Air conditioner

Abstract

The application relates to an air conditioner, belonging to the technical field of air conditioners, which comprises an indoor unit, an indoor heat exchanger, an outdoor unit, an outdoor heat exchanger, an outdoor fan, a compressor and a controller, the indoor unit is arranged in the indoor, the indoor heat exchanger is arranged in the indoor unit, the outdoor unit is arranged in the outdoor, the outdoor heat exchanger is arranged in the outdoor unit, the compressor is arranged in the outdoor unit, and the controller is configured to: calculate a refrigerant sound prediction value, if the refrigerant sound prediction value is greater than a preset refrigerant sound value, calculate a compressor suction and discharge pressure difference value, if the compressor suction and discharge pressure difference value is less than a first preset air pressure difference value, judge the difference between a current discharge superheat value and a target discharge superheat value, define the difference as a superheat difference value, if the superheat difference value is less than a preset difference value, judge the relationship between the target discharge superheat value and a discharge superheat limit value, and if the target discharge superheat value is less than the discharge superheat limit value, increase the compressor discharge superheat.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to an air conditioner. BACKGROUND

[0002] An air conditioner is a device that artificially adjusts and controls the temperature, humidity, and flow rate of air in a building or structure. A wall-mounted air conditioner is widely used because it is cost-effective, occupies less indoor space, is not limited by installation location, and is easier to match with indoor decorations.

[0003] In an air conditioner, the design of the refrigeration system must ensure that the refrigerant in the condenser is located in the gas-liquid two-phase region as much as possible. The enthalpy of the refrigerant in this state is high, and the system operates with high energy efficiency. However, if there is too much gaseous refrigerant flowing out of the condenser, the refrigerant entering the throttling device will cause the bubbles to burst due to the sudden reduction in flow area, resulting in a significant refrigerant flow noise. High air conditioner noise causes user discomfort. SUMMARY

[0004] The present application at least partially solves one of the problems in the related art.

[0005] To this end, the present application aims to provide an air conditioner that reduces refrigerant noise and improves user experience by calculating a refrigerant noise prediction value and determining the relationship between the target discharge superheat value and the discharge superheat limit value, and by increasing the discharge superheat.

[0006] To achieve the above-mentioned purpose, the present application provides an air conditioner, comprising:

[0007] an indoor unit;

[0008] an indoor heat exchanger disposed in the indoor unit;

[0009] an outdoor unit;

[0010] an outdoor heat exchanger disposed in the outdoor unit;

[0011] an outdoor fan for blowing air over the outdoor heat exchanger to reduce the temperature of the refrigerant passing through the outdoor heat exchanger;

[0012] a compressor disposed in the outdoor unit, the compressor being configured to deliver refrigerant to the outdoor heat exchanger and the indoor heat exchanger;

[0013] a controller configured to calculate a refrigerant noise prediction value, and if the refrigerant noise prediction value is greater than a predetermined refrigerant noise value, to calculate a compressor suction and discharge pressure difference value;

[0014] If the compressor suction and discharge pressure difference value is less than the first preset air pressure difference value, a difference value between the current discharge superheat value and the target discharge superheat value is calculated, and the difference value is defined as a superheat difference value, if the superheat difference value is less than a preset difference value, the relationship between the target discharge superheat value and the discharge superheat limit value is judged, if the target discharge superheat value is less than the discharge superheat limit value, the compressor discharge superheat is increased.

[0015] In the technical scheme, by calculating the refrigerant sound prediction value and judging the relationship between the target discharge superheat value and the discharge superheat limit value, the discharge superheat is increased to reduce the refrigerant sound and improve the user experience.

[0016] In some embodiments of the present application, the indoor heat exchanger is connected and communicated with the first pipeline and the second pipeline; the outdoor heat exchanger is connected and communicated with the third pipeline and the fourth pipeline.

[0017] The first pipeline is connected in parallel with the third pipeline and the fourth pipeline.

[0018] The second pipeline is connected in parallel with the third pipeline and the fourth pipeline.

[0019] The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are respectively provided with a first adjusting member, a second adjusting member, a third adjusting member and a fourth adjusting member; and the fourth pipeline is provided with a throttling member.

[0020] In the technical scheme, by adjusting the first adjusting member, the second adjusting member, the third adjusting member and the fourth adjusting member, the control of the discharge superheat is realized to adjust the refrigerant sound.

[0021] In some embodiments of the present application, the controller is configured to:

[0022] If the compressor suction and discharge pressure difference value is not less than the first preset air pressure difference value and does not exceed the second preset air pressure difference value;

[0023] If not, the second adjusting member and the third adjusting member are closed, the fourth adjusting member is opened, and the first adjusting member is controlled to be at a preset opening degree.

