Air conditioning system, control method for reducing refrigerant flow noise, and regulating device

Abstract

This application provides an air conditioning system, a control method, and an adjustment device for reducing refrigerant flow noise. This relates to the technical field of air conditioning vibration and noise reduction, and is used to reduce the refrigerant flow noise generated during the startup of an air conditioning system. This application introduces a bypass pipe to adjust the gas pressure difference before and after the electronic expansion valve. This pressure reduction reduces the excitation force exerted by the gaseous refrigerant on the valve needle inside the electronic expansion valve, thereby reducing the high-frequency noise radiated by the valve needle vibration, namely the refrigerant flow noise, and improving the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning vibration reduction and noise reduction, and in particular to an air-conditioning system, a control method for reducing refrigerant flow noise, and an adjusting device. Background Art

[0002] With rising living standards, air conditioning systems have become ubiquitous in households. Users not only demand excellent cooling and heating performance but also prioritize user comfort. Noise reduction is a crucial aspect of improving air conditioning system comfort. Air conditioning system noise generally consists of wind noise and refrigerant flow noise. With the continuous advancement of silent air conditioning system design, wind noise is becoming increasingly quiet, making refrigerant flow noise increasingly noticeable. Therefore, addressing this issue has become crucial.

[0003] Refrigerant flow sound is mainly produced in heating mode. By analyzing the refrigerant flow sound generated during the startup of the heating mode, it is concluded that the refrigerant flow sound generated during the startup of the heating mode is mainly because the valve needle inside the electronic expansion valve is subjected to the excitation force of the gaseous refrigerant, and the vibration of the valve needle will radiate high-frequency noise, thereby generating refrigerant flow sound.

[0004] Therefore, how to change the excitation force on the valve needle inside the electronic expansion valve to effectively reduce the refrigerant flow noise has become an urgent problem to be solved. Summary of the Invention

[0005] The present invention provides an air conditioning system, a control method for reducing refrigerant flow noise, and an adjustment device for reducing the refrigerant flow noise caused by the excitation force exerted on the valve needle inside the electronic expansion valve during the startup of the air conditioning system, thereby improving the user experience.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] According to a first aspect of an embodiment of the present application, an air conditioning system is provided. The air conditioning system includes at least one indoor unit and an outdoor unit connected to the indoor unit. The indoor unit includes a regulating device and a controller connected to the regulating device. The regulating device includes: an electronic expansion valve, a bypass pipe, and a one-way valve. The bypass pipe is provided on one side of an inlet pipe of the electronic expansion valve. The one-way valve is provided on the bypass pipe, and an outlet of the one-way valve is adjacent to the electronic expansion valve. The controller is configured to perform:

[0008] In response to the mode control instruction, reading the mode carried by the mode control instruction;

[0009] If the mode is heating mode, open the one-way valve.

[0010] In combination with the first implementation of the first aspect, the step of opening the one-way valve includes: reading the status of the indoor unit; if the indoor unit is in the off state, setting the opening of the electronic expansion valve to the first opening, and opening the one-way valve.

[0011] In combination with the second implementation method of the first aspect, the step of opening the one-way valve also includes: if the indoor unit is in working state, setting the opening of the electronic expansion valve to a second opening, the second opening is greater than the first opening; after the first set time, opening the one-way valve.

[0012] In combination with the third implementation of the first aspect, the air-conditioning system further includes a compressor, and after the step of reading the indoor unit status, the controller is further configured to: start the compressor after a first set time.

[0013] In conjunction with the fourth implementation of the first aspect, after the step of starting the compressor, the controller is further configured to:

[0014] Read the frequency of the compressor;

[0015] If the frequency of the compressor is equal to the set frequency, the check valve is closed.

[0016] In combination with the fifth implementation of the first aspect, the controller is further configured to: if the mode is other modes, the other modes are modes different from the heating mode; set the opening of the electronic expansion valve to the second opening.

[0017] In combination with the sixth implementation of the first aspect, after the step of setting the opening of the electronic expansion valve to the second opening, the controller is further configured to: start the compressor after a second set time.

