Method and device for controlling oil temperature of compressor of air conditioner

Abstract

The invention discloses an oil temperature control method and device for a compressor of an air conditioner. The method comprises the steps that after a compressor of the air conditioner operates for a preset duration, operation data of the compressor are obtained, and the operation data comprise the bottom temperature value of the compressor and the pressure value of the compressor; heating operation of the air conditioner is determined; the superheat degree of the bottom of the compressor is determined according to the bottom temperature value and the saturation temperature, and the saturation temperature is the temperature of a refrigerant of the compressor under the pressure value; determining a heating mode of a water tank of the air conditioner to a compressor according to the superheat degree and the heating operation mode; and the compressor is heated according to the heating mode so as to control the oil temperature of the compressor. The technical problems that in the prior art, a compressor is prone to poor heat exchange under the low-temperature condition, the situation of incomplete evaporation of a refrigerant possibly occurs, the low-temperature liquid refrigerant returns to the compressor, the compressor is started with liquid, liquid impact occurs, and the reliability of the whole machine is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of home appliance control, and in particular, to a method and device for controlling the oil temperature of a compressor of an air conditioner. Background Art

[0002] As a multi-functional device that can simultaneously provide heating and hot water supply, a heat recovery air conditioning system is particularly popular in cold regions due to its high energy efficiency and environmental protection characteristics. However, in extremely low temperature environments, the reliability and efficiency of the heat recovery air conditioning system face challenges, especially in terms of controlling the oil temperature of the compressor.

[0003] Under low-temperature heating conditions, the oil temperature of the compressor in the air conditioning system may drop to a relatively low level, resulting in the following problems: 1) Refrigerant dissolves in the lubricating oil: Too low oil temperature will cause some refrigerant to dissolve into the lubricating oil, reducing the viscosity of the lubricating oil, and thus affecting the lubrication effect between various components inside the compressor. Insufficient lubrication will accelerate component wear and shorten the life of the compressor; 2) Liquid refrigerant reflux: Under low-temperature conditions, the heat exchange efficiency of the system decreases, which may cause some liquid refrigerant to flow back to the compressor without being fully evaporated. This "liquid slugging" phenomenon not only reduces the system efficiency but also causes liquid hammer in the compressor, damaging the equipment.

[0004] To address these problems, existing methods for controlling the oil temperature of the compressor usually adopt the method of preheating the oil sump at the bottom of the compressor housing with an electric heating tape. Although this method can increase the oil temperature to a certain extent and ensure the normal startup of the compressor, it also has the following disadvantages: 1) Long preheating time: The electric heating method has a slow heating rate. Especially for large compressors, the preheating time may be as long as several hours, significantly extending the startup preparation period of the air conditioning system; 2) Increased energy consumption: Continuously using the electric heating tape for preheating will consume additional electric power resources, offsetting part of the energy-saving advantage of the heat recovery system and going against the original intention of energy-saving design; 3) Poor user experience: The long preheating waiting time reduces the user experience, especially in cases where heating is urgently needed.

[0005] In view of the above problems, no effective solution has been proposed yet. Summary of the Invention

[0006] Embodiments of the present invention provide a method and device for controlling the oil temperature of a compressor of an air conditioner, so as to at least solve the technical problem that in the related art, the compressor is prone to poor heat exchange under low-temperature conditions, and refrigerant evaporation may be incomplete, resulting in low-temperature liquid refrigerant returning to the compressor, causing the compressor to start with liquid and experiencing liquid hammer, affecting the reliability of the whole machine.

[0007] According to one aspect of an embodiment of the present invention, there is provided a method for controlling the oil temperature of a compressor of an air conditioner, including: after the compressor of the air conditioner operates for a predetermined duration, obtaining operation data of the compressor, where the operation data includes: the bottom temperature value of the compressor, the pressure value of the compressor, and the bottom temperature value is the temperature of the bottom housing of the compressor; determining the heating operation mode of the air conditioner, where the heating operation mode represents the current heating method of the air conditioner; determining the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant in the compressor at the pressure value; determining the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode; and performing a heating process on the compressor according to the heating method to control the oil temperature of the compressor.

[0008] Optionally, obtaining the operation data of the compressor includes: when the operation duration of the compressor reaches the predetermined duration, triggering a temperature sensing component to start to detect the temperature of the bottom of the housing of the compressor to obtain the bottom temperature value; when the compressor is a high-pressure chamber compressor, obtaining the discharge pressure value of the compressor; and when the compressor is a low-pressure chamber compressor, obtaining the suction pressure value of the compressor.

[0009] Optionally, determining the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature includes: determining the temperature difference between the bottom temperature value and the saturation temperature; and determining the temperature difference as the superheat degree.

[0010] Optionally, determining the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode includes: obtaining the current water temperature value of the water tank; comparing the current water temperature value with a preset water temperature value to obtain a first comparison result; comparing the superheat degree with a preset heat degree value to obtain a second comparison result; and determining the heating method according to the first comparison result, the second comparison result, and the heating operation mode.

[0011] Optionally, when the heating operation mode is the heating and hot water mode or the separate hot water mode, determining the heating method according to the first comparison result, the second comparison result and the heating operation mode includes: when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, determining the heating method as: introducing hot water from the water tank to the bottom of the compressor housing until the superheat degree is greater than or equal to the set temperature value, where the hot water is water with a temperature value greater than the predetermined heating temperature value, and the set temperature value is the temperature value set when the compressor leaves the factory; when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, determining the heating method as: when heating the water tank until the current water temperature value reaches the preset water temperature value, if the superheat degree is still less than the preset superheat value, introducing the hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value.

[0012] Optionally, when the heating operation mode is the separate heating mode, determining the heating method according to the first comparison result, the second comparison result and the heating operation mode includes: when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, determining the heating method as: introducing hot water from the water tank to the bottom of the compressor housing until the temperature value of the water in the water tank drops to the preset temperature value of the water tank; when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, determining the heating method as: converting the separate heating mode to the heating and hot water mode.

[0013] Optionally, after introducing the hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value, the compressor oil temperature control method of the air conditioner further includes: stopping introducing the hot water from the water tank to the bottom of the housing.

[0014] Optionally, when the heating operation mode is the separate heating mode, the compressor oil temperature control method of the air conditioner further includes: when introducing the hot water from the water tank to the bottom of the housing, if it is detected that the current water temperature value drops to the preset temperature value of the water tank and the superheat degree is less than the set temperature value, converting the separate heating mode to the heating and hot water mode.

[0015] Optionally, the method for controlling the oil temperature of the compressor of the air conditioner further includes: after converting the separate heating mode to the heating and hot water mode, if it is detected that the bottom temperature value is greater than the set temperature value, stop introducing the hot water from the water tank to the bottom of the housing, and convert the heating and hot water mode to the separate heating mode.

