CN100362293C - Air-cooling hot-pump water cooler set for decreasing working environment temperature - Google Patents
Air-cooling hot-pump water cooler set for decreasing working environment temperature Download PDFInfo
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- CN100362293C CN100362293C CNB2006100498544A CN200610049854A CN100362293C CN 100362293 C CN100362293 C CN 100362293C CN B2006100498544 A CNB2006100498544 A CN B2006100498544A CN 200610049854 A CN200610049854 A CN 200610049854A CN 100362293 C CN100362293 C CN 100362293C
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Abstract
The present invention relates to an air cooled heat pump water cooling unit. Under the condition of high temperature, the existing water cooling unit often can not normally be operated or unloaded. The inner part of the water cooling unit in the present invention is provided with a water spraying device which is formed by that an electromagnetic valve, a water secondary filter, a water atomizing device and a spraying and conveying device are orderly connected. The electromagnetic valve is used as an inlet of the system, and the spraying and conveying device is used as an outlet. A temperature and moisture sensor connected with an electric control system is arranged out of a casing. The water spraying device in the present invention performs a function of reducing the air temperature of an air inlet, the air inlet temperature of the side of a condenser of the unit is reduced by that sprayed drips are evaporated, and the heat exchange temperature difference between the unit condenser and the air is increased; thereby, the heat exchange environment and the heat exchange effect of the side of the unit condenser are improved, the condensing pressure and the complete machine running power of the unit are reduced, the reliability of the unit under the high temperature environment of the summer is improved, and the energy saving function can be obviously realized.
Description
Technical Field
The invention relates to an air-cooled heat pump water chilling unit, in particular to an air-cooled heat pump water chilling unit capable of reducing the working environment temperature of the air-cooled heat pump water chilling unit.
Background
The climate type used by the air conditioner in China at present belongs to the T1 type, the summer refrigeration operation limit temperature of the air conditioner is 43 ℃ according to the relevant national standard, and the air conditioner manufacturing enterprises carry out production and manufacturing according to the standard. However, due to the variety of climate in China, the temperature increase in high temperature in summer and the increase of the number of continuous days, and the installation position of the air conditioner, the environmental temperature is often higher than 43 ℃ in practical use, and in the season where the air conditioner is most needed, the unit can not normally operate or be unloaded, which brings inconvenience to users, and brings great difficulty to after-sales service of manufacturers, so that some manufacturers try to improve the operation range through the design of a refrigeration system, but considering the cost factor and the characteristics of an air conditioner compressor system, the improved temperature is very limited and is about 2-3 ℃. In addition, the limited temperature increase cannot be realized due to the restriction of the installation position of the air conditioner. Thus, such problems cannot be completely solved by the optimal design of the refrigeration system. Meanwhile, the long-term operation of the unit under the summer high-temperature working condition not only influences the reliability and the service life of the unit, but also greatly increases the operation energy consumption. At present, some methods for solving the problem of energy saving in high-temperature operation of the air conditioner in summer are also available. The key points of the two methods are only put on an energy-saving scheme of self condensed water recovery and utilization of the split air conditioner, the condensed water is used for cooling the condenser, and meanwhile, the research on the reliability problem of the air conditioner during operation is less. Although these solutions are feasible in principle, they have more or less problems in terms of practical effects and application feasibility: the split type air conditioner may be installed at a position where condensed water cannot or is not easily received to the condenser of the outdoor unit; the energy-saving effect is related to the amount of condensed water and the heat exchange effect between the condensed water and the condenser, the amount of the condensed water is related to the starting time and the indoor temperature and humidity, and the amount of the condensed water is unstable; the heat exchange effect is directly related to the heat exchange form, most of the existing conditions are that condensed water flows through fins, the condensed water is simply subjected to heat transfer, the heat exchange coefficient is not high, a small number of the condensed water and the fins are adopted for heat exchange, the heat exchange effect is poor due to the limitation of the adopted method and the split air conditioner structure, the diameter of fog drops in the water mist is large, the fog drops are not evaporated on the fins, and the heat exchange effect is equivalent to or even worse than that of the condensed water directly flowing through the fins. Meanwhile, the split air conditioner belongs to household appliances with fierce price competition at present, and the cost factor is sensitive. For the reasons of feasibility and cost, although the technical idea is proposed for a long time, the split-type air conditioner using the technology is not seen in the market at present. Meanwhile, the energy-saving scheme is only discussed and used in the field of split air conditioners, and is never discussed and used in the industry of large air-cooled heat pump units at present. Along with the increasing use of large-scale air-cooled heat pump water chilling unit in the project of building at present, this kind of unit also faces two big problems of reliability and the energy consumption increase of high temperature operation in summer, because its use occasion generally is public occasion and the energy consumption of unit accounts for the characteristics that the total energy consumption of building is big, the problem that faces is more outstanding.