[0024] In the technical scheme, in this state, it is indicated that the compressor suction and discharge pressure difference value is moderate, and in this case, it may be difficult to meet the demand by adjusting the discharge superheat only, therefore, by adjusting the first adjusting member, the second adjusting member, the third adjusting member and the fourth adjusting member, the generation of the refrigerant sound is further reduced.

[0025] In some embodiments of the present application, the controller is configured to: determine whether the current air conditioner is in the preset mode, and if so, determine the difference between the current exhaust superheat value and the target exhaust superheat value, and if the difference is less than a preset difference, increase the compressor exhaust superheat.

[0026] In the technical solution, the air conditioner is determined to be in the preset mode to ensure that the current air conditioning system is in a stable state, and the refrigerant sound is reduced by adjusting the compressor exhaust superheat value.

[0027] In some embodiments of the present application, the controller is configured to: if the target exhaust superheat value is equal to the exhaust superheat limit value, determine whether the current outdoor fan speed reaches the maximum speed, and if not, increase the speed of the outdoor fan.

[0028] In the technical solution, when the target exhaust superheat value is equal to the exhaust superheat limit value, the demand for reducing the refrigerant sound cannot be met by adjusting the exhaust superheat alone. Therefore, the speed of the outdoor fan is adjusted to change the state of the refrigerant in the outdoor heat exchanger.

[0029] In some embodiments of the present application, the controller is configured to: when the speed of the outdoor fan is increased, calculate the target frequency value of the compressor, and obtain the current frequency value of the compressor, the difference between the target frequency value of the compressor and the current frequency value of the compressor being a frequency difference value, if the frequency difference value is greater than a first preset frequency value and less than a second preset frequency value, control the current frequency value of the compressor to reach the target frequency value of the compressor.

[0030] In the technical solution, after the speed of the outdoor fan is adjusted, the frequency of the compressor is further adjusted to further reduce the refrigerant sound. If the frequency difference value is greater than the first preset frequency value and less than the second preset frequency value, it means that there is a certain difference between the current frequency value of the compressor and the target frequency value of the compressor, and the frequency of the current compressor needs to be adjusted.

[0031] In some embodiments of the present application, the controller is configured to: if the frequency difference value is greater than the second preset frequency value, increase the frequency of the compressor.

[0032] In the technical solution, if the frequency difference value of the compressor is greater than the second preset frequency value, it means that the difference between the current frequency value of the compressor and the target frequency value of the compressor is large, so the frequency of the compressor is directly increased to reduce the refrigerant sound.

[0033] In some embodiments of the present application, the controller is configured to: if the compressor suction and discharge pressure difference value is greater than a second preset air pressure difference value, then turn on the third adjusting member and the fourth adjusting member; determine the difference value between the current discharge superheat value and the target discharge superheat value, and define the difference value as a superheat difference value; and if the superheat difference value is less than a preset difference value, then increase the compressor discharge superheat.

[0034] In the technical solution, in this state, it is indicated that the pressure difference of the inlet and outlet throttling members is too large, and the third adjusting member and the fourth adjusting member are controlled to reduce the pressure difference of the inlet throttling member, so as to reduce the refrigerant sound.

[0035] In addition, the present application also provides an air conditioner, which comprises:

[0036] An indoor unit;

[0037] An indoor heat exchanger arranged in the indoor unit;

[0038] An outdoor unit;

[0039] An outdoor heat exchanger arranged in the outdoor unit;

[0040] A compressor arranged in the outdoor unit, the compressor being configured to deliver refrigerant to the outdoor heat exchanger and the indoor heat exchanger;

[0041] A controller configured to: calculate a refrigerant sound prediction value, and if the refrigerant sound prediction value is greater than a preset refrigerant sound value, then calculate a compressor suction and discharge pressure difference value;

[0042] If the compressor suction and discharge pressure difference value is less than a first preset air pressure difference value, then enter a first primary mode;

[0043] If the compressor suction and discharge pressure difference value is not less than the first preset air pressure difference value and does not exceed a second preset air pressure difference value, then enter a second primary mode;

[0044] If the compressor suction and discharge pressure difference value is greater than the second preset air pressure difference value, then enter a third primary mode.

[0045] In the technical solution, according to the relationship between the compressor suction and discharge pressure difference value and the first preset air pressure difference value and the second preset air pressure difference value, a corresponding mode is entered, and different work is performed in the corresponding mode, so as to achieve targeted reduction of the refrigerant sound.

[0046] In some embodiments of the present application, the controller is configured to: in the first primary mode, calculate the difference value between the current discharge superheat value and the target discharge superheat value, and define the difference value as a superheat difference value; if the superheat difference value is greater than a preset difference value, then enter a first secondary mode; and if the superheat difference value is less than the preset difference value, then enter a second secondary mode.

