Air conditioner, control method, device and equipment of air conditioner and medium

Abstract

The invention discloses an air conditioner, a control method, device and equipment thereof and a medium. The air conditioner comprises a refrigerant circulation loop, a heat dissipation branch is further arranged in the refrigerant circulation loop, the heat dissipation branch is connected to the downstream of an outdoor side heat exchanger in parallel, a refrigerant radiator and a first flow adjusting valve are arranged on the heat dissipation branch, and the first flow adjusting valve is located on the upstream of the refrigerant radiator; the method comprises the steps that if the outdoor environment temperature meets the preset high-temperature condition and the operation mode of the air conditioner is a refrigeration mode, the dew point temperature corresponding to the outdoor environment temperature and the temperature of an IPM module are obtained, and the temperature difference between the dew point temperature and the temperature of the IPM module is determined; and adjusting the opening degree of the first flow adjusting valve according to the temperature difference and a preset temperature value. During high-temperature refrigeration, judgment is carried out by combining the temperature of the IPM module and the dew point temperature, the opening degree of the first flow adjusting valve is adjusted to control the temperature and the flow entering the refrigerant radiator, and therefore the high-temperature performance and the reliability of the air conditioner are improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of air conditioners, and in particular to an air conditioner and a control method, device, equipment and medium thereof. Background Art

[0002] In the field of air conditioning technology, especially for models with a cooling capacity of 12KW and above, performance stability and reliability in high temperature environments are crucial considerations. This type of model often uses a refrigerant heat dissipation module as an effective means of cooling the mainboard, aiming to reduce the mainboard temperature by directly utilizing the heat exchange capacity of the refrigerant to ensure stable operation of the system. However, one issue that cannot be ignored is that during the direct cooling of the refrigerant by the inverter air conditioner mainboard, if the refrigerant temperature is too low, condensation may form on the surface of the heat pipe, thereby causing the risk of a short circuit on the mainboard. To avoid this hidden danger, the conventional practice is to allow the refrigerant to flow directly into the heat pipe without passing through a throttling device after flowing out of the condenser. Although this reduces the risk of condensation, it sacrifices some of the heat dissipation efficiency under extremely high temperature conditions, resulting in the mainboard module temperature being too high. Therefore, the system needs to automatically limit the maximum operating frequency of the compressor to ensure the safe operation of the overall system at the expense of sacrificing some high-temperature performance. Summary of the invention

[0003] The present invention provides an air conditioner and a control method, device, equipment and medium thereof, aiming to solve the problem that the existing air conditioner has poor heat dissipation effect of the mainboard under high temperature conditions while preventing condensation on the mainboard.

[0004] In the first aspect, an embodiment of the present invention provides an air conditioner, comprising: a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a refrigerant radiator, a first flow regulating valve and a second flow regulating valve, wherein the compressor, the reversing valve, the outdoor heat exchanger, the second flow regulating valve, the indoor heat exchanger and the reversing valve are connected in sequence to form a refrigerant circulation loop, a heat dissipation branch is also provided in the refrigerant circulation loop, the heat dissipation branch is connected in parallel downstream of the outdoor heat exchanger, the refrigerant radiator and the first flow regulating valve are arranged in the heat dissipation branch, and the first flow regulating valve is located upstream of the refrigerant radiator.

[0005] In a second aspect, the present invention further provides a method for controlling an air conditioner, which is applied to the air conditioner in the first aspect, and the method comprises:

[0006] If the outdoor ambient temperature meets the preset high temperature condition and the operation mode of the air conditioner is the cooling mode, obtaining the dew point temperature and the IPM module temperature corresponding to the outdoor ambient temperature, and determining the temperature difference between the dew point temperature and the IPM module temperature;

[0007] The opening of the first flow regulating valve is adjusted according to the temperature difference and a preset temperature value.

[0008] In a third aspect, the present invention further provides a control device for an air conditioner, comprising a unit for executing the method of the second aspect.

[0009] In a fourth aspect, an embodiment of the present invention further provides a computer device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the method of the second aspect when executing the computer program.

[0010] In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program, when executed by a processor, can implement the method of the second aspect described above.

