CN101263350A - Refrigerant dehumidification system with variable condenser unloading - Google Patents
Refrigerant dehumidification system with variable condenser unloading Download PDFInfo
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- CN101263350A CN101263350A CNA2005800515810A CN200580051581A CN101263350A CN 101263350 A CN101263350 A CN 101263350A CN A2005800515810 A CNA2005800515810 A CN A2005800515810A CN 200580051581 A CN200580051581 A CN 200580051581A CN 101263350 A CN101263350 A CN 101263350A
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- pipe line
- producing medium
- cold
- refrigeration system
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Abstract
A condenser in a refrigerant system is provided with a plurality of refrigerant circuits, with at least one of the plurality of circuits being equipped with a shut off device. A reheat coil is also incorporated into the refrigerant system to provide enhanced dehumidification functionality. By selectively shutting off at least one of the active refrigerant circuits in the condenser, the amount of heat rejected by the condenser as well as by the reheat coil can be controlled shifting the heat load between the condenser and reheat coil. In this manner, and in combination with operation of the reheat cycle, incremental dehumidification and cooling/heating can be provided and humidity and temperature can be precisely controlled.
Description
Technical field
The present invention relates to a kind of refrigeration system, it has comprised hot merit energy and condenser again, this condenser comprises a plurality of coolant channels, and wherein at least some passages are optionally closed, and distributes with the total heat extraction between control condenser (outdoor section) and the reheater (indoor section).
Background technology
Refrigeration system is used to control the temperature and humidity of air in the various indoor environments of being regulated.In the typical refrigerant system in working in refrigerating mode, cold-producing medium is compressed and is transported to condenser (or being outdoor heat converter in this case) in compressor.In condenser, heat externally exchanges between surrounding air and the cold-producing medium.Cold-producing medium is sent to expansion gear from condenser, and cold-producing medium expand into lower pressure and temperature at the expansion gear place, and the evaporimeter that arrives soon after (or indoor heat converter).In evaporimeter, heat exchanges between cold-producing medium and room air, to regulate room air.When refrigeration system was worked, evaporimeter cooled off the air that those are being supplied to indoor environment.In addition, because the temperature of room air reduces, moisture is also extracted out from air usually.In this way, also can control the humidity level of room air.
The another kind of mode of controlling the environment in this conditioned space with refrigeration system is to utilize reheater (reheat coil).Usually, reheater is arranged in the path of the air of blowing over this evaporimeter top.Air is through the top of this reheater, so that regain heat from cold-producing medium (its temperature is higher than the temperature of the air that leaves evaporimeter).Like this, this reheater can improve the temperature of the air that leaves evaporimeter.Therefore, air is dehumidified in evaporimeter and by supercooling, and then, this air is reheated in this reheater gets back to comfortable temperature.
For known refrigerant systems, another kind of selection is to use by-pass line to reset condenser flow of refrigerant route on every side.In this mode, at least a portion cold-producing medium can be walked around this condenser, the cooling potential when this will reduce it near evaporimeter.In existing systems, this condenser bypass is used with this reheater, enters the thermodynamic state of the cold-producing medium of reheater with control.On the other hand, the size of this condenser passages is arranged to handle the cold-producing medium of the normal volume that flows through this condenser usually, for suitable system functionality and work reliably, should in the scope of environment and condition of work widely, careful control how many cold-producing mediums be arranged through each loop.Further, the pulsation stream (in the situation of using pulsewidth modulation) in the by-pass line can be introduced some undesirable unstability in this refrigerant loop, and this will be restive.Therefore, because the restriction of efficient, discharge pressure (head pressure) control, oil content and other consideration, if having only condenser bypass, then it is of limited application.
Therefore, need a kind of refrigerant dehumidification system, this system has the variable power of heat energy again, and is not more providing reliable and effectively work with marginal cost under the complicated situation.
Summary of the invention
In disclosed embodiment of the present invention, in the refrigeration system that comprises again the hot merit energy, condenser has a plurality of coolant channels, and at least some passages in these passages have stopper.Like this, open when allowing cold-producing medium to flow through this main condenser, discharge less heat by this condenser, and provide the bigger power of heat energy again at the reheater place when less passage.
Can realize the raising of heat energy power again by optionally closing some condenser passages.Like this, can reduce condenser size and condenser duty according to application demand and design restriction.
The subsidiary benefit of another of this design that is provided is, by changing the quantity of effective coolant channel in the condenser, just provides a kind of discharge pressure control naturally, no matter and what mode of operation is.Clearly, the pressure drop on the condenser must remain in the design criteria scope, and, in a disclosed embodiment, can comprise the by-pass line of walking around this condenser, so that additional operating flexibility to be provided.This by-pass line also can be used in combination with this hot again loop.
Can understand these and further feature of the present invention from hereinafter specification and accompanying drawing best, be to brief description of drawings below.
Description of drawings
Fig. 1 shows and comprises first schematic diagram of the present invention;
Fig. 2 shows the schematic diagram of another kind of scheme.
