CN101910762A - Use of an adjustable expansion valve to control dehumidification - Google Patents
Use of an adjustable expansion valve to control dehumidification Download PDFInfo
- Publication number
- CN101910762A CN101910762A CN2008801248736A CN200880124873A CN101910762A CN 101910762 A CN101910762 A CN 101910762A CN 2008801248736 A CN2008801248736 A CN 2008801248736A CN 200880124873 A CN200880124873 A CN 200880124873A CN 101910762 A CN101910762 A CN 101910762A
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- CN
- China
- Prior art keywords
- refrigeration system
- drying
- overheated
- pattern
- evaporimeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007791 dehumidification Methods 0.000 title abstract description 4
- 239000003507 refrigerant Substances 0.000 claims abstract description 11
- 238000005057 refrigeration Methods 0.000 claims description 41
- 238000001035 drying Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims 11
- 238000007599 discharging Methods 0.000 claims 4
- 230000001143 conditioned effect Effects 0.000 abstract description 7
- 238000004378 air conditioning Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/21—Refrigerant outlet evaporator temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A refrigerant system is provided with a control for its expansion device. The control operates the expansion device to adjust the superheat of the refrigerant leaving an evaporator to have desired dehumidification for air being delivered into an environment to be conditioned.
Description
Technical field
The application relates to a kind of refrigeration system that combines adjustable expansion valve, and more particularly, relates to a kind of refrigeration system, and wherein this adjustable expansion valve is controlled to obtain drying of requirement in the environment of climate controlled.This type of representative instance that can adjust expansion gear is an electric expansion valve.
Background technology
Refrigeration system is at HVAC﹠amp; R (heating, ventilation, air-conditioning and refrigeration) is known in the field, and operation to be running through closed loop refrigerating circuit compression and the circulating refrigerant that connects a plurality of parts, thereby adjusting will be transported to a secondary fluid in climate controlled space.In basic refrigeration system, cold-producing medium compresses from the lower pressure to the elevated pressures in compressor, and is delivered to heat rejection heat exchanger (condenser or gas cooler).High-pressure refrigerant typically flow to expansion gear from the heat rejection heat exchanger that cold-producing medium is transferred to surrounding environment from heat, it expand into lower pressure and temperature herein, and be passed to hot joining then and receive heat exchanger (evaporimeter), refrigerant cools will be delivered to a secondary fluid of conditioned environment herein.Cold-producing medium turns back to compressor from evaporimeter.A kind of common example of refrigeration system is an air-conditioning system, and air-conditioning system operation is to regulate the air that (cooling and often dry) will deliver into climate controlled zone or space.
Refrigeration system is utilized to provide temperature control to the air that infeeds living environment, and often is used to provide humidity control.To the reliable of refrigeration system and effectively a very important feature of operation be leave evaporimeter and shift to compressor cold-producing medium cross heat.Typically, in the overheated scope that must remain on that is defined as the actual temperature of cold-producing medium and the difference between the saturation temperature for the compactness of the most efficient and reliability service of refrigeration system.In addition, for the control of pure temperature, accurately sensing and the minimum safe kept are crossed heat and operation the most efficiently also is typical to refrigeration system with can be under the environment of wide region and service condition.Because a variety of causes, overheated needs remain on above zero some degree, and it typically maintains in from 6 to 12 the low scope.
The control of evaporator superheat has been provided for multiple function, yet evaporator superheat also is not controlled to control drying of the air that is transported into the environment that will regulate.
Summary of the invention
In a disclosed embodiment of the present invention, the control that is used for electric expansion valve (EXV) is implemented in the refrigerant superheat of the expectation at evaporator outlet place, makes that offering the drying of air that delivers into conditioned environment by refrigeration system can control.In one embodiment, if the cooling load of the minimizing that expectation is provided by refrigeration system then only entered " drying " pattern of thermal control.In another embodiment, when moving continuously when " drying " pattern that entered thermal control or under " drying " pattern of thermal control excessively, must satisfy the different condition of the reliability service that is used for refrigeration system, such as exhaust temperature in specific respective range and saturated inlet temperature.