[0011] The present invention provides an air conditioner and a control method, device, equipment and medium thereof. The air conditioner comprises: a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a refrigerant radiator, a first flow regulating valve and a second flow regulating valve, wherein the compressor, the reversing valve, the outdoor heat exchanger, the second flow regulating valve, the indoor heat exchanger and the reversing valve are sequentially connected to form a refrigerant circulation loop, a heat dissipation branch is also provided in the refrigerant circulation loop, the heat dissipation branch is connected in parallel to the downstream of the outdoor heat exchanger, the refrigerant radiator and the first flow regulating valve are arranged in the heat dissipation branch, and the first flow regulating valve is located upstream of the refrigerant radiator; the method comprises: if the outdoor ambient temperature meets the preset high temperature condition and the operation mode of the air conditioner is the cooling mode, obtaining the dew point temperature corresponding to the outdoor ambient temperature and the IPM module temperature, and determining the temperature difference between the dew point temperature and the IPM module temperature; adjusting the opening of the first flow regulating valve according to the temperature difference and the preset temperature value. During high-temperature cooling, the present application makes a judgment by combining the IPM module temperature and the dew point temperature, and adjusts the opening of the first flow control valve to control the temperature and flow entering the refrigerant radiator, thereby improving the heat dissipation capacity of the mainboard and the maximum operating frequency of the compressor under high-temperature conditions, thereby improving the high-temperature performance and reliability of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0013] Figure 1 is a schematic diagram of a refrigerant circulation circuit of an air conditioner according to an embodiment of the present invention;

[0014] Figure 2A schematic flow chart of the steps of a method for controlling an air conditioner according to an embodiment of the present invention;

[0015] Figure 3 1 is a schematic diagram of a sub-step flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0016] Figure 4 1 is a schematic diagram of a sub-step flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0017] Figure 5 1 is a schematic diagram of a sub-step flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0018] Figure 6 1 is a schematic diagram of a sub-step flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0019] Figure 7 A control logic diagram of a control method for an air conditioner according to an embodiment of the present invention;

[0020] Figure 8 A schematic block diagram of a control device for an air conditioner provided by an embodiment of the present invention;

[0021] Fig. 9 A schematic block diagram of a computer device provided in an embodiment of the present invention;

[0022] Reference numerals:

[0023] 1. Compressor; 2. Reversing valve; 3. Outdoor heat exchanger; 4. Indoor heat exchanger; 5. Refrigerant radiator; 6. First flow regulating valve; 7. Second flow regulating valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0026] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0029] In order to facilitate understanding of the present invention, the air conditioner provided by the embodiment of the present invention is first described. Figure 1 , Figure 1 The schematic diagram of the refrigerant circulation circuit of the air conditioner according to the embodiment of the present invention. The embodiment of the present invention provides an air conditioner, comprising: a compressor 1, a reversing valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 4, a refrigerant radiator 5, a first flow regulating valve 6 and a second flow regulating valve 7. The compressor 1, the reversing valve 2, the outdoor heat exchanger 3, the second flow regulating valve 7, the indoor heat exchanger 4 and the reversing valve 2 are sequentially connected to form a refrigerant circulation circuit. A heat dissipation branch is also provided in the refrigerant circulation circuit. The heat dissipation branch is connected in parallel to the downstream of the outdoor heat exchanger 3. The refrigerant radiator 5 and the first flow regulating valve 6 are provided in the heat dissipation branch. The first flow regulating valve 6 is located upstream of the refrigerant radiator 5.

