CN104976737A - Air conditioner and refrigeration method - Google Patents
Air conditioner and refrigeration method Download PDFInfo
- Publication number
- CN104976737A CN104976737A CN201510378002.9A CN201510378002A CN104976737A CN 104976737 A CN104976737 A CN 104976737A CN 201510378002 A CN201510378002 A CN 201510378002A CN 104976737 A CN104976737 A CN 104976737A
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- China
- Prior art keywords
- temperature
- outdoor
- heater
- primary heater
- controller
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of structural design of air conditioners and refrigeration methods, and provides an air conditioner and a refrigeration method. The air conditioner comprises a temperature monitoring device, a controller and a compressor, a first heater, an outdoor heat exchanger, a throttling element, a second heater and an indoor heat exchanger which are sequentially connected in a same loop in series; the controller is used for acquiring an outdoor temperature value through the temperature monitoring device in a refrigeration mode and comparing the outdoor temperature value with a temperature threshold value, and the first heater and the second heater are started or stopped when the outdoor temperature value is smaller or larger than the temperature threshold value. The temperature of refrigerants before throttling can be significantly increased through heating before throttling is performed, the phenomenon that the throttling effect is influenced by refrigeration oil precipitation due to the fact that the environment temperature at the throttling position is too low is prevented from occurring, and therefore the phenomena of indoor unit freezing, compressor liquid returning and the like can be avoided when the air conditioner runs for a long time; the freezing phenomenon due to the fact that the temperature of throttled low-temperature working gas is too low in a low-temperature environment can be prevented from occurring through heating after throttling.
Description
Technical field
The present invention relates to Structural design of the air conditioner and refrigerating method technical field, a kind of air-conditioner and refrigerating method are provided especially.
Background technology
In existing frequency conversion gas air conditioner control system, freeze when environment temperature is hotter in gas air conditioner major design basis, heats time environment temperature is lower.
And when outdoor environment temperature is lower, if now indoor still have refrigeration demand, now because outside heat transfer effect is very good, condensation heat radiation is very good, finally cause compressor exhaust temperature too low, pressure at expulsion is not enough, and cold-producing medium does not have enough power to enter indoor in side outdoor, and then causes the low-down phenomenon of air-conditioning system refrigerating capacity.If long-play, than being easier to cause, indoor set freezes, compressor returns the problem such as liquid, outdoor unit heat exchanger frosting.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention indoor set that is existing air-conditioner under cryogenic refrigeration regulates freezes and easily returns the technical problem of liquid and outdoor unit heat exchanger frosting with, contracting machine.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of air-conditioner, comprising device for detecting temperature, controller and being serially connected with the compressor of the same circuit, primary heater, outdoor heat exchanger, restricting element, secondary heater and indoor heat exchanger successively;
Described controller is used for obtaining outdoor temp angle value by described device for detecting temperature in cooling mode, and outdoor temp angle value and temperature threshold are compared, open described primary heater and secondary heater when outdoor temp angle value is less than described temperature threshold, and close described primary heater and secondary heater when outdoor temp angle value is greater than described temperature threshold.
Preferably, described primary heater is smoke combustion device, and described secondary heater is flue gas heat-exchange unit, and the air inlet of described secondary heater is communicated with the exhaust vent of described primary heater.
Present invention also offers and a kind ofly use above-mentioned air-conditioner to carry out the method for freezing, comprise the following steps:
S1, startup air-conditioner carry out refrigerating operaton;
S2, detect outdoor temperature by described temperature inductor;
S3, by described controller, the outdoor temperature detected by described temperature inductor to be judged, and open described primary heater when outdoor temperature is less than described temperature threshold, and with the reduction of outdoor temperature or rising and the raising of correspondence or reduce the heating intensity of described primary heater.
Preferably, outdoor temperature is divided into several subregions by gradient, and the corresponding gear control of described controller to described primary heater being divided into several respective amount.
Preferably, outdoor temperature is divided into four subregions by gradient, and accordingly the control of described controller to described primary heater is divided into closedown, low grade, middle-grade and high-grade four gears.
Preferably, described controller adopts stepless temperature-regulating to control to described primary heater.
Preferably, following relational expression is met between the heating-up temperature of the primary heater under described controller controls and outdoor temperature change:
T
1=T
2, wherein, T
1for the variable quantity of the heating-up temperature of primary heater, T
2for the variable quantity of outdoor temperature.