[0018] The air conditioning system provided in an embodiment of the present application adds a bypass pipe and a one-way valve to the electronic expansion valve of the indoor unit of the air conditioning system. During the startup process of the air conditioning system, the electronic expansion valve and the one-way valve can be opened to balance the pressure difference before and after the electronic expansion valve. During the startup process of the air conditioning system, the pressure and temperature of various parts of the system are unstable. The refrigerant entering the electronic expansion valve is mostly in a two-phase state, with gas and liquid coexisting. Because the electronic expansion valve is a throttling component, the refrigerant flow cross-section suddenly expands at the outlet of the electronic expansion valve, and the two-phase refrigerant forms a vortex zone, generating a large number of bubbles. The bursting of bubbles at high pressure is the main cause of the refrigerant flow noise at the outlet of the electronic expansion valve. After the bypass pipe and the one-way valve are introduced, the vortex volume inside the electronic expansion valve is significantly reduced, thereby reducing the refrigerant flow noise.

[0019] A second aspect of the embodiments of the present application further provides a control method for reducing refrigerant flow noise, applicable to an air conditioning system, the air conditioning system including at least one indoor unit, the indoor unit including a regulating device and a controller connected to the regulating device, the regulating device including: an electronic expansion valve, a bypass pipe, and a one-way valve; the bypass pipe is provided on one side of an inlet pipe of the electronic expansion valve, the one-way valve is provided on the bypass pipe, and an outlet of the one-way valve is adjacent to the electronic expansion valve; the control method includes:

[0020] In response to the mode control instruction, reading the mode carried by the mode control instruction;

[0021] If the mode is heating mode, open the one-way valve.

[0022] In combination with the first implementation of the second aspect, the step of opening the one-way valve includes: reading the status of the indoor unit; if the indoor unit is in the closed state, setting the opening of the electronic expansion valve to the first opening, and opening the one-way valve.

[0023] In combination with the second implementation method of the second aspect, the step of opening the one-way valve also includes: if the indoor unit is in working state, setting the opening of the electronic expansion valve to a second opening, the second opening is greater than the first opening; after the first set time, opening the one-way valve.

[0024] In combination with the third implementation of the second aspect, the air-conditioning system further includes a compressor. After the step of reading the indoor unit status, the controller is further configured to: start the compressor after a first set time.

[0025] In conjunction with the fourth implementation of the second aspect, after the step of starting the compressor, the controller is further configured to:

[0026] Read the frequency of the compressor;

[0027] If the frequency of the compressor is equal to the set frequency, the check valve is closed.

[0028] In combination with the fifth implementation of the second aspect, the controller is further configured to: if the mode is other modes, the other modes are modes different from the heating mode; set the opening of the electronic expansion valve to the second opening.

[0029] In combination with the sixth implementation manner of the second aspect, after the step of setting the opening of the electronic expansion valve to the second opening, the controller is further configured to: start the compressor after a second set time.

[0030] The control method provided in the embodiment of the present application can determine the opening degree of the electronic expansion valve and the opening time of the one-way valve according to the operating mode of the air-conditioning system and the operating status of the indoor unit. It can effectively reduce the refrigerant flow noise generated during the startup of the air-conditioning system. During the startup of the air-conditioning system, the refrigerant flow gas in the unpowered indoor unit accounts for a large proportion because the indoor unit fan does not operate for heat exchange, and the electronic expansion valve is greatly stimulated at the moment the compressor starts. Therefore, when the heating mode of the air-conditioning system is started, the one-way valve of the unpowered indoor unit is opened first to adjust the pressure difference before and after the electronic expansion valve, so as to avoid a large impact of the refrigerant flow gas on the electronic expansion valve at the moment the compressor starts.

[0031] A third aspect of the present application further provides a control device for reducing refrigerant flow noise, the control device being applicable to an air conditioning system, the air conditioning system including at least one indoor unit, the indoor unit including a regulating device and a controller connected to the regulating device, the regulating device including: an electronic expansion valve, a bypass pipe, and a one-way valve; the bypass pipe being arranged on one side of an inlet pipe of the electronic expansion valve, the one-way valve being arranged on the bypass pipe, and the outlet of the one-way valve being adjacent to the electronic expansion valve, the control device including:

[0032] A reading module is used to read the mode and indoor unit status carried by the mode control instruction, and is also used to read the frequency of the compressor;

[0033] The control module controls the opening of the one-way valve.

[0034] The fourth aspect of the embodiment of the present application also provides a regulating device, which is applied to the above-mentioned control device and is applicable to the indoor unit of the air-conditioning system. The regulating device includes: an electronic expansion valve, a bypass pipe and a one-way valve; the bypass pipe is arranged on one side of the inlet pipe of the electronic expansion valve, the one-way valve is arranged on the bypass pipe, and the outlet of the one-way valve is adjacent to the electronic expansion valve.