[0030] Specifically, in this embodiment, the outdoor heat exchanger 3 is a condenser, the indoor heat exchanger 4 is an evaporator, the reversing valve 2 is a four-way valve, the first flow regulating valve 6 and the second flow regulating valve 7 are electronic expansion valves, and the refrigerant radiator 5 is used to dissipate heat from the main board of the air conditioner, and the refrigeration components are connected by pipelines. According to the flow direction of the refrigerant, the circulation mode of the refrigerant during refrigeration is: compressor 1-four-way valve-outdoor heat exchanger 3-first flow regulating valve 6-refrigerant radiator 5-second flow regulating valve 7-indoor heat exchanger 4-four-way valve-compressor 1. The heat dissipation branch is connected in parallel with the main circuit of the refrigerant circulation circuit, specifically in parallel on the outlet side of the condenser. The first flow regulating valve 6 and the refrigerant radiator 5 are both arranged on the heat dissipation branch, the first flow regulating valve 6 is upstream, and the refrigerant radiator 5 is downstream. As a result, the refrigerant is divided into two parallel paths after coming out of the condenser, one path passes through the first flow regulating valve 6 to enter the refrigerant radiator 5, and then returns to the second flow regulating valve 7, and the other path is directly connected to the second flow regulating valve 7. After the refrigerant comes out of the condenser, it is adjusted by the first flow regulating valve 6 and then enters the refrigerant radiator 5. Then, by adjusting the opening of the first flow regulating valve 6, the temperature and flow of the refrigerant entering the refrigerant radiator 5 can be controlled, thereby adjusting the heat dissipation capacity of the refrigerant radiator 5, and then ensuring good heat dissipation of the mainboard. Specifically, under high temperature conditions, the heat dissipation effect of the mainboard is poor. At this time, the opening of the first flow regulating valve 6 is reduced, so that the temperature of the refrigerant entering the refrigerant radiator 5 is reduced, the heat dissipation capacity of the refrigerant radiator 5 is improved, and thus the heat dissipation efficiency of the mainboard is improved.

[0031] Through this embodiment, during high-temperature cooling, the temperature and flow rate entering the refrigerant radiator 5 can be controlled by adjusting the opening of the first flow regulating valve 6, thereby improving the heat dissipation capacity of the main board under high temperature conditions, avoiding the frequency limitation of the compressor 1 when the temperature of the main board is too high, increasing the maximum operating frequency of the compressor 1, and improving the high-temperature performance and reliability.

[0032] See also Figure 2 , Figure 2 The flowchart of the control method of the air conditioner provided in the embodiment of the present invention. The air conditioner applied to the above embodiment has been described in detail in the above embodiment. For the sake of brevity of the specification, it will not be repeated here. The control method of the air conditioner is described in detail below. Figure 2 As shown, the method includes the following steps: S110-S120.

[0033] S110, if the outdoor ambient temperature meets the preset high temperature condition and the operation mode of the air conditioner is the cooling mode, obtaining the dew point temperature and the IPM module temperature corresponding to the outdoor ambient temperature, and determining the temperature difference between the dew point temperature and the IPM module temperature;

[0034] S120. Adjust the opening of the first flow regulating valve according to the temperature difference and a preset temperature value.

[0035] In this embodiment, the air conditioner will first obtain the outdoor ambient temperature after starting up, and the outdoor ambient temperature can be obtained through the temperature sensing package of the outdoor unit. Then, according to the outdoor ambient temperature, it is determined what kind of preset temperature condition is currently in, including preset high temperature condition, preset normal temperature condition and preset low temperature condition. The preset high temperature condition can be, for example, greater than or equal to 30°C, and the control actions performed under different temperature conditions are different. If the current temperature condition is the preset high temperature condition, then the current operating mode of the air conditioner is then determined, which generally includes cooling mode and heating mode. If it is in heating mode, the outdoor ambient temperature is too high and the air conditioner cannot be turned on. If the temperature is in the range where it can be turned on, it means that the outdoor ambient temperature is below 40°C. After the air conditioner is running, the indoor ambient temperature will quickly reach the set temperature and shut down, so the second flow control valve is fully opened to ensure the reliability of the mainboard. If it is in cooling mode, first obtain the dew point temperature corresponding to the outdoor ambient temperature and the IPM module temperature.

[0036] Dew point temperature refers to the temperature when the air is cooled to a saturated state when the water vapor content and air pressure remain unchanged. In simple terms, it is the temperature at which water vapor in the air begins to condense into dew or frost. When the surface temperature of an object is lower than the dew point temperature of the surrounding air, the water vapor in the air will condense into water droplets on the surface, thereby producing condensation. Different outdoor ambient temperatures correspond to different dew point temperatures. The dew point temperature is obtained by first obtaining the outdoor ambient temperature, querying the database preset in the mainboard program, querying the range of dew point temperatures, and selecting the highest value of the dew point temperature range when calculating. Because the dew point temperature is different under different air humidity conditions for the same outdoor ambient temperature, and there is no humidity sensor outdoors, the dew point temperature queried is a range. In order to avoid condensation, the highest dew point temperature is usually selected for calculation.

