CN101809380A - Pulse width modulation control for heat pump fan to eliminate cold blow - Google Patents
Pulse width modulation control for heat pump fan to eliminate cold blow Download PDFInfo
- Publication number
- CN101809380A CN101809380A CN200680056717A CN200680056717A CN101809380A CN 101809380 A CN101809380 A CN 101809380A CN 200680056717 A CN200680056717 A CN 200680056717A CN 200680056717 A CN200680056717 A CN 200680056717A CN 101809380 A CN101809380 A CN 101809380A
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- China
- Prior art keywords
- heat exchanger
- heat pump
- pulse width
- moving device
- air
- 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.)
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Classifications
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0293—Control issues related to the indoor fan, e.g. controlling speed
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0314—Temperature sensors near the indoor heat exchanger
Abstract
A heat pump refrigerant system is provided with a pulse width modulation control for a fan moving air over the indoor heat exchanger. When it is determined that there is insufficient heat rejected by the indoor heat exchanger to heat the volume of air being delivered by the fan into the conditioned environment, the volume of air supplied to the conditioned environment is reduced by utilizing one of pulse width modulation techniques to cycle the indoor fan motor to reduce the average volume of supplied air. Therefore, a precise control over the temperature of air delivered to the conditioned space is achieved, temperature of the delivered air is increased to the target value, and so-called 'cold blow' conditions are avoided.
Description
Technical field
The application relates to a kind of heat pump, wherein, the fan that is used for making air move to conditioned environment is carried out pulse width modulation control to solve the problem of " cold blowing ".
Background technology
Heat pump is well known in the art and is used at hot weather or provides cooling to conditioned environment in time period of thermic load in producing excessively, perhaps when weather cold to same indoor environment heat supply.And known have the heat pump of more oversimplifying to design, and they can only be worked under heating mode.Providing to indoor environment aspect the effective adjusting, heat pump has great potentiality, but their use but has obstacle.
A known problem about existing heat pump design is so-called " cold blowing ".When heat pump did not have enough heat removal capacities to heat fully just to be driven to the air of waiting to regulate in the environment, " cold blowing " can take place.
When this phenomenon takes place, ordered about to cross indoor heat exchanger and enter the air of waiting to regulate in the environment not being heated to the desired temperature of people that is in this environment, cause uncomfortable condition to this person, that yes is undesirable for this.
Be known that or be transported to the volume of waiting to regulate the air in the environment and solve " cold blowing " problem by using speed-changing driving device or reducing by the two-speed fan motor.The two-speed fan motor can not provide enough flexibilities to adjust air-flow to reach desired temperature.Speed-changing driving device can provide such flexibility, but it is very expensive, is the source of extra potential integrity problem and is associated with loss in efficiency.Therefore, also there is not the suitable scheme of cost efficient to be used for addressing this problem.
Be known that pulse width modulation control is used to be controlled at the amount that flows to the cold-producing medium of compressor in the refrigeration system such as air-conditioning system or heat pump.Yet pulse width modulation control also is not used to solve above mentioned " cold blowing " problem as yet.
Summary of the invention
In a disclosed embodiment of the present invention, air is moved cross the fan of indoor heat exchanger to be worked in the mode of pulse width modulation.The amount of crossing indoor heat exchanger and entering the air in the climate controlled environment that is moved has accurately been adjusted in the use of pulse width modulation control, make that under the heating work pattern heat of being discharged to indoor air stream by indoor heat exchanger is enough to air heat with controlled volume to desired temperature.Thereby if can be used for adding the thermal change of hot-air by indoor heat exchanger discharged few, the amount of so just being ordered about the air that enters this environment will correspondingly reduce, and make air be transported in the climate controlled environment with target temperature.
In the single speed fan is used, control fan and it is circulated between " opening " position and off-position by strictness, the present invention can accurately control the temperature of the air that is transported to the interior space.If the use two-speed fan, pulse width modulation control can make this fan circulate between than low velocity and fair speed so, to reach desired effect.In the later case, if needed, the circulation between than low velocity and zero velocity and between fair speed and the zero velocity also allows.
For the single speed fan, fan is in the duration of position at full speed, and perhaps for two-speed fan, fan is in the duration of fair speed position, determine by temperature requirement and comfort level rank, and cycle rate mainly by the reliability requirement of fan component and variations in temperature allow bring definite.The refrigeration system thermal inertia in addition, need not to carry out frequent circulation, because can compensate the unexpected variation of fan speed.And, between the opening and closing of pulse width modulating signal, will fan belt to halted state fully, because mechanical inertia can allow to have in the follow-up circulation startup of milder.
