Compressor protection method, apparatus, device, vehicle, storage medium and product

Abstract

The present disclosure relates to a compressor protection method, device, equipment, vehicle, storage medium and product. The method comprises: obtaining an actual exhaust superheat degree and an allowable exhaust superheat degree of the compressor; and performing a superheat protection operation on the compressor according to the actual exhaust superheat degree and the allowable exhaust superheat degree of the compressor. According to the actual exhaust superheat degree and the allowable exhaust superheat degree of the compressor, the state of the compressor can be determined. When it is determined that the compressor will be in an oil shortage state, the superheat protection operation can be performed in time to avoid excessive wear of the compressor, to protect the compressor in advance, to ensure that the compressor is always in a good operating state, to effectively reduce the durability damage of the compressor due to oil shortage, to improve the user experience, and to reduce the after-sales cost.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and in particular to a compressor protection method, device, equipment, vehicle, storage medium, and product. Background Technology

[0002] Thermal management is a crucial aspect of low-temperature range operation for electric vehicles, significantly impacting overall vehicle energy efficiency. The compressor, as the heart of the heat pump system, benefits from reduced failure rates, which in turn lowers after-sales costs, reduces overall vehicle failure rates, and improves user experience. Current technologies primarily use compressor discharge temperature or pressure as protection conditions. However, when these conditions are triggered, the compressor may already be low on oil, showing signs of wear or scratches. Traditional methods cannot predict oil shortages in advance, leading to the compressor constantly operating at high loads. Because the compressor operates near its safety limits, it is prone to malfunction. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a compressor protection method, device, equipment, vehicle, storage medium, and product.

[0004] According to a first aspect of the present disclosure, a compressor protection method is provided, comprising: Obtain the actual discharge superheat of the compressor; Obtain the allowable exhaust superheat of the compressor; The state of the compressor is determined based on the actual exhaust superheat and the allowable exhaust superheat. If the compressor is determined to be in a state of oil shortage, an overheat protection operation is performed on the compressor.

[0005] In one embodiment, obtaining the actual exhaust superheat of the compressor includes: Obtain the exhaust temperature of the compressor; Obtain the discharge pressure saturation temperature of the compressor; The actual exhaust superheat of the compressor is obtained based on the exhaust temperature and the exhaust pressure saturation temperature.

[0006] In one embodiment, obtaining the allowable exhaust superheat of the compressor includes: Obtain the refrigerant flow rate of the compressor; The allowable discharge superheat of the compressor is determined based on the refrigerant flow rate of the compressor.

[0007] In one embodiment, obtaining the refrigerant flow rate of the compressor includes: Obtain the refrigerant density of the compressor; Obtain the displacement of the compressor; Obtain the rotational speed of the compressor; Obtain the volumetric efficiency of the compressor; The refrigerant flow rate of the compressor is obtained based on the refrigerant density, the compressor displacement, the compressor speed, and the volumetric efficiency.

[0008] In one embodiment, obtaining the volumetric efficiency of the compressor includes: The volumetric efficiency of the compressor is determined based on the compressor's rotational speed, refrigerant low pressure, refrigerant high pressure, and the mapping relationship between the refrigerant pressure and the volumetric efficiency. The mapping relationship includes the volumetric efficiency of the compressor at different rotational speeds, different refrigerant low pressures, different refrigerant high pressures, and different refrigerant pressure ratios. The refrigerant pressure ratio is the ratio of the refrigerant high pressure to the refrigerant low pressure.

[0009] In one embodiment, determining the allowable discharge superheat of the compressor based on the refrigerant flow rate of the compressor includes: The allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor.

[0010] In one embodiment, determining the allowable discharge superheat of the compressor based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor includes: Identify application mode scenarios, which include any one of the following: cooling mode scenario, dehumidification mode scenario, heating mode scenario, and three heat source mode scenario; Based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor corresponding to the application mode scenario, the allowable discharge superheat of the compressor is determined.

[0011] In one embodiment, determining the state of the compressor based on the actual discharge superheat of the compressor and the allowable discharge superheat includes: Obtain the superheat difference between the actual exhaust superheat and the allowable exhaust superheat; The state of the compressor is determined based on the superheat difference.