These and other characteristics of the present invention can be understood best by following detailed description and accompanying drawing, hereinafter are brief description.
Description of drawings
Fig. 1 is the explanatory view in conjunction with basic refrigeration system of the present invention.
Fig. 2 is the example of the simplified flow chart of one embodiment of the present of invention.
The specific embodiment
Fig. 1 has shown refrigeration system 20, and it is in conjunction with being used for compressed refrigerant and it being transported to down the compressor 22 of swimming over to heat rejection heat exchanger 24.Cold-producing medium passes through electric expansion valve 26 from heat rejection heat exchanger 24, and arrives evaporimeter 30 then.As shown, the air that moves through evaporimeter 30 is transfused to the environment 32 that will regulate.The environment of regulating 32 is provided with controller 33, and this controller allows the occupant that desired temperatures and/or the humidity level who is provided by the air of importing this environment is provided.
Shown the controller 28 that is used for electric expansion valve 26.And transducer or other sensor 34 and 36 are presented on the positions different in the refrigeration system 20.As shown, transducer 34 is located at the downstream of compressor, but and sensing in the pressure and/or the temperature of discharge place of compressor 22.Similarly, but the pressure and/or the temperature in sensor 36 sensing evaporimeters 30 downstreams.Sensor 34 and 36 signal offer controller 28.Should be noted that in these sensors some are optionally, and can not need for the particular system structure.
The controller that operation comes to obtain in the downstream of evaporimeter 30 superheat value of expectation with the control electronic expansion device is known.Typically, be in the reliability that keeps compressor 22, to obtain performance (total capacity and efficient) for refrigeration system 20 expectations, with expectation evaporator superheat control to low on the occasion of, typically in from 6 to 12 scope.
Yet in the present invention, the inventor has recognized that, by being increased in the overheated dehumidification ability that causes compressor 30 to increase under the specific environment, and causes importing the lower humidity of the air of conditioned environment 32 again.Therefore, the present invention utilizes its control to expansion gear 26 to obtain drying of the increase under specific environment at least.
Should be noted that when overheated increase the total capacity of evaporimeter 30 descends, take place simultaneously from showing the synchronous capacity transfer of parts (sensible compoenent) to the parts (latent component) of diving.As a result, the sensible heat ratio that is provided by evaporimeter 30 (ratio that shows capacity and total capacity) reduces.Therefore, if desired, by increasing evaporator superheat, the operation of refrigeration system 20 can concentrate on more to provide and dry, and all the apparent capacity of cooling is unwanted.Therefore in other words, the sensible heat ratio of evaporimeter 30 can and be adjusted at overheated control the in evaporimeter 30 exits by control electric expansion valve 26.Therefore, the total capacity of evaporimeter and its apparent parts and latent parts can be controlled by control electric expansion valve 26.
Overheatedly be provided for drying of guaranteeing to expect from what the feedback of sensor 34 and 36 can be used for guaranteeing increasing, and simultaneously can be near any unreliable or unsafe operational limit.For example, the overheat range of expectation can be limited by the lower limit and the upper limit, and lower limit is by the minimum of a value restriction of evaporator pressure (or saturation temperature), and the upper limit is limited by the exhaust temperature threshold value.As is known, unusual low steam pressure can cause that evaporimeter freezes, and too high exhaust temperature can cause compressor injury.
As shown in Figure 2, controller 28 can normally be operated to obtain best overheated under conventional refrigerating mode of expectation, for example, provides maximum performance (capacity and efficient) to be delivered to the air of conditioned environment 32 with cooling to refrigeration system 20.Yet at least under the situation of the apparent cooling load that requires to reduce, for example, when the fully low or/and apparent cooling load in conditioned environment 32 of environment temperature was little, controller 28 entered " drying " pattern of thermal control.In this " dried " pattern, controller 28 can be controlled expansion gear 26, made overheated being adjusted, so that the capacity of evaporimeter 30 shifts to dry (to lower sensible heat ratio) from cooling, reduced the humidity that delivers into the air of wanting control band 32.Given the application's described above target those skilled in the art will recognize that how to control electronic expansion device 26, comprises keeping the operation of refrigeration system 20 in safe and reliable boundary.
