mesh of frosting 's;The final experience sense for so that air-conditioning uses is optimized.
Further, in order to reduce the loss of heat, second heat-exchange tube is both provided with insulating layer with fuel tank outer wall.
Further, be provided with the first temperature sensor in the fuel tank, thus can constantly to the temperature in fuel tank into Row management and control, when tank temperature is relatively low, the heat kerosene in fuel tank selects 200~220 DEG C in this programme;When heat kerosene is less than During the temperature, start heating unit and heat kerosene is heated.
Further, second temperature sensor is installed on first heat-exchange tube, third is provided on the shell of outer machine Temperature sensor and humidity sensor;Setting second temperature sensor and the purpose of third temperature sensor be, outdoor environment or Any one spot temperature of the first heat-exchange tube of person will all start oil pump close to after frosting temperature, realize in the second heat exchanging pipe Portion's heat kerosene cycle, to prevent frosting on the first heat-exchange tube.
Further, the heating unit is electric heating wire;It in this way can be in oil dropping apparatus by the supply of electric energy itself Heat kerosene is heated, and reduces peripheral hardware mechanism.
Further, photovoltaic electrification component is provided on the outer machine, the electric heating wire and photovoltaic electrification component electric wire connect It connects, forms heating electrical circuit.
In order to greatly reduce the consumption of electric energy, since outer captain's phase is operated in outdoor, in upper installation photovoltaic generation Component had not only saved installation site but also can provide electric energy to electric heating wire by photovoltaic electrification component, and reached energy-efficient purpose.
Further, the photovoltaic electrification component is connected with lithium battery, and the lithium battery is connect with photovoltaic electrification component electric wire, Form charge circuit;The lithium battery is electrically connected to form discharge loop with electric heating wire.In sun-drenched place, by having The electric energy more than needed that photovoltaic electrification component converts is collected and laid in by the excellent lithium battery of charge storage ability.When photovoltaic generation group During the not enough power supply of part conversion, it can be powered by lithium battery to electric heating wire.
Another prioritization scheme, the heating unit include heat conduction vacuum tube, and the heat conduction vacuum tube is communicated in fuel tank, The second oil pump, the heat conduction vacuum tube are provided between the heat conduction vacuum tube and fuel tank, fuel tank and the second oil pump form heating Circulation loop.The radiations heat energy that the sun can be directly collected by heat conduction vacuum tube in this way heats fuel tank, effectively reduces Dependence to the existing energy.
In order to preferably carry out defrost to air-conditioning, this programme also provides a kind of defrosting method, includes the following steps:
Step 1:Detect whether the oil temperature in fuel tank reaches oil temperature preset value by the first temperature sensor;If no Reach oil temperature preset value, start heating electrical circuit to be heated to heat kerosene, until reaching oil temperature preset value, such as have reached Oil temperature preset value will keep the temperature the heat kerosene in fuel tank.
Step 2:By the temperature outside third temperature sensor sensing chamber, the humidity value outside humidity sensor sensing chamber;Together When pass through second temperature sensor detect the first heat-exchange tube on temperature;
Step 3:The smaller value of second temperature sensor and third temperature sensor is taken, when smaller value reaches defrost threshold value, The defrost threshold value is higher than frosting temperature, starts oil pump and carries out defrost;
Step 4:The defrost time is determined according to the humidity value of humidity sensor detection, the defrost time is humidity value 0.2 times of the number of minutes.
Due to area and the difference of period, humidity value is also different, and humidity value will play frosting velocity very big shadow It rings, it was found that humidity value is higher, frosting velocity is faster, so the time used is longer, if the humidity detected at this is 90;That The defrost time is just 18 minutes.
Since the specific heat of water is 4.18KJ/KgK, and it is 2.1KJ/KgK that the specific heat of ice, which is, and ice or frost are melted into 0 at 0 DEG C DEG C water, required heat be 335KJ/KgK, so water once freeze needs ice heat will greatly improve, so lead to Cross above step, the temperature on outdoor machine of air-conditioner and the first heat-exchange tube can be monitored in real time, according to defrost threshold value (defrost threshold value Higher than frosting temperature) comparison, when reach defrost threshold value just start oil pump carry out thermal cycle, to prevent from tying on the first heat-exchange tube Frost more preferably solves the problems, such as air-conditioning frosting, if frost-free, there will not be the situation that air-conditioning shuts down defrost, enhances air-conditioning It is lasting use ability;Pump start is allowed for before non-frosting simultaneously, can thus spend smaller temperature to disperse the The cold air of one heat-exchange tube realizes energy-efficient purpose.
