CN101738036B - Water chilling unit with self freeze-proofing function - Google Patents
Water chilling unit with self freeze-proofing function Download PDFInfo
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- CN101738036B CN101738036B CN2009103123835A CN200910312383A CN101738036B CN 101738036 B CN101738036 B CN 101738036B CN 2009103123835 A CN2009103123835 A CN 2009103123835A CN 200910312383 A CN200910312383 A CN 200910312383A CN 101738036 B CN101738036 B CN 101738036B
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- water
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- temperature sensor
- circulating pump
- antifreeze
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Abstract
The invention provides a water chilling unit with the self freeze-proofing function, relating to water chilling units. The invention aims at solving the following problem: circulating pumps are started to operate when the current water chilling units carry out freeze-proofing and the circulating pumps have large power and high system operating cost, cause energy waste and can not be used in other aspects when the units shut down. A condenser is communicated with a first check valve and a second check valve respectively. The second check valve is communicated with a first freeze-proof circulating water pump. The first freeze-proof circulating water pump is communicated with a first water pipe temperature sensor. The first water pipe temperature sensor is communicated with the condenser. An evaporator is communicated with a third check valve and a fourth check valve respectively. The fourth check valve is communicated with a second freeze-proof circulating water pump. The second freeze-proof circulating water pump is communicated with a second water pipe temperature sensor. The second water pipe temperature sensor is communicated with the evaporator. The water chilling unit is used in the multi-heat source heat supply or multi-cold source cold supply systems, or in the common single heat source or single cold source systems.
Description
Technical field
The present invention relates to a kind of handpiece Water Chilling Units.
Background technology
Handpiece Water Chilling Units has two important circulatory systems in design.One is the internal system freon circulatory system, shifts cold or heat by this system; Another is a water circulation system, takes away cold or the heat that unit produces by water circulation system.Be in refrigerating state when operation at unit, vaporizer side water circulation system running temperature is in low state, and especially compressor emergency shutdown the time, if close water circulation system, the recirculated water that stores in unit inside will freeze, thereby causes the evaporimeter bursting by freezing.Therefore prevent unit the freezing of water in the water circulation system under the stopped status, seem very important.
Handpiece Water Chilling Units in the market mainly adopts following safeguard measure: promptly when compressor emergency shutdown, rely on handpiece Water Chilling Units internal water pipeline temperature sensor to control the start and stop of original systemic circulation pump, prevent freezing of unit water system.Because the power of the circulating pump of water circulation system is bigger, therefore will cause the waste of energy and system operation cost to improve.Also make the circulating pump of water circulation system under the situation of compressor emergency shutdown, can not be used for others simultaneously.
Summary of the invention
The objective of the invention is in order to solve existing handpiece Water Chilling Units ON cycle pump operation when antifreeze; the power of circulating pump is big; cause the waste, system operation cost of energy high and under the situation of compressor emergency shutdown circulating pump can not be used for the problem of others, a kind of handpiece Water Chilling Units with self freeze-proofing function has been proposed.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: handpiece Water Chilling Units comprises compressor, condenser, first export pipeline, choke valve, evaporimeter, second export pipeline, the first water lines temperature sensor and the second water lines temperature sensor, the refrigerant outlet of described evaporimeter is communicated with the inlet of compressor, the outlet of described compressor is communicated with the refrigerant inlet of condenser, the refrigerant outlet of described condenser is communicated with the refrigerant inlet of evaporimeter by choke valve, described handpiece Water Chilling Units also comprises the first antifreeze water circulating pump, the second antifreeze water circulating pump, first heating tape, second heating tape, first non-return valve, second non-return valve, the 3rd non-return valve and the 4th non-return valve, the coolant outlet of described condenser is communicated with the import of first non-return valve and the import of second non-return valve respectively by first export pipeline, twine first heating tape on the described export pipeline, the outlet of described second non-return valve is communicated with the import of the first antifreeze water circulating pump, the described first antifreeze recirculated water delivery side of pump is communicated with the first water lines temperature sensor, the described first water lines temperature sensor is communicated with the cooling water inlet of condenser, and the described first water lines temperature sensor is electrically connected with the first antifreeze water circulating pump and first heating tape respectively; The chilled water outlet of described evaporimeter is communicated with the import of the 3rd non-return valve and the import of the 4th non-return valve respectively by second export pipeline, twine second heating tape on described second export pipeline, the outlet of described the 4th non-return valve is communicated with the import of the second antifreeze water circulating pump, the described second antifreeze recirculated water delivery side of pump is communicated with the second water lines temperature sensor, the described second water lines temperature sensor is communicated with the chilled water inlet of evaporimeter, and the described second water lines temperature sensor is electrically connected with the second antifreeze water circulating pump and second heating tape respectively.
