Air conditioner compressor oil temperature control system and method

Abstract

The invention relates to the technical field of air conditioners, and provides an air conditioner compressor oil temperature control system and method.The air conditioner compressor oil temperature control system comprises a temperature sensor, an electric heating piece, a main control loop and an auxiliary control loop, and the temperature sensor is arranged in an air conditioner compressor; the electric heating piece is arranged on the compressor; the main control loop comprises a main power supply and a main control board, the main power supply is connected with the main control board, and the main control board is respectively connected with the temperature sensor and the electric heating piece; the auxiliary control loop comprises a standby power supply and a standby control board, the standby power supply is connected with the main power supply and the standby control board, and the standby control board is connected with the main control board, the temperature sensor and the electric heating piece. According to the invention, uninterrupted temperature measurement and heating of the compressor oil can be realized, and the compressor oil is effectively prevented from freezing, so that an air conditioning unit can be smoothly started in cold weather.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an oil temperature control system and method for an air conditioner compressor. Background Art

[0002] In the related art, in cold weather, when the air conditioner is powered on and on standby or powered off and shut down, the compressor oil in the outdoor unit of the air conditioner is extremely likely to freeze. Due to the high viscosity of the oil and the dissolution phenomenon of the refrigerant and the oil, etc., the starting load of the compressor is increased, and it is difficult for the compressor to start. Summary of the Invention

[0003] The present invention provides an oil temperature control system and method for an air conditioner compressor, which are used to solve the defect that the compressor oil freezes and causes difficult starting of the compressor in the related art. Through a dual-drive power supply, it is possible to continuously measure the temperature and heat the compressor oil when the air conditioner is powered on and on standby and powered off and shut down, effectively preventing the compressor oil from freezing, so as to ensure that the air conditioner unit can start smoothly in cold weather.

[0004] The present invention provides an oil temperature control system for an air conditioner compressor, including:

[0005] A temperature sensor, arranged inside the air conditioner compressor;

[0006] An electric heating element, arranged on the compressor;

[0007] A main control circuit, including: a main power supply and a main control board, the main power supply is connected to the main control board, and the main control board is respectively connected to the temperature sensor and the electric heating element;

[0008] An auxiliary control circuit, including: a standby power supply and a standby control board, the standby power supply is respectively connected to the main power supply and the standby control board, and the standby control board is respectively connected to the main control board, the temperature sensor and the electric heating element.

[0009] The oil temperature control system for an air conditioner compressor provided by the present invention can detect the temperature of the compressor oil in real time through a temperature sensor; an electric heating element can heat the oil when necessary to prevent it from freezing; the main power supply of the main control circuit provides the main power for the system and can supply power to the backup power supply of the auxiliary control circuit. The main control board is responsible for processing the data of the temperature sensor and controlling the opening and closing of the electric heating element; the backup power supply of the auxiliary control circuit provides emergency power when the main power supply is cut off, and the backup control board takes over the control of temperature detection and the electric heating element when the main power supply is cut off. Therefore, through the design of the dual-drive power control circuit, the present invention ensures that real-time and effective temperature detection and heating of the compressor oil can be carried out under various power supply conditions (including power-on standby and power-off shutdown), controls the temperature of the compressor oil, prevents the oil from freezing, reduces the starting load of the compressor, and reduces the problem of difficult starting. Especially in cold weather, it ensures that the air conditioner unit can start smoothly.

[0010] An oil temperature control system for an air conditioner compressor provided by the present invention, the main control circuit further includes:

[0011] A main relay, the main control board is connected to the electric heating element through the main relay.

[0012] The present invention sets a main relay in the main control circuit to control the on-off of the electric heating element. By controlling the on-off action of the main relay through the main control board, the opening and closing state of the electric heating element can be adjusted more precisely. At the same time, the main relay can also play a role in overload protection. When the current of the electric heating element is too large, the main relay can automatically disconnect to protect the circuit and equipment from damage, thereby improving the safety and reliability of the entire system.

