Air conditioner and method and system for detecting and processing temperature abnormity of compressor motor of air conditioner

Abstract

The invention discloses an air conditioner and a method and system for detecting and processing temperature abnormity of a compressor motor of the air conditioner, and the method comprises the steps: selecting one of a temperature sensor I and a temperature sensor II, detecting whether the state of the sensor is normal or not, if so, storing temperature data detected by the selected temperature sensor, otherwise, stopping storing; whether the state of the other temperature sensor is normal or not is automatically selected and detected; if the state of the other temperature sensor is normal, storing the temperature data detected by the other temperature sensor, otherwise, stopping storing; and judging the state of the temperature switch, if the temperature switch is closed, adopting the stored temperature data as the motor temperature, controlling the operation state of the motor according to the motor temperature, and if the temperature switch is disconnected, stopping the operation of the motor, reporting a fault and waiting for maintenance. According to the invention, one used temperature sensor and one standby temperature sensor can be automatically switched and used, and the compressor motor can continue to work when the two temperature sensors fail, so that the usability is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air-conditioner compressor motor temperature monitoring, and relates to a method and system for detecting and processing abnormal temperature of an air-conditioner and its compressor motor. Background Art

[0002] To prevent the compressor motor from overheating, a temperature sensor must be installed inside the motor. To address the inconvenience of replacing sensors inside the motor, two temperature sensors are typically installed: one for active use and one for backup. If one sensor fails, the wiring must be changed to switch to the backup sensor. If both sensors fail, the system will not function properly. This approach requires manual intervention and is inconvenient to use. Summary of the Invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a method and system for detecting and processing abnormal temperature of an air conditioner and a compressor motor thereof.

[0004] The present invention adopts the following technical solutions.

[0005] A first aspect of the present invention provides a method for detecting and processing abnormal temperature of an air-conditioning compressor motor, wherein a first temperature sensor, a second temperature sensor, and a temperature switch are provided in the compressor motor, and the method comprises:

[0006] Select one of the temperature sensor 1 and temperature sensor 2 to detect whether its status is normal. If it is normal, save the temperature data detected by the selected temperature sensor. Otherwise, stop saving and automatically select to detect whether the status of the other temperature sensor is normal. If the status of the other temperature sensor is normal, save the temperature data detected by the other temperature sensor. Otherwise, stop saving.

[0007] Determine the status of the temperature switch. If it is closed, the saved temperature data is used as the motor temperature, and the motor operation status is controlled according to the motor temperature. If it is disconnected, the motor stops running and reports a fault waiting for maintenance.

[0008] Preferably, the temperature switch has an operating temperature threshold, and is closed when the temperature inside the motor does not exceed the operating temperature threshold, and is opened when the temperature inside the motor exceeds the operating temperature threshold.

[0009] Preferably, the method for detecting whether the state of the temperature sensor is normal includes:

[0010] Check whether the temperature sensor is open, short or has a sudden change in temperature. If so, the temperature sensor is abnormal, otherwise it is normal.

[0011] Preferably, controlling the operating state of the motor according to the motor temperature includes:

[0012] If the motor temperature is lower than a set value, the motor is controlled to operate normally; otherwise, the motor is controlled to stop operating, wherein the set value is lower than the action temperature threshold of the temperature switch.

[0013] A second aspect of the present invention provides a system for detecting and processing abnormal temperature of an air-conditioning compressor motor, comprising:

[0014] An automatic switching device is used to select one of the temperature sensor 1 and the temperature sensor 2 to be connected to the detection device and automatically switch the other temperature sensor to be connected to the detection device when the temperature sensor connected to the detection device is in an abnormal state;

[0015] The detection device is used to detect whether the state of the currently connected temperature sensor is normal. If it is normal, the temperature data detected by the currently connected temperature sensor is saved; otherwise, the saving is stopped;

[0016] The judgment module is used to judge the state of the temperature switch. If it is closed, the saved temperature data is used as the motor temperature and the motor operation state is controlled according to the motor temperature. If it is disconnected, the motor stops running and reports a fault waiting for maintenance.