[0016] According to another aspect of the embodiments of the present invention, there is also provided a device for controlling the oil temperature of the compressor of an air conditioner, including: an acquisition unit, configured to acquire the operation data of the compressor after the compressor of the air conditioner operates for a predetermined duration, where the operation data includes: the bottom temperature value of the compressor, the pressure value of the compressor, and the bottom temperature value is the temperature of the bottom housing of the compressor; a first determination unit, configured to determine the heating operation mode of the air conditioner, where the heating operation mode represents the current heating method of the air conditioner; a second determination unit, configured to determine the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant in the compressor at the pressure value; a third determination unit, configured to determine the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode; and a control unit, configured to perform a heating process on the compressor according to the heating method to control the oil temperature of the compressor.

[0017] Optionally, the acquisition unit includes: a first acquisition module, configured to trigger a temperature sensing component to start detecting the temperature of the bottom housing of the compressor to obtain the bottom temperature value when the operation duration of the compressor reaches the predetermined duration; a second acquisition module, configured to acquire the exhaust pressure value of the compressor when the compressor is a high-pressure chamber compressor; and a third acquisition module, configured to acquire the suction pressure value of the compressor when the compressor is a low-pressure chamber compressor.

[0018] Optionally, the second determination unit includes: a first determination module, configured to determine the temperature difference between the bottom temperature value and the saturation temperature; and a second determination unit, configured to determine that the temperature difference is the superheat degree.

[0019] Optionally, the third determination unit includes: a fourth acquisition module, configured to acquire the current water temperature value of the water tank; a first comparison module, configured to compare the current water temperature value with a preset water temperature value to obtain a first comparison result; a second comparison module, configured to compare the superheat degree with a preset heat degree value to obtain a second comparison result; and a third determination module, configured to determine the heating method according to the first comparison result, the second comparison result, and the heating operation mode.

[0020] Optionally, when the heating operation mode is the heating and hot water mode or the independent hot water mode, the third determination module includes: a first determination sub-module, configured to determine, when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, that the heating method is: introducing hot water from the water tank to the bottom of the compressor housing until the superheat degree is greater than or equal to the set temperature value, where the hot water is water with a temperature value greater than the predetermined heating temperature value, and the set temperature value is the temperature value set when the compressor leaves the factory; a second determination sub-module, configured to determine, when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, that the heating method is: when heating the water tank until the current water temperature value reaches the preset water temperature value, if the superheat degree is still less than the preset superheat value, introducing the hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value.

[0021] Optionally, when the heating operation mode is the independent heating mode, the third determination module includes: a third determination sub-module, configured to determine, when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, that the heating method is: introducing hot water from the water tank to the bottom of the compressor housing until the temperature value of the water in the water tank drops to the preset temperature value of the water tank; a fourth determination sub-module, configured to determine, when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, that the heating method is: converting the independent heating mode to the heating and hot water mode.

[0022] Optionally, the compressor oil temperature control device of the air conditioner further includes: a stop module, configured to stop introducing hot water from the water tank to the bottom of the housing after introducing hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value.

[0023] Optionally, the compressor oil temperature control device of the air conditioner further includes: a first conversion module, configured to convert the independent heating mode to the heating and hot water mode when, in the independent heating mode, when introducing hot water from the water tank to the bottom of the housing, it is detected that the current water temperature value drops to the preset temperature value of the water tank and the superheat degree is less than the set temperature value.

[0024] Optionally, the compressor oil temperature control device of the air conditioner further includes: a second conversion module, configured to, after converting the separate heating mode to the heating and hot water mode, if it is detected that the bottom temperature value is greater than the set temperature value, stop introducing the hot water from the water tank to the bottom of the housing, and convert the heating and hot water mode to the separate heating mode.

[0025] According to another aspect of the embodiments of the present invention, there is also provided a compressor oil temperature control system, and the compressor oil temperature control system uses the compressor oil temperature control method of the air conditioner described in any one of the above.

[0026] According to another aspect of the embodiments of the present invention, there is also provided an air conditioner, and the air conditioner uses the compressor oil temperature control method of the air conditioner described in any one of the above.

[0027] According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium, and the computer-readable storage medium includes a stored program, wherein the program executes the compressor oil temperature control method of the air conditioner described in any one of the above.

[0028] According to another aspect of the embodiments of the present invention, there is also provided a processor, and the processor is used to run a program, wherein when the program runs, it executes the compressor oil temperature control method of the air conditioner described in any one of the above.

[0029] According to another aspect of the embodiments of the present invention, there is also provided a computer program product, including computer instructions, and when the computer instructions are executed by a processor, they execute the compressor oil temperature control method of the air conditioner described in any one of the above.

[0030] In an embodiment of the present invention, after the compressor of the air conditioner operates for a predetermined duration, the operating data of the compressor is acquired, where the operating data includes: the bottom temperature value of the compressor and the pressure value of the compressor, and the bottom temperature value is the temperature of the bottom housing of the compressor; the heating operation mode of the air conditioner is determined, where the heating operation mode represents the current heating method of the air conditioner; the superheat degree at the bottom of the compressor is determined according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant at the pressure value of the compressor; the heating method of the water tank of the air conditioner for the compressor is determined according to the superheat degree and the heating operation mode; the compressor is heated according to the heating method to control the oil temperature of the compressor. Through the above technical solution provided by the present invention, intelligent heating is achieved by precisely controlling the superheat degree at the bottom of the compressor and using the hot water in the water tank, so as to ensure that the compressor can maintain an ideal oil temperature in various operation modes, avoid problems such as oil dilution and liquid slugging, thereby improving the reliability and efficiency of the compressor, and further solving the technical problem in the related art that the compressor is prone to poor heat exchange under low temperature conditions, and refrigerant evaporation may be incomplete, resulting in low-temperature liquid refrigerant returning to the compressor, causing the compressor to start with liquid and liquid slugging, affecting the reliability of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation to the present invention. In the drawings:

[0032] Figure 1 is a hardware structure block diagram of a mobile terminal for a method of controlling the oil temperature of a compressor of an air conditioner according to an embodiment of the present invention;

[0033] Figure 2 is a flowchart of a method of controlling the oil temperature of a compressor of an air conditioner according to an embodiment of the present invention;

[0034] Figure 3 is a flowchart of an optional method of controlling the oil temperature of a compressor of an air conditioner according to an embodiment of the present invention;

[0035] Figure 4 is a working principle diagram of an air conditioner in a heating + hot water operation mode according to an embodiment of the present invention;

[0036] Figure 5 is a working principle diagram of an air conditioner in a separate hot water production operation mode according to an embodiment of the present invention;

[0037] Figure 6 is a working principle diagram of an air conditioner in a separate heating operation mode according to an embodiment of the present invention;

[0038] Figure 7Schematic diagram of the compressor oil temperature control device of the air conditioner according to an embodiment of the present invention. Detailed implementation manners

[0039] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0041] As introduced in the background art, in the related art, the compressor is prone to poor heat exchange under low temperature conditions, and the refrigerant may not evaporate completely, resulting in low temperature liquid refrigerant returning to the compressor, causing the compressor to start with liquid, resulting in liquid hammer, which affects the reliability of the whole machine. In the embodiments of the present invention, a method and device for controlling the oil temperature of the compressor of an air conditioner, a compressor oil temperature control system, an air conditioner, a computer-readable storage medium, a processor, and a computer program product are provided.

