Air conditioner and noise treatment method of air conditioner

Abstract

The invention discloses an air conditioner and a noise processing method of the air conditioner, a compressor is arranged in a machine body of the air conditioner, and in the running process of the compressor, whether the compressor stably runs in a preset low-frequency state or not is detected; when the compressor stably operates in the preset low-frequency state, the current exhaust temperature, the current outdoor coil temperature and the current outdoor environment temperature of the air conditioner are detected; when the difference value between the exhaust temperature and the outdoor coil pipe temperature is smaller than or equal to a first temperature difference value, and the difference value between the outdoor coil pipe temperature and the outdoor environment temperature is smaller than or equal to a second temperature difference value, it is judged that the generation condition of target noise is met; wherein the target noise is noise generated when a sliding vane of the compressor makes contact with and collides with a rolling rotor. By the adoption of the method and device, the situation of noise generated by collision when the sliding piece and the sliding rotor are periodically disengaged and make reset contact can be accurately recognized, noise treatment measures can be taken in time, and the air conditioner use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner and a noise processing method for the air conditioner. Background Art

[0002] Currently, variable-frequency air conditioners have become a major market trend. Their compressor operates through three stages: intake, compression, and exhaust. The structure of a variable-frequency compressor includes vanes, a rolling rotor, and springs. During operation, when the pressure difference between intake and exhaust and the spring force are insufficient to balance the reciprocating inertia of the vanes and the friction between the vane grooves, the vane ends lose contact with the outer surface of the rolling rotor. At a certain rotation angle, the vane ends separate from the outer surface of the rolling rotor, generating a clashing noise upon re-engagement. This high-frequency noise, significantly different from the low-frequency noise of compressor operation, can be disruptive to users, particularly when opening windows, creating a harsh noise that can lead to complaints. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide an air conditioner and a noise processing method for the air conditioner, which can accurately identify the noise generated by the collision when the sliding vane and the sliding rotor of the air conditioner periodically disengage and return to contact, which is conducive to taking timely noise processing measures and improving the user's air conditioning experience.

[0004] To achieve the above object, an embodiment of the present invention provides an air conditioner, comprising:

[0005] body;

[0006] A compressor is provided in the machine body, the compressor comprising a sliding vane and a rolling rotor, and the compressor is used to perform suction, compression and exhaust operations during startup;

[0007] A controller configured to:

[0008] During the operation of the compressor, detecting whether the compressor is stably operating in a preset low-frequency state;

[0009] When the compressor is stably operating in a preset low-frequency state, detecting the current exhaust temperature, outdoor coil temperature and outdoor ambient temperature of the air conditioner;

[0010] When the difference between the exhaust temperature and the outdoor coil temperature is less than or equal to a first temperature difference, and the difference between the outdoor coil temperature and the outdoor ambient temperature is less than or equal to a second temperature difference, it is determined that the conditions for generating target noise are met; wherein the target noise is the noise caused by contact and collision between the sliding vane and the rolling rotor.

[0011] As an improvement to the above solution, during the operation of the compressor, detecting whether the compressor is stably operating in a preset low-frequency state includes:

[0012] During the operation of the compressor, detecting the operating frequency of the compressor;

[0013] When the operating frequency of the compressor is 10 - 20 Hz and the continuous operation time is greater than or equal to the preset duration, it is determined that the compressor has stably operated in the preset low-frequency state.

[0014] As an improvement to the above solution, after determining that the generation condition of the target noise is met, the controller is further configured to:

[0015] Adjust the operating state of the air conditioner to avoid generating the target noise.

[0016] As an improvement to the above solution, adjusting the operating state of the air conditioner to avoid generating the target noise includes:

[0017] Increasing the pressure difference between the suction and discharge of the compressor to avoid generating the target noise.

[0018] As an improvement to the above solution, the pressure difference between the suction and discharge of the compressor is increased through the following steps:

[0019] Increasing the target discharge temperature of the compressor according to a preset temperature adjustment step;

[0020] Reducing the target rotational speed of the outdoor fan of the air conditioner according to a preset rotational speed adjustment step.

