CN105571027A - Water chilling unit and control method thereof - Google Patents
Water chilling unit and control method thereof Download PDFInfo
- Publication number
- CN105571027A CN105571027A CN201610035465.XA CN201610035465A CN105571027A CN 105571027 A CN105571027 A CN 105571027A CN 201610035465 A CN201610035465 A CN 201610035465A CN 105571027 A CN105571027 A CN 105571027A
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- evaporative condenser
- compressor
- water chilling
- control method
- chilling units
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a water chilling unit and a control method thereof. The control method of the water chilling unit comprises the steps of S1, determining the actual operation load of a compressor; and S2, comparing the actual operation load with a preset threshold value, starting or stopping one or a plurality of groups of evaporative condensers according to the comparison result. According to the control method of the water chilling unit disclosed by the invention, the problem that the working performance of the water chilling unit is lowered because the actual operation load of the compressor is not matched with the condensation load of the evaporative condensers in the prior art can be solved.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of handpiece Water Chilling Units and control method thereof.
Background technology
Evaporating cold is between air-cooled and water-cooled, be made up of heat exchanger, blower fan, cooling water pump, cool water shower device, its operation principle is: after the high pressure superheater refrigerant gas that compressor is discharged enters evaporative condenser, by circulation cooling water and spray equipment form the uniform moisture film of one deck at heat exchanger surface, heat in cooling moisture film absorption refrigeration agent, evaporation formation steam discharged to ambient air, is realized condensation process by blower fan.
But in the course of work of reality, often there is the actual motion load of compressor and the unmatched problem of condensation load of evaporative condenser, the service behaviour of handpiece Water Chilling Units is reduced.
Summary of the invention
A kind of handpiece Water Chilling Units and control method thereof are provided in the embodiment of the present invention, do not mate with the condensation load of the actual motion load with evaporative condenser that solve compressor in prior art the problem that the service behaviour of handpiece Water Chilling Units is reduced.
For solving the problems of the technologies described above, according to an aspect of the present invention, provide a kind of handpiece Water Chilling Units, comprise the compressor, evaporative condenser assembly and the evaporimeter that set gradually, evaporative condenser assembly comprises multiple evaporative condenser be arranged in parallel, and the parallel branch at each evaporative condenser place is provided with the control valve controlling this parallel branch break-make.
As preferably, the pipeline between evaporative condenser assembly and evaporimeter is in series with ball valve, device for drying and filtering and throttling arrangement successively along the flow direction of cold-producing medium.
According to a further aspect in the invention, provide a kind of control method of above-mentioned handpiece Water Chilling Units, comprising: step S1: the actual motion load determining compressor; Step S2: actual motion load and predetermined threshold value are contrasted, opens according to comparing result or closes one or more groups evaporative condenser.
As preferably, step S1 comprises: the high-pressure detecting exhaust outlet of compressor; Detect the low pressure of compressor air suction mouth; Detect the running current of compressor; According to the actual motion load of the high-pressure detected, low pressure and running current determination compressor.
As preferably, step S2 comprises: as Q≤Q1, opens an evaporative condenser; As Q1 < Q≤Q2, open two evaporative condensers; As Q2 < Q, open more than three evaporative condensers.
As preferably, control method also comprises: step S3: the high-pressure detecting exhaust outlet of compressor; Step S4: high-pressure and predetermined threshold value are compared, and increase according to comparative result or close one or more groups evaporative condenser.
As preferably, step S4 comprises: as Ph≤P1, closes one group of evaporative condenser; As P1 < Ph≤P2, keep current evaporative condenser state; As Ph>P2, increase unlatching one group of evaporative condenser; Return step S1.
As preferably, also comprise before step S1: open compressor, open one group of evaporative condenser; When after compressor stable operation, increase according to water temperature and open evaporative condenser or close evaporative condenser.
As preferably, compressor is adjustable capacity helical-lobe compressor.
As preferably, Q1=50%, Q1 < Q2 < 100%.
According to the control method of handpiece Water Chilling Units of the present invention, comprising: step S1: the actual motion load determining compressor; Step S2: actual motion load and predetermined threshold value are contrasted, opens according to comparing result or closes one or more groups evaporative condenser.During the work of this handpiece Water Chilling Units, can according to the quantity of the evaporative condenser in the operating load adjustment work of compressor, make condensation load and compressor load reach optimum Match, the power consumption that can reduce blower fan and cooling water pump drops into, and improves the service behaviour of handpiece Water Chilling Units.
Accompanying drawing explanation
Fig. 1 is the sectional view of multi-functional group of bond structure of the embodiment of the present invention;
Fig. 2 is to sectional view according to the A-A of the multi-functional group of bond structure of Fig. 1.
Description of reference numerals: 1, compressor; 2, evaporimeter; 3, evaporative condenser; 4, control valve; 5, ball valve; 6, device for drying and filtering; 7, throttling arrangement; 8, oil eliminator.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Please refer to shown in Fig. 1, according to embodiments of the invention, handpiece Water Chilling Units, it is characterized in that, comprise the compressor 1, evaporative condenser assembly and the evaporimeter 2 that set gradually, evaporative condenser assembly comprises multiple evaporative condenser 3 be arranged in parallel, and the parallel branch at each evaporative condenser 3 place is provided with the control valve 4 controlling this parallel branch break-make.