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0043] The method embodiments provided in the embodiments of the present invention can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 is the hardware structure block diagram of a mobile terminal of a method for controlling the oil temperature of the compressor of an air conditioner according to an embodiment of the present invention. As Figure 1 shown, the mobile terminal may include one or more ( Figure 1Only one processor 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data are shown. Among them, the above mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that Figure 1 The structure shown is only schematic and does not limit the structure of the above mobile terminal. For example, the mobile terminal may further include more or fewer components than those Figure 1 shown in, or have a different configuration from Figure 1 that shown.

[0044] The memory 104 can be used to store computer programs. For example, software programs and modules of application software, such as the computer program corresponding to the compressed oil temperature control method of the air conditioner in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely provided relative to the processor 102, and these remote memories can be connected to the mobile terminal through a network. Examples of the above network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one instance, the transmission device 106 includes a network adapter (abbreviated as NIC), which can be connected to other network devices through a base station and thus can communicate with the Internet. In one instance, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0045] Embodiment 1

[0046] According to an embodiment of the present invention, a method embodiment of a compressed oil temperature control method for an air conditioner is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0047] Figure 2 is a flowchart of a compressed oil temperature control method for an air conditioner according to an embodiment of the present invention, as Figure 2As shown, the method includes the following steps:

[0048] Step S202: After the compressor of the air conditioner runs for a predetermined duration, obtain the operating data of the compressor. The operating data includes: the bottom temperature value of the compressor and the pressure value of the compressor. The bottom temperature value is the temperature of the bottom housing of the compressor.

[0049] Optionally, the above operating data can be the data generated during the operation of the compressor of the air conditioner. For example, when the compressor in the air conditioner runs for 5 minutes, the system will read the data collected by the temperature sensor and pressure sensor at the bottom of the compressor. For example, the temperature at the bottom of the housing of the compressor (i.e., the bottom temperature value) and the pressure value of the compressor.

[0050] In this embodiment, if it is detected that the compressor has started running for 5 minutes, the bottom temperature value of the compressor can be detected and recorded as T0. And the suction pressure value P1 or the discharge pressure value P2 of the compressor can be detected (here, the type of the pressure value to be collected can be specifically determined according to the type of the compressor).

[0051] Step S204: Determine the heating operation mode of the air conditioner. The heating operation mode represents the current heating method of the air conditioner.

[0052] Optionally, the above heating operation mode can include but is not limited to: heating + hot water heating mode (heating and hot water mode), separate heating mode, and separate hot water heating mode.

[0053] Here, the heating operation mode of the air conditioner can be determined according to the operation mode set or selected by the user; of course, it can also be the heating operation mode determined by the system according to the user's living habits learned from historical data. For example, user A often takes a shower at 9 pm. At this time, the system will learn the heating operation mode of the air conditioner at this moment as the hot water heating mode according to the user's living habits.

[0054] Step S206: Determine the superheat at the bottom of the compressor according to the bottom temperature value and the saturation temperature. The saturation temperature is the temperature of the refrigerant in the compressor at the pressure value.

[0055] Optionally, the above superheat is the difference between the actual temperature of the refrigerant and its saturation temperature at the current pressure. The saturation temperature refers to the temperature at which the refrigerant is in a saturated state (i.e., in a gas-liquid equilibrium state) at a certain pressure, and the superheat means that the refrigerant temperature is higher than its saturation temperature and is in a superheated gas state.

[0056] In a compressor, superheat can prevent liquid refrigerant from entering the compressor and avoid the "liquid slugging" phenomenon, that is, the sudden pressure change caused by the incompressibility of the liquid refrigerant in the compressor, which may damage the compressor. Therefore, the superheat of the refrigerant before the compressor inlet is an important control parameter and needs to be maintained within a certain range.

[0057] Step S208: Determine the heating method of the water tank of the air conditioner for the compressor according to the superheat and the heating operation mode.

[0058] Here, it can be determined whether to draw hot water from the water tank to heat the bottom of the compressor and when to stop introducing the hot water according to the current heating mode and superheat.

[0059] Step S210: Heat the compressor according to the heating method to control the oil temperature of the compressor.

[0060] In the embodiment of the present invention, the air conditioner can be a heat recovery air conditioner. A new hot water pipe is added at the water outlet of the water tank of the heat recovery air conditioner and is connected to one end of the water pipe coiled around the bottom of the outdoor compressor housing. The hot water pipe has a heat preservation function to reduce heat dissipation during the transportation of hot water and ensure that the water temperature is high enough when the hot water reaches the bottom of the compressor. The water pipe at the bottom of the compressor housing has a heat transfer function, and introducing hot water into the water pipe can heat the bottom of the compressor. A new water inlet pipe is added at the water inlet of the water tank and is connected to the other end of the water pipe coiled around the bottom of the outdoor compressor housing, that is, the water heated for the compressor will flow back to the water tank to be consumed as domestic water.

[0061] As can be seen from the above, in the embodiment of the present invention, after the compressor of the air conditioner operates for a predetermined duration, the operation data of the compressor is obtained, where the operation data includes: the bottom temperature value of the compressor and the pressure value of the compressor. The bottom temperature value is the temperature of the bottom housing of the compressor; the heating operation mode of the air conditioner is determined, where the heating operation mode represents the current heating method of the air conditioner; the superheat at the bottom of the compressor is determined according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant in the compressor at the pressure value; the heating method of the water tank of the air conditioner for the compressor is determined according to the superheat and the heating operation mode; the compressor is heated according to the heating method to control the oil temperature of the compressor, realizing intelligent heating by precisely controlling the superheat at the bottom of the compressor and using the hot water in the water tank to ensure that the compressor can maintain an ideal oil temperature in various operation modes, avoiding problems such as oil dilution and liquid slugging, thereby improving the reliability and efficiency of the compressor. In addition, the additional electric heating cost is saved, and energy-saving operation is achieved.

[0062] Therefore, through the above technical solutions provided by the embodiments of the present invention, the problems in the related art are solved, where the compressor is prone to poor heat exchange under low temperature conditions, and incomplete evaporation of the refrigerant may occur, resulting in the return of the low-temperature liquid refrigerant to the compressor, causing the compressor to start with liquid, resulting in liquid hammer and affecting the reliability of the whole machine.

[0063] According to the above embodiments of the present invention, obtaining the operating data of the compressor may include: when the operating duration of the compressor reaches a predetermined duration, triggering the temperature sensing component to start to detect the temperature at the bottom of the compressor housing to obtain the bottom temperature value; when the compressor is a high-pressure chamber compressor, obtaining the exhaust pressure value of the compressor; when the compressor is a low-pressure chamber compressor, obtaining the suction pressure value of the compressor.