[0037] IPM (Intelligent Power Module) is an important component in the air conditioning system. The IPM module integrates multiple power semiconductor devices and drive circuits to control and convert electricity to meet the needs of the air conditioning compressor and other loads. The IPM module is set on the mainboard. The IPM module has its own temperature sensor to detect the temperature of the IPM module. The IPM module is the main heat source of the mainboard. The temperature rise of the mainboard can be determined by the height of the IPM module.

[0038] At present, in order to prevent condensation of the mainboard, the refrigerant enters the refrigerant heat pipe directly without throttling after coming out of the condenser. When the temperature of the mainboard is too high under outdoor high temperature conditions, the maximum operating frequency of the compressor will be limited, reducing the high temperature performance. In order to reduce the temperature of the mainboard under the premise of preventing condensation of the mainboard, this embodiment controls the temperature and flow entering the refrigerant radiator by the difference between the IPM module temperature and the dew point temperature, so as to improve the heat dissipation capacity of the mainboard, the compressor frequency and the reliability of the mainboard under high temperature conditions. Specifically, after obtaining the dew point temperature and the IPM module temperature, the difference between the two is calculated to obtain the temperature difference. It can be understood that the temperature difference is combined with the dew point temperature, so in the subsequent adjustment, it can be ensured that the refrigerant radiator will not drop to the dew point temperature to cause condensation on the mainboard, and prevent the mainboard of the variable frequency air conditioner from condensing under the cooling of the refrigerant radiator and causing the mainboard short circuit problem. The temperature difference can be used to know the current temperature rise of the mainboard. The larger the temperature difference, the greater the temperature rise of the mainboard and the poor heat dissipation effect. The opening of the first flow regulating valve is adjusted according to the temperature difference and the preset temperature value. Changing the opening of the first flow regulating valve can change the temperature of the refrigerant entering the refrigerant radiator. When the opening is reduced, the pressure of the refrigerant is reduced, and the temperature of the refrigerant is reduced through the Joule-Thomson effect and the change of enthalpy value, thereby reducing the temperature of the refrigerant entering the refrigerant radiator, thereby improving the heat dissipation effect of the mainboard.

[0039] Through this embodiment, during high-temperature cooling, the temperature and flow rate entering the refrigerant radiator are controlled by the difference between the IPM module temperature and the dew point temperature and the preset temperature value, thereby improving the heat dissipation capacity of the mainboard, the compressor frequency and the reliability of the mainboard under high temperature conditions, effectively reducing the mainboard temperature while preventing condensation on the mainboard, increasing the maximum operating frequency, and improving high-temperature performance.

[0040] In one embodiment, if Figure 3 As shown, the step S120 includes: S121-S122.

[0041] S121, determining whether the temperature difference is greater than or equal to a first preset temperature value;

[0042] S122: If the temperature difference is greater than or equal to a first preset temperature value, control the first flow regulating valve to reduce its opening degree at a first action speed.

[0043] In this embodiment, the IPM module temperature is T IPM , dew point temperature is T 露 , the temperature difference is ΔT, the first preset temperature value is T1, the range of T1 can be 20℃~50℃, ΔT=T IPM -T 露. If ΔT≥T1, it means that the heat dissipation effect of the mainboard is poor at this time or the heat generated by the mainboard during high power is large, resulting in a high temperature rise of the mainboard. In order to prevent the components of the mainboard from burning and to prevent the compressor from triggering the frequency reduction protection due to excessive temperature rise of the mainboard, thereby reducing the refrigeration effect, the heat dissipation effect of the refrigerant must be increased. By reducing the opening of the first flow regulating valve, there is a certain throttling effect on the refrigerant, and the heat exchange effect is improved by reducing the temperature of the refrigerant entering the mainboard radiator. When reducing the opening of the first flow regulating valve, the first flow regulating valve is reduced according to the first action speed, and the first action speed can be selected from 5 steps / s to 10 steps / s. Through this embodiment, the heat dissipation capacity of the mainboard under high temperature conditions is improved to increase the compressor frequency and the reliability of the mainboard, thereby improving the performance of the air conditioner under high temperature conditions.

