CN104482651B - A kind of air friction drag and its defrosting control method - Google Patents
A kind of air friction drag and its defrosting control method Download PDFInfo
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- CN104482651B CN104482651B CN201410845055.2A CN201410845055A CN104482651B CN 104482651 B CN104482651 B CN 104482651B CN 201410845055 A CN201410845055 A CN 201410845055A CN 104482651 B CN104482651 B CN 104482651B
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Abstract
The present invention proposes the air friction drag and its defrosting control method of a kind of highly effective defrosting, the air friction drag includes compressor, condenser, expansion throttling device, evaporator, gas-liquid separator and controller, the exhaust outlet of compressor is connected by the first solenoid valve with the entrance of condenser, the outlet of condenser passes sequentially through device for drying and filtering, second solenoid valve, check valve, expansion throttling device is connected with the entrance of evaporator, the entrance of compressor is connected by gas-liquid separator with the outlet of evaporator, the outlet of compressor is connected with the entrance of expansion throttling device by bypass solenoid valve, the entrance of expansion throttling device passes through third solenoid valve, orifice plate is connected with the outlet of expansion throttling device.Air friction drag area of application range of the invention is wide, defrosting efficiency is high, can solve to bring intractable problem during prior art defrosting, enable the operation of unit long-term safety efficient stable.
Description
Technical field
The present invention relates to air-conditioner sets to heat technical field, more particularly, to a kind of air source heat pump hot water of highly effective defrosting
Unit and its defrosting control method.
Background technology
Heat pump energy-conserving technology has obtained extensive popularization in China, closely as state key power-saving technology promotion project
Year over air friction drag due to the features such as energy saving, safe it is in an increasingly wide range of applications in China.
However, popularization of the air source heat pump in northern China market is greatly limited, main cause is by gas
The restriction of time condition.When outside air temperature is spent it is low when, the surface of air friction drag evaporator will frosting, reduction changes
Thermal effect, leads to that heating capacity reduces or even unit can not normally start.At present, common Defrost mode has fin electrical heating to remove
Frost, heat water-spraying's defrosting, hot gas defrosting and four-way valve defrosting, it is specific as follows：1st, fin electric heated defrosting power consumption does not save greatly
Can, portion of energy can be lost in air, and easily the phenomenon that defrost is difficult occurs when environment temperature is relatively low；2nd, hot water sprays
Leaching defrosting is big to the waste of water resource, and if cannot be in time that remaining water is cleared after water drenching, instead can be in next defrosting process
The middle speed for accelerating frosting；If the 3, hot gas defrosting working medium is not evaporated, gas is just can not form, compressor will be influenced
Air-breathing, if air-breathing is bad, the oil return of compressor is also relatively difficult, and oil return is bad to be likely to burn out compressor；4th, four-way valve removes
Defrosting system cannot can affect heating from indoor absorption heat instead in the reverse cycle defrosting stage to indoor offer heat
Operational efficiency causes water temperature to reduce, and four-way valve frequently commutates can influence its reliability and service life.
Invention content
The purpose of the present invention is to propose to the air friction drag and its defrosting control method of a kind of highly effective defrosting, it
Have the advantages that heat exchange efficiency is high, defrosting speed is fast, energy saving and system is safe and reliable.
The air friction drag of the present invention includes compressor, condenser, expansion throttling device, evaporator, gas-liquid
Separator and the controller of control all parts work, key be the exhaust outlet of the compressor by the first solenoid valve with
The entrance of the condenser is connected, and the outlet of the condenser passes sequentially through device for drying and filtering, second solenoid valve, check valve, swollen
Swollen throttling set is connected with the entrance of the evaporator, and the entrance of the compressor passes through gas-liquid separator and the evaporator
Outlet is connected, and the outlet of the compressor is connected with the entrance of the expansion throttling device by bypass solenoid valve, the expansion
The entrance of throttling set is connected by third solenoid valve, orifice plate with the outlet of expansion throttling device.
Further, for convenience of controlling, the controller includes CPU and data acquisition module, the outlet of the compressor
Equipped with the first pressure sensor being connected with the controller, the entrance of the compressor is equipped with the second pressure being connected with the controller
Force snesor and temperature sensor.
