An air conditioner

Abstract

This invention relates to an air conditioner, comprising an indoor unit, an outdoor unit, a shut-off valve located between the two, a detection module, and a control module. The detection module detects the leakage parameters of the shut-off valve. The control module controls the air conditioner according to a first target frequency during initial power-on and according to a target frequency during subsequent power-on cycles. It also outputs a shut-off valve leakage signal when the leakage parameters meet the leakage conditions. The first target frequency is a frequency lower than the target frequency. This invention only limits the compressor frequency during initial power-on and determines whether the shut-off valve is leaking. If no leaking issue is detected, it does not affect the normal operation of the unit. Simultaneously, when a leaking issue is detected, a shut-off valve leakage signal is output for corresponding protective control, maximizing compressor protection. During subsequent power-on cycles, normal frequency control of the compressor achieves rapid cooling.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner with a shut-off valve leakage protection function. Background Art

[0002] When installing the air conditioner, the installation skills of the installers vary, and some installers may miss opening the stop valve. Some air conditioners are not equipped with a pressure switch. Once the stop valve is missed, effective protection cannot be provided, the compressor will be evacuated, and the cylinder temperature will rise rapidly. Since the materials of the various components inside the compressor are different and the expansion coefficients are also different, the piston expands due to heat, and the gap between the upper and lower end covers of the cylinder becomes smaller or even contacts, causing wear and even cylinder jamming, which can easily cause damage to the compressor.

[0003] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The invention provides an air conditioner, which solves the technical problem in the prior art that a stop valve is not opened during installation of the air conditioner, resulting in damage to the compressor.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] An air conditioner comprises an indoor unit, an outdoor unit and a stop valve located therebetween, and the air conditioner further comprises:

[0007] A detection module, used for detecting the leakage opening parameter of the stop valve;

[0008] A control module, used for calculating a target frequency of the compressor according to an indoor ambient temperature and a set temperature;

[0009] The control module is further used to control the compressor according to the first target frequency when the air conditioner is powered on for the first time, so that the actual operating frequency of the compressor reaches the first target frequency; when the air conditioner is not powered on for the first time, the compressor is controlled according to the target frequency, so that the actual operating frequency of the compressor reaches the target frequency;

[0010] The control module is also used to output a stop valve leakage opening signal when the leakage opening parameter of the stop valve meets the leakage opening condition;

[0011] Wherein, the first target frequency is a frequency lower than the target frequency. The first target frequency < the target frequency, or the first target frequency ≤ the target frequency.

[0012] When the compressor is powered on for the first time, it is controlled at a first target frequency lower than the target frequency, and it is determined whether the stop valve is leaked. If there is no problem of leaking the stop valve, it will not affect the normal use of the subsequent units. At the same time, when it is detected that the stop valve is leaked, a stop valve leak signal is output to protect the compressor to the greatest extent. When it is not powered on for the first time, the compressor is controlled at the target frequency to achieve a rapid cooling effect.

[0013] In some embodiments of the present application, the first target frequency is the product of the target frequency and the frequency limiting factor, wherein the frequency limiting factor ∈ (0, 1]; the frequency limiting factor is negatively correlated with the outdoor ambient temperature and positively correlated with the outdoor ambient temperature adjustment value, and the outdoor ambient temperature adjustment value is negatively correlated with the target frequency or the interval to which the target frequency belongs. The higher the outdoor ambient temperature, the smaller the frequency limiting factor, the lower the outdoor ambient temperature, and the larger the frequency limiting factor; the larger the target frequency or the larger the interval to which the target frequency belongs, the smaller the outdoor environment adjustment value, the smaller the target frequency or the smaller the interval to which the target frequency belongs, the larger the outdoor environment adjustment value; the larger the outdoor ambient temperature adjustment value, the larger the frequency limiting factor, the smaller the outdoor ambient temperature adjustment value, and the larger the frequency limiting factor. Differentiating the first target frequency according to the target frequency, the outdoor ambient temperature, and the outdoor ambient temperature adjustment value can reduce the adverse effects on the compressor when the shut-off valve is missed, and at the same time, make the first target frequency as close to the target frequency as possible to ensure the cooling effect.

[0014] In some embodiments of the present application, the frequency limiting factor is equal to the difference between 1 and T1, where T1 is the difference between the outdoor ambient temperature and the outdoor ambient temperature adjustment value / 100. Frequency limiting factor=1-(the difference between the outdoor ambient temperature and the outdoor ambient temperature adjustment value) / 100.

[0015] In some embodiments of the present application, the control module is used to control the compressor according to a set frequency after the stop valve leakage parameter meets the leakage condition, so that the actual operating frequency of the compressor is reduced to the set frequency, and output a stop valve leakage signal when the stop valve leakage parameter still meets the leakage condition, and the set frequency is a frequency lower than the first target frequency, the set frequency < the first target frequency, or the set frequency ≤ the first target frequency. The actual operating frequency of the compressor is reduced to a lower set frequency. If the leakage condition is still met when running at this frequency, the stop valve leakage is further determined to ensure that the output stop valve leakage signal is accurate and no false alarm occurs.

[0016] In some embodiments of the present application, the control module is used to control the compressor according to a set frequency after the stop valve leakage parameter meets the leakage condition for a first set time, so that the actual operating frequency of the compressor drops to the set frequency, and output a stop valve leakage signal when the stop valve leakage parameter still meets the leakage condition, and the set frequency is a frequency lower than the first target frequency, the set frequency < the first target frequency, or the set frequency ≤ the first target frequency. When the stop valve leakage parameter meets the leakage condition for the first set time as a judgment condition, the stop valve leakage can be further determined to ensure that the output stop valve leakage signal is accurate and no false alarm occurs.

[0017] In some embodiments of the present application, the control module is used to control the compressor according to the target frequency after the shut-off valve leakage opening parameter does not meet the leakage opening condition and lasts for a second set time, that is, to control the compressor to enter normal frequency control. This can ensure that the normal control program is entered when the shut-off valve is opened.