(3) beneficial effect
A kind of air-conditioner provided by the invention, comprises device for detecting temperature, controller and is serially connected with the compressor of the same circuit, primary heater, outdoor heat exchanger, restricting element, secondary heater and indoor heat exchanger successively; Controller is used for obtaining outdoor temp angle value by device for detecting temperature in cooling mode, and outdoor temp angle value and temperature threshold are compared, open primary heater and secondary heater when outdoor temp angle value is less than temperature threshold, and close primary heater and secondary heater when outdoor temp angle value is greater than temperature threshold.By primary heater, refrigerant is heated before throttling, the temperature of refrigerant before throttling can be significantly improved, prevent throttling place due to environment temperature too low and cause refrigeration oil separate out and affect restriction effect phenomenon occur, avoid when long-play, indoor set freezes, compressor returns the phenomenons such as liquid; By secondary heater, refrigerant medium is heated after throttling, avoid the cryogenic fluid gas temperature in low temperature environment after throttling too low and occur icing phenomenon.
Further, primary heater is smoke combustion device, and secondary heater is flue gas heat-exchange unit, and the air inlet of secondary heater is communicated with the exhaust vent of primary heater.Make the heat source of secondary heater derive from the used heat of primary heater thus, thus improve the utilization rate of the energy.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of air-conditioner of the embodiment of the present invention.
Reference numeral:
1, compressor; 2, cross valve; 3, primary heater; 4, outdoor heat exchanger; 5, restricting element; 6, indoor heat exchanger; 7, gas-liquid separator; 8, secondary heater.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
As shown in Figure 1, a kind of air-conditioner that the embodiment of the present invention provides, comprises cross valve 2, compressor 1, outdoor heat exchanger 4, restricting element 5, indoor heat exchanger 6, primary heater 3, temperature inductor and controller; Primary heater 3, outdoor heat exchanger 4, restricting element 5 and indoor heat exchanger 6 are serially connected with the first path successively, the two ends of the first path respectively with two orifice of cross valve 2; The two ends (inlet end and drain side) of compressor 1 corresponding with two other orifice of cross valve 2, the air inlet pipeline of compressor 1 is also provided with gas-liquid separator 7, and this gas-liquid separator 7 is for filtering out the liquid in air inlet pipeline in cold media gas; Cross valve 2 is for making the first path and compressor 1 in forward on-state and oppositely switching between on-state, even if air-conditioner switches between refrigeration mode and heating mode, be specially: when cross valve 2 makes the fluid pipeline of compressor 1 be communicated with indoor heat exchanger 6, and when making the air inlet pipeline of compressor 1 be communicated with primary heater 3, air-conditioner is heating mode; When cross valve 2 makes the fluid pipeline of compressor 1 be communicated with primary heater 3, and when the air inlet pipeline of compressor 1 is communicated with indoor heat exchanger 6, air-conditioner is in refrigeration mode.
Temperature inductor is disposed in the outdoor, for monitoring outdoor temperature, and outdoor temperature information is passed to controller; Controller is used for the outdoor temperature that sensed by temperature inductor and temperature threshold compares, and open primary heater 3 when outdoor temperature is less than temperature threshold, and close primary heater 3 when outdoor temperature is greater than temperature threshold, this temperature threshold is delimit the boundary whether outdoor temperature is low temperature, the setting of concrete numerical value affects by factors such as the composition of refrigerant medium and applying environment, determines when specifically using by experiment.Under cryogenic refrigeration environment (outdoor temperature is lower than temperature threshold), because outside heat transfer effect is very good, condensation heat radiation is very good, compressor 1 delivery temperature finally can be caused too low, pressure at expulsion is not enough, cold-producing medium does not have enough power to enter indoor in side outdoor, and then causes the low-down phenomenon of air-conditioning system refrigerating capacity, and the refrigeration working medium in outdoor unit heat exchanger is easy to frosting at low ambient temperatures or freezes.The present embodiment is heated by primary heater 3 pairs of refrigerants before throttling, the temperature of refrigerant before throttling can be significantly improved, prevent throttling place due to environment temperature too low and cause refrigeration oil separate out and affect restriction effect phenomenon occur, avoid when long-play, indoor set freeze, the phenomenon such as compressor 1 time liquid.