The operation principle of the air friction drag is as follows：
Liquid refrigerant in evaporator absorbs the heat in outer gas, gaseous refrigerant is evaporated to, by gas-liquid separator
After carrying out gas-liquid separation, high temperature and high pressure gas is become by the air entry sucking inside of compressor, then passes through the first solenoid valve
Into in condenser, the liquid refrigerant of high pressure is cooled to by the cold water from user terminal, wherein the heat being pulled away is passed
Feedwater, the water outlet of user terminal just becomes hot water, then liquid refrigerant by device for drying and filtering, second solenoid valve, check valve into
Enter expansion throttling device and become low-pressure, liquid refrigerant to return in evaporator, so as to cycle heating again and again.
The defrosting control method of the air friction drag includes the following steps：When controller is passed by second pressure
When sensor detects that the pressure of suction port of compressor is less than low pressure threshold, controller opens bypass solenoid valve, third solenoid valve, closes
First solenoid valve, second solenoid valve so that the high temperature and high pressure gas of compressor discharge enters swollen after bypass solenoid valve
The frost of evaporator surface using the high temperature refrigerant of compressor discharge is melted and gone by swollen throttling set, third solenoid valve and orifice plate
It removes, then detaches refrigerant air-liquid by gas-liquid separator, gaseous refrigerant is sucked by the air entry of the compressor；Work as control
When device detects that the pressure of suction port of compressor reaches low pressure threshold by second pressure sensor, will open the first solenoid valve,
Second solenoid valve, closes bypass solenoid valve, third solenoid valve, and defrosting process is completed.
Further, during defrosting, if controller detects compressor outlet by first pressure sensor
When pressure is higher than HVT high voltage threshold, the first solenoid valve will be opened, if first will be closed when high pressure reaches HVT high voltage threshold by detecting
Solenoid valve；The will be opened when controller detects that the pressure of suction port of compressor is less than setting value by second pressure sensor
Two solenoid valves if second solenoid valve will be closed when low pressure reaches low pressure threshold by detecting, improve the fortune of unit safety stabilization
Turn performance.
Highly effective defrosting can be achieved in the setting of above-mentioned bypass solenoid valve, third solenoid valve and orifice plate, solves various at present remove
Defect caused by white method.
The condenser is the special condenser of air-source heat pump hot water, has heat exchange efficiency high, is manufactured at low cost excellent
Point.
The air friction drag of the highly effective defrosting of the present invention is solved when running in winter by the shadow of meteorological condition
It rings, is widely portable to the south and north in China；And the small power consumption that defrosts, defrosting time are short and can be in time by water is cleared, heat supply is extensive
Again soon, original hot water temperature can be maintained during defrosting, is avoided that unnecessary energy loss, plays good energy-saving effect,
Improve the comprehensive energy efficiency of unit；And simple system, efficient, service life are long and control is accurate, enable unit long-term
The operation of safe and efficient stabilization, has good market prospects.
Description of the drawings
Fig. 1 is the workflow schematic diagram of the air friction drag of the highly effective defrosting of the embodiment of the present invention.
In figure：1- compressors；The first solenoid valves of 2-；3- condensers；4- devices for drying and filtering；5- second solenoid valves；6- is unidirectional
Valve；7- expansion throttling devices；8- evaporators；9- gas-liquid separators；10- bypass solenoid valves；11- third solenoid valves；12- orifice plates；
13- first pressure sensors；14- second pressure sensors；15- temperature sensors；16- controllers.
Specific embodiment
Below against attached drawing, by the description to embodiment, for example involved to the specific embodiment of the present invention is each
Mutual alignment and connection relation, the effect of each section and operation principle between the shape of component, construction, each section etc. are made into one
The detailed description of step.
Embodiment 1：
As shown in Figure 1：The air friction drag of the highly effective defrosting of the present embodiment, including compressor 1, condenser 3,
Expansion throttling device 7, evaporator 8, gas-liquid separator 9 and the controller 16 of control all parts work.
The exhaust outlet of compressor 1 is connected by the first solenoid valve 2 with the entrance of condenser 3, and the outlet of condenser 3 leads to successively
Device for drying and filtering 4, second solenoid valve 5, check valve 6, expansion throttling device 7 is crossed with the entrance of evaporator 8 to be connected, compressor 1
Entrance is connected by gas-liquid separator 9 with the outlet of evaporator 8, and the outlet of compressor 1 and the entrance of expansion throttling device 7 pass through
Bypass solenoid valve 10 is connected, and the import of expansion throttling device 7 passes through third solenoid valve 11, orifice plate 12 and expansion throttling device 7
Outlet is connected.