Further, the defrost threshold value in the step 3 is 2~10 degree;The minimum value of this temperature will be above frosting temperature Degree ensures that oil pump starts between this temperature so that the temperature around the first heat-exchange tube is maintained on frosting temperature.
Finally, in order to increase the accuracy of humidity value acquisition, the humidity value in the step 2 be at least acquisition 10 times Average value is divided into 2 seconds between each acquisition time.
Description of the drawings
Fig. 1 is the structure diagram of air-conditioning defrosting device being related in embodiment 1;
Fig. 2 is the structure diagram of air-conditioning defrosting device being related in embodiment 2;
Fig. 3 is the defrosting method flow diagram implemented involved in 3.
Specific embodiment
Embodiment 1:
Air-conditioning defrosting device as shown in Figure 1 including being mounted on outdoor outer machine, is already installed on the outdoor inside outer machine Heat exchanger 1, is provided with the first heat-exchange tube 2 and the second heat-exchange tube 3 in outdoor heat exchanger 1, the first heat-exchange tube 2 with it is empty The compressor reducer of tune is connected and is connected with indoor heat exchanger, and 3 unicom of the second heat-exchange tube is provided with fuel tank 4,4 and second heat of fuel tank Oil pump 7 is connected between exchange pipe 3, the second heat-exchange tube 3, oil pump 7 and fuel tank 4 form closed loop cycle circuit, the second heat exchange Pipe 3 is both provided with insulating layer with 4 outer wall of fuel tank and the circulating line used.Electric heating wire 5 is provided in fuel tank 4, on outer machine Photovoltaic electrification component 6 is provided with, electric heating wire 5 is connected with 6 electric wire of photovoltaic electrification component, forms heating electrical circuit.Photovoltaic generation Component 6 is connected with lithium battery 12, and lithium battery 12 is connect with 6 electric wire of photovoltaic electrification component, forms charge circuit.
After temperature is heated to 220 DEG C of setting in heat kerosene, system stops heating heat kerosene, and photovoltaic electrification component 6 is cut Lithium battery 12 is given to charge.
Filled heat kerosene in fuel tank 4, the first heat-exchange tube 2 and the second heat-exchange tube 3 in outdoor heat exchanger 1 side by side And Double-spiral is mutually wound, the distance between the first heat-exchange tube 2 and the second heat-exchange tube 3 are two centimetres;In fuel tank 4 The first temperature sensor 8 is provided with, for detecting the oil temperature of heat kerosene in mailbox, the second temperature is installed on the first heat-exchange tube 2 Sensor 9 is spent, for detecting the temperature around the first heat-exchange tube 2, third temperature sensor 10 is provided on the shell of outer machine With humidity sensor 11, third temperature sensor is for the real-time temperature values outside sensing chamber;Humidity sensor is used to detect air-conditioning The humidity value of environment where outer machine.
Embodiment 2:
A kind of air-conditioning defrosting device as shown in Figure 2, with differing only in for embodiment 1, heating unit is true using heat conduction Blank pipe 14, heat conduction vacuum tube 14 are communicated in fuel tank 4, and oil pump 7, heat conduction vacuum are provided between heat conduction vacuum tube 14 and fuel tank 4 Pipe 14, fuel tank 4 and oil pump 7 form heat cycles circuit.The radiation of the sun can be directly collected by heat conduction vacuum tube 14 in this way Heat heats the heat kerosene in fuel tank, effectively reduces the dependence to the existing energy.
Embodiment 3:
In order to preferably control the defrosting device involved in embodiment 1 and embodiment 2, the present embodiment provides one kind Defrosting method includes the following steps:
Step 1:Detect whether the oil temperature in fuel tank 4 reaches oil temperature preset value, this implementation by the first temperature sensor 8 The preset value of example setting is 200~220 DEG C;Start heating electrical circuit if not reaching oil temperature preset value, in embodiment 1 to come pair Heat kerosene is heated, and until reaching oil temperature preset value, such as has reached oil temperature preset value, and the heat kerosene in fuel tank will be carried out Heat preservation.
Step 2:By the temperature outside 10 sensing chamber of third temperature sensor, the humidity outside 11 sensing chamber of humidity sensor Value;Humidity value is at least to acquire the average value of 10 times, is divided into 2 seconds between each acquisition time.Pass through second temperature sensor 9 simultaneously Detect the temperature on the first heat-exchange tube.
Step 3:The smaller value of second temperature sensor 9 and third temperature sensor 10 is taken, when smaller value reaches defrost threshold Value, defrost threshold value are higher than frosting temperature, so the defrost threshold value of the present embodiment setting is 3 DEG C, starts oil pump and carry out defrost;
Step 4:The defrost time is determined according to the humidity value of the detection of humidity sensor 11, the defrost time is humidity value 0.2 Times the number of minutes.
Due to area and the difference of period, humidity value is also different, and humidity value will play frosting velocity very big shadow It rings, it was found that humidity value is higher, frosting velocity is faster, so the time used is longer, if the humidity detected at this is 90;That The defrost time is just 18 minutes.

