WO2020019849A1 - Air conditioner and outdoor unit defrosting control method thereof - Google Patents
Air conditioner and outdoor unit defrosting control method thereof Download PDFInfo
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- WO2020019849A1 WO2020019849A1 PCT/CN2019/088231 CN2019088231W WO2020019849A1 WO 2020019849 A1 WO2020019849 A1 WO 2020019849A1 CN 2019088231 W CN2019088231 W CN 2019088231W WO 2020019849 A1 WO2020019849 A1 WO 2020019849A1
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- air conditioner
- outdoor unit
- suction pressure
- control method
- defrosting
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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
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- 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
- F24F11/41—Defrosting; Preventing freezing
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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
- 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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- 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
- F24F11/65—Electronic processing for selecting an operating mode
Definitions
- the invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and an outdoor unit defrost control method thereof.
- an air conditioner includes an indoor unit, an outdoor unit, and a circulation circuit for connecting the indoor unit and the outdoor unit.
- the heat exchange medium in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation circuit, so as to change the room temperature. Effect. Take the heating operation of the air conditioner as an example, the coil of the outdoor unit is always in a low temperature state; at this time, if the outdoor environment has high humidity, the coil of the outdoor unit is prone to frost.
- frost will seriously affect the heat exchange efficiency of the outdoor unit, which will continuously weaken the heat exchange effect of the air conditioner, and then affect the comfort of the indoor environment. Therefore, during heating operation of the air conditioner, the air conditioner needs to ensure that the coil of the outdoor unit does not generate frost.
- the first method is to suspend heating operation of the air conditioner, and perform a reverse circulation operation on the heat exchange medium in the circulation circuit to achieve defrosting;
- the second method is to add a defrosting hot gas bypass line to the air conditioner, so as to directly introduce the high-temperature heat exchange medium discharged from the compressor into the outdoor heat exchanger to realize defrosting.
- the first defrost control method has a good defrost effect, it will affect the normal heating operation of the air conditioner; while the second defrost control method does not affect the normal heating operation of the air conditioner, But its defrosting effect is not very good.
- Each of the existing air conditioners can only implement one of the defrosting control methods, so that the heating effect of the existing air conditioners is easily affected by the frosting phenomenon of the outdoor unit.
- the present invention provides a defrost control method for an outdoor unit of an air conditioner.
- the defrost control method includes: obtaining an air intake pressure of the air conditioner during a heating operation of the air conditioner. And the coil temperature of the outdoor unit; and according to the suction pressure of the air conditioner and the coil temperature of the outdoor unit, the air conditioner is selectively brought into a corresponding outdoor unit defrost mode.
- the air conditioner is selectively caused to enter a corresponding air conditioner according to the suction pressure of the air conditioner and the coil temperature of the outdoor unit.
- the step of "outdoor unit defrost mode" specifically includes: comparing the suction pressure with a preset suction pressure, and comparing the coil temperature with a first preset temperature and / or a second preset temperature; Selectively comparing the suction pressure with the preset suction pressure and the comparison result of the coil temperature with the first preset temperature and / or the second preset temperature
- the air conditioner enters a corresponding outdoor unit defrost mode; wherein the first preset temperature is lower than the second preset temperature.
- the defrost control method further includes: after the air conditioner enters the first defrost mode, The tube temperature is greater than or equal to a third preset temperature, so that the air conditioner exits the first defrost mode.
- the step of "entering the air conditioner into a first defrost mode" specifically includes: during a heating operation of the air conditioner, The heat exchange medium output from the compressor of the air conditioner is directly introduced into the air inlet of the heat exchanger of the outdoor unit.
- the defrost control method further includes: after the air conditioner enters the second defrost mode, if The tube temperature is greater than or equal to the fourth preset temperature, so that the air conditioner exits the second defrost mode.
- the step of "making the air conditioner enter a second defrost mode" specifically includes: causing a circulation circuit of the air conditioner to perform a heat exchange medium inversion Cycle operation.
- the present invention also provides an air conditioner.
- the air conditioner includes a control device capable of performing the outdoor unit defrost control method described in any one of the foregoing preferred technical solutions.
- the air conditioner further includes a defrost hot gas bypass line, and the defrost hot gas bypass line is used to introduce a heat exchange medium discharged from a compressor of the air conditioner into the air conditioner.
- the heat exchanger of the outdoor unit is described.
- the outdoor unit defrosting control method for an air conditioner of the present invention includes: when the air conditioner is in a heating operation, obtaining a suction of the air conditioner; Air pressure and the coil temperature of the outdoor unit in order to determine the degree of frosting of the outdoor unit; selectively enabling the air conditioner according to the air intake pressure of the air conditioner and the coil temperature of the outdoor unit Enter the corresponding defrost mode of the outdoor unit, so that the air conditioner can select the optimal defrost mode according to the degree of frosting of the outdoor unit, and the technical solution that the air conditioner can only perform a single defrost mode in the prior art
- the present invention makes the defrost mode of the air conditioner more intelligent and flexible, thereby effectively avoiding the problem that the existing air conditioner is likely to seriously affect the heating effect because the selected defrost mode does not match the frost condition.
- FIG. 1 is a schematic diagram of a system structure of an air conditioner according to the present invention.
- FIG. 3 is a flowchart of specific steps of the defrosting control method of the present invention.
- the present invention provides a defrost control method for an outdoor unit of an air conditioner.
- the defrost control method includes: when the air conditioner is in a heating operation, obtaining an air intake pressure of the air conditioner. And the coil temperature of the outdoor unit; and according to the suction pressure of the air conditioner and the coil temperature of the outdoor unit, the air conditioner is selectively brought into a corresponding outdoor unit defrost mode.
- FIG. 1 is a schematic structural diagram of an air conditioner according to the present invention.
- the air conditioner includes a main circulation circuit and a Frost and hot gas bypass pipeline; wherein the main circulation circuit is provided with a compressor 1, a four-way valve 2, an indoor heat exchanger 3, an outdoor heat exchanger 4, and an electronic expansion valve 5, which are connected to each other, and the defrosting
- the hot gas bypass line is used to introduce the heat exchange medium discharged from the compressor 1 into the outdoor heat exchanger 4, and a solenoid valve 6 is provided on the defrost hot gas bypass line to control the defrost hot gas bypass line
- the solenoid valve 6 can also be replaced by other components having a switching function.
- the air conditioner may be provided with a defrosting hot gas bypass line.
- the air conditioner further includes a control device capable of performing the defrosting control method of the present invention; of course, the control device may be an original controller of the air conditioner or a technician for A controller and the like that are separately provided to run the control method.
- a control device capable of performing the defrosting control method of the present invention
- the control device may be an original controller of the air conditioner or a technician for A controller and the like that are separately provided to run the control method.
- an intake pressure sensor is provided at the suction port of the compressor 1
- a temperature sensor is provided at the coil of the outdoor unit.
- the control device of the air conditioner can obtain the compressor 1 through the intake pressure sensor.
- the coil temperature of the outdoor unit through the temperature sensor.
- the present invention provides a defrost hot gas bypass. Piping, so that part of the high-temperature and high-pressure heat exchange medium discharged from the compressor 1 can be directly introduced into the outdoor heat exchanger 4 through the defrosting hot gas bypass pipeline, thereby increasing the temperature of the outdoor heat exchanger 4 and further effectively alleviating it Frost phenomenon.