The specific embodiment
A kind of refrigeration system 20 has been shown among Fig. 1, and it comprises compressor 22, and these compressor 22 compressed refrigerants also are delivered to the condenser 24 in downstream with it.Expansion gear 26 is positioned at the downstream of condenser 24, and evaporimeter 28 is positioned at the downstream of expansion gear 26.Cold-producing medium is back to compressor 22 from evaporimeter 28.As shown in the figure, the coolant channel of a plurality of parallel connections (or stream) 30,32 and 34 is by this condenser 24.Stopper (such as valve) 36 is arranged on wherein two streams 32 and 34 of these three streams.Controller is used to open or cuts out this stop valve 36.By-pass line 38 comprises valve 40, and this valve 40 is used for optionally allowing at least a portion cold-producing medium to walk around this condenser 24.
Just as is known, in the needs dehumidifying, use this hot again loop.Basically, control this evaporimeter and the temperature levels of air is cooled to the occupant's temperature desired that is lower than the space of being regulated by refrigeration system 20, so that from air stream, remove the moisture of capacity.Then, the top of this air process reheater 46 cold and that dehumidified, the temperature of reheater 46 (when work) is higher than the temperature of the air that leaves evaporimeter 28.Like this, this reheater is towards hot again this air of occupant's temperature desired in this space of being regulated.Control to reheater is known.
Wish to go to change cooling and/or the moisture removal that is provided sometimes.By the quantity that the refrigerant flow path of this condenser 24 is passed in restriction, can control the heat again that the heat of being discharged by this main condenser 24 and reheater 46 are provided.In this refrigeration system 20, can be by closing this valve 36, opening valve 40 or the two realizes the incremental step of thermal control again.By this way, can change thermic load amount that is added on the condenser and the refrigerant amount that flows through this condenser, the total amount of heat of being discharged can shift between main condenser 24 and reheater 46.By being reduced in the heat that is exchanged in the condenser 24, also can be adjusted in cooling and the moisture removal finished in the evaporimeter 28.
For example, if wish that in the downstream of heat exchanger 46 higher air themperature is arranged, some of then passing in the refrigerant flow path 36 of this main condenser 24 will be cut off or off-line (off-line).As a result, will utilize less heat transfer surface in condenser 24, the pressure reduction that flows through the cold-producing medium of all the other streams 30 can increase synchronously.Thereby although condensation temperature (or blowdown presssure) can raise, gross effect is to have reduced the heat of being discharged by main condenser 24.Because the temperature contrast in the reheater 46 can increase, and the cold-producing medium that leaves this main condenser 24 has higher heat content, and therefore, the heat of discharging in reheater 46 can raise, thereby provides required higher temperature to the air that is supplied to this conditioned environment.Further, valve 40 can be used in combination to guarantee accurately control and safe and reliable work with valve 36.At last, the quantity that includes the stream of stopper 36 can change, and is determined by device type and actual Consideration.
Like this, the controller function valve 36 among the present invention and 40 and valve 42, to realize required cooling and dehumidifying level, this refrigeration system 20 is operated under the heat pattern again simultaneously.
Those of ordinary skill in the art will recognize that above-mentioned these valves should be opened and/or cut out under what conditions.Another subsidiary benefit of the present invention is, by changing the quantity of effective refrigerant flow path in the main condenser, just provides a kind of discharge pressure (head pressure) control naturally, and no matter what mode of operation is.
Fig. 2 shows another system 50, wherein, reheating pipe line 52 extracts cold-producing mediums from triple valve 54, and makes this cold-producing medium be back to the main refrigerant line of condenser 56 upstreams (and a pair of refrigerant flow path 58 of condenser 56 and upstream of 60 passed) by heat exchanger 46 and check-valves 60 again.Only on stream 60, show stop valve 62.Again, the stream quantity that contains valve 62 can change.
The control of this refrigeration system is similar to control to refrigeration system 20.Basically be to open and close this valve 62 to change on the condenser 56 and the therefore thermic load on the reheater 46.
Though two kinds of basic designs of heat again have been shown in Fig. 1 and Fig. 2,, many systems structure also can similarly have benefited from the present invention.
Although disclose the preferred embodiments of the present invention,, those of ordinary skill in the art will recognize that some change also will fall within the scope of the present invention.For this reason, should study following claim to determine true scope of the present invention and content.
Claims (12)
1. refrigeration system comprises:
Compressor, described compressor is by the condenser of discharge pipe line refrigerant conveying to the downstream, and described discharge pipe line is connected with the stream a plurality of in parallel that passes described condenser, and at least one stream in described a plurality of streams has stopper;
The downstream of described condenser is communicated to expansion gear and the downstream of described expansion gear is communicated to the pipeline of evaporimeter, and described evaporimeter is returned the pipeline that is communicated to described compressor; With
Be included in the reheating pipe line in the described refrigeration system, described reheating pipe line receives cold-producing medium, and makes the described cold-producing medium that receives through heat exchanger again, and turns back to the main refrigerant line from described heat exchanger again; Air moving device is used for moving the air of described evaporimeter top and described heat exchanger again top; And controller, be used for selectively opened described stopper, so that realize desirable control with described reheating pipe line.