[0013] An oil temperature control system for an air conditioner compressor provided by the present invention, the auxiliary control circuit further includes:

[0014] A backup relay, the backup control board is connected to the electric heating element through the backup relay;

[0015] In the case of the main power supply, when the oil temperature in the compressor is less than the target preset value, the backup relay is disconnected and the main relay is turned on;

[0016] In the case of the backup power supply, when the oil temperature in the compressor is less than the target preset value, the main relay is disconnected and the backup relay is turned on.

[0017] In the present invention, a standby relay is provided in the auxiliary control loop to control the on-off of the electric heating element. When switching between the main power supply and the standby power supply, through the interlocking cooperation of the main relay and the standby relay (only one is turned on), the power supply safety of the electric heating element can be improved, the power supply conflict during power supply switching can be avoided, and the power supply of the electric heating element is ensured not to be interrupted, realizing continuous control of the compressor oil temperature and preventing the oil from freezing. Through the switching control of the main relay and the standby relay, redundant design between the main control loop and the auxiliary control loop is achieved, improving the stability and reliability of the system. Even if one of the relays or control loops fails, the other relay or control loop can take over the work to ensure the normal operation of the electric heating element.

[0018] For an air-conditioning compressor oil temperature control system provided by the present invention, the main power supply is the commercial power, and the standby power supply is the storage battery.

[0019] The present invention also provides a control method for the above-mentioned air-conditioning compressor oil temperature control system, including:

[0020] The standby control board obtains the power supply state of the main power supply through the main control board;

[0021] In the case of the main power supply being powered off, control the standby power supply to supply power to the electric heating element;

[0022] Detect the oil temperature of the oil in the compressor;

[0023] According to the oil temperature of the oil in the compressor, control the opening and closing of the electric heating element.

[0024] For the control method of the air-conditioning compressor oil temperature control system provided by the present invention, the standby control board obtains the power supply state information of the main power supply in real time through the main control board. When it is detected that the main power supply is powered off, the standby control board starts the standby power supply to supply power to the electric heating element, ensuring that the electric heating element can continue to work when the main power supply is powered off and preventing the compressor oil from freezing. Through the temperature sensor installed inside the compressor, the oil temperature of the oil in the compressor is continuously detected, and according to the detected oil temperature of the oil in the compressor, the standby control board controls the opening and closing of the electric heating element. Therefore, the method of the present invention realizes precise control of the air-conditioning compressor oil temperature through real-time monitoring of the main power supply state, standby power supply switching, oil temperature detection, and opening and closing control of the electric heating element, effectively preventing the compressor oil from freezing and ensuring the stable operation and smooth start of the air-conditioning unit in cold weather.

[0025] For a control method of an air-conditioning compressor oil temperature control system provided by the present invention, the step of controlling the opening and closing of the electric heating element according to the oil temperature of the oil in the compressor includes:

[0026] Determine that the oil temperature in the compressor is less than the target preset value, and control the electric heating element to turn on;

[0027] Determine that the oil temperature in the compressor is greater than or equal to the target preset value, and control the electric heating element to turn off.

[0028] By monitoring and comparing the oil temperature in the compressor in real time, the present invention accurately controls the opening and closing of the electric heating element, realizes the effective management of the oil temperature, prevents the oil from freezing, ensures the stable operation and smooth start of the air-conditioning unit in cold weather, and takes into account the requirements of energy conservation and equipment protection at the same time.

[0029] According to a control method of an oil temperature control system for an air-conditioning compressor provided by the present invention, the step of determining that the oil temperature in the compressor is less than the target preset value and controlling the electric heating element to turn on includes:

[0030] Determine that the oil temperature in the compressor is less than the target preset value, control the main relay between the main control board and the electric heating element to disconnect, and the standby relay between the standby control board and the electric heating element to conduct, so as to turn on the electric heating element.

[0031] According to a control method of an oil temperature control system for an air-conditioning compressor provided by the present invention, it further includes:

[0032] In the case of the main power supply, control the main power supply to supply power to the electric heating element and charge the standby power supply;

[0033] Detect the oil temperature in the compressor;

[0034] According to the oil temperature in the compressor, control the opening and closing of the electric heating element.

