CN103884127A - Fixed-frequency air conditioner and control method of fixed-frequency air conditioner - Google Patents
Fixed-frequency air conditioner and control method of fixed-frequency air conditioner Download PDFInfo
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- CN103884127A CN103884127A CN201410098781.2A CN201410098781A CN103884127A CN 103884127 A CN103884127 A CN 103884127A CN 201410098781 A CN201410098781 A CN 201410098781A CN 103884127 A CN103884127 A CN 103884127A
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- conditioner
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Abstract
The invention discloses a fixed-frequency air conditioner which comprises an outdoor heat exchanger unit, an indoor heat exchanger unit, a four-way valve, a compressor unit and a throttling unit. The throttling unit comprises a first throttling element, a second throttling element and an electromagnetic valve, the first throttling element is connected between the outdoor heat exchanger unit and the indoor heat exchanger unit, the second throttling element and the electromagnetic valve are connected in series to be connected between the outdoor heat exchanger unit and the indoor heat exchanger unit, and the electromagnetic valve is switched on or off to control whether the second throttling element participates in throttling or not. According to the fixed-frequency air conditioner, due to the fact that the electromagnetic valve is switched on or off to control whether the second throttling element carries out throttling on refrigerants or not, the electromagnetic valve is switched on to control the second throttling element to carry out throttling on the refrigerants when defrosting occurs or the power supply voltage is low, in this way, the defrosting time is shortened when defrosting occurs, or condensation loads are released when the power supply voltage is low, and therefore the comfort of the fixed-frequency air conditioner is improved.
Description
Technical field
The invention belongs to air-conditioning technical field, relate in particular to a kind of air-conditioner with fixed frequency and control method thereof.
Background technology
At present air-conditioner with fixed frequency has market widely compared with low because of price, but there is also the defrost time long or in the time of peak times of power consumption in summer because lower voltage occurs to start or the situation of frequent chaser, therefore the comfortableness of existing air-conditioner with fixed frequency is poor.
Summary of the invention
The object of the present invention is to provide a kind of air-conditioner with fixed frequency and control method thereof, be intended to improve the comfortableness of air-conditioner with fixed frequency.
In order to realize object of the present invention, the invention provides a kind of air-conditioner with fixed frequency, comprise outdoor heat exchanger unit, indoor heat exchanger unit, cross valve, compressor unit and throttling unit, it is characterized in that, described throttling unit comprises first throttle element, second section fluid element and magnetic valve, and described first throttle element is connected between outdoor heat exchanger unit and indoor heat exchanger unit; After described second section fluid element and magnetic valve are connected in series, be connected between outdoor heat exchanger unit and indoor heat exchanger unit, described magnetic valve is controlled second section fluid element by opening and closing and whether is participated in throttling.
Preferably, described first throttle element is throttling valve core, and described second section fluid element is capillary.
Preferably, described magnetic valve is opened and is made second section fluid element participate in throttling in the time of defrost, and described magnetic valve cuts out and stops second section fluid element to participate in throttling in the time that defrost finishes.
Preferably, described magnetic valve is opened during lower than setting value at the supply voltage of air-conditioner with fixed frequency and is made second section fluid element participate in throttling, and described magnetic valve cuts out and stops second section fluid element to participate in throttling in the time that the supply voltage of air-conditioner with fixed frequency is not less than setting value.
Correspondingly, the invention provides a kind of control method of air-conditioner with fixed frequency, comprising:
S10, air-conditioner with fixed frequency, in the time switching to defrost pattern, makes magnetic valve keep closing the also temperature of sensing chamber's external heat exchanger unit.
S11, contrasts the temperature of the outdoor heat exchanger unit detecting with opening design temperature,, control magnetic valve and open when opening design temperature in the temperature of the outdoor heat exchanger unit detecting;
S12, by the temperature of the outdoor heat exchanger unit detecting with close design temperature and contrast, be greater than while closing design temperature in the temperature of the outdoor heat exchanger unit detecting, control closed electromagnetic valve and finish defrost and switch to heating mode.