The present invention has following beneficial effect: when handpiece Water Chilling Units is shut down, first heating tape and second heating tape the antifreeze adequate heat that provides of handpiece Water Chilling Units is provided; The operation of the first antifreeze water circulating pump and the second antifreeze water circulating pump, prevented the danger of freezing of handpiece Water Chilling Units internal exchanger effectively, need not to rely on handpiece Water Chilling Units internal water pipeline temperature sensor to control the start and stop of original systemic circulation pump simultaneously, first water circulating pump and second water circulating pump can be in closed condition or make other purposes in addition in antifreeze process, and, effectively reduce the antifreeze energy consumption of unit because the power of the first antifreeze water circulating pump, the second antifreeze water circulating pump, first heating tape and second heating tape is lower.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention, and Fig. 2 is the overall schematic of the specific embodiment four.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, the handpiece Water Chilling Units of present embodiment comprises compressor 1, condenser 2, the first export pipeline 2-1, choke valve 3, evaporimeter 4, the second export pipeline 4-1, the first water lines temperature sensor 5 and the second water lines temperature sensor 6, the refrigerant outlet of described evaporimeter 4 is communicated with the inlet of compressor 1, the outlet of described compressor 1 is communicated with the refrigerant inlet of condenser 2, the refrigerant outlet of described condenser 2 is communicated with the refrigerant inlet of evaporimeter 4 by choke valve 3, described handpiece Water Chilling Units also comprises the first antifreeze water circulating pump 7, the second antifreeze water circulating pump 8, first heating tape 9, second heating tape 10, first non-return valve 11, second non-return valve 12, the 3rd non-return valve 13 and the 4th non-return valve 14, the coolant outlet of described condenser 2 is communicated with the import of first non-return valve 11 and the import of second non-return valve 12 respectively by the first export pipeline 2-1, described export pipeline 2-1 goes up and twines first heating tape 9, the outlet of described second non-return valve 12 is communicated with the import of the first antifreeze water circulating pump 7, the outlet of the described first antifreeze water circulating pump 7 is communicated with the first water lines temperature sensor 5, the described first water lines temperature sensor 5 is communicated with the cooling water inlet of condenser 2, and the described first water lines temperature sensor 5 is electrically connected with the first antifreeze water circulating pump 15 and first heating tape 9 respectively; The chilled water outlet of described evaporimeter 4 is communicated with the import of the 3rd non-return valve 13 and the import of the 4th non-return valve 14 respectively by the second export pipeline 4-1, the described second export pipeline 4-1 goes up and twines second heating tape 10, the outlet of described the 4th non-return valve 14 is communicated with the import of the second antifreeze water circulating pump 8, the outlet of the described second antifreeze water circulating pump 8 is communicated with the second water lines temperature sensor 6, the described second water lines temperature sensor 6 is communicated with the chilled water inlet of evaporimeter 4, and the described second water lines temperature sensor 6 is electrically connected with the second antifreeze water circulating pump 8 and second heating tape 10 respectively.
Operation principle: when handpiece Water Chilling Units is in stopped status, when the first water lines temperature sensor, 5 measured temperature values or the second water lines temperature sensor, 6 measured temperature values are lower than the numerical value of its setting, the first water lines temperature sensor 5 is opened first heating tape 9 and the first antifreeze water circulating pump 7, or the second water lines temperature sensor, 6 unlatching second heating tape 10 and the second antifreeze water circulating pumps 8, the recirculated water that store in the handpiece Water Chilling Units this moment has been realized circulation under the effect of the first antifreeze water circulating pump 7 or the second antifreeze water circulating pump 8, heat effect through first heating tape 9 or second heating tape 10, effectively raise the handpiece Water Chilling Units temperature inside, thereby well solved the antifreeze problem of handpiece Water Chilling Units; When the first water lines temperature sensor, 5 measured temperature values or the second water lines temperature sensor, 6 measured temperature values are higher than the numerical value of its setting, the first water lines temperature sensor 5 cuts out first heating tape 9 and the first antifreeze water circulating pump 7, or second water lines temperature sensor 6 close second heating tape 10 and the second antifreeze water circulating pump 8, the recirculated water that stores in the handpiece Water Chilling Units stop the circulation; The flat ribbon cable that heating tape is made of conductive polymer composite (plastics) and two parallel metal wire and insulating sheath, the flat ribbon cable that heating tape is made of conductive polymer composite and two parallel metal wire and insulating sheath, wherein first heating tape 9 is the electrothermal resistance sexual partner torrid zone, and second heating tape 10 is the electrothermal resistance sexual partner torrid zone.