[0017] Preferably, the automatic switching device includes a relay K1 and a relay K2, and the relay K1 and the relay K2 each include a control terminal 1, a control terminal 2, a normally open contact, a common terminal and a normally closed contact;

[0018] Among them, the normally open contacts of relay K1 and relay K2 are connected to the two ends of temperature sensor 1 respectively;

[0019] The normally closed contacts of relay K1 and relay K2 are connected to the two ends of temperature sensor 2 respectively;

[0020] The common terminals of relay K1 and relay K2 are connected to the detection device respectively;

[0021] When the control terminals 1 and 2 of the same relay are energized, the common terminal and the normally open contact of the corresponding relay are connected;

[0022] When the control terminals 1 and 2 of the same relay are not powered, the common terminal and normally closed contact of the corresponding relay are connected.

[0023] Preferably, the automatic switching device controls the temperature sensor 1 or the temperature sensor 2 to access the temperature detection device through the relay K1 and the relay K2, specifically including:

[0024] When the control terminals 1 and 2 of relay K1 and relay K2 are both energized, the common terminal of relay K1 and the normally open contact are connected, and the common terminal of relay K2 and the normally open contact are connected, then the temperature sensor 1 is connected to the detection device;

[0025] When the control terminals 1 and 2 of relays K1 and K2 are not powered, the common terminal of relay K1 and the normally closed contact are connected, and the common terminal of relay K2 and the normally closed contact are connected, then the temperature sensor 2 is connected to the detection device.

[0026] A third aspect of the present invention provides an air conditioner, comprising the processing system, wherein a first temperature sensor, a second temperature sensor and a temperature switch are provided in a compressor motor.

[0027] A fourth aspect of the present invention provides a readable storage medium having a program stored thereon, wherein the program implements the processing method when executed by a processor.

[0028] Compared with the prior art, the beneficial effects of the present invention include at least:

[0029] The present invention can automatically switch to use one active and one standby temperature sensor, and automatically switch to use the other standby sensor to obtain temperature data after determining that the current sensor is abnormal. When both sensors are abnormal, the temperature saved before the temperature sensor becomes abnormal can be used as the motor temperature, so that the compressor motor operation can be controlled according to the motor temperature when the temperature switch is normally closed, so that the compressor motor can continue to work when a single temperature sensor fails or both temperature sensors fail, thereby improving availability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of a method for detecting and processing abnormal temperature of an air-conditioning compressor motor;

[0031] Figure 2 This is a structural diagram of a detection and processing system for abnormal temperature of an air-conditioning compressor motor;

[0032] Figure 2 The reference numerals in the drawings are: 1-control terminal 1, 2-control terminal 2, 3-normally open contact, 4-common terminal, 5-normally closed contact;

[0033] Figure 3 Schematic diagram of the temperature switch. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0035] Embodiment 1 of the present invention provides a method for detecting and processing abnormal temperature of an air-conditioning compressor motor. Two temperature sensors (temperature sensor 1 and temperature sensor 2) are arranged in the compressor motor, and a temperature switch is arranged. The temperature switch is placed inside the motor and has no connection with other components. When the temperature is too high, the temperature switch is disconnected, and when the temperature is normal, the temperature switch is connected. Figure 1 As shown, the method includes:

[0036] Select one of the temperature sensor 1 and temperature sensor 2 to detect whether its status is normal. If it is normal, save the temperature data detected by the selected temperature sensor. Otherwise, stop saving and automatically select to detect whether the status of the other temperature sensor is normal. If the status of the other temperature sensor is normal, save the temperature data detected by the other temperature sensor. Otherwise, stop saving.

[0037] Determine the status of the temperature switch. If it is closed, the temperature data detected by the stored temperature sensor is used as the motor temperature, and the motor operation status is controlled according to the motor temperature. If it is disconnected, the motor stops running and reports a fault waiting for maintenance.

[0038] More preferably, Figure 3 The temperature switch shown has an operating temperature threshold, is closed when the temperature inside the motor does not exceed the operating temperature threshold, and is opened when the temperature inside the motor exceeds the operating temperature threshold.