Correspondingly, the present invention also provides a kind of control method of air-conditioner with fixed frequency, it is characterized in that, comprising:
S20, after air-conditioner with fixed frequency starts, controls magnetic valve and opens and detect its operating current;
S21, contrasts the operating current of the air-conditioner with fixed frequency detecting with setting electric current, when setting electric current, control closed electromagnetic valve at the operating current of the air-conditioner with fixed frequency detecting.
Preferably, in S20, be in particular, air-conditioner with fixed frequency detects its operating current after the startup scheduled time again.
Because air-conditioner with fixed frequency of the present invention and control method are by the unlatching of magnetic valve or close to control second section fluid element and whether refrigerant is carried out to throttling, thereby control second section fluid element refrigerant is carried out to throttling by beating opens solenoid valve when low in defrost or at the supply voltage of air-conditioner with fixed frequency, this has shortened the defrost time or has alleviated condensation load and ensured normally moving of air-conditioner with fixed frequency when low at supply voltage in the time of defrost, has therefore improved the comfortableness of air-conditioner with fixed frequency.
Brief description of the drawings
Fig. 1 is the structural representation of air-conditioner with fixed frequency one preferred embodiment of the present invention;
Fig. 2 is the flow chart of the control method of air-conditioner with fixed frequency of the present invention in the time of defrost;
Fig. 3 is the flow chart of the control method of air-conditioner with fixed frequency of the present invention in the time that supply voltage is low.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can be implemented so that those skilled in the art can better understand the present invention also, but illustrated embodiment is not as a limitation of the invention.
Refer to Fig. 1, it has disclosed a preferred embodiment of air-conditioner with fixed frequency of the present invention, and in the present embodiment, air-conditioner with fixed frequency comprises outdoor heat exchanger unit 100, indoor heat exchanger unit 200, cross valve 300, compressor unit 400 and throttling unit 500.
Described cross valve 300 is connected with outdoor heat exchanger unit 100, indoor heat exchanger unit 200 and compressor unit 400 respectively, thereby form the mobile loop of refrigerant, with by the mobile air-conditioner with fixed frequency cooling and warming of realizing of refrigerant, because the cooling and warming process of air-conditioner with fixed frequency is by those skilled in the art is known, in this explanation no longer in detail.
Described throttling unit 500 is connected with outdoor heat exchanger unit 100 and indoor heat exchanger unit 200 respectively, and it has first throttle element 510, second section fluid element 520 and magnetic valve 530.In the present embodiment, first throttle element 510 is throttling valve core, and it is connected between outdoor heat exchanger unit 100 and indoor heat exchanger unit 200.In the present embodiment, second section fluid element 520 is capillary, its two ends are connected electromagnetic valve 530 and indoor heat exchanger unit 200 respectively, and magnetic valve 530 is also connected with outdoor heat exchanger unit 100, the unlatching by magnetic valve 530 or close to control second section fluid element 520 and whether refrigerant is carried out to throttling.Thereby at air-conditioner with fixed frequency of the present invention during in defrost, control second section fluid element 520 by opens solenoid valve 530 and participate in refrigerant to carry out throttling, thus increased refrigerant circulation flow, accelerated outdoor heat exchanger unit 100 defrost speed, shortened the defrost time; Heating capacity in a cycle period is improved, and the mean temperature of air-conditioner air outlet also raises, and user's comfort level has obtained larger lifting.In the time of peak times of power consumption in summer when the supply voltage of air-conditioner with fixed frequency is during lower than setting value, controlling second section fluid element 520 by opens solenoid valve 530 participates in refrigerant to carry out throttling, thereby share a part of thermic load by second section fluid element 520, this alleviated air-conditioner with fixed frequency of the present invention condensation load, reduced its delivery temperature and electric current, thereby ensured normal startup and the reliability service of air-conditioner with fixed frequency of the present invention.
Because whether air-conditioner with fixed frequency of the present invention is by the unlatching of magnetic valve 530 or close to control second section fluid element 520 and participate in refrigerant to carry out throttling, thereby in defrost or control second section fluid element 520 by opens solenoid valve 530 at the supply voltage of air-conditioner with fixed frequency when low and participate in refrigerant to carry out throttling, this has shortened the defrost time or has alleviated condensation load at supply voltage when low and ensured the normal operation of air-conditioner with fixed frequency of the present invention in the time of defrost, has therefore improved the comfortableness of air-conditioner with fixed frequency of the present invention.