[0012] In one embodiment, determining the state of the compressor based on the superheat difference includes: Obtain the cumulative time during which the superheat difference is greater than zero; If the cumulative time exceeds the risk threshold, the compressor is determined to be in a state of oil shortage.

[0013] In one implementation, the thermal protection operation includes oil return or shutdown.

[0014] According to a second aspect of the present disclosure, a compressor protection device is provided, comprising: The first acquisition module is configured to acquire the actual exhaust superheat of the compressor; The second acquisition module is configured to acquire the allowable exhaust superheat of the compressor; The determination module is configured to determine the state of the compressor based on the actual exhaust superheat and the allowable exhaust superheat; The protection module is configured to perform overheat protection operation on the compressor when it is determined that the compressor is in a state of oil shortage.

[0015] According to a third aspect of the present disclosure, an electronic device is provided, comprising: processor; Memory used to store processor-executable instructions; The processor is configured to execute the executable instructions to implement the method described in any one of the first aspects.

[0016] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising: the electronic equipment and compressor described in the third aspect.

[0017] According to a fifth aspect of the present disclosure, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the steps of the method described in any one of the first aspects.

[0018] According to a sixth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0019] In summary, this disclosure provides a compressor protection method, including: obtaining the actual discharge superheat and allowable discharge superheat of the compressor; and performing overheat protection on the compressor based on the actual discharge superheat and allowable discharge superheat. This disclosure allows for early detection of whether the compressor is about to enter an oil shortage state by using the actual discharge superheat and allowable discharge superheat. Timely overheat protection when an oil shortage is detected can prevent excessive wear on the compressor, protect the compressor in advance, ensure the compressor is always in good operating condition, effectively reduce durability damage caused by oil shortage, improve user experience, and reduce after-sales costs.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0022] Figure 1 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0023] Figure 2 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0024] Figure 3 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0025] Figure 4 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0026] Figure 5 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0027] Figure 6 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0028] Figure 7 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0029] Figure 8 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0030] Figure 9 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment.

[0031] Figure 10 This is a block diagram illustrating a compressor protection device according to an exemplary embodiment.

[0032] Figure 11 This is a block diagram illustrating an electronic device according to an exemplary embodiment.

[0033] Figure 12 This is a block diagram illustrating a vehicle according to an exemplary embodiment. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0035] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0036] It should be noted that the concepts of "first," "second," etc., mentioned in this disclosure are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies. The modifiers "a" and "a plurality of" mentioned in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless explicitly stated in the context, they should be understood as "one or more." In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more, and other quantifiers are similar; "at least one," "one or more," or similar expressions refer to any combination of these items, including any combination of single or multiple items.

[0037] Although operations or steps are described in a specific order in the accompanying drawings in the embodiments of this disclosure, it should not be construed as requiring these operations or steps to be performed in the specific order or serial order shown, or requiring all of the shown operations or steps to be performed to obtain the desired result. In the embodiments of this disclosure, these operations or steps may be performed serially; they may be performed in parallel; or a portion of these operations or steps may be performed.

[0038] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of these messages or information. It is understood that before using the technical solutions disclosed in the embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained. The disclosure will now be described in conjunction with specific embodiments.

[0039] Figure 1This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 1 As shown, this disclosure provides a compressor protection method, which may include the following steps: In step S10, the actual exhaust superheat of the compressor is obtained.

[0040] In this step, the actual discharge superheat of the compressor is obtained. For example, the discharge temperature of the compressor can be obtained first, then the discharge pressure saturation temperature of the compressor can be obtained, and then the actual discharge superheat of the compressor can be obtained based on the discharge temperature and the discharge pressure saturation temperature.

[0041] In step S20, the allowable exhaust superheat of the compressor is obtained.

[0042] In this step, the allowable discharge superheat of the compressor is obtained. For example, the refrigerant flow rate of the compressor can be obtained first, and then the allowable discharge superheat of the compressor can be determined based on the refrigerant flow rate.

[0043] In step S30, the state of the compressor is determined based on the actual exhaust superheat and the allowable exhaust superheat.

[0044] In this step, the compressor status is determined based on the actual exhaust superheat and the allowable exhaust superheat. For example, the superheat difference between the actual and allowable exhaust superheat can be obtained first, and then the compressor status can be determined based on this difference. The compressor status includes whether the compressor is short of oil.