The specific embodiment two: in conjunction with Fig. 1 present embodiment is described, the first water lines temperature sensor 5 of present embodiment is an occasionally thermistor (temperature) sensor of thermoelectricity.
The specific embodiment three: in conjunction with Fig. 1 present embodiment is described, the second water lines temperature sensor 6 of present embodiment is an occasionally thermistor (temperature) sensor of thermoelectricity.
The specific embodiment four: present embodiment is described in conjunction with Fig. 2, this handpiece Water Chilling Units in use, the cooling water inlet of condenser 2 is connected with first magnetic valve 17, first magnetic valve 17 is connected with the 3rd magnetic valve 19 with first water circulating pump 15 respectively, the chilled water inlet of evaporimeter 4 is connected with second magnetic valve 18, second magnetic valve 18 is connected with the 4th magnetic valve 20 with second water circulating pump 16 respectively
When handpiece Water Chilling Units is in normal operating condition, first magnetic valve 17 and second magnetic valve 18 are in open mode, the 3rd magnetic valve 19 and the 4th magnetic valve 20 are in closed condition, and first antifreeze water circulating pump 7, the second antifreeze water circulating pump 8, first heating tape 9 and second heating tape 10 are in off position.Systemic circulation water is pumped to heat exchange in the condenser 2 under the effect of first water circulating pump 15, first non-return valve 11 of flowing through then arrives the hot equipment of using; Simultaneously, opposite side systemic circulation water is pumped to heat exchange in the evaporimeter 4 under the effect of second water circulating pump 16, and the 3rd non-return valve 13 of flowing through then arrives the hot equipment of using.In this process, because the existence of second non-return valve 12 and the 4th non-return valve 14 makes recirculated water can not pass through the first antifreeze water circulating pump 7 and the second antifreeze water circulating pump 8; The flat ribbon cable that heating tape is made of conductive polymer composite (plastics) and two parallel metal wire and insulating sheath, the flat ribbon cable that heating tape is made of conductive polymer composite and two parallel metal wire and insulating sheath, wherein first heating tape 9 is the electrothermal resistance sexual partner torrid zone, and second heating tape 10 is the electrothermal resistance sexual partner torrid zone.
When handpiece Water Chilling Units is in stopped status, first magnetic valve 17 and second magnetic valve 18 are in closed condition, when handpiece Water Chilling Units is in stopped status, when the first water lines temperature sensor, 5 measured temperature values or the second water lines temperature sensor, 6 measured temperature values are lower than the numerical value of its setting, the first water lines temperature sensor 5 is opened first heating tape 9 and the first antifreeze water circulating pump 7, or the second water lines temperature sensor, 6 unlatching second heating tape 10 and the second antifreeze water circulating pumps 8, the recirculated water that store in the handpiece Water Chilling Units this moment has been realized circulation under the effect of the first antifreeze water circulating pump 7 or the second antifreeze water circulating pump 8, heat effect through first heating tape 9 or second heating tape 10, effectively raise the handpiece Water Chilling Units temperature inside, thereby well solved the antifreeze problem of handpiece Water Chilling Units; When the first water lines temperature sensor, 5 measured temperature values or the second water lines temperature sensor, 6 measured temperature values are higher than the numerical value of its setting, the first water lines temperature sensor 5 cuts out first heating tape 9 and the first antifreeze water circulating pump 7, or second water lines temperature sensor 6 close second heating tape 10 and the second antifreeze water circulating pump 8, the recirculated water that stores in the handpiece Water Chilling Units stops circulation, at this moment, first water circulating pump 15 or second water circulating pump 16 are according to user's request, open the 3rd magnetic valve 19 of then corresponding its correspondence of startup or the 4th magnetic valve 20 as needs.