- this defrosting method is defined as the first defrosting mode; this method of defrosting by using a defrosting hot gas bypass pipeline has a problem of poor defrosting ability, but However, it can ensure that the air conditioner continues to run in the heating mode; in other words, this defrost method has a small effect on the heat generation of the air conditioner.
- the outdoor heat exchanger 4 has a severe frost phenomenon, the defrost It is difficult to achieve a good defrosting effect with the frost method.
- connection positions of the two ends of the defrost hot gas bypass pipeline are not fixed, and a technician can set the connection positions of the defrost hot gas bypass pipeline according to the actual use situation, as long as the defrost
- the hot gas bypass pipeline can introduce the high-temperature and high-pressure heat exchange medium into the outdoor heat exchanger 4.
- the air conditioner can also perform a reverse circulation of the heat exchange medium in the main circulation circuit, so that the outdoor heat exchanger 4 serves as a condenser. To work to achieve the defrost effect.
- this defrosting method is defined as the second defrosting mode; this method of reversely circulating the heat exchange medium to achieve defrosting has a good defrosting effect, but
- the air conditioner needs to stop heating operation, so the operation of the second defrosting mode will inevitably seriously affect the heating capacity of the air conditioner.
- FIG. 2 is a flowchart of main steps of the defrosting control method of the present invention.
- the steps of the defrosting control method mainly include:
- step S1 the control device of the air conditioner can obtain the suction pressure of the air conditioner and the coil temperature of the outdoor unit through the suction pressure sensor and the temperature sensor, so that The control device can use the suction pressure and the coil temperature as basic parameters to determine the frost formation of the outdoor unit.
- step S2 the control device can selectively cause the air conditioner to enter a corresponding outdoor unit defrost mode according to the suction pressure and the coil temperature. That is, in the control method, the control device can determine the frosting degree of the outdoor unit by combining the suction pressure and the coil temperature, so that the air conditioner can determine the frosting degree of the outdoor unit.
- the control method of the present invention can make the defrost mode of the air conditioner more intelligent and flexible, thereby being effective Avoiding the problem that the existing air conditioner is likely to seriously affect the heating effect due to the insufficient matching of the defrosting method and the frosting situation, thereby ensuring the heating capacity of the air conditioner to the greatest extent.
- FIG. 3 is a flowchart of specific steps of the defrosting control method of the present invention.
- the steps of the defrosting control method specifically include:
- step S11 the control device of the air conditioner can obtain the suction pressure Ps of the air conditioner and the coil temperature Te of the outdoor unit through the suction pressure sensor and the temperature sensor, So that the control device can use the suction pressure Ps and the coil temperature Te as the basic parameters to determine the frost formation of the outdoor unit.
- step S12 is executed.
- the control device can compare the suction pressure Ps with the preset suction pressure P1, and at the same time, compare the coil temperature Te with the first preset temperature T1 and / or the second preset temperature T2, respectively. The comparison is performed to determine the frosting degree of the outdoor unit according to a comparison result between the measured value and the standard value.
- the preset suction pressure P1 is set to 0.5 MPa.
- the suction pressure is 0.5 MPa
- the corresponding saturated evaporation temperature is ⁇ 8.8 ° C.
- the preset air intake pressure is set.
- P1 is set to 0.5 MPa to effectively analyze the severity of frost formation of the outdoor unit.
- the control device also needs to compare the coil temperature Te with the first preset temperature T1 and / or the second preset temperature T2.
- the first preset temperature T1 is set to -9 ° C
- the second preset temperature T2 is set to -3 ° C.
- step S13 if the control device judges that Ps ⁇ P1 and T1 ⁇ Te ⁇ T2, it means that the outdoor unit is still in a light frosting state.
- the air conditioner enters the first A defrost mode, that is, the air conditioner can directly introduce a part of the high-temperature and high-pressure heat exchange medium discharged from the compressor 1 into the outdoor heat exchanger 4 through the defrost hot gas bypass line, thereby improving outdoor heat exchange
- the temperature of the device 4 is used to alleviate the frost phenomenon.
- the air conditioner since the frosting degree of the outdoor unit is still relatively light at this time, the air conditioner only needs to perform auxiliary defrosting through the defrosting hot gas bypass pipeline to achieve the defrost purpose, and at the same time, it can also Effectively ensure that the air conditioner can continuously heat, so as to effectively ensure the heat generation of the air conditioner.
- step S14 after the air conditioner enters the first defrost mode, if the control device determines that Te ⁇ T3, the air conditioner is caused to exit the first defrost mode. .
- the control device determines that Te ⁇ T3
- the air conditioner is caused to exit the first defrost mode.
- the third preset temperature is 3 ° C; of course, a technician can also set a specific value of the third preset temperature according to actual use requirements.
- step S15 if the control device determines that Ps ⁇ P1 and Te ⁇ T1, it means that the outdoor unit of the air conditioner is already in a state of severe frost.
- the air conditioner is made
- the heater enters the second defrost mode, that is, the heating operation is stopped, and the heat exchange medium in the main circulation circuit of the air conditioner is reversely circulated, so that the outdoor heat exchanger 4 works as a condenser, so as to achieve better defrost. Frost effect. It can be understood that, since the frosting degree of the outdoor unit is already severe at this time, the effect of complete defrost cannot be achieved by running the first defrost mode.
- a defrost mode so that the outdoor unit can quickly implement defrost, so that the air conditioner can return to a normal heating state as soon as possible.
- step S16 after the air conditioner enters the second defrost mode, if the control device determines that Te ⁇ T4, the air conditioner is caused to exit the second defrost mode. .
- the control device determines that Te ⁇ T4
- the air conditioner is caused to exit the second defrost mode.
- the control device defaults that the outdoor unit has completed defrosting. At this time, the air conditioner needs to exit the second defrosting mode.
- the fourth preset temperature is 15 ° C; of course, a technician may also set a specific value of the fourth preset temperature according to actual use requirements.
- the control device compares the suction pressure Ps with the preset suction pressure P1, and compares the coil temperature Te with the first preset temperature T1 and / or the second preset temperature T2 are compared respectively. If other comparison results appear, it means that it is difficult for the control device to accurately determine the frost condition of the outdoor unit.
- the air conditioner may also need to Only in combination with other parameters can the frosting condition of the outdoor unit be determined or the determination result can be directly set to the outdoor unit without performing a defrost operation. In other words, the technician can set operations corresponding to other comparison results by himself according to the actual condition of the air conditioner.
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Abstract
The invention relates to the technology field of an air conditioner and in particular relates to an air conditioner and an outdoor unit defrosting control method thereof. The present invention aims at solving the problem that the existing air conditioner cannot execute different defrosting methods according to different conditions, and the heating effect can be severly influenced by the frosting phenomenon of the outdoor unit. The outdoor unit defrosting control method according to the present invention comprises: When the air conditioner is in a heating operation, an air suction pressure of the air conditioner and a coiled pipe temperature of the outdoor unit can be obtained so that the frosting degree of the outdoor unit is estimated. According to the air suction pressure of the air conditioner and the coiled pipe temperature of the outdoor unit, the air conditioner selectively enters the corresponding outdoor unit defrosting mode such that the air conditioner can select the optimal defrosting mode according to the defrosting degree of the outdoor unit, furthermore, the following problem of the existing air conditioner is solved: the heating effect is severely influenced as the selected defrosting mode is not matched with the actual frosting condition.