[0047] In the second primary mode, it is judged whether the current air conditioner is in the preset mode, if not, the third secondary mode is entered, if yes, the fourth secondary mode is entered.

[0048] In the third primary mode, it is judged whether the third adjusting member and the fourth adjusting member are opened, if not, the fifth secondary mode is entered, if yes, the sixth secondary mode is entered.

[0049] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 It is the overall structure schematic view of air conditioner according to the embodiment of the application;

[0051] Figure 2 It is the structure schematic view of indoor unit of air conditioner according to the embodiment of the application;

[0052] Figure 3 It is the main view of indoor unit of air conditioner according to the embodiment of the application;

[0053] Figure 4 It is the principle view of air conditioner according to the embodiment of the application;

[0054] Figure 5 It is the working flow chart of air conditioner according to the embodiment of the application;

[0055] Figure 6 It is the working flow chart of air conditioner according to the embodiment of the application;

[0056] Figure 7 It is the working flow chart of air conditioner according to the embodiment of the application;

[0057] Figure 8 It is the working flow chart of air conditioner according to the embodiment of the application;

[0058] Figure 9 It is the working flow chart of air conditioner according to the embodiment of the application;

[0059] Figure 10 It is the working flow chart of air conditioner according to the embodiment of the application;

[0060] Figure 11 It is the working flow chart of air conditioner according to the embodiment of the application;

[0061] Figure 12 It is the working flow chart of air conditioner according to the embodiment of the application;

[0062] Figure 13is a working flow chart of an air conditioner according to an embodiment of the present application;

[0063] Figure 14 is a working flow chart of an air conditioner according to an embodiment of the present application;

[0064] Figure 15 is a working flow chart of an air conditioner according to an embodiment of the present application;

[0065] Figure 16 is a working flow chart of an air conditioner according to an embodiment of the present application.

[0066] In the above figures: 100, indoor unit; 200, outdoor unit; 300, indoor heat exchanger; 400, outdoor heat exchanger; 500, compressor; 600, first regulating member; 700, second regulating member; 800, third regulating member; 900, fourth regulating member; 110, throttling member; 120, four-way valve. DETAILED DESCRIPTION

[0067] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0068] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present application. Exemplary expressions of the above terms do not necessarily refer to the same embodiment or example in this specification, and the particular feature, structure, material, or characteristic can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine or recombine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction, as appropriate.

[0071] In the following, the present application will be specifically described through exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can be beneficially combined into other embodiments without further description.

[0072] In this application, the air conditioner performs a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, throttling, and evaporation, supplying cooling or heating to conditioned and heat-exchanged air. The compressor compresses refrigerant gas at a low temperature and low pressure, discharging it at a high temperature and high pressure. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The expansion valve throttles the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure, two-phase gas-liquid refrigerant. In the evaporator, the refrigerant, after absorbing heat and evaporating in the expansion valve, is in a low-temperature, low-pressure state, and then the refrigerant gas returns to the compressor. The evaporator achieves a cooling effect by utilizing the latent heat of vaporization of the refrigerant to exchange heat with the material being cooled. Throughout the cycle, the indoor unit of the air conditioner can regulate the temperature of the indoor space. The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit. The indoor and outdoor heat exchangers can be used as condensers or evaporators, respectively. When the indoor heat exchanger is used as a condenser, the indoor unit acts as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the indoor unit acts as a cooler in cooling mode.

[0073] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0074] As attached Figures 1 to 4 As shown, in an illustrative embodiment of the air conditioner of the present invention, the air conditioner includes: an indoor unit 100, an indoor heat exchanger 300, an outdoor unit 200, an outdoor heat exchanger 400, an outdoor fan, a compressor 500, and a controller. The indoor unit 100 is disposed indoors; the indoor heat exchanger 300 is disposed inside the indoor unit 100; the outdoor unit 200 is disposed outdoors; the outdoor heat exchanger 400 is disposed inside the outdoor unit 200; the outdoor fan is used to blow airflow across the outdoor heat exchanger 400 to reduce the temperature of the refrigerant passing through the outdoor heat exchanger 400; the compressor 500 is disposed inside the outdoor unit 200, and the compressor 500 is used to supply refrigerant to the outdoor heat exchanger 400 and the indoor heat exchanger 300.

[0075] Please refer to Figures 5 to 16, the controller is configured to: calculate a refrigerant sound prediction value, if the refrigerant sound prediction value is greater than a preset refrigerant sound value, calculate a compressor suction and discharge pressure difference value, if the compressor suction and discharge pressure difference value is less than a first preset air pressure difference value, determine the difference between the current discharge superheat value and the target discharge superheat value, and define the difference as a superheat difference value, if the superheat difference value is less than a preset difference value, determine the relationship between the target discharge superheat value and the discharge superheat limit value, and if the target discharge superheat value is less than the discharge superheat limit value, increase the compressor discharge superheat.