2. refrigeration system according to claim 1, wherein, a bypass pipeline optionally allows at least a portion cold-producing medium to walk around described condenser, and described by-pass line also comprises bypass valve, and described controller is optionally controlled described bypass valve.
3. refrigeration system according to claim 1, wherein, described reheating pipe line extracts cold-producing medium from the position in described condenser downstream.
4. refrigeration system according to claim 1, wherein, described reheating pipe line extracts cold-producing medium from the position of described condenser upstream.
5. refrigeration system according to claim 4 wherein, enters described a plurality of stream in parallel from the described discharge pipe line bifurcated of described compressor, and described reheating pipe line extracts cold-producing medium from the position of bifurcation upstream.
6. refrigeration system according to claim 1 wherein, at least three described streams are arranged, and at least two streams in described at least three streams has stopper.
7. a method of controlling refrigeration system comprises,
Compressor is provided, and described compressor is carried the condenser of compressed refrigerant to the downstream by discharge pipe line, and described discharge pipe line is connected with the stream a plurality of in parallel that passes described condenser, and at least one stream in described a plurality of streams has stopper;
Cold-producing medium is sent to expansion gear from the downstream of described condenser, and cold-producing medium is sent to evaporimeter from the downstream of described expansion gear, and cold-producing medium is sent back described compressor from described evaporimeter; With
Be included in the reheating pipe line in the described refrigeration system, described reheating pipe line receives cold-producing medium, and makes the described cold-producing medium that receives through heat exchanger again, and turns back to the main refrigerant line from described heat exchanger again; Air moving device is used for moving the air of described evaporimeter top and described heat exchanger again top; And controller, be used for selectively opened described stopper, so that realize desirable control with described reheating pipe line.
8. method according to claim 7, wherein, a bypass pipeline optionally allows at least a portion cold-producing medium to walk around described condenser, and described by-pass line also comprises bypass valve, and described controller is optionally controlled described bypass valve.
9. method according to claim 7, wherein, described reheating pipe line extracts cold-producing medium from the position in described condenser downstream.
10. method according to claim 7, wherein, described reheating pipe line extracts cold-producing medium from the position of described condenser upstream.
11. method according to claim 10 wherein, enters described a plurality of stream in parallel from the described discharge pipe line bifurcated of described compressor, and described reheating pipe line extracts cold-producing medium from the position of bifurcation upstream.
12. method according to claim 7 wherein, at least three described streams are arranged, and at least two streams in described at least three streams has stopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005800515810A CN101263350A (en) | 2005-09-15 | 2005-09-15 | Refrigerant dehumidification system with variable condenser unloading |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005800515810A CN101263350A (en) | 2005-09-15 | 2005-09-15 | Refrigerant dehumidification system with variable condenser unloading |
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| CN101263350A true CN101263350A (en) | 2008-09-10 |
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| CNA2005800515810A Pending CN101263350A (en) | 2005-09-15 | 2005-09-15 | Refrigerant dehumidification system with variable condenser unloading |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571027A (en) * | 2016-01-19 | 2016-05-11 | 珠海格力电器股份有限公司 | Water chilling unit and control method thereof |
| CN109260913A (en) * | 2018-11-22 | 2019-01-25 | 杭州山立净化设备股份有限公司 | A kind of band recovery type heat freezing type drier |
| CN110254161A (en) * | 2018-05-18 | 2019-09-20 | 蔚来汽车有限公司 | For maximizing the purposes of the internal condensation device of total heat system performance |
| CN112594918A (en) * | 2020-12-14 | 2021-04-02 | 青岛海尔空调器有限总公司 | Air conditioner heat exchange system and control method thereof |
| US11530857B2 (en) | 2020-11-10 | 2022-12-20 | Rheem Manufacturing Company | Air conditioning reheat systems and methods thereto |
-
2005
- 2005-09-15 CN CNA2005800515810A patent/CN101263350A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571027A (en) * | 2016-01-19 | 2016-05-11 | 珠海格力电器股份有限公司 | Water chilling unit and control method thereof |
| CN105571027B (en) * | 2016-01-19 | 2018-12-25 | 珠海格力电器股份有限公司 | Water cooler and its control method |
| CN110254161A (en) * | 2018-05-18 | 2019-09-20 | 蔚来汽车有限公司 | For maximizing the purposes of the internal condensation device of total heat system performance |
| CN109260913A (en) * | 2018-11-22 | 2019-01-25 | 杭州山立净化设备股份有限公司 | A kind of band recovery type heat freezing type drier |
| US11530857B2 (en) | 2020-11-10 | 2022-12-20 | Rheem Manufacturing Company | Air conditioning reheat systems and methods thereto |
| CN112594918A (en) * | 2020-12-14 | 2021-04-02 | 青岛海尔空调器有限总公司 | Air conditioner heat exchange system and control method thereof |
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