[0018] In some embodiments of the present application, the detection module includes:

[0019] An operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0020] Indoor environment temperature detection module, used to detect indoor environment temperature;

[0021] Indoor coil temperature detection module, used to detect indoor coil temperature;

[0022] The whole machine current detection module is used to detect the whole machine current;

[0023] The leakage opening condition is to meet the following three conditions at the same time:

[0024] Condition 1: The operating mode of the air conditioner is cooling mode;

[0025] Condition 2: The difference between the indoor ambient temperature and the indoor coil temperature is within a set range;

[0026] Condition 3: The whole machine current is below the set current. The whole machine current being below the set current specifically means: the whole machine current ≤ the set current, or the whole machine current < the set current.

[0027] The setting range and the setting current are determined in advance through experiments. Through the above leakage opening parameters and leakage opening conditions, it can be accurately judged whether the stop valve is leaking.

[0028] In some embodiments of the present application, the set current is determined in advance through experiments, is generally related to the machine model, and the set current is positively correlated with the capacity of the unit.

[0029] In some embodiments of the present application, the control module is used to calculate the target opening of the electronic expansion valve;

[0030] The control module is also used to control the electronic expansion valve according to the first target opening when the air conditioner is powered on for the first time, so that the actual opening of the electronic expansion valve reaches the first target opening; when the air conditioner is not powered on for the first time, the electronic expansion valve is controlled according to the target opening so that the actual opening of the electronic expansion valve reaches the target opening; wherein the first target opening is an opening higher than the target opening. When the air conditioner is powered on for the first time, the opening of the electronic expansion is higher than the target opening, which can prevent the compressor exhaust temperature from rising rapidly due to the excessively small opening of the electronic expansion valve in the state of missing the shut-off valve or the state of insufficient refrigerant, resulting in overheating and damage to the compressor cylinder.

[0031] In some embodiments of the present application, the first target opening is the product of the target opening and the opening limit factor, wherein the opening limit factor ∈ (1, 2); the opening limit factor is positively correlated with the outdoor ambient temperature and the outdoor ambient temperature adjustment value, and the outdoor ambient temperature adjustment value is negatively correlated with the target opening or the target opening interval. The higher the outdoor ambient temperature, the larger the opening limit factor, the lower the outdoor ambient temperature, and the smaller the opening limit factor; the larger the target frequency or the larger the interval to which the target frequency belongs, the smaller the outdoor environment adjustment value, the smaller the target frequency or the smaller the interval to which the target frequency belongs, the larger the outdoor environment adjustment value; the larger the outdoor ambient temperature adjustment value, the larger the opening limit factor, the smaller the outdoor ambient temperature adjustment value, and the larger the opening limit factor. Differentiating the first target opening according to the target opening, the outdoor ambient temperature, and the outdoor ambient temperature adjustment value can reduce the adverse effects on the compressor when the shut-off valve is missed, and at the same time, make the first target opening as close to the target opening as possible to ensure the cooling effect.

[0032] In some embodiments of the present application, the opening limit factor is equal to the sum of 1 and T2, where T2 is the sum of the outdoor ambient temperature and the outdoor ambient temperature adjustment value / 100. The opening limit factor=1+(outdoor ambient temperature+outdoor ambient temperature adjustment value) / 100.

[0033] In some embodiments of the present application, the detection module includes:

[0034] An operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0035] Indoor environment temperature detection module, used to detect indoor environment temperature;

[0036] Indoor coil temperature detection module, used to detect indoor coil temperature;

[0037] The whole machine current detection module is used to detect the whole machine current;

[0038] An electronic expansion valve opening detection module is used to detect the opening of the electronic expansion valve;

[0039] The leakage opening condition is to meet the following three conditions at the same time:

[0040] Condition 1: The operating mode of the air conditioner is cooling mode;

[0041] Condition 2: The difference between the indoor ambient temperature and the indoor coil temperature is within a set range;

[0042] Condition 3: The whole machine current is below the set current; or, the electronic expansion valve opening is above the set opening. The whole machine current is below the set current, specifically: whole machine current ≤ set current or whole machine current < set current, and the electronic expansion valve opening is above the set opening, specifically: electronic expansion valve opening ≥ set opening or electronic expansion valve opening > set opening.

[0043] Among them, the setting range and the setting opening are determined in advance, and whether the stop valve is leaking open can be accurately judged through the above leaking opening parameters and leaking opening conditions.

[0044] In some embodiments of the present application, the set opening is calculated by a formula. The formula for setting the opening is determined in advance through experiments and is generally related to the machine model. The set opening is positively correlated with the outdoor ambient temperature. The set opening = a + (outdoor ambient temperature - b) × c, where coefficients a, b, and c are determined in advance through experiments.

[0045] In some embodiments of the present application, the shut-off valve leakage signal output by the control module is used to control an alarm and / or control the air conditioner to shut down.

[0046] In some embodiments of the present application, the air conditioner further comprises:

[0047] A flag storage module, used for storing the first power-on flag information of the air conditioner;

[0048] The control module is used to modify the information stored in the flag storage module to non-first power-on flag information after the air conditioner is powered on for the first time. By setting the flag storage module, it is possible to accurately determine whether the air conditioner is powered on for the first time, perform frequency limiting control at the first power-on, and detect whether the air conditioner has a problem of missing the shut-off valve.

[0049] In some embodiments of the present application, the control module is used to modify the information stored in the flag storage module to non-first power-on flag information when the air conditioner is powered on and the shut-off valve leakage opening parameter does not meet the leakage opening condition. The control module is used to control the compressor according to the first target frequency when the flag storage module stores the first power-on flag information, so that the actual operating frequency of the compressor reaches the first target frequency. When the flag storage module stores the non-first power-on flag information, the compressor is controlled according to the target frequency so that the actual operating frequency of the compressor reaches the target frequency. Only when the flag storage module stores the non-first power-on flag information, the compressor is controlled at normal frequency to fully ensure that the shut-off valve is opened.

[0050] The technical solution of the present invention has the following technical effects relative to the prior art: the air conditioner of the present invention comprises an indoor unit, an outdoor unit and a stop valve located between the two, and the air conditioner also comprises a detection module and a control module, wherein the detection module is used to detect the leakage opening parameter of the stop valve; the control module is used to calculate the target frequency of the compressor, and is used to control the compressor according to the first target frequency when the air conditioner is powered on for the first time, and to control the compressor according to the target frequency when the air conditioner is not powered on for the first time; the control module is also used to output a stop valve leakage opening signal when the leakage opening parameter of the stop valve meets the leakage opening condition, wherein the first target frequency is a frequency lower than the target frequency. The air conditioner of the present invention only performs frequency limiting control on the compressor when it is powered on for the first time, and determines whether the stop valve is leaked. If there is no problem of leaking the stop valve, the normal use of the subsequent units is not affected; at the same time, when the problem of leaking the stop valve is detected, the stop valve leakage opening signal is output to perform corresponding protection control to protect the compressor to the greatest extent, and when it is not powered on for the first time, the compressor is controlled at normal frequency to achieve a rapid cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] 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 only 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 creative work.