[0045] In step S40, if it is determined that the compressor is in a state of oil shortage, an overheat protection operation is performed on the compressor.

[0046] In this step, if the compressor is determined to be short of oil, an overheat protection operation is performed on the compressor. For example, overheat protection may include oil return or shutdown. For instance, if the compressor is determined to be short of oil, timely oil return or shutdown operations can be performed to reduce wear and damage to the compressor due to oil shortage, effectively reducing the compressor's failure rate and saving maintenance costs. The compressor may be a compressor in a heat pump system, an air conditioning system, or another system; this disclosure does not limit this.

[0047] In one possible implementation, thermal protection operation may include oil return or shutdown.

[0048] In summary, this disclosure provides a compressor protection method, including: obtaining the actual discharge superheat and allowable discharge superheat of the compressor; and performing overheat protection on the compressor based on the actual discharge superheat and allowable discharge superheat. This disclosure allows for early detection of whether the compressor is about to enter an oil shortage state by using the actual discharge superheat and allowable discharge superheat. Timely overheat protection when an oil shortage is detected can prevent excessive wear on the compressor, protect the compressor in advance, ensure the compressor is always in good operating condition, effectively reduce durability damage caused by oil shortage, improve user experience, and reduce after-sales costs.

[0049] Figure 2 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 2 As shown, obtaining the actual exhaust superheat of the compressor may include the following steps: In step S101, the exhaust temperature of the compressor is obtained.

[0050] In this step, the compressor's exhaust temperature α is obtained.

[0051] In step S102, the exhaust pressure saturation temperature of the compressor is obtained.

[0052] In this step, the discharge pressure saturation temperature β of the compressor is obtained.

[0053] In step S103, the actual exhaust superheat of the compressor is obtained based on the exhaust temperature and the exhaust pressure saturation temperature.

[0054] In this step, the actual exhaust superheat γ of the compressor is obtained based on the exhaust temperature α and the exhaust pressure saturation temperature β. For example, the actual exhaust superheat γ of the compressor can be obtained by the following formula: γ=α β Formula 1 The unit for the actual exhaust superheat γ can be Kelvin.

[0055] Figure 3 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 3 As shown, obtaining the allowable exhaust superheat of the compressor may include the following steps: In step S201, the refrigerant flow rate of the compressor is obtained.

[0056] In this step, the refrigerant flow rate of the compressor is obtained. For example, the refrigerant density of the compressor can be obtained first, followed by the compressor displacement, then the compressor speed, then the compressor volumetric efficiency, and finally the refrigerant flow rate of the compressor can be obtained based on the refrigerant density, compressor displacement, compressor speed, and volumetric efficiency.

[0057] In step S202, the allowable discharge superheat of the compressor is determined based on the refrigerant flow rate of the compressor.

[0058] In this step, the allowable discharge superheat of the compressor is determined based on the refrigerant flow rate of the compressor. For example, the allowable discharge superheat of the compressor can be determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor.

[0059] Figure 4 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 4 As shown, obtaining the refrigerant flow rate of the compressor may include the following steps: In step S2011, the refrigerant density of the compressor is obtained.

[0060] In this step, the refrigerant density ρ of the compressor is obtained.

[0061] In step S2012, the displacement of the compressor is obtained.

[0062] In this step, the compressor's displacement φ is obtained.

[0063] In step S2013, the rotational speed of the compressor is obtained.

[0064] In this step, the compressor speed ν is obtained.

[0065] In step S2014, the volumetric efficiency of the compressor is obtained.

[0066] In this step, the volumetric efficiency η of the compressor is obtained.

[0067] In step S2015, the refrigerant flow rate of the compressor is obtained based on the refrigerant density, the compressor displacement, the compressor speed, and the volumetric efficiency.