The air-conditioner of the present embodiment also comprises secondary heater 8, secondary heater 8 is arranged on the first path, and between restricting element 5 and indoor heat exchanger 6, secondary heater is used for being controlled to open by controller when outdoor temperature is less than temperature threshold, and controlled to close by controller when outdoor temperature is greater than temperature threshold, heated by the gas working medium after secondary heater 8 pairs of throttlings, avoid the cryogenic fluid gas temperature in low temperature environment after throttling too low and occur icing phenomenon.
Wherein, primary heater is preferably smoke combustion device, and secondary heater is preferably flue gas heat-exchange unit, and primary heater has air intlet, fuel gas inlet and exhaust vent; And flue gas heat-exchange unit has air inlet and exhaust outlet, discharged by exhaust outlet again after carrying out heat exchange by flue gas that air inlet passes into; The air inlet of the secondary heater 8 of the present embodiment is communicated with the exhaust vent of described primary heater 3, and the thermal source of such secondary heater derives from the fume waste heat of primary heater completely, thus improves the utilization rate of the energy.
Present invention also offers a kind of refrigerating method using above-mentioned air-conditioner, comprise the following steps:
S1, start described air-conditioner and carry out refrigerating operaton;
S2, described temperature inductor detect outdoor temperature;
S3, described controller judge the outdoor temperature detected by described temperature inductor, and open described primary heater 3 when outdoor temperature is less than described temperature threshold, and with the reduction of outdoor temperature or rising and the raising of correspondence or reduce the heating intensity of described primary heater 3.
In step 3, meet following relational expression between the heating-up temperature of primary heater 3 under control of the controller and outdoor temperature change: T
1=4T
2, wherein, T
1for the variable quantity of the heating-up temperature of primary heater 3, T
2for the variable quantity of outdoor temperature.Specifically outdoor temperature can be divided into several subregions by gradient, and the corresponding gear control of described controller to described primary heater 3 being divided into several respective amount, such as primary heater 3 can heat from 0 ~ 200 DEG C, the low temperature warm area of setting is 20 DEG C ~-30 DEG C, so carry out ratio according to the temperature difference and calculate 50 DEG C of temperature difference, need 200 DEG C to be divided into 50 parts, environment temperature often reduces by 1 degree, and primary heater 3 raises 4 DEG C.Should be noted that, here 50 parts can be divide equally may not be to divide equally, the combination that also can be divided into more parts or facilitate selection less for control, such as outdoor temperature can be divided into from high to low four subregions, each subregion corresponds to one of controller and controls gear, and namely the control gear of controller is divided into from low to high successively: close, low-grade, middle-grade and high-grade, and this kind of mode controls convenience, and the design difficulty of controller is low, operating cost is also lower.If pursue to regulate and control more accurately, controller can also be set to the mode adopting stepless temperature-regulating to control to described primary heater 3.
Thermal source due to secondary heater 8 derives from the used heat of primary heater 3, when primary heater 3 add heat increase with the reduction of outdoor temperature time, the EGT that primary heater 3 produces also can improve thereupon, thus the heating-up temperature of secondary heater 8 is also strengthened gradually with the reduction of outdoor temperature.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (7)
1. an air-conditioner, it is characterized in that, comprise device for detecting temperature, controller and be serially connected with the compressor (1) of the same circuit, primary heater (3), outdoor heat exchanger (4), restricting element (5), secondary heater (8) and indoor heat exchanger (6) successively;
Described controller is used for obtaining outdoor temp angle value by described device for detecting temperature in cooling mode, and outdoor temp angle value and temperature threshold are compared, open described primary heater (3) and secondary heater (8) when outdoor temp angle value is less than described temperature threshold, and close described primary heater (3) and secondary heater (8) when outdoor temp angle value is greater than described temperature threshold.
2. air-conditioner according to claim 1, it is characterized in that, described primary heater is smoke combustion device, described secondary heater (8) is flue gas heat-exchange unit, and the air inlet of described secondary heater (8) is communicated with the exhaust vent of described primary heater (3).
3. use the air-conditioner as described in any one of claim 1 or 2 to carry out a method of freezing, it is characterized in that, comprise the following steps:
S1, startup air-conditioner carry out refrigerating operaton;
S2, detect outdoor temperature by described temperature inductor;
S3, by described controller, the outdoor temperature detected by described temperature inductor to be judged, and open described primary heater (3) when outdoor temperature is less than described temperature threshold, and with the reduction of outdoor temperature or rising and the raising of correspondence or reduce the heating intensity of described primary heater (3).