Claims (3)
1. handpiece Water Chilling Units with self freeze-proofing function, described handpiece Water Chilling Units comprises compressor (1), condenser (2), first export pipeline (2-1), choke valve (3), evaporimeter (4), second export pipeline (4-1), the first water lines temperature sensor (5) and the second water lines temperature sensor (6), the refrigerant outlet of described evaporimeter (4) is communicated with the inlet of compressor (1), the outlet of described compressor (1) is communicated with the refrigerant inlet of condenser (2), the refrigerant outlet of described condenser (2) is communicated with the refrigerant inlet of evaporimeter (4) by choke valve (3), it is characterized in that described handpiece Water Chilling Units also comprises the first antifreeze water circulating pump (7), the second antifreeze water circulating pump (8), first heating tape (9), second heating tape (10), first non-return valve (11), second non-return valve (12), the 3rd non-return valve (13) and the 4th non-return valve (14), the coolant outlet of described condenser (2) is communicated with the import of first non-return valve (11) and the import of second non-return valve (12) respectively by first export pipeline (2-1), described export pipeline (2-1) is gone up and is twined first heating tape (9), the outlet of described second non-return valve (12) is communicated with the import of the first antifreeze water circulating pump (7), the outlet of the described first antifreeze water circulating pump (7) is communicated with the first water lines temperature sensor (5), the described first water lines temperature sensor (5) is communicated with the cooling water inlet of condenser (2), and the described first water lines temperature sensor (5) is electrically connected with the first antifreeze water circulating pump (15) and first heating tape (9) respectively; The chilled water outlet of described evaporimeter (4) is communicated with the import of the 3rd non-return valve (13) and the import of the 4th non-return valve (14) respectively by second export pipeline (4-1), described second export pipeline (4-1) is gone up and is twined second heating tape (10), the outlet of described the 4th non-return valve (14) is communicated with the import of the second antifreeze water circulating pump (8), the outlet of the described second antifreeze water circulating pump (8) is communicated with the second water lines temperature sensor (6), the described second water lines temperature sensor (6) is communicated with the chilled water inlet of evaporimeter (4), and the described second water lines temperature sensor (6) is electrically connected with the second antifreeze water circulating pump (8) and second heating tape (10) respectively.
2. according to the described handpiece Water Chilling Units of claim 1, it is characterized in that the first water lines temperature sensor (5) is an occasionally thermistor (temperature) sensor of thermoelectricity with self freeze-proofing function.
3. according to claim 1 or 2 described handpiece Water Chilling Units, it is characterized in that the described second water lines temperature sensor (6) is an occasionally thermistor (temperature) sensor of thermoelectricity with self freeze-proofing function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103123835A CN101738036B (en) | 2009-12-28 | 2009-12-28 | Water chilling unit with self freeze-proofing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103123835A CN101738036B (en) | 2009-12-28 | 2009-12-28 | Water chilling unit with self freeze-proofing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101738036A CN101738036A (en) | 2010-06-16 |
| CN101738036B true CN101738036B (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103123835A Expired - Fee Related CN101738036B (en) | 2009-12-28 | 2009-12-28 | Water chilling unit with self freeze-proofing function |
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| CN (1) | CN101738036B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075848A (en) * | 2013-01-21 | 2013-05-01 | 深圳市庄合地能产业科技有限公司 | Cold and heat balancing system combining lithium bromide set and refrigeration house |
| CN103075842A (en) * | 2013-01-21 | 2013-05-01 | 深圳市庄合地能产业科技有限公司 | Heat and cold balance set |
| CN105571225A (en) * | 2015-12-22 | 2016-05-11 | 梁合 | Control method for anti-freezing function of water source heat pump machine |
| JP6144396B1 (en) * | 2016-09-14 | 2017-06-07 | 伸和コントロールズ株式会社 | Liquid temperature control device and temperature control system |
| CN106440583A (en) * | 2016-11-14 | 2017-02-22 | 广东美的暖通设备有限公司 | Hot water heater of air conditioning heat pump and antifreezing control method therefor |
| 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 |
| CN109340901B (en) * | 2018-10-12 | 2020-08-04 | 上海海立睿能环境技术有限公司 | Anti-freezing control method for low-temperature air source heat pump heating machine |
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2009
- 2009-12-28 CN CN2009103123835A patent/CN101738036B/en not_active Expired - Fee Related
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| CN101738036A (en) | 2010-06-16 |
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Granted publication date: 20110316 Termination date: 20111228 |