[0068] In this step, the refrigerant flow rate Ψ of the compressor is obtained based on the refrigerant density ρ, the compressor displacement φ, the compressor speed ν, and the volumetric efficiency η. For example, the refrigerant flow rate Ψ of the compressor can be obtained by the following formula: Ψ=ρ×φ×ν×60 / 1000000×η Formula 2 Figure 5 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 5 As shown, obtaining the volumetric efficiency of the compressor may include the following steps: In step S20141, the volumetric efficiency of the compressor is determined based on the compressor speed, the compressor refrigerant low pressure, the compressor refrigerant high pressure, and the mapping relationship between the refrigerant pressure and the volumetric efficiency. The mapping relationship includes the volumetric efficiency of the compressor at different speeds, different refrigerant low pressures, different refrigerant high pressures, and different refrigerant pressure ratios. The refrigerant pressure ratio is the ratio of the refrigerant high pressure to the refrigerant low pressure.

[0069] In this step, the compressor's volumetric efficiency is determined based on the compressor's rotational speed, low refrigerant pressure, high refrigerant pressure, and the mapping relationship between refrigerant pressure and volumetric efficiency. This mapping relationship includes the volumetric efficiency of the compressor at different rotational speeds, different low refrigerant pressures, different high refrigerant pressures, and different refrigerant pressure ratios. The refrigerant pressure ratio is the ratio of the high refrigerant pressure to the low refrigerant pressure. For example, the mapping relationship between compressor rotational speed, low refrigerant pressure, high refrigerant pressure, and volumetric efficiency can be found in Table 1.

[0070] Table 1:

[0071] Figure 6 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 6 As shown, determining the allowable discharge superheat of the compressor based on the refrigerant flow rate of the compressor may include the following steps: In step S2021, the allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor.

[0072] In this step, the allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor. For example, the application mode scenario can be identified first, including any one of the following: cooling mode scenario, dehumidification mode scenario, heating mode scenario, and three heat source mode scenario; then, the allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor corresponding to the application mode scenario.

[0073] Figure 7 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 7 As shown, determining the allowable discharge superheat of the compressor based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor may include the following steps: In step S20211, an application mode scenario is identified, which includes any one of the following: cooling mode scenario, dehumidification mode scenario, heating mode scenario, and three heat source mode scenario.

[0074] In this step, the application mode scenario is identified. The application mode scenario can include any one of the following: cooling mode scenario, dehumidification mode scenario, heating mode scenario, and three heat source mode scenario.

[0075] In step S20212, the allowable exhaust superheat of the compressor is determined according to the mapping relationship between the refrigerant flow rate of the compressor and the allowable exhaust superheat of the compressor corresponding to the application mode scenario.

[0076] In this step, the allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor corresponding to the application mode scenario. For example, the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor in the cooling mode scenario can be found in Table 2.

[0077] Table 2:

[0078] The mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor in the dehumidification mode can be found in Table 3.

[0079] Table 3:

[0080] The mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor in the heating mode scenario can be found in Table 4.

[0081] Table 4:

[0082] The mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor in the three-heat-source mode scenario can be found in Table 5.

[0083] Table 5:

[0084] Figure 8 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 8As shown, determining the state of the compressor based on the actual exhaust superheat and the allowable exhaust superheat may include the following steps: In step S301, the superheat difference between the actual exhaust superheat and the allowable exhaust superheat is obtained.

[0085] In this step, the difference in superheat between the actual exhaust superheat and the allowable exhaust superheat is obtained, ΔT.

[0086] In step S302, the state of the compressor is determined based on the superheat difference.

[0087] In this step, the compressor's status is determined based on the superheat difference. For example, the cumulative time during which the superheat difference ΔT is greater than zero can be obtained first, and then, if the cumulative time exceeds a risk threshold, the compressor's status is determined to be oil shortage.

[0088] Figure 9 This is a flowchart illustrating a compressor protection method according to an exemplary embodiment. Figure 9 As shown, determining the state of the compressor based on the superheat difference may include the following steps: In step S3021, the cumulative time during which the superheat difference is greater than zero is obtained.

[0089] In this step, the cumulative time t during which the superheat difference ΔT is greater than zero is obtained.

[0090] In step S3022, if the cumulative time is greater than the risk threshold, the compressor is determined to be in a state of oil shortage.

[0091] In this step, if the cumulative time t is greater than the risk threshold, the compressor is determined to be in an oil shortage state. For example, this risk threshold may differ in different application scenarios. Specifically, the risk threshold in the heating mode is lower than that in the three-heat-source mode, which is lower than that in the dehumidification mode, which is lower than that in the cooling mode.