[0044] In one embodiment, if Figure 4 As shown, the step S122 also includes: S123-S124.

[0045] S123, obtaining the temperature drop rate of the IPM module, and determining whether the temperature drop rate is less than a preset temperature drop rate threshold;

[0046] S124: If the temperature drop rate is less than a preset temperature drop rate threshold, control the first flow control valve to reduce its opening degree at a second action speed, wherein the second action speed is less than the first action speed.

[0047] In this embodiment, the temperature drop rate is V 降 The temperature of the first flow control valve at the initial time of temperature drop is T0, and the temperature after 20 seconds is T 20 , then V 降 =(T 20 -T0) / T0. The preset temperature drop rate threshold is V 阈 The preset temperature drop rate threshold is the alarm value of the temperature drop rate, which can range from 0.32 to 0.21. If it is lower than this value, it means that the temperature drop rate is too fast. If the temperature drop rate is too fast, it is easy to cause over-regulation and cause condensation on the motherboard. Therefore, the temperature drop rate and temperature drop effect of the motherboard should be controlled within a reasonable range. Specifically, this embodiment determines the comparison V 降 and V 阈 , if V 降 <V 阈 , indicating that the temperature drops too fast at this time, and there is a risk of condensation on the mainboard, and the temperature drop speed needs to be slowed down. By controlling the first flow control valve to reduce the opening according to the second action speed, the opening of the first flow control valve is slowly reduced, and the second action speed is less than the speed at which the first action speed is reduced. The second action speed can be selected from: 1 step / s to 3 steps / s. Through this embodiment, by slowly reducing the opening of the first flow control valve, over-regulation and condensation on the mainboard are prevented, thereby improving reliability.

[0048] In one embodiment, as Figure 5 shown, step S120 further includes: S125 - S126.

[0049] S125. Determine whether the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value, where the second preset temperature value is less than the first preset temperature value;

[0050] S126. If the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value, control the first flow regulating valve to maintain its current opening degree.

[0051] In this embodiment, the second preset temperature value is T2, and the range of T2 can be 10°C to 20°C. If the case of ΔT≥T1 is false, continue with the next-level temperature judgment to determine T2≤ΔT<T1. If true, it indicates that the temperature rise of the main board is not high at this time. Whether it is the temperature drop effect or the heat generation of the components, it remains in a relatively good heat exchange state. There is no need to adjust the state of the first flow regulating valve, and the previous state can be maintained. Therefore, control the first flow regulating valve to maintain its current opening degree.

[0052] In one embodiment, as Figure 6 shown, step S120 further includes: S127 - S128.

[0053] S127. Determine whether the temperature difference is less than the second preset temperature value;

[0054] S128. If the temperature difference is less than the second preset temperature value, adjust the opening degree of the first flow regulating valve to the maximum.

[0055] In this embodiment, if the case of T2≤ΔT<T1 is false, continue with the next-level temperature judgment to determine ΔT<T2. If true, it indicates that the temperature rise of the main board is relatively low at this time. To prevent the main board from condensing, it is necessary to fully open the first flow regulating valve, which is equivalent to the refrigerant directly entering the refrigerant radiator without throttling. In this case, the refrigerant temperature is relatively high, so it is possible to avoid further condensation of the main board temperature and avoid affecting the reliability of the main board.

[0056] In other embodiments, the control method of the air conditioner further includes: if the outdoor ambient temperature meets the preset normal temperature condition and the operating mode of the air conditioner is the cooling mode, adjust the opening degree of the first flow regulating valve to the maximum.