Disclosure of Invention
The invention aims to provide an air-cooled heat pump water chilling unit capable of reducing the working environment temperature in summer, compared with the existing air-cooled heat pump water chilling unit, the unit has the advantages that the weather resistance of the unit to a high-temperature environment in summer is obviously improved, the refrigerating operation reliability of the unit in summer can be greatly improved, and the obvious energy-saving characteristic is realized.
The invention comprises a box body, wherein an outdoor condenser, a compressor, a throttling component, an electric control system, an outdoor fan system and a water-cooling heat exchanger are arranged in the box body to form a refrigerating system of the water chilling unit, and a water spraying device is arranged in the water chilling unit. The water spraying device is formed by sequentially connecting an electromagnetic valve, a water fine filtering device, a water atomizing device and a spraying conveying device. The electromagnetic valve is the inlet of the system, and the spray delivery device is the outlet of the system. The box body is internally provided with a refrigerating system water inlet interface, a refrigerating system water outlet interface and a water inlet interface of the water spraying device, wherein the refrigerating system water inlet interface and the refrigerating system water outlet interface are connected with the tail end of the air conditioning system, and the water inlet interface of the water spraying device is connected with a water source. The box body is also externally provided with a temperature and humidity sensor which is connected with an electric control system, and the electric control system is connected with a controlled electric component of the water chilling unit.
The water atomization device is any one of an ultrasonic wave spraying device, a centrifugal spraying device and a high-pressure plunger pump spraying device which can generate fog drops with the diameter of 20-100 mu m. Ultrasonic spraying device, centrifugal atomizer, high pressure plunger pump atomizer are all ripe product, can obtain through the market.
The water spraying device plays a role in reducing the air temperature at the air inlet, reduces the air inlet temperature at the condenser side of the unit through the evaporation of sprayed droplets, and improves the heat exchange temperature difference between the condenser of the unit and the air, so that the heat exchange environment and the heat exchange effect at the condensing side of the unit are improved, the condensing pressure of the unit and the power of the whole running machine are reduced, the reliability of the unit in a high-temperature environment in summer is improved, and the water spraying device can obviously play a role in energy conservation.
Drawings
1. FIG. 1 is a schematic structural view of the present invention;
2. FIG. 2 is a schematic view of a water atomizer configuration;
3. FIG. 3 is a flowchart of a water atomizer control mechanism.
Detailed Description
As shown in fig. 1 and 2, the present invention includes a tank 1, and an outdoor condenser 3, a compressor 13, a throttling component 12, an electric control system 8, an outdoor fan system 2, and a water-cooled heat exchanger 11 are disposed in the tank 1, and form a refrigeration system of the water chilling unit. The water chilling unit is internally provided with a water spraying device which is formed by sequentially connecting an electromagnetic valve 15, a water fine filtering device 14, a water atomizing device 6 and a spraying conveying device 5. The solenoid valve 15 is the system inlet and the spray delivery device 5 is the system outlet. A refrigerating system water inlet interface 9, a refrigerating system water outlet interface 10 and a water inlet interface 7 of a water spraying device are arranged in the box body 1. The refrigerating system water inlet interface 9 and the refrigerating system water outlet interface 10 are connected with the tail end of the air conditioning system, and the water inlet interface 7 of the water spraying device is connected with a water source. The box body 1 is also externally provided with a temperature and humidity sensor 4, the temperature and humidity sensor 4 is connected with an electric control system 8, and the electric control system 8 is connected with a controlled electric component of the water chilling unit.
When the unit operates in a high-temperature environment in summer, the temperature and the relative humidity of ambient air are firstly measured by the unit, the wet bulb temperature is obtained through calculation of a controller of the unit, namely, the theoretical lowest temperature to which the unit can reduce the air through a water spraying device is determined, and the dry-wet bulb temperature difference delta T is calculated. The unit measures the running current I of the compressor after starting up through the sampling device 0 According to analysis, the energy consumption of the unit is reduced by 3% when the ambient dry-bulb temperature is reduced by 1 ℃, and the running power of the unit before and after the temperature is reduced can be reduced according to the relation0.03 × Δ T × P less Before cooling The controller can obtain the lowest running current through calculation because the running voltage of the unit is not changedI G . Meanwhile, according to the air conditioning principle, the controller can calculate the maximum water consumption flow Q required by cooling on line MAX Liter/hour (L/h). Has the lowest running current I G Maximum water consumption Q MAX And then, the controller can periodically sample the current value of the compressor and calculate the change rate of the current value along with time, and the two parameters can control the spray volume of the water spraying device in a fuzzy control mode, so that the effects of reducing the air inlet temperature of the unit and the energy consumption of the unit and saving the water consumption are achieved.