[0035] Among them, the beneficial effects described in the third and fourth aspects can refer to the beneficial effect analysis of the first or second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0037] Figure 1 A schematic structural diagram of an air conditioning system provided in an embodiment of the present application;

[0038] Figure 2 A schematic structural diagram of a refrigerant system provided in an embodiment of the present application;

[0039] Figure 3A schematic structural diagram of an adjustment device provided in an embodiment of the present application;

[0040] Figure 4 A flow chart of a control method for a regulating device provided in an embodiment of the present application;

[0041] Figure 5 A flow chart of another control method for an adjusting device provided in an embodiment of the present application;

[0042] Figure 6 A flow chart of another control method for an adjusting device provided in an embodiment of the present application;

[0043] Figure 7 A flow chart of another control method for an adjusting device provided in an embodiment of the present application;

[0044] Figure 8 A flow chart of another control method for an adjusting device provided in an embodiment of the present application;

[0045] Figure 9 A schematic structural diagram of a control device of an adjusting device provided in an embodiment of the present application;

[0046] Figure 10 A schematic structural diagram of a control device of an adjusting device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connect" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "connected" used in this application have the meaning of conducting electricity. The specific meanings need to be understood in the context.

[0050] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0051] Figure 1 The figure shows an air conditioning system provided in an embodiment of the present application. The air conditioning system may include an outdoor air conditioning unit and at least one indoor air conditioning unit. The outdoor air conditioning unit is connected to one or more indoor air conditioning units via piping. For ease of description, in the embodiment of the present application, the outdoor air conditioning unit may be referred to as the outdoor unit, and the indoor air conditioning unit may be referred to as the indoor unit.

[0052] The embodiments of the present application do not specifically limit the temperature adjustment methods of the indoor and outdoor units. As a feasible implementation method, the outdoor unit can adjust the temperature by using air cooling heat exchange. For another example, as a feasible implementation method, the indoor unit can adjust the temperature by using direct evaporative heat exchange.

[0053] The following is a further description of the air conditioning system with reference to the accompanying drawings. Figure 1 , Figure 1 A schematic structural diagram of an air-conditioning system provided in a feasible embodiment.

[0054] like Figure 1 As shown, the air conditioning system may include: a compressor 1, a four-way reversing valve 2, an outdoor unit heat exchanger 3, an outdoor fan 4, an outdoor unit electronic expansion valve (EVO) 5, a liquid side stop valve 6, an indoor unit electronic expansion valve (EVI) 7-1, a one-way valve 7-2, a bypass pipe 7-3, an indoor unit heat exchanger 8, an indoor fan 9, a gas side stop valve 10, and a gas-liquid separator 11. It should be understood that Figure 1 Only some components of the air-conditioning system are shown; the air-conditioning system may also include other components not shown.

[0055] It is worth noting that Figure 1 The example of the air-conditioning system including two indoor units is shown only. When the air-conditioning system includes two or more indoor units, it can be called a multi-split air-conditioning system. In actual application, the embodiment of the present application does not make specific restrictions on the number of indoor units included in the air-conditioning system.

[0056] In the embodiment of the present application, the compressor 1 is arranged between the four-way reversing valve 2 and the gas-liquid separator 11, and is used to compress the refrigerant and input the compressed refrigerant into the circulation system through the four-way reversing valve 2 to provide power for the circulation of the refrigerant.

[0057] The following takes the circulation of refrigerant in heating mode as an example to illustrate the function of the compressor: in heating mode, the compressor 1 can transport the compressed refrigerant to the indoor unit heat exchanger 8 through the four-way reversing valve 2.

[0058] Alternatively, the compressor 1 may be a variable capacity inverter compressor controlled based on the speed of an inverter.

[0059] In the embodiment of the present application, the four ports (C, D, S, E) of the four-way reversing valve 2 are respectively connected to the exhaust port of the compressor 1 (not shown in the figure), the outdoor unit heat exchanger 3, the gas-liquid separator 11 and the indoor unit heat exchanger of each indoor unit.

[0060] The four-way reversing valve 2 is used to realize the mutual conversion between the cooling mode and the heating mode of the air-conditioning system by changing the flow direction of the refrigerant in the system pipeline.

[0061] In this embodiment, one end of the outdoor heat exchanger 3 is connected to the compressor 1 via a four-way reversing valve 2, and the other end is connected to the indoor heat exchanger. The outdoor heat exchanger 3 is used to exchange heat between the refrigerant flowing in the heat transfer tube of the outdoor heat exchanger 3 and the outdoor air to achieve the purpose of temperature regulation.