[0064] Here, mainly through the process of obtaining the operating data of the compressor, including the detection of the bottom temperature and pressure, the detection of the exhaust pressure and suction pressure of the high-pressure chamber and low-pressure chamber compressors is distinguished.

[0065] Among them, in a variable-frequency air conditioner, the types of hermetic variable-frequency compressors used can be divided into high-pressure chambers and low-pressure chambers according to the pressure state in the chamber. In the embodiments of the present invention, the compressor can be divided into a high-pressure chamber compressor and a low-pressure chamber compressor according to the pressure state in the chamber.

[0066] For a high-pressure chamber compressor, since the high-temperature and high-pressure gas discharged after compressing the refrigerant is first stored in the compressor chamber, if the saturation temperature corresponding to the pressure of the compressed refrigerant gas at this time is higher than the temperature inside the compressor, the high-temperature and high-pressure gas will be condensed by the lubricating oil and fused with the lubricating oil, diluting the lubricating oil. For a low-pressure chamber compressor, since the low-temperature and low-pressure gas inside it is first stored in the compressor chamber during the suction process of the compressor, if the saturation temperature corresponding to the pressure of the refrigerant gas before the compressor at this time is higher than the temperature inside the compressor, the low-temperature and low-pressure gas returning to the compression chamber will be condensed by the lubricating oil and fused with the lubricating oil, diluting the lubricating oil.

[0067] When the compressor is a high-pressure chamber compressor, the exhaust pressure value P2 of the compressor can be obtained; when the compressor is a low-pressure chamber compressor, the suction pressure value P1 of the compressor can be obtained.

[0068] In an exemplary application scenario, an internal temperature sensing component can be used to continuously monitor the temperature at the bottom of the compressor housing. Once the compressor has run for 5 minutes, the system automatically starts temperature detection. For a high-pressure chamber compressor, the pressure on the exhaust side is obtained; for a low-pressure chamber compressor, the pressure on the suction side is obtained.

[0069] Through the above technical solution, it can be ensured that in different types of compressors, the system can accurately measure the required pressure to calculate the saturation temperature of the refrigerant, and then calculate the superheat degree. By distinguishing the pressure measurements of the high-pressure chamber and the low-pressure chamber, the accuracy of the superheat degree calculation is guaranteed, and thus the heating control is made more precise.

[0070] According to the above embodiments of the present invention, determining the superheat degree at the bottom of the compressor based on the bottom temperature value and the saturation temperature includes: determining the temperature difference between the bottom temperature value and the saturation temperature; determining that the temperature difference is the superheat degree.

[0071] In the embodiments of the present invention, the above superheat degree = the bottom temperature of the compressor - the saturation temperature corresponding to the refrigerant under the current pressure.

[0072] The superheat degrees at the bottoms of these two types of compressors can be expressed as: the superheat degree at the bottom of the high-pressure chamber compressor = the bottom temperature of the compressor - the saturation temperature corresponding to the discharge pressure; the superheat degree at the bottom of the low-pressure chamber compressor = the bottom temperature of the compressor - the saturation temperature corresponding to the suction pressure.

[0073] Here, the calculation method of the superheat degree is clarified, ensuring that the system can correctly judge the superheat degree state at the bottom of the compressor based on the real-time bottom temperature and the saturation temperature under the corresponding pressure. Accurate superheat degree calculation is the basis of the entire control method, which helps the system to respond in a timely manner to the change in the bottom oil temperature of the compressor and take appropriate heating measures.

[0074] According to the above embodiments of the present invention, determining the heating method of the water tank of the air conditioner for the compressor based on the superheat degree and the heating operation mode includes: obtaining the current water temperature value of the water tank; comparing the current water temperature value with a preset water temperature value to obtain a first comparison result; comparing the superheat degree with a preset superheat value to obtain a second comparison result; determining the heating method according to the first comparison result, the second comparison result and the heating operation mode.

[0075] Here, the water temperature of the water tank, that is, the current water temperature value, can be monitored in real time, compared with the preset water temperature value, and at the same time, the superheat degree at the bottom of the compressor is compared with the preset superheat degree. According to the above two groups of comparison results and the current heating mode, it is decided whether to draw hot water from the water tank to heat the bottom of the compressor.

[0076] By setting preset thresholds for the water temperature and the superheat degree, the system can intelligently judge when to start heating and when to stop, avoiding ineffective heating or overheating. The dual-threshold control strategy improves the intelligence and adaptability of the system, which can not only ensure the normal operation of the compressor but also avoid energy waste.

[0077] According to the above embodiments of the present invention, when the heating operation mode is the heating and hot water mode or the separate hot water production mode, the heating method is determined according to the first comparison result, the second comparison result, and the heating operation mode, including: when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, it is determined that the heating method is: introducing hot water from the water tank to the bottom of the compressor housing until the superheat degree is greater than or equal to the set temperature value, where the hot water is water with a temperature value greater than the predetermined heating temperature value, and the set temperature value is the temperature value set when the compressor leaves the factory; when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, it is determined that the heating method is: when heating the water tank until the current water temperature value reaches the preset water temperature value, if the superheat degree is still less than the preset heat degree value, introducing hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value.

[0078] Here mainly describes the heating method when the heating operation mode of the air conditioner is the heating + hot water mode or the separate hot water production mode. The following will be described in detail with reference to the accompanying drawings.

[0079] Figure 3 is a flowchart of an optional method for controlling the oil temperature of the compressor of an air conditioner according to an embodiment of the present invention, as Figure 3 shown, when the air conditioner (i.e., the air conditioner) is heating, it can be divided into the following several modes: separate heating operation mode, heating + hot water operation mode, separate hot water production mode.

[0080] Among them, in the separate heating operation mode and the heating + hot water operation mode, when the compressor starts running for 5 minutes, the superheat degree △T at the bottom of the compressor and the hot water temperature (current water temperature value) of the water tank can be detected. When the heating operation mode of the air conditioner is the heating + hot water mode or the separate hot water production mode, if it is detected that the superheat degree △T at the bottom of the compressor ≤ 0 °C, and at the same time the hot water temperature T of the water tank is detected 水 ≥ preset temperature T 设水1 (assuming the preset water temperature is 45 °C) (preset water temperature value), then control the introduction of hot water from the water tank to the bottom of the compressor housing to heat the compressor until it is detected that the superheat degree at the bottom of the compressor ≥ the temperature value required by the compressor specification (i.e., the set temperature value), then stop the introduction of hot water and enter the normal heating operation mode.