4. refrigerating method according to claim 3, is characterized in that, outdoor temperature is divided into several subregions by gradient, and the corresponding gear control of described controller to described primary heater (3) being divided into several respective amount.
5. refrigerating method according to claim 3, it is characterized in that, outdoor temperature is divided into four subregions by gradient, and accordingly the control of described controller to described primary heater (3) is divided into closedown, low grade, middle-grade and high-grade four gears.
6. refrigerating method according to claim 5, is characterized in that, described controller adopts stepless temperature-regulating to control to described primary heater (3).
7. the refrigerating method according to any one of claim 3 to 6, is characterized in that, meets following relational expression between the heating-up temperature of the primary heater (3) under described controller controls and outdoor temperature change:
T
1=4T
2, wherein, T
1for the variable quantity of the heating-up temperature of primary heater (3), T
2for the variable quantity of outdoor temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378002.9A CN104976737B (en) | 2015-06-30 | 2015-06-30 | Air conditioner and refrigerating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378002.9A CN104976737B (en) | 2015-06-30 | 2015-06-30 | Air conditioner and refrigerating method |
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| Publication Number | Publication Date |
|---|---|
| CN104976737A true CN104976737A (en) | 2015-10-14 |
| CN104976737B CN104976737B (en) | 2018-02-23 |
Family
ID=54273499
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510378002.9A Active CN104976737B (en) | 2015-06-30 | 2015-06-30 | Air conditioner and refrigerating method |
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| Country | Link |
|---|---|
| CN (1) | CN104976737B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106484A (en) * | 2018-01-30 | 2018-06-01 | 中国科学院理化技术研究所 | A kind of device and method for preventing cryogenic heat exchanger frozen plug |
| CN109990394A (en) * | 2019-04-15 | 2019-07-09 | 珠海格力电器股份有限公司 | The control method and heating device and air conditioner of compressor oil temperature |
| CN114489176A (en) * | 2021-12-31 | 2022-05-13 | 北京京仪自动化装备技术股份有限公司 | Coupling temperature control system and method |
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| CN201050912Y (en) * | 2007-05-25 | 2008-04-23 | 王金凤 | Hot pump water heater or heat pump air conditioner with defrosting function |
| CN103363708A (en) * | 2012-04-09 | 2013-10-23 | 珠海格力电器股份有限公司 | Heat pump type air conditioning device |
| CN203375604U (en) * | 2013-06-28 | 2014-01-01 | 美的集团股份有限公司 | Heat pump air conditioner system |
| CN103851752A (en) * | 2012-12-04 | 2014-06-11 | 邯郸美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN104596000A (en) * | 2014-12-19 | 2015-05-06 | 广东美的制冷设备有限公司 | Air conditioner and control method of air conditioner |
-
2015
- 2015-06-30 CN CN201510378002.9A patent/CN104976737B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201050912Y (en) * | 2007-05-25 | 2008-04-23 | 王金凤 | Hot pump water heater or heat pump air conditioner with defrosting function |
| CN103363708A (en) * | 2012-04-09 | 2013-10-23 | 珠海格力电器股份有限公司 | Heat pump type air conditioning device |
| CN103851752A (en) * | 2012-12-04 | 2014-06-11 | 邯郸美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN203375604U (en) * | 2013-06-28 | 2014-01-01 | 美的集团股份有限公司 | Heat pump air conditioner system |
| CN104596000A (en) * | 2014-12-19 | 2015-05-06 | 广东美的制冷设备有限公司 | Air conditioner and control method of air conditioner |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106484A (en) * | 2018-01-30 | 2018-06-01 | 中国科学院理化技术研究所 | A kind of device and method for preventing cryogenic heat exchanger frozen plug |
| CN109990394A (en) * | 2019-04-15 | 2019-07-09 | 珠海格力电器股份有限公司 | The control method and heating device and air conditioner of compressor oil temperature |
| CN109990394B (en) * | 2019-04-15 | 2023-06-02 | 珠海格力电器股份有限公司 | Control method for engine oil temperature of compressor, heating device and air conditioner |
| CN114489176A (en) * | 2021-12-31 | 2022-05-13 | 北京京仪自动化装备技术股份有限公司 | Coupling temperature control system and method |
| CN114489176B (en) * | 2021-12-31 | 2023-04-07 | 北京京仪自动化装备技术股份有限公司 | Coupling temperature control system and method |
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| Publication number | Publication date |
|---|---|
| CN104976737B (en) | 2018-02-23 |
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