CN205048565U - Novel accurate refrigeration air conditioner unit - Google Patents
Novel accurate refrigeration air conditioner unit Download PDFInfo
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- CN205048565U CN205048565U CN201520758356.1U CN201520758356U CN205048565U CN 205048565 U CN205048565 U CN 205048565U CN 201520758356 U CN201520758356 U CN 201520758356U CN 205048565 U CN205048565 U CN 205048565U
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Abstract
The utility model discloses a novel accurate refrigeration air conditioner unit, including the off -premises station, middle heat exchange module and indoor end, the off -premises station includes the condensation fan, condenser coil, expansion valve and compressor, middle heat exchange module includes reservoir, plate heat exchanger and refrigerant pump, indoor end includes electrical heating, evaporating coil and indoor fan, compressor, condenser coil, expansion valve and plate heat exchanger loop through the tube coupling, constitute the refrigerant cycle system, reservoir, refrigerant pump, evaporating coil and plate heat exchanger loop through the tube coupling, constitute secondary refrigerant circulation system. Compared with the prior art, the utility model discloses can guarantee invariable cooling blast and accurate air supply temperature, precision instruments application scenario that satisfied refrigeration expected much.
Description
Technical field
The utility model belongs to Refrigeration Technique, relates to a kind of air conditioner in machine room unit, especially a kind of novel accurate refrigeration air-conditioning unit.
Background technology
Existing precision air conditioner product is divided into room-level, row level and fixed point refrigeration-grade.The control mode of precision air conditioner many employings return air temperature of room-level, is directed to whole room and freezes, easily cause the phenomenon of regional uneven air, and cold-hot wind easily mixes, refrigerating efficiency is declined.Precision air conditioner for row level is used for the occasion of cold and hot channel enclosed, and with near cold/heat source, reduce cold consumption, improving refrigerating efficiency is its energy-conservation major measure, and the general return air temperature that adopts controls.To the precision air conditioner of fixed point refrigeration-grade, the general mode adopting return air temperature to control, for the occasion having particular demands or high heat density, localized region cools.The precision air conditioner of row level and fixed point refrigeration-grade is all positioned over server or other equipment sides, makes it have better cooling effect, but due to air supplying distance near, for server or other equipment, overall air-supply can not be even especially.
General precision air conditioner adopts return air temperature to control, and the precision of the requirement wind pushing temperature exceeded.The control accuracy of return air temperature is ± 1%, and this can satisfy condition for occasions such as general machine rooms, but for some more accurate instruments (such as, some medicine equipment, experimental facilities etc.), this is far from being enough.
For these instruments, not only require air-flow of blowing uniformly, and need to control accurate wind pushing temperature.The precision of wind pushing temperature is ± 0.5% even lower.Precision air conditioner for routine can not satisfy condition.
Utility model content
Goal of the invention: for the deficiencies in the prior art, the utility model provides a kind of novel accurate refrigeration air-conditioning unit, to ensure constant cooling blast and accurate wind pushing temperature.
Technical scheme: for achieving the above object, the utility model adopts following technical scheme:
A kind of novel accurate refrigeration air-conditioning unit, comprises off-premises station, intermediate heat transfer module and indoor end; Described off-premises station comprises condensation fan, condenser coil, expansion valve and compressor; Described intermediate heat transfer module comprises reservoir, plate type heat exchanger and refrigerated medium pump; Described indoor end comprises electrical heating, evaporation coil and indoor fan; Described compressor, condenser coil, expansion valve are connected by pipeline successively with plate type heat exchanger, form refrigerant-cycle systems; Described plate type heat exchanger, reservoir, refrigerated medium pump are connected by pipeline successively with evaporation coil, form the refrigerating medium circulatory system.
Further, in order to ensure constant cooling blast, described indoor end adopts the collocation form of multi fan, makes air-flow more even.
Further, described indoor end is provided with ajutage, adopts the mode of air duct blow to meet the temperature requirement in each specific function region and constant cooling blast.
Further, being provided with on the connecting line of described refrigerated medium pump and evaporation coil is connected directly to the branch road of the refrigerating medium entrance of plate type heat exchanger, so that refrigerated medium pump more easily starts, described branch road is provided with valve.
Further, in order to change or easy to maintenance, the inlet/outlet pipe of described refrigerated medium pump is all configured with valve.