[0052] Figure 1 It is a schematic diagram of the refrigerant circulation of the air conditioner according to a specific embodiment of the present invention.

[0053] Figure 2-7 It is a principle block diagram of an air conditioner according to a specific embodiment of the present invention.

[0054] Figure 8-11 It is a flow chart of an air conditioner according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0061] In the present application, the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, a throttling device and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool the indoor space.

[0062] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0063] The throttling device expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the throttling device and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0064] The outdoor unit of the air conditioner includes a compressor and an outdoor heat exchanger, the indoor unit includes an indoor heat exchanger, and the throttling device may be provided in the indoor unit or the outdoor unit.

[0065] When the air conditioner is used as a cooler in the cooling state, the indoor heat exchanger is used as an evaporator.

[0066] A stop valve is installed between the refrigerant circulation pipelines of the outdoor unit and the indoor unit. When the air conditioner is installed, the stop valve is in a closed state. After the air conditioner is installed, the installer needs to manually open the stop valve to ensure the smooth circulation of the refrigerant. However, there is a risk that the installer will miss the stop valve during installation. Therefore, after the air conditioner is turned on, the compressor works, resulting in the refrigerant not being able to circulate normally, the compressor is evacuated, and the cylinder temperature rises rapidly. Due to the different materials and expansion coefficients of the internal components of the compressor, the piston expands due to heat, and the gap with the upper and lower end covers of the cylinder becomes smaller or even contacts, causing wear and even cylinder jamming, which can easily cause damage to the compressor.

[0067] In order to solve the above problems, the air conditioner of the present application adds a leaking stop valve detection module for detecting whether the stop valve is leaking and providing an alarm or protection when the stop valve is leaking.

[0068] In addition, since the stop valve remains in the open state after the air conditioner is turned on, the missed stop valve can generally be detected when the power is first turned on. If the detection result is open, the stop valve will always be in the open state because the stop valve will not be operated in the subsequent process. When the power is turned on again, the compressor frequency will not be limited and the compressor will be controlled at normal frequency to ensure a rapid cooling effect. If the detection result is closed, the stop valve missed opening signal is output to remind the installer to handle it and avoid damage to the compressor.

[0069] like Figure 1 As shown, the air conditioner of this embodiment includes an indoor unit, an outdoor unit and a stop valve located therebetween.

[0070] Among them, the outdoor unit includes a compressor, an outdoor heat exchanger, an outdoor fan, a throttling element, etc.

[0071] The indoor unit includes an indoor heat exchanger, an indoor fan, etc.

[0072] Of course, the throttling element can also be located in the chamber.

[0073] like Figure 2-6 As shown, the air conditioner also includes a detection module and a control module.

[0074] The detection module is used to detect the shut-off valve leakage opening parameters and transmit them to the control module.

[0075] The control module controls the frequency of the compressor differentially according to whether the air conditioner is powered on for the first time, and determines whether the stop valve is leaked according to the leak parameter and the leak condition.

[0076] The control module and the detection module are described below:

[0077] The detection module is used to detect the leakage opening parameters of the stop valve and transmit the leakage opening parameters to the control module.

[0078] In some embodiments, Figure 2 As shown, the detection module includes:

[0079] An operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0080] Indoor environment temperature detection module, used to detect indoor environment temperature Ti;

[0081] Indoor coil temperature detection module, used to detect indoor coil temperature Tc;

[0082] The whole machine current detection module is used to detect the whole machine current It.

[0083] The detection module is used to detect the leakage opening parameter of the stop valve when the air conditioner is powered on for the first time.

[0084] When the air conditioner is not powered on for the first time, the detection module may detect the leakage opening parameter of the stop valve, or the detection module may not detect the leakage opening parameter of the stop valve.

[0085] When the air conditioner is not powered on for the first time, the detection module detects the leakage opening parameters of the stop valve to prevent the abnormal situation that the compressor is damaged due to vacuum due to obstruction of refrigerant flow caused by foreign matter or ice blockage (the effect is equivalent to closing the stop valve).

[0086] The control module is used to calculate the target frequency of the compressor according to the indoor ambient temperature and the set temperature.

[0087] In some embodiments, the control module is configured to periodically calculate a target frequency of the compressor.

[0088] The control module is also used to control the compressor according to the first target frequency when the air conditioner is powered on for the first time, so that the actual operating frequency of the compressor reaches the first target frequency. The first target frequency is a frequency lower than the target frequency to protect the compressor before the stop valve is determined to be in an open state.

[0089] The first target frequency is less than the target frequency, or the first target frequency is less than or equal to the target frequency.

[0090] When the air conditioner is not powered on for the first time, the compressor is subjected to normal frequency control, that is, the compressor is controlled according to the target frequency so that the actual operating frequency of the compressor reaches the target frequency, so as to facilitate rapid cooling.

[0091] The control module is also used to output a stop valve leakage opening signal when the leakage opening parameter of the stop valve meets the leakage opening condition.

[0092] Since the stop valve is generally not operated after the air conditioner is installed, if the stop valve is in the open state after the air conditioner is installed, it will remain in the open state. The leakage stop valve can generally be detected when the air conditioner is powered on for the first time. If the detection result is open, the stop valve will always be in the open state in the subsequent process because the stop valve is not operated. When the power is turned on again, the compressor frequency is not limited and the compressor is controlled at normal frequency to ensure a rapid cooling effect. If the detection result is closed, the stop valve leakage signal is output to remind the installer to handle it and avoid damage to the compressor.

[0093] When the control module determines that the air conditioner is powered on for the first time, it cannot confirm whether the stop valve is in a normal open state. When the stop valve is closed, the higher the compressor operating frequency, the faster the cylinder temperature rises, and the higher the probability of the compressor being stuck in the cylinder due to thermal expansion of the piston. Therefore, the strategy of limiting frequency operation is implemented when the air conditioner is powered on for the first time to slow down the increase in cylinder temperature caused by the vacuum operation of the compressor when the stop valve is not opened.