[0076] Through the above technical solution, by calculating the refrigerant sound prediction value and determining the relationship between the target discharge superheat value and the discharge superheat limit value, the discharge superheat is increased to reduce the refrigerant sound and improve the user experience.

[0077] Please refer to Figure 4 In some embodiments, the indoor heat exchanger 300 is connected and communicated with the first pipeline and the second pipeline; the outdoor heat exchanger 400 is connected and communicated with the third pipeline and the fourth pipeline; the first pipeline is connected in parallel with the third pipeline and the fourth pipeline; the second pipeline is connected in parallel with the third pipeline and the fourth pipeline; the first pipeline, the second pipeline, the third pipeline and the fourth pipeline are respectively provided with the first adjusting member 600, the second adjusting member 700, the third adjusting member 800 and the fourth adjusting member 900; the fourth pipeline is provided with the throttling member 110. By adjusting the first adjusting member 600, the second adjusting member 700, the third adjusting member 800 and the fourth adjusting member 900, the control of the discharge superheat is realized to realize the adjustment of the refrigerant sound.

[0078] During the operation of the air conditioner, the flow route of the refrigerant can be controlled by controlling the first adjusting member 600, the second adjusting member 700, the third adjusting member 800 and the fourth adjusting member 900.

[0079] In some embodiments, the air conditioner further comprises an exhaust pressure sensor, an exhaust temperature sensor, a suction pressure sensor, a suction temperature sensor, a first middle temperature sensor, a first outlet temperature sensor, a second middle temperature sensor and a second outlet temperature sensor. The exhaust pressure sensor, the exhaust temperature sensor, the suction pressure sensor and the suction temperature sensor are arranged in the outdoor unit 200 and used to detect the compressor 500. The first middle temperature sensor and the first outlet temperature sensor are arranged in the indoor unit 100 and used to detect the indoor heat exchanger 300. The second middle temperature sensor and the second outlet temperature sensor are arranged in the outdoor unit 200 and used to detect the outdoor heat exchanger 400.

[0080] In some embodiments, in the cooling mode, the outdoor heat exchanger 400 is used as a condenser, and the indoor heat exchanger 300 is used as an evaporator. In the heating mode, the outdoor heat exchanger 400 is used as an evaporator, and the indoor heat exchanger 300 is used as a condenser. The compressor 500 is further provided with a four-way valve 120 between the indoor heat exchanger 300 and the outdoor heat exchanger 400. The flow direction of the refrigerant can be adjusted through the four-way valve 120 to realize the switching between the cooling mode and the heating mode.

[0081] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to: if the compressor suction and discharge pressure difference is not less than the first preset pressure difference and does not exceed the second preset pressure difference; determine whether the current air conditioner is in a preset mode, if not, turn off the second adjusting member 700 and the third adjusting member 800, turn on the fourth adjusting member 900, and control the first adjusting member 600 to a preset opening degree. In this state, it indicates that the compressor suction and discharge pressure difference is moderate, and in this case, only adjusting the discharge superheat degree may not meet the demand, so the production of refrigerant sound is further reduced by adjusting the first adjusting member 600, the second adjusting member 700, the third adjusting member 800 and the fourth adjusting member 900. The preset mode is set according to different models and environments, which can be input by the user, sent by the cloud or preset by the factory.

[0082] In some embodiments, the controller is configured to: determine whether the current air conditioner is in a preset mode, if yes, determine the superheat difference between the current discharge superheat degree value and the target discharge superheat degree value, and if the superheat difference is less than a preset difference, increase the compressor discharge superheat degree. By confirming that the air conditioner is in a preset mode, it is ensured that the current air conditioning system is in a stable state, and the refrigerant sound is reduced by adjusting the compressor discharge superheat degree value.

[0083] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to: if the target discharge superheat degree value is equal to the discharge superheat degree limit value, determine whether the current outdoor fan speed reaches the maximum speed, and if not, increase the outdoor fan speed. When the target discharge superheat degree value is equal to the discharge superheat degree limit value, adjusting the discharge superheat degree alone cannot meet the demand of reducing the refrigerant sound. Therefore, the speed of the outdoor fan is adjusted to change the state of the refrigerant in the outdoor heat exchanger 400.

[0084] Please refer to Figures 5 to 16In some embodiments, the controller is configured to: calculate a target frequency value of the compressor when the rotating speed of the outdoor fan is increased, obtain a current frequency value of the compressor 500, calculate a frequency difference value between the target frequency value of the compressor and the current frequency value of the compressor 500, and control the frequency value of the compressor 500 to reach the target frequency value of the compressor if the frequency difference value is greater than a first preset frequency value and less than a second preset frequency value. After the rotating speed of the outdoor fan is adjusted, the frequency of the compressor 500 is further adjusted to reduce the refrigerant sound. If the frequency difference value is greater than the first preset frequency value and less than the second preset frequency value, it indicates that there is a certain difference between the frequency value of the compressor 500 and the target frequency value of the compressor, and the frequency of the compressor 500 needs to be adjusted.