[0062] In an embodiment of the present application, the outdoor blower 4 is connected to an outdoor fan (not shown in the figure) and is used to drive or change the speed of the outdoor fan to promote heat exchange between the refrigerant flowing in the heat transfer pipe of the outdoor unit heat exchanger 3 and the outdoor air, thereby achieving the purpose of auxiliary temperature regulation.

[0063] In the embodiment of the present application, the outdoor unit electronic expansion valve (EVO) 5 and the indoor unit electronic expansion valve (EVI) 7-1 are arranged between the indoor unit heat exchanger 8 and the outdoor unit heat exchanger 3. The outdoor unit electronic expansion valve (EVO) 5 has the function of expanding and reducing the pressure of the refrigerant flowing through the outdoor unit electronic expansion valve (EVO) 5, and can be used to adjust the flow rate of the refrigerant in the pipeline. Based on the same principle, the indoor unit electronic expansion valve (EVI) 7-1 has the function of expanding and reducing the pressure of the refrigerant flowing through the outdoor unit electronic expansion valve (EVO) 5, and can be used to adjust the flow rate of the refrigerant in the pipeline.

[0064] In the embodiment of the present application, if the electronic expansion valves (the indoor unit electronic expansion valve 7-1 and the outdoor unit electronic expansion valve 5) are opened less, the flow resistance of the refrigerant through the electronic expansion valves increases. If the electronic expansion valves are opened more, the flow resistance of the refrigerant through the electronic expansion valves decreases. In this way, even if the states of other components in the air conditioning system do not change, when the opening of the electronic expansion valves changes, the refrigerant flow rate to the indoor unit heat exchanger 8 or the outdoor unit heat exchanger 3 will also change.

[0065] It is worth noting that Figure 1 The application scenario in which the air-conditioning system includes one outdoor electronic expansion valve (EVO) 5 and two indoor electronic expansion valves (EVI) 7-1 is only shown for example. The above application scenario does not constitute a limitation. In actual application, the number of outdoor electronic expansion valves (EVO) 5 and indoor electronic expansion valves (EVI) 7-1 can be set according to needs. The applicant does not make too many restrictions here.

[0066] In the embodiment of the present application, one end of the bypass pipe 7-3 is connected to the valve body of the indoor unit electronic expansion valve (EVI) 7-1, and the other end is connected to the side of the inlet pipe of the indoor unit electronic expansion valve (EVI) 7-1.

[0067] In the embodiment of the present application, the one-way valve 7-2 is provided on the bypass pipe 7-3, and the outlet of the one-way valve 7-2 is adjacent to the indoor unit electronic expansion valve (EVI) 7-1.

[0068] In the embodiment of the present application, the liquid-side stop valve 6 is provided between the outdoor unit electronic expansion valve (EVO) 5 and the indoor unit electronic expansion valve (EVI) 7 - 1 .

[0069] In the embodiment of the present application, the indoor heat exchanger 8 is used to perform heat exchange between the refrigerant flowing in the heat transfer tube of the indoor heat exchanger 8 and the indoor air.

[0070] In an embodiment of the present application, the indoor fan 9 is connected to the indoor fan (not shown in the figure) and is used to drive or change the speed of the indoor fan to promote heat exchange between the refrigerant flowing in the heat transfer pipe of the indoor unit heat exchanger 8 and the indoor air.

[0071] In the embodiment of the present application, the gas-side stop valve 10 is arranged between the compressor assembly and the indoor unit heat exchanger 8 .

[0072] In the embodiment of the present application, the gas-liquid separator 11 is connected to the compressor 1 for separating the gaseous refrigerant and the liquid refrigerant.

[0073] In some embodiments, the air conditioning system is further provided with a remote controller that can communicate with the controller using infrared or other communication methods. The remote controller allows the user to control the air conditioning system in various ways, thereby enabling interaction between the user and the air conditioning system.

[0074] Optionally, the air conditioning system may further include a load regulating valve, a temperature sensor, a pressure sensor, an outdoor throttling device, etc., which will not be described in detail here.

[0075] Those skilled in the art will understand that Figure 1 The hardware structure shown in the figure does not constitute a limitation on the air conditioning system. The air conditioning system may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. Figure 1 The number of indoor heat exchangers 8 and indoor electronic expansion valves (EVIs) 7 - 1 shown is only an example, and the present application does not impose any specific limitation thereto.

