CN100507384C - Method of preventing indoor heat exchanger bursting by freezing and air cooling cold water set using said method - Google Patents
Method of preventing indoor heat exchanger bursting by freezing and air cooling cold water set using said method Download PDFInfo
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- CN100507384C CN100507384C CNB2005100370014A CN200510037001A CN100507384C CN 100507384 C CN100507384 C CN 100507384C CN B2005100370014 A CNB2005100370014 A CN B2005100370014A CN 200510037001 A CN200510037001 A CN 200510037001A CN 100507384 C CN100507384 C CN 100507384C
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- blower fan
- temperature
- outer blower
- heat exchanger
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Abstract
This invention relates to one method to prevent indoor anti-crack and cooling water set, which comprises the following steps: machine set starts stable operation and tube temperature test indoor exchanger each system minimum temperature is as Tmin as standard temperature; comparing with set temperature; determining wind work gear according to compared results; machine set operates for t minutes and then re-test indoor exchanger cooling tube temperature Y then comparing with minimum tube temperature and re-determining wind work phase till closing set.
Description
Technical field
The present invention relates to a kind of method that prevents indoor heat exchanger bursting by freezing, belong to refrigerating field.
Background technology
At present, it is evaporimeter that the wind-cooled cold-water unit of a lot of companies all adopts plate type heat exchanger, and plate type heat exchanger is the high-efficiency compact heat exchanger, inner flow passage very narrow (2～3mm), so the coefficient of heat transfer is very high.But while steel plate thinner thickness (0.4mm), be easy to during refrigerating operaton occur cross the low plate type heat exchanger inner icing bursting by freezing that causes because of the evaporating temperature that the too small grade of discharge causes, the result of bursting by freezing is that cold-producing medium mixes with water system, can cause parts water inlets such as compressor and condenser when serious, thereby burn out compressor, cause whole system all will scrap, had a strong impact on economic benefit and brand image.Present wind-cooled cold-water unit does not also solve the problem of plate type heat exchanger bursting by freezing effectively.
Summary of the invention
A kind of method that prevents indoor heat exchanger bursting by freezing that provides is provided.This method is the control point with cold-producing medium feed liquor temperature, temperature control plate compares the minimum feed liquor temperature of detected each system and the temperature of setting, master controller is according to the work gear of the outer blower fan of comparative result adjustment, allow outer blower fan variable-speed operation, can improve condensation temperature like this, evaporating temperature is risen, avoid the water freezing in the plate type heat exchanger.
Realize technical scheme of the present invention:
A kind of method that prevents wind-cooled cold-water unit indoor heat exchanger bursting by freezing is characterized in that: comprise the steps:
(1), unit opens, this moment outer blower fan 1 grade of work, treat unit stable operation after, manage the temperature T of warm each system refrigerant pipeline of temperature sensor detection indoor heat exchanger, and each temperature value passed to comparing unit;
(2), the comparing unit temperature value of each system pipeline of indoor heat exchanger relatively, get minimum of a value T
MinAs gcp logic;
(3), set the comparison temperature T at comparing unit
1, T
2, T
3, T
4, Ta and Tb, and T
4＜T
3＜T
2＜T
1＜Ta＜Tb;
(4), comparing unit is with the most tube temperature T
MinCompare with the temperature of setting, and comparative result is passed to master controller, master controller is determined the gear of outer blower fan work according to comparative result;
(5), after outer blower fan gear determines, the wind-cooled cold-water unit moves t minute continuously, the warm temperature sensor of pipe detects the temperature T of each system refrigerant pipeline of indoor heat exchanger again after t minute, temperature control plate is with the most tube temperature T
MinCompare with Ta, Tb, master controller redefines outer blower fan work gear according to comparative result, so repeats, until turning off power supply.
Advantage of the present invention is: method is simple, solved the problem that system's evaporating temperature that correlative factors such as because of environment temperature low or discharge is little cause reduces, thereby effectively prevent the water freezing in the plate type heat exchanger, thereby prevent the plate type heat exchanger bursting by freezing, play antifreeze effect.
Description of drawings
Fig. 1 is the system architecture schematic diagram of wind-cooled cold-water unit;
Fig. 2 is a blower fan speed Control logical flow chart of the present invention.
The specific embodiment
As shown in Figure 1, the wind-cooled cold-water unit comprises at least one compressor 1, outdoor heat exchanger 3, outer blower fan 4, gas-liquid separator 9 and master controller 5, described unit also comprises indoor heat exchanger 6 and the antifreeze mechanism of indoor heat exchanger, different compressors is connected in different refrigerant tubing in the indoor heat exchanger, form different refrigeration systems, the antifreeze mechanism of described indoor heat exchanger comprises a comparing unit 7 and at least one pipe temperature temperature sensor 8, this is managed warm temperature sensor 8 and is positioned on the refrigerant tubing of indoor heat exchanger 6 different systems, be connected with comparing unit 7 by holding wire, this comparing unit 7 is connected in master controller 5 by holding wire and master controller 5 carries out communication.