Description
本发明属于空调技术领域，具体涉及一种空调器及其室外机除霜控制方法。The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and an outdoor unit defrost control method thereof.
随着人们生活水平的不断提高，人们对生活环境也提出了越来越高的要求。为了维持舒适的环境温度，空调器已经成为人们生活中必不可少的一种设备。通常地，空调器包括室内机、室外机以及用于连接室内机与室外机的循环回路，空调器中的换热介质通过循环回路在室外机与室内机之间不断换热，从而达到改变室温的效果。以空调器制热运行时为例，室外机的盘管始终处于温度较低的状态；此时，如果室外环境具有较高湿度时，室外机的盘管就很容易产生结霜现象，这种结霜现象的产生会严重影响室外机的换热效率，使得空调器的换热效果不断减弱，进而影响室内环境的舒适度。因此，在空调器制热运行时，空调器需要确保室外机的盘管没有产生结霜现象。With the continuous improvement of people's living standards, people have put forward higher and higher requirements on the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an essential device in people's lives. Generally, an air conditioner includes an indoor unit, an outdoor unit, and a circulation circuit for connecting the indoor unit and the outdoor unit. The heat exchange medium in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation circuit, so as to change the room temperature. Effect. Take the heating operation of the air conditioner as an example, the coil of the outdoor unit is always in a low temperature state; at this time, if the outdoor environment has high humidity, the coil of the outdoor unit is prone to frost. The occurrence of frost will seriously affect the heat exchange efficiency of the outdoor unit, which will continuously weaken the heat exchange effect of the air conditioner, and then affect the comfort of the indoor environment. Therefore, during heating operation of the air conditioner, the air conditioner needs to ensure that the coil of the outdoor unit does not generate frost.
具体而言，现有空调技术领域主要存在两种除霜控制方法，第一种方法是：所述空调器暂停制热运行，使循环回路中的换热介质执行逆循环操作来实现除霜；第二种方法是：为所述空调器增设除霜热气旁通管路，以便将压缩机排出的高温换热介质直接引入室外换热器中来实现除霜。可以理解的是，第一种除霜控制方式虽然除霜效果良好，但是却会影响空调器的正常制热运行；而第二种除霜控制方式虽然不会影响空调器的正常制热运行，但是其除霜效果却不是很好。现有每种空调器都只能执行其中一种除霜控制方法，从而导致现有空调器的制热效果很容易因室外机产生结霜现象而受到严重影响。Specifically, there are mainly two defrosting control methods in the existing air-conditioning technology field. The first method is to suspend heating operation of the air conditioner, and perform a reverse circulation operation on the heat exchange medium in the circulation circuit to achieve defrosting; The second method is to add a defrosting hot gas bypass line to the air conditioner, so as to directly introduce the high-temperature heat exchange medium discharged from the compressor into the outdoor heat exchanger to realize defrosting. It can be understood that although the first defrost control method has a good defrost effect, it will affect the normal heating operation of the air conditioner; while the second defrost control method does not affect the normal heating operation of the air conditioner, But its defrosting effect is not very good. Each of the existing air conditioners can only implement one of the defrosting control methods, so that the heating effect of the existing air conditioners is easily affected by the frosting phenomenon of the outdoor unit.
相应地，本领域需要一种新的空调器及其室外机除霜控制方法来解决上述问题。Accordingly, there is a need in the art for a new air conditioner and a defrost control method for an outdoor unit thereof to solve the above problems.
发明内容Summary of the Invention
为了解决现有技术中的上述问题，即为了解决现有空调器不能根据不同的情况执行不同的除霜方法，从而导致现有空调器的制热效果很容易因室外机产生结霜现象而受到严重影响的问题，本发明提供了一种用于空调器的室外机除霜控制方法，所述除霜控制方法包括：在所述空调器制热运行时，获取所述空调器的吸气压力以及所述室外机的盘管温度；根据所述空调器的吸气压力以及所述室外机的盘管温度，选择性地使所述空调器进入相应的室外机除霜模式。In order to solve the above problems in the prior art, that is, to solve the problem that the existing air conditioner cannot perform different defrosting methods according to different situations, the heating effect of the existing air conditioner is easily affected by the frosting phenomenon of the outdoor unit. For severely affected problems, the present invention provides a defrost control method for an outdoor unit of an air conditioner. The defrost control method includes: obtaining an air intake pressure of the air conditioner during a heating operation of the air conditioner. And the coil temperature of the outdoor unit; and according to the suction pressure of the air conditioner and the coil temperature of the outdoor unit, the air conditioner is selectively brought into a corresponding outdoor unit defrost mode.
在上述用于空调器的室外机除霜控制方法的优选技术方案中，“根据所述空调器的吸气压力以及所述室外机的盘管温度，选择性地使所述空调器进入相应的室外机除霜模式”的步骤具体包括：将所述吸气压力与预设吸气压力进行比较，并且将所述盘管温度与第一预设温度和/或第二预设温度进行比较；根据所述吸气压力与所述预设吸气压力的比较结果以及所述盘管温度与所述第一预设温度和/或所述第二预设温度的比较结果，选择性地使所述空调器进入相应的室外机除霜模式；其中，所述第一预设温度小于所述第二预设温度。In a preferred technical solution of the above-mentioned outdoor unit defrost control method for an air conditioner, "the air conditioner is selectively caused to enter a corresponding air conditioner according to the suction pressure of the air conditioner and the coil temperature of the outdoor unit. The step of "outdoor unit defrost mode" specifically includes: comparing the suction pressure with a preset suction pressure, and comparing the coil temperature with a first preset temperature and / or a second preset temperature; Selectively comparing the suction pressure with the preset suction pressure and the comparison result of the coil temperature with the first preset temperature and / or the second preset temperature The air conditioner enters a corresponding outdoor unit defrost mode; wherein the first preset temperature is lower than the second preset temperature.
在上述用于空调器的室外机除霜控制方法的优选技术方案中，“根据所述吸气压力与所述预设吸气压力的比较结果以及所述盘管温度与所述第一预设温度和/或所述第二预设温度的比较结果，选择性地使所述空调器进入相应的室外机除霜模式”的步骤具体包括：如果所述吸气压力大于等于所述预设吸气压力，并且所述盘管温度大于等于所述第一预设温度且小于等于所述第二预设温度，则使所述空调器进入第一除霜模式。In a preferred technical solution of the above-mentioned outdoor unit defrost control method for an air conditioner, "based on a comparison result between the suction pressure and the preset suction pressure, and the coil temperature and the first preset The result of comparing the temperature and / or the second preset temperature to selectively cause the air conditioner to enter a corresponding outdoor unit defrost mode "specifically includes: if the suction pressure is greater than or equal to the preset suction Air pressure, and the coil temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the air conditioner is caused to enter a first defrost mode.