Controller 16 includes CPU and data acquisition module, and the outlet of compressor 1 is equipped with the first pressure being connected with controller 16
Force snesor 13, the entrance of compressor 1 are equipped with the second pressure sensor 14 being connected with controller 16 and temperature sensor 15, control
Device 16 processed can accurately control compressor 1 by load start and stop and defrosting process, and equipped with man-machine interface and defencive function etc..
The operation principle of the air friction drag is as follows：
Liquid refrigerant in evaporator 8 absorbs the heat in outer gas, gaseous refrigerant is evaporated to, by the gas-liquid separation
After device 9 carries out gas-liquid separation, high temperature and high pressure gas is become by the air entry sucking inside of the compressor 1, then passes through first
Solenoid valve 2, which enters in the condenser 3, is cooled to the liquid refrigerant of high pressure by the cold water from user terminal, wherein the heat being pulled away
Amount is passed feedwater, and the water outlet of user terminal just becomes hot water, and then liquid refrigerant is by device for drying and filtering 4, second solenoid valve
5th, check valve 6 enters the expansion throttling device 7, becomes low-pressure, liquid refrigerant and returns in the evaporator 8, so as to again and again
Cycle heating.Temperature that the controller 16 is detected according to temperature sensor 15 is precisely controlled opening for expansion throttling device 7
Degree, control refrigerant flow ensure the reliability of unit.
The defrosting control method of the air friction drag is as follows：
When the controller 16 detects that low pressure is less than setting value according to second pressure sensor 14, bypass electricity will be opened
Magnet valve 10, third solenoid valve 11 close the first solenoid valve 2, second solenoid valve 5, the high temperature and high pressure gas warp of the compressor 1 discharge
It crosses bypass solenoid valve 10 while becomes low after being mixed into expansion throttling device 7, third solenoid valve 11 and 12 reducing pressure by regulating flow of orifice plate
Pressure liquid refrigerant is returned in the evaporator 8, using the high temperature refrigerant of the compressor 1 discharge by the frost on 8 surface of evaporator
Melt removal, after then coolant liquid being made to be essentially totally separated with gaseous state by the gas-liquid separator 9, gaseous refrigerant is by this
The air entry sucking of compressor 1, so as to extend the service life of compressor 1.When the controller 16 is according to second pressure sensor
14 when detecting that low pressure reaches setting value, will open the first solenoid valve 2, second solenoid valve, close bypass solenoid valve 10, third
Solenoid valve 11, defrosting process are completed.During defrosting, when the controller 16 detects height by the first pressure sensor 13
The first solenoid valve 2 will be opened when pressure is higher than setting value, if the first solenoid valve will be closed when high pressure reaches setting value by detecting
2；Second solenoid valve will be opened when the controller 16 detects that low pressure is less than setting value by the second pressure sensor 14
5, if second solenoid valve 5 will be closed when low pressure reaches setting value by detecting, improve the behavior in service of unit safety stabilization.
Claims (4)
1. a kind of air friction drag, including compressor, condenser, expansion throttling device, evaporator, gas-liquid separator
And control all parts work controller, it is characterised in that the exhaust outlet of the compressor by the first solenoid valve with it is described
The entrance of condenser is connected, and the outlet of the condenser passes sequentially through device for drying and filtering, second solenoid valve, check valve, expansion joint
Stream device is connected with the entrance of the evaporator, and the entrance of the compressor passes through the outlet of gas-liquid separator and the evaporator
It is connected, the outlet of the compressor is connected with the entrance of the expansion throttling device by bypass solenoid valve, the expansion throttling
The entrance of device is connected by third solenoid valve, orifice plate with the outlet of expansion throttling device.
2. air friction drag according to claim 1, it is characterised in that the controller includes CPU and data
Acquisition module, the outlet of the compressor are equipped with the first pressure sensor being connected with the controller, the entrance of the compressor
Equipped with the second pressure sensor being connected with the controller and temperature sensor.