[0039] Methods for detecting whether the temperature sensor is in normal state include:

[0040] Checks whether the temperature sensor is open, short, or experiencing a sudden change in temperature. If so, the temperature sensor is abnormal; otherwise, it is normal. The temperature value refers to the temperature detected by the sensor. A sudden change in temperature is determined when the absolute value of the temperature change within a set second-level time exceeds a set threshold.

[0041] It is understandable that when the temperature switch is not disconnected, it means that the actual motor temperature has not exceeded the limit (operation temperature threshold), and using the temperature detected by the saved temperature sensor as the motor temperature has little effect. Controlling the motor's operating status based on the motor temperature includes:

[0042] If the motor temperature is lower than a set value, the motor is controlled to operate normally; otherwise, the motor is controlled to stop operating, wherein the set value is lower than the action temperature threshold of the temperature switch.

[0043] For special situations, such as when both temperature sensor 1 and temperature sensor 2 are abnormal and there is no saved temperature data, you can set a corresponding alarm strategy.

[0044] Embodiment 2 of the present invention provides a system for detecting and processing abnormal temperature of an air-conditioning compressor motor, comprising:

[0045] An automatic switching device is used to select one of the temperature sensor 1 and the temperature sensor 2 to be connected to the detection device and automatically switch the other temperature sensor to be connected to the detection device when the temperature sensor connected to the detection device is in an abnormal state;

[0046] The detection device is used to detect whether the state of the currently connected temperature sensor is normal. If it is normal, the temperature data obtained by the currently connected temperature sensor is saved; otherwise, the saving is stopped;

[0047] The judgment module is used to judge the state of the temperature switch. If it is closed, the saved temperature data is used as the motor temperature and the motor operation state is controlled according to the motor temperature. If it is disconnected, the motor stops running and reports a fault waiting for maintenance.

[0048] The process of detecting and processing the abnormal temperature of the air-conditioning compressor motor by the detection and processing system includes:

[0049] (1) The automatic switching device controls the temperature sensor 1 or the temperature sensor 2 to connect to the detection device;

[0050] (2) The detection device detects whether the currently connected temperature sensor is normal. If normal, the temperature data obtained by the currently connected temperature sensor is saved and the process proceeds to (5). Otherwise, the process stops saving and the process proceeds to (3).

[0051] Further preferably, the detection device detects whether the currently connected temperature sensor is normal, including:

[0052] Detect whether the currently connected temperature sensor is open, short, or has a sudden change in temperature. If so, the temperature sensor is normal; otherwise, it is abnormal. The judgment method for the sudden change in temperature value is: when the absolute value of the temperature change within the set second time exceeds the set threshold, the temperature value suddenly changes.

[0053] (3) The automatic switching device controls another temperature sensor to connect to the detection device;

[0054] Further preferably, when the detection device detects that the temperature sensor is abnormal, the detection device sends a switching instruction to the automatic switching device, and the automatic switching device controls another temperature sensor to connect to the detection device after receiving the instruction;

[0055] (4) The detection device detects whether the currently connected temperature sensor (another temperature sensor) is normal. If normal, the temperature data obtained by the currently connected temperature sensor is saved and the process proceeds to (5). Otherwise, the process stops saving and the process proceeds to (5).

[0056] (5) The judgment module determines whether the temperature switch is normal (closed). If it is normal, the saved temperature data is used as the motor temperature and the motor operation status is controlled according to the motor temperature. Otherwise, a fault is reported and maintenance is required.

[0057] Further preferably, the automatic switching device may be a relay or other electronic components with a switching function.

[0058] In this embodiment, Figure 2 As shown, the automatic switching device includes two relays (relay K1 and relay K2), and the 1st to 5th pins of the relay are control terminal 1, control terminal 2, normally open contact 3, common terminal 4 and normally closed contact 5 respectively.

[0059] The normally open contacts 3 of K1 and K2 are connected to the two ends of temperature sensor 1 respectively;

[0060] The normally closed contacts 5 of K1 and K2 are connected to the two ends of the temperature sensor 2 respectively;

[0061] The common terminals 4 of K1 and K2 are respectively connected to temperature detection devices.