[0076] like Figure 2 Figure 1 shows a schematic diagram of the refrigerant system in an air conditioning system. The refrigerant system primarily consists of four components: a compressor 1, an indoor heat exchanger 8, an outdoor electronic expansion valve (EVO) 5 and an indoor electronic expansion valve (EVI) 7-1, and an outdoor heat exchanger 3. These five components form a closed system through which the refrigerant circulates, absorbing and releasing heat.

[0077] Specifically, when the air conditioning system is in heating mode, the circulation process of the refrigerant system, such as Figure 2 As shown, the direction indicated by the solid arrow is the flow direction of the refrigerant in the heating mode. The compressor 1 compresses the refrigerant from the outdoor unit heat exchanger 3 and discharges the compressed refrigerant into the indoor unit heat exchanger 8. The refrigerant condenses in the indoor unit heat exchanger 8, releasing heat during the condensation process. After that, the refrigerant passes through the indoor unit electronic expansion valve (EVI) 7-1, the outdoor unit electronic expansion valve (EVO) 5, and the outdoor unit heat exchanger 3 in sequence. Due to the throttling effect of the electronic expansion valve, the pressure in the outdoor unit heat exchanger 3 is lower than the pressure in the indoor unit heat exchanger 8. The refrigerant evaporates in the outdoor unit heat exchanger 3, absorbing heat during the evaporation process, completing the cycle.

[0078] When the air conditioner is in cooling mode, the flow direction of the refrigerant is opposite to that in the heating state (the direction indicated by the dotted arrow is the flow direction of the refrigerant in cooling mode), completing the circulation process.

[0079] Refrigerant flow noise is easy to produce in heating mode. Figure 3 As shown, in heating mode, the refrigerant flows from the inlet pipe of the electronic expansion valve to the outlet pipe ( Figure 3 The solid arrow indicates the direction of refrigerant flow in heating mode). Due to the internal structure of the electronic expansion valve, the valve needle is in a vertical direction. When the refrigerant flows from the inlet pipe into the electronic expansion valve, it will directly hit the top of the electronic expansion valve needle, causing the valve needle to vibrate and produce refrigerant flow sound. In cooling mode, the refrigerant flows in the opposite direction ( Figure 3 The direction indicated by the dotted arrow is the flow direction of the refrigerant in the cooling mode. The refrigerant flows from the outlet pipe to the inlet pipe of the electronic expansion valve. The refrigerant acts vertically on the side of the valve needle of the electronic expansion valve, and the excitation force generated is small, which is not easy to cause the valve needle to vibrate.

[0080] By analyzing the refrigerant flow sound generated during the startup of the heating mode, it was found that the refrigerant flow sound generated during the startup of the heating mode is mainly because the valve needle inside the electronic expansion valve is subjected to the excitation force of the gaseous refrigerant. The vibration of the valve needle will radiate high-frequency noise, thereby generating refrigerant flow sound.

[0081] Therefore, how to change the excitation force on the valve needle inside the electronic expansion valve to effectively reduce the refrigerant flow noise has become an urgent problem to be solved.

[0082] In order to reduce the refrigerant flow noise in the heating mode, the embodiment of the present application also provides a regulating device, which is applied to the above Figure 1 The air conditioning system is described in detail below with reference to the accompanying drawings. Figure 3 , Figure 3 A schematic structural diagram of an adjusting device provided in a feasible embodiment.

[0083] like Figure 3 As shown, the regulating device may include: an electronic expansion valve (in the embodiment of the present application, unless otherwise specified, the electronic expansion valve refers to the electronic expansion valve of the indoor unit), a bypass pipe 34. The electronic expansion valve includes a valve body 31, an inlet pipe 32, an outlet pipe 33, and a valve needle 36. It should be understood that Figure 3 Only some components of the electronic expansion valve are shown; the electronic expansion valve may also include other components not shown. For example, the electronic expansion valve also includes a coil and a rotor assembly. The rotor assembly is connected to a valve needle, which is used to adjust the opening of the electronic expansion valve. The rotor assembly is used to drive the valve needle, and the coil surrounds the valve needle.

[0084] In the embodiment of the present application, one end of the bypass pipe 34 is connected to the valve body 31 of the electronic expansion valve, and the other end is connected to one side of the electronic expansion valve inlet pipe 32.