[0035] The control method of the present invention can make full use of electric power resources when the main power supply is on, provide stable power for the electric heating element powered by the main power supply, and charge the standby power supply at the same time to make emergency preparations. At the same time, it can also accurately control the opening and closing of the electric heating element according to the oil temperature in the compressor, prevent the oil from freezing, and ensure the stable operation and smooth start of the air-conditioning unit in cold weather. This design takes into account the energy utilization efficiency under normal operating conditions and the power supply guarantee in case of emergency, and improves the overall performance and reliability of the system.

[0036] According to a control method of an oil temperature control system for an air-conditioning compressor provided by the present invention, the step of controlling the opening and closing of the electric heating element according to the oil temperature in the compressor includes:

[0037] Determine that the oil temperature in the compressor is less than the target preset value, and control the electric heating element to turn on;

[0038] Determine that the oil temperature in the compressor is greater than or equal to the target preset value, and control the electric heating element to turn off.

[0039] According to a control method of an air-conditioning compressor oil temperature control system provided by the present invention, the step of determining that the oil temperature in the compressor is less than the target preset value and controlling the electric heating element to turn on includes:

[0040] Determine that the oil temperature in the compressor is less than the target preset value, control the standby relay located between the standby control board and the electric heating element to disconnect, and the main relay located between the main control board and the electric heating element to conduct, so as to turn on the electric heating element. Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following will briefly introduce the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a schematic structural diagram of an air-conditioning compressor oil temperature control system provided by the present invention;

[0043] Figure 2 It is one of the schematic flowcharts of the control method of the air-conditioning compressor oil temperature control system provided by the present invention;

[0044] Figure 3 It is another schematic flowchart of the control method of the air-conditioning compressor oil temperature control system provided by the present invention;

[0045] Figure 4 It is the third schematic flowchart of the control method of the air-conditioning compressor oil temperature control system provided by the present invention.

[0046] Reference Signs:

[0047] 101: Temperature sensor; 102: Electric heating element;

[0048] 103: Main control circuit; 1031: Main power supply;

[0049] 1032: Main control board; 1033: Main relay;

[0050] 104: Auxiliary control circuit; 1041: Standby power supply;

[0051] 1042: Standby control board; 1043: Standby relay. Detailed Embodiments

[0052] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0053] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0054] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0055] The following Figures 1-4 describes the air-conditioning compressor oil temperature control system and method of the present invention.

[0056] According to an embodiment of the first aspect of the present invention, as shown in Figure 1 the air-conditioning compressor oil temperature control system provided by the present invention mainly includes: a temperature sensor 101, an electric heating element 102, a main control circuit 103, an auxiliary control circuit 104, etc. Among them, the temperature sensor 101 is arranged inside the air-conditioning compressor; the electric heating element 102 is arranged on the compressor; the main control circuit 103 includes: a main power supply 1031 and a main control board 1032, the main power supply 1031 is connected to the main control board 1032, and the main control board 1032 is respectively connected to the temperature sensor 101 and the electric heating element 102; the auxiliary control circuit 104 includes: a standby power supply 1041 and a standby control board 1042, the standby power supply 1041 is respectively connected to the main power supply 1031 and the standby control board 1042, and the standby control board 1042 is respectively connected to the main control board 1032, the temperature sensor 101, and the electric heating element 102.

[0057] Specifically, the temperature of the compressor oil can be detected in real time by the temperature sensor 101; the oil can be heated by the electric heating element 102 when necessary to prevent it from freezing; the main power supply 1031 of the main control circuit 103 can provide the main power for the system and can supply power to the backup power supply 1041 of the auxiliary control circuit 104. The main control board 1032 is responsible for processing the data of the temperature sensor 101 and controlling the opening and closing of the electric heating element 102; the backup power supply 1041 of the auxiliary control circuit 104 can provide emergency power when the main power supply 1031 is powered off, and the backup control board 1042 can take over the temperature detection and the control of the electric heating element 102 when the main power supply 1031 is powered off.

[0058] In the normal power supply state (the air conditioner is powered on and standby), the main control circuit 103 processes the data of the temperature sensor 101 through the main power supply 1031 and the main control board 1032, and controls the electric heating element 102 to heat the compressor oil as needed to prevent the oil from freezing.

