Operation control method and device of air conditioner and storage medium

Abstract

The invention discloses an operation control method of an air conditioner, the air conditioner, an operation control device and a computer readable storage medium, the air conditioner comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a first throttling device, a hot air bypass pipe, a second throttling device and an electromagnetic valve, and the four-way valve is connected with the compressor; the indoor heat exchanger is connected with the four-way valve; the outdoor heat exchanger is connected with the four-way valve; one end of the first throttling device is connected with the outdoor heat exchanger; the hot air bypass pipe is arranged at the bottom of the outdoor heat exchanger; one end of the hot air bypass pipe is connected with the other end of the first throttling device; the second throttling device is connected between the other end of the hot air bypass pipe and the indoor heat exchanger; one end of the electromagnetic valve is connected to the connecting point of the outdoor heat exchanger and the first throttling device, and the other end of the electromagnetic valve is connected to the connecting point of the hot air bypass pipe and the second throttling device. And the heat exchange effect is good, and the energy efficiency of the whole machine can be improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air conditioner operation control method, an air conditioner, an operation control device, and a computer-readable storage medium. Background Technology

[0002] Air conditioners often have an electric heater installed in the drip tray below the outdoor heat exchanger. When the temperature is low, the electric heater is turned on to heat the water in the drip tray and prevent it from freezing. The electric heater is a low-energy-efficiency device with high power consumption. However, current air conditioners have increasingly higher energy efficiency requirements, and adding an electric heater will reduce the overall energy efficiency of the unit and also pose a risk of electric leakage.

[0003] Setting up additional refrigerant piping to use higher-temperature refrigerant to heat the water pan can replace the function of an electric heater, but it also makes the refrigerant circuit of the air conditioner more complex, resulting in poor heat exchange and reduced overall energy efficiency. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an air conditioner operation control method, an air conditioner, an operation control device and a computer-readable storage medium, which constructs a simple refrigerant circuit, which can not only improve the subcooling degree, but also realize the use of refrigerant to heat the water receiving pan at the bottom of the outdoor heat exchanger, with better heat exchange effect and improved overall energy efficiency.

[0005] In a first aspect, embodiments of the present invention provide an operation control method for an air conditioner, the air conditioner comprising a first throttling device, a hot gas bypass pipe, a second throttling device, and a solenoid valve; one end of the first throttling device is connected to an outdoor heat exchanger; the hot gas bypass pipe is disposed at the bottom of the outdoor heat exchanger, and one end of the hot gas bypass pipe is connected to the other end of the first throttling device; the second throttling device is connected between the other end of the hot gas bypass pipe and an indoor heat exchanger; one end of the solenoid valve is connected to the connection point between the outdoor heat exchanger and the first throttling device, and the other end of the solenoid valve is connected to the connection point between the hot gas bypass pipe and the second throttling device; the operation control method includes:

[0006] Obtain the operating mode of the air conditioner and the outdoor ambient temperature;

[0007] When the air conditioner is operating in heating mode and the outdoor ambient temperature is less than a first preset value, the second throttling device is controlled to open to the maximum opening, the solenoid valve is controlled to close, and the first throttling device is controlled to open to the first opening.

[0008] The operation control method provided by the embodiments of the present invention has at least the following beneficial effects: By setting a hot gas bypass pipe at the bottom of the outdoor heat exchanger, and using a first throttling device, a second throttling device, and a solenoid valve in conjunction with the hot gas bypass pipe to modify the refrigerant pipeline, the outdoor heat exchanger, the first throttling device, the hot gas bypass pipe, the second throttling device, and the indoor heat exchanger are connected in sequence, and a refrigerant pipeline connection is added between the connection point of the outdoor heat exchanger and the first throttling device and the connection point of the hot gas bypass pipe and the second throttling device, and a solenoid valve is installed on the refrigerant pipeline, thereby constructing a simple refrigerant circuit; when the air conditioner is operating in heating mode and the outdoor ambient temperature is low, it indicates that when In the initial operating state, the water in the drip tray at the bottom of the outdoor heat exchanger has a high risk of freezing. At this time, controlling the second throttling device to open to its maximum degree has almost no throttling effect. The high-temperature and high-pressure refrigerant discharged from the compressor's exhaust port flows directly through the second throttling device after passing through the indoor heat exchanger. Since the solenoid valve is also closed, the high-temperature refrigerant cannot flow directly to the outdoor heat exchanger through the solenoid valve. Instead, it first flows to the hot gas bypass pipe to heat the drip tray at the bottom of the outdoor heat exchanger, and then flows to the outdoor heat exchanger after being throttled by the first throttling device. This achieves the goal of using the high-temperature refrigerant in the air conditioner to prevent the drip tray at the bottom of the outdoor heat exchanger from freezing, thereby improving the overall energy efficiency of the unit.