[0062] When the relay control terminal 1 and control terminal 2 are energized, the common terminal 4 and the normally open contact 3 are connected;

[0063] When the relay control terminal 1 and control terminal 2 are not powered, the common terminal 4 and the normally closed contact 5 are connected.

[0064] The relay controls whether temperature sensor 1 or temperature sensor 2 is connected to the temperature detection device, as follows:

[0065] When K1 and K2 are both energized, the common terminal 4 of K1 and the normally open contact 3 are connected, and the common terminal 4 of K2 and the normally open contact 3 are connected, then the temperature sensor 1 is connected to the temperature detection device;

[0066] When both K1 and K2 are not powered, the common terminal 4 of K1 and the normally closed contact 5 are connected, the common terminal 4 of K2 and the normally closed contact 5 are connected, and the temperature sensor 2 is connected to the temperature detection device.

[0067] The judgment module is used to judge whether the temperature switch is normal. If it is normal, the saved temperature data is used as the motor temperature. Otherwise, a fault is reported and maintenance is required.

[0068] The process of implementing abnormal temperature treatment of the air-conditioning compressor motor in the above system is as follows:

[0069] (1) Power on relays K1 and K2 to connect temperature sensor 1 to the temperature detection device;

[0070] (2) Detect the motor temperature sensor 1 and determine whether the current temperature sensor is normal. If normal, save the temperature. If abnormal, stop saving the temperature and proceed to (3);

[0071] Specifically, the temperature sensor abnormality judgment method is: the sensor is open or short-circuited, or the temperature value suddenly changes to an abnormal state;

[0072] The method for judging a sudden change in temperature is as follows: when the absolute value of the temperature change within tset (unit: seconds) exceeds Tset (unit: °C), it is considered a sudden change in temperature. tset and Tset can be set based on actual experimental tests, such as 5 for tset and 20 for Tset.

[0073] The data saving method is: save the temperature once every t seconds, save it n times in total, and get the temperature T1~Tn within nt seconds. Tn can be taken as the motor temperature; among them, n and t can be defined according to actual needs, such as n takes the value of 5 and t takes the value of 1.

[0074] (3) De-energize relays K1 and K2, so that temperature sensor 2 is connected to the temperature detection device, that is, the temperature is switched to motor temperature 2;

[0075] (4) Determine whether the current temperature sensor is normal. If normal, save the temperature T1 to Tn within nt seconds (the saving method is consistent with that described in (2)). Tn can be taken as the motor temperature. If abnormal, stop saving the temperature and proceed to (5);

[0076] (5) Determine whether the temperature switch is normal. If it is normal, take Tn as the motor temperature. If it is abnormal, report a fault and wait for maintenance.

[0077] Embodiment 3 of the present invention provides an air conditioner, which includes the processing system described above, and a first temperature sensor, a second temperature sensor, and a temperature switch are provided in a compressor motor.

[0078] Embodiment 4 of the present invention provides a readable storage medium having a program stored thereon, and the program implements the processing method when executed by a processor.

[0079] Compared with the prior art, the beneficial effects of the present invention include at least:

[0080] The present invention can automatically switch to use one active and one standby temperature sensor, and automatically switch to use the other standby sensor to obtain temperature data after determining that the current sensor is abnormal. When both sensors are abnormal, the temperature saved before the temperature sensor is abnormal is used as the motor temperature, so that the compressor motor operation is controlled according to the motor temperature when the temperature switch is normal, so that the compressor motor can continue to work when a single temperature sensor fails or both temperature sensors fail, thereby improving availability.

[0081] The present disclosure may be a system, method and / or computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0082] A computer-readable storage medium can be a tangible device that can hold and store instructions for use by an instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination thereof. As used herein, a computer-readable storage medium is not to be construed as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through an electrical wire.

[0083] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions to be stored in the computer-readable storage medium in each computing / processing device.