[0057] Specifically, after the air conditioner is turned on, it will first obtain the outdoor ambient temperature, and then determine the current preset temperature condition based on the outdoor ambient temperature, including preset high temperature conditions, preset normal temperature conditions and preset low temperature conditions. The preset normal temperature condition can be 20℃-30℃, and the control actions performed under different temperature conditions are different. If the current temperature condition is the preset normal temperature condition, then the current operation mode of the air conditioner is determined, which generally includes cooling mode and heating mode. If it is in cooling mode, the opening of the first flow regulating valve is controlled to be adjusted to the maximum, that is, the first flow regulating valve is fully opened, and the second flow regulating valve is automatically adjusted according to the exhaust temperature; if it is in heating mode, the opening of the second flow regulating valve is controlled to be adjusted to the maximum, that is, the second flow regulating valve is fully opened, and the first flow regulating valve is automatically adjusted according to the exhaust temperature. At this time, it means that the ambient temperature is medium, and the refrigerant coming out of the condenser does not need to be throttled and flows directly through the main board, and the temperature drop effect will also be better. Therefore, in order to prevent condensation on the main board, the temperature of the refrigerant entering the main board is kept higher than the ambient temperature.

[0058] In other embodiments, the control method of the air conditioner further includes: if the outdoor ambient temperature meets a preset low temperature condition, controlling the first flow regulating valve to close.

[0059] Specifically, after the air conditioner is turned on and operated, it will first obtain the outdoor ambient temperature, and then determine what preset temperature condition it is currently in according to the outdoor ambient temperature, including preset high temperature conditions, preset normal temperature conditions and preset low temperature conditions. The preset low temperature condition can be below 20°C, and the control actions performed under different temperature conditions are different. Under outdoor low temperature conditions, the outdoor condenser has strong heat exchange, and the temperature of the refrigerant coming out is low. The low temperature refrigerant passes through the main board, which will produce condensation water on the main board, and the temperature of the main board components is too low to affect reliability. Moreover, under outdoor low temperature conditions, the refrigerant after cooling the condenser passes through the main board and will be heated by the main board, resulting in an increase in the temperature of the refrigerant and reduced performance. In order to avoid this situation, the first flow regulating valve is closed in this embodiment, that is, the first flow regulating valve is powered off, and the first flow regulating valve is in a normally closed state when the power is off. In this way, the refrigerant cannot pass through the refrigerant radiator. By cutting off the refrigerant in the refrigerant radiator, the temperature of the main board is increased within a reasonable range by adopting a natural heat exchange method, and the condensation of the main board and the low temperature of the main board are prevented to affect reliability. In addition, by cutting off the refrigerant in the refrigerant radiator, the refrigerant does not pass through the mainboard and will not be affected by the high temperature of the mainboard, which can maintain a lower cold outlet temperature and improve the heat exchange performance

[0060] Reference Figure 7 In order to further illustrate the control method of the air conditioner of this embodiment, the control logic of the specific working process of the air conditioner is used for explanation below, which is as follows.

[0061] First, obtain the outdoor ambient temperature T 设, then determine whether the outdoor environment is high temperature, normal temperature or low temperature.

[0062] If T 设 ≥ 30°C, it indicates that the current condition is high temperature. Obtain the operating mode of the air conditioner. If the operating mode is the heating mode, control the second flow regulating valve to be fully open. If the operating mode is the cooling mode, calculate the temperature difference ΔT between the IPM module temperature and the dew point temperature. First, determine whether ΔT ≥ T1. If so, quickly reduce the opening degree of the first flow regulating valve. Then, to avoid over-regulation, obtain the temperature drop rate V 降 of the first flow regulating valve, and determine whether V 降 < V 阈 . If so, slowly reduce the opening degree of the first flow regulating valve to avoid over-regulation. If ΔT ≥ T1 is false, continue to determine whether T2 ≤ ΔT < T1. If so, keep the opening degree of the first flow regulating valve unchanged. If T2 ≤ ΔT < T1 is false, continue to determine whether ΔT < T2. If so, control the first flow regulating valve to be fully open.

[0063] If 20°C ≤ T 设 < 30°C, it indicates that the current condition is normal temperature. Then, when the operating mode is cooling, the first flow regulating valve is fully open; when the operating mode is heating, the second flow regulating valve is fully open.

[0064] If T 设 < 20°C, it indicates that the current condition is low temperature. Cut off the power supply of the first flow regulating valve to make it in the normally closed state.