[0021] An embodiment of the present invention further provides a method for processing noise of an air conditioner. A compressor is provided inside the body of the air conditioner. The compressor includes a sliding vane and a rolling rotor. The compressor is used to perform suction, compression, and discharge operations when starting and operating;

[0022] The method includes:

[0023] During the operation of the compressor, detecting whether the compressor is stably operating in a preset low-frequency state;

[0024] When the compressor is stably operating in the preset low-frequency state, detecting the current discharge temperature, outdoor coil temperature, and outdoor ambient temperature of the air conditioner;

[0025] When the difference between the exhaust temperature and the outdoor coil temperature is less than or equal to the first temperature difference, and the difference between the outdoor coil temperature and the outdoor ambient temperature is less than or equal to the second temperature difference, it is determined that the generation condition of the target noise is reached; wherein, the target noise is the noise generated by the contact and impact between the sliding vane and the rolling rotor.

[0026] As an improvement of the above solution, during the operation of the compressor, detecting whether the compressor is stably operating in a preset low-frequency state includes:

[0027] During the operation of the compressor, detecting the operating frequency of the compressor;

[0028] When the operating frequency of the compressor is 10 - 20 Hz and the continuous operation time is greater than or equal to the preset duration, it is determined that the compressor has stably operated in the preset low-frequency state.

[0029] As an improvement of the above solution, after determining that the generation condition of the target noise is reached, the method further includes:

[0030] Adjusting the operating state of the air conditioner to avoid generating the target noise.

[0031] As an improvement of the above solution, adjusting the operating state of the air conditioner to avoid generating the target noise includes:

[0032] Increasing the pressure difference between the suction and exhaust of the compressor to avoid generating the target noise.

[0033] As an improvement of the above solution, the pressure difference between the suction and exhaust of the compressor is increased through the following steps:

[0034] Increasing the target exhaust temperature of the compressor according to a preset temperature adjustment step size;

[0035] Reducing the target rotational speed of the outdoor fan of the air conditioner according to a preset rotational speed adjustment step size.

[0036] Compared with the prior art, the air conditioner and the noise processing method of the air conditioner disclosed in the present invention, by real-time detecting the operating frequency of the compressor, when it is determined that the compressor is stably operating in the preset low-frequency state, further detecting the current exhaust temperature, outdoor coil temperature and outdoor ambient temperature, can effectively identify whether the air conditioner is operating in a state that will cause the sliding vane of the compressor to periodically disengage from and reset to contact with the rolling rotor, resulting in the generation of the target noise, so as to take timely measures to deal with the noise and improve the user's air conditioner usage experience. Moreover, the identification process of the target noise in the present invention depends on the improvement of the existing structure and logic algorithm of the air conditioner, without the need to additionally install hardware devices such as sensors, saving the production cost of the air conditioner. Brief Description of the Drawings

[0037] Figure 1 is a schematic structural view of an air conditioner provided by an embodiment of the present invention;

[0038] Figure 2 is a schematic structural view of a refrigeration system in an embodiment of the present invention;

[0039] Figure 3 is a partial schematic structural view of a compressor in an embodiment of the present invention;

[0040] Figure 4 is a schematic structural view of a compressor in an initial state in an embodiment of the present invention;

[0041] Figure 5 is a schematic structural view of a compressor during an air intake process in an embodiment of the present invention;

[0042] Figure 6 is a schematic structural view of a compressor during a compression process in an embodiment of the present invention;

[0043] Figure 7 is a schematic structural view of a compressor during an exhaust process in an embodiment of the present invention;

[0044] Figure 8 is a schematic view of the noise frequency of the sliding vane hitting the rolling rotor in an embodiment of the present invention;

[0045] Figure 9 is a schematic view of the first working process of a controller in an embodiment of the present invention;

[0046] Figure 10 is a schematic view of the second working process of a controller in an embodiment of the present invention;

[0047] Figure 11 is a schematic view of the third working process of a controller in an embodiment of the present invention. Detailed Description of the Invention

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0050] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0051] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0052] See Figure 1 , which is a schematic structural diagram of an air conditioner provided by an embodiment of the present invention. The embodiment of the present invention provides an air conditioner 10, which can be used to perform functions such as refrigeration, heating, and dehumidification. In an optional embodiment, the air conditioner is a split-type air conditioner. The split-type air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes a blowing device such as an air outlet. The outdoor unit includes a refrigeration system composed of components such as a compressor, an evaporator, and a condenser. The specific structures and working principles of the indoor unit and the outdoor unit of the split-type air conditioner can refer to the prior art and will not be elaborated herein.