[0081] In addition, if it is detected that the superheat degree △T at the bottom of the compressor > 0 °C, the heating runs normally. If it is detected that the superheat degree △T at the bottom of the compressor ≤ 0 °C, and the hot water temperature T of the water tank 水 < preset temperature T 设水1 (assuming the preset water temperature is 45 °C), then wait until the hot water temperature of the water tank is heated to meet the preset temperature T 设水1After detecting the superheat degree at the bottom of the compressor again, if the superheat degree △T at the bottom is still ≤ 0°C, then control the introduction of hot water to heat the compressor until the detected superheat degree at the bottom of the compressor ≥ the temperature value required by the compressor specification sheet, then stop introducing hot water and enter the normal heating operation mode.

[0082] The working principle of the above heating + hot water mode is as follows: The indoor unit heat exchanger and the water tank both act as condensers, and form a heating cycle system with the outdoor unit heat exchanger (evaporator), compressor, electronic expansion valve, four-way valve, solenoid valve, and check valve through the refrigerant pipeline; The working principle of the single heating mode is that the water tank does not participate in heat exchange, and the indoor unit heat exchanger acts as a condenser to form a heating cycle system with the outdoor unit heat exchanger (evaporator), compressor, electronic expansion valve, four-way valve, and solenoid valve through the refrigerant pipeline. The single hot water production mode is that the indoor heat exchanger does not participate in heat exchange, and the water tank acts as a condenser to form a heating cycle system with the outdoor unit heat exchanger (evaporator), compressor, electronic expansion valve, four-way valve, solenoid valve, and check valve through the refrigerant pipeline. These three heating operation modes can operate independently or can be switched with each other according to requirements.

[0083] Figure 4 It is the working principle diagram of the air conditioner according to the embodiment of the present invention in the heating + hot water operation mode, as Figure 4 shown, in the heating + hot water operation mode, open the solenoid valves 1, 2, and 3. The high-temperature and high-pressure gaseous refrigerant comes out of the compressor and is divided into two parts through the solenoid valves 1 and 2. Part of the refrigerant enters the indoor heat exchanger for heat exchange under the reversing action of the four-way valve, and part of the refrigerant directly enters the water tank for heat exchange; After being throttled by the electronic expansion valves 1 and 2 and then converging, the converged refrigerant enters the outdoor heat exchanger for heat exchange through the solenoid valve 3; The low-temperature and low-pressure refrigerant comes out of the outdoor heat exchanger and then returns to the compressor under the reversing action of the four-way valve, circulating repeatedly. A check valve is provided in the refrigerant pipeline coming out of the water tank, mainly to prevent the throttled refrigerant from flowing back into the water tank and disturbing the system circulation.

[0084] Figure 5 It is the working principle diagram of the air conditioner according to the embodiment of the present invention in the single hot water production operation mode, as Figure 5 shown, in the single hot water production operation mode, open the solenoid valves 2 and 3, and close the solenoid valve 1. The high-temperature and high-pressure gaseous refrigerant comes out of the compressor and directly enters the water tank through the solenoid valve 2 for heat exchange, so as to achieve the purpose of producing hot water. The normal temperature and high-pressure refrigerant comes out of the water tank, is throttled and depressurized by the electronic expansion valve 1, enters the outdoor heat exchanger, exchanges heat with the air, and finally forms a low-temperature and low-pressure refrigerant gas and returns to the compressor through the four-way valve, circulating repeatedly.

[0085] According to the above embodiments of the present invention, when the heating operation mode is the single heating mode, the heating method is determined according to the first comparison result, the second comparison result, and the heating operation mode, including: when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, it is determined that the heating method is: introducing hot water from the water tank to the bottom of the compressor housing until the temperature value of the water in the water tank drops to the preset temperature value of the water tank; when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, it is determined that the heating method is: converting the single heating mode to the heating and hot water mode.

[0086] As Figure 3 shown, when the air conditioner heating operation mode is the single heating mode, if it is detected that the superheat degree △T at the bottom of the compressor ≤ 0°C, and at the same time the hot water temperature T of the water tank is detected 水 ≥ the preset temperature T 设水1 (assuming the preset water temperature is 45°C), then control to introduce hot water from the water tank to the bottom of the compressor housing to heat the compressor until it is detected that the hot water temperature of the water tank drops to the preset temperature T 设水2 (assuming the preset water temperature is 35°C) (the preset temperature value of the water tank), and at the same time it is detected that the superheat degree at the bottom of the compressor ≥ the temperature value required by the compressor specification, then stop introducing hot water.

[0087] Figure 6 is the working principle diagram of the air conditioner according to the embodiments of the present invention in the single heating operation mode. As Figure 6 shown, in the single heating operation mode, open solenoid valves 1 and 3, close solenoid valve 2. The high-temperature and high-pressure gaseous refrigerant comes out of the compressor, passes through solenoid valve 1, and enters the indoor heat exchanger for heat exchange under the action of the four-way valve commutation. Then it is throttled and depressurized by electronic expansion valve 2, flows through solenoid valve 3 and enters the outdoor heat exchanger for evaporation and heat absorption. The low-temperature and low-pressure refrigerant comes out of the outdoor heat exchanger and returns to the compressor under the action of the four-way valve commutation to enter the next heating cycle.

[0088] According to the above embodiments of the invention, after introducing hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value, the compressor oil temperature control method of the air conditioner may further include: stopping introducing hot water from the water tank to the bottom of the housing.

[0089] Here, during the process of introducing hot water to heat the compressor, if it is detected that the superheat degree at the bottom of the compressor ≥ the temperature value required by the compressor specification, then stop introducing hot water. That is, after heating the bottom of the compressor to the required superheat degree, automatically stop introducing hot water.

[0090] According to the above embodiments of the present invention, when the heating operation mode is the single heating mode, the method for controlling the oil temperature of the compressor of the air conditioner further includes: when introducing hot water from the water tank to the bottom of the housing, if it is detected that the current water temperature value drops to the preset temperature value of the water tank and the superheat degree is less than the set temperature value, then convert the single heating mode to the heating and hot water mode.

[0091] If it is detected that the superheat degree △T at the bottom of the compressor ≤ 0°C and the hot water temperature T of the water tank 水 < the preset temperature T 设水1 , or when introducing hot water from the water tank to heat the compressor, the hot water temperature of the water tank drops to the preset temperature T 设水2 , and the superheat degree at the bottom of the compressor is still < the temperature value required by the compressor specification book, then convert the single heating operation mode to the heating + hot water mode, increase the hot water temperature, increase the water temperature of the water pipe introduced to the bottom of the compressor, thereby increasing the temperature of the compressor. Until it is detected that the superheat degree at the bottom of the compressor > the temperature value required by the compressor specification book, then stop introducing hot water, and convert the heating + hot water mode to the original single heating operation mode for normal operation.

[0092] According to the above embodiments of the present invention, the method for controlling the oil temperature of the compressor of the air conditioner further includes: after converting the single heating mode to the heating and hot water mode, if it is detected that the bottom temperature value is greater than the set temperature value, then stop introducing hot water from the water tank to the bottom of the housing, and convert the heating and hot water mode to the single heating mode.