[0085] Since the refrigerant in heating mode flows from the inlet pipe of the electronic expansion valve to the outlet pipe ( Figure 3 (The solid arrow indicates the direction of refrigerant flow in heating mode.) Due to the internal structure of the electronic expansion valve, the valve needle is vertical. When refrigerant flows from the inlet pipe into the electronic expansion valve, it directly impacts the top of the valve needle, causing the valve needle to vibrate and produce refrigerant flow noise. A bypass pipe 34 is provided in the inlet pipe 32 of the electronic expansion valve. This allows some gaseous refrigerant to flow through the bypass pipe before entering the electronic expansion valve in heating mode. This reduces the excitation of the valve needle by the gaseous refrigerant, reduces the excitation force on the valve needle, and reduces valve needle noise.

[0086] As a feasible implementation method, the regulating device further includes a one-way valve 35 provided on the bypass pipe 34, and the outlet of the one-way valve is adjacent to the electronic expansion valve.

[0087] Since the present embodiment adopts a one-way valve, the one-way valve is in a closed state in the direction of refrigerant flow in the cooling mode, and thus will not affect the operation of the air-conditioning system.

[0088] The present application also provides a control method for reducing the refrigerant flow noise, which is applied to the above Figure 1 The air conditioning system shown, such as Figure 4 As shown, the control method includes the following steps:

[0089] S401 : In response to a mode control instruction, read a mode carried in the mode control instruction.

[0090] In some embodiments, when a user turns on the air conditioning system, the user triggers a mode control instruction, each of which corresponds to a unique mode, including but not limited to cooling, heating, ventilation, and dehumidification modes.

[0091] The trigger mode control instruction may be implemented by a user inputting it through a remote controller or a control panel, and the remote controller or the control panel sends the start instruction input by the user to the controller of the air conditioner.

[0092] S402: If the mode is heating mode, open the one-way valve.

[0093] In heating mode, the refrigerant flows from the inlet pipe to the outlet pipe of the electronic expansion valve. Due to the internal structure of the electronic expansion valve, the valve needle is in a vertical direction. When the refrigerant flows from the inlet pipe into the electronic expansion valve, it will directly collide with the top of the valve needle of the electronic expansion valve, causing the valve needle to vibrate, thereby generating the refrigerant flow sound. Therefore, when the user turns on the heating mode, open the one-way valve to reduce the refrigerant flow sound.

[0094] As a possible implementation, Figure 5 As shown, the steps of opening the one-way valve include:

[0095] S501, obtaining indoor unit status;

[0096] S502: If the indoor unit is in the off state, the opening of the electronic expansion valve is set to the first opening EVI (n1), and the one-way valve is opened.

[0097] In the embodiment of the present application, the first opening EVI (n1) is pre-set by the system and can be set according to needs during actual application. The embodiment of the present application does not impose any restrictions on this.

[0098] In this implementation, the fans and heat exchangers of the indoor units that are not turned on are in the off state. However, considering the reliability of the compressor oil return, the opening of the electronic expansion valve is generally controlled to a certain opening. Among them, the oil return reliability refers to the fact that when the refrigerant is discharged from the compressor exhaust port, it will take away a portion of the lubricating oil. As the refrigerant circulates, the lubricating oil gradually deposits in layers in the evaporator and heat exchanger. The loss of lubricating oil will cause inconvenience to the operation of the air-conditioning system. This application sets the opening of the electronic expansion valve that is not turned on to the first opening EVI (n1) to ensure the smooth operation of the air-conditioning system.

[0099] As another possible implementation, Figure 6 As shown, the steps of opening the one-way valve include:

[0100] S601: If the indoor unit is in operation, set the opening of the electronic expansion valve to the second opening EVI (n2).

[0101] The second opening degree EVI (n2) is pre-set by the system and can be set according to actual needs during actual application. This embodiment of the present application does not impose any restrictions on this. It should be noted that the second opening degree EVI (n2) is greater than the first opening degree EVI (n1) because the refrigerant flow rate of the indoor unit that is not turned on is small, while the refrigerant flow rate of the indoor unit that is turned on is large, so the opening degree of the electronic expansion valve needs to be increased.

[0102] S602: After a first set time, open the one-way valve.

[0103] Among them, the first set time is pre-set by the system and can be set according to needs during actual application. The embodiment of the present application does not impose any restrictions on this.