These features of the present invention and further feature can get the best understanding from hereinafter explanation and accompanying drawing, below are brief description of the drawings.
Description of drawings
Fig. 1 shows the schematic diagram that has comprised heat pump of the present invention.
Fig. 2 shows the cyclic sequence of single speed fan.
Fig. 3 shows the cyclic sequence of two-speed fan.
The specific embodiment
Fig. 1 shows refrigeration system 20, and it compressor that comprises 22 is transported to discharge pipe 23 with cold-producing medium, and arrives indoor heat exchanger 26 through cross valve 24 (use if heat pump only is specifically designed to heating, then do not need cross valve).In the downstream of indoor heat exchanger 26, cold-producing medium arrives outdoor heat exchanger 30 then through expansion gear 28.Outdoor heat exchanger 30 is provided with fan 32, is used to that air is moved and crosses the outer heating surface of outdoor heat exchanger 30.In the downstream of outdoor heat exchanger 30, cold-producing medium passes through cross valve 24 once more, and enters suction line 33, and it sends back to cold-producing medium in the compressor 22.Refrigeration system 20 shown in Fig. 1 is under the heating work pattern.Can be by switching cross valve 24 and cold-producing medium at first being transported to outdoor heat exchanger 30 from discharge pipe 23, through expansion gear 28, then cold-producing medium is sent back to suction line 33 from indoor heat exchanger 26, refrigeration system 20 is changed under the air conditioning cooling work pattern.Yet what the present invention relates to is the improvement of particularly suitable when refrigeration system is in the heating work pattern.The schematic diagram of heat pump 20 is basic schematic diagram among Fig. 1, and as known for one of ordinary skill in the art, it can be improved by adding some enhancing features and variety of option.All these designs all fall in the scope of the invention and can benefit from the present invention.
As shown in Figure 1, air moving device, for example fan 34, air moved cross indoor heat exchanger 26 and enter in the environment to be regulated 36.Under the heating work pattern, heat exchanger 26 is fulfiled condenser (or gas cooler, at striding critical applications) function.Sometimes (for example, when high heating load demand is arranged under the low ambient temperature or in conditioned space), the outer heating surface of crossing heat exchanger 26 that is driven by fan 34 that the heat removal capacity that heat exchanger 26 is provided is not enough to heat the fully nominal volume air in the indoor environment 36 of going forward side by side.Under these circumstances, indoor air stream does not reach desired temperature, causes the uncomfortable condition of what is called " cold blowing " for the people who is in the indoor environment 36.Controller 38 (it can be independent control or refrigerant system controller) is provided with from the feedback communication loop of temperature sensor 49 and indoor fan 34 is operated under the pulse-width-modulated mode.Therefore, the controller 38 detectable air that go out just be transported in the indoor environment 36 are lower than desired temperature.In this case, controller 38 can be used for providing pulse width modulation control to the motor of indoor fan 34, makes to be supplied to the average external volume of the air of conditioned environment 36 to reduce by indoor fan 34.When the average external volume of air subtracts enough for a short time, the heat of being discharged by indoor heat exchanger 26 is enough to this air heat that has reduced volume to the desired temperature of people that is in the conditioned environment 36.As is known, desired temperature can be set by thermostat 50.Alternately, thermostat 50 can be used as the feedback device of controller 30.
By using pulse width modulation control, the circulation apace between the position of " opening " and " pass " (or engaging fully and disengaging fully) of the single speed motor of indoor fan 34.Under the situation of two-speed fan, the motor of indoor fan can be in its fair speed and circulation apace between than the position of low velocity, also can be between than low velocity position and off-position and circulation apace between fair speed position and the off-position.Under any situation, the volume that is transported to the air in the environment 36 is accurately regulated, and the volume of air after feasible heat of being discharged by indoor heat exchanger 26 enough will be regulated is heated to desired temperature.As mentioned above, when using the multi-speed fan motor, pulse width modulation cycle can be carried out between any speed, comprises zero velocity.
Suggestion adopts pulse-width modulation method to come control room internal fan 34 under the heating work pattern, accurately to regulate the temperature that is transported to adjusted (the heating) air in the indoor environment 36.This control is directly, does not need additional member.Cycle frequency is required to determine by the reliability requirement and the variations in temperature tolerance of indoor fan assembly.The consideration of duration aspect required air themperature value and comfort level rank that will reach and efficient at each velocity location place limited.To not need and will avoid frequent circulation, because the refrigeration system thermal inertia makes the acute variation smoothing of running parameter and compensates unexpected steep peak valley.For the single speed fan, can between zero velocity and full speed degree, carry out circulation; For the double fan fan speed, can be between than low velocity position and fair speed position, and can between than low velocity position and off-position and carry out circulation between fair speed position and the off-position.Multi-speed fan provides higher flexibility ratio and accurately control.At last, when pulse width modulating signal was unlocked and close, the mechanical inertia of indoor fan can help indoor fan to rotate (though the speed to continue to reduce) continuously, to allow to have in the follow-up circulation startup of milder.