[0065] In summary, through this embodiment, according to the outdoor environmental temperature, the dew point temperature is judged, and combined with the operating mode of the air conditioner and the IPM module temperature of the main board, the temperature and flow rate of the refrigerant entering the main board refrigerant radiator are adjusted. During low-temperature heating and low-temperature cooling, the heat exchange effect of the two heat exchangers and the reliability of the main board are improved by cutting off the refrigerant in the refrigerant heat dissipation plate, thereby improving the performance. During high-temperature cooling, the temperature and flow rate of the refrigerant entering the main board refrigerant radiator are controlled by the difference between the IPM module temperature and the dew point temperature and the temperature drop rate of the IPM module temperature, so as to improve the heat dissipation capacity of the main board, the compressor frequency and the reliability of the main board under high-temperature conditions.

[0066] Figure 8 is a schematic block diagram of a control device 200 of an air conditioner provided by an embodiment of the present invention. As Figure 8 shown, corresponding to the above control method of the air conditioner, the present invention also provides a control device 200 of an air conditioner. The control device 200 of the air conditioner includes a unit for executing the above control method of the air conditioner, and this device can be configured in a computer device. Specifically, please refer to Figure 8 , the control device 200 of the air conditioner includes: an acquisition unit 201 and an adjustment unit 202.

[0067] Among them, the acquisition unit 201 is used to obtain the dew point temperature and the IPM module temperature corresponding to the outdoor ambient temperature if the outdoor ambient temperature meets the preset high temperature condition and the operating mode of the air conditioner is the cooling mode, and determine the temperature difference between the dew point temperature and the IPM module temperature; the adjustment unit 202 is used to adjust the opening of the first flow control valve according to the temperature difference and the preset temperature value.

[0068] In one embodiment, the adjusting unit 202 includes: a first judging unit and a fast reducing unit.

[0069] Among them, the first judgment unit is used to judge whether the temperature difference is greater than or equal to the first preset temperature value; the rapid reduction unit is used to control the first flow control valve to reduce the opening according to the first action speed if the temperature difference is greater than or equal to the first preset temperature value.

[0070] In one embodiment, the adjusting unit 202 further includes: a second determining unit and a slow reducing unit.

[0071] Among them, the second judgment unit is used to obtain the temperature drop rate of the IPM module and judge whether the temperature drop rate is less than the preset temperature drop rate threshold; the slow reduction unit is used to control the first flow control valve to reduce the opening according to the second action speed if the temperature drop rate is less than the preset temperature drop rate threshold, wherein the second action speed is less than the first action speed.

[0072] In one embodiment, the adjusting unit 202 further includes: a third judging unit and a holding unit.

[0073] Among them, the third judgment unit is used to judge whether the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value, wherein the second preset temperature value is less than the first preset temperature value; the maintaining unit is used to control the first flow regulating valve to maintain the current opening if the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value.

[0074] In one embodiment, the adjustment unit 202 further includes: a fourth determination unit and a full-open unit.

[0075] Among them, the fourth judgment unit is used to judge whether the temperature difference is less than the second preset temperature value; the full-opening unit is used to adjust the opening of the first flow control valve to the maximum if the temperature difference is less than the second preset temperature value.

[0076] In one embodiment, the control device 200 of the air conditioner further includes: a second full-opening unit and a closing unit.

[0077] Among them, the second fully-open unit is used to adjust the opening of the first flow regulating valve to the maximum if the outdoor ambient temperature meets the preset normal temperature condition and the operating mode of the air conditioner is the cooling mode; the closing unit is used to control the first flow regulating valve to close if the outdoor ambient temperature meets the preset low temperature condition.

[0078] The control device 200 of the air conditioner can be implemented in the form of a computer program. Fig. 9 Runs on the computer device shown.

[0079] See also Fig. 9 , Fig. 9 5 is a schematic block diagram of a computer device provided in an embodiment of the present application. The computer device 500 may be a terminal.

[0080] See also Fig. 9 The computer device 500 includes a processor 502 , a memory and a network interface 505 connected via a system bus 501 , wherein the memory may include a non-volatile storage medium 503 and an internal memory 504 .

[0081] The non-volatile storage medium 503 can store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions, and when the program instructions are executed, the processor 502 can execute a method for controlling an air conditioner.

[0082] The processor 502 is used to provide computing and control capabilities to support the operation of the entire computer device 500 .

[0083] The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can execute a method for controlling an air conditioner.