[0009] The operation control method provided by some embodiments of the present invention further includes:

[0010] When the air conditioner is running in cooling mode, the first throttling device is controlled to open to the maximum opening, the solenoid valve is controlled to close, and the second throttling device is controlled to open to the first opening.

[0011] The operation control method provided by some embodiments of the present invention further includes:

[0012] When the air conditioner is operating in heating mode and the outdoor ambient temperature is greater than or equal to the first preset value, the second throttling device is controlled to open to the first degree, the solenoid valve is controlled to open, and the first throttling device is controlled to close.

[0013] According to some embodiments of the present invention, when the air conditioner is operating in heating mode and the outdoor ambient temperature is less than a first preset value, the pipe temperature of the hot gas bypass pipe is obtained, and the opening degree of the first throttling device is adjusted according to the pipe temperature.

[0014] According to some embodiments of the present invention, the operation control method provides that when the pipe temperature is less than a second preset value, the opening degree of the first throttling device is reduced.

[0015] According to some embodiments of the present invention, the operation control method provides that when the pipe temperature is greater than or equal to a second preset value, the opening degree of the first throttling device is controlled to remain unchanged.

[0016] Secondly, embodiments of the present invention provide an air conditioner, including a first throttling device, a hot gas bypass pipe, a second throttling device, and a solenoid valve, wherein:

[0017] One end of the first throttling device is connected to the outdoor heat exchanger;

[0018] The hot gas bypass pipe is located at the bottom of the outdoor heat exchanger, and one end of the hot gas bypass pipe is connected to the other end of the first throttling device.

[0019] The second throttling device is connected between the other end of the hot gas bypass pipe and the indoor heat exchanger;

[0020] One end of the solenoid valve is connected to the connection point between the outdoor heat exchanger and the first throttling device, and the other end of the solenoid valve is connected to the connection point between the hot gas bypass pipe and the second throttling device.

[0021] The air conditioner provided according to the embodiments of the present invention has at least the following beneficial effects: by installing a hot gas bypass pipe at the bottom of the outdoor heat exchanger, high-temperature refrigerant can be directed to the hot gas bypass pipe to heat the water in the drip tray at the bottom of the outdoor heat exchanger when there is a risk of water freezing. The modification of the refrigerant piping is achieved by using a first throttling device, a second throttling device, and a solenoid valve in conjunction with the hot gas bypass pipe. The outdoor heat exchanger, the first throttling device, the hot gas bypass pipe, the second throttling device, and the indoor heat exchanger are connected sequentially, and the connection point between the outdoor heat exchanger and the first throttling device is... A refrigerant pipeline is added between the connection point of the hot gas bypass pipe and the second throttling device, and a solenoid valve is installed on the refrigerant pipeline, thus constructing a simple refrigerant circuit. During cooling, the second throttling device can be used to mainly throttle the refrigerant and allow the refrigerant passing through the indoor heat exchanger to flow to the hot gas bypass pipe, thereby increasing the subcooling and improving the heat exchange effect. During heating, the first throttling device can be used to mainly throttle the refrigerant and allow the high-temperature refrigerant to flow to the hot gas bypass pipe, thereby heating the bottom of the outdoor heat exchanger to prevent the water in the drip tray from freezing. It has a good heat exchange effect and can improve the overall energy efficiency of the unit.