[0104] In this implementation, the fans and heat exchangers of the powered-on indoor units are in the on state, enabling heat exchange between the refrigerant flowing in the heat transfer tubes and the outdoor air, thereby assisting in temperature regulation. Therefore, when the powered-on indoor units start in heating mode, the proportion of gaseous refrigerant in the system is relatively small, which will not significantly impact the valve needle of the electronic expansion valve. Therefore, there is no need to open the check valve in advance. Instead, the check valve can be opened simultaneously with the compressor startup after the first set time has passed.

[0105] As a possible implementation, the air conditioning system further includes a compressor, such as Figure 7 As shown, the control method further includes the following steps:

[0106] S701: After a first set time, start the compressor and read the compressor frequency.

[0107] S702: If the frequency of the compressor is equal to the set frequency, close the one-way valve.

[0108] During the air conditioning system startup process, pressure and temperature fluctuations throughout the system can easily cause refrigerant flow noise at the electronic expansion valve outlet. Therefore, opening the electronic expansion valve first to balance the pressure and temperature before and after the valve, then waiting for the first set time, and then starting the compressor, can prevent the mixed gas and liquid refrigerant from significantly impacting the valve needle of the electronic expansion valve, thereby reducing refrigerant flow noise. If the compressor frequency is equal to the set frequency, pressure and temperature throughout the system are stable, and refrigerant flow noise is less likely to occur, so the check valve can be closed.

[0109] In some embodiments, if the mode is other than Figure 8 As shown, the control method further includes the following steps:

[0110] S801. Set the opening of the electronic expansion valve to the second opening EVI (n2).

[0111] Among them, other modes are modes different from the heating mode, such as cooling mode, air supply mode, dehumidification mode, etc., and the embodiments of the present application do not impose any restrictions.

[0112] Since in other modes the refrigerant flows from the outlet pipe of the electronic expansion valve to the inlet pipe or does not flow, it is not easy to produce refrigerant flow sound. Therefore, when the user turns on other modes, it is only necessary to control the opening of the electronic expansion valve at a certain opening to balance the system pressure and temperature.

[0113] S802: After the second set time has passed, start the compressor.

[0114] In other modes, the electronic expansion valve is first opened to balance the pressure and temperature before and after the electronic expansion valve, and then the compressor is started after a second set time. This can prevent the gaseous refrigerant from significantly impacting the valve needle of the electronic expansion valve, thereby avoiding the generation of refrigerant flow noise. The second set time can be pre-set by the system and, in actual application, can be equal to the first set time. The specific setting is based on actual needs and is not limited in this embodiment of the application.

[0115] An air-conditioning system is also provided in an embodiment of the present application. The air-conditioning system includes at least one indoor unit and an outdoor unit connected to the indoor unit. The indoor unit includes a regulating device and a controller connected to the regulating device. The regulating device includes: an electronic expansion valve, a bypass pipe and a one-way valve; the bypass pipe is arranged on one side of the inlet pipe of the electronic expansion valve, the one-way valve is arranged on the bypass pipe, and the outlet of the one-way valve is adjacent to the electronic expansion valve; the controller is configured to execute the control method provided in the embodiment of the present application.

[0116] See also Figure 9 An embodiment of the present application also provides a control device for reducing the refrigerant flow noise, including: a reading module for reading the mode and indoor unit status carried by the mode control instruction, and also for reading the frequency of the compressor; a control module for adjusting the opening of the electronic expansion valve to the target opening and opening and closing the one-way valve, and also for starting the compressor.

[0117] As a possible implementation method, the control device includes a reading module and a control module. The reading module is used to read the status of the indoor unit. If the indoor unit is in a closed state, the control module is used to open the one-way valve and set the opening of the electronic expansion valve to a first opening.

[0118] As a possible implementation, if the indoor unit is in operation, the opening of the electronic expansion valve is set to a second opening, which is greater than the first opening; after a first set time, the one-way valve is opened.

[0119] As a possible implementation manner, the control module is further configured to: start the compressor after a first set time.

[0120] As a possible implementation manner, the reading module is further configured to read the frequency of the compressor; if the frequency of the compressor is equal to the set frequency, the one-way valve is closed.

[0121] As a possible implementation manner, if the mode is other modes, which are different from the heating mode, the opening of the electronic expansion valve is set to the second opening.

[0122] As a possible implementation manner, after the step of setting the opening of the electronic expansion valve to the second opening, the compressor is started after a second set time.

[0123] In the case of integrated units, Figure 10 A possible structural diagram of a control device is shown. The control device 90 includes: a memory 901 , a processor 902 , a communication interface 903 and a communication line 904 .