Fig. 2 is the example relationship figure that is supplied between the temperature and time of air of conditioned space, and this in this refrigeration system, can be operated to indoor fan motor single full speed degree at refrigeration system, promptly in " opening " or the position that engages fully; Also can be operated to zero velocity, promptly in " pass " or the position that breaks away from fully.As can be seen, during beginning, indoor heat exchanger can not provide the heat of q.s to the air of the nominal volume that is supplied to conditioned environment, and actual temperature is lower than desired temperature, causes " cold blowing " condition.Equally, as can be seen, when indoor fan was introduced pulse width modulation control, indoor fan motor began circulation between full speed degree (or " opening " position) and zero velocity (or off-position), had reduced the time average amount of the air that is supplied to conditioned environment.As a result, when the pulse width modulation cycle parameter is adjusted to correct value, the temperature of actual provision air raises, and near and reach desired temperature.
Similarly, Fig. 3 shows another embodiment, wherein, fan motor can be operated to two kinds of speed and can be controlled at the fair speed position and than circulating between the low velocity position by pulse width modulation, and between than low velocity position and off-position, between fair speed position and off-position, circulate.As an example, here, fan circulates between than low velocity position and fair speed position.Again, adopt this layout, the temperature of actual provision air has raise and is very fast near desired temperature.
Must be noted that, though to have used square waveform, other waveform also be feasible and belong to scope of the present invention for pulse width modulation control in the embodiment of Fig. 2 and Fig. 3.For example, trapezoidal, triangle, square or any other waveform of circle can be used as to substitute and use.
Though disclose the preferred embodiments of the present invention, those of ordinary skill in the art will recognize, can carry out certain modification within the scope of the invention.For this reason, should study following claim carefully to determine true scope of the present invention and content.
Claims (30)
1. heat pump comprises:
Compressor, be used for the indoor heat exchanger that compressed refrigerant also is transported to this cold-producing medium the downstream, described indoor heat exchanger is provided with air moving device, be used for that air is moved and cross described indoor heat exchanger and enter environment to be regulated, cold-producing medium is from the described indoor heat exchanger expansion gear of flowing through, pass through outdoor heat exchanger then, cold-producing medium turns back to the compressor from outdoor heat exchanger; And
Controller, control is used for the described air moving device of described indoor heat exchanger, described controller provides pulse width modulating signal, so that when determining to be not enough to the air heat of nominal volume to desired temperature, regulate the time average volume that moves the air of crossing described indoor heat exchanger by described air moving device by the heat that described indoor heat exchanger is discharged.
2. the heat pump of claim 1, wherein, when heat pump was worked under heating mode, cross valve optionally was transported to described indoor heat exchanger with cold-producing medium from described compressor, and when heat pump is worked under refrigerating mode, was transported to described outdoor heat exchanger.
3. the heat pump of claim 1, wherein, described air moving device is a fan.
4. the heat pump of claim 1, wherein, the motor that is used for described air moving device is the single speed motor, described pulse width modulation control circulates motor apace.
5. the heat pump of claim 4, wherein, described pulse width modulation control makes motor circulation apace between " opening " position and off-position.
6. the heat pump of claim 5, wherein, the duration that is used for described " opening " position consider by temperature requirement and efficient at least one determine.
7. the heat pump of claim 1, wherein, the motor that is used for described air moving device is a double-speed motor, and described pulse width modulation control makes this double-speed motor in fair speed with than low velocity, than circulation apace between low velocity and off-position and fair speed and off-position at least a.
8. the heat pump of claim 7, wherein, at least one in the duration at each velocity location place is considered by temperature requirement and efficient determined.
9. the heat pump of claim 1, wherein, the motor that is used for described air moving device is many speed motor, described pulse width modulation control makes these many speed motor comprise the circulation apace between interior a plurality of speed of motor off-position.
10. the heat pump of claim 9, wherein, at least one in the duration at each velocity location place is considered by temperature requirement and efficient determined.
11. the heat pump of claim 1, wherein, be provided with temperature sensor in the environment to be regulated, be used for the temperature that sensing just is being transported to the air of this environment, described sensed temperature is provided for described controller, make described controller to regulate the time average volume of the air in this environment of shift-in, so that institute's sensed temperature is matched to desired temperature by utilizing described pulse width modulating technology.