Claims (10)

1. a kind of air-conditioning defrosting device, the outer machine including being mounted on outdoor, the outdoor heat exchanger being already installed on inside outer machine, It is characterized in that:The first heat-exchange tube and the second heat-exchange tube, first heat exchange are provided in the outdoor heat exchanger Pipe connect with the compressor reducer of air-conditioning and is connected with indoor heat exchanger, and the second heat-exchange tube unicom is provided with fuel tank, described Oil pump is connected between fuel tank and the second heat-exchange tube, second heat-exchange tube, oil pump and fuel tank form closed loop cycle circuit, Heating unit is provided in the fuel tank, heat kerosene has been filled in fuel tank, first heat-exchange tube and the second heat-exchange tube exist In heat exchanger side by side and formed Double-spiral.
2. a kind of air-conditioning defrosting device according to claim 1, it is characterised in that:Outside second heat-exchange tube and fuel tank Wall is both provided with insulating layer.
3. a kind of air-conditioning defrosting device according to claim 2, it is characterised in that:The first temperature is provided in the fuel tank Sensor is equipped with second temperature sensor on first heat-exchange tube, third temperature sensing is provided on the shell of outer machine Device and humidity sensor.
4. a kind of air-conditioning defrosting device according to claim 3, it is characterised in that:The heating unit is electric heating wire.
5. a kind of air-conditioning defrosting device according to claim 4, it is characterised in that:Photovoltaic generation is provided on the outer machine Component, the electric heating wire are connected with photovoltaic electrification component electric wire, form heating electrical circuit.
6. a kind of air-conditioning defrosting device according to claim 5, it is characterised in that:The photovoltaic electrification component is connected with lithium Battery, the lithium battery are connect with photovoltaic electrification component electric wire, form charge circuit.
7. a kind of air-conditioning defrosting device according to claim 6, it is characterised in that:The heating unit includes heat conduction vacuum Pipe, the heat conduction vacuum tube are communicated in fuel tank, and the second oil pump, the heat conduction are provided between the heat conduction vacuum tube and fuel tank Vacuum tube, fuel tank and the second oil pump form heat cycles circuit.
8. the defrosting method of the air-conditioning defrosting device as described in claim 3,6 or 7, includes the following steps:
Step 1:Detect whether the oil temperature in fuel tank reaches oil temperature preset value by the first temperature sensor;If do not reach Oil temperature preset value starts heating electrical circuit to be heated to heat kerosene, until reaching oil temperature preset value, such as has reached oil temperature Preset value will keep the temperature the heat kerosene in fuel tank;
Step 2:By the temperature outside third temperature sensor sensing chamber, the humidity value outside humidity sensor sensing chamber;Lead to simultaneously Cross the temperature on second temperature sensor the first heat-exchange tube of detection;
Step 3:The smaller value of second temperature sensor and third temperature sensor is taken, it is described when smaller value reaches defrost threshold value Defrost threshold value is higher than frosting temperature, starts oil pump and carries out defrost;
Step 4:The defrost time is determined according to the humidity value of humidity sensor detection, the defrost time is 0.2 times of humidity value The number of minutes.
9. defrosting method according to claim 8, it is characterised in that:Defrost threshold value in the step 3 is 2~10 degree.
10. defrosting method according to claim 8 or claim 9, it is characterised in that:Humidity value in the step 2 is at least to adopt Collect the average value of 10 times, be divided into 2 seconds between each acquisition time.
CN201810172260.5A 2018-03-01 2018-03-01 A kind of air-conditioning defrosting device and its defrosting method Pending CN108168041A (en)