[0084] The network interface 505 is used to communicate with other devices over the network. Fig. 9 The structure shown in the figure is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device 500 to which the solution of the present application is applied. The specific computer device 500 may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0085] The processor 502 is used to run a computer program 5032 stored in the memory to implement the steps of the above method.

[0086] It should be understood that in the embodiment of the present application, the processor 502 may be a central processing unit (CPU), and the processor 502 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0087] It can be understood by those skilled in the art that all or part of the processes in the method for implementing the above embodiment can be completed by instructing the relevant hardware through a computer program. The computer program includes program instructions, and the computer program can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiment of the above method.

[0088] Therefore, the present invention also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a processor, the processor executes the steps of the above method.

[0089] The storage medium may be a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk, etc., which are computer-readable storage media that can store program codes.

[0090] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0091] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0092] The steps in the method of the embodiment of the present invention can be adjusted in order, combined and deleted according to actual needs. The units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0093] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device to perform all or part of the steps of the method described in each embodiment of the present invention.

[0094] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0095] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0096] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An air conditioner, characterized in that: include: A compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a refrigerant radiator, a first flow regulating valve and a second flow regulating valve. The compressor, the reversing valve, the outdoor heat exchanger, the second flow regulating valve, the indoor heat exchanger and the reversing valve are connected in sequence to form a refrigerant circulation loop. A heat dissipation branch is also provided in the refrigerant circulation loop. The heat dissipation branch is connected in parallel to the downstream of the outdoor heat exchanger. The refrigerant radiator and the first flow regulating valve are arranged in the heat dissipation branch. The first flow regulating valve is located upstream of the refrigerant radiator.

2. A method for controlling an air conditioner, characterized in that: Applied to the air conditioner of claim 1, the method comprises: If the outdoor ambient temperature meets the preset high temperature condition and the operation mode of the air conditioner is the cooling mode, obtaining the dew point temperature and the IPM module temperature corresponding to the outdoor ambient temperature, and determining the temperature difference between the dew point temperature and the IPM module temperature; The opening of the first flow regulating valve is adjusted according to the temperature difference and a preset temperature value.

3. The method according to claim 2, characterized in that The step of adjusting the opening of the first flow regulating valve according to the temperature difference and the preset temperature value comprises: Determining whether the temperature difference is greater than or equal to a first preset temperature value; If the temperature difference is greater than or equal to a first preset temperature value, the first flow regulating valve is controlled to reduce its opening degree at a first action speed.

4. The method according to claim 3, characterized in that: After the step of controlling the first flow regulating valve to reduce the opening degree according to the first action speed, the method further includes: Obtaining the temperature drop rate of the IPM module, and determining whether the temperature drop rate is less than a preset temperature drop rate threshold; If the temperature drop rate is less than a preset temperature drop rate threshold, the first flow control valve is controlled to reduce the opening degree at a second action speed, wherein the second action speed is less than the first action speed.

5. The method according to claim 3, characterized in that: The step of adjusting the opening of the first flow regulating valve according to the temperature difference and the preset temperature value further includes: Determining whether the temperature difference is less than the first preset temperature value and greater than or equal to a second preset temperature value, wherein the second preset temperature value is less than the first preset temperature value; If the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value, the first flow regulating valve is controlled to maintain a current opening.

6. The method according to claim 5, characterized in that The step of adjusting the opening of the first flow regulating valve according to the temperature difference and the preset temperature value further includes: Determining whether the temperature difference is less than the second preset temperature value; If the temperature difference is less than the second preset temperature value, the opening of the first flow regulating valve is adjusted to the maximum.

7. The method according to claim 2, characterized in that The method further comprises: If the outdoor ambient temperature meets the preset normal temperature condition and the operation mode of the air conditioner is the cooling mode, the opening of the first flow regulating valve is adjusted to the maximum; and / or, If the outdoor ambient temperature meets the preset low temperature condition, the first flow regulating valve is controlled to close.

8. A control device for an air conditioner, characterized in that: The apparatus comprises means for executing the method according to any one of claims 2 to 7 above.

9. A computer device, characterized in that: The computer device comprises a memory and a processor, the memory stores a computer program, and the processor implements the method according to any one of claims 2 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 2 to 7 can be implemented.

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