CN105157127A - Cooling system and method for electric control unit of air conditioner - Google Patents
Cooling system and method for electric control unit of air conditioner Download PDFInfo
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- CN105157127A CN105157127A CN201510377982.0A CN201510377982A CN105157127A CN 105157127 A CN105157127 A CN 105157127A CN 201510377982 A CN201510377982 A CN 201510377982A CN 105157127 A CN105157127 A CN 105157127A
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- air
- ecu
- temperature
- conditioner
- cold
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of cooling of electric control units of air conditioners and provides a cooling system and method for an electric control unit of an air conditioner. The cooling system and method are used for cooling the electric control unit of the air conditioner. The system comprises a compressor, an outdoor unit, a throttling element and an indoor unit which are sequentially connected to a first loop in series. The system further comprises a first passage. One end of the first passage is communicated with the first loop. The other end of the first passage is communicated with an inlet of the compressor. The first passage is used for making a small number of condensing agents flow out of the first loop. The electric control unit is cooled in a heat exchange mode. Due to the fact that the temperature of the condensing agents is far lower than the temperature of a chip of the electric control unit, the purpose of cooling can be realized by communicating the first passage with any joint in the first loop. In addition, only a small number of condensing agents are made to flow out of the first loop, so that normal operation of the air conditioner is influenced slightly.
Description
Technical field
The present invention relates to the cooling technology field that air-conditioner is automatically controlled, the cooling system providing a kind of air-conditioner automatically controlled especially and cooling means.
Background technology
Along with expanding economy, present people more and more pursue the comfortableness of life, more pay close attention to the energy-conservation comfortable of air-conditioner.It is rapid that transducer air conditioning has cooling and warming, and temperature-controlled precision is high, comfortable energy-conservation and obtain and promote widely and apply.
Convertible frequency air-conditioner is mainly by control circuit, and control the change of compressor operating frequency according to signal feedback, running frequency is higher, and electric current is larger.Add that the particularity that air-conditioning products is applied, the reliability of electronic devices and components are the problems that must consider.The automatically controlled heating problem of convertible frequency air-conditioner has also become the problem of objective reality in industry.
The general solution adopted is now: radiation fin on ECU, adopts the method for passive heat exchange to reduce the temperature of electronic devices and components.But effect is very limited, can not meet the long-term Effec-tive Function of convertible frequency air-conditioner.
Had the scheme adopting cold-producing medium to dispel the heat to automatically controlled chip in recent years in industry, but do not use controlled scheme, but have employed integration system stream inflow chip loop, heat transfer effect is poor so on the one hand, affects complete machine refrigerating capacity on the other hand.
Summary of the invention
(1) technical problem that will solve
The object of this invention is to provide a kind of can for a long time, efficient and the automatically controlled cooling system of the air-conditioner of complete machine refrigerating capacity and control method thereof can not be affected.
(2) technical scheme
For achieving the above object, the invention provides the cooling system that a kind of air-conditioner is automatically controlled, for cooling the ECU of air-conditioner, comprise the compressor, off-premises station, restricting element and the indoor set that are serially connected with the first loop successively, also comprise the first path, one end of described first path and described first circuit communication, the other end is communicated with the entrance of described compressor, and described first path is used for cooling described ECU.
Preferably, the first switch, device for detecting temperature and controller is also comprised;
Described first switch-linear hybrid is on described first path;
The temperature information detected for monitoring the temperature of described ECU, and is transferred to described controller by described device for detecting temperature;
Described controller is used for opening described first switch when the temperature of described ECU is greater than the first temperature threshold, and in the temperature of described ECU lower than closing described first switch during the second temperature threshold.
Preferably, the tie point in described first path and described first loop is between described off-premises station and described indoor set.
Preferably, alternate path and second switch is also comprised;
One end of described alternate path and described first circuit communication, the other end is connected with the entrance of described compressor, and the tie point in described first path and alternate path and described first loop lays respectively at the both sides of described restricting element, described alternate path is used for cooling described ECU;
Described second switch is arranged on described alternate path, and is connected with described controller.
Preferably, the tie point in described alternate path and described first loop is between described indoor set and off-premises station.
Present invention also offers the cooling means that a kind of air-conditioner is automatically controlled, comprise the following steps:
The start of S1, air-conditioner runs;
S2, judge that air-conditioner is refrigeration mode or heating mode, when air-conditioner is refrigeration mode, part restricting element being flowed to the cold-producing medium of indoor set distributes, and is cooled ECU by the cold-producing medium distributed; When air-conditioner is heating mode, part restricting element being flowed to the cold-producing medium of off-premises station distributes, and is cooled ECU by the cold-producing medium distributed.