[0094] When the compressor is powered on for the first time, it is controlled at a first target frequency lower than the target frequency, and it is determined whether the stop valve is leaked. If there is no problem of leaking the stop valve, it will not affect the normal use of the subsequent units. At the same time, when it is detected that the stop valve is leaked, a stop valve leak signal is output to protect the compressor to the greatest extent. When it is not powered on for the first time, the compressor is controlled at the target frequency to achieve a rapid cooling effect.

[0095] In some embodiments, Figure 3 As shown, the shut-off valve leakage signal output by the control module is used to control the alarm module to alarm, so as to remind the installer to deal with it in time. Among them, the alarm method can be alarmed through the display screen and / or buzzer of the air conditioner itself, or it can be transmitted to the control terminal or smart terminal through wireless transmission.

[0096] In some embodiments, Figure 4 As shown, the shut-off valve leakage open signal output by the control module is directly used to control the air conditioner shutdown protection module to perform shutdown protection.

[0097] In some embodiments, Figure 5 As shown, the shut-off valve leakage signal output by the control module is used to control the alarm module to alarm on the one hand, and to control the air conditioner shutdown protection module to perform shutdown protection on the other hand.

[0098] In some embodiments, the first target frequency is a product of the target frequency and a frequency limiting factor, wherein the frequency limiting factor ∈ (0, 1).

[0099] The frequency limiting factor is negatively correlated with the outdoor ambient temperature and positively correlated with the outdoor ambient temperature adjustment value. The outdoor ambient temperature adjustment value is negatively correlated with the target frequency or the interval to which the target frequency belongs.

[0100] The higher the outdoor ambient temperature, the smaller the frequency limiting factor, and the lower the outdoor ambient temperature, the larger the frequency limiting factor; the larger the target frequency or the larger the interval to which the target frequency belongs, the smaller the outdoor environment adjustment value, and the smaller the target frequency or the smaller the interval to which the target frequency belongs, the larger the outdoor environment adjustment value; the larger the outdoor ambient temperature adjustment value, the larger the frequency limiting factor, and the smaller the outdoor ambient temperature adjustment value, the larger the frequency limiting factor.

[0101] Compressor target frequency range Outdoor ambient temperature adjustment value Interval 1 T11 Interval 2 T12 Interval 3 T13 Interval 4 T14 Interval 5 T15 Interval 6 T16

[0102] Here, the frequency of interval 1 is less than the frequency of interval 2, less than the frequency of interval 3, less than the frequency of interval 4, less than the frequency of interval 5, less than the frequency of interval 6. T11 ≥ T12 > T13 > T14 > T15 ≥ T16.

[0103] Differentiated adjustment of the first target frequency according to the target frequency, outdoor ambient temperature and outdoor ambient temperature adjustment value can reduce the adverse effects on the compressor when the shut-off valve is missed, and at the same time, make the first target frequency as close to the target frequency as possible to ensure the cooling effect.

[0104] In some embodiments, the frequency limiting factor is equal to the difference between 1 and T1, where T1 is the difference between the outdoor ambient temperature and the outdoor ambient temperature adjustment value / 100.

[0105] That is, the frequency limiting factor = 1-(the difference between the outdoor ambient temperature and the outdoor ambient temperature adjustment value) / 100.

[0106] The first target frequency = target frequency × [1-(outdoor ambient temperature-outdoor ambient temperature adjustment value) / 100].

[0107] When the air conditioner is powered on for the first time, the compressor is controlled according to the restricted first target frequency, which is lower than the target frequency. At the same time, the first target frequency is not a fixed value, but changes in association with the compressor target frequency and the frequency limiting factor, which in turn changes in association with the outdoor ambient temperature and the outdoor ambient temperature adjustment value. The limiting factor is not "one size fits all", but changes with the changes in the outdoor ambient temperature and the outdoor ambient temperature adjustment value, which ensures that the compressor runs in a relatively low-to-medium frequency band when it is powered on for the first time, preventing rapid damage to the compressor due to missed shut-off valves, and also preventing the compressor from running to too low a frequency band, resulting in poor cooling effect.

[0108] In some embodiments, the control module is used to control the compressor according to a lower set frequency after the shut-off valve leakage parameter meets the leakage condition, that is, to control the target frequency of the compressor to drop to the set frequency, so that the actual operating frequency of the compressor reaches the set frequency, and output the shut-off valve leakage signal when the shut-off valve leakage parameter still meets the leakage condition. The set frequency is a frequency lower than the first target frequency. The set frequency < the first target frequency, or the set frequency ≤ the first target frequency.

[0109] Lowering the actual operating frequency of the compressor to a lower set frequency can further reduce the heating of the compressor cylinder. If the leakage opening condition is still met when running at this frequency, the stop valve is further determined to be leakage open, ensuring that the output stop valve leakage opening signal is accurate and no false alarm occurs.

[0110] In some embodiments, the control module is used to control the compressor according to a set frequency after the shut-off valve leakage parameter meets the leakage condition for a first set time, that is, to control the target frequency of the compressor to drop to the set frequency, so that the actual operating frequency of the compressor reaches the set frequency, and output a shut-off valve leakage signal when the shut-off valve leakage parameter still meets the leakage condition. The set frequency is a frequency lower than the first target frequency.

[0111] When the shut-off valve leakage opening parameter meets the leakage opening condition and the first set time is used as the judgment condition, the shut-off valve leakage opening can be further determined, ensuring that the output shut-off valve leakage opening signal is accurate and no false alarm occurs.

[0112] In some embodiments, the set frequency may be the lowest operating frequency of the compressor. If the above conditions continue to be met after the compressor runs at the lowest operating frequency for the first set time, the air conditioner enters an alarm state and shuts down for protection. This judgment condition can further determine whether the stop valve is leaking open, ensuring that the output stop valve leaking open signal is accurate and does not cause a false alarm.