[0092] In summary, this disclosure provides a compressor protection method, including: obtaining the actual discharge superheat and allowable discharge superheat of the compressor; and performing overheat protection on the compressor based on the actual discharge superheat and allowable discharge superheat. This disclosure allows for early detection of whether the compressor is about to enter an oil shortage state by using the actual discharge superheat and allowable discharge superheat. Timely overheat protection when an oil shortage is detected can prevent excessive wear on the compressor, protect the compressor in advance, ensure the compressor is always in good operating condition, effectively reduce durability damage caused by oil shortage, improve user experience, and reduce after-sales costs.

[0093] Figure 10 This is a block diagram illustrating a compressor protection device according to an exemplary embodiment. Figure 10 As shown, this embodiment of the present disclosure provides a compressor protection device 1000, which may include the following modules: The first acquisition module 1010 is configured to acquire the actual exhaust superheat of the compressor.

[0094] The second acquisition module 1020 is configured to acquire the actual exhaust superheat of the compressor. The determination module 1030 is configured to determine the state of the compressor based on the actual exhaust superheat and the allowable exhaust superheat. The protection module 1040 is configured to perform overheat protection operation on the compressor when it is determined that the compressor is in a state of oil shortage.

[0095] In one possible implementation, the first acquisition module 1010 is further configured to: Obtain the exhaust temperature of the compressor; Obtain the discharge pressure saturation temperature of the compressor; The actual exhaust superheat of the compressor is obtained based on the exhaust temperature and the exhaust pressure saturation temperature.

[0096] In one possible implementation, the second acquisition module 1020 is further configured to: Obtain the refrigerant flow rate of the compressor; The allowable discharge superheat of the compressor is determined based on the refrigerant flow rate of the compressor.

[0097] In one possible implementation, the second acquisition module 1020 is further configured to: Obtain the refrigerant density of the compressor; Obtain the displacement of the compressor; Obtain the rotational speed of the compressor; Obtain the volumetric efficiency of the compressor; The refrigerant flow rate of the compressor is obtained based on the refrigerant density, the compressor displacement, the compressor speed, and the volumetric efficiency.

[0098] In one possible implementation, the second acquisition module 1020 is further configured to: The volumetric efficiency of the compressor is determined based on the compressor's rotational speed, refrigerant low pressure, refrigerant high pressure, and the mapping relationship between the refrigerant pressure and the volumetric efficiency. The mapping relationship includes the volumetric efficiency of the compressor at different rotational speeds, different refrigerant low pressures, different refrigerant high pressures, and different refrigerant pressure ratios. The refrigerant pressure ratio is the ratio of the refrigerant high pressure to the refrigerant low pressure.

[0099] In one possible implementation, the second acquisition module 1020 is further configured to: The allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor.

[0100] In one possible implementation, the second acquisition module 1020 is further configured to: Identify application mode scenarios, which include any one of the following: cooling mode scenario, dehumidification mode scenario, heating mode scenario, and three heat source mode scenario; Based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor corresponding to the application mode scenario, the allowable discharge superheat of the compressor is determined.

[0101] In one possible implementation, the determining module 1030 is further configured to: Obtain the superheat difference between the actual exhaust superheat and the allowable exhaust superheat; The state of the compressor is determined based on the superheat difference.

[0102] In one possible implementation, the determining module 1030 is further configured to: Obtain the cumulative time during which the superheat difference is greater than zero; If the cumulative time exceeds the risk threshold, the compressor is determined to be in a state of oil shortage.

[0103] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0104] In summary, this disclosure provides a compressor protection device, comprising: a first acquisition module configured to acquire the actual discharge superheat of the compressor; a second acquisition module configured to acquire the allowable discharge superheat of the compressor; a determination module configured to determine the state of the compressor based on the actual discharge superheat and the allowable discharge superheat; and a protection module configured to perform overheat protection on the compressor when the state of the compressor is determined to be oil-deficient. This disclosure can determine in advance whether the compressor is about to be in an oil-deficient state by using the actual discharge superheat and allowable discharge superheat. When it is determined that the compressor is about to be in an oil-deficient state, timely overheat protection can prevent excessive wear of the compressor, protect the compressor in advance, ensure that the compressor is always in good operating condition, effectively reduce durability damage to the compressor caused by oil deficiency, improve user experience, and reduce after-sales costs.

