CN100439847C - Plate-type heat exchanger antifreeze apparatus and control method thereof - Google Patents
Plate-type heat exchanger antifreeze apparatus and control method thereof Download PDFInfo
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- CN100439847C CN100439847C CNB2004100103199A CN200410010319A CN100439847C CN 100439847 C CN100439847 C CN 100439847C CN B2004100103199 A CNB2004100103199 A CN B2004100103199A CN 200410010319 A CN200410010319 A CN 200410010319A CN 100439847 C CN100439847 C CN 100439847C
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Abstract
The present invention relates to a plate-type anti-freezing apparatus for a heat exchanger and a control method of the plate-type anti-freezing apparatus. The present invention comprises a water side-plate type heat exchanger, a water pump, two temperature sensors and a heating device, wherein the water pump and one temperature sensor are arranged at the water inlet of the heat exchanger, the heating device winds at the periphery of the water side-plate type heat exchanger, and the other temperature sensor is arranged at the water outlet of the heat exchanger; the temperature sensors are connected with the signal input end of a control circuit, and two control outputs of the control circuit are correspondingly connected with two switching elements for respectively controlling the water pump and the heating device to start and stop. The present invention detects the water temperature of the water side-plate type heat exchanger via the temperature sensors, controls an electric heater and a circulating water pump to start and stop via a controller, and carries the heat of the electric heater away via the circulating water pump so as to prevent the water side-plate type heat exchanger and water pipes from frost cracking. The present invention greatly raises the reliability of an air conditioner set and prolongs the service life of a heat pump. In the present invention, the heat of the auxiliary electric heater on the water side-plate type heat exchanger can be fully utilized, and the present invention has high thermal efficiency and convenient application.
Description
Technical field
The present invention relates to a kind of family air-cooled heat pump, relate in particular to a kind of air-cooled heat pump brazing plate type heat exchanger preventing freeze in winter device, simultaneously, also relate to a kind of control method of this device, it belongs to the HVAC technical field.
Background technology
The family with Air-Cooled Heat Pump Unit since have indoor temperature control flexibly, the water pipe soft advantage such as comfortable of little, air-supply that takes up room, obtained using widely in places such as villas.The present family air-cooled heat pump that uses, its main frame is made up of compressor, cross valve, gas-liquid separator, air side heat exchanger, throttle mechanism, water-side heat (mostly being plate type heat exchanger), water pump, expansion tank, water flow switch etc.In the household air conditioning that uses at present, when compressor emergency shutdown, when using in the winter time; the fault that occurs water side board type heat exchanger bursting by freezing through regular meeting; and water side board type heat exchanger bursting by freezing will cause the collapse of whole refrigeration system, and therefore, anti-sealing side board type heat exchanger bursting by freezing is significant.Several means to prevent freezings commonly used at present are: at the single cooler group, manufacturer puts the water in the water system totally to user family before organizing distributors to arrive in the winter time (1); (2) at source pump, by being set, temperature sensor detects water temperature, and start compressor then water side board type heat exchanger is heated.Above-mentioned two kinds of precautionary measures all have some defectives: for the single cooler group, the untimely bursting by freezing that is difficult to prevention of water side board type heat exchanger discharges water; For source pump, start compressor and need consume lot of energy, utilization efficiency of heat energy is low.Therefore, above-mentioned several method all is difficult for applying.
Summary of the invention
At the problems referred to above, the object of the present invention is to provide a kind of plate type heat exchanger defroster, to reach the purpose of preventing freeze in winter.
Simultaneously, the present invention also aims to provide a kind of control method of this device.
In order to achieve the above object, technical program of the present invention lies in having adopted a kind of plate type heat exchanger defroster, comprise water side board type heat exchanger, water inlet place at heat exchanger is provided with a water pump, water inlet place at heat exchanger is provided with a temperature sensor, periphery at water side board type heat exchanger is wound with heater, delivery port place at heat exchanger also is provided with a temperature sensor, temperature sensor links to each other with the signal input part of a control circuit, and two of control circuit control output are corresponding with two switching devices continuously to be controlled the startup of water pump and heater respectively and stop.
Described heater is an electric heater.