[0113] In some embodiments, the control module is used to control the compressor according to the target frequency after the shut-off valve leakage opening parameter does not meet the leakage opening condition and continues for a second set time, that is, to control the compressor to enter normal frequency control. The shut-off valve leakage opening parameter does not meet the leakage opening condition and continues for the second set time, which can ensure that the shut-off valve is in an open state. At this time, the normal control program is entered. The normal control program is that the control module calculates the compressor target frequency according to the indoor ambient temperature and the set temperature, and controls the compressor by the calculated compressor target frequency.

[0114] In some embodiments, the leakage opening condition is to simultaneously meet the following three conditions:

[0115] Condition 1: The operating mode of the air conditioner is cooling mode;

[0116] Condition 2: The difference between the indoor ambient temperature Ti and the indoor coil temperature Tc is within the set range;

[0117] Condition 3: The whole machine current It is below the set current. The whole machine current being below the set current specifically means: the whole machine current ≤ the set current, or the whole machine current < the set current.

[0118] The setting range and the setting current are determined in advance through experiments. Through the above leakage opening parameters and leakage opening conditions, it can be accurately judged whether the stop valve is leaking.

[0119] When the stop valve is closed and the compressor is running, the refrigerant in the refrigerant circulation system cannot circulate, and the indoor heat exchanger has no heat exchange. Therefore, the indoor heat exchanger coil temperature Tc is equivalent to the indoor unit ambient temperature Ti, and there is no obvious temperature difference. At the same time, the compressor is in a vacuum state, the load is small, and the operating current of the whole machine is small.

[0120] In some embodiments, the set current is determined in advance through experiments (valve closing test, low refrigerant test), which is generally related to the machine model. The set current is positively correlated with the unit capacity.

[0121] Unit capacity (×100W) Minimum operating current of the whole machine I_t (A) R1 I1 R2 I2 R3 I3 R4 I4

[0122] Among them, R1<R2<R3<R4, I1≤I2<I3<I4.

[0123] In some embodiments, Figure 6 As shown, the detection module includes:

[0124] An operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0125] Indoor environment temperature detection module, used to detect indoor environment temperature Ti;

[0126] Indoor coil temperature detection module, used to detect indoor coil temperature Tc;

[0127] The whole machine current detection module is used to detect the whole machine current It;

[0128] The electronic expansion valve opening detection module is used to detect the electronic expansion valve opening EVO.

[0129] In some embodiments of the present application, the control module is used to calculate the target opening of the electronic expansion valve.

[0130] Among them, the target opening of the electronic expansion valve is first executed according to the preset initial opening, and then the compressor exhaust temperature Td is periodically detected, and the EVO target opening is periodically adjusted according to the difference between the compressor exhaust temperature Td and the compressor target exhaust temperature Tdo.

[0131] When Td-Tdo<-e, the EVO opening decreases; the smaller Td-Tdo is, the more the EVO opening decreases;

[0132] When Td-Tdo>e, the EVO opening increases; the larger the Td-Tdo, the more the EVO opening increases;

[0133] When -e≤Td-Tdo≤e, EVO maintains the current opening unchanged.

[0134] The control module is also used to control the electronic expansion valve according to the first target opening when the air conditioner is powered on for the first time, so that the actual opening of the electronic expansion valve reaches the first target opening. The first target opening is an opening higher than the target opening, so as to protect the compressor before the stop valve is determined to be in an open state.

[0135] The first target opening>the target opening, or the first target opening≥the target opening.

[0136] When the air conditioner is not powered on for the first time, the electronic expansion valve is normally opened, that is, the electronic expansion valve is controlled according to the target opening so that the actual opening of the electronic expansion valve reaches the target opening, so as to facilitate rapid cooling.

[0137] When the air conditioner is powered on for the first time, the opening of the electronic expansion valve is higher than the target opening, which can prevent the compressor exhaust temperature from rising rapidly due to the small opening of the electronic expansion valve when the shut-off valve is leaking or the refrigerant is low, causing overheating and damage to the compressor cylinder.

[0138] In some embodiments, the first target opening is a product of the target opening and an opening limit factor, wherein the opening limit factor ∈(1, 2).

[0139] The opening limit factor is positively correlated with the outdoor ambient temperature and the outdoor ambient temperature adjustment value, and the outdoor ambient temperature adjustment value is negatively correlated with the target opening or the interval to which the target opening belongs.

[0140] The higher the outdoor ambient temperature, the larger the opening limit factor, and the lower the outdoor ambient temperature, the smaller the opening limit factor; the larger the target frequency or the larger the interval to which the target frequency belongs, the smaller the outdoor environment adjustment value, and the smaller the target frequency or the smaller the interval to which the target frequency belongs, the larger the outdoor environment adjustment value; the larger the outdoor ambient temperature adjustment value, the larger the opening limit factor, and the smaller the outdoor ambient temperature adjustment value, the larger the opening limit factor.

[0141] Electronic expansion valve target opening EVO Outdoor ambient temperature adjustment value Interval 1 T21 Interval 2 T22 Interval 3 T23 Interval 4 T24 Interval 5 T25

[0142] Among them, the opening degree of section 1 < the opening degree of section 2 < the opening degree of section 3 < the opening degree of section 4 < the opening degree of section 5. T21 ≥ T22 > T23 > T24 > T25.

[0143] Differentiated adjustment of the first target opening according to the target opening, outdoor ambient temperature and outdoor ambient temperature adjustment value can reduce the adverse effects on the compressor when the shut-off valve is missed, and at the same time, make the first target opening as close to the target opening as possible to ensure the cooling effect.

[0144] In some embodiments of the present application, the opening limit factor is equal to the sum of 1 and T2, where T2 is the sum of the outdoor ambient temperature and the outdoor ambient temperature adjustment value / 100.

[0145] That is, the opening limit factor = 1 + (outdoor ambient temperature + outdoor ambient temperature adjustment value) / 100.

[0146] The first target opening = target opening × [1 + (outdoor ambient temperature + outdoor ambient temperature adjustment value) / 100].

[0147] In some embodiments, when the stop valve is closed, the refrigerant cannot circulate, and the indoor heat exchanger has no heat exchange. Therefore, the indoor heat exchanger coil temperature Tc is equivalent to the indoor unit ambient temperature Ti, and there is no obvious temperature difference; at the same time, the compressor is in vacuum, the load is small, the whole machine operating current is small, and the electronic expansion valve opening is large. According to the above operating characteristics, the leakage opening condition meets the following three conditions at the same time:

[0148] Condition 1: The operating mode of the air conditioner is cooling mode;

[0149] Condition 2: The difference between the indoor ambient temperature Ti and the indoor coil temperature Tc is within the set range;

[0150] Condition 3: The whole machine current It is below the set current, or the electronic expansion valve opening EVO is above the set opening EVO_t.