[0105] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the compressor protection method provided in this disclosure.

[0106] Figure 11 This is a block diagram illustrating an electronic device according to an exemplary embodiment. For example, the electronic device 1100 may be a vehicle thermal manager or a vehicle controller.

[0107] Reference Figure 11 The electronic device 1100 may include one or more of the following components: processing component 1102, memory 1104, power supply component 1106, multimedia component 1108, audio component 1110, input / output interface 1112, sensor component 1114, and communication component 1116.

[0108] Processing component 1102 typically controls the overall operation of electronic device 1100, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 1102 may include one or more processors 1120 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 1102 may include one or more modules to facilitate interaction between processing component 1102 and other components. For example, processing component 1102 may include a multimedia module to facilitate interaction between multimedia component 1108 and processing component 1102.

[0109] Memory 1104 is configured to store various types of data to support the operation of electronic device 1100. Examples of such data include instructions for any application or method operating on electronic device 1100, contact data, phonebook data, messages, pictures, videos, etc. Memory 1104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0110] Power supply component 1106 provides power to various components of electronic device 1100. Power supply component 1106 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 1100.

[0111] Multimedia component 1108 includes a screen that provides an output interface between the electronic device 1100 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 1108 includes a front-facing camera and / or a rear-facing camera. When the electronic device 1100 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0112] Audio component 1110 is configured to output and / or input audio signals. For example, audio component 1110 includes a microphone (MIC) configured to receive external audio signals when electronic device 1100 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1104 or transmitted via communication component 1116. In some embodiments, audio component 1110 also includes a speaker for outputting audio signals.

[0113] Input / output interface 1112 provides an interface between processing component 1102 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, start buttons, and lock buttons.

[0114] Sensor assembly 1114 includes one or more sensors for providing state assessments of various aspects of electronic device 1100. For example, sensor assembly 1114 may detect the on / off state of electronic device 1100, the relative positioning of components such as the display and keypad of electronic device 1100, changes in position of electronic device 1100 or a component of electronic device 1100, the presence or absence of user contact with electronic device 1100, the orientation or acceleration / deceleration of electronic device 1100, and temperature changes of electronic device 1100. Sensor assembly 1114 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1114 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 1114 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0115] Communication component 1116 is configured to facilitate wired or wireless communication between electronic device 1100 and other devices. Electronic device 1100 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 1116 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1116 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0116] In an exemplary embodiment, the electronic device 1100 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0117] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 1104 including instructions, which can be executed by a processor 1120 of an electronic device 1100 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0118] The aforementioned device can be a standalone electronic device or a part of a standalone electronic device. For example, in one embodiment, the electronic device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be a single IC or a collection of multiple ICs; the chip can include, but is not limited to, the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip), etc. The aforementioned integrated circuit or chip can be used to execute executable instructions (or code) to implement the compressor protection method described above. The executable instructions can be stored in the integrated circuit or chip or obtained from other devices or equipment. For example, the integrated circuit or chip includes a processor, memory, and an interface for communicating with other devices. The executable instruction can be stored in the memory, and when the executable instruction is executed by the processor, it implements the compressor protection method described above; or, the integrated circuit or chip can receive the executable instruction through the interface and transmit it to the processor for execution to implement the compressor protection method described above.

[0119] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the compressor protection method described above when executed by the programmable device.

[0120] Figure 12 This is a block diagram illustrating a vehicle according to an exemplary embodiment. (Refer to...) Figure 12The vehicle 1200 may include electronic devices 1100 and a compressor (not shown), as well as various subsystems, such as an infotainment system 1210, a perception system 1220, a decision control system 1230, a drive system 1240, and a computing platform 1250. The vehicle 1200 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and component of the vehicle 1200 can be interconnected via wired or wireless means.

[0121] In some embodiments, the infotainment system 1210 may include a communication system, an entertainment system, and a navigation system, etc.

[0122] The perception system 1220 may include several types of sensors for sensing information about the environment surrounding the vehicle 1200. For example, the perception system 1220 may include a global positioning system (which may be a GPS system, a BeiDou system, or another positioning system), an inertial measurement unit (IMU), a lidar, a millimeter-wave radar, an ultrasonic radar, and a camera device.