12. the heat pump of claim 1 wherein, has been worked at least a portion during the time when described heat pump in subcritical region, described indoor heat exchanger is a condenser.
13. the heat pump of claim 1 wherein, is being striden in the critical zone when described heat pump and to be worked at least a portion during the time, described indoor heat exchanger is a gas cooler.
14. the heat pump of claim 1, wherein, at least one during pulse width modulation cycle speed is considered by reliability requirement, the requirement of variations in temperature allowed band and the efficient of air moving device determined.
15. the heat pump of claim 1, wherein, pulse width modulation control makes described air moving device circulate in zero velocity or between near zero velocity and non-zero speed, and when air moving device still at the volley the time, circulation subsequently just starts.
16. a method of operating heat pump may further comprise the steps:
(1) compressed refrigerant also is transported to this cold-producing medium the indoor heat exchanger in downstream, described indoor heat exchanger is provided with air moving device, be used for that air is moved and cross described indoor heat exchanger and enter environment to be regulated, cold-producing medium is from the described indoor heat exchanger expansion gear of flowing through, pass through outdoor heat exchanger then, cold-producing medium turns back to the compressor from outdoor heat exchanger; And
(2) control is used for the described air moving device of described indoor heat exchanger, by pulse width modulating signal is provided, so that when determining to be not enough to the air heat of nominal volume to desired temperature, regulate the time average volume that moves the air of crossing described indoor heat exchanger by described air moving device by the heat that described indoor heat exchanger is discharged.
17. the method for claim 16, wherein, when heat pump was worked under heating mode, cross valve optionally was transported to described indoor heat exchanger with cold-producing medium from described compressor, and when heat pump is worked under refrigerating mode, was transported to described outdoor heat exchanger.
18. the method for claim 16, wherein, described air moving device is a fan.
19. the method for claim 16, wherein, the motor that is used for described air moving device is the single speed motor, and described pulse width modulation control circulates motor apace.
20. the method for claim 19, wherein, described pulse width modulation control makes motor circulation apace between " opening " position and off-position.
21. the method for claim 20, wherein, the duration that is used for described " opening " position consider by temperature requirement and efficient at least one determine.
22. the method for claim 16, wherein, the motor that is used for described air moving device is a double-speed motor, and described pulse width modulation control makes this double-speed motor in fair speed with than low velocity, than circulation apace between low velocity and off-position and fair speed and off-position at least a.
23. the method for claim 22, wherein, at least one in the duration at each velocity location place is considered by temperature requirement and efficient determined.
24. the method for claim 16, wherein, the motor that is used for described air moving device is many speed motor, and described pulse width modulation control makes these many speed motor comprise the circulation apace between interior a plurality of speed of motor off-position.
25. the method for claim 24, wherein, at least one in the duration at each velocity location place is considered by temperature requirement and efficient determined.
26. the method for claim 16, wherein, be provided with temperature sensor in the environment to be regulated, be used for the temperature that sensing just is being transported to the air of this environment, described sensed temperature is provided for described controller, make described controller to regulate the time average volume of the air in this environment of shift-in, so that institute's sensed temperature is matched to desired temperature by utilizing described pulse width modulating technology.
27. the method for claim 16 wherein, has been worked at least a portion during the time when described heat pump in subcritical region, described indoor heat exchanger is a condenser.
28. the method for claim 16 wherein, is being striden in the critical zone when described heat pump and to be worked at least a portion during the time, described indoor heat exchanger is a gas cooler.
29. the method for claim 16, wherein, at least one during pulse width modulation cycle speed is considered by reliability requirement, the requirement of variations in temperature allowed band and the efficient of air moving device determined.