[0053] Specifically, a refrigeration system 11 is provided inside the body of the air conditioner. See Figure 2 , which is a schematic structural diagram of the refrigeration system in an embodiment of the present invention. The refrigeration system includes components such as a compressor 111, an outdoor heat exchanger 112, a throttling component 113, and an indoor heat exchanger 114. Through the refrigeration system, the refrigerant is transported in different directions, so as to enter the refrigeration mode or the heating mode to achieve the refrigeration function or the heating function.

[0054] The compressor 111 in the embodiment of the present invention is a variable-frequency compressor. See Figure 3, which is a partial structural schematic diagram of the compressor in an embodiment of the present invention. The compressor 111 includes a cylinder, a sliding vane, a rolling rotor, a spring, a sliding vane groove, an exhaust port, and a suction port. Among them, the inner wall of the cylinder acts as a stator, the rolling rotor is placed inside the cylinder, a sliding vane groove for accommodating the sliding vane is also provided in the cylinder, one end of the sliding vane abuts against the rolling rotor, and the other end of the sliding vane is fixed to the upper cover by the spring. A sealed chamber is formed among the sliding vane, the rolling rotor, and the inner wall of the cylinder. The compressor 111 is used to perform the operations of suction, compression, and exhaust when starting and running.

[0055] Specifically, referring to Figures 4 to 7 , Figure 4 is a structural schematic diagram of the compressor in the initial state in an embodiment of the present invention, Figure 5 is a structural schematic diagram of the compressor during the suction process in an embodiment of the present invention, Figure 6 is a structural schematic diagram of the compressor during the compression process in an embodiment of the present invention, Figure 7 is a structural schematic diagram of the compressor during the exhaust process in an embodiment of the present invention. When the compressor starts and runs, it first sucks air through the suction port. During the suction process, the rolling rotor starts to rotate and is in close contact with the inner wall of the cylinder. At this time, the suction port on the cylinder wall opens, and gas enters the internal sealed space formed by the sliding vane, the stator (i.e., the inner wall of the cylinder), the rolling rotor, and the upper and lower end covers. In the compression stage, the compressor starts to compress the gas, and the gas is compressed in the sealed space formed by the sliding vane, the stator, the rolling rotor, and the upper and lower cylinder covers. As the rolling rotor rotates, the gas is gradually compressed and pushed forward. During the compression process, the temperature and pressure of the gas gradually increase. When the gas is compressed to a certain extent, the exhaust port of the compressor opens, and the gas is discharged from the compressor through the exhaust port. During the exhaust process, when the gas is discharged from the compressor through the exhaust port, it will take away a part of the heat, so the temperature of the compressor will decrease. During this process, the sliding vane is subjected to various acting forces such as the gas pressure outside the cylinder and the spring force acting on the internal pressure of the cylinder, the external pressure of the internal gas in the cylinder, the inertial force of the sliding vane, and the frictional force between the sliding vane and the sliding vane groove.

[0056] It should be noted that during the operation of the air conditioner, as the room load decreases, the operating frequency of the compressor will gradually decrease. When the operating frequency of the compressor decreases to a certain range, due to the decrease in load, during the operation of the compressor, due to the insufficient pressure difference between suction and exhaust and the spring force to balance the reciprocating inertial force of the sliding vane and the frictional force between the sliding vane grooves, the end of the sliding vane cannot always maintain contact with the outer surface of the rolling rotor, and the end of the sliding vane will be separated from the outer surface of the rolling rotor at a certain rotation angle and collide when contacting again, thus generating a rattling noise.

[0057] See Figure 8 , which is a schematic diagram of the noise frequency of the sliding vane hitting the rolling rotor in an embodiment of the present invention. The frequency of the noise generated by the impact of the end of the sliding vane on the outer circumferential surface of the rolling rotor mainly concentrates in the range of 2000 - 7000 hz. This kind of noise frequency is relatively high, which is very different from the low-frequency noise during the operation of the compressor. When the user opens the window, it will generate a harsh noise, affecting the user experience. Therefore, it is necessary to identify the generation conditions of this noise in advance so as to take corresponding measures in time to eliminate the generation of the target noise.

[0058] To solve the above problems, in the embodiment of the present invention, the air conditioner 10 further includes a controller 12, which is used to identify the target noise generated by the periodic detachment and reset contact of the sliding vane and the rolling rotor. See Figure 9 , which is a schematic diagram of the first working process of the controller in an embodiment of the present invention. The controller 12 is configured to execute steps S11 to S13:

[0059] S11. During the operation of the compressor, detect whether the compressor is stably operating in a preset low-frequency state;

[0060] S12. When the compressor is stably operating in a preset low-frequency state, detect the current exhaust temperature, outdoor coil temperature, and outdoor ambient temperature of the air conditioner;

[0061] S13. When the difference between the exhaust temperature and the outdoor coil temperature is less than or equal to the first temperature difference, and the difference between the outdoor coil temperature and the outdoor ambient temperature is less than or equal to the second temperature difference, it is determined that the generation conditions of the target noise are met; wherein, the target noise is the noise generated by the contact and impact of the sliding vane and the rolling rotor.