[0093] Here until it is detected that the superheat degree at the bottom of the compressor > the temperature value required by the compressor specification book, then stop introducing hot water, and convert the heating + hot water mode to the original single heating operation mode for normal operation.

[0094] In an exemplary scenario, on a cold winter morning when the outdoor temperature is below zero, a household user turns on the heat recovery air-conditioning system for heating. At this time, the compressor has been running for 5 minutes, and the control system starts to detect the temperature and pressure values at the bottom of the compressor to evaluate the superheat degree. Assuming that the compressor is of the high-pressure chamber type, the bottom temperature is 5°C, and the saturation temperature corresponding to the discharge pressure is 10°C, then the superheat degree at this time is -5°C. At the same time, the current water temperature in the water tank is measured to be 48°C, which is higher than the preset water temperature value T_set_water1 (45°C), but the superheat degree at the bottom of the compressor is lower than the preset superheat degree value (0°C). According to the current measurement results, the control system immediately reacts and opens the hot water pipeline valve from the water tank to the bottom of the compressor housing, and starts to transport hot water for heating. The temperature of the hot water (48°C) is much higher than the current temperature at the bottom of the compressor housing, so the oil temperature at the bottom of the compressor can be quickly increased. As time goes by, the bottom temperature gradually rises, and the superheat degree also rises. When the superheat degree reaches the set temperature value (5°C), the control system automatically closes the hot water pipeline valve and stops heating. At this time, the oil temperature at the bottom of the compressor has reached a level that can ensure the normal operation of the compressor without worrying about refrigerant oil dissolution and liquid hammer. The entire air-conditioning system switches to a stable and efficient heating operation mode.

[0095] After several hours, with the continuous use of the hot water in the water tank and the further drop of the external environmental temperature, the water temperature in the water tank gradually drops to 30°C, which is lower than the preset water temperature value T_set_water2 (35°C) of the water tank. At the same time, the temperature at the bottom of the compressor also drops, and the superheat degree drops below 0°C again when detected. At this time, the air-conditioning system automatically recognizes the current situation that the water temperature in the water tank no longer meets the heating requirements. According to the preset logic, the system will switch from the single heating mode to the heating and hot water mode, start the water tank heating program, and raise the water temperature until it meets the preset water temperature value T_set_water1 (45°C). During this period, when the hot water temperature in the water tank is lower than 45°C, the system will not try to directly introduce hot water from the water tank for heating, but focus on raising the water temperature in the water tank until suitable heating conditions are reached. Here, it is possible to intelligently and precisely control the oil temperature of the compressor under different environmental conditions, effectively avoiding energy waste caused by overheating and unnecessary compressor losses. At the same time, by timely switching the operation mode, it is possible to maximize the use of the hot water resources in the water tank while ensuring the safe operation of the compressor, achieving the operation goals of high efficiency, energy saving and environmental protection. Especially in extremely cold weather, this control logic can significantly improve the stability and user comfort of the air-conditioning system, avoid compressor start-up delay and operation failures, and ensure the efficient operation of the heat recovery air-conditioning system under various working conditions.

[0096] In the above manner, the heating control logic is refined. In the heating and hot water supply mode or the single hot water supply mode, only when the water temperature in the water tank reaches the preset heating temperature (e.g., 45°C) and the superheat at the bottom of the compressor is less than or equal to the preset superheat value (e.g., 0°C), hot water is introduced from the water tank to heat the bottom of the compressor. If the water temperature in the water tank does not reach the preset heating temperature and the superheat at the bottom of the compressor is still low, the water tank is first heated to the preset temperature, then the superheat at the bottom of the compressor is checked, and then it is decided whether to introduce hot water for heating. After heating the bottom of the compressor to the required superheat, the introduction of hot water is automatically stopped. In the single heating mode, if the water temperature in the water tank is lower than the preset heating temperature and the superheat at the bottom of the compressor is insufficient, the system will automatically switch to the heating and hot water supply mode to increase the hot water temperature and heat the bottom of the compressor; when the preset superheat is reached, the system returns to the single heating mode.

[0097] This mainly describes how to intelligently adjust the heating strategy according to the changes in the water temperature in the water tank and the superheat at the bottom of the compressor in different heating operation modes, so as to ensure that the compressor can maintain an ideal oil temperature in various operation modes. By dynamically adjusting the heating strategy and operation mode, not only the reliability problem of the compressor running at low temperature is solved, but also the hot water resources in the water tank are utilized to the greatest extent, improving the overall energy efficiency of the system, reducing energy consumption, and realizing energy-saving operation.

[0098] As can be seen from the above, in the embodiment of the present invention, by introducing the hot water in the heat recovery air-conditioning water tank to the bottom of the compressor housing (using the hot water in the heat recovery air-conditioning water tank to be coiled around the bottom of the compressor housing through a water pipe), the oil temperature at the bottom of the compressor housing is heated, the temperature of the compressor is increased, the problem that the liquid refrigerant dilutes the lubricating oil after returning to the compressor, resulting in poor lubrication between the compressor parts and serious wear, is reduced, and the problem of liquid slugging caused by the low temperature at the bottom of the compressor in low-temperature working conditions can be well solved, ensuring the reliability of the compressor running at low temperature.

[0099] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0100] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present application.

[0101] Embodiment 2

[0102] According to an embodiment of the present invention, there is also provided an oil temperature control device for a compressor of an air conditioner for implementing the oil temperature control method of the compressor of the air conditioner described above. Figure 7 is a schematic diagram of an oil temperature control device for a compressor of an air conditioner according to an embodiment of the present invention, as Figure 7 shown. The oil temperature control device for the compressor of the air conditioner includes: an acquisition unit 701, a first determination unit 703, a second determination unit 705, a third determination unit 707, and a control unit 709. The device will be described in detail below.

[0103] The acquisition unit 701 is configured to acquire the operation data of the compressor after the compressor of the air conditioner has run for a predetermined duration. The operation data includes: the bottom temperature value of the compressor and the pressure value of the compressor. The bottom temperature value is the temperature of the bottom housing of the compressor.

[0104] The first determination unit 703 is configured to determine the heating operation mode of the air conditioner, where the heating operation mode represents the current heating method of the air conditioner.

[0105] The second determination unit 705 is configured to determine the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant in the compressor at the pressure value.

[0106] The third determination unit 707 is configured to determine the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode.

[0107] The control unit 709 is configured to perform a heating process on the compressor according to the heating method to control the oil temperature of the compressor.

[0108] It should be noted here that the above-mentioned acquisition unit 701, first determination unit 703, second determination unit 705, third determination unit 707, and control unit 709 correspond to steps S202 to S210 in the above embodiment. The examples and application scenarios implemented by the five units and the corresponding steps are the same, but are not limited to the content disclosed in the above embodiment.