[0022] An air conditioner provided according to some embodiments of the present invention further includes a compressor and a four-way valve, the four-way valve being respectively connected to the air outlet of the compressor, the exhaust port of the compressor, the indoor heat exchanger and the outdoor heat exchanger; the first throttling device and the second throttling device are electronic expansion valves.

[0023] Thirdly, embodiments of the present invention provide an operation control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the operation control method described in the second aspect of the embodiments above.

[0024] Fourthly, embodiments of the present invention provide an air conditioner including the operation control device described in the third aspect embodiment.

[0025] Fifthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the operation control method described in the second aspect of the embodiments above.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0027] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0029] Figure 1 This is a system schematic diagram of an air conditioner provided in an embodiment of the present invention;

[0030] Figure 2 This is a flowchart of the air conditioner operation control method provided in the embodiment of the present invention;

[0031] Figure 3 This is a flowchart of a specific embodiment of the air conditioner operation control method provided in this invention;

[0032] Figure 4 This is a schematic diagram of the operation control device provided in an embodiment of the present invention. Detailed Implementation

[0033] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0034] In the description of the embodiments of the present invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, while "above," "below," "within," etc. are understood to include the number itself. "At least one" refers to one or more, and "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or multiple items. If "first," "second," etc., are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0035] It should be noted that the terms "setting," "installing," and "connecting" in the embodiments of this invention should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of this invention in conjunction with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or a connection that allows for mutual communication; it can be a direct connection or an indirect connection through an intermediate medium.

[0036] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Air conditioners often have an electric heater installed in the drip tray below the outdoor heat exchanger. This heater is activated when the temperature is low to heat the water in the tray and prevent it from freezing. However, electric heaters are low-efficiency devices, with an energy efficiency rating of no more than 1.0, and consume a lot of electricity. Air conditioners, on the other hand, are high-efficiency products, and current energy efficiency requirements are increasingly stringent. Adding an electric heater would lower the overall energy efficiency and also pose a risk of electrical leakage. Given the current trend of advocating energy conservation, emission reduction, and the use of clean energy, low-efficiency electric heating components should be gradually phased out. Installing refrigerant piping in the drip tray below the outdoor heat exchanger, using higher-temperature refrigerant to heat the tray, is a feasible alternative to the electric heater. However, the additional refrigerant piping would complicate the refrigerant circuit of the air conditioner, resulting in poor heat exchange and reduced overall energy efficiency.

[0038] Based on this, embodiments of the present invention provide an air conditioner operation control method, an air conditioner, an operation control device, and a computer-readable storage medium, which constructs a simple refrigerant circuit, which can not only improve the subcooling degree, but also realize the use of refrigerant to heat the water receiving pan at the bottom of the outdoor heat exchanger, resulting in a better heat exchange effect and improving the overall energy efficiency of the unit.

[0039] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0040] Reference Figure 1A first aspect of the present invention provides an air conditioner, comprising a compressor 100, a four-way valve 200, an indoor heat exchanger 300, an outdoor heat exchanger 400, a hot gas bypass pipe 500, a first throttling device 600, a second throttling device 700, and a solenoid valve 800, wherein:

[0041] The first end of the four-way valve 200 is connected to the exhaust port of the compressor 100; the fourth end of the four-way valve 200 is connected to the return port of the compressor 100; one end of the indoor heat exchanger 300 is connected to the second end of the four-way valve 200; one end of the outdoor heat exchanger 400 is connected to the third end of the four-way valve 200. It can be understood that when the air conditioner is operating in heating mode, the four-way valve 200 is in a state where its first and second ends are open, as well as its third and fourth ends are open. At this time, the high-temperature, high-pressure refrigerant from the exhaust port of the compressor 100 enters the four-way valve 200 through its first end and is transferred to the indoor heat exchanger 300 through its second end. Simultaneously, the low-temperature, low-pressure refrigerant from the outdoor heat exchanger 400 enters the four-way valve 200 through its third end and flows back to the return port of the compressor 100 through its fourth end. (See also...) Figure 1 As shown by the dashed arrows; when the air conditioner is operating in cooling mode, the four-way valve 200 is in a state where its first and third terminals are open, and its second and fourth terminals are open. At this time, the high-temperature, high-pressure refrigerant from the exhaust port of the compressor 100 enters the four-way valve 200 through its first terminal and is transferred to the outdoor heat exchanger 400 through its third terminal. Simultaneously, the low-temperature, low-pressure refrigerant from the indoor heat exchanger 300 enters the four-way valve 200 through its second terminal and flows back to the compressor 100's return port through its fourth terminal. See [link to relevant documentation]. Figure 1 As shown by the solid arrow in the image;