在上述用于空调器的室外机除霜控制方法的优选技术方案中，所述除霜控制方法还包括：在所述空调器进入所述第一除霜模式后，如果所述室外机的盘管温度大于等于第三预设温度，则使所述空调器退出所述第一除霜模式。In the above-mentioned preferred technical solution of the outdoor unit defrost control method for an air conditioner, the defrost control method further includes: after the air conditioner enters the first defrost mode, The tube temperature is greater than or equal to a third preset temperature, so that the air conditioner exits the first defrost mode.
在上述用于空调器的室外机除霜控制方法的优选技术方案中，“使所述空调器进入第一除霜模式”的步骤具体包括：在所述空调器制热运行时，将所述空调器的压缩机输出的换热介质直接引入所述室外机的换热器的进气口处。In a preferred technical solution of the above-mentioned outdoor unit defrost control method for an air conditioner, the step of "entering the air conditioner into a first defrost mode" specifically includes: during a heating operation of the air conditioner, The heat exchange medium output from the compressor of the air conditioner is directly introduced into the air inlet of the heat exchanger of the outdoor unit.
在上述用于空调器的室外机除霜控制方法的优选技术方案中，“根据所述吸气压力与所述预设吸气压力的比较结果以及所述盘管温度与所述第一预设温度和/或所述第二预设温度的比较结果，选择性地使所述空调器进入相应的室外机除霜模式”的步骤具体包括：如果所述吸气压力小于所述预设吸气压力，并且所述盘管温度小于所述第一预设温度，则使所述空调器进入第二除霜模式。In a preferred technical solution of the above-mentioned outdoor unit defrost control method for an air conditioner, "based on a comparison result between the suction pressure and the preset suction pressure, and the coil temperature and the first preset The result of comparing the temperature and / or the second preset temperature to selectively cause the air conditioner to enter a corresponding outdoor unit defrost mode "specifically includes: if the suction pressure is less than the preset suction Pressure, and the coil temperature is lower than the first preset temperature, the air conditioner is put into a second defrost mode.
在上述用于空调器的室外机除霜控制方法的优选技术方案中，所述除霜控制方法还包括：在所述空调器进入所述第二除霜模式后，如果所述室外机的盘管温度大于等于第四预设温度，则使所述空调器退出所述第二除霜模式。In a preferred technical solution of the outdoor unit defrost control method for an air conditioner, the defrost control method further includes: after the air conditioner enters the second defrost mode, if The tube temperature is greater than or equal to the fourth preset temperature, so that the air conditioner exits the second defrost mode.
在上述用于空调器的室外机除霜控制方法的优选技术方案中，“使所述空调器进入第二除霜模式”的步骤具体包括：使所述空调器的循环回路执行换热介质逆循环操作。In a preferred technical solution of the above-mentioned outdoor unit defrost control method for an air conditioner, the step of "making the air conditioner enter a second defrost mode" specifically includes: causing a circulation circuit of the air conditioner to perform a heat exchange medium inversion Cycle operation.
本发明还提供了一种空调器，所述空调器包括控制装置，所述控制装置能够执行上述任一项优选技术方案中所述的室外机除霜控制方法。The present invention also provides an air conditioner. The air conditioner includes a control device capable of performing the outdoor unit defrost control method described in any one of the foregoing preferred technical solutions.
在上述空调器的优选技术方案中，所述空调器还包括除霜热气旁通管路，所述除霜热气旁通管路用于将所述空调器的压缩机排出的换热介质引入所述室外机的换热器中。In a preferred technical solution of the air conditioner, the air conditioner further includes a defrost hot gas bypass line, and the defrost hot gas bypass line is used to introduce a heat exchange medium discharged from a compressor of the air conditioner into the air conditioner. The heat exchanger of the outdoor unit is described.
本领域技术人员能够理解的是，在本发明的技术方案中，本发明的用于空调器的室外机除霜控制方法包括：在所述空调器制热运行时，获取所述空调器的吸气压力以及所述室外机的盘管温度，以便判断所述室外机的结霜程度；根据所述空调器的吸气压力以及所述室外机的盘管温度，选择性地使所述空调器进入相应的室外机除霜模式，以便所述空调器能够根据所述室外机的结霜程度来选择最优的除霜模式，与现有技术中空调器只能执行单一除霜模式的技术方案相比，本发明使空调器的除霜方式变得更加智能和灵活，从而有效避免现有空调器容易因选择的除霜方式与结霜情况不够匹配而严重影响制热效果的问题。Those skilled in the art can understand that, in the technical solution of the present invention, the outdoor unit defrosting control method for an air conditioner of the present invention includes: when the air conditioner is in a heating operation, obtaining a suction of the air conditioner; Air pressure and the coil temperature of the outdoor unit in order to determine the degree of frosting of the outdoor unit; selectively enabling the air conditioner according to the air intake pressure of the air conditioner and the coil temperature of the outdoor unit Enter the corresponding defrost mode of the outdoor unit, so that the air conditioner can select the optimal defrost mode according to the degree of frosting of the outdoor unit, and the technical solution that the air conditioner can only perform a single defrost mode in the prior art In comparison, the present invention makes the defrost mode of the air conditioner more intelligent and flexible, thereby effectively avoiding the problem that the existing air conditioner is likely to seriously affect the heating effect because the selected defrost mode does not match the frost condition.
图1是本发明的空调器的***结构示意图；1 is a schematic diagram of a system structure of an air conditioner according to the present invention;
图2是本发明的除霜控制方法的主要步骤流程图；2 is a flowchart of main steps of the defrosting control method of the present invention;
图3是本发明的除霜控制方法的具体步骤流程图。FIG. 3 is a flowchart of specific steps of the defrosting control method of the present invention.
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。例如，尽管本申请中按照特定顺序描述了本发明的方法的各个步骤，但是这些顺序并不是限制性的，在不偏离本发明的基本原理的前提下，本领域技术人员可以按照不同的顺序来执行所述步骤。Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the steps of the method of the present invention are described in a specific order in this application, these orders are not restrictive, and those skilled in the art may follow different orders without departing from the basic principles of the present invention. Perform the steps.
基于背景技术中提出的现有每种空调器都只能执行单一的除霜控制方法，而不能根据不同的结霜情况执行不同的除霜方法，从而导致现有空调器的制热效果很容易因室外机产生结霜现象而受到严重影响的问题。为了解决上述问题，本发明提供了一种用于空调器的室外机除霜控制方法，所述除霜控制方法包括：在所述空调器制热运行时，获取所述空调器的吸气压力以及所述室外机的盘管温度；根据所述空调器的吸气压力以及所述室外机的盘管温度，选择性地使所述空调器进入相应的室外机除霜模式。Based on the existing air conditioners proposed in the background, each type of air conditioner can only perform a single defrost control method, and cannot perform different defrost methods according to different frosting conditions. As a result, the heating effect of the existing air conditioner is easy. A problem that is seriously affected by the frosting phenomenon of the outdoor unit. In order to solve the above problem, the present invention provides a defrost control method for an outdoor unit of an air conditioner. The defrost control method includes: when the air conditioner is in a heating operation, obtaining an air intake pressure of the air conditioner. And the coil temperature of the outdoor unit; and according to the suction pressure of the air conditioner and the coil temperature of the outdoor unit, the air conditioner is selectively brought into a corresponding outdoor unit defrost mode.