Should be noted that thermal control can suck or the execution of compressor discharge place at compressor.Under the situation that compressor sucks, can carry out at position rather than evaporator outlet towards the compressor suction.In addition, be known if suck relation overheated and that discharge between overheated, cross thermal control and can carry out at the compressor discharge place.In addition, even can't control by evaporator superheat under the situation about accurately reaching the humidity level of expectation, the humidity level still can significantly reduce towards desired value, offers occupant's higher degree comfortable of conditioned space.
Should be noted that and to use a lot of different type of compressor in the present invention.For example, can adopt vortex, screw, rotary or reciprocating compressor.Utilize refrigeration system of the present invention to can be used in many different application, include but not limited to fixed and movable air conditioner system and heat pump.This refrigeration system also can adopt steam injection, liquid injection, multiloop and with the parallel connected compressor of series connection pattern.
Although disclose embodiments of the invention, those skilled in the art will recognize that some modification will locate within the scope of the invention.Therefore, appended claims should be studied to determine true scope of the present invention and content.
Claims (22)
1. refrigeration system comprises:
Compressor, it is used for compressed refrigerant and it is transported to the downstream entering heat rejection heat exchanger, by can adjusting expansion gear, and passes through evaporimeter then before turning back to described compressor from the cold-producing medium of described heat rejection heat exchanger; With
Controller, it is used for the described expansion gear of adjusting, and described controller can move to be controlled at drying in the environment that will regulate by controlling the described expansion gear of adjusting.
2. refrigeration system according to claim 1 is characterized in that, the described control of drying is formed by changing refrigerant superheat.
3. refrigeration system according to claim 2 is characterized in that, described be superheated to suck overheated and discharging is overheated one of them.
4. refrigeration system according to claim 1 is characterized in that, described drying is controlled at maximum and can accepts the limit is arranged on overheated.
5. refrigeration system according to claim 1 is characterized in that, the described expansion gear of adjusting is an electric expansion valve.
6. refrigeration system according to claim 1 is characterized in that, described controller is provided at the feedback of at least one measured value in the described refrigeration system.
7. refrigeration system according to claim 6 is characterized in that, described feedback comprises from one of them the feedback at the pressure and temperature measured value of discharging place of described compressor.
8. refrigeration system according to claim 6, it is characterized in that described feedback comprises from one of them the feedback at one of them the locational pressure and temperature measured value that is being selected from following column position: evaporimeter, compressor or between described evaporimeter and described compressor.
9. refrigeration system according to claim 1, it is characterized in that described controller has the pattern of drying, under this pattern, whole when showing cooling capacity when what do not require described refrigeration system, described cold-producing medium overheated so that drying of expectation to be provided of described evaporimeter left in described controller increase.
10. refrigeration system according to claim 1, it is characterized in that, described controller has the pattern of drying, under this pattern, whole when showing cooling capacity when what do not require described refrigeration system, described cold-producing medium overheated so that the sensible heat ratio of expectation to be provided of described evaporimeter left in described controller increase.
11. refrigeration system according to claim 1, it is characterized in that, described controller has the pattern of drying, under this pattern, whole when showing cooling capacity when what do not require described refrigeration system, described cold-producing medium overheated with the latent refrigerating capacity that expectation is provided and the apparent refrigerating capacity of expectation of described evaporimeter left in described controller increase.