The user opens unit and carries out refrigerating operaton, and this moment, outer blower fan was in 1 grade of normal position shelves, and arbitrary compressor is when starting in the system, and the pipe temperature temperature sensor of plate type heat exchanger corresponding system pipeline shields 5 minutes, and outer blower fan is kept original state.After the set steady operation, manage warm temperature sensor and begin detector tube temperature T,, then select minimum pipe temperature T if unlatching is a plurality of systems
MinAs gcp logic.Manage warm temperature sensor the pipe Wen WenduT of detected each system is passed to temperature control plate, temperature control plate is selected minimum pipe temperature T
MinCompare with the temperature value of setting, temperature control plate passes to master controller with comparative result, and master controller is selected the gear of outer blower fan operation again according to the result.
As shown in Figure 2, if T
MinGreater than Ta and kept 30 seconds, then outer blower fan is kept original state, and unit continues operation.If T
1＜T
Min≤ Ta and keeping 30 seconds, then outer blower fan directly enters 2 grades of operations; If T
2＜T
Min≤ T
1And kept 30 seconds, then outer blower fan directly enters 3 grades of operations; If T
3＜T
Min≤ T
2And kept 30 seconds, then outer blower fan directly enters 4 grades of operations; If T
4＜T
Min≤ T
3And kept 30 seconds, then outer blower fan directly enters 5 grades of operations; If T
Min≤ T
4And kept 30 seconds, and then stopped the compressor of corresponding system, the compressor of this system is resumed work automatically after 5 minutes, if occur 2 times continuously in 30 minutes, then can not recover automatically, shows failure code, and other system continues operation, and outer blower fan still is positioned at 1 grade of operation.
When through judge for the first time determine outside behind the blower fan gear, the wind-cooled cold-water unit moves t minute continuously, the pipe temperature temperature sensor of each system detector tube channel temp again after t minute, and temperature value T passed to temperature control plate, temperature control plate is with minimum pipe temperature T
MinCompare with Ta, Tb, and comparative result is passed to master controller, master controller redefines outer blower fan gear according to comparative result, so repeats, until turning off unit.
If Ta＜T
Min≤ Tb, then outer blower fan is kept original state, and unit continues operation, and move and manage warm temperature sensor detector tube temperature again after t minute, and then according to Ta, T
Min, Tb relation determine gear; If T
Min≤ Ta, then outer blower fan gear turns to slow-revving next stage gear, and unit is managed warm temperature sensor detector tube temperature again in this gear operation after t minute, and then according to Ta, T
Min, Tb relation determine gear, if be, T is arranged still 5 grades of work
Min≤ Ta, then the compressor of corresponding system quits work, and recovers automatically after 5 minutes, if occur 2 times continuously in 30 minutes, then can not recover automatically, show failure code, the other system compressor continues operation, manages warm temperature sensor detector tube temperature again after t minute, and then according to Ta, T
Min, Tb relation determine gear; If T
MinTb, and then outer blower fan gear turns to high-revolving upper level gear, if be 1 grade of work, then continues to remain on this gear engaged, and unit is managed warm temperature sensor detector tube temperature again in this gear operation after t minute, and then according to Ta, T
Min, Tb relation determine gear.Unit is each gear continuous operation t minute, after t minute, if minimum pipe temperature T
MinMeet Ta＜T
MinThis relation of≤Tb then continues unit and continues to remain on this gear engaged, if do not meet, then adjusts the work gear of exogenous wind machine according to above judgement relation, so repeats, until turning off unit.
The present invention also has some other distortion or improvement, is positioned at other position of refrigerant tubing of indoor heat exchanger as aforementioned tube temperature temperature sensor.If those skilled in the art are subjected to the change or the improvement of the conspicuous unsubstantiality that inspiration of the present invention makes, all belong to the protection domain of claims of the present invention.