[0085] In some embodiments, the controller is configured to: increase the frequency of the compressor 500 if the frequency difference value is greater than the second preset frequency value. If the frequency difference value of the compressor 500 is greater than the second preset frequency value, it indicates that the difference between the frequency value of the compressor 500 and the target frequency value of the compressor is large, and thus the frequency of the compressor 500 is directly increased to reduce the refrigerant sound.

[0086] In some embodiments, the controller is configured to: open the third adjusting member 800 and the fourth adjusting member 900 if the suction and discharge pressure difference value of the compressor is greater than a second preset pressure difference value; calculate a superheat difference value between a current superheat value and a target superheat value, and increase the superheat of the compressor if the superheat difference value is less than a preset difference value. In this state, it indicates that the pressure difference of the inlet and outlet throttling member 110 is too large, and the third adjusting member 800 and the fourth adjusting member 900 are controlled to reduce the pressure difference of the inlet throttling member 110 to reduce the refrigerant sound.

[0087] Please refer to Figures 1 to 4 In addition, another embodiment of the present application provides an air conditioner, which comprises the same as in the above embodiments: the indoor unit 100, the indoor heat exchanger 300, the outdoor unit 200, the outdoor heat exchanger 400, the compressor 500, and the controller.

[0088] Please refer to Figures 5 to 16 In the present embodiment, the difference from the above embodiments is that the controller is configured to enter the refrigerant sound adjustment program when the refrigerant sound needs to be adjusted or when the air conditioner is started to run. After entering the refrigerant sound adjustment program, the initial mode is entered, and the calculation of the discharge superheat, the subcooling degree, and the refrigerant sound prediction value is performed in the initial mode.

[0089] In some embodiments, the controller is configured to, after entering the refrigerant sound adjustment program, wait for a first preset time and then enter the initial mode. The first preset time is used to make the air conditioner enter a stable working state, thereby improving the accuracy of the detection result. The first preset time is set according to different models and environments, and can be input by the user, sent by the cloud, or preset by the factory.

[0090] In some embodiments, the calculation formula of the exhaust superheat degree, the supercooling degree and the refrigerant sound prediction value is as follows:

[0091]

[0092] DSH=T d -T c

[0093]

[0094] wherein, DSH is the compressor exhaust superheat degree, S is the refrigerant sound prediction value, Fre is the air conditioner compressor operating frequency, Tsub is the supercooling degree, PS is the suction pressure of the indoor heat exchanger, and Pd is the discharge pressure of the outdoor heat exchanger; wherein a1, b1, c1, d1, e1, f1, and n are constants, and the specific values of a1, b1, c1, d1, e1, f1, and n are adjusted according to different models. Tc is the outlet refrigerant temperature of the outdoor heat exchanger, Tc is the middle refrigerant temperature of the outdoor heat exchanger, and Td is the compressor discharge temperature.

[0095] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to, after the initial mode, determine the relationship between the refrigerant sound prediction value and the preset refrigerant sound value. If the refrigerant sound prediction value is less than the preset refrigerant sound value, it means that the current refrigerant sound is small and the air conditioner does not need to be adjusted. If the refrigerant sound prediction value is greater than the preset refrigerant sound value, it is confirmed that the air conditioner needs to be adjusted to reduce the refrigerant sound. Therefore, if the refrigerant sound prediction value is greater than the preset refrigerant sound value, the compressor suction and discharge pressure difference value is calculated, and the relationship between the compressor suction and discharge pressure difference value and the first preset pressure difference value and the second preset pressure difference value is determined.

[0096] In some embodiments, the calculation formula of the compressor suction and discharge pressure difference value is as follows:

[0097] ΔP=P d -P s

[0098] wherein, ΔP is the compressor suction and discharge pressure difference value, Pd is the discharge pressure of the compressor, and PS is the suction pressure of the compressor. d s

[0099] ​​In some embodiments, if the compressor suction and discharge pressure difference value is less than a first preset air pressure difference value, the first primary mode is entered; the first preset air pressure difference value is set according to different models and environments, and the first preset air pressure difference value can be input by a user, sent by a cloud, or preset by a factory.

[0100] In some embodiments, in the first primary mode, a difference value between the current discharge superheat value and the target discharge superheat value is calculated, and the difference value is defined as a superheat difference value; if the superheat difference value is greater than a preset difference value, the first secondary mode is entered; if the superheat difference value is less than the preset difference value, the second secondary mode is entered.