12. the method for a running refrigerating system comprises the steps:
(a) compressed refrigerant and it is transported to the downstream enter heat rejection heat exchanger by can adjusting expansion gear, and passed through evaporimeter from the described cold-producing medium of described heat rejection heat exchanger then before being returned to compressor; With
(b) the described expansion gear of adjusting of control controls drying in the environment that will regulate by controlling the described expansion gear of adjusting.
13. method according to claim 12 is characterized in that, described controller is provided at the feedback of at least one measured value in the described refrigeration system.
14. method according to claim 13 is characterized in that, described feedback comprises from one of them the feedback at the discharging place pressure and temperature measured value of described controller.
15. method according to claim 13, it is characterized in that described feedback comprises from one of them the feedback at one of them the locational pressure and temperature measured value that is being selected from following column position: evaporimeter, compressor or between described evaporimeter and described compressor.
16. method according to claim 12, it is characterized in that, whole when showing cooling capacity when what do not require described refrigeration system, described controller enters the pattern of drying, and described cold-producing medium overheated so that drying of expectation to be provided of described evaporimeter left in described controller increase under this pattern.
17. method according to claim 12, it is characterized in that, whole when showing cooling capacity when what do not require described refrigeration system, described controller enters the pattern of drying, and described cold-producing medium overheated so that the sensible heat ratio of expectation to be provided of described evaporimeter left in described controller increase under this pattern.
18. method according to claim 12, it is characterized in that, whole when showing cooling capacity when what do not require described refrigeration system, described controller enters the pattern of drying, and described cold-producing medium overheated with the latent refrigerating capacity that expectation is provided and the apparent refrigerating capacity of expectation of described evaporimeter left in described controller increase under this pattern.
19. method according to claim 12 is characterized in that, the described control of drying is formed by changing refrigerant superheat.
20. method according to claim 13 is characterized in that, described overheated one of them that is suction is overheated and discharging is overheated is individual.
21. method according to claim 12 is characterized in that, described dry be controlled at maximum can accept overheated restricted.
22. method according to claim 12 is characterized in that, the described expansion gear of adjusting is an electric expansion valve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2008/050832 WO2009088517A1 (en) | 2008-01-11 | 2008-01-11 | Use of an adjustable expansion valve to control dehumidification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101910762A true CN101910762A (en) | 2010-12-08 |
Family
ID=40853353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801248736A Pending CN101910762A (en) | 2008-01-11 | 2008-01-11 | Use of an adjustable expansion valve to control dehumidification |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20100242508A1 (en) |
| CN (1) | CN101910762A (en) |
| WO (1) | WO2009088517A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011046803A2 (en) | 2009-10-14 | 2011-04-21 | Carrier Corporation | Dehumidification control in refrigerant vapor compression systems |
| CN103512145B (en) * | 2012-06-19 | 2016-08-31 | 珠海格力电器股份有限公司 | The control method of a kind of air conditioning unit electric expansion valve and adjusting means |
| US10556484B2 (en) * | 2015-10-28 | 2020-02-11 | Ford Global Technologies, Llc | Vehicle climate control valve and operating method |
| US10488083B2 (en) * | 2015-12-18 | 2019-11-26 | Friedrich Air Conditioning Co., Ltd. | Variable refrigerant package |