[0059] When the main power supply 1031 is powered off (the air conditioner is powered off and stops operating), the auxiliary control circuit 104 starts the backup power supply 1041 to supply power to the system, and the backup control board 1042 takes over the temperature monitoring and the control of the electric heating element 102 to ensure that the temperature of the compressor oil can be continuously measured and heated in the power-off state.

[0060] The air conditioner compressor oil temperature control system provided by the embodiment of the present invention, through the design of the dual-drive power supply control circuit, ensures that the air conditioner can perform real-time and effective temperature detection and heating on the compressor oil under various power supply conditions (including powered on and standby and powered off and stopped operating), controls the temperature of the compressor oil, prevents the oil from freezing, reduces the starting load of the compressor, and reduces the problem of difficult starting. Especially in cold weather, it ensures that the air conditioner unit can start smoothly.

[0061] Therefore, through the innovative dual-drive power supply and redundant control circuit design of the present invention, the problem of difficult starting of the air conditioner caused by the freezing of the compressor oil in the related technology is effectively solved, and the stability and reliability of the air conditioner system are improved. Especially for air conditioner equipment operating in cold environments, it has important practical value.

[0062] According to an embodiment of the present invention, with reference to Figure 1 As shown, the main control circuit 103 further includes: a main relay 1033, and the main control board 1032 is connected to the electric heating element 102 through the main relay 1033.

[0063] Specifically, by setting the main relay 1033 in the main control circuit 103 to control the on / off of the electric heating element 102, and controlling the on / off action of the main relay 1033 through the main control board 1032, the on / off state of the electric heating element 102 can be adjusted more precisely. At the same time, the main relay 1033 can also play a role in overload protection. When the current of the electric heating element 102 is too large, the main relay 1033 can automatically disconnect to protect the circuit and equipment from damage.

[0064] By arranging the main relay 1033 between the main control board 1032 and the electric heating element 102, electrical isolation is provided, which helps to improve the safety of the system. If the electric heating element 102 fails or is short-circuited, the main relay 1033 can cut off the power supply to prevent the fault from spreading to the main control board 1032 or other components.

[0065] Therefore, incorporating the main relay 1033 into the design of the main control circuit 103 in the present invention can enhance the control precision and safety reliability of the electric heating element 102, provide better overload protection, and improve the reliability and durability of the entire system.

[0066] According to an embodiment of the present invention, the main power supply 1031 and the main control board 1032 in the main control circuit 103 are the power supply (mains electricity) and the control board of the air conditioner itself. With such a design, the existing structure of the air conditioner can be fully utilized to integrate the system of the present invention onto the air conditioner, thereby simplifying the system structure and reducing the manufacturing cost.

[0067] According to an embodiment of the present invention, referring to Figure 1 As shown, the auxiliary control circuit 104 further includes: a standby relay 1043, and the standby control board 1042 is connected to the electric heating element 102 through the standby relay 1043;

[0068] In the case of being powered by the main power supply 1031, when the oil temperature in the compressor is less than the target preset value, the standby relay 1043 disconnects and the main relay 1033 conducts, and the electric heating element 102 is controlled by the main control circuit 103 to heat the oil;

[0069] In the case of being powered by the standby power supply 1041, when the oil temperature in the compressor is less than the target preset value, the main relay 1033 disconnects and the standby relay 1043 conducts, and the electric heating element 102 is controlled by the auxiliary control circuit 104 to heat the oil.

[0070] Specifically, the technical effects of the standby relay 1043 in the present invention are similar to those of the main relay 1033, for details, please refer to the above.

[0071] Moreover, when switching between the main power supply 1031 and the backup power supply 1041, through the interlocking cooperation of the main relay 1033 and the backup relay 1043 (only one is turned on), the power supply safety of the electric heating element 102 can be improved, the power supply conflict during power supply switching is avoided, and the power supply of the electric heating element 102 is ensured not to be interrupted, realizing continuous control of the compressor oil temperature and preventing the oil from freezing. When the main power supply 1031 is powered normally, the system preferentially uses the main control circuit 103 for control, and the auxiliary control circuit 104 is in the standby state, saving energy and extending the service life of the backup power supply 1041. Only when the main power supply 1031 fails or loses power, the auxiliary control circuit 104 will start to ensure the continuous operation of the system.