Preferably, between step S1 and step S2, also comprise step S11, step S11 is specially:
Judge that whether the temperature of ECU is higher than the first temperature threshold, when the temperature of ECU is higher than the first temperature threshold, perform step S2; When the temperature of ECU is lower than the second temperature threshold, repeat step S11.
Preferably, in step s 2, when to shunting time of cold-producing medium more than t1 duration time, stop the shunting to cold-producing medium; After stopping reaching t2 duration to a point flow/time length for cold-producing medium, repeat step S2.
Preferably, in step s 2, if reach t1 duration to a point flow/time length for cold-producing medium, then upper once perform step S2 time t3 duration is extended to point flow/time length of cold-producing medium.
(3) beneficial effect
The cooling system that a kind of air-conditioner provided by the invention is automatically controlled and cooling means, for cooling the ECU of air-conditioner, this system comprises the compressor, off-premises station, restricting element and the indoor set that are serially connected with the first loop successively, also comprise the first path, one end of described first path and described first circuit communication, the other end is communicated with the entrance of described compressor, for shunting out from the first loop by a small amount of condensing agent, is cooled ECU by the mode of heat exchange.Because the temperature of cold-producing medium is far below the chip temperature of ECU, therefore the first path is communicated with the object that all can reach cooling with the arbitrary node in the first loop; In addition, because the first loop is only shunt out by a small amount of condensing agent, therefore very little to the normal influence on system operation of air-conditioner.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the automatically controlled cooling system of a kind of air-conditioner of the embodiment of the present invention one.
Fig. 2 is the schematic diagram of the automatically controlled cooling system of a kind of air-conditioner of the embodiment of the present invention two.
Reference numeral:
1, compressor; 2, cross valve; 3, off-premises station; 4, restricting element; 5, indoor set; 6, gas-liquid separator; 7, the first path; 71, the first switch; 8, ECU; 9, alternate path; 91, second switch.
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, the cooling system that a kind of air-conditioner provided by the invention is automatically controlled, for cooling the ECU 8 of air-conditioner.This system comprises the compressor 1, off-premises station 3, restricting element 4 and the indoor set 5 that are serially connected with the first loop successively, when the outlet of compressor 1 be communicated with off-premises station 3, the outlet of compressor 1 be communicated with indoor set 5 time, air-conditioner is in refrigeration mode, otherwise is then in heating mode.Specifically the entrance and exit of compressor 1 can be communicated with two ports of cross valve 2 respectively, and the two ends of path off-premises station 3, restricting element 4 formed successively with indoor set 5 are communicated with two other port of cross valve 2 respectively, utilize cross valve 2 to switch connected state between the entrance and exit of compressor and indoor set and off-premises station, thus air-conditioner is switched between refrigeration mode and heating mode.
The cooling system that the air-conditioner of the present embodiment is automatically controlled also comprises the first path 7, one end of this first path 7 can be communicated with the arbitrary node in the first loop, the other end is communicated with the entrance of compressor 1, for a small amount of condensing agent is shunted out from the first loop, by the mode of heat exchange, ECU 8 is cooled.Wherein, although cold-producing medium temperature when the first loop Inner eycle can change, even if but when cold-producing medium reaches maximum temperature, this temperature value is also the chip temperature far below ECU 8, and therefore the first path 7 is communicated with the object that all can reach cooling with the arbitrary node in the first loop.In addition, because the first loop is only shunt out by a small amount of condensing agent, therefore very little to the normal influence on system operation of air-conditioner.
Wherein, the cold-producing medium in the first loop and the first path is before entering into compressor 1, and preferably first through gas-liquid separator 6, gas-liquid separator 6, for by the liquid filtering in cold-producing medium, is avoided damaging compressor 1.
Preferably, the tie point in the first path 7 and the first loop is between off-premises station and indoor set, in the first loop, no matter air-conditioner is in refrigeration mode or heating mode, cold-producing medium between indoor set 5 and off-premises station 3 is liquid state, compared to the cold-producing medium of gaseous state, liquid cold-producing medium has larger specific heat capacity, therefore, it is possible to better cool ECU 8.
Preferably, this system also comprises the first switch 71, device for detecting temperature and controller, and the first switch 71 is arranged on the first path 7; Device for detecting temperature is for monitoring the temperature of ECU 8, and the temperature information detected is transferred to controller, device for detecting temperature can be specifically the inside being arranged on ECU 8, for directly gathering the temperature of automatically controlled chip, also can be the air exit place being arranged on compressor, understood the temperature levels that air-conditioner complete machine runs by the delivery temperature of detection compressor, and then the temperature of automatically controlled chip can be extrapolated; First switch 71 can be magnetic valve, is electrically connected with controller; Controller is used for opening the first switch 71 when the temperature of ECU 8 is greater than the first temperature threshold, and in the temperature of ECU 8 lower than closing the first switch 71 during the second temperature threshold, namely cold-producing medium is distributed when needs cool ECU 8 by the first loop, and when not needing to cool ECU 8 not tapped refrigerant, the impact that air-conditioner is normally run can be reduced thus further.