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CN201810172260.5A CN108168041A (en) 2018-03-01 2018-03-01 A kind of air-conditioning defrosting device and its defrosting method

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Application Number Priority Date Filing Date Title
CN201810172260.5A CN108168041A (en) 2018-03-01 2018-03-01 A kind of air-conditioning defrosting device and its defrosting method

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004177020A (en) * 2002-11-28 2004-06-24 Denso Corp Water heater
US20080041072A1 (en) * 2004-05-12 2008-02-21 Electro Industries, Inc. Heat pump with accumulator at boost compressor output
CN201583074U (en) * 2009-12-17 2010-09-15 张明亮 Solar air-source hot pump for storing electricity and defrosting
CN201819318U (en) * 2010-10-19 2011-05-04 沈学明 Electric auxiliary heating air conditioner
CN103062956A (en) * 2013-01-31 2013-04-24 山东威特人工环境有限公司 Absorption type heat pump with auxiliary defrosting function, and defrosting method thereof
CN106766309A (en) * 2016-12-28 2017-05-31 山东美琳达再生能源开发有限公司 The net for air-source heat pump units and method of segmentation defrosting function are realized using anti-icing fluid
CN104729163B (en) * 2013-12-24 2017-06-06 珠海格力电器股份有限公司 Air-conditioning system and its defrosting control method
CN107036347A (en) * 2017-04-25 2017-08-11 广东海悟科技有限公司 Can intelligent defrosting heat pump air conditioner, the computer-readable recording medium of heat pump air conditioner
CN107166640A (en) * 2017-05-10 2017-09-15 青岛海尔空调器有限总公司 The defrosting control method and air conditioner of air conditioner

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004177020A (en) * 2002-11-28 2004-06-24 Denso Corp Water heater
US20080041072A1 (en) * 2004-05-12 2008-02-21 Electro Industries, Inc. Heat pump with accumulator at boost compressor output
CN201583074U (en) * 2009-12-17 2010-09-15 张明亮 Solar air-source hot pump for storing electricity and defrosting
CN201819318U (en) * 2010-10-19 2011-05-04 沈学明 Electric auxiliary heating air conditioner
CN103062956A (en) * 2013-01-31 2013-04-24 山东威特人工环境有限公司 Absorption type heat pump with auxiliary defrosting function, and defrosting method thereof
CN104729163B (en) * 2013-12-24 2017-06-06 珠海格力电器股份有限公司 Air-conditioning system and its defrosting control method
CN106766309A (en) * 2016-12-28 2017-05-31 山东美琳达再生能源开发有限公司 The net for air-source heat pump units and method of segmentation defrosting function are realized using anti-icing fluid
CN107036347A (en) * 2017-04-25 2017-08-11 广东海悟科技有限公司 Can intelligent defrosting heat pump air conditioner, the computer-readable recording medium of heat pump air conditioner
CN107166640A (en) * 2017-05-10 2017-09-15 青岛海尔空调器有限总公司 The defrosting control method and air conditioner of air conditioner

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Application publication date: 20180615