| WO2018062316A1 (en) * | 2016-09-30 | 2018-04-05 | ダイキン工業株式会社 | Air conditioner |
| US10415856B2 (en) * | 2017-04-05 | 2019-09-17 | Lennox Industries Inc. | Method and apparatus for part-load optimized refrigeration system with integrated intertwined row split condenser coil |
| US10274213B2 (en) * | 2017-05-01 | 2019-04-30 | Haier Us Appliance Solutions, Inc. | Air conditioning system including a hybrid reheat loop |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5664425A (en) * | 1991-03-08 | 1997-09-09 | Hyde; Robert E. | Process for dehumidifying air in an air-conditioned environment with climate control system |
| JP2002061922A (en) * | 2000-08-14 | 2002-02-28 | Fujitsu General Ltd | Method for contorlling air conditioner |
| US6427454B1 (en) * | 2000-02-05 | 2002-08-06 | Michael K. West | Air conditioner and controller for active dehumidification while using ambient air to prevent overcooling |
| CN1645017A (en) * | 2003-10-17 | 2005-07-27 | Lg电子株式会社 | Apparatus and method for controlling the super-heating degree in a heat pump system |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2350408A (en) * | 1941-05-28 | 1944-06-06 | Honeywell Regulator Co | Direct expansion air conditioning control system |
| US3385349A (en) * | 1966-03-01 | 1968-05-28 | Carrier Corp | Control arrangement for an air conditioning system |
| US4523435A (en) * | 1983-12-19 | 1985-06-18 | Carrier Corporation | Method and apparatus for controlling a refrigerant expansion valve in a refrigeration system |
| US4787211A (en) * | 1984-07-30 | 1988-11-29 | Copeland Corporation | Refrigeration system |
| USRE33775E (en) * | 1984-08-22 | 1991-12-24 | Emerson Electric Co. | Pulse controlled expansion valve for multiple evaporators and method of controlling same |
| US4835976A (en) * | 1988-03-14 | 1989-06-06 | Eaton Corporation | Controlling superheat in a refrigeration system |
| JP3373326B2 (en) * | 1995-04-17 | 2003-02-04 | サンデン株式会社 | Vehicle air conditioner |
| DE69732206T2 (en) * | 1996-08-22 | 2005-12-22 | Denso Corp., Kariya | Refrigeration system of the vapor compression type |
| US5996360A (en) * | 1997-11-27 | 1999-12-07 | Denso Corporation | Refrigerant cycle system |
| US6141981A (en) * | 1999-03-26 | 2000-11-07 | Carrier Corporation | Superheat control for optimum capacity under power limitation and using a suction modulation valve |
| US6321549B1 (en) * | 2000-04-14 | 2001-11-27 | Carrier Corporation | Electronic expansion valve control system |
| ITTO20030792A1 (en) * | 2002-10-08 | 2004-04-09 | Danfoss As | VALVE CONTROL DEVICE AND PROCEDURE |
| US7096679B2 (en) * | 2003-12-23 | 2006-08-29 | Tecumseh Products Company | Transcritical vapor compression system and method of operating including refrigerant storage tank and non-variable expansion device |
| US7290402B1 (en) * | 2003-12-29 | 2007-11-06 | Heatcraft Refrigeration Products Llc | Expansion valve control system and method and refrigeration unit employing the same |
| US7234313B2 (en) * | 2004-11-02 | 2007-06-26 | Stargate International, Inc. | HVAC monitor and superheat calculator system |
| JP3852015B1 (en) * | 2005-05-30 | 2006-11-29 | ダイキン工業株式会社 | Humidity control device |
| WO2011046803A2 (en) * | 2009-10-14 | 2011-04-21 | Carrier Corporation | Dehumidification control in refrigerant vapor compression systems |
-
2008
- 2008-01-11 WO PCT/US2008/050832 patent/WO2009088517A1/en active Application Filing
- 2008-01-11 CN CN2008801248736A patent/CN101910762A/en active Pending
- 2008-01-11 US US12/741,392 patent/US20100242508A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5664425A (en) * | 1991-03-08 | 1997-09-09 | Hyde; Robert E. | Process for dehumidifying air in an air-conditioned environment with climate control system |
| US6427454B1 (en) * | 2000-02-05 | 2002-08-06 | Michael K. West | Air conditioner and controller for active dehumidification while using ambient air to prevent overcooling |
| JP2002061922A (en) * | 2000-08-14 | 2002-02-28 | Fujitsu General Ltd | Method for contorlling air conditioner |
| CN1645017A (en) * | 2003-10-17 | 2005-07-27 | Lg电子株式会社 | Apparatus and method for controlling the super-heating degree in a heat pump system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009088517A1 (en) | 2009-07-16 |
| US20100242508A1 (en) | 2010-09-30 |
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