[0042] One end of the first throttling device 600 is connected to the other end of the outdoor heat exchanger 400; the hot gas bypass pipe 500 is located at the bottom of the outdoor heat exchanger 400, and one end of the hot gas bypass pipe 500 is connected to the other end of the first throttling device 600; the second throttling device 700 is connected between the other end of the hot gas bypass pipe 500 and the other end of the indoor heat exchanger 300; one end of the solenoid valve 800 is connected to the connection point between the outdoor heat exchanger 400 and the first throttling device 600, and the other end of the solenoid valve 800 is connected to the connection point between the hot gas bypass pipe 500 and the second throttling device 700.

[0043] According to the air conditioner provided in the embodiment of the present invention, by providing a hot gas bypass pipe 500 at the bottom of the outdoor heat exchanger 400, high-temperature refrigerant can be directed to the hot gas bypass pipe 500 to heat the water in the drip tray at the bottom of the outdoor heat exchanger 400 when there is a risk of freezing. The refrigerant piping is modified using a first throttling device 600, a second throttling device 700, and a solenoid valve 800 in conjunction with the hot gas bypass pipe 500. The outdoor heat exchanger 400, the first throttling device 600, the hot gas bypass pipe 500, the second throttling device 700, and the indoor heat exchanger 300 are connected sequentially. The connection between the outdoor heat exchanger 400 and the first throttling device 600... A refrigerant pipeline is added between the connection point and the connection point of the hot gas bypass pipe 500 and the second throttling device 700, and a solenoid valve 800 is installed on the refrigerant pipeline, thus constructing a simple refrigerant circuit. During cooling, the second throttling device 700 can be used to mainly throttle the refrigerant and allow the refrigerant passing through the outdoor heat exchanger 400 to flow to the hot gas bypass pipe 500, thereby increasing the subcooling and improving the heat exchange effect. During heating, the first throttling device 600 can be used to mainly throttle the refrigerant and allow the high-temperature refrigerant to flow to the hot gas bypass pipe 500, thereby heating the bottom of the outdoor heat exchanger 400 to prevent the water in the drip tray from freezing. It has a better heat exchange effect and can improve the overall energy efficiency of the unit.

[0044] In some embodiments of the air conditioner provided by the present invention, the first throttling device 600 and the second throttling device 700 are electronic expansion valves. It is understood that an electronic expansion valve is a throttling element that allows the refrigerant flow into the refrigeration unit according to a preset program. In situations where load changes drastically or the operating conditions are wide-ranging, traditional throttling elements such as capillary tubes and thermostatic expansion valves can no longer meet the requirements for comfort and energy saving, while electronic expansion valves can well meet these requirements.

[0045] Reference Figure 2 A second aspect of the present invention provides an operation control method for an air conditioner as described in the first aspect embodiment above, including but not limited to steps S210 to S220:

[0046] Step S210: Obtain the air conditioner's operating mode and outdoor ambient temperature;

[0047] Step S220: When the air conditioner is operating in heating mode and the outdoor ambient temperature is lower than the first preset value, the second throttling device 700 is controlled to open to its maximum opening, the solenoid valve 800 is controlled to close, and the first throttling device 600 is controlled to open to its first opening. For example, the first preset value is set to 0°C.