Further, described electrical heating adopts controllable silicon controller to carry out PID control to adding heat, by adopting the electrical heating of step-less adjustment, assisting and maintaining constant wind pushing temperature requirement.
Beneficial effect: the utility model is in order to meet accurate wind pushing temperature, and air precision air conditioning system adopts the mode of secondary heat exchange, enters precision air conditioner end carry out heat exchange by refrigerating medium; Meanwhile, use the electrical heating of step-less adjustment, assist and maintain constant wind pushing temperature requirement.And in order to ensure constant cooling blast, precision air conditioner system end adopts the collocation form of multi fan, makes air-flow more even.Meanwhile, the mode of air duct blow is adopted to meet the temperature requirement in each specific function region and constant cooling blast for air conditioning terminal.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
In figure: A-off-premises station, B-intermediate heat transfer module, C-indoor end, 21-condensation fan, 22-condenser coil, 23-expansion valve, 24-compressor, 1-reservoir, 2-plate type heat exchanger, 3-refrigerated medium pump, 4,5,6,10-valve, 31-electrical heating, 32-evaporation coil, 33-indoor fan.
Detailed description of the invention
Below in conjunction with specific embodiment, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, the disclosed a kind of novel accurate refrigeration air-conditioning unit of the utility model embodiment, primarily of off-premises station A, intermediate heat transfer module B and indoor end C forms.Wherein, off-premises station A is primarily of condensation fan 21, and condenser coil 22, the parts such as expansion valve 23 and compressor 24 form.Intermediate heat transfer module B is primarily of reservoir 1, and the parts such as plate type heat exchanger 2 and refrigerated medium pump 3 form.Indoor end C is primarily of electrical heating 31, and the parts such as evaporation coil 32 and indoor fan 33 form.Whole accurate refrigerating and air-conditioning group system comprises two circulations, and one is refrigerant-cycle systems, and one is the refrigerating medium circulatory system.
Refrigerant-cycle systems parts comprise the plate type heat exchanger 2 in off-premises station A and intermediate heat transfer module B.In refrigerant-cycle systems, compressor 24 is positioned at off-premises station, compressor air-discharging enters condenser coil 22 and carries out condensation heat release, by the forced convertion of outdoor condensation fan 21 by heat dissipation in outdoor air environment, through the condensed refrigerant liquid of condenser coil 22 after expansion valve 23 reducing pressure by regulating flow, enter in plate type heat exchanger 2 and carry out evaporation endothermic.At this, plate type heat exchanger 2 is relative to the effect being equivalent to evaporimeter refrigerant circulation.
Refrigerating medium circulatory system parts are by the reservoir 1 in intermediate heat transfer module B, and plate type heat exchanger 2, refrigerated medium pump 3 and pipeline and pipe line parts and indoor end C form.From reservoir 1 refrigerant liquid out, under the effect of refrigerated medium pump 3 supercharging, enter the evaporation coil 32 of indoor end C, the heat in refrigerating medium absorption chamber environment, after evaporating, enter the plate type heat exchanger 2 in intermediate heat transfer module B.At this, plate type heat exchanger 2 is equivalent to the effect of condenser relative to refrigerating medium circulation.
As seen from the above, the air-conditioner set of the present embodiment, in order to ensure the cooling blast of steady temperature, air-conditioning system adopts the mode of secondary heat exchange, and refrigerating medium enters precision air conditioner end and carries out secondary heat exchange.Use secondary heat exchange, can make the refrigerant temperature of end that violent change can not occur, thus make temperature fluctuation amplitude less, stabilization time is very fast.Meanwhile, compensate compressor transition by electrical heating 31 and to freeze the reduction of the temperature brought, to ensure constant wind pushing temperature.Wherein, electrical heating 31 adopts SCR control, carries out PID control, realizes step-less adjustment, to ensure accurate wind pushing temperature to adding heat.The control principle of wind pushing temperature is: compare according to supply air sensor measured value and setting value, draw difference, when absolute difference is greater than return difference, directly exports maximum refrigerating/heating value, until the temperature difference is zero.The output valve of PID is used when actual difference absolute value is within the scope of return difference.When recording temperature and being greater than design temperature, open compressor cooling, and use heating PID adjustment to control constant leaving air temp.P value can make the rapid response error of output, and P value is less, and proportional action is larger; I value can accumulate output to slight error, and eliminate steady-state error, I value is less, and integral action is larger, when being set to zero, does not enable integration; D value can according to the suitable regulation output of the pace of change of temperature, and D value is larger, and the differential action is larger, when being set to zero, does not enable differential.