[0109] As can be seen from the above, in the solution described in the above embodiment of the present invention, the acquisition unit can be used to acquire the operating data of the compressor after the compressor of the air conditioner has run for a predetermined duration. The operating data includes: the bottom temperature value of the compressor and the pressure value of the compressor. The bottom temperature value is the temperature of the bottom housing of the compressor. Then, the first determination unit is used to determine the heating operation mode of the air conditioner, where the heating operation mode represents the current heating method of the air conditioner. Then, the second determination unit is used to determine the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant at the pressure value of the compressor. Then, the third determination unit is used to determine the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode. And the control unit is used to heat the compressor according to the heating method to control the oil temperature of the compressor, realizing intelligent heating by precisely controlling the superheat degree at the bottom of the compressor and using the hot water in the water tank to ensure that the compressor can maintain an ideal oil temperature in various operation modes, avoiding problems such as oil dilution and liquid slugging, thereby improving the reliability and efficiency of the compressor. In addition, it also saves additional electric heating costs and realizes energy-saving operation.

[0110] Therefore, through the above technical solution provided by the embodiment of the present invention, the problem in the related art that the compressor is prone to poor heat exchange under low temperature conditions, and refrigerant evaporation may be incomplete, resulting in low-temperature liquid refrigerant returning to the compressor, causing the compressor to start with liquid and liquid slugging, affecting the reliability of the whole machine, is solved.

[0111] Optionally, the acquisition unit includes: a first acquisition module, configured to trigger the temperature sensing component to start detecting the temperature of the bottom of the compressor housing to obtain the bottom temperature value when the operation duration of the compressor reaches the predetermined duration; a second acquisition module, configured to obtain the exhaust pressure value of the compressor when the compressor is a high-pressure chamber compressor; and a third acquisition module, configured to obtain the suction pressure value of the compressor when the compressor is a low-pressure chamber compressor.

[0112] Optionally, the second determination unit includes: a first determination module, configured to determine the temperature difference between the bottom temperature value and the saturation temperature; and a second determination unit, configured to determine that the temperature difference is the superheat degree.

[0113] Optionally, the third determination unit includes: a fourth acquisition module, configured to acquire the current water temperature value of the water tank; a first comparison module, configured to compare the current water temperature value with a preset water temperature value to obtain a first comparison result; a second comparison module, configured to compare the superheat with a preset superheat value to obtain a second comparison result; and a third determination module, configured to determine the heating method according to the first comparison result, the second comparison result, and the heating operation mode.

[0114] Optionally, when the heating operation mode is the heating and hot water mode or the independent hot water heating mode, the third determination module includes: a first determination sub-module, configured to, when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat is less than or equal to the preset superheat value, determine the heating method as: introducing hot water from the water tank to the bottom of the compressor housing until the superheat is greater than or equal to the set temperature value, where the hot water is water with a temperature value greater than the predetermined heating temperature value, and the set temperature value is the temperature value set when the compressor leaves the factory; a second determination sub-module, configured to, when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat is less than or equal to the preset superheat value, determine the heating method as: when heating the water tank until the current water temperature value reaches the preset water temperature value, if the superheat is still less than the preset superheat value, introducing hot water from the water tank to the bottom of the housing until the superheat is greater than or equal to the set temperature value.

[0115] Optionally, when the heating operation mode is the independent heating mode, the third determination module includes: a third determination sub-module, configured to, when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat is less than or equal to the preset superheat value, determine the heating method as: introducing hot water from the water tank to the bottom of the compressor housing until the temperature value of the water in the water tank drops to the preset temperature value of the water tank; a fourth determination sub-module, configured to, when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat is less than or equal to the preset superheat value, determine the heating method as: converting the independent heating mode to the heating and hot water mode.

[0116] Optionally, the compressor oil temperature control device of the air conditioner further includes: a stop module, configured to stop introducing hot water from the water tank to the bottom of the housing after introducing hot water from the water tank to the bottom of the housing until the superheat is greater than or equal to the set temperature value.

[0117] Optionally, the compressor oil temperature control device of the air conditioner further includes: a first conversion module, configured to, when the heating operation mode is the independent heating mode, when introducing hot water from the water tank to the bottom of the housing, if it is detected that the current water temperature value drops to the preset temperature value of the water tank and the superheat is less than the set temperature value, convert the independent heating mode to the heating and hot water mode.

[0118] Optionally, the compressor oil temperature control device of the air conditioner further includes: a second conversion module, configured to, after converting the independent heating mode to the heating and hot water mode, if it is detected that the bottom temperature value is greater than the set temperature value, stop introducing hot water from the water tank to the bottom of the housing, and convert the heating and hot water mode to the independent heating mode.

[0119] According to another aspect of the embodiments of the present invention, there is also provided a compressor oil temperature control system, which uses the compressor oil temperature control method of any one of the above-mentioned air conditioners.

[0120] According to another aspect of the embodiments of the present invention, there is also provided an air conditioner, which uses the compressor oil temperature control method of any one of the above-mentioned air conditioners.

[0121] According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium, which includes a stored program, wherein the program executes the compressor oil temperature control method of any one of the above-mentioned air conditioners.

[0122] Optionally, in this embodiment, the above computer-readable storage medium may be located in any one of the computer terminals in the computer terminal group in the computer network, or in any one of the communication devices in the communication device group.

[0123] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: after the compressor of the air conditioner runs for a predetermined duration, obtain the operation data of the compressor, wherein the operation data includes: the bottom temperature value of the compressor, the pressure value of the compressor, and the bottom temperature value is the temperature of the bottom housing of the compressor; determine the heating operation mode of the air conditioner, wherein the heating operation mode represents the current heating method of the air conditioner; determine the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature, wherein the saturation temperature is the temperature of the refrigerant in the compressor at the pressure value; determine the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode; perform heating treatment on the compressor according to the heating method to control the oil temperature of the compressor.

[0124] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when the operation duration of the compressor reaches a predetermined duration, trigger the temperature sensing component to start to detect the temperature of the bottom of the housing of the compressor to obtain the bottom temperature value; when the compressor is a high-pressure chamber compressor, obtain the discharge pressure value of the compressor; when the compressor is a low-pressure chamber compressor, obtain the suction pressure value of the compressor.

[0125] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determining the temperature difference between the bottom temperature value and the saturation temperature; determining that the temperature difference is the superheat degree.

[0126] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the current water temperature value of the water tank; comparing the current water temperature value with a preset water temperature value to obtain a first comparison result; comparing the superheat degree with a preset heat degree value to obtain a second comparison result; determining the heating method according to the first comparison result, the second comparison result, and the heating operation mode.

[0127] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, determining the heating method as: introducing hot water from the water tank to the bottom of the compressor housing until the superheat degree is greater than or equal to the set temperature value, where the hot water is water with a temperature value greater than the predetermined heating temperature value, and the set temperature value is the temperature value set when the compressor leaves the factory; when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, determining the heating method as: when heating the water tank until the current water temperature value reaches the preset water temperature value, if the superheat degree is still less than the preset heat degree value, introducing hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value.