[0048] According to the operation control method provided in the embodiment of the present invention, when the air conditioner is operating in heating mode and the outdoor ambient temperature is low, such as below 0°C, it indicates that the water in the drip tray at the bottom of the outdoor heat exchanger 400 has a high risk of freezing under the current operating state. At this time, by controlling the second throttling device 700 to open to the maximum degree, there is almost no throttling effect. The high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 100 flows directly through the second throttling device 700 after passing through the indoor heat exchanger 300. Since the solenoid valve 800 is also controlled to be closed, the high-temperature refrigerant cannot flow directly to the outdoor heat exchanger 400 through the solenoid valve 800. Instead, it first flows to the hot gas bypass pipe 500 to heat the drip tray at the bottom of the outdoor heat exchanger 400, and then flows to the outdoor heat exchanger 400 after being throttled by the first throttling device 600. This realizes the use of the high-temperature refrigerant in the air conditioner to prevent the drip tray at the bottom of the outdoor heat exchanger 400 from freezing, which can improve the overall energy efficiency.

[0049] In some embodiments of the present invention, the operation control method further includes: when the air conditioner is operating in cooling mode, controlling the first throttling device 600 to open to the maximum opening degree, controlling the solenoid valve 800 to close, and controlling the second throttling device 700 to open to the first opening degree.

[0050] Understandably, in cooling mode, the high-temperature, high-pressure refrigerant from the compressor 100's discharge port enters the four-way valve 200 from its first end and is then transferred to the outdoor heat exchanger 400 from its third end. At this time, by controlling the solenoid valve 800 to close, the refrigerant flowing from the outdoor heat exchanger 400 cannot flow directly to the indoor heat exchanger 300 via the solenoid valve 800, but instead flows to the first throttling device 600; and by also controlling the first throttling device 600 to open... At maximum opening, there is almost no throttling effect. The refrigerant flows directly through the first throttling device 600 and then to the hot gas bypass pipe 500, thereby increasing the subcooling of the outdoor heat exchanger 400 and improving the heat exchange effect. After being throttled by the second throttling device 700, it flows to the indoor heat exchanger 300. The low-temperature, low-pressure refrigerant exiting the indoor heat exchanger 300 enters the four-way valve 200 from the second end and flows back to the return port of the compressor 100 from the fourth end of the four-way valve 200. See the refrigerant flow direction. Figure 1 As shown by the solid arrow in the image.

[0051] In some embodiments of the present invention, the operation control method further includes: when the air conditioner is operating in heating mode and the outdoor ambient temperature is greater than or equal to a first preset value, controlling the second throttling device 700 to open to a first opening degree, controlling the solenoid valve 800 to open, and controlling the first throttling device 600 to close. For example, the first preset value can be set to 0°C.

[0052] In this embodiment, when the air conditioner is operating in heating mode and the outdoor ambient temperature reaches 0°C, it indicates that there is no risk of the water in the drip tray at the bottom of the outdoor heat exchanger 400 freezing under the current operating state. The high-temperature and high-pressure refrigerant from the exhaust port of the compressor 100 enters the four-way valve 200 from the first end and is transferred to the indoor heat exchanger 300 from the second end of the four-way valve 200. Since the solenoid valve 800 is open, the refrigerant flowing out of the indoor heat exchanger 300 flows directly to the outdoor heat exchanger 400 through the solenoid valve 800 after passing through the second throttling device 700. Also, since the first throttling device 600 is closed, there is no refrigerant flowing in the hot gas bypass pipe 500, and it does not participate in the refrigerant circulation and heat exchange. Finally, the low-temperature and low-pressure refrigerant from the outdoor heat exchanger 400 enters the four-way valve 200 from the third end and flows back to the return port of the compressor 100 from the fourth end of the four-way valve 200.

[0053] In the operation control method provided in some embodiments of the present invention, when the air conditioner is operating in heating mode and the outdoor ambient temperature is less than a first preset value, the pipe temperature of the hot gas bypass pipe 500 is obtained, and the opening degree of the first throttling device 600 is adjusted according to the pipe temperature.