[0101] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to: after entering the first secondary mode, maintain the current running state for a second preset time, and then re-enter the initial mode. If the superheat difference value between the current discharge superheat value and the target discharge superheat value is greater than a preset difference value, it means that the system of the current air conditioner is unstable, so after waiting for a second preset time, the system of the air conditioner is stable, and then the initial mode is re-entered for re-judgment. The second preset time is set according to different models and environments, and the second preset time can be input by a user, sent by a cloud, or preset by a factory.

[0102] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to: in the second secondary mode, judge the relationship between the target discharge superheat value and a discharge superheat limit value. If the target discharge superheat value is less than the discharge superheat limit value, the first tertiary mode is entered. If the target discharge superheat value is equal to the discharge superheat limit value, the second tertiary mode is entered.

[0103] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to: in the first tertiary mode, increase the compressor discharge superheat. Specifically, a preset increment value is added to the compressor discharge superheat value.

[0104] In some embodiments, the controller is configured to: in the first tertiary mode, after increasing the compressor discharge superheat, re-enter the initial mode.

[0105] In some embodiments, the controller is configured to: in the first tertiary mode, after increasing the compressor discharge superheat, wait for a second preset time, and then re-enter the initial mode.

[0106] In some embodiments, the opening degree of the first adjusting member 600, the second adjusting member 700, the third adjusting member 800, and the fourth adjusting member 900 is adjusted to realize the adjustment of the compressor discharge superheat value.

[0107] In some embodiments, the controller is configured to, in the second tertiary mode, determine whether the current rotation speed of the outdoor fan reaches a maximum rotation speed; if the current rotation speed of the outdoor fan is less than the maximum rotation speed, enter the first quaternary mode, and if the current rotation speed of the outdoor fan is equal to the maximum rotation speed, enter the second quaternary mode.

[0108] In some embodiments, the maximum rotation speed of the outdoor fan is set according to different models and environments, and can also be input by a user, sent by a cloud, or preset by a factory.

[0109] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to, in the first quaternary mode, increase the rotation speed of the outdoor fan. Specifically, a preset incremental rotation speed is added to the current rotation speed of the outdoor fan. And the current rotation speed of the outdoor fan does not exceed the maximum rotation speed. Wherein, the preset incremental rotation speed is set according to different models and environments, and can also be input by a user, sent by a cloud, or preset by a factory.

[0110] In some embodiments, the controller is configured to, in the second quaternary mode, calculate a compressor target frequency value, obtain a current frequency value of the compressor 500, and calculate a frequency difference value between the compressor target frequency value and the current frequency value of the compressor 500, and determine the relationship between the frequency difference value and the first preset frequency value and the second preset frequency value.

[0111] In some embodiments, the calculation formula of the compressor target operating frequency is as follows:

[0112]

[0113] Wherein, Fre s is the compressor target operating frequency, a and b are constants, is the target exhaust gas superheat value, Fan ocu is the rotation speed of the outdoor fan or the indoor fan on the condenser side; Fre ocu is the current compressor operating frequency, and a and b are preset according to different models or sent by a cloud.

[0114] In some embodiments, the controller is configured to, in the second quaternary mode, if the frequency difference value is less than the first preset frequency value, enter the first quinary mode; if the frequency difference value is greater than the first preset frequency value and less than the second preset frequency value, enter the second quinary mode; and if the frequency difference value is greater than the second preset frequency value, enter the third quinary mode.

[0115] Please refer to Figures 5 to 16In some embodiments, the controller is configured to, in the first fifth mode, keep the current state running, and re-enter the initial mode for detection every third preset time interval. The number of detections is recorded. If the current state enters the first fifth mode after continuous detection, and the number of detections exceeds a preset number of times, the current state is kept running, and the refrigerant sound adjustment program is exited. In the first fifth mode, it is represented that the current air conditioner is in a normal working state and does not need to be adjusted for refrigerant sound. The preset number of times and the third preset time are set according to different models and environments, and can be input by a user, sent by a cloud, or preset by a factory.

[0116] In some embodiments, the controller is configured to, in the second fifth mode, control the frequency value of the current compressor 500 to reach the compressor target frequency value, and re-enter the initial mode after maintaining a fourth preset time. The fourth preset time is set according to different models and environments, and can be input by a user, sent by a cloud, or preset by a factory.

[0117] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to, in the third fifth mode, increase the frequency of the compressor 500. Specifically, a preset incremental frequency is added to the current operating frequency of the compressor 500.

[0118] In some embodiments, the controller is configured to, if the suction and discharge air pressure difference value of the compressor is not less than a first preset air pressure difference value and does not exceed a second preset air pressure difference value, enter the second first mode.

[0119] In some embodiments, the controller is configured to, in the second first mode, determine whether the current air conditioner is in a preset mode. If not, enter the third second mode; if yes, enter the fourth second mode.