Refer to Fig. 2, the control method of air-conditioner with fixed frequency of the present invention in the time of defrost, comprising:
S10, air-conditioner with fixed frequency, in the time switching to defrost pattern, makes magnetic valve 530 keep closing the also temperature of sensing chamber's external heat exchanger unit 100.
S11, contrasts the temperature of the outdoor heat exchanger unit 100 detecting with opening design temperature,, control magnetic valve 530 and open when opening design temperature in the temperature of the outdoor heat exchanger unit 100 detecting;
Particularly, in the present embodiment, opening design temperature is-5 DEG C, and when the temperature of the outdoor heat exchanger unit 100 detecting is during lower than-5 DEG C, air-conditioner with fixed frequency control magnetic valve 530 is opened.
S12, by the temperature of the outdoor heat exchanger unit 100 detecting with close design temperature and contrast, be greater than while closing design temperature in the temperature of the outdoor heat exchanger unit 100 detecting, control magnetic valve 530 and close and finish defrost pattern and switch to heating mode;
Particularly, in the present embodiment, closing design temperature is 15 DEG C, and in the time that the temperature of the outdoor heat exchanger unit 100 detecting is greater than 15 DEG C, air-conditioner with fixed frequency control magnetic valve 530 cuts out.
Because air-conditioner with fixed frequency of the present invention is in the time switching to defrost pattern, because magnetic valve 530 cuts out, second section fluid element 520 does not participate in throttling, compressor unit 400 sucks the refrigerant from outdoor heat exchanger unit 100 be compressed into rapidly the refrigerant of HTHP, then the refrigerant of HTHP is pressed into and in indoor heat exchanger unit 200, carries out condensing cooling, thereby become in high pressure the refrigerant of temperature, in high pressure the refrigerant of temperature through first throttle element 510 laggard enter outdoor heat exchanger unit 100 and complete and heat circulation.When the temperature of the outdoor heat exchanger unit 100 detecting is when opening design temperature, because magnetic valve 530 is opened, now second section fluid element 520 makes the refrigerant circulation flow of air-conditioner with fixed frequency increase with the common throttling of first throttle element 510, thereby making air-conditioner with fixed frequency heat heating capacity in cycle period at one is improved, thereby accelerate the speed of outdoor heat exchanger unit 100 defrosts, shortened the time of outdoor heat exchanger unit 100 defrosts, and then air-conditioner with fixed frequency of the present invention improves user's comfortableness in the time of defrost pattern.
Refer to Fig. 3, the control method of air-conditioner with fixed frequency of the present invention in the time that supply voltage is low, comprising:
S20, after air-conditioner with fixed frequency starts, controls magnetic valve 530 and opens and detect its operating current;
Particularly, air-conditioner with fixed frequency detects its operating current after the startup scheduled time again, and for example air-conditioner with fixed frequency detects its operating current after startup 5min again.
S21, contrasts the operating current of the air-conditioner with fixed frequency detecting with setting electric current,, control magnetic valve 530 and close when setting electric current at the operating current of the air-conditioner with fixed frequency detecting.
Because air-conditioner with fixed frequency of the present invention is in the time starting, controlling magnetic valve 530 opens, therefore second section fluid element 520 and the common participation throttling of first throttle element 510, this is conducive to reduce the starting current of compressor unit 400, therefore in the time that supply voltage is lower, when in peak times of power consumption, supply voltage is lower than 180V, participate in that by second section fluid element 520 refrigerant is carried out to throttling and share a part of thermic load, this has alleviated the load of compressor unit 400, thereby ensure that air-conditioner with fixed frequency still can normally move, and then the cooling or heating effect that the frequent unlatching that effectively reduces air-conditioner with fixed frequency causes is poor, so air-conditioner with fixed frequency of the present invention has improved user's comfortableness in the time that supply voltage is low.In the time of voltage recovery, the running current of compressor unit 400 reduces, and by controlling closing of magnetic valve 520, thereby makes second section fluid element 530 not participate in throttling, and therefore air-conditioner with fixed frequency of the present invention is in normal Start-up and operating performance.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. an air-conditioner with fixed frequency, comprise outdoor heat exchanger unit, indoor heat exchanger unit, cross valve, compressor unit and throttling unit, it is characterized in that, described throttling unit comprises first throttle element, second section fluid element and magnetic valve, and described first throttle element is connected between outdoor heat exchanger unit and indoor heat exchanger unit; After described second section fluid element and magnetic valve are connected in series, be connected between outdoor heat exchanger unit and indoor heat exchanger unit, described magnetic valve is controlled second section fluid element by opening and closing and whether is participated in throttling.