[0062] According to the above analysis, it can be known that the rattling noise generated by the sliding vane and the rolling rotor usually occurs during the low-frequency operation of the compressor. In the embodiment of the present invention, during the operation of the compressor 111, first, it is detected in real time whether the compressor 111 is stably operating in a preset low-frequency state. When it is determined that the compressor 111 is stably operating in a preset low-frequency state, further detect the current exhaust temperature T p of the air conditioner, the outdoor coil temperature T c and the outdoor ambient temperature T oit to determine whether the generation conditions of the target noise are met.

[0063] Specifically, when it is determined that the compressor 111 is stably operating in a preset low-frequency state, it is detected whether the following conditions are simultaneously met:

[0064] Condition 1: The exhaust temperature T p and the outdoor coil temperature T cThe difference is less than or equal to the first temperature difference ΔT1, that is, T p ≤T c +ΔT1.

[0065] Condition 2: The difference between the outdoor coil temperature T c and the outdoor ambient temperature T out is less than or equal to the second temperature difference ΔT2, that is, T c ≤T out +ΔT2.

[0066] When the condition T p ≤T c +ΔT1 is satisfied, it can be concluded that the exhaust temperature T p is close to the outdoor coil temperature T c , and the bottom temperature of the compressor is close to the coil temperature. It can be speculated that there is a serious liquid return problem in the air conditioner at this time, resulting in insufficient superheat at the compressor inlet. When the condition T c ≤T out +ΔT2 is satisfied, it indicates that the outdoor coil temperature T c is close to the outdoor ambient temperature T out , and the system load is low. When the above conditions are simultaneously satisfied, it can be determined that the operating load of the air conditioner is low, the suction and discharge pressure difference is low, and the suction and discharge pressure difference and the spring force are not sufficient to balance the reciprocating inertia force of the sliding vane and the friction force between the sliding vane groove, resulting in a rattling sound when the sliding vane periodically detaches from and re-engages with the rolling rotor, that is, the generation condition of the target noise is reached.

[0067] It should be noted that the first temperature difference ΔT1 and the second temperature difference ΔT2 are preset. In the actual application process, they can be set and adjusted according to the actual situation, and no specific limitation is made here.

[0068] As a preferred embodiment, on the basis of the above embodiment, the present invention embodiment is further implemented. Then step S11, that is, during the operation of the compressor, detecting whether the compressor is stably operating in a preset low-frequency state, includes:

[0069] S111. During the operation of the compressor, detecting the operating frequency of the compressor;

[0070] S112. When the operating frequency of the compressor is 10 - 20 Hz and the continuous operation time is greater than or equal to the preset duration, it is determined that the compressor has stably operated in the preset low-frequency state.

[0071] In an embodiment of the present invention, during the operation of the compressor 111, the operating frequency of the compressor 111 is detected in real time. When the operating frequency of the compressor 111 is between 10 and 20 Hz, it is considered that the compressor is operating in a low-frequency state. Further, the continuous operation duration of the compressor 111 in the low-frequency state is detected, and a preset duration t1 is preset to represent the magnitude of the continuous operation duration. It is judged whether the continuous operation duration of the compressor 111 between 10 and 20 Hz satisfies t > t1, so as to judge whether the compressor has been stably operating in the low-frequency state for a long time. When the continuous operation duration satisfies t > t1, it is determined that the compressor has stably operated in the preset low-frequency state.

[0072] It should be noted that the preset duration t1 is preset and can be set and adjusted according to actual situations during actual application, and no specific limitation is made here.

[0073] By adopting the technical means of the embodiment of the present invention, through the detection of the operating frequency, exhaust temperature, outdoor coil temperature and outdoor ambient temperature of the compressor, it is effectively identified whether the air conditioner is operating in an operating state that will cause the impeller of the compressor to periodically disengage from and reset in contact with the rolling rotor, resulting in the generation of target noise, so as to take timely measures to deal with the noise and improve the user's air conditioner usage experience. Moreover, the identification process of the target noise in the present invention depends on the improvement of the existing structure and logic algorithm of the air conditioner, without the need to additionally install hardware devices such as sensors, saving the production cost of the air conditioner.