By controlling the break-make of control valve 4, can the number of evaporative condenser 3 of control and participate in evaporative condenser, thus the operating load of the condensation load of evaporative condenser 3 and compressor 1 is matched, the service behaviour of raising handpiece Water Chilling Units.
Pipeline between evaporative condenser assembly and evaporimeter 2 is in series with ball valve 5, device for drying and filtering 6 and throttling arrangement 7 successively along the flow direction of cold-producing medium.Throttling arrangement 7 is such as electric expansion valve.
Preferably, compressor 1 is adjustable capacity helical-lobe compressor, is more convenient to realize the fine adjustment to compressor operating load, and the operating load of compressor can be mated better with the condensation load of evaporative condenser 3.
Evaporimeter 2 is such as shell and tube evaporator.
Control valve 4 is such as magnetic valve.
Oil eliminator 8 is also provided with between compressor 1 and evaporative condenser assembly.
In conjunction with shown in Figure 2, present invention also offers a kind of control method of above-mentioned handpiece Water Chilling Units, comprising: step S1: the actual motion load determining compressor 1; Step S2: actual motion load and predetermined threshold value are contrasted, opens according to comparing result or closes one or more groups evaporative condenser 3.
During the work of this handpiece Water Chilling Units, can according to the quantity of the evaporative condenser 3 in the operating load adjustment work of compressor 1, make condensation load and compressor 1 load reach optimum Match, the power consumption that can reduce blower fan and cooling water pump drops into, and improves the service behaviour of handpiece Water Chilling Units.
Step S1 comprises: the high-pressure detecting compressor 1 exhaust outlet; Detect the low pressure of compressor 1 air entry; Detect the running current of compressor 1; According to the actual motion load of the high-pressure detected, low pressure and running current determination compressor 1.
After the high-pressure Ph of exhaust ports determining compressor 1, just can determine corresponding condensation temperature Tc according to this high-pressure Ph, same, after the low pressure Pl at air entry place determining compressor 1, just can determine corresponding evaporating temperature To according to this low pressure Pl, afterwards just can according to condensation temperature Tc, the running current I of evaporating temperature To and compressor 1 calculates compressor actual motion load Q, i.e. Q=fTo, Tc, I, the evaporative condenser quantity of whole refrigeration system is dropped into according to the value comprehensive descision of Q and Ph, input quantity can be realized by the control valve 4 controlled in respective branch.
Comprise according to the concrete steps that the operation quantity of compressor operating load to evaporative condenser controls: as Q≤Q1, open an evaporative condenser 3; As Q1 < Q≤Q2, open two evaporative condensers 3; As Q2 < Q, open more than three evaporative condensers 3.Preferably, Q1=50%, Q1 < Q2 < 100%.Wherein Q1 and Q2 is the predetermined threshold value of compressor operating load.Certainly, the unlatching quantity of actual evaporation condenser 3 or close number needs and will adjust according to the quantity of measured compressor operating load and the actual evaporative condenser 3 opened, opens one group of evaporative condenser 3 and not to be inevitable requirement at every turn.
Certainly, the value of above-mentioned Q1 and Q2 can adjust according to actual conditions, more operating load threshold value can also be set, a 3rd threshold value Q3 etc. is such as set between Q2 and 100%, can regulate according to the operation quantity of operating load to evaporative condenser 3 of handpiece Water Chilling Units more exactly, realize the optimum Match between evaporative condenser and condenser/evaporator condensation load.
Running relation between quantity by reasonably setting compressor operating load and evaporative condenser, effectively can ensure that the condensation load of compressor operating load and evaporative condenser matches, and ensures the operational energy efficiency of whole handpiece Water Chilling Units.
In order to further improve the service behaviour of whole water chiller, this also needs to control high-pressure Ph, make high-pressure within Ph preset range, thus ensure can realize optimum Match between evaporative condenser and water chiller actual motion state.
The method controlled by detecting the quantity of high-pressure to evaporative condenser 3 comprises: step S3: the high-pressure Ph detecting compressor 1 exhaust outlet; Step S4: high-pressure Ph and predetermined threshold value are compared, and increase according to comparative result or close one or more groups evaporative condenser 3.Control to be being undertaken on the basis after compressor operating load and evaporative condenser quantity Matching by detecting the quantity of high-pressure to evaporative condenser 3, object is within safe range in order to realize at high-pressure, ensure that compressor operating load and evaporative condenser quantity match, also, namely on the basis ensureing handpiece Water Chilling Units safe operation, mating of compressor operating load and evaporative condenser condensation load is realized.