首先参阅图1，该图是本发明的空调器的***结构示意图；如图1所示，在本优选实施例中，所述空调器包括主循环回路以及与所述主循环回路相连通的除霜热气旁通管路；其中，所述主循环回路上设置有彼此连通的压缩机1、四通阀2、室内换热器3、室外换热器4和电子膨胀阀5，所述除霜热气旁通管路用于将压缩机1排出的换热介质引入室外换热器4中，并且所述除霜热气旁通管路上设置有电磁阀6，以便控制所述除霜热气旁通管路的通断，当然，电磁阀6还可以使用其他具有开关作用的构件替代。同时，本领域技术人员能够理解的是，技术人员也可以根据实际使用需求自行调整所述空调器的具体结构以及所用构件的具体类型，这些具体结构的改变并不偏离本发明的保护范围，只要所述空调器设置有除霜热气旁通管路即可。First, refer to FIG. 1, which is a schematic structural diagram of an air conditioner according to the present invention. As shown in FIG. 1, in the preferred embodiment, the air conditioner includes a main circulation circuit and a Frost and hot gas bypass pipeline; wherein the main circulation circuit is provided with a compressor 1, a four-way valve 2, an indoor heat exchanger 3, an outdoor heat exchanger 4, and an electronic expansion valve 5, which are connected to each other, and the defrosting The hot gas bypass line is used to introduce the heat exchange medium discharged from the compressor 1 into the outdoor heat exchanger 4, and a solenoid valve 6 is provided on the defrost hot gas bypass line to control the defrost hot gas bypass line Of course, the solenoid valve 6 can also be replaced by other components having a switching function. At the same time, those skilled in the art can understand that the technicians can also adjust the specific structure of the air conditioner and the specific types of components used according to the actual use requirements. Changes in these specific structures do not depart from the scope of protection of the present invention. The air conditioner may be provided with a defrosting hot gas bypass line.
进一步地，所述空调器还包括控制装置，所述控制装置能够执行本发明的除霜控制方法；当然，所述控制装置可以是所述空调器原 有的控制器，也可以是技术人员为运行所述控制方法而单独设置的控制器等。同时，压缩机1的吸气口处设置有吸气压力传感器，并且所述室外机的盘管上设置有温度传感器，所述空调器的控制装置能够通过所述吸气压力传感器获取压缩机1的吸气压力值，通过所述温度传感器获取所述室外机的盘管温度。本领域技术人员能够理解的是，本发明不对所述吸气压力传感器和所述温度传感器的具体类型作任何限制，只要所述控制装置能够分别通过所述吸气压力传感器和所述温度传感器获取吸气压力和外盘管温度即可。Further, the air conditioner further includes a control device capable of performing the defrosting control method of the present invention; of course, the control device may be an original controller of the air conditioner or a technician for A controller and the like that are separately provided to run the control method. At the same time, an intake pressure sensor is provided at the suction port of the compressor 1, and a temperature sensor is provided at the coil of the outdoor unit. The control device of the air conditioner can obtain the compressor 1 through the intake pressure sensor. And the coil temperature of the outdoor unit through the temperature sensor. Those skilled in the art can understand that the present invention does not place any restrictions on the specific types of the inspiratory pressure sensor and the temperature sensor, as long as the control device can obtain them through the inspiratory pressure sensor and the temperature sensor, respectively. Inspiratory pressure and outer coil temperature are sufficient.
可以理解的是，在所述空调器制热运行时，室外换热器4的温度较低，此时，室外换热器4很容易产生结霜现象；而本发明通过设置除霜热气旁通管路，使得压缩机1排出的部分高温高压的换热介质能够通过所述除霜热气旁通管路直接引入至室外换热器4中，从而提高室外换热器4的温度，进而有效缓解结霜现象。需要说明的是，在本实施例中将这种除霜方式定义为第一除霜模式；这种利用除霜热气旁通管路进行除霜的方式虽然存在除霜能力不佳的问题，但是却能够保证所述空调器持续运行制热模式；换言之，这种除霜方式对空调器制热量的影响较小，但是，当室外换热器4出现较严重的结霜现象时，这种除霜方式就很难达到较好的除霜效果。需要说明的是，所述除霜热气旁通管路两端的连接位置并不是固定的，技术人员可以根据实际使用情况自行设置所述除霜热气旁通管路的连接位置，只要所述除霜热气旁通管路能够将高温高压的换热介质引入室外换热器4中即可。与此同时，所述空调器还存在另一种除霜方式，即所述空调器还可以通过使所述主循环回路中的换热介质进行逆循环，以使室外换热器4作为冷凝器来工作，从而达到除霜效果。在此，需要说明的是，在本实施例中将这种除霜方式定义为第二除霜模式；这种使换热介质逆循环来实现除霜的方式虽然具有良好的除霜效果，但是却需要所述空调器停止制热运行，因此，所述第二除霜模式的运行必然会严重影响所述空调器的制热量。It can be understood that, during the heating operation of the air conditioner, the temperature of the outdoor heat exchanger 4 is relatively low. At this time, the outdoor heat exchanger 4 is prone to frost formation; and the present invention provides a defrost hot gas bypass. Piping, so that part of the high-temperature and high-pressure heat exchange medium discharged from the compressor 1 can be directly introduced into the outdoor heat exchanger 4 through the defrosting hot gas bypass pipeline, thereby increasing the temperature of the outdoor heat exchanger 4 and further effectively alleviating it Frost phenomenon. It should be noted that, in this embodiment, this defrosting method is defined as the first defrosting mode; this method of defrosting by using a defrosting hot gas bypass pipeline has a problem of poor defrosting ability, but However, it can ensure that the air conditioner continues to run in the heating mode; in other words, this defrost method has a small effect on the heat generation of the air conditioner. However, when the outdoor heat exchanger 4 has a severe frost phenomenon, the defrost It is difficult to achieve a good defrosting effect with the frost method. It should be noted that the connection positions of the two ends of the defrost hot gas bypass pipeline are not fixed, and a technician can set the connection positions of the defrost hot gas bypass pipeline according to the actual use situation, as long as the defrost The hot gas bypass pipeline can introduce the high-temperature and high-pressure heat exchange medium into the outdoor heat exchanger 4. At the same time, there is another defrosting method for the air conditioner, that is, the air conditioner can also perform a reverse circulation of the heat exchange medium in the main circulation circuit, so that the outdoor heat exchanger 4 serves as a condenser. To work to achieve the defrost effect. Here, it should be noted that in this embodiment, this defrosting method is defined as the second defrosting mode; this method of reversely circulating the heat exchange medium to achieve defrosting has a good defrosting effect, but However, the air conditioner needs to stop heating operation, so the operation of the second defrosting mode will inevitably seriously affect the heating capacity of the air conditioner.
接着参阅图2，该图是本发明的除霜控制方法的主要步骤流程图。如图2所示，所述除霜控制方法的步骤主要包括：Next, refer to FIG. 2, which is a flowchart of main steps of the defrosting control method of the present invention. As shown in FIG. 2, the steps of the defrosting control method mainly include:
S1：在空调器制热运行时，获取空调器的吸气压力以及室外机的盘管温度；S1: During the heating operation of the air conditioner, obtain the suction pressure of the air conditioner and the coil temperature of the outdoor unit;
S2：根据空调器的吸气压力以及室外机的盘管温度，选择性地使空调器进入相应的室外机除霜模式。S2: According to the suction pressure of the air conditioner and the coil temperature of the outdoor unit, the air conditioner is selectively brought into the corresponding outdoor unit defrost mode.