[0074] As a preferred embodiment, the embodiment of the present invention is further implemented on the basis of any of the above embodiments. Refer to Figure 10 , which is the schematic diagram of the second working process of the controller in the embodiment of the present invention. In step S13, that is, after it is determined that the generation condition of the target noise is reached, the controller is further configured to execute step S14:

[0075] S14. Adjust the operating state of the air conditioner to avoid generating the target noise.

[0076] In an embodiment of the present invention, when it is recognized according to the means of the above embodiment that the current operating state of the air conditioner satisfies the generation condition of the target noise, the operating state of the air conditioner is adjusted in time to avoid the generation of the target noise.

[0077] Preferably, step S14, that is, adjusting the operating state of the air conditioner to avoid generating the target noise, includes:

[0078] Increasing the pressure difference between the suction and discharge of the compressor to avoid generating the target noise.

[0079] It should be noted that the rattling sound generated when the sliding vane and the rolling rotor are periodically separated and reset in contact is due to the fact that when the air conditioner is in a specific operating state, the suction and discharge pressure difference is too low, resulting in the suction and discharge pressure difference and the spring force being insufficient to balance the reciprocating inertia force of the sliding vane and the frictional force between the sliding vane groove.

[0080] Therefore, in the embodiment of the present invention, by adjusting the operating state of the air conditioner, increasing the air pressure difference between the suction and discharge of the compressor 111, the sum of the suction and discharge pressure difference and the spring force of the air conditioner is greater than the reciprocating inertia force of the sliding vane and the frictional force between the sliding vane groove, so as to ensure that the sliding vane will not be separated from the rolling rotor and the rattling sound caused by the impact between the sliding vane and the rolling rotor will not be generated.

[0081] Optionally, for an air conditioner with adjustable opening degree, the pressure difference before and after throttling can be adjusted by adjusting the opening degree, increasing the suction and discharge pressure difference, so as to ensure that the sliding vane will not be separated from the rolling rotor and the rattling sound caused by the impact between the sliding vane and the rolling rotor will not be generated.

[0082] As a preferred embodiment, see Figure 11 , which is the schematic diagram of the third working process of the controller in the embodiment of the present invention. The air pressure difference between the suction and discharge of the compressor is increased through the following steps:

[0083] Increase the target discharge temperature of the compressor according to the preset temperature adjustment step size.

[0084] Reduce the target speed of the outdoor fan of the air conditioner according to the preset speed adjustment step size.

[0085] In the embodiment of the present invention, the generation of the target noise is eliminated by controlling the operating parameters of the air conditioner as follows.

[0086] First, appropriately increase the target discharge temperature of the compressor 111. Increase the target discharge temperature of the compressor according to the preset temperature adjustment step size ΔT3, so that T p = T p_set +ΔT3, where T p_set is the preset target discharge temperature, thereby controlling the opening degree of the expansion valve, reducing the opening degree of the expansion valve, and increasing the suction and discharge pressure difference.

[0087] Second, appropriately reduce the speed of the outdoor fan. Increase the target speed of the outdoor fan of the air conditioner according to the preset speed adjustment step size ΔN, so that N = N set -ΔN, where N set is the preset target speed of the outdoor fan, reducing the heat dissipation outdoors, increasing the temperature and pressure of the condenser, and further increasing the suction and discharge pressure difference.

[0088] It should be noted that the temperature adjustment step ΔT3 is preset and can be set and adjusted according to actual conditions during actual application, and specific limitations are not made here.

[0089] By using the technical means of the embodiments of the present invention, by controlling parameters such as the operating frequency, the rotational speed of the outdoor fan, and the valve opening degree of the air conditioner at low frequency and low load, the suction and discharge pressure difference of the air conditioner can be increased, so that the sum of the suction and discharge pressure difference of the air conditioner and the spring force is greater than the reciprocating inertia force of the sliding vane and the friction force between the sliding vane groove, thereby ensuring that the sliding vane will not disengage from the rolling rotor, and thus the rattling sound caused by the periodic disengagement and reset contact between the sliding vane and the rolling rotor will not be generated, improving the user experience and reducing user complaints.