Claims (1)
1, prevents the method for wind-cooled cold-water unit indoor heat exchanger bursting by freezing, it is characterized in that comprising the steps:
(1), unit opens, this moment outer blower fan 1 grade of work, treat unit stable operation after, manage the temperature T of warm each system refrigerant pipeline of temperature sensor detection indoor heat exchanger, and each temperature value passed to comparing unit;
(2), the comparing unit temperature value of each system pipeline of indoor heat exchanger relatively, get minimum of a value T
MinAs gcp logic;
(3), set the comparison temperature T at comparing unit
1, T
2, T
3, T
4, Ta and Tb, and T
4＜T
3＜T
2＜T
1＜Ta＜Tb;
(4), comparing unit is with the most tube temperature T
MinCompare with the temperature of setting, and comparative result is passed to master controller, master controller is determined the gear of outer blower fan work according to comparative result;
(4.1), if T
MinGreater than Ta and kept 30 seconds, then outer blower fan continues to enter step 5 then in original gear operation;
(4.2), if T
1＜T
Min≤ Ta and keeping 30 seconds, then outer blower fan directly enters 2 grades of operations, enters step 5 then;
(4.3), if T
2＜T
Min≤ T
1And kept 30 seconds, then outer blower fan directly enters 3 grades of operations, enters step 5 then;
(4.4), if T
3＜T
Min≤ T
2And kept 30 seconds, then outer blower fan directly enters 4 grades of operations, enters step 5 then;
(4.5), if T
4＜T
Min≤ T
3And kept 30 seconds, then outer blower fan directly enters 5 grades of operations, enters step 5 then;
(4.6), if T
Min≤ T
4And kept 30 seconds, and then stopped the compressor of corresponding system, the compressor of this system is resumed work automatically after 5 minutes, if occur 2 times continuously in 30 minutes, then can not recover automatically, show failure code, other system compresses machine continues operation, and outer blower fan still is positioned at 1 grade of operation, enters step 5 then;
(5), after outer blower fan gear determines, the wind-cooled cold-water unit moves t minute continuously, the warm temperature sensor of pipe detects the temperature T of each system refrigerant pipeline of indoor heat exchanger again after t minute, temperature control plate is with the most tube temperature T
MinCompare with Ta, Tb, master controller redefines outer blower fan work gear according to comparative result, so repeats, until turning off power supply;
(5.1) if Ta＜T
Min≤ Tb, then outer blower fan is kept original state, and unit continues operation, and move and manage warm temperature sensor detector tube temperature again after t minute, and then according to Ta, T
Min, Tb relation determine gear;
(5.2) if T
Min≤ Ta, then outer blower fan gear turns to slow-revving next stage gear, manages warm temperature sensor detector tube temperature again after t minute in this gear operation, and then according to Ta, T
Min, Tb relation determine gear, if be, T is arranged still 5 grades of work
Min≤ Ta, then the compressor of corresponding system quits work, and recovers automatically after 5 minutes, if occur 2 times continuously in 30 minutes, then can not recover automatically, show failure code, the other system compressor continues operation, manages warm temperature sensor detector tube temperature again after t minute, and then according to Ta, T
Min, Tb relation determine gear;
(5.3) if T
MinTb, and then outer blower fan gear turns to high-revolving upper level gear, if be 1 grade of work, then continues to remain on this gear engaged, and unit is managed warm temperature sensor detector tube temperature again in this gear operation after t minute, and then according to Ta, T
Min, Tb relation determine gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100370014A CN100507384C (en) | 2005-09-01 | 2005-09-01 | Method of preventing indoor heat exchanger bursting by freezing and air cooling cold water set using said method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100370014A CN100507384C (en) | 2005-09-01 | 2005-09-01 | Method of preventing indoor heat exchanger bursting by freezing and air cooling cold water set using said method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1924469A CN1924469A (en) | 2007-03-07 |
| CN100507384C true CN100507384C (en) | 2009-07-01 |
Family
ID=37817209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100370014A Active CN100507384C (en) | 2005-09-01 | 2005-09-01 | Method of preventing indoor heat exchanger bursting by freezing and air cooling cold water set using said method |
Country Status (1)
| Country | Link |
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| CN (1) | CN100507384C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123287A (en) * | 2016-06-30 | 2016-11-16 | 青岛海尔空调器有限总公司 | A kind of air-conditioner and control method thereof |
| CN106369771A (en) * | 2016-10-31 | 2017-02-01 | 芜湖美智空调设备有限公司 | Control method and control device for air conditioner freezing prevention as well as air conditioner |
| CN106765952A (en) * | 2016-12-23 | 2017-05-31 | 青岛海尔空调器有限总公司 | A kind of air conditioning control method and system |
| CN106839325B (en) * | 2017-02-28 | 2019-07-23 | 广东美的制冷设备有限公司 | Air-conditioner control method, device and air conditioner |
| CN107131598A (en) * | 2017-06-14 | 2017-09-05 | 四川依米康环境科技股份有限公司 | A kind of cooling water air conditioner system |
| CN107906811B (en) * | 2017-10-12 | 2021-11-02 | 青岛海尔空调电子有限公司 | Anti-freezing control method for heat pump unit |
| CN110873435B (en) * | 2018-08-31 | 2021-12-28 | 青岛海尔空调电子有限公司 | Anti-frosting control method for indoor unit of air conditioner |
| CN111189178B (en) * | 2018-11-14 | 2021-09-21 | 重庆海尔空调器有限公司 | Air conditioner and anti-freezing control method thereof |
| CN111189174B (en) * | 2018-11-14 | 2021-09-21 | 重庆海尔空调器有限公司 | Air conditioner and anti-freezing control method thereof |
| CN111189199B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189179B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN110953689B (en) * | 2019-11-14 | 2021-08-24 | 合肥海尔空调器有限公司 | Air conditioner anti-freezing protection method and device and air conditioner |
| CN112050349A (en) * | 2020-08-24 | 2020-12-08 | 珠海格力电器股份有限公司 | Anti-freezing control method, device and equipment and air conditioner |
| CN112283880A (en) * | 2020-09-17 | 2021-01-29 | 珠海格力电器股份有限公司 | Control system and control method for preventing air conditioner from freezing |
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- 2005-09-01 CN CNB2005100370014A patent/CN100507384C/en active Active
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| Publication number | Publication date |
|---|---|
| CN1924469A (en) | 2007-03-07 |
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