[0124] It should be noted that Figure 9 The scenario in which the control device includes one processor is merely illustrative and does not constitute a limitation. In actual application, the number of processors can be set according to demand, and the applicant does not make too many limitations here.

[0125] The memory 901, processor 902, and communication interface 903 are connected via a communication line 904. The memory 901 is used to store computer program code and data. The computer program code includes instructions, and the processor 902 is used to execute the instructions stored in the memory 901. The communication interface 903 is used to connect to other external devices to receive input content, thereby realizing the control device in the embodiment of the present invention.

[0126] The memory 901 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory can be independent and connected to the processor via a bus. The memory can also be integrated with the processor.

[0127] The processor 902 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present invention.

[0128] The communication interface 903 can be connected to air-conditioning system components such as a regulating device, a temperature sensor, and a compressor to send signals to the above-mentioned air-conditioning system components or receive signals sent by the above-mentioned air-conditioning system components.

[0129] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0130] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0131] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0132] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0133] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the full classification part or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute the full classification part or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.

[0134] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An air conditioning system, characterized in that: The air conditioning system includes a compressor, at least one indoor unit, and an outdoor unit connected to the indoor unit. The indoor unit includes a regulating device and a controller connected to the regulating device. The regulating device includes: an electronic expansion valve, a bypass pipe, and a one-way valve; one end of the bypass pipe is connected to the valve body of the electronic expansion valve, and the other end is connected to one side of the inlet pipe of the electronic expansion valve. The one-way valve is provided on the bypass pipe, and the outlet of the one-way valve is adjacent to the electronic expansion valve; the controller is configured to perform: In response to a mode control instruction, reading a mode carried by the mode control instruction; If the mode is heating mode, reading the indoor unit status and starting the compressor after a first set time; If the indoor unit is in a closed state, setting the opening of the electronic expansion valve to a first opening and opening the one-way valve; reading the frequency of the compressor; If the frequency of the compressor is equal to the set frequency, the one-way valve is closed.

2. The air conditioning system according to claim 1, characterized in that The controller is further configured to: If the indoor unit is in operation, setting the opening of the electronic expansion valve to a second opening, the second opening being greater than the first opening; After the first set time, the one-way valve is opened.

3. The air conditioning system according to claim 1, characterized in that The controller is further configured to: If the mode is another mode, the another mode is a mode different from the heating mode; The opening degree of the electronic expansion valve is set to a second opening degree, which is greater than the first opening degree.

4. The air conditioning system according to claim 3, characterized in that After the step of setting the opening of the electronic expansion valve to a second opening, the controller is further configured to: After the second set time, the compressor is started.

5. A control method for reducing refrigerant flow noise, characterized in that: Applicable to an air conditioning system, the air conditioning system includes at least one indoor unit, the indoor unit includes a regulating device, the regulating device includes: an electronic expansion valve, a bypass pipe and a one-way valve; one end of the bypass pipe is connected to the valve body of the electronic expansion valve, and the other end is connected to one side of the inlet pipe of the electronic expansion valve; the one-way valve is arranged on the bypass pipe, and the outlet of the one-way valve is adjacent to the electronic expansion valve; the control method includes: In response to a mode control instruction, reading a mode carried by the mode control instruction; If the mode is heating mode, reading the indoor unit status and starting the compressor after a first set time; If the indoor unit is in a closed state, setting the opening of the electronic expansion valve to a first opening and opening the one-way valve; reading the frequency of the compressor; If the frequency of the compressor is equal to the set frequency, the one-way valve is closed.

6. A control device for reducing refrigerant flow noise, characterized in that: The control device is applicable to an air conditioning system, the air conditioning system including at least one indoor unit, the indoor unit including a regulating device, the regulating device including: an electronic expansion valve, a bypass pipe, and a one-way valve; one end of the bypass pipe is connected to the valve body of the electronic expansion valve, and the other end is connected to one side of the inlet pipe of the electronic expansion valve; the one-way valve is arranged on the bypass pipe, and the outlet of the one-way valve is adjacent to the electronic expansion valve; the control device includes: A reading module, configured to read the mode and the indoor unit status carried by the mode control instruction; a control module configured to read the indoor unit status if the mode is heating mode and start the compressor after a first set time; and to set the opening of the electronic expansion valve to a first opening and open the one-way valve if the indoor unit is in an off state; The reading module is further used to read the frequency of the compressor; The control module is further configured to close the one-way valve if the frequency of the compressor is equal to a set frequency.

Images