Specifically comprise according to the step that the quantity of high-pressure to evaporative condenser 3 controls: as Ph≤P1, close one group of evaporative condenser 3; As P1 < Ph≤P2, keep current evaporative condenser 3 state; As Ph>P2, increase unlatching one group of evaporative condenser 3, return step S1 afterwards.Wherein P1 and P2 is the predetermined threshold value of high-pressure.By the mode that the working quantity to condenser/evaporator regulates according to high-pressure and compressor operating load repeatedly, can finally meeting in high-pressure control range, realize mating of compressor operating load and evaporative condenser condensation load, make the operation of handpiece Water Chilling Units reach optimum state.
Preferably, also comprise before step S1: open compressor 1, open one group of evaporative condenser 3; When after compressor 1 stable operation, increase according to water temperature and open evaporative condenser 3 or close evaporative condenser 3.When handpiece Water Chilling Units just brings into operation, only open one group of evaporative condenser 3, the low-pressure opening of compressor can be realized, ensure compressor in an initial condition just can preferably with the condensation load matched well of evaporative condenser.After compressor stable operation, just can carry out corresponding adjustment according to the operation quantity of the actual operating state of compressor to evaporative condenser 3, ensure mating between compressor operating load and the condensation load of evaporative condenser 3 further.
Certainly, be more than the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art, under the prerequisite not departing from its general principles, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a handpiece Water Chilling Units, it is characterized in that, comprise the compressor (1), evaporative condenser assembly and the evaporimeter (2) that set gradually, described evaporative condenser assembly comprises multiple evaporative condenser (3) be arranged in parallel, and the parallel branch at each evaporative condenser (3) place is provided with the control valve (4) controlling this parallel branch break-make.
2. handpiece Water Chilling Units according to claim 1, it is characterized in that, the pipeline between described evaporative condenser assembly and described evaporimeter (2) is in series with ball valve (5), device for drying and filtering (6) and throttling arrangement (7) successively along the flow direction of cold-producing medium.
3. a control method for handpiece Water Chilling Units as claimed in claim 1, is characterized in that, comprising:
Step S1: the actual motion load determining compressor;
Step S2: actual motion load and predetermined threshold value are contrasted, opens according to comparing result or closes one or more groups evaporative condenser.
4. the control method of handpiece Water Chilling Units according to claim 3, is characterized in that, described step S1 comprises:
Detect the high-pressure of exhaust outlet of compressor;
Detect the low pressure of compressor air suction mouth;
Detect the running current of compressor;
According to the actual motion load of the high-pressure detected, low pressure and running current determination compressor.
5. the control method of handpiece Water Chilling Units according to claim 3, is characterized in that, described step S2 comprises:
As Q≤Q1, open an evaporative condenser;
As Q1 < Q≤Q2, open two evaporative condensers;
As Q2 < Q, open more than three evaporative condensers.
6. the control method of handpiece Water Chilling Units according to claim 5, is characterized in that, described control method also comprises:
Step S3: the high-pressure detecting exhaust outlet of compressor;
Step S4: high-pressure and predetermined threshold value are compared, and increase according to comparative result or close one or more groups evaporative condenser.
7. the control method of handpiece Water Chilling Units according to claim 6, is characterized in that, described step S4 comprises:
As Ph≤P1, close one group of evaporative condenser;
As P1 < Ph≤P2, keep current evaporative condenser state;
As Ph>P2, increase unlatching one group of evaporative condenser;
Return step S1.
8. the control method of handpiece Water Chilling Units according to claim 3, is characterized in that, also comprises before described step S1:
Open compressor, open one group of evaporative condenser;
When after compressor stable operation, increase according to water temperature and open evaporative condenser or close evaporative condenser.
9. the control method of handpiece Water Chilling Units according to claim 3, is characterized in that, compressor is adjustable capacity helical-lobe compressor.
10. the control method of handpiece Water Chilling Units according to claim 5, is characterized in that, Q1=50%, Q1 < Q2 < 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610035465.XA CN105571027B (en) | 2016-01-19 | 2016-01-19 | Water cooler and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610035465.XA CN105571027B (en) | 2016-01-19 | 2016-01-19 | Water cooler and its control method |
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| Publication Number | Publication Date |
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| CN105571027A true CN105571027A (en) | 2016-05-11 |
| CN105571027B CN105571027B (en) | 2018-12-25 |
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| CN201610035465.XA Active CN105571027B (en) | 2016-01-19 | 2016-01-19 | Water cooler and its control method |
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| CN (1) | CN105571027B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488969A (en) * | 2018-03-23 | 2018-09-04 | 北京百度网讯科技有限公司 | Control method and control device for handpiece Water Chilling Units |
| CN111964189A (en) * | 2020-08-26 | 2020-11-20 | 广东美的暖通设备有限公司 | Control method and device of water chiller, water chiller and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488969A (en) * | 2018-03-23 | 2018-09-04 | 北京百度网讯科技有限公司 | Control method and control device for handpiece Water Chilling Units |
| CN111964189A (en) * | 2020-08-26 | 2020-11-20 | 广东美的暖通设备有限公司 | Control method and device of water chiller, water chiller and storage medium |
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| Publication number | Publication date |
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| CN105571027B (en) | 2018-12-25 |
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