[0072] In addition, through the switching control of the main relay 1033 and the backup relay 1043, the redundant design between the main control circuit 103 and the auxiliary control circuit 104 is realized, improving the stability and reliability of the system. Even if one of the relays or control circuits fails, the other relay or control circuit can take over the work to ensure the normal operation of the electric heating element 102.

[0073] In summary, through the design of the dual control circuit in the embodiment of the present invention, seamless switching between the main power supply 1031 and the backup power supply 1041 can be achieved, resource utilization can be optimized, the stability and reliability of the system can be improved, the compressor oil can be effectively prevented from freezing, and the smooth startup of the air conditioner unit in cold weather can be ensured.

[0074] According to an embodiment of the present invention, the main power supply 1031 is the commercial power, and the backup power supply 1041 is the storage battery.

[0075] Specifically, the commercial power is the main power source of the system. The commercial power usually has stable and continuous power supply characteristics and can meet the power demand of the air conditioner compressor oil temperature control system during normal operation.

[0076] The storage battery is an energy storage device that can provide emergency power when the main power supply 1031 fails or loses power. The storage battery can be charged when the main power supply 1031 is powered normally to reserve energy for powering the system when needed.

[0077] By using the commercial power as the main power supply 1031 and the storage battery as the backup power supply 1041, the system has dual power supply guarantees. Even if the commercial power fails or loses power, the storage battery can immediately take over the power supply task to ensure the continuous operation of the air conditioner compressor oil temperature control system and prevent the compressor oil from freezing.

[0078] When the mains power supply is normal, the system preferentially uses the mains power, reducing the dependence on and wear of the battery, and extending the service life of the battery. At the same time, as a recyclable energy storage device, the battery is relatively environmentally friendly and has a high energy utilization rate.

[0079] As a backup power supply 1041, the battery is not affected by the mains power supply and can provide stable power support in various environments (such as power outages, unstable power grids, etc.), enhancing the environmental adaptability and operation stability of the system.

[0080] In summary, choosing the mains power as the main power supply 1031 and the battery as the backup power supply 1041 can improve the power supply reliability and environmental adaptability of the air-conditioning compressor oil temperature control system, ensure that the compressor oil does not freeze in cold weather, and thus ensure the smooth startup and operation of the air-conditioning unit.

[0081] The specific type of the electric heating element 102 of the present invention is not particularly limited. For example, it can be an electric heating tape, and the electric heating tape is arranged at the bottom of the compressor.

[0082] Next, the control method of the air-conditioning compressor oil temperature control system provided by the present invention will be described. The control method described below can be mutually corresponding and referred to the control system described above.

[0083] According to an embodiment of the second aspect of the present invention, referring to Figure 2 As shown, the present invention also provides a control method for the air-conditioning compressor oil temperature control system of the above embodiment, mainly including the following steps:

[0084] S201. The standby control board 1042 obtains the power supply state of the main power supply 1031 through the main control board 1032;

[0085] S202. In the case of a power outage of the main power supply 1031, control the standby power supply 1041 to supply power to the electric heating element 102;

[0086] S203. Detect the oil temperature of the oil in the compressor;

[0087] S204. Control the opening and closing of the electric heating element 102 according to the oil temperature of the oil in the compressor.

[0088] Specifically, through the connection with the main control board 1032, the standby control board 1042 obtains the power supply status information of the main power supply 1031 in real time. When it detects that the main power supply 1031 is powered off (the air conditioner is powered off and stops running), the standby control board 1042 activates the standby power supply 1041 to supply power to the electric heating element 102, ensuring that the electric heating element 102 can continue to operate when the main power supply 1031 is powered off and preventing the compressor oil from freezing. And through the temperature sensor 101 installed inside the compressor, it continuously detects the oil temperature of the oil in the compressor. According to the detected oil temperature of the oil in the compressor, the standby control board 1042 controls the opening and closing of the electric heating element 102 to achieve the control of the oil temperature.