Establish the inverse circulation line of inverse circulating pump between refrigerated medium pump 3 and reservoir 1, prevent cavitation for cooling motor.Refrigerated medium pump 3 and the branch road being provided with the refrigerating medium entrance being connected directly to plate type heat exchanger 2 on the connecting line of evaporation coil 32, this branch road is provided with valve 10, can adopt magnetic valve.When unit just starts, valve 10 is opened, and makes refrigerating medium carry out shorter circulation, makes refrigerated medium pump 3 be more prone to start, valve-off 10 again after startup.
The probability that refrigerated medium pump 3 breaks down in a device compared with miscellaneous part is higher, in order to easy to maintenance, the inlet/outlet pipe of refrigerated medium pump 3 is all configured with valve (4,5,6), valve can be the manual ball valve of the different size according to pipe diameter size employing, when refrigerated medium pump 3 breaks down, can, by three valve closings, carry out changing or keeping in repair, and do not need the refrigerating medium in whole system all to discharge, then carry out Refilling.
In order to the uniformity of satisfied air-supply and the requirement of each functional area temperature of equipment, the configurable multiple stage indoor fan 33 of indoor end C, and ajutage is set according to functions of the equipments regional location, cold wind is delivered to specific functional area, meets its temperature requirement.The configuration of multi fan makes the wind speed through evaporation coil 32 more even, and meanwhile, add the reliability of unit, when wherein a Fans breaks down time, other blower fan can improve rotation speed of fan automatically, meets the demand of unit air quantity.
Claims (6)
1. a novel accurate refrigeration air-conditioning unit, is characterized in that: comprise off-premises station, intermediate heat transfer module and indoor end; Described off-premises station comprises condensation fan (21), condenser coil (22), expansion valve (23) and compressor (24); Described intermediate heat transfer module comprises reservoir (1), plate type heat exchanger (2) and refrigerated medium pump (3); Described indoor end comprises electrical heating (31), evaporation coil (32) and indoor fan (33); Described compressor (24), condenser coil (22), expansion valve (23) are connected by pipeline successively with plate type heat exchanger (2), form refrigerant-cycle systems; Described plate type heat exchanger (2), reservoir (1), refrigerated medium pump (3) are connected by pipeline successively with evaporation coil (32), form the refrigerating medium circulatory system.
2. refrigeration air-conditioning unit according to claim 1, is characterized in that, described indoor end is configured with multiple stage indoor fan (33).
3. refrigeration air-conditioning unit according to claim 1, is characterized in that, described indoor end is provided with ajutage, for cold wind is delivered to different regions.
4. refrigeration air-conditioning unit according to claim 1, it is characterized in that, described refrigerated medium pump (3) and the branch road being provided with the refrigerating medium entrance being connected directly to plate type heat exchanger (2) on the connecting line of evaporation coil (32), described branch road is provided with valve (10).
5. refrigeration air-conditioning unit according to claim 1, is characterized in that, the turnover pipeline of described refrigerated medium pump (3) is all configured with valve.
6. refrigeration air-conditioning unit according to claim 1, is characterized in that, described electrical heating (31) adopts controllable silicon controller to carry out PID control to adding heat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520758356.1U CN205048565U (en) | 2015-09-28 | 2015-09-28 | Novel accurate refrigeration air conditioner unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520758356.1U CN205048565U (en) | 2015-09-28 | 2015-09-28 | Novel accurate refrigeration air conditioner unit |
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| CN205048565U true CN205048565U (en) | 2016-02-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202632A (en) * | 2015-09-28 | 2015-12-30 | 南京佳力图空调机电有限公司 | Novel accurate refrigeration air conditioning unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202632A (en) * | 2015-09-28 | 2015-12-30 | 南京佳力图空调机电有限公司 | Novel accurate refrigeration air conditioning unit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 211111 Jiangning, Jiangsu, Jiangsu Province, the source of the road No. 88 Patentee after: NANJING CANATAL DATA-CENTRE ENVIRONMENTAL TECH CO., LTD. Address before: 211111 Jiangning, Jiangsu, Jiangsu Province, the source of the road No. 88 Patentee before: Nanjing Canatal Airconditioning Co., Ltd. |