[0151] When the whole machine current is below the set current, it is specifically: the whole machine current ≤ the set current or the whole machine current < the set current; when the electronic expansion valve opening is above the set opening, it is specifically: the electronic expansion valve opening ≥ the set opening or the electronic expansion valve opening > the set opening.

[0152] Among them, the setting range, setting current and setting opening are predetermined, and whether the stop valve is leaking can be judged more accurately through the above leaking opening parameters and leaking opening conditions.

[0153] In some embodiments, the set opening is calculated by a formula, and the formula for the set opening is determined in advance through experiments (valve closing test, low refrigerant test), and is generally related to the model. The set opening is positively correlated with the outdoor ambient temperature, set opening = a + (outdoor ambient temperature - b) × c, where coefficients a, b, and c are determined in advance through experiments (valve closing test, low refrigerant test).

[0154] like Figure 7 As shown, in some embodiments the air conditioner includes a flag storage module.

[0155] The flag storage module is used to store the first power-on flag information of the air conditioner. When the control module reads the information stored in the flag storage module as the first power-on flag information, it determines that the air conditioner is powered on for the first time, otherwise it determines that the air conditioner is not powered on for the first time.

[0156] The control module is also used to modify the information stored in the flag storage module to non-first power-on flag information after the air conditioner is powered on for the first time, so as to identify the air conditioner as not being powered on for the first time in the subsequent power-on process.

[0157] By setting the flag storage module, it is possible to accurately determine whether the air conditioner is powered on for the first time, perform frequency limiting control at the first power-on, and detect whether the air conditioner has a problem of missing the shut-off valve.

[0158] In some embodiments, the control module is used to modify the information stored in the flag storage module to non-first power-on flag information when the air conditioner is powered on and the shut-off valve leakage opening parameter does not meet the leakage opening condition. The control module is used to control the compressor according to the first target frequency when the flag storage module stores the first power-on flag information, so that the actual operating frequency of the compressor reaches the first target frequency, and when the flag storage module stores the non-first power-on flag information, perform normal frequency control on the compressor, and control the compressor according to the target frequency, so that the actual operating frequency of the compressor reaches the target frequency. Only when the flag storage module stores the non-first power-on flag information, the compressor is controlled at normal frequency to fully ensure that the shut-off valve is opened.

[0159] The control module is used to modify the information stored in the flag storage module to non-first power-on flag information when the air conditioner is powered on for the first time and there is no situation where the stop valve is leaked. The control module is used not to modify the information stored in the flag storage module when the air conditioner is powered on for the first time and there is a situation where the stop valve is leaked, that is, the information stored in the flag storage module is still the first power-on flag information, so as to facilitate the judgment of whether the stop valve is leaked when the power is turned on next time. At this time, the control module is used to limit the frequency control of the compressor when the information stored in the flag storage module is the first power-on flag information (it may be the first power-on of the air conditioner, or it may be the first power-on, the second power-on, etc. of the air conditioner, until the control module determines that the stop valve leak opening parameter detected by the detection module is the stop valve open state, and the information stored in the flag storage module is modified to non-first power-on).

[0160] There are cases where the air conditioner needs to be disassembled and moved, and there is also a case where the stop valve leaks. In order to meet the stop valve leakage detection needs in this situation, when the stop valve is closed during disassembly and relocation, the control module receives the stop valve closing signal, and the control module modifies the information stored in the flag storage module to the first power-on flag information, so that when the air conditioner is powered on for the first time, the control module reads the information in the flag storage module as the first power-on flag information.

[0161] After the air conditioner is installed, it is powered on and the flag storage module is judged whether it is the first power-on identification information. If it is the first power-on, the compressor is controlled at a limited frequency after the target frequency of the compressor is limited according to the relationship between the indoor ambient temperature and the set temperature. The leakage opening parameter of the stop valve is detected and compared with the leakage opening condition. When the leakage opening parameter of the stop valve meets the leakage opening condition, a stop valve leakage opening signal is output to perform an alarm and / or shutdown protection processing. When the leakage opening parameter of the stop valve does not meet the leakage opening condition and continues for a second set time, it indicates that the stop valve is open, and the compressor is controlled to enter normal frequency control, which can ensure that the normal control program is entered when the stop valve is open.

[0162] In some embodiments, when the air conditioner enters an alarm state and shuts down for protection, the control module also modifies the information stored in the flag storage module to the first power-on flag information, so that the switch status of the stop valve can be detected when the air conditioner is powered on next time.

[0163] like Figure 8 As shown, the working process of the air conditioner is:

[0164] S1. Turn on the air conditioner and calculate the target frequency of the compressor.

[0165] S2. Obtain whether the information stored in the flag storage module is the first power-on flag information. If so, proceed to step S3. Otherwise, the information stored in the storage module is the non-first power-on flag information, proceed to step S10.

[0166] S3. Control the compressor according to the first target frequency.

[0167] The first target frequency=the target frequency of the compressor×the frequency limiting factor.

[0168] The target frequency of the compressor is determined according to the relationship between the indoor ambient temperature and the set temperature.

[0169] S4. The detection module detects the leakage opening parameters of the stop valve.

[0170] Specifically: an operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0171] Indoor environment temperature detection module, used to detect indoor environment temperature Ti;

[0172] Indoor coil temperature detection module, used to detect indoor coil temperature Tc;

[0173] The whole machine current detection module is used to detect the whole machine current It.

[0174] S5: Whether the leakage opening parameter meets the leakage opening condition and lasts for the first set time, if so, proceed to step S6, otherwise, proceed to step S9.

[0175] S6: Is the target frequency of the compressor lower than the set frequency? If so, proceed to step S7; otherwise, proceed to step S8.

[0176] S7, output stop valve leakage open signal.

[0177] The shut-off valve leakage signal is used to control the alarm and / or control the air conditioner shutdown protection.

[0178] S8. Control the target frequency of the compressor to decrease to the set frequency, and proceed to step S4.