From the above, it can be seen that: ratio of energy savings
η＝0.03×ΔT＝0.03×(T Dry matter -T Wet ) (1)
Operating power after cooling will reduce eta promptly, because the voltage and the load of unit are unchangeable, the energy-conserving back electric current will reduce eta, promptly:
η＝(I 0 -I G )/I 0
wherein I 0 The current working current (unit: ampere, A), I of the compressor of the air conditioning unit is obtained by sampling after starting G The lowest current (unit: ampere, A) which can be reached by the compressor of the air conditioning unit when the energy-saving device works; the following can be obtained:
I G ＝I 0 ×(1-η) (2)
I G is the steady state control target that the following fuzzy control algorithm needs to achieve.
1. Input variables are:
EI: is the error I of the working current and the target current C -I G ，I C Is the current operating current measured (in amperes, A). Generally, the operating power of the air conditioning unit varies from 70% to 130% of the rated power, so the actual variation range of the current error is set to [ -0.3 ir, 0.3 i [ ] R ]A，I R Is the rated current (A) of the air conditioning unit/compressor.
EIC: the calculation formula is expressed by formula (3) as the change rate of the working current:
the sampling period of the current may be set to 5 minutes, and the actual range of the rate of change of the operating current may be set to [ -0.0003, +0.0003] A/s.
2. Output variables are:
u: an adjustment value Δ F (L/s) of the spray Flow rate (Flow); let the actual variation range of the spray flow be [ -Q ] MAX /6，+Q MAX /6]，Q MAX The calculated maximum water consumption flow (unit: liter/hour, L/h) for temperature reduction.
3. Quantization factor:
and if the domain ranges of the input and output variables are { -3, -2, -1,0,1,2,3}, then:
EI quantization factor Kei =10/IR;
quantization factor Keic =10000 for EIC;
quantization factor Ku = Q for U MAX /18；
The actual output spray flow F can be derived from a scaling equation:
F＝F 0 +ΔF＝F 0 +Ku×U (4)
F 0 can be taken from Q MAX /6。
4. And (3) a control algorithm:
a fuzzy control algorithm with 2 adjusting factors is adopted, and the control rule is as follows (5):
wherein, take alpha 0 ＝0.3，α 1 =0.7, the primary task of fuzzy control is to eliminate the current error EI when it is large, in which case the weighting of the current error in the control law should be large, and therefore, α is taken 1 =0.7; on the contrary, when the current error is small, the system is close to the steady state, and the primary task of the system is to be controlledTo stabilize the system as quickly as possible, the overshoot must be reduced, so that the weighting of the current error change EIC in the control law should be increased. Thus, take α 0 ＝0.3。
The control mechanism program of the water spraying device is shown in figure 3, wherein the threshold temperature refers to the outdoor environment temperature for starting the spraying energy-saving device, is generally 35-37 ℃, and can be set on site according to actual conditions. And when the ambient temperature is lower than the threshold temperature, the working environment does not need to be improved, and the working of the spraying device is stopped. Otherwise, the spraying device needs to be started to work so as to reduce the temperature of the air inlet side of the outdoor unit.
Claims (2)
1. The air-cooled heat pump water chilling unit capable of reducing the temperature of the working environment of the air-cooled heat pump water chilling unit comprises a box body, wherein an outdoor condenser, a compressor, a throttling component, an electric control system, an outdoor fan system and a water-cooled heat exchanger are arranged in the box body to form a refrigerating system of the water chilling unit, and the air-cooled heat pump water chilling unit is characterized in that a water spraying device is arranged in the water chilling unit; the water spraying device is formed by sequentially connecting an electromagnetic valve, a water fine filtering device, a water atomizing device and a spraying conveying device, wherein the electromagnetic valve is an inlet of the water spraying device, and the spraying conveying device is an outlet of the water spraying device; a refrigerating system water inlet interface, a refrigerating system water outlet interface and a water spraying device water inlet interface are arranged in the box body, wherein the refrigerating system water inlet interface and the refrigerating system water outlet interface are connected with the tail end of the air conditioning system, and the water spraying device water inlet interface is connected with a water source; a temperature and humidity sensor is arranged outside the box body and connected with an electric control system, and the electric control system is connected with a controlled electric component of the water chilling unit.