2. an air-conditioner with fixed frequency as claimed in claim 1, is characterized in that, described first throttle element is throttling valve core, and described second section fluid element is capillary.
3. an air-conditioner with fixed frequency as claimed in claim 1, is characterized in that, described magnetic valve is opened and made second section fluid element participate in throttling in the time of defrost, and described magnetic valve cuts out and stops second section fluid element to participate in throttling in the time that defrost finishes.
4. an air-conditioner with fixed frequency as claimed in claim 1, it is characterized in that, described magnetic valve is opened during lower than setting value at the supply voltage of air-conditioner with fixed frequency and is made second section fluid element participate in throttling, and described magnetic valve cuts out and stops second section fluid element to participate in throttling in the time that the supply voltage of air-conditioner with fixed frequency is not less than setting value.
5. a control method for air-conditioner with fixed frequency as claimed in claim 1, is characterized in that, comprising:
S10, air-conditioner with fixed frequency, in the time switching to defrost pattern, makes magnetic valve keep closing the also temperature of sensing chamber's external heat exchanger unit.
S11, contrasts the temperature of the outdoor heat exchanger unit detecting with opening design temperature,, control magnetic valve and open when opening design temperature in the temperature of the outdoor heat exchanger unit detecting;
S12, by the temperature of the outdoor heat exchanger unit detecting with close design temperature and contrast, be greater than while closing design temperature in the temperature of the outdoor heat exchanger unit detecting, control closed electromagnetic valve and finish defrost and switch to heating mode.
6. a control method for air-conditioner with fixed frequency as claimed in claim 1, is characterized in that, comprising:
S20, after air-conditioner with fixed frequency starts, controls magnetic valve and opens and detect its operating current;
S21, contrasts the operating current of the air-conditioner with fixed frequency detecting with setting electric current, when setting electric current, control closed electromagnetic valve at the operating current of the air-conditioner with fixed frequency detecting.
7. a control method for air-conditioner with fixed frequency as claimed in claim 6, is characterized in that, in S20, is in particular, and air-conditioner with fixed frequency detects its operating current after the startup scheduled time again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410098781.2A CN103884127B (en) | 2014-03-14 | 2014-03-14 | Air-conditioner with fixed frequency and control method thereof |
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| CN201410098781.2A CN103884127B (en) | 2014-03-14 | 2014-03-14 | Air-conditioner with fixed frequency and control method thereof |
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| CN103884127B CN103884127B (en) | 2016-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706929A (en) * | 2020-06-02 | 2020-09-25 | 青岛海尔空调器有限总公司 | Control method and device for dehumidifier and dehumidifier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53122163A (en) * | 1977-03-31 | 1978-10-25 | Hitachi Ltd | Heat pump system air conditioner |
| CN2750259Y (en) * | 2004-12-03 | 2006-01-04 | 广东美的电器股份有限公司 | Low-temperature heat-production air conditioner |
| CN203744595U (en) * | 2014-03-14 | 2014-07-30 | 美的集团股份有限公司 | Fixed-frequency air conditioner |
-
2014
- 2014-03-14 CN CN201410098781.2A patent/CN103884127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53122163A (en) * | 1977-03-31 | 1978-10-25 | Hitachi Ltd | Heat pump system air conditioner |
| CN2750259Y (en) * | 2004-12-03 | 2006-01-04 | 广东美的电器股份有限公司 | Low-temperature heat-production air conditioner |
| CN203744595U (en) * | 2014-03-14 | 2014-07-30 | 美的集团股份有限公司 | Fixed-frequency air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706929A (en) * | 2020-06-02 | 2020-09-25 | 青岛海尔空调器有限总公司 | Control method and device for dehumidifier and dehumidifier |
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| CN103884127B (en) | 2016-08-17 |
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