Embodiment two
The cooling system that a kind of air-conditioner that the present embodiment two provides is automatically controlled, substantially identical with the structure of embodiment one, something in common is not repeating, and difference is:
As shown in Figure 2, alternate path 9 and second switch 91 is also comprised; One end of alternate path 9 and the first circuit communication, the other end is connected with the entrance of compressor 1, alternate path 9 is same for shunting the cold-producing medium in the first loop, and cool ECU 8, and the tie point in the first path 7 and alternate path 9 and the first loop lays respectively at the both sides of restricting element 4; Second switch 91 is arranged on alternate path 9, and is connected with controller.
The present embodiment additionally provides the automatically controlled cooling means of a kind of air-conditioner, and on the basis of said structure, the method is specifically realized by following steps:
The start of S1, air-conditioner runs;
S2, judge that air-conditioner is refrigeration mode or heating mode, when air-conditioner is refrigeration mode, open second switch 91 and close the first switch 71, part restricting element being flowed to the cold-producing medium of indoor set distributes, and is cooled ECU 8 by the cold-producing medium distributed; When air-conditioner is heating mode, open the first switch 71 and close second switch 91, part restricting element being flowed to the cold-producing medium of off-premises station distributes, and is cooled ECU 8 by the cold-producing medium distributed.Thus, no matter be refrigeration mode or heating mode, the cold-producing medium distributed all is through the cold-producing medium after throttling, because the refrigerant temperature after throttling is lower, is therefore more conducive to the cooling to ECU 8.
Preferably, between step S1 and step S2, also comprise step S11, step S11 is specially:
Judge that whether the temperature of ECU 8 is higher than the first temperature threshold, when the temperature of ECU 8 is higher than the first temperature threshold, perform step S2; When the temperature of ECU 8 is lower than the second temperature threshold, repeat step S11, namely only have the temperature when ECU 8 to rise to need during cooling and just the cold-producing medium in the first loop is shunted, not shunting without the need to during cooling requirement.In addition, the first temperature threshold and the second temperature threshold can be same temperature values, but are preferably the first temperature threshold and are greater than the second temperature threshold, can keep away when being in critical-temperature like this, the phenomenon that the first switch 71 or second switch 91 frequently open and close.
In step s 2, when to shunting time of cold-producing medium more than t1 duration time, stop the shunting to cold-producing medium; After stopping reaching t2 duration to a point flow/time length for cold-producing medium, repeat step S2, after cool time reached the t1 time to ECU 8, still ECU 8 is not down to below the second temperature threshold, now for not affecting the normal refrigerating operaton of air-conditioner, answer temporary close first switch 71.
In step s 2, if reach t1 duration to a point flow/time length for cold-producing medium, then upper once perform step S2 time t3 duration (t3 is the time span set according to actual condition) is extended to point flow/time length of cold-producing medium.Make the first switch 71 carry out start-stop according to certain sequential thus, prolongation gradually, to the cooling effect of ECU 8, does not affect the normal operation of air-conditioner while reaching cooling-down effect gradually.Wherein, t1, t2 and t3 are the time span of a setting respectively, and the length of concrete duration can set flexibly according to actual condition.
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 (9)
1. the cooling system that an air-conditioner is automatically controlled, cool for the ECU (8) to air-conditioner, comprise the compressor (1), off-premises station (3), restricting element (4) and the indoor set (5) that are serially connected with the first loop successively, it is characterized in that, also comprise the first path (7), one end of described first path (7) and described first circuit communication, the other end is communicated with the entrance of described compressor (1), and described first path (7) is for cooling described ECU (8).
2. the cooling system that air-conditioner according to claim 1 is automatically controlled, is characterized in that, also comprises the first switch (71), device for detecting temperature and controller;
Described first switch (71) is arranged on described first path (7);
The temperature information detected for monitoring the temperature of described ECU (8), and is transferred to described controller by described device for detecting temperature;
Described controller is used for opening described first switch (71) when the temperature of described ECU (8) is greater than the first temperature threshold, and in the temperature of described ECU (8) lower than closing described first switch (71) during the second temperature threshold.
3. the cooling system that air-conditioner according to claim 1 and 2 is automatically controlled, is characterized in that, the tie point in described first path (7) and described first loop is positioned between described off-premises station (3) and described indoor set (5).