进一步地，在步骤S1中，所述空调器的控制装置能够通过所述吸气压力传感器和所述温度传感器来获取所述空调器的吸气压力以及所述室外机的盘管温度，以便所述控制装置能够将所述吸气压力和所述盘管温度作为基本参数来判断所述室外机的结霜情况。接着，在步骤S2中，所述控制装置能够根据所述吸气压力和所述盘管温度，选择性地使所述空调器进入相应的室外机除霜模式。即在本控制方法中，所述控制装置能够结合所述吸气压力和所述盘管温度来判断所述室外机的结霜程度，以便所述空调器能够根据所述室外机的结霜程度来选择不同的除霜模式，与现有空调器只能执行单一除霜模式的技术方案相比，本发明的控制方法能够使得所述空调器的除霜方式变得更加智能和灵活，从而有效避免现有空调器容易因选择的除霜方式与结霜情况不够匹配而严重影响制热效果的问题，进而最大程度地保证所述空调器的制热量。Further, in step S1, the control device of the air conditioner can obtain the suction pressure of the air conditioner and the coil temperature of the outdoor unit through the suction pressure sensor and the temperature sensor, so that The control device can use the suction pressure and the coil temperature as basic parameters to determine the frost formation of the outdoor unit. Next, in step S2, the control device can selectively cause the air conditioner to enter a corresponding outdoor unit defrost mode according to the suction pressure and the coil temperature. That is, in the control method, the control device can determine the frosting degree of the outdoor unit by combining the suction pressure and the coil temperature, so that the air conditioner can determine the frosting degree of the outdoor unit. To select different defrost modes, compared with the technical solution that the existing air conditioner can only perform a single defrost mode, the control method of the present invention can make the defrost mode of the air conditioner more intelligent and flexible, thereby being effective Avoiding the problem that the existing air conditioner is likely to seriously affect the heating effect due to the insufficient matching of the defrosting method and the frosting situation, thereby ensuring the heating capacity of the air conditioner to the greatest extent.
接着参阅图3，该图是本发明的除霜控制方法的具体步骤流程图。如图3所示，所述除霜控制方法的步骤具体包括：Next, refer to FIG. 3, which is a flowchart of specific steps of the defrosting control method of the present invention. As shown in FIG. 3, the steps of the defrosting control method specifically include:
S11：在空调器制热运行时，获取空调器的吸气压力Ps以及室外机的盘管温度Te；S11: During the heating operation of the air conditioner, obtain the suction pressure Ps of the air conditioner and the coil temperature Te of the outdoor unit;
S12：将吸气压力Ps与预设吸气压力P1进行比较，盘管温度Te与第一预设温度T1和/或第二预设温度T2进行比较；S12: Compare the suction pressure Ps with the preset suction pressure P1, and compare the coil temperature Te with the first preset temperature T1 and / or the second preset temperature T2;
S13：当Ps≥P1且T1≤Te≤T2时，使空调器进入第一除霜模式；S13: When Ps≥P1 and T1≤Te≤T2, the air conditioner is put into the first defrost mode;
S14：当Te≥T3时，使空调器退出第一除霜模式；S14: When Te≥T3, make the air conditioner exit the first defrost mode;
S15：当Ps＜P1且Te＜T1时，使空调器进入第二除霜模式；S15: When Ps <P1 and Te <T1, make the air conditioner enter the second defrost mode;
S16：当Te≥T4时，使空调器退出第二除霜模式。S16: When Te≥T4, make the air conditioner exit the second defrost mode.
进一步地，在步骤S11中，所述空调器的控制装置能够通过所述吸气压力传感器和所述温度传感器来获取所述空调器的吸气压力Ps以及所述室外机的盘管温度Te，以便所述控制装置能够将吸气压力Ps和盘管温度Te作为基本参数来判断所述室外机的结霜情况。接着，执行步骤S12，所述控制装置能够将吸气压力Ps与预设吸气压力P1进行比较，同时，将盘管温度Te与第一预设温度T1和/或第二预设温度T2分别进 行比较，以便根据测量值与标准值的比较结果来判断所述室外机的结霜程度。Further, in step S11, the control device of the air conditioner can obtain the suction pressure Ps of the air conditioner and the coil temperature Te of the outdoor unit through the suction pressure sensor and the temperature sensor, So that the control device can use the suction pressure Ps and the coil temperature Te as the basic parameters to determine the frost formation of the outdoor unit. Next, step S12 is executed. The control device can compare the suction pressure Ps with the preset suction pressure P1, and at the same time, compare the coil temperature Te with the first preset temperature T1 and / or the second preset temperature T2, respectively. The comparison is performed to determine the frosting degree of the outdoor unit according to a comparison result between the measured value and the standard value.
需要说明的是，作为一种优选实施例，将预设吸气压力P1设置为0.5MPa，本领域技术人员能够知晓的是，当吸气压力为0.5Mpa时，其对应的饱和蒸发温度是-8.8℃，经过反复实验得知，当所述空调器的吸气压力小于0.5MPa时，所述空调器就开始出现较为严重的结霜现象，因此，本优选实施例通过将预设吸气压力P1设置为0.5MPa来有效分析所述室外机结霜的严重程度。为了进一步提高判断结果的准确性，所述控制装置还需要将盘管温度Te与第一预设温度T1和/或第二预设温度T2进行比较，优选地，第一预设温度T1设置为-9℃，第二预设温度T2设置为-3℃，经过多次实验得知，当盘管温度Te在-3℃至-9℃之间时，所述室外机的结霜情况还处于较轻状态。当然，本领域技术人员能够理解的是，技术人员也可以根据实际情况自行设定预设吸气压力P1、第一预设温度T1和第二预设温度T2的具体取值。It should be noted that, as a preferred embodiment, the preset suction pressure P1 is set to 0.5 MPa. Those skilled in the art can know that when the suction pressure is 0.5 MPa, the corresponding saturated evaporation temperature is − 8.8 ° C. After repeated experiments, it is learned that when the air intake pressure of the air conditioner is less than 0.5 MPa, the air conditioner starts to have a relatively serious frost phenomenon. Therefore, in this preferred embodiment, the preset air intake pressure is set. P1 is set to 0.5 MPa to effectively analyze the severity of frost formation of the outdoor unit. In order to further improve the accuracy of the judgment result, the control device also needs to compare the coil temperature Te with the first preset temperature T1 and / or the second preset temperature T2. Preferably, the first preset temperature T1 is set to -9 ° C, the second preset temperature T2 is set to -3 ° C. After several experiments, it is known that when the coil temperature Te is between -3 ° C and -9 ° C, the frosting condition of the outdoor unit is still at Lighter state. Of course, those skilled in the art can understand that the technicians can also set specific values of the preset suction pressure P1, the first preset temperature T1, and the second preset temperature T2 according to the actual situation.