[0090] The embodiments of the present invention also provide a noise processing method for an air conditioner. A compressor is provided in the body of the air conditioner. The compressor includes a sliding vane and a rolling rotor, and the compressor is used to perform suction, compression, and exhaust operations when starting and running.

[0091] The noise processing method of the air conditioner includes steps S21 to S23:

[0092] S21. During the operation of the compressor, detect whether the compressor is stably operating in a preset low-frequency state;

[0093] S22. When the compressor is stably operating in a preset low-frequency state, detect the current exhaust temperature, outdoor coil temperature, and outdoor ambient temperature of the air conditioner;

[0094] S23. When the difference between the exhaust temperature and the outdoor coil temperature is less than or equal to a first temperature difference, and the difference between the outdoor coil temperature and the outdoor ambient temperature is less than or equal to a second temperature difference, it is determined that the generation condition of the target noise is reached; wherein, the target noise is the noise generated by the contact and impact between the sliding vane and the rolling rotor.

[0095] It should be noted that during the operation of the air conditioner, as the room load decreases, the operating frequency of the compressor will gradually decrease. When the operating frequency of the compressor decreases to a certain range, due to the decrease in load, during the operation of the compressor, due to the suction and discharge pressure difference and the spring force being insufficient to balance the reciprocating inertia force of the sliding vane and the friction force between the sliding vane groove, the end of the sliding vane cannot always maintain contact with the outer surface of the rolling rotor, and the end of the sliding vane disengages from the outer surface of the rolling rotor at a certain rotation angle and collides when contacting again, thereby generating a rattling noise.

[0096] To solve the above problems, the noise processing method of the air conditioner provided by the embodiments of the present invention is used to identify the target noise generated by the periodic detachment and reset contact of the sliding vane and the rolling rotor, so as to take response measures in time to eliminate the generation of the target noise.

[0097] In the embodiments of the present invention, during the operation of the compressor, it is first detected in real time whether the compressor is stably operating in a preset low-frequency state. When it is determined that the compressor is stably operating in the preset low-frequency state, further detect the current exhaust temperature T of the air conditioner p , outdoor coil temperature T c and outdoor ambient temperature T out to determine whether the generation conditions of the target noise are met.

[0098] Specifically, when it is determined that the compressor is stably operating in the preset low-frequency state, it is detected whether the following conditions are simultaneously met:

[0099] Condition 1: The difference between the exhaust temperature T p and the outdoor coil temperature T c is less than or equal to the first temperature difference ΔT1, that is, T p ≤ T c + ΔT1.

[0100] Condition 2: The difference between the outdoor coil temperature T c and the outdoor ambient temperature T out is less than or equal to the second temperature difference ΔT2, that is, T c ≤ T out + ΔT2.

[0101] When the condition T p ≤ T c + ΔT1 is met, it can be concluded that the exhaust temperature T p is close to the outdoor coil temperature T c , and the temperature at the bottom of the compressor is close to the coil temperature. It can be inferred that there is a serious liquid return problem in the air conditioner at this time, resulting in insufficient superheat under the pressure of the air conditioner. When the condition T c ≤ T out + ΔT2 is met, it indicates that the outdoor coil temperature T c is close to the outdoor ambient temperature T out , and the system load is low. When the above conditions are simultaneously met, it can be determined that the operating load of the air conditioner is low, the suction and discharge pressure difference is low, and the suction and discharge pressure difference and the spring force are not sufficient to balance the reciprocating inertia force of the sliding vane and the friction force between the sliding vane groove, resulting in a rattling sound when the sliding vane and the rolling rotor are periodically detached and reset in contact, that is, the generation conditions of the target noise are reached.

[0102] As a preferred embodiment, based on the above embodiments, the embodiment of the present invention is further implemented. Then, step S21, that is, during the operation of the compressor, detecting whether the compressor is stably operating in a preset low-frequency state, includes:

[0103] S211. During the operation of the compressor, detecting the operating frequency of the compressor;

[0104] S212. When the operating frequency of the compressor is 10 - 20 Hz and the continuous operation time is greater than or equal to the preset duration, it is determined that the compressor has stably operated in the preset low-frequency state.

[0105] In the embodiment of the present invention, during the operation of the compressor, the operating frequency of the compressor is detected in real time. When the operating frequency of the compressor is between 10 - 20 Hz, it is considered that the compressor is operating in a low-frequency state. Further, detecting the continuous operation duration of the compressor in the low-frequency state, and presetting a preset duration t1 to represent the magnitude of the continuous operation duration, and determining whether the continuous operation duration of the compressor between 10 - 20 Hz satisfies t > t1, so as to determine whether the compressor has stably operated in the low-frequency state for a long time. When the continuous operation duration satisfies t > t1, it is determined that the compressor has stably operated in the preset low-frequency state.