[0054] In this embodiment, when the air conditioner is operating in heating mode and the outdoor ambient temperature is lower than a first preset value, i.e., when the high-temperature refrigerant in the air conditioner needs to be used to prevent the water tray at the bottom of the outdoor heat exchanger 400 from freezing, the temperature of the hot gas bypass pipe 500 needs to be high enough to heat the water tray at the bottom of the outdoor heat exchanger 400. Therefore, adjusting the opening of the first throttling device 600 according to the pipe temperature ensures that the pipe temperature of the hot gas bypass pipe 500 is high enough. Specifically, when the pipe temperature is lower than a second preset value, the opening of the first throttling device 600 is reduced. For example, the second preset value is set to 20°C. Therefore, when the pipe temperature of the hot gas bypass pipe 500 is lower than 20°C, reducing the opening of the first throttling device 600 allows more high-temperature refrigerant to accumulate in the hot gas bypass pipe 500, which helps to increase the pipe temperature of the hot gas bypass pipe 500.

[0055] In some embodiments of the present invention, the operation control method provides that when the pipe temperature is greater than or equal to a second preset value, the opening degree of the first throttling device 600 is kept constant.

[0056] It is understandable that when the pipe temperature is greater than or equal to the second preset value, such as greater than or equal to 20°C, it means that the current pipe temperature of the hot gas bypass pipe 500 is high enough to have a good heating effect on the water receiving pan at the bottom of the outdoor heat exchanger 400. At this time, the opening of the first throttling device 600 is kept unchanged, and there is no need to adjust the refrigerant flow rate.

[0057] The following is combined Figure 3The following is a detailed description of the air conditioner operation control method provided in the embodiments of the present invention:

[0058] Step S300: The air conditioner is powered on and starts running; if a heating mode activation command is received, proceed to step S301; if a cooling mode activation command is received, proceed to step S311.

[0059] Step S301: Heating mode is turned on; at this time, the four-way valve 200 is in the state of opening its first end and second end and opening its third end and fourth end. At this time, the high temperature and high pressure refrigerant from the exhaust port of the compressor 100 enters the four-way valve 200 from the first end and is transferred to the indoor heat exchanger 300 from the second end of the four-way valve 200; jump to step S302;

[0060] Step S302: Obtain the outdoor ambient temperature T4; Proceed to step S303;

[0061] Step S303: Determine if the outdoor ambient temperature T4 is less than 0℃. If yes, proceed to step S305; otherwise, proceed to step S304.

[0062] Step S304: Control the second throttling device 700 to open to the first opening degree, the solenoid valve 800 to open, and the first throttling device 600 to close; jump to step S302;

[0063] Step S305: The flow device 700 opens to its maximum opening, the solenoid valve 800 closes, and the first throttling device 600 opens to its first opening; proceed to step S306;

[0064] Step S306: The hot gas bypass pipe 500 heats the water collection pan at the bottom of the outdoor heat exchanger 400; at this time, the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 100 flows directly through the second throttling device 700 after passing through the indoor heat exchanger 300. Since the solenoid valve 800 is also closed, the high-temperature refrigerant cannot flow directly to the outdoor heat exchanger 400 through the solenoid valve 800. Instead, it first flows to the hot gas bypass pipe 500 to heat the water collection pan at the bottom of the outdoor heat exchanger 400, and then flows to the outdoor heat exchanger 400 after being throttled by the first throttling device 600. This achieves the use of the high-temperature refrigerant in the air conditioner to prevent the water collection pan at the bottom of the outdoor heat exchanger 400 from freezing; jump to step S307;

[0065] Step S307: Obtain the pipe temperature Tg of the hot gas bypass pipe 500; proceed to step S308;

[0066] Step S308: Determine whether the pipe temperature Tg of the hot gas bypass pipe 500 is less than 20℃. If yes, proceed to step S309; ​​if no, proceed to step S310.

[0067] Step S309: Reduce the opening of the first throttling device 600; at this time, more high-temperature refrigerant can accumulate in the hot gas bypass pipe 500, which is beneficial to increase the pipe temperature of the hot gas bypass pipe 500.