进一步地，在步骤S13中，如果所述控制装置判断Ps≥P1且T1≤Te≤T2时，则说明所述室外机还处于结霜情况较轻的状态，此时，所述空调器进入第一除霜模式，即所述空调器能够通过所述除霜热气旁通管路使压缩机1排出的部分高温高压的换热介质直接被引入至室外换热器4中，从而提高室外换热器4的温度来缓解结霜现象。可以理解的是，由于此时所述室外机的结霜程度还较轻，所述空调器只需要通过所述除霜热气旁通管路进行辅助除霜即可达到除霜目的，同时还能够有效保证所述空调器能够持续制热，以便有效保证所述空调器的制热量。Further, in step S13, if the control device judges that Ps≥P1 and T1≤Te≤T2, it means that the outdoor unit is still in a light frosting state. At this time, the air conditioner enters the first A defrost mode, that is, the air conditioner can directly introduce a part of the high-temperature and high-pressure heat exchange medium discharged from the compressor 1 into the outdoor heat exchanger 4 through the defrost hot gas bypass line, thereby improving outdoor heat exchange The temperature of the device 4 is used to alleviate the frost phenomenon. It can be understood that since the frosting degree of the outdoor unit is still relatively light at this time, the air conditioner only needs to perform auxiliary defrosting through the defrosting hot gas bypass pipeline to achieve the defrost purpose, and at the same time, it can also Effectively ensure that the air conditioner can continuously heat, so as to effectively ensure the heat generation of the air conditioner.
更进一步地，在步骤S14中，在所述空调器进入所述第一除霜模式后，如果所述控制装置判断出Te≥T3时，则使所述空调器退出所述第一除霜模式。可以理解的是，当盘管温度Te达到第三预设温度时，所述控制装置就默认为所述室外机已经完成除霜，此时，所述空调器需要退出所述第一除霜模式，以便有效节约能源并且进一步有效保证所述空调器的制热效果。优选地，所述第三预设温度为3℃；当然，技术人员也可以根据实际使用需求自行设定所述第三预设温度的具体取值。Further, in step S14, after the air conditioner enters the first defrost mode, if the control device determines that Te ≧ T3, the air conditioner is caused to exit the first defrost mode. . It can be understood that when the coil temperature Te reaches a third preset temperature, the control device defaults that the outdoor unit has completed defrosting. At this time, the air conditioner needs to exit the first defrosting mode. In order to effectively save energy and further effectively ensure the heating effect of the air conditioner. Preferably, the third preset temperature is 3 ° C; of course, a technician can also set a specific value of the third preset temperature according to actual use requirements.
接着参阅图3，在步骤S15中，如果所述控制装置判断Ps＜P1且Te＜T1时，则说明所述空调器的室外机已经处于结霜较严重的 状态，此时，使所述空调器进入第二除霜模式，即停止制热运行，使所述空调器的主循环回路中的换热介质进行逆循环，以使室外换热器4作为冷凝器工作，从而达到更好的除霜效果。可以理解的是，由于此时所述室外机的结霜程度已经较为严重，因此，运行所述第一除霜模式已经无法达到彻底除霜的效果，此时，使所述空调器运行第二除霜模式，以使所述室外机能够快速实现除霜，以便使得所述空调器能够尽快回归至正常制热的状态。Next, referring to FIG. 3, in step S15, if the control device determines that Ps <P1 and Te <T1, it means that the outdoor unit of the air conditioner is already in a state of severe frost. At this time, the air conditioner is made The heater enters the second defrost mode, that is, the heating operation is stopped, and the heat exchange medium in the main circulation circuit of the air conditioner is reversely circulated, so that the outdoor heat exchanger 4 works as a condenser, so as to achieve better defrost. Frost effect. It can be understood that, since the frosting degree of the outdoor unit is already severe at this time, the effect of complete defrost cannot be achieved by running the first defrost mode. A defrost mode, so that the outdoor unit can quickly implement defrost, so that the air conditioner can return to a normal heating state as soon as possible.
更进一步地，在步骤S16中，在所述空调器进入所述第二除霜模式后，如果所述控制装置判断出Te≥T4时，则使所述空调器退出所述第二除霜模式。可以理解的是，当盘管温度Te达到第四预设温度时，所述控制装置就默认为所述室外机已经完成除霜，此时，所述空调器需要退出所述第二除霜模式，以便所述空调器能够尽快运行制热模式，进而最大程度地保证所述空调器的平均制热量。优选地，所述第四预设温度为15℃；当然，技术人员也可以根据实际使用需求自行设定所述第四预设温度的具体取值。Further, in step S16, after the air conditioner enters the second defrost mode, if the control device determines that Te ≧ T4, the air conditioner is caused to exit the second defrost mode. . It can be understood that when the coil temperature Te reaches a fourth preset temperature, the control device defaults that the outdoor unit has completed defrosting. At this time, the air conditioner needs to exit the second defrosting mode. In order that the air conditioner can run the heating mode as soon as possible, thereby ensuring the average heating capacity of the air conditioner to the greatest extent. Preferably, the fourth preset temperature is 15 ° C; of course, a technician may also set a specific value of the fourth preset temperature according to actual use requirements.
最后，本领域技术人员还能够理解的是，作为一种实施方式，当所述控制装置将吸气压力Ps与预设吸气压力P1进行比较，并且将盘管温度Te与第一预设温度T1和/或第二预设温度T2分别进行比较，如果出现其他比较结果，则说明所述控制装置较难准确判断出所述室外机的结霜情况，此时，所述空调器可能还需要结合其他参数才能对所述室外机的结霜情况进行判断或者也可以直接将判断结果设定为所述室外机无需进行除霜操作。换言之，技术人员可以根据所述空调器的实际情况自行设定其他比较结果相对应的操作。Finally, those skilled in the art can also understand that, as an embodiment, when the control device compares the suction pressure Ps with the preset suction pressure P1, and compares the coil temperature Te with the first preset temperature T1 and / or the second preset temperature T2 are compared respectively. If other comparison results appear, it means that it is difficult for the control device to accurately determine the frost condition of the outdoor unit. At this time, the air conditioner may also need to Only in combination with other parameters can the frosting condition of the outdoor unit be determined or the determination result can be directly set to the outdoor unit without performing a defrost operation. In other words, the technician can set operations corresponding to other comparison results by himself according to the actual condition of the air conditioner.
最后需要说明的是，上述实施例均是本发明的优选实施方案，并不作为对本发明保护范围的限制。本领域技术人员在实际使用本发明时，可以根据需要适当添加或删减一部分步骤，或者调换不同步骤之间的顺序。这种改变并没有超出本发明的基本原理，属于本发明的保护范围。Finally, it should be noted that the above examples are all preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Those skilled in the art can actually add or delete a part of the steps, or reverse the order between different steps when the invention is actually used. This change does not exceed the basic principle of the present invention, and belongs to the protection scope of the present invention.
至此，已经结合附图描述了本发明的优选实施方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对 相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。So far, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical solutions after these changes or replacements will fall into the protection scope of the present invention.