[0106] By adopting the technical means of the embodiment of the present invention, through the detection of the operating frequency, exhaust temperature, outdoor coil temperature, and outdoor ambient temperature of the compressor, it is possible to effectively identify whether the air conditioner is operating in an operating state that will cause the sliding vane of the compressor to periodically disengage from and reset to contact with the rolling rotor, resulting in the generation of the target noise, so as to take timely measures to deal with the noise and improve the user's air conditioner usage experience. Moreover, the identification process of the target noise in the present invention depends on the improvement of the existing structure and logic algorithm of the air conditioner, without the need to additionally install hardware devices such as sensors, saving the production cost of the air conditioner.

[0107] As a preferred embodiment, based on any of the above embodiments, the embodiment of the present invention is further implemented. In step S23, that is, after determining that the generation condition of the target noise is reached, the controller is further configured to execute step S24:

[0108] S24. Adjust the operating state of the air conditioner to avoid generating the target noise.

[0109] In the embodiment of the present invention, when it is recognized according to the means of the above embodiment that the current operating state of the air conditioner satisfies the generation condition of the target noise, the operating state of the air conditioner is adjusted in a timely manner, thereby avoiding the generation of the target noise.

[0110] Preferably, step S24, that is, adjusting the operating state of the air conditioner to avoid generating the target noise, includes:

[0111] Increasing the pressure difference between the suction and discharge of the compressor to avoid generating the target noise.

[0112] In the embodiment of the present invention, by adjusting the operating state of the air conditioner and increasing the pressure difference between the suction and discharge of the compressor, the sum of the suction and discharge pressure difference and the spring force of the air conditioner is greater than the reciprocating inertia force of the sliding vane and the friction force between the sliding vane grooves, so as to ensure that the sliding vane will not separate from the rolling rotor, and the rattling sound caused by the impact of the sliding vane and the rolling rotor will not be generated.

[0113] Optionally, for an air conditioner with adjustable opening, the pressure difference before and after throttling can be adjusted by adjusting the opening to increase the suction and discharge pressure difference of the compressor.

[0114] As a preferred implementation manner, the pressure difference between the suction and discharge of the compressor is increased through the following steps:

[0115] Increasing the target discharge temperature of the compressor according to a preset temperature adjustment step size;

[0116] Reducing the target speed of the outdoor fan of the air conditioner according to a preset speed adjustment step size.

[0117] In the embodiment of the present invention, first, appropriately increase the target discharge temperature of the compressor. According to the preset temperature adjustment step size ΔT3, increase the target discharge temperature of the compressor so that T p = T p_set + ΔT3, where T p_set is the preset target discharge temperature, thereby controlling the opening of the expansion valve to reduce the opening of the expansion valve and increase the suction and discharge pressure difference. Second, appropriately reduce the speed of the outdoor fan. According to the preset speed adjustment step size ΔN, increase the target speed of the outdoor fan of the air conditioner so that N = N set - ΔN, where N set is the preset target speed of the outdoor fan, so that the heat dissipation outdoors is reduced, the temperature and pressure of the condenser are increased, and the suction and discharge pressure difference is further increased.

[0118] By adopting the technical means of the embodiments of the present invention, by controlling parameters such as the operating frequency, the rotational speed of the outdoor fan, and the valve opening degree of the air conditioner at low frequency and low load, the suction and discharge pressure difference of the air conditioner can be increased, so that the sum of the suction and discharge pressure difference of the air conditioner and the spring force is greater than the reciprocating inertia force of the sliding vane and the friction force between the sliding vane groove, thereby ensuring that the sliding vane will not separate from the rolling rotor, and thus the rattling sound caused by the periodic separation and reset contact between the sliding vane and the rolling rotor will not be generated, improving the user experience and reducing user complaints.

[0119] It should be noted that a noise processing method of an air conditioner provided by the embodiments of the present invention is the same as all the flow steps executed by a controller of an air conditioner in the above embodiments, and the working principles and beneficial effects of the two correspond one by one, so details will not be repeated here.

[0120] The embodiments of the present invention also provide a noise processing device for an air conditioner, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the noise processing method of the air conditioner as described in any one of the above embodiments is implemented.