[0120] In some embodiments, the controller is configured to, in the third second mode, close the second adjusting member 700 and the third adjusting member 800, open the fourth adjusting member 900, control the first adjusting member 600 to a preset opening degree, and enter the initial mode after a fifth preset time. In the third second mode, the refrigerant flows through the first pipeline, the second pipeline, and the throttling member 110 on the second pipeline. The fifth preset time and the preset opening degree are set according to different models and environments, and can be input by a user, sent by a cloud, or preset by a factory.

[0121] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to, in the fourth second mode, determine the size of the superheat difference between the current discharge superheat value and the target discharge superheat value. If the superheat difference is greater than a preset difference, enter the third third mode; if the superheat difference is less than the preset difference, enter the fourth third mode.

[0122] In some embodiments, the controller is configured to, in the third tertiary mode, re-enter the initial mode after maintaining the current state for a sixth preset time. The sixth preset time is set according to different models and environments, and can be input by a user, sent by a cloud, or preset by a factory.

[0123] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to, in the fourth tertiary mode, determine a difference between the current exhaust gas superheat value and the target exhaust gas superheat value, and if the difference is less than a preset difference and the target exhaust gas superheat value is less than an exhaust gas superheat limit value, increase the compressor exhaust gas superheat. Specifically, a preset increment value is added to the compressor exhaust gas superheat value, and the compressor exhaust gas superheat value does not exceed the exhaust gas superheat limit value.

[0124] In some embodiments, the controller is configured to, in the fourth tertiary mode, determine a difference between the current exhaust gas superheat value and the target exhaust gas superheat value, and if the difference is less than a preset difference and the target exhaust gas superheat value is less than an exhaust gas superheat limit value, increase the compressor exhaust gas superheat. Specifically, a preset increment value is added to the compressor exhaust gas superheat value, and the compressor exhaust gas superheat value does not exceed the exhaust gas superheat limit value.

[0125] In some embodiments, the controller is configured to, if the compressor suction and exhaust pressure difference value is greater than a second preset air pressure difference value, enter the third primary mode.

[0126] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to, in the third primary mode, determine whether the third adjusting member 800 and the fourth adjusting member 900 are opened, and if not, enter the fifth secondary mode, and if yes, enter the sixth secondary mode.

[0127] In some embodiments, the controller is configured to, in the fifth secondary mode, control the first adjusting member 600 and the second adjusting member 700 to have the same opening degree, and maintain the same opening degree for a seventh preset time, and then re-enter the initial mode. The seventh preset time is set according to different models and environments, and can be input by a user, sent by a cloud, or preset by a factory.

[0128] Please refer to Figures 5 to 16 In some embodiments, the controller is configured to, in the sixth secondary mode, determine a difference between the current exhaust gas superheat value and the target exhaust gas superheat value, and if the difference is greater than a preset difference, run for an eighth preset time and then re-enter the initial mode. If the difference is less than the preset difference, enter the fifth tertiary mode. The eighth preset time is set according to different models and environments, and can be input by a user, sent by a cloud, or preset by a factory.

[0129] Please refer to ​In some embodiments, the controller is configured to, in the fifth tertiary mode, judge the relationship between the target exhaust gas superheat value and the exhaust gas superheat limit value, and if the target exhaust gas superheat value is less than the exhaust gas superheat limit value, increase the compressor exhaust gas superheat. Specifically, a preset increment value is added to the compressor exhaust gas superheat value, and the compressor exhaust gas superheat value does not exceed the exhaust gas superheat limit value. And after the ninth preset time, re-enter the initial mode. The ninth preset time is set according to different models and environments, which can be input by the user, sent by the cloud, or preset by the factory.

[0130] In some embodiments, the controller is configured to, in the fifth tertiary mode, judge the relationship between the target exhaust gas superheat value and the exhaust gas superheat limit value, and if the target exhaust gas superheat value is greater than the exhaust gas superheat limit value, enter the second tertiary mode.

[0131] In some embodiments, the above-mentioned preset difference is set according to different models and environments, which can be input by the user, sent by the cloud, or preset by the factory

[0132] In some embodiments, the first adjusting member 600 and the second adjusting member 700 are electronic expansion valves. The third adjusting member 800 and the fourth adjusting member 900 are solenoid valves.

[0133] In some embodiments, when the exhaust gas superheat value of the compressor 500 exceeds the target exhaust gas superheat value, the expansion valve is opened to adjust the refrigerant sound.

[0134] In some embodiments, the throttling member 110 is a capillary tube.

[0135] The air conditioner in the present application includes but is not limited to a wall-mounted air conditioner and a floor-standing air conditioner.