[0179] S9: The stop valve leakage opening parameter does not meet the leakage opening condition and lasts for a second set time. If so, go to step S10; otherwise, go to step S4.

[0180] S10: Perform normal frequency control on the compressor.

[0181] like Fig. 9 As shown, in some embodiments, when the information stored in the storage module is not the first power-on information, the compressor is controlled at normal frequency. At this time, the detection module still detects the shut-off valve leakage parameter to determine the abnormal situation of damage caused by compressor vacuuming caused by obstruction of refrigerant flow due to foreign matter or ice blockage (the effect is equivalent to the shut-off valve being closed). The working process of the air conditioner is as follows:

[0182] S1. Turn on the air conditioner and calculate the target frequency of the compressor.

[0183] S2. Obtain whether the information stored in the flag storage module is the first power-on flag information. If so, proceed to step S3. Otherwise, the information stored in the storage module is the non-first power-on flag information, proceed to step S11.

[0184] S3. Control the compressor according to the first target frequency.

[0185] The first target frequency=the target frequency of the compressor×the frequency limiting factor.

[0186] The target frequency of the compressor is determined according to the relationship between the indoor ambient temperature and the set temperature.

[0187] S4. The detection module detects the leakage opening parameters of the stop valve.

[0188] Specifically: an operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0189] Indoor environment temperature detection module, used to detect indoor environment temperature Ti;

[0190] Indoor coil temperature detection module, used to detect indoor coil temperature Tc;

[0191] The whole machine current detection module is used to detect the whole machine current It.

[0192] S5: Whether the leakage opening parameter meets the leakage opening condition and lasts for the first set time, if so, proceed to step S6, otherwise, proceed to step S9.

[0193] S6: Is the target frequency of the compressor lower than the set frequency? If so, proceed to step S7; otherwise, proceed to step S8.

[0194] S7, output stop valve leakage open signal.

[0195] The shut-off valve leakage signal is used to control the alarm and / or control the air conditioner shutdown protection.

[0196] S8. Control the target frequency of the compressor to decrease to the set frequency, and proceed to step S4.

[0197] S9: The stop valve leakage opening parameter does not meet the leakage opening condition and lasts for a second set time. If so, go to step S10; otherwise, go to step S4.

[0198] S10: Perform normal frequency control on the compressor.

[0199] The compressor is controlled at a compressor target frequency determined by the indoor ambient temperature and the set temperature.

[0200] S11, perform normal frequency control on the compressor and normal opening control on the electronic expansion valve, and proceed to step S4.

[0201] The compressor is controlled at a compressor target frequency determined by the indoor ambient temperature and the set temperature.

[0202] like Fig.10 As shown, the working process of the air conditioner is:

[0203] S1. Turn on the air conditioner, calculate the target frequency of the compressor, and calculate the target opening of the electronic expansion valve.

[0204] S2. Obtain whether the information stored in the flag storage module is the first power-on flag information. If so, proceed to step S3. Otherwise, the information stored in the storage module is the non-first power-on flag information, proceed to step S10.

[0205] S3. Control the compressor according to a first target frequency, and control the electronic expansion valve according to a first target opening.

[0206] The first target frequency=the target frequency of the compressor×the frequency limiting factor.

[0207] The target frequency of the compressor is determined according to the relationship between the indoor ambient temperature and the set temperature.

[0208] The first target opening = the target opening of the electronic expansion valve × the opening limit factor.

[0209] S4. The detection module detects the leakage opening parameters of the stop valve.

[0210] Specifically: an operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0211] Indoor environment temperature detection module, used to detect indoor environment temperature Ti;

[0212] Indoor coil temperature detection module, used to detect indoor coil temperature Tc;

[0213] The whole machine current detection module is used to detect the whole machine current It;

[0214] The electronic expansion valve opening detection module is used to detect the opening of the electronic expansion valve.

[0215] S5: Whether the leakage opening parameter meets the leakage opening condition and lasts for the first set time, if so, proceed to step S6, otherwise, proceed to step S9.

[0216] S6: Is the target frequency of the compressor lower than the set frequency? If so, proceed to step S7; otherwise, proceed to step S8.

[0217] S7, output stop valve leakage open signal.

[0218] The shut-off valve leakage signal is used to control the alarm and / or control the air conditioner shutdown protection.

[0219] S8. Control the target frequency of the compressor to decrease to the set frequency, and proceed to step S4.

[0220] S9: The stop valve leakage opening parameter does not meet the leakage opening condition and lasts for a second set time. If so, go to step S10; otherwise, go to step S4.

[0221] S10, performing normal frequency control on the compressor and normal opening control on the electronic expansion valve.

[0222] like Fig.11 As shown, in some embodiments, when the information stored in the storage module is not the first power-on information, the compressor is controlled at normal frequency. At this time, the detection module still detects the shut-off valve leakage parameter to determine the abnormal situation of damage caused by compressor vacuuming caused by obstruction of refrigerant flow due to foreign matter or ice blockage (the effect is equivalent to the shut-off valve being closed). The working process of the air conditioner is as follows:

[0223] S1. Turn on the air conditioner, calculate the target frequency of the compressor, and calculate the target opening of the electronic expansion valve.

[0224] S2. Obtain whether the information stored in the flag storage module is the first power-on flag information. If so, proceed to step S3. Otherwise, the information stored in the storage module is the non-first power-on flag information, proceed to step S11.

[0225] S3. Control the compressor according to a first target frequency, and control the electronic expansion valve according to a first target opening.

[0226] The first target frequency=the target frequency of the compressor×the frequency limiting factor.

[0227] The target frequency of the compressor is determined according to the relationship between the indoor ambient temperature and the set temperature.

[0228] The first target opening = the target opening of the electronic expansion valve × the opening limit factor.

[0229] S4. The detection module detects the leakage opening parameters of the stop valve.

[0230] Specifically: an operation mode acquisition module, used to acquire the operation mode of the air conditioner;

[0231] Indoor environment temperature detection module, used to detect indoor environment temperature Ti;

[0232] Indoor coil temperature detection module, used to detect indoor coil temperature Tc;

[0233] The whole machine current detection module is used to detect the whole machine current It;

[0234] The electronic expansion valve opening detection module is used to detect the opening of the electronic expansion valve.

[0235] S5: Whether the leakage opening parameter meets the leakage opening condition and lasts for the first set time, if so, proceed to step S6, otherwise, proceed to step S9.