The control method of this plate type heat exchanger defroster may further comprise the steps:
(1) when the detected water temperature of temperature sensor is lower than 2 ℃, start water pump, make the water system cycle operation;
(2) when the detected water temperature of temperature sensor is lower than 1 ℃, start electrical auxiliary heater and water pump, make the water system cycle operation;
(3) when the detected water temperature of temperature sensor is higher than 8 ℃, stop the work of electrical auxiliary heater and water pump.
Owing to be wound with electric heater with the periphery of air-cooled heat pump water side board type heat exchanger at the family, detect the water temperature of water side board type heat exchanger by temperature sensor, control the start-stop of electric heater and water circulating pump by controller, utilize water circulating pump to take away the heat of electric heater, come the bursting by freezing of prevention of water side board type heat exchanger and water pipe, improve the reliability of air-conditioning unit greatly, prolonged the service life of heat pump.Among the present invention, the heat of the electrical auxiliary heater on the water side board type heat exchanger can be fully used, and thermal efficiency height is easy to apply.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
The specific embodiment
As shown in Figure 1, defroster of the present invention comprises compressor 1, cross valve 2, water side board type heat exchanger 3, the refrigeration throttle part 4 that check valve 41 and throttle capillary tube 42 are formed, the refrigeration throttle part 5 that check valve 51 and throttle capillary tube 52 are formed, air-side heat exchanger 6, fan and motor 7, gas-liquid separator 8, water pipe 12, periphery at water side board type heat exchanger 3 is wound with electrical auxiliary heater 11, be provided with temperature sensor 9 and water circulating pump 10 at the water in-out port place of water side board type heat exchanger 3, detect the water temperature of water side board type heat exchanger 3, and control the start-stop of electric heater 11 and water circulating pump 10 by controller by temperature sensor 9.
It is as follows that unit of the present invention is under the off-mode start-stop control method of electric heater 11 and water circulating pump 10:
(1) when temperature sensor 9 detected water temperatures are lower than 2 ℃, start water circulating pump 10, make the water system cycle operation;
(2) when temperature sensor 9 detected water temperatures are lower than 1 ℃, start electrical auxiliary heater 11 and water circulating pump 10, make the water system cycle operation;
(3) when temperature sensor 9 detected water temperatures are higher than 8 ℃, close electric heater 11 and water circulating pump 10.
When freeze with Air-Cooled Heat Pump Unit summer in the family, the cold that cold-producing medium carries passes to the circulated refrigerated water that water circulating pump 10 is carried by the heat exchange effect of brazing plate type heat exchanger 3, chilled water is transported to the room conditioning end equipment by pipeline 12, realizes the air conditioner refrigerating function.At this moment, antifreeze electric heater 11 does not start, and only starts water circulating pump 10.
When Air-Cooled Heat Pump Unit winter heating was used at the family, the heat that cold-producing medium carries passed to the recirculated water that water circulating pump 10 is carried by the heat exchange effect of brazing plate type heat exchanger 3, and recirculated water is transported to the room conditioning end equipment by pipeline 12, realizes the heating function.At this moment, antifreeze electrical auxiliary heater 11 does not start, and only starts water circulating pump 10.
When winter, the family was in stopped status with Air-Cooled Heat Pump Unit; detect the height of water temperature according to temperature sensor 9; determine whether ON cycle water pump 10 and electrical auxiliary heater 11 according to the top control method of mentioning, realize protective effect, and prevent that circulation waterway from freezing brazing plate type heat exchanger.
Claims (3)
1, a kind of plate type heat exchanger defroster, comprise water side board type heat exchanger, water inlet place at heat exchanger is provided with a water pump, it is characterized in that: the water inlet place at heat exchanger is provided with a temperature sensor, periphery at water side board type heat exchanger is wound with heater, delivery port place at heat exchanger also is provided with a temperature sensor, the temperature sensor at heat exchanger water inlet place all links to each other with the signal input part of a control circuit with the temperature sensor at delivery port place, and two of control circuit control output are corresponding with two switching devices continuously to be controlled the startup of water pump and heater respectively and stop.
2, plate type heat exchanger defroster according to claim 1 is characterized in that: described heater is an electric heater.