4. the cooling system that air-conditioner according to claim 2 is automatically controlled, is characterized in that, also comprises alternate path (9) and second switch (91);
One end of described alternate path (9) and described first circuit communication, the other end is connected with the entrance of described compressor (1), and described first path (7) and alternate path (9) lay respectively at the both sides of described restricting element (4) with the tie point in described first loop, described alternate path (9) is for cooling described ECU (8);
Described second switch (91) is arranged on described alternate path (9), and is connected with described controller.
5. the cooling system that air-conditioner according to claim 4 is automatically controlled, is characterized in that, the tie point in described alternate path (9) and described first loop is positioned between described indoor set (5) and off-premises station (3).
6. the cooling means that air-conditioner is automatically controlled, is characterized in that, comprises the following steps:
The start of S1, air-conditioner runs;
S2, judge that air-conditioner is refrigeration mode or heating mode, when air-conditioner is refrigeration mode, part restricting element (4) being flowed to the cold-producing medium of indoor set (5) distributes, and is cooled ECU (8) by the cold-producing medium distributed; When air-conditioner is heating mode, part restricting element (4) being flowed to the cold-producing medium of off-premises station (3) distributes, and is cooled ECU (8) by the cold-producing medium distributed.
7. the cooling means that air-conditioner according to claim 6 is automatically controlled, is characterized in that, between step S1 and step S2, also comprise step S11, and step S11 is specially:
Judge that whether the temperature of ECU (8) is higher than the first temperature threshold, when the temperature of ECU (8) is higher than the first temperature threshold, perform step S2; When the temperature of ECU (8) is lower than the second temperature threshold, repeat step S11.
8. the cooling means that air-conditioner according to claim 7 is automatically controlled, is characterized in that, in step s 2, when to shunting time of cold-producing medium more than t1 duration time, stop the shunting to cold-producing medium; After stopping reaching t2 duration to a point flow/time length for cold-producing medium, repeat step S2.
9. the cooling means that air-conditioner according to claim 8 is automatically controlled, is characterized in that, in step s 2, if reach t1 duration to a point flow/time length for cold-producing medium, then upper once perform step S2 time t3 duration is extended to point flow/time length of cold-producing medium.
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| CN201510377982.0A CN105157127B (en) | 2015-06-30 | 2015-06-30 | The automatically controlled cooling system of air conditioner and cooling means |
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| CN201510377982.0A CN105157127B (en) | 2015-06-30 | 2015-06-30 | The automatically controlled cooling system of air conditioner and cooling means |
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| CN106352614A (en) * | 2016-11-03 | 2017-01-25 | 广东美的暖通设备有限公司 | Air conditioner and refrigerant cooling control method for same |
| CN107490090A (en) * | 2017-09-27 | 2017-12-19 | 广东美的暖通设备有限公司 | Air conditioner |
| WO2017215281A1 (en) * | 2016-06-12 | 2017-12-21 | 青岛海尔空调器有限总公司 | Cooling device for air conditioner circuit board |
| CN108548294A (en) * | 2018-03-30 | 2018-09-18 | 青岛海尔空调器有限总公司 | A kind of control method and device of air-conditioning system |
| CN109154447A (en) * | 2016-05-12 | 2019-01-04 | 三菱电机株式会社 | The outdoor unit of air-conditioning device |
| CN110822557A (en) * | 2019-11-14 | 2020-02-21 | 珠海格力电器股份有限公司 | Heat exchange system and air conditioner with same |
| CN111271778A (en) * | 2019-08-09 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Outdoor unit mainboard cooling system and method and air conditioner |
| CN111442417A (en) * | 2020-04-09 | 2020-07-24 | 广东美的制冷设备有限公司 | Air conditioner, control method and control device thereof, and computer readable storage medium |
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| CN111271778A (en) * | 2019-08-09 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Outdoor unit mainboard cooling system and method and air conditioner |
| CN111271778B (en) * | 2019-08-09 | 2021-06-04 | 宁波奥克斯电气股份有限公司 | Outdoor unit mainboard cooling system and method and air conditioner |
| CN110822557A (en) * | 2019-11-14 | 2020-02-21 | 珠海格力电器股份有限公司 | Heat exchange system and air conditioner with same |
| CN111442417A (en) * | 2020-04-09 | 2020-07-24 | 广东美的制冷设备有限公司 | Air conditioner, control method and control device thereof, and computer readable storage medium |
| CN111442417B (en) * | 2020-04-09 | 2022-04-19 | 广东美的制冷设备有限公司 | Air conditioner, control method and control device thereof, and computer readable storage medium |
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