3. the defrosting control method of air friction drag according to claim 1 or 2, it is characterised in that including such as
Lower step：When controller detects that the pressure of suction port of compressor is less than low pressure threshold by second pressure sensor, controller
Bypass solenoid valve, third solenoid valve are opened, closes the first solenoid valve, second solenoid valve so that the high temperature and pressure of compressor discharge
Gas enters expansion throttling device, third solenoid valve and orifice plate after bypass solenoid valve, the height discharged using compressor
The frost of evaporator surface is melted removal by warm refrigerant, then detaches refrigerant air-liquid by gas-liquid separator, gaseous refrigerant
Agent is sucked by the air entry of the compressor；When controller detects that the pressure of suction port of compressor reaches by second pressure sensor
During low pressure threshold, the first solenoid valve, second solenoid valve will be opened, closes bypass solenoid valve, third solenoid valve, defrosting process is complete
Into.
4. the defrosting control method of air friction drag according to claim 3, it is characterised in that defrosting
Cheng Zhong if controller detects that the pressure of compressor outlet is higher than HVT high voltage threshold by first pressure sensor, will be beaten
The first solenoid valve is opened, if the first solenoid valve will be closed when high pressure reaches HVT high voltage threshold by detecting；When controller passes through the second pressure
Force snesor detects will open second solenoid valve when the pressure of suction port of compressor is less than setting value, if detecting, low pressure reaches
Second solenoid valve will be closed during low pressure threshold.
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| CN201410845055.2A CN104482651B (en) | 2014-12-31 | 2014-12-31 | A kind of air friction drag and its defrosting control method |
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| CN201410845055.2A CN104482651B (en) | 2014-12-31 | 2014-12-31 | A kind of air friction drag and its defrosting control method |
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| CN104482651B true CN104482651B (en) | 2018-06-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436046A (en) * | 2016-05-25 | 2017-12-05 | 广州宝丰冷冻仓储有限公司 | Hot gas defrosting devices and methods therefor for cold storage refrigerating system |
| CN108120039A (en) * | 2016-11-27 | 2018-06-05 | 侴乔力 | The heat pump cycle of compressor Suck and exhaust pressure Fast-Balance after shutdown |
| CN106839518A (en) * | 2017-03-21 | 2017-06-13 | 昆山台佳机电有限公司 | The double cold and hot pump assemblys of integral type |
| CN110595122B (en) * | 2018-06-12 | 2022-03-08 | 浙江盾安机电科技有限公司 | Defrosting control method, device and system for heat pump |
| CN111435050A (en) * | 2019-01-11 | 2020-07-21 | 青岛海尔智能技术研发有限公司 | Refrigerating system and refrigerator |
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| CN2733274Y (en) * | 2004-09-09 | 2005-10-12 | 邵才宝 | Air source heat pump hot-water supply apparatus |
| CN201488418U (en) * | 2009-09-09 | 2010-05-26 | 广东欧科空调制冷有限公司 | Defrosting structure of air source heat pump water heater |
| CN103196262A (en) * | 2013-04-19 | 2013-07-10 | 洛阳中懋环保设备有限公司 | Hot gas bypass defrosting device for air source heat pump water heater |
| CN204388354U (en) * | 2014-12-31 | 2015-06-10 | 昆山台佳机电有限公司 | A kind of air friction drag |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03286979A (en) * | 1990-03-30 | 1991-12-17 | Matsushita Seiko Co Ltd | Defrosting apparatus of air conditioner |
| JP2008304137A (en) * | 2007-06-08 | 2008-12-18 | Mitsubishi Electric Corp | Refrigerating unit |
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- 2014-12-31 CN CN201410845055.2A patent/CN104482651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2733274Y (en) * | 2004-09-09 | 2005-10-12 | 邵才宝 | Air source heat pump hot-water supply apparatus |
| CN201488418U (en) * | 2009-09-09 | 2010-05-26 | 广东欧科空调制冷有限公司 | Defrosting structure of air source heat pump water heater |
| CN103196262A (en) * | 2013-04-19 | 2013-07-10 | 洛阳中懋环保设备有限公司 | Hot gas bypass defrosting device for air source heat pump water heater |
| CN204388354U (en) * | 2014-12-31 | 2015-06-10 | 昆山台佳机电有限公司 | A kind of air friction drag |
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