[0089] The control method of the present invention can monitor the power supply status of the main power supply 1031 and the oil temperature of the oil in the compressor in real time, and quickly make a response based on this information to ensure that the electric heating element 102 can be turned on or off in time when needed. Through the switching control of the standby power supply 1041, the standby power supply 1041 can be immediately activated when the main power supply 1031 is powered off, ensuring the continuous power supply of the electric heating element 102 and preventing the compressor oil from freezing.

[0090] Therefore, the control method of the air conditioner compressor oil temperature control system provided by the embodiment of the present invention realizes the precise control of the air conditioner compressor oil temperature through real-time monitoring of the main power supply status, standby power supply switching, oil temperature detection, and opening and closing control of the electric heating element, effectively preventing the compressor oil from freezing and ensuring the stable operation and smooth start of the air conditioner unit in cold weather.

[0091] According to an embodiment of the present invention, the step of controlling the opening and closing of the electric heating element 102 according to the oil temperature of the oil in the compressor includes:

[0092] Determine that the oil temperature of the oil in the compressor is less than the target preset value, and control the electric heating element 102 to turn on;

[0093] Determine that the oil temperature of the oil in the compressor is greater than or equal to the target preset value, and control the electric heating element 102 to turn off.

[0094] Specifically, by continuously monitoring the oil temperature of the oil in the compressor and comparing it with the target preset value:

[0095] When it is detected that the oil temperature of the oil in the compressor is less than the target preset value, it is judged that there may be a risk of oil freezing. To prevent the oil from freezing, at this time, the electric heating element 102 is controlled to turn on to heat the oil;

[0096] When it is detected that the oil temperature of the oil in the compressor is greater than or equal to the target preset value, it is judged that the oil has reached or exceeded the appropriate working temperature and further heating is not required. To save energy and prevent overheating, at this time, the electric heating element 102 is controlled to turn off.

[0097] In the embodiment of the present invention, by monitoring and comparing the oil temperature in the compressor in real time, the opening and closing of the electric heating element 102 are precisely controlled to ensure that the oil always remains within an appropriate operating temperature range, avoiding the problems of oil freezing or overheating, achieving effective management of the oil temperature, preventing the oil from freezing, ensuring the stable operation and smooth startup of the air-conditioning unit in cold weather, and taking into account the requirements of energy conservation and equipment protection at the same time.

[0098] According to an embodiment of the present invention, the step of determining that the oil temperature in the compressor is less than the target preset value and controlling the electric heating element 102 to turn on includes:

[0099] Determine that the oil temperature in the compressor is less than the target preset value, control the main relay 1033 located between the main control board 1032 and the electric heating element 102 to disconnect, and the standby relay 1043 located between the standby control board 1042 and the electric heating element 102 to conduct, so as to turn on the electric heating element 102.

[0100] Specifically, when the main power supply 1031 is powered off and the oil temperature is lower than the target preset value, the standby control board 1042 sends an instruction to cut off the main relay 1033 to the main control board 1032 to cut off the main relay 1033 and conduct the standby relay 1043, which can avoid the power supply conflict during power supply switching, improve the power supply safety of the electric heating element 102, control the electric heating element 102 to turn on through the standby relay 1043, heat the oil, and prevent the oil from freezing. This design ensures that even in the case of a failure or power-off of the main power supply 1031, the electric heating element 102 can be controlled through the auxiliary control circuit 104, ensuring the continuous operation and stable performance of the air-conditioning compressor oil temperature control system.

[0101] And, the step of determining that the oil temperature in the compressor is greater than or equal to the target preset value and controlling the electric heating element 102 to turn off includes:

[0102] Determine that the oil temperature in the compressor is greater than or equal to the target preset value, control the main relay 1033 of the main control circuit 103 to disconnect, and the standby relay 1043 of the auxiliary control circuit 104 to disconnect, so as to turn off the electric heating element 102.

[0103] According to an embodiment of the present invention, as shown in Figure 3 The control method of the air-conditioning compressor oil temperature control system of the present invention further includes the following steps:

[0104] S301. Under the condition of power supply from the main power supply 1031, control the main power supply 1031 to supply power to the electric heating element 102 and charge the standby power supply 1041;

[0105] S302. Detect the oil temperature in the compressor;

[0106] S303. Control the opening and closing of the electric heating element 102 according to the oil temperature of the oil in the compressor.