[0123] The decision control system 1230 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0124] The drive system 1240 may include components that provide powered motion to the vehicle 1200. In one embodiment, the drive system 1240 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0125] Some or all of the functions of the vehicle 1200 are controlled by a computing platform 1250. The computing platform 1250 may include at least one processor 1251 and a memory 1252, the processor 1251 being able to execute instructions 1253 stored in the memory 1252.

[0126] Processor 1251 can be any conventional processor, such as a commercially available CPU. Processors may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems-on-chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0127] The memory 1252 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0128] In addition to instruction 1253, memory 1252 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 1252 can be used by computing platform 1250.

[0129] In this embodiment of the disclosure, the processor 1251 may execute instruction 1253 to complete all or part of the steps of the compressor protection method described above.

[0130] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the compressor protection method described above when executed by the programmable device.

[0131] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0132] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A compressor protection method, characterized in that, include: Obtain the actual discharge superheat of the compressor; Obtain the refrigerant flow rate of the compressor; The allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor. The state of the compressor is determined based on the actual exhaust superheat and the allowable exhaust superheat. If the compressor is determined to be in a state of oil shortage, an overheat protection operation is performed on the compressor.

2. The method according to claim 1, characterized in that, The process of obtaining the actual exhaust superheat of the compressor includes: Obtain the exhaust temperature of the compressor; Obtain the discharge pressure saturation temperature of the compressor; The actual exhaust superheat of the compressor is obtained based on the exhaust temperature and the exhaust pressure saturation temperature.

3. The method according to claim 1, characterized in that, The step of obtaining the refrigerant flow rate of the compressor includes: Obtain the refrigerant density of the compressor; Obtain the displacement of the compressor; Obtain the rotational speed of the compressor; Obtain the volumetric efficiency of the compressor; The refrigerant flow rate of the compressor is obtained based on the refrigerant density, the compressor displacement, the compressor speed, and the volumetric efficiency.

4. The method according to claim 3, characterized in that, The step of obtaining the volumetric efficiency of the compressor includes: The volumetric efficiency of the compressor is determined based on the compressor's rotational speed, refrigerant low pressure, refrigerant high pressure, and the mapping relationship between the refrigerant pressure and the volumetric efficiency. The mapping relationship includes the volumetric efficiency of the compressor at different rotational speeds, different refrigerant low pressures, different refrigerant high pressures, and different refrigerant pressure ratios. The refrigerant pressure ratio is the ratio of the refrigerant high pressure to the refrigerant low pressure.

5. The method according to claim 1, characterized in that, The step of determining the allowable discharge superheat of the compressor based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor includes: Identify application mode scenarios, which include any one of the following: cooling mode scenario, dehumidification mode scenario, heating mode scenario, and three heat source mode scenario; Based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor corresponding to the application mode scenario, the allowable discharge superheat of the compressor is determined.

6. The method according to claim 1, characterized in that, Determining the compressor's state based on the actual exhaust superheat and the allowable exhaust superheat includes: Obtain the superheat difference between the actual exhaust superheat and the allowable exhaust superheat; The state of the compressor is determined based on the superheat difference.

7. The method according to claim 6, characterized in that, Determining the state of the compressor based on the superheat difference includes: Obtain the cumulative time during which the superheat difference is greater than zero; If the cumulative time exceeds the risk threshold, the compressor is determined to be in a state of oil shortage.

8. The method according to any one of claims 1-7, characterized in that, The thermal protection operation includes oil return or shutdown.

9. A compressor protection device, characterized in that, include: The first acquisition module is configured to acquire the actual exhaust superheat of the compressor; The second acquisition module is configured to acquire the refrigerant flow rate of the compressor; The allowable discharge superheat of the compressor is determined based on the mapping relationship between the refrigerant flow rate of the compressor and the allowable discharge superheat of the compressor. The determination module is configured to determine the state of the compressor based on the actual exhaust superheat and the allowable exhaust superheat; The protection module is configured to perform overheat protection operation on the compressor when it is determined that the compressor is in a state of oil shortage.

10. An electronic device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to execute the executable instructions to implement the method of any one of claims 1 to 8.

11. A vehicle, characterized in that, include: The electronic device and compressor as claimed in claim 10.

12. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the program instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 8.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 8.

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