2. The air-cooled heat pump water chilling unit capable of reducing the temperature of the working environment of the air-cooled heat pump water chilling unit according to claim 1, wherein the water atomizing device is one of an ultrasonic spraying device, a centrifugal spraying device and a high-pressure plunger pump spraying device capable of generating droplets with the diameter of 20-100 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100498544A CN100362293C (en) | 2006-03-15 | 2006-03-15 | Air-cooling hot-pump water cooler set for decreasing working environment temperature |
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| CNB2006100498544A CN100362293C (en) | 2006-03-15 | 2006-03-15 | Air-cooling hot-pump water cooler set for decreasing working environment temperature |
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| CN1818511A CN1818511A (en) | 2006-08-16 |
| CN100362293C true CN100362293C (en) | 2008-01-16 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230649A (en) * | 2011-07-11 | 2011-11-02 | 王如东 | Air-cooled heat pump unit |
| CN104298111B (en) * | 2014-09-28 | 2017-02-01 | 重庆工商职业学院 | Fuzzy control method for kiln thermal parameter control system |
| CN107631376B (en) * | 2017-10-10 | 2022-11-25 | 河北工业大学 | Air cooling module unit based on cooling airflow spray cooling |
| CN116755486A (en) * | 2022-09-30 | 2023-09-15 | 江苏拓米洛高端装备股份有限公司 | Incubator control system and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02118345A (en) * | 1988-10-28 | 1990-05-02 | Matsushita Seiko Co Ltd | Air conditioner |
| CN2099933U (en) * | 1991-08-16 | 1992-03-25 | 湖北省纺织工业总公司 | Spraying water cooling additional device for window type air conditioner |
| US6129285A (en) * | 1998-08-11 | 2000-10-10 | Schafka; Mark Louis | System and method for air humidification |
| CN2415294Y (en) * | 2000-01-06 | 2001-01-17 | 华南理工大学 | Dripless humidity adjusting device for air conditioner |
| CN2583557Y (en) * | 2002-11-07 | 2003-10-29 | 葛云震 | Spray cooling energy-saving device for condenser for air conditioner |
| CN2708192Y (en) * | 2004-04-11 | 2005-07-06 | 禹长春 | Underground air heat pump central air-conditioner |
| CN1702390A (en) * | 2005-03-25 | 2005-11-30 | 葛永乐 | Water spray cooling split air conditioner |
| CN2879055Y (en) * | 2006-03-15 | 2007-03-14 | 杭州电子科技大学 | Wind-cooling hot pump water-cooling machine set |
-
2006
- 2006-03-15 CN CNB2006100498544A patent/CN100362293C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02118345A (en) * | 1988-10-28 | 1990-05-02 | Matsushita Seiko Co Ltd | Air conditioner |
| CN2099933U (en) * | 1991-08-16 | 1992-03-25 | 湖北省纺织工业总公司 | Spraying water cooling additional device for window type air conditioner |
| US6129285A (en) * | 1998-08-11 | 2000-10-10 | Schafka; Mark Louis | System and method for air humidification |
| CN2415294Y (en) * | 2000-01-06 | 2001-01-17 | 华南理工大学 | Dripless humidity adjusting device for air conditioner |
| CN2583557Y (en) * | 2002-11-07 | 2003-10-29 | 葛云震 | Spray cooling energy-saving device for condenser for air conditioner |
| CN2708192Y (en) * | 2004-04-11 | 2005-07-06 | 禹长春 | Underground air heat pump central air-conditioner |
| CN1702390A (en) * | 2005-03-25 | 2005-11-30 | 葛永乐 | Water spray cooling split air conditioner |
| CN2879055Y (en) * | 2006-03-15 | 2007-03-14 | 杭州电子科技大学 | Wind-cooling hot pump water-cooling machine set |
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Owner name: WELLCOME HICON INDUSTRIAL CO. Free format text: FORMER OWNER: HANGZHOU ELECTRONIC SCIENCE AND TECHNOLOGY UNIV. Effective date: 20080801 |
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Effective date of registration: 20080801 Address after: Industrial Zone, Si Zhen Town, Yuyao, Zhejiang Patentee after: Ningbo Hicon Industry Co., Ltd. Address before: No. 2 street, Xiasha Higher Education Zone, Hangzhou, Jianggan District, Zhejiang Patentee before: Hangzhou Electronic Science and Technology Univ |
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