[0236] S6: Is the target frequency of the compressor lower than the set frequency? If so, proceed to step S7; otherwise, proceed to step S8.

[0237] S7, output stop valve leakage open signal.

[0238] The shut-off valve leakage signal is used to control the alarm and / or control the air conditioner shutdown protection.

[0239] S8. Control the target frequency of the compressor to decrease to the set frequency, and proceed to step S4.

[0240] S9: The stop valve leakage opening parameter does not meet the leakage opening condition and lasts for a second set time. If so, go to step S10; otherwise, go to step S4.

[0241] S10, performing normal frequency control on the compressor and normal opening control on the electronic expansion valve.

[0242] The compressor is controlled at a compressor target frequency determined by the indoor ambient temperature and the set temperature.

[0243] S11, perform normal frequency control on the compressor and normal opening control on the electronic expansion valve, and proceed to step S4.

[0244] The compressor is controlled at a compressor target frequency determined by the indoor ambient temperature and the set temperature.

[0245] This application adds a flag storage module to determine whether the air conditioner is powered on for the first time. Combined with the characteristics that the opening and closing state of the stop valve is not easy to change, and the fact that the compressor damage caused by the missed stop valve mostly occurs during the first power-on operation stage, the compressor is controlled in a targeted manner. When it is determined that the air conditioner is powered on for the first time, considering that the probability of the stop valve being missed is relatively high, the compressor operating frequency is limited for the purpose of protecting the compressor. The higher the target operating frequency, the greater the limit, ensuring that the compressor operates at a medium and low frequency. If the stop valve is missed, the medium and low frequency operation of the compressor can greatly reduce the probability of damage to the compressor of the unit product. When it is determined that the unit is not powered on for the first time, the probability of the missed stop valve is relatively small, so there is no excessive restriction on the compressor operating frequency, ensuring the refrigeration effect in the startup stage and improving the user experience.

[0246] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioner, comprising: Indoor unit; Outdoor unit; A stop valve, wherein the stop valve is located between the indoor unit and the outdoor unit; wherein the air conditioner further comprises: A detection module, used for detecting the leakage opening parameter of the stop valve; A control module for calculating a target frequency of the compressor; the control module is also used to control the compressor according to a first target frequency when the air conditioner is powered on for the first time, and to control the compressor according to the target frequency when the air conditioner is not powered on for the first time; the control module is also used to output a stop valve leakage opening signal when the leakage opening parameter of the stop valve meets the leakage opening condition; wherein the first target frequency is a frequency lower than the target frequency.

2. The air conditioner according to claim 1, characterized in that: The first target frequency is the product of the target frequency and the frequency limiting factor, wherein the frequency limiting factor∈(0,1]; the frequency limiting factor is negatively correlated with the outdoor ambient temperature and positively correlated with the outdoor ambient temperature adjustment value, and the outdoor ambient temperature adjustment value is negatively correlated with the target frequency or the interval to which the target frequency belongs.

3. The air conditioner according to claim 2, characterized in that: The frequency limiting factor is equal to the difference between 1 and T1, where T1 is the difference between the outdoor ambient temperature and the outdoor ambient temperature adjustment value / 100.

4. The air conditioner according to claim 1, characterized in that: The control module is used to control the compressor according to a set frequency after the stop valve leakage opening parameter meets the leakage opening condition, and output a stop valve leakage opening signal when the stop valve leakage opening parameter still meets the leakage opening condition, and the set frequency is a frequency lower than the first target frequency.

5. The air conditioner according to claim 1, characterized in that: The detection module comprises: An operation mode acquisition module, used to acquire the operation mode of the air conditioner; Indoor environment temperature detection module, used to detect indoor environment temperature; Indoor coil temperature detection module, used to detect indoor coil temperature; The whole machine current detection module is used to detect the whole machine current; The leakage opening condition is: The operation mode of the air conditioner is a cooling mode, the difference between the indoor ambient temperature and the indoor coil temperature is within a set range, and the whole machine current is below a set current.

6. The air conditioner according to any one of claims 1 to 5, characterized in that: The control module is used to calculate the target opening of the electronic expansion valve; the control module is also used to control the electronic expansion valve according to a first target opening when the air conditioner is powered on for the first time, and to control the electronic expansion valve according to the target opening when the air conditioner is not powered on for the first time; wherein the first target opening is an opening that is higher than the target opening.

7. The air conditioner according to claim 6, characterized in that: The first target opening is the product of the target opening and the opening limit factor, wherein the opening limit factor ∈ (1, 2); the opening limit factor is positively correlated with the outdoor ambient temperature and the outdoor ambient temperature adjustment value, and the outdoor ambient temperature adjustment value is negatively correlated with the target opening or the interval to which the target opening belongs.

8. The air conditioner according to claim 7, characterized in that: The opening limit factor is equal to the sum of 1 and T2, where T2 is the sum of the outdoor ambient temperature and the outdoor ambient temperature adjustment value / 100.

9. The air conditioner according to claim 6, characterized in that: The detection module comprises: An operation mode acquisition module, used to acquire the operation mode of the air conditioner; Indoor environment temperature detection module, used to detect indoor environment temperature; Indoor coil temperature detection module, used to detect indoor coil temperature; The whole machine current detection module is used to detect the whole machine current; An electronic expansion valve opening detection module is used to detect the opening of the electronic expansion valve; The leakage opening condition is: The operation mode of the air conditioner is cooling mode, the difference between the indoor ambient temperature and the indoor coil temperature is within a set range, and the whole machine current is below the set current; or, the operation mode of the air conditioner is cooling mode, the difference between the indoor ambient temperature and the indoor coil temperature is within a set range, and the opening of the electronic expansion valve is above the set opening.

10. The air conditioner according to any one of claims 1-5, 7-9, characterized in that: The air conditioner also includes: A flag storage module, used for storing the first power-on flag information of the air conditioner; The control module is used to modify the information stored in the flag storage module to non-first power-on flag information after the air conditioner is powered on for the first time.

11. The air conditioner according to claim 6, characterized in that: The air conditioner also includes: A flag storage module, used for storing the first power-on flag information of the air conditioner; The control module is used to modify the information stored in the flag storage module to non-first power-on flag information after the air conditioner is powered on for the first time.

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