[0128] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, determining the heating method as: introducing hot water from the water tank to the bottom of the compressor housing until the temperature value of the water in the water tank drops to the preset temperature value of the water tank; when the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, determining the heating method as: switching the single heating mode to the heating and hot water mode.

[0129] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after introducing hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value, stopping introducing hot water from the water tank to the bottom of the housing.

[0130] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: When the heating operation mode is the separate heating mode, when introducing hot water from the water tank to the bottom of the housing, if it is detected that the current water temperature value drops to the preset temperature value of the water tank and the superheat degree is less than the set temperature value, then convert the separate heating mode to the heating and hot water mode.

[0131] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: After converting the separate heating mode to the heating and hot water mode, if it is detected that the bottom temperature value is greater than the set temperature value, then stop introducing hot water from the water tank to the bottom of the housing, and convert the heating and hot water mode to the separate heating mode.

[0132] According to another aspect of the embodiments of the present invention, a processor is further provided. The processor is used to run a program, wherein when the program runs, it executes the compressor oil temperature control method of the air conditioner in any one of the above.

[0133] According to another aspect of the embodiments of the present invention, a computer program product is further provided, including computer instructions. When the computer instructions are executed by a processor, they execute the compressor oil temperature control method of the air conditioner in any one of the above.

[0134] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0135] In the above embodiments of the present invention, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0136] In the several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed with each other can be through some interfaces. The indirect couplings or communication connections of the units or modules can be in an electrical or other form.

[0137] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0138] In addition, in each embodiment of the present invention, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0139] If the above-mentioned 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 computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store program codes.

[0140] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for controlling the oil temperature of a compressor in an air conditioner, characterized in that, Including: After the compressor of the air conditioner operates for a predetermined duration, obtain the operating data of the compressor, where the operating data includes: the bottom temperature value of the compressor and the pressure value of the compressor, and the bottom temperature value is the temperature of the bottom housing of the compressor; Determine the heating operation mode of the air conditioner, where the heating operation mode represents the current heating method of the air conditioner; Determine the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant in the compressor under the pressure value; Determine the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode; Heat the compressor according to the heating method to control the oil temperature of the compressor.

2. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 1, wherein Obtaining the operating data of the compressor includes: When the operating duration of the compressor reaches the predetermined duration, trigger the temperature sensing component to start to detect the temperature of the bottom of the housing of the compressor to obtain the bottom temperature value; When the compressor is a high-pressure chamber compressor, obtain the exhaust pressure value of the compressor; When the compressor is a low-pressure chamber compressor, obtain the suction pressure value of the compressor.

3. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 1, wherein, Determining the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature includes: Determine the temperature difference between the bottom temperature value and the saturation temperature; Determine that the temperature difference is the superheat degree.

4. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 1, characterized in that, Determining the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode includes: Obtain the current water temperature value of the water tank; Compare the current water temperature value with a preset water temperature value to obtain a first comparison result; Compare the superheat degree with a preset heat degree value to obtain a second comparison result; Determine the heating method according to the first comparison result, the second comparison result, and the heating operation mode.

5. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 4, characterized in that When the heating operation mode is the heating and hot water mode or the independent hot water mode, determining the heating method according to the first comparison result, the second comparison result, and the heating operation mode includes: When the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, determine that the heating method is: introduce hot water from the water tank to the bottom of the housing of the compressor until the superheat degree is greater than or equal to the set temperature value, where the hot water is water with a temperature value greater than the predetermined heating temperature value, and the set temperature value is the temperature value set when the compressor leaves the factory; When the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset heat degree value, determine that the heating method is: when heating the water tank until the current water temperature value reaches the preset water temperature value, if the superheat degree is still less than the preset heat degree value, introduce the hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value.

6. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 4, characterized in that, When the heating operation mode is the single heating mode, determining the heating method according to the first comparison result, the second comparison result, and the heating operation mode includes: When the first comparison result is that the current water temperature value is greater than or equal to the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, it is determined that the heating method is: introducing hot water from the water tank to the bottom of the compressor housing until the temperature value of the water in the water tank drops to the preset temperature value of the water tank; When the first comparison result is that the current water temperature value is less than the preset water temperature value and the second comparison result is that the superheat degree is less than or equal to the preset superheat value, it is determined that the heating method is: converting the single heating mode to the heating and hot water mode.

7. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 5, characterized in that, After introducing the hot water from the water tank to the bottom of the housing until the superheat degree is greater than or equal to the set temperature value, it further includes: stopping introducing the hot water from the water tank to the bottom of the housing.

8. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 6, wherein, When the heating operation mode is the single heating mode, it further includes: When introducing the hot water from the water tank to the bottom of the housing, if it is detected that the current water temperature value drops to the preset temperature value of the water tank and the superheat degree is less than the set temperature value, then convert the single heating mode to the heating and hot water mode.

9. The method for controlling the oil temperature of the compressor of the air conditioner according to claim 8, wherein, It further includes: After converting the single heating mode to the heating and hot water mode, if it is detected that the bottom temperature value is greater than the set temperature value, then stop introducing the hot water from the water tank to the bottom of the housing, and convert the heating and hot water mode to the single heating mode.

10. An oil temperature control device for a compressor of an air conditioner, characterized in that, It includes: An acquisition unit, configured to acquire the operation data of the compressor after the compressor of the air conditioner operates for a predetermined duration, where the operation data includes: the bottom temperature value of the compressor, the pressure value of the compressor, and the bottom temperature value is the temperature of the bottom housing of the compressor; A first determination unit, configured to determine the heating operation mode of the air conditioner, where the heating operation mode represents the current heating method of the air conditioner; A second determination unit, configured to determine the superheat degree at the bottom of the compressor according to the bottom temperature value and the saturation temperature, where the saturation temperature is the temperature of the refrigerant in the compressor at the pressure value; A third determination unit, configured to determine the heating method of the water tank of the air conditioner for the compressor according to the superheat degree and the heating operation mode; A control unit, configured to perform heating processing on the compressor according to the heating method to control the oil temperature of the compressor.

11. An oil temperature control system for a compressor, characterized in that, The compressor oil temperature control system uses the compressor oil temperature control method of the air conditioner according to any one of claims 1 to 9 above.

12. An air conditioner, characterized in that, The air conditioner uses the compressor oil temperature control method of the air conditioner according to any one of claims 1 to 9 above.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, where the program executes the compressor oil temperature control method of the air conditioner according to any one of claims 1 to 9 above.

14. A processor, characterized in that, The processor is used to run a program, wherein when the program runs, it executes the compressor oil temperature control method of the air conditioner according to any one of claims 1 to 9.

15. A computer program product comprising computer instructions, characterized in that, When the computer instructions are executed by the processor, they execute the compressor oil temperature control method of the air conditioner according to any one of claims 1 to 9.

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