[0107] Specifically, in the case where the main power supply 1031 is powered (the air conditioner is powered on and standby), the main control board 1032 not only controls the main power supply 1031 to supply power to the electric heating element 102 to meet the operation requirements of the electric heating element 102, but also charges the standby power supply 1041 using the main power supply 1031. This can ensure that the standby power supply 1041 has sufficient power supply when needed to provide emergency support.

[0108] Then, the temperature sensor 101 continuously detects the oil temperature of the oil in the compressor, and based on the detected oil temperature of the oil in the compressor, the main control board 1032 controls the opening and closing of the electric heating element 102.

[0109] The control method of the present invention can make full use of power resources when the main power supply 1031 is powered, provide stable power for the electric heating element 102 powered by the main power supply 1031, and at the same time charge the standby power supply 1041 to the saturated state to make emergency preparations. At the same time, it can also accurately control the opening and closing of the electric heating element 102 according to the oil temperature of the oil in the compressor, prevent the oil from freezing, and ensure the stable operation and smooth start of the air conditioner unit in cold weather. This design takes into account the energy utilization efficiency in the normal operation state and the power supply guarantee in the emergency situation, improving the overall performance and reliability of the system.

[0110] According to an embodiment of the present invention, the step of controlling the opening and closing of the electric heating element 102 according to the oil temperature of the oil in the compressor includes:

[0111] Determine that the oil temperature of the oil in the compressor is less than the target preset value, and control the electric heating element 102 to turn on;

[0112] Determine that the oil temperature of the oil in the compressor is greater than or equal to the target preset value, and control the electric heating element 102 to turn off.

[0113] According to an embodiment of the present invention, the step of determining that the oil temperature of the oil in the compressor is less than the target preset value and controlling the electric heating element 102 to turn on includes:

[0114] Determine that the oil temperature of the oil in the compressor is less than the target preset value, control the standby relay 1043 located between the standby control board 1042 and the electric heating element 102 to disconnect, and the main relay 1033 located between the main control board 1032 and the electric heating element 102 to conduct, so as to turn on the electric heating element 102.

[0115] Specifically, when the main power supply 1031 is powered and the engine oil temperature is lower than the target preset value, the main control board 1032 sends an instruction to cut off the standby relay 1043 to the standby control board 1042, so as to cut off the standby relay 1043 and turn on the main relay 1033, which can avoid the power supply conflict during power switching, improve the power supply safety of the electric heating element, control the electric heating element 102 to turn on through the main relay 1033, heat the engine oil, and prevent the engine oil from freezing. This design ensures that when the main power supply 1031 is powered normally, the main power supply resources can be fully utilized, and the electric heating element 102 is controlled through the main control circuit 103, ensuring the continuous operation and stable performance of the air-conditioning compressor engine oil temperature control system.

[0116] Moreover, the step of determining that the engine oil temperature in the compressor is greater than or equal to the target preset value and controlling the electric heating element 102 to turn off includes:

[0117] Determine that the engine oil temperature in the compressor is greater than or equal to the target preset value, control the standby relay 1043 of the auxiliary control circuit 104 to disconnect, and the main relay 1033 of the main control circuit 103 to disconnect, so as to turn off the electric heating element 102.

[0118] Next, the control method of the air-conditioning compressor engine oil temperature control system provided by the present invention will be described in combination with specific examples. Refer to Figure 4 As shown, it mainly includes the following steps:

[0119] S401. The standby control board 1042 detects the power supply status of the main power supply 1031 through the main control board 1032;

[0120] S402. Determine whether the main power supply 1031 is powered, that is, whether the air conditioner is powered on. If so, execute step S403; if not, execute step S408;

[0121] S403. When the air conditioner is powered on, control the main power supply 1031 to supply power to the electric heating element 102 and charge the standby power supply 1041;

[0122] S404. Detect the engine oil temperature of the compressor through the temperature sensor 101;

[0123] S405. Determine whether the oil temperature is lower than the target preset value. If so, execute step S406; if not, execute step S407;

[0124] S406. Turn on the electric heating element 102;

[0125] S407. Turn off the electric heating element 102;

[0126] S408. When the air conditioner is powered off, control the standby power supply 1041 to supply power to the electric heating element 102, and jump to step S404.