Claims (10)
- 一种用于空调器的室外机除霜控制方法，其特征在于，所述除霜控制方法包括：An outdoor unit defrost control method for an air conditioner is characterized in that the defrost control method includes:在所述空调器制热运行时，获取所述空调器的吸气压力以及所述室外机的盘管温度；During the heating operation of the air conditioner, obtaining the suction pressure of the air conditioner and the coil temperature of the outdoor unit;根据所述空调器的吸气压力以及所述室外机的盘管温度，选择性地使所述空调器进入相应的室外机除霜模式。According to the suction pressure of the air conditioner and the coil temperature of the outdoor unit, the air conditioner is selectively brought into a corresponding outdoor unit defrost mode.
- 根据权利要求1所述的室外机除霜控制方法，其特征在于，“根据所述空调器的吸气压力以及所述室外机的盘管温度，选择性地使所述空调器进入相应的室外机除霜模式”的步骤具体包括：The defrosting control method for an outdoor unit according to claim 1, wherein "the air conditioner is selectively caused to enter a corresponding outdoor area according to the air intake pressure of the air conditioner and the coil temperature of the outdoor unit "Defrost mode" includes the following steps:将所述吸气压力与预设吸气压力进行比较，并且将所述盘管温度与第一预设温度和/或第二预设温度进行比较；Comparing the suction pressure with a preset suction pressure, and comparing the coil temperature with a first preset temperature and / or a second preset temperature;根据所述吸气压力与所述预设吸气压力的比较结果以及所述盘管温度与所述第一预设温度和/或所述第二预设温度的比较结果，选择性地使所述空调器进入相应的室外机除霜模式；Selectively comparing the suction pressure with the preset suction pressure and the comparison result of the coil temperature with the first preset temperature and / or the second preset temperature The air conditioner enters the corresponding outdoor unit defrost mode;其中，所述第一预设温度小于所述第二预设温度。The first preset temperature is lower than the second preset temperature.
- 根据权利要求2所述的室外机除霜控制方法，其特征在于，“根据所述吸气压力与所述预设吸气压力的比较结果以及所述盘管温度与所述第一预设温度和/或所述第二预设温度的比较结果，选择性地使所述空调器进入相应的室外机除霜模式”的步骤具体包括：The defrosting control method for an outdoor unit according to claim 2, characterized in that "based on a comparison result between said suction pressure and said preset suction pressure and said coil temperature and said first preset temperature And / or the comparison result of the second preset temperature, the step of selectively causing the air conditioner to enter a corresponding outdoor unit defrost mode "specifically includes:如果所述吸气压力大于等于所述预设吸气压力，并且所述盘管温度大于等于所述第一预设温度且小于等于所述第二预设温度，则使所述空调器进入第一除霜模式。If the suction pressure is greater than or equal to the preset suction pressure, and the coil temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the air conditioner is caused to enter the first A defrost mode.
- 根据权利要求3所述的室外机除霜控制方法，其特征在于，所述除霜控制方法还包括：The defrosting control method for an outdoor unit according to claim 3, wherein the defrosting control method further comprises:在所述空调器进入所述第一除霜模式后，如果所述室外机的盘管温度大于等于第三预设温度，则使所述空调器退出所述第一除霜模式。After the air conditioner enters the first defrost mode, if the coil temperature of the outdoor unit is greater than or equal to a third preset temperature, the air conditioner is caused to exit the first defrost mode.
- 根据权利要求3所述的室外机除霜控制方法，其特征在于，“使所述空调器进入第一除霜模式”的步骤具体包括：The defrosting control method for an outdoor unit according to claim 3, wherein the step of "making the air conditioner enter a first defrosting mode" specifically includes:在所述空调器制热运行时，将所述空调器的压缩机输出的换热介质直接引入所述室外机的换热器的进气口处。During the heating operation of the air conditioner, the heat exchange medium output from the compressor of the air conditioner is directly introduced into the air inlet of the heat exchanger of the outdoor unit.
- 根据权利要求2至5中任一项所述的室外机除霜控制方法，其特征在于，“根据所述吸气压力与所述预设吸气压力的比较结果以及所述盘管温度与所述第一预设温度和/或所述第二预设温度的比较结果，选择性地使所述空调器进入相应的室外机除霜模式”的步骤具体包括：The defrosting control method for an outdoor unit according to any one of claims 2 to 5, characterized in that "based on a comparison result between said suction pressure and said preset suction pressure and said coil temperature and The step of comparing the first preset temperature and / or the second preset temperature and selectively enabling the air conditioner to enter a corresponding outdoor unit defrost mode "specifically includes:如果所述吸气压力小于所述预设吸气压力，并且所述盘管温度小于所述第一预设温度，则使所述空调器进入第二除霜模式。If the suction pressure is less than the preset suction pressure, and the coil temperature is less than the first preset temperature, the air conditioner is caused to enter a second defrost mode.
- 根据权利要求6所述的室外机除霜控制方法，其特征在于，所述除霜控制方法还包括：The defrosting control method for an outdoor unit according to claim 6, wherein the defrosting control method further comprises:在所述空调器进入所述第二除霜模式后，如果所述室外机的盘管温度大于等于第四预设温度，则使所述空调器退出所述第二除霜模式。After the air conditioner enters the second defrost mode, if the coil temperature of the outdoor unit is greater than or equal to a fourth preset temperature, the air conditioner is caused to exit the second defrost mode.
- 根据权利要求6所述的室外机除霜控制方法，其特征在于，“使所述空调器进入第二除霜模式”的步骤具体包括：The defrosting control method for an outdoor unit according to claim 6, wherein the step of "making the air conditioner enter a second defrosting mode" specifically includes:使所述空调器的循环回路执行换热介质逆循环操作。The circulation loop of the air conditioner is caused to perform a reverse circulation operation of the heat exchange medium.
- 一种空调器，其特征在于，所述空调器包括控制装置，所述控制装置能够执行权利要求1至8中任一项所述的除霜控制方法。An air conditioner, wherein the air conditioner includes a control device capable of executing the defrosting control method according to any one of claims 1 to 8.
- 根据权利要求9所述的空调器，其特征在于，所述空调器还包括除霜热气旁通管路，The air conditioner according to claim 9, wherein the air conditioner further comprises a defrosting hot gas bypass line,所述除霜热气旁通管路用于将所述空调器的压缩机排出的换热介质引入所述室外机的换热器中。The defrost hot gas bypass line is used to introduce a heat exchange medium discharged from a compressor of the air conditioner into a heat exchanger of the outdoor unit.
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| CN107246701A (en) * | 2016-09-13 | 2017-10-13 | 奥克斯空调股份有限公司 | A kind of air conditioner chamber's external heat exchanger defrosting or snow removing control method |
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2018
- 2018-07-23 CN CN201810814256.4A patent/CN110749072A/en active Pending
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2019
- 2019-05-24 WO PCT/CN2019/088231 patent/WO2020019849A1/en active Application Filing
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| CN102519190A (en) * | 2011-12-31 | 2012-06-27 | 青岛海尔空调电子有限公司 | Air cooling unit defrosting control method and system |
| CN106958926A (en) * | 2017-05-10 | 2017-07-18 | 青岛海尔空调器有限总公司 | Air-conditioner and its defrosting control method |
| CN107289579A (en) * | 2017-05-23 | 2017-10-24 | 青岛海尔空调器有限总公司 | Air conditioner and its defrosting control method |
| CN107289578A (en) * | 2017-05-23 | 2017-10-24 | 青岛海尔空调器有限总公司 | Air conditioner and its defrosting control method |
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