[0068] Step S310: Keep the opening of the first throttling device 600; this indicates that the current hot gas bypass pipe 500 is hot enough to provide a good heating effect on the water receiving pan at the bottom of the outdoor heat exchanger 400. At this time, keep the opening of the throttling device 600 unchanged and do not need to adjust the refrigerant flow.

[0069] Step S311: Cooling mode is turned on; at this time, the high-temperature and high-pressure refrigerant from the exhaust port of the compressor 100 enters the four-way valve 200 from the first end of the four-way valve 200 and is transferred to the outdoor heat exchanger 400 from the third end of the four-way valve 200; jump to step S312.

[0070] Step S312: Control the first throttling device 600 to open to its maximum opening, the solenoid valve 800 to close, and the second throttling device 700 to open to its first opening. At this time, by controlling the solenoid valve 800 to close, the refrigerant flowing out of the outdoor heat exchanger 400 cannot flow directly to the indoor heat exchanger 300 through the solenoid valve 800, but flows to the first throttling device 600. Since the first throttling device 600 is also controlled to open to its maximum opening, there is almost no throttling effect. The refrigerant flows directly through the first throttling device 600 and then flows to the hot gas bypass pipe 500, thereby increasing the subcooling of the outdoor heat exchanger 400 to improve the heat exchange effect. After being throttled by the second throttling device 700, it flows to the indoor heat exchanger 300. The low-temperature, low-pressure refrigerant coming out of the indoor heat exchanger 300 enters the four-way valve 200 from the second end of the four-way valve 200 and flows back to the return port of the compressor 100 from the fourth end of the four-way valve 200.

[0071] In this embodiment, the air conditioner uses a hot gas bypass pipe 500 at the bottom of the outdoor heat exchanger 400. This allows for the flow of high-temperature refrigerant to the hot gas bypass pipe 500 to heat the water in the drip tray at the bottom of the outdoor heat exchanger 400, even when there is a risk of the water freezing. The modification of the refrigerant piping is achieved using a first throttling device 600, a second throttling device 700, and a solenoid valve 800 in conjunction with the hot gas bypass pipe 500. The components include the outdoor heat exchanger 400, the first throttling device 600, the hot gas bypass pipe 500, and the second throttling device 700. Indoor heat exchangers 300 are connected sequentially, and refrigerant pipelines are added between the connection points of the outdoor heat exchanger 400 and the first throttling device 600, and between the hot gas bypass pipe 500 and the second throttling device 700. A solenoid valve 800 is installed on these refrigerant pipelines, thus constructing a simple refrigerant circuit. During cooling, the second throttling device 700 primarily functions as a throttling device, directing the refrigerant passing through the outdoor heat exchanger 400 to the hot gas bypass pipe 500, thereby increasing subcooling and improving heat exchange efficiency. During heating, the first throttling device... The primary function of throttling device 600 is to direct the high-temperature refrigerant to the hot gas bypass pipe 500, thereby heating the bottom of the outdoor heat exchanger 400 to prevent the water in the drip tray from freezing. It offers good heat exchange performance and improves overall unit energy efficiency. Specifically, when the air conditioner is operating in heating mode and the outdoor ambient temperature is low, it indicates a significant risk of freezing of the water in the drip tray at the bottom of the outdoor heat exchanger 400. In this case, controlling the second throttling device 700 to its maximum opening has almost no throttling effect, and the refrigerant is discharged from the compressor 100's exhaust port. The high-temperature, high-pressure refrigerant flows directly through the second throttling device 700 after passing through the indoor heat exchanger 300. Because the solenoid valve 800 is also closed, the high-temperature refrigerant cannot flow directly to the outdoor heat exchanger 400 through the solenoid valve 800. Instead, it first flows to the hot gas bypass pipe 500 to heat the water tray at the bottom of the outdoor heat exchanger 400. Then, after being throttled by the first throttling device 600, it flows to the outdoor heat exchanger 400. This utilizes the high-temperature refrigerant in the air conditioner to prevent the water tray at the bottom of the outdoor heat exchanger 400 from freezing, thereby improving the overall energy efficiency of the unit.