30. the method for claim 16, wherein, pulse width modulation control makes described air moving device circulate in zero velocity or between near zero velocity and non-zero speed, and when air moving device still at the volley the time, circulation subsequently is startup just.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2006/048896 WO2008076119A1 (en) | 2006-12-21 | 2006-12-21 | Pulse width modulation control for heat pump fan to eliminate cold blow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101809380A true CN101809380A (en) | 2010-08-18 |
Family
ID=39536591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680056717A Pending CN101809380A (en) | 2006-12-21 | 2006-12-21 | Pulse width modulation control for heat pump fan to eliminate cold blow |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20100000239A1 (en) |
| EP (1) | EP2095040A1 (en) |
| CN (1) | CN101809380A (en) |
| WO (1) | WO2008076119A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241016A (en) * | 2015-10-26 | 2016-01-13 | 四川长虹电器股份有限公司 | Indoor draught fan control device and method for multi-connected air conditioner |
| CN106765940A (en) * | 2016-12-16 | 2017-05-31 | 宁波奥克斯空调有限公司 | The control method of solar heat protection air-out when a kind of air-conditioner freezes |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8033479B2 (en) | 2004-10-06 | 2011-10-11 | Lawrence Kates | Electronically-controlled register vent for zone heating and cooling |
| US8371822B2 (en) | 2008-08-05 | 2013-02-12 | Lennox Industries Inc. | Dual-powered airflow generator |
| US8510255B2 (en) | 2010-09-14 | 2013-08-13 | Nest Labs, Inc. | Occupancy pattern detection, estimation and prediction |
| US9104211B2 (en) | 2010-11-19 | 2015-08-11 | Google Inc. | Temperature controller with model-based time to target calculation and display |
| US9092039B2 (en) | 2010-11-19 | 2015-07-28 | Google Inc. | HVAC controller with user-friendly installation features with wire insertion detection |
| US9448567B2 (en) | 2010-11-19 | 2016-09-20 | Google Inc. | Power management in single circuit HVAC systems and in multiple circuit HVAC systems |
| US9046898B2 (en) | 2011-02-24 | 2015-06-02 | Google Inc. | Power-preserving communications architecture with long-polling persistent cloud channel for wireless network-connected thermostat |
| US9268344B2 (en) | 2010-11-19 | 2016-02-23 | Google Inc. | Installation of thermostat powered by rechargeable battery |
| US8944338B2 (en) | 2011-02-24 | 2015-02-03 | Google Inc. | Thermostat with self-configuring connections to facilitate do-it-yourself installation |
| JP2014534405A (en) | 2011-10-21 | 2014-12-18 | ネスト・ラブズ・インコーポレイテッド | User-friendly, networked learning thermostat and related systems and methods |
| US9091453B2 (en) | 2012-03-29 | 2015-07-28 | Google Inc. | Enclosure cooling using early compressor turn-off with extended fan operation |
| US9098096B2 (en) | 2012-04-05 | 2015-08-04 | Google Inc. | Continuous intelligent-control-system update using information requests directed to user devices |
| US8620841B1 (en) | 2012-08-31 | 2013-12-31 | Nest Labs, Inc. | Dynamic distributed-sensor thermostat network for forecasting external events |
| US8708242B2 (en) * | 2012-09-21 | 2014-04-29 | Nest Labs, Inc. | Thermostat system with software-repurposable wiring terminals adaptable for HVAC systems of different ranges of complexity |
| US9208676B2 (en) | 2013-03-14 | 2015-12-08 | Google Inc. | Devices, methods, and associated information processing for security in a smart-sensored home |
| US10663188B2 (en) * | 2018-01-03 | 2020-05-26 | Haier Us Appliance Solutions, Inc. | Method for operating a packaged terminal air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100248760B1 (en) * | 1997-06-27 | 2000-04-01 | 윤종용 | Heating control method for air conditioner |
| US6131402A (en) * | 1998-06-03 | 2000-10-17 | Carrier Corporation | Apparatus and method of operating a heat pump to improve heating supply air temperature |
| US6276148B1 (en) * | 2000-02-16 | 2001-08-21 | David N. Shaw | Boosted air source heat pump |
-
2006
- 2006-12-21 CN CN200680056717A patent/CN101809380A/en active Pending
- 2006-12-21 WO PCT/US2006/048896 patent/WO2008076119A1/en active Application Filing
- 2006-12-21 US US12/447,549 patent/US20100000239A1/en not_active Abandoned
- 2006-12-21 EP EP06847969A patent/EP2095040A1/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241016A (en) * | 2015-10-26 | 2016-01-13 | 四川长虹电器股份有限公司 | Indoor draught fan control device and method for multi-connected air conditioner |
| CN105241016B (en) * | 2015-10-26 | 2018-04-17 | 四川长虹电器股份有限公司 | Multi-connected air conditioner indoor fan control device and method |
| CN106765940A (en) * | 2016-12-16 | 2017-05-31 | 宁波奥克斯空调有限公司 | The control method of solar heat protection air-out when a kind of air-conditioner freezes |
| CN106765940B (en) * | 2016-12-16 | 2019-10-11 | 奥克斯空调股份有限公司 | The control method of solar heat protection outlet air when a kind of air conditioner freezes |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100000239A1 (en) | 2010-01-07 |
| WO2008076119A1 (en) | 2008-06-26 |
| EP2095040A1 (en) | 2009-09-02 |
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