[0127] Therefore, the control method of the embodiment of the present invention can ensure that real-time and effective temperature detection and heating of the compressor oil can be carried out when the air conditioner is powered on and in standby or powered off and shut down, control the temperature of the compressor oil, prevent the oil from freezing, reduce the starting load of the compressor, and thus ensure that the air conditioner unit can be started smoothly.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioner compressor oil temperature control system, characterized in that, Including: A temperature sensor, disposed inside the air-conditioning compressor; An electric heating element, disposed on the compressor; A main control circuit, including: a main power supply and a main control board, the main power supply is connected to the main control board, and the main control board is respectively connected to the temperature sensor and the electric heating element; An auxiliary control circuit, including: a backup power supply and a backup control board, the backup power supply is respectively connected to the main power supply and the backup control board, and the backup control board is respectively connected to the main control board, the temperature sensor and the electric heating element.

2. The air conditioner compressor oil temperature control system according to claim 1, characterized in that, The main control circuit further includes: A main relay, the main control board is connected to the electric heating element through the main relay.

3. The air conditioner compressor oil temperature control system according to claim 2, characterized in that, The auxiliary control circuit further includes: A backup relay, the backup control board is connected to the electric heating element through the backup relay; In the case of being powered by the main power supply, when the oil temperature inside the compressor is less than the target preset value, the backup relay is disconnected and the main relay is turned on; In the case of being powered by the backup power supply, when the oil temperature inside the compressor is less than the target preset value, the main relay is disconnected and the backup relay is turned on.

4. The air conditioner compressor oil temperature control system according to any one of claims 1-3, characterized in that, The main power supply is the commercial power, and the backup power supply is the storage battery.

5. A control method for the air conditioner compressor oil temperature control system according to any one of claims 1-4, characterized in that, Including: The backup control board obtains the power supply state of the main power supply through the main control board; In the case of the main power supply being powered off, control the backup power supply to supply power to the electric heating element; Detect the oil temperature inside the compressor; According to the oil temperature inside the compressor, control the opening and closing of the electric heating element.

6. The control method for the air conditioner compressor oil temperature control system according to claim 5, characterized in that, The step of controlling the opening and closing of the electric heating element according to the oil temperature inside the compressor includes: Determine that the oil temperature inside the compressor is less than the target preset value, and control the electric heating element to be turned on; Determine that the oil temperature inside the compressor is greater than or equal to the target preset value, and control the electric heating element to be turned off.

7. The control method for the air conditioner compressor oil temperature control system according to claim 6, characterized in that, The step of determining that the oil temperature inside the compressor is less than the target preset value and controlling the electric heating element to be turned on includes: Determine that the oil temperature inside the compressor is less than the target preset value, control the main relay between the main control board and the electric heating element to be disconnected, and the backup relay between the backup control board and the electric heating element to be turned on, so as to turn on the electric heating element.

8. The control method for the air conditioner compressor oil temperature control system according to claim 5, characterized in that, Further including: In the case of being powered by the main power supply, control the main power supply to supply power to the electric heating element and charge the backup power supply; Detect the oil temperature inside the compressor; According to the oil temperature inside the compressor, control the opening and closing of the electric heating element.

9. The control method for the air conditioner compressor oil temperature control system according to claim 8, characterized in that, The step of controlling the opening and closing of the electric heating element according to the oil temperature inside the compressor includes: Determine that the oil temperature inside the compressor is less than the target preset value, and control the electric heating element to be turned on; Determine that the oil temperature inside the compressor is greater than or equal to the target preset value, and control the electric heating element to be turned off.

10. The control method of the air conditioner compressor oil temperature control system according to claim 9, characterized in that, The step of determining that the oil temperature inside the compressor is less than the target preset value and controlling the electric heating element to be turned on includes: Determine that the oil temperature in the compressor is less than the target preset value, control the standby relay located between the standby control board and the electric heating element to disconnect, and the main relay located between the main control board and the electric heating element to conduct, so as to turn on the electric heating element.

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