[0072] Furthermore, a third aspect of the present invention provides an operation control device 400, including a memory 410, a processor 420, and a computer program stored in the memory 410 and executable on the processor 420. The processor 420 executes the program to implement the operation control method of the second aspect embodiment described above, for example, by executing... Figure 2 Method steps S210 to S220 or execution Figure 3 Steps S301 to S312 in the process.

[0073] In addition, a fourth aspect of the present invention provides an air conditioner including an operation control device 400 according to the third aspect embodiment.

[0074] Furthermore, a fifth aspect embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the operation control method of the second aspect embodiment described above, for example, executing... Figure 2 Method steps S210 to S220 or execution Figure 3 Steps S301 to S312 in the process.

[0075] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which may include computer storage media or non-transitory media and communication media or transient media. As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc DVD or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0076] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method of controlling operation of an air conditioner, characterized by, The air conditioner comprises a first throttling device, a hot gas bypass pipe, a second throttling device and a solenoid valve; one end of the first throttling device is connected with an outdoor heat exchanger; the hot gas bypass pipe is arranged at the bottom of the outdoor heat exchanger, and one end of the hot gas bypass pipe is connected with the other end of the first throttling device; the second throttling device is connected between the other end of the hot gas bypass pipe and an indoor heat exchanger; one end of the solenoid valve is connected to the connection point of the outdoor heat exchanger and the first throttling device, and the other end of the solenoid valve is connected to the connection point of the hot gas bypass pipe and the second throttling device; The operation control method comprises: acquiring an operation mode of the air conditioner and an outdoor environment temperature; when the air conditioner operates in a heating mode and the outdoor environment temperature is less than a first preset value, controlling the second throttling device to open to a maximum opening degree, controlling the solenoid valve to close and controlling the first throttling device to open to a first opening degree.

2. The operation control method according to claim 1, characterized by, Further comprising: when the air conditioner operates in a cooling mode, controlling the first throttling device to open to a maximum opening degree, controlling the solenoid valve to close and controlling the second throttling device to open to a first opening degree.

3. The operation control method according to claim 1, characterized by, Further comprising: when the air conditioner operates in a heating mode and the outdoor environment temperature is greater than or equal to the first preset value, controlling the second throttling device to open to a first opening degree, controlling the solenoid valve to open and controlling the first throttling device to close.

4. The operation control method according to claim 1, characterized by In the case that the air conditioner operates in a heating mode and the outdoor environment temperature is less than a first preset value, acquiring a pipe temperature of the hot gas bypass pipe, and adjusting the opening degree of the first throttling device according to the pipe temperature.

5. The operation control method according to claim 4, characterized by When the pipe temperature is less than a second preset value, reducing the opening degree of the first throttling device.

6. The operation control method according to claim 4, characterized by When the pipe temperature is greater than or equal to the second preset value, controlling the opening degree of the first throttling device to remain unchanged.

7. An air conditioner characterized by comprising: Comprise: a first throttling device, one end of the first throttling device being connected with an outdoor heat exchanger; a hot gas bypass pipe, arranged at the bottom of the outdoor heat exchanger, one end of the hot gas bypass pipe being connected with the other end of the first throttling device; a second throttling device, connected between the other end of the hot gas bypass pipe and an indoor heat exchanger; a solenoid valve, one end of the solenoid valve being connected to the connection point of the outdoor heat exchanger and the first throttling device, and the other end of the solenoid valve being connected to the connection point of the hot gas bypass pipe and the second throttling device.

8. The air conditioner of claim 7, wherein Further comprise a compressor and a four-way valve, the four-way valve being connected to the gas outlet of the compressor, the exhaust port of the compressor, the indoor heat exchanger and the outdoor heat exchanger respectively; the first throttling device and the second throttling device are electronic expansion valves.

9. A running control device characterized by comprising: Comprise a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to realize the operation control method according to any one of claims 1 to 6.

10. An air conditioner characterized by comprising: Comprise the operation control device according to claim 9.

11. A computer readable storage medium, characterized in that, The computer readable storage medium stores computer executable instructions for causing a computer to execute the operation control method according to any one of claims 1 to 6.

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