[0136] Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. An air conditioner characterized by comprising: It comprises: An indoor unit; An indoor heat exchanger arranged in the indoor unit; An outdoor unit; An outdoor heat exchanger arranged in the outdoor unit; An outdoor fan for blowing air through the outdoor heat exchanger to reduce the temperature of refrigerant passing through the outdoor heat exchanger; A compressor arranged in the outdoor unit, the compressor being used to deliver refrigerant to the outdoor heat exchanger and the indoor heat exchanger; A controller configured to: calculate a refrigerant sound prediction value, if the refrigerant sound prediction value is greater than a preset refrigerant sound value, calculate a compressor suction and discharge pressure difference value; If the compressor suction and discharge pressure difference value is less than a first preset air pressure difference value, calculate the difference between the current discharge superheat value and the target discharge superheat value, and define the difference as a superheat difference value, if the superheat difference value is less than a preset difference value, determine the relationship between the target discharge superheat value and the discharge superheat limit value, if the target discharge superheat value is less than the discharge superheat limit value, increase the compressor discharge superheat.

2. The air conditioner of claim 1, wherein The indoor heat exchanger is connected and communicated with a first pipeline and a second pipeline; the outdoor heat exchanger is connected and communicated with a third pipeline and a fourth pipeline; The first pipeline is connected in parallel with the third pipeline and the fourth pipeline; The second pipeline is connected in parallel with the third pipeline and the fourth pipeline; The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are respectively provided with a first adjusting member, a second adjusting member, a third adjusting member and a fourth adjusting member; the fourth pipeline is provided with a throttling member.

3. The air conditioner of claim 2, wherein The controller is configured to: If the compressor suction and discharge pressure difference value is not less than the first preset air pressure difference value and does not exceed the second preset air pressure difference value; Determine whether the current air conditioner is in a preset mode, if not, close the second adjusting member and the third adjusting member, open the fourth adjusting member, and control the first adjusting member to a preset opening degree.

4. The air conditioner of claim 3, wherein The controller is configured to: in the controller is configured to: if the current air conditioner is in a preset mode, calculate the superheat difference value between the current discharge superheat value and the target discharge superheat value, if the superheat difference value is less than a preset difference value, increase the compressor discharge superheat.

5. The air conditioner of claim 4, wherein The controller is configured to: if the target discharge superheat value is equal to the discharge superheat limit value; determine whether the current outdoor fan speed reaches the maximum speed, if not, increase the speed of the outdoor fan.

6. The air conditioner of claim 5, wherein The controller is configured to: when the speed of the outdoor fan is increased, calculate the target frequency value of the compressor, and obtain the current frequency value of the compressor, the difference between the target frequency value of the compressor and the current frequency value of the compressor is the frequency difference value, if the frequency difference value is greater than a first preset frequency value and the frequency difference value is less than a second preset frequency value, control the current frequency value of the compressor to reach the target frequency value of the compressor.

7. The air conditioner of claim 6, wherein The controller is configured to: if the frequency difference value is greater than the second preset frequency value, increase the frequency of the compressor.

8. The air conditioner of claim 7, wherein The controller is configured to: if the compressor suction and discharge pressure difference value is greater than a second preset air pressure difference value, then open the third adjusting member and the fourth adjusting member; determine the difference value between the current discharge superheat value and the target discharge superheat value, and if the superheat difference value is less than a preset difference value, then increase the compressor discharge superheat.

9. An air conditioner characterized by comprising: It comprises: An indoor unit; An indoor heat exchanger arranged in the indoor unit; An outdoor unit; An outdoor heat exchanger arranged in the outdoor unit; A compressor arranged in the outdoor unit, the compressor being configured to deliver refrigerant to the outdoor heat exchanger and the indoor heat exchanger; A controller configured to: calculate a refrigerant sound prediction value, and if the refrigerant sound prediction value is greater than a preset refrigerant sound value, then calculate a compressor suction and discharge pressure difference value; If the compressor suction and discharge pressure difference value is less than a first preset air pressure difference value, then enter a first primary mode; If the compressor suction and discharge pressure difference value is not less than the first preset air pressure difference value and does not exceed a second preset air pressure difference value, then enter a second primary mode; If the compressor suction and discharge pressure difference value is greater than the second preset air pressure difference value, then enter a third primary mode.

10. The air conditioner of claim 9, wherein The controller is configured to: in the first primary mode, calculate the difference value between the current discharge superheat value and the target discharge superheat value, and define the difference value as a superheat difference value; If the superheat difference value is greater than a preset difference value, then enter a first secondary mode; If the superheat difference value is less than a preset difference value, then enter a second secondary mode; In the second primary mode, determine whether the current air conditioner is in a preset mode, and if not, then enter a third secondary mode; if yes, then enter a fourth secondary mode; In the third primary mode, determine whether the third adjusting member and the fourth adjusting member are open, and if not, then enter a fifth secondary mode; If yes, then enter a sixth secondary mode.

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