[0121] The embodiments of the present invention also provide a computer-readable storage medium, which includes a stored computer program. When the computer program runs, it controls the device where the computer-readable storage medium is located to execute the noise processing method of the air conditioner as described in any one of the above embodiments.

[0122] The embodiments of the present invention also provide a computer program product, which includes a computer program or computer instructions. When the computer program or the computer instructions are executed by a processor, the noise processing method of the air conditioner as described in any one of the above embodiments is implemented.

[0123] Those of ordinary skill in the art can understand that all or part of the processes of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0124] The above is the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. An air conditioner, characterized in that, Comprising: A body; A compressor disposed within the body, the compressor including a sliding vane and a rolling rotor, the compressor being configured to perform suction, compression, and exhaust operations during startup and operation; A controller configured to: During the operation of the compressor, detect whether the compressor is stably operating in a preset low-frequency state; When the compressor is stably operating in the preset low-frequency state, detect the current exhaust temperature, outdoor coil temperature, and outdoor ambient temperature of the air conditioner; When the difference between the exhaust temperature and the outdoor coil temperature is less than or equal to a first temperature difference, and the difference between the outdoor coil temperature and the outdoor ambient temperature is less than or equal to a second temperature difference, determine that the generation condition of the target noise is met; wherein, the target noise is the noise generated by the contact and impact between the sliding vane and the rolling rotor.

2. The air conditioner according to claim 1, wherein The step of detecting whether the compressor is stably operating in the preset low-frequency state during the operation of the compressor includes: During the operation of the compressor, detect the operating frequency of the compressor; When the operating frequency of the compressor is 10 - 20 Hz and the continuous operation time is greater than or equal to the preset duration, determine that the compressor has stably operated in the preset low-frequency state.

3. The air conditioner according to claim 1 or 2, characterized in that After determining that the generation condition of the target noise is met, the controller is further configured to: Adjust the operating state of the air conditioner to avoid generating the target noise.

4. The air conditioner according to claim 3, wherein, The step of adjusting the operating state of the air conditioner to avoid generating the target noise includes: Increase the pressure difference between the suction and exhaust of the compressor to avoid generating the target noise.

5. The air conditioner according to claim 4, characterized in that, Increase the pressure difference between the suction and exhaust of the compressor through the following steps: Increase the target exhaust temperature of the compressor according to a preset temperature adjustment step size; Reduce the target rotational speed of the outdoor fan of the air conditioner according to a preset rotational speed adjustment step size.

6. A noise processing method for an air conditioner, characterized in that, A compressor is disposed within the body of the air conditioner, the compressor including a sliding vane and a rolling rotor, the compressor being configured to perform suction, compression, and exhaust operations during startup and operation; The method includes: During the operation of the compressor, detect whether the compressor is stably operating in a preset low-frequency state; When the compressor is stably operating in the preset low-frequency state, detect the current exhaust temperature, outdoor coil temperature, and outdoor ambient temperature of the air conditioner; When the difference between the exhaust temperature and the outdoor coil temperature is less than or equal to a first temperature difference, and the difference between the outdoor coil temperature and the outdoor ambient temperature is less than or equal to a second temperature difference, determine that the generation condition of the target noise is met; wherein, the target noise is the noise generated by the contact and impact between the sliding vane and the rolling rotor.

7. The noise processing method of the air conditioner according to claim 6, characterized in that, The step of detecting whether the compressor is stably operating in the preset low-frequency state during the operation of the compressor includes: During the operation of the compressor, detect the operating frequency of the compressor; When the operating frequency of the compressor is 10 - 20 Hz and the continuous operation time is greater than or equal to the preset duration, determine that the compressor has stably operated in the preset low-frequency state.

8. The noise processing method of the air conditioner according to claim 6 or 7, characterized in that, After determining that the generation condition of the target noise is met, the method further includes: Adjust the operating state of the air conditioner to avoid generating the target noise.

9. The noise processing method of the air conditioner according to claim 8, characterized in that, The adjustment of the operating state of the air conditioner to avoid generating the target noise includes: Increase the pressure difference between the suction and discharge of the compressor to avoid generating the target noise.

10. The noise processing method of the air conditioner according to claim 9, characterized in that, Increase the pressure difference between the suction and discharge of the compressor through the following steps: Increase the target discharge temperature of the compressor according to a preset temperature adjustment step size; Reduce the target rotational speed of the outdoor fan of the air conditioner according to a preset rotational speed adjustment step size.

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