3, a kind of control method of plate type heat exchanger defroster, it is characterized in that: the heat exchanger water inlet place at device is provided with a temperature sensor, periphery at water side board type heat exchanger is wound with heater, delivery port place at heat exchanger also is provided with a temperature sensor, the temperature sensor at heat exchanger water inlet place all links to each other with the signal input part of a control circuit with the temperature sensor at delivery port place, two of control circuit control output are corresponding with two switching devices continuously to be controlled the startup of water pump and heater respectively and stops, and its control method may further comprise the steps:
(1) when the detected water temperature of temperature sensor is lower than 2 ℃, start water pump, make the water system cycle operation;
(2) when the detected water temperature of temperature sensor is lower than 1 ℃, start heater and water pump, make the water system cycle operation;
(3) when the detected water temperature of temperature sensor is higher than 8 ℃, stop the work of heater and water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100103199A CN100439847C (en) | 2004-06-04 | 2004-06-04 | Plate-type heat exchanger antifreeze apparatus and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100103199A CN100439847C (en) | 2004-06-04 | 2004-06-04 | Plate-type heat exchanger antifreeze apparatus and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1704712A CN1704712A (en) | 2005-12-07 |
| CN100439847C true CN100439847C (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100103199A Expired - Fee Related CN100439847C (en) | 2004-06-04 | 2004-06-04 | Plate-type heat exchanger antifreeze apparatus and control method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN100439847C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101264429B1 (en) * | 2006-09-01 | 2013-05-14 | 엘지전자 주식회사 | Water Cooling Type Air Conditioner |
| KR100894471B1 (en) * | 2007-08-06 | 2009-04-22 | 엘지전자 주식회사 | Clothe dryer |
| KR101464758B1 (en) * | 2008-08-04 | 2014-11-24 | 엘지전자 주식회사 | Method for controlling hot water circulation system associated with heat pump |
| CN101761999B (en) * | 2009-09-11 | 2012-07-25 | 沃姆制冷设备(上海)有限公司 | Energy-saving automatic anti-freezing controlling method for household central air conditioner and air-conditioner adopting same |
| US9395125B2 (en) * | 2011-09-26 | 2016-07-19 | Trane International Inc. | Water temperature sensor in a brazed plate heat exchanger |
| CN104457396A (en) * | 2014-11-19 | 2015-03-25 | 珠海格力电器股份有限公司 | Anti-freezing method and system for heat exchanger |
| CN104807141B (en) * | 2015-04-28 | 2017-10-17 | 广东美的暖通设备有限公司 | A kind of multi-joint mechanism air conditioner system control method and its system |
| CN105571225A (en) * | 2015-12-22 | 2016-05-11 | 梁合 | Control method for anti-freezing function of water source heat pump machine |
| CN106765889A (en) * | 2016-11-29 | 2017-05-31 | 重庆美的通用制冷设备有限公司 | Air-conditioning and its pipeline antifreeze control method and device |
| CN107192184B (en) * | 2017-05-25 | 2019-11-05 | 重庆美的通用制冷设备有限公司 | The antifreeze method, apparatus and water-cooling screw rod unit of water-cooling screw rod unit |
| CN108488825A (en) * | 2018-05-14 | 2018-09-04 | 江苏康大联合节能科技有限公司 | Nonmetallic flue gas heat-exchange unit preventing freeze in winter system |
| CN111707031B (en) * | 2020-05-25 | 2021-06-11 | 广东纽恩泰新能源科技发展有限公司 | Heat pump unit starting control method and system |
| CN112728978A (en) * | 2020-12-31 | 2021-04-30 | 浙江中广电器股份有限公司 | Air conditioning system with plate heat exchanger and anti-freezing control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2380848Y (en) * | 1999-07-20 | 2000-05-31 | 海尔集团公司 | Heat-pump type air-conditioner with auxiliary defrosting device |
| CN2524163Y (en) * | 2002-02-01 | 2002-12-04 | 李进龙 | Counterflow pipe coiled heat exchanger |
| JP2003314838A (en) * | 2002-04-24 | 2003-11-06 | Sanyo Electric Co Ltd | Heat pump type hot water heating device |
-
2004
- 2004-06-04 CN CNB2004100103199A patent/CN100439847C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2380848Y (en) * | 1999-07-20 | 2000-05-31 | 海尔集团公司 | Heat-pump type air-conditioner with auxiliary defrosting device |
| CN2524163Y (en) * | 2002-02-01 | 2002-12-04 | 李进龙 | Counterflow pipe coiled heat exchanger |
| JP2003314838A (en) * | 2002-04-24 | 2003-11-06 | Sanyo Electric Co Ltd | Heat pump type hot water heating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1704712A (en) | 2005-12-07 |
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