[0084] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, and conventional procedural programming languages ​​such as "C" language or similar programming languages. Computer-readable program instructions may be executed entirely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., utilizing an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be personalized by utilizing the state information of the computer-readable program instructions. The electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A method for detecting and processing abnormal temperature of an air-conditioning compressor motor, wherein a first temperature sensor, a second temperature sensor, and a temperature switch are provided in the compressor motor, characterized in that: The method comprises: Select one of the temperature sensor 1 and temperature sensor 2 to detect whether its status is normal. If it is normal, save the temperature data detected by the selected temperature sensor. Otherwise, stop saving and automatically select to detect whether the status of the other temperature sensor is normal. If the status of the other temperature sensor is normal, save the temperature data detected by the other temperature sensor. Otherwise, stop saving. Determine the status of the temperature switch. If it is closed, the temperature data detected by the stored temperature sensor is used as the motor temperature, and the motor operation status is controlled according to the motor temperature. If it is disconnected, the motor stops running and reports a fault waiting for maintenance.

2. The method for detecting and processing abnormal temperature of an air-conditioning compressor motor according to claim 1, characterized in that: The temperature switch has an action temperature threshold, is closed when the temperature inside the motor does not exceed the action temperature threshold, and is opened when the temperature inside the motor exceeds the action temperature threshold.

3. The method for detecting and processing abnormal temperature of an air-conditioning compressor motor according to claim 1, characterized in that: Methods for detecting whether the temperature sensor is in normal state include: Check whether the temperature sensor is open, short or has a sudden change in temperature. If so, the temperature sensor is abnormal, otherwise it is normal.

4. The method for detecting and processing abnormal temperature of an air-conditioning compressor motor according to claim 1, characterized in that: The controlling the operating state of the motor according to the motor temperature includes: If the motor temperature is lower than a set value, the motor is controlled to operate normally; otherwise, the motor is controlled to stop operating, wherein the set value is lower than the action temperature threshold of the temperature switch.

5. A system for detecting and processing abnormal temperature of an air-conditioning compressor motor, running the method according to any one of claims 1 to 4, characterized in that: The system comprises: An automatic switching device is used to select one of the temperature sensor 1 and the temperature sensor 2 to be connected to the detection device and automatically switch the other temperature sensor to be connected to the detection device when the temperature sensor connected to the detection device is in an abnormal state; The detection device is used to detect whether the state of the currently connected temperature sensor is normal. If it is normal, the temperature data detected by the currently connected temperature sensor is saved; otherwise, the saving is stopped; The judgment module is used to judge the state of the temperature switch. If it is closed, the temperature data detected by the stored temperature sensor is used as the motor temperature, and the running state of the motor is controlled according to the motor temperature. If it is disconnected, the motor stops running and reports a fault waiting for maintenance.

6. The system for detecting and processing abnormal temperature of an air-conditioning compressor motor according to claim 5, characterized in that: The automatic switching device includes a relay K1 and a relay K2, and the relay K1 and the relay K2 each include a control terminal 1, a control terminal 2, a normally open contact, a common terminal and a normally closed contact; Among them, the normally open contacts of relay K1 and relay K2 are connected to the two ends of temperature sensor 1 respectively; The normally closed contacts of relay K1 and relay K2 are connected to the two ends of temperature sensor 2 respectively; The common terminals of relay K1 and relay K2 are connected to the detection device respectively; When the control terminals 1 and 2 of the same relay are energized, the common terminal and the normally open contact of the corresponding relay are connected; When the control terminals 1 and 2 of the same relay are not powered, the common terminal and normally closed contact of the corresponding relay are connected.

7. The system for detecting and processing abnormal temperature of an air-conditioning compressor motor according to claim 6, characterized in that: The automatic switching device controls the temperature sensor 1 or the temperature sensor 2 to access the temperature detection device through the relay K1 and the relay K2, specifically including: When the control terminals 1 and 2 of relay K1 and relay K2 are both energized, the common terminal of relay K1 and the normally open contact are connected, and the common terminal of relay K2 and the normally open contact are connected, then the temperature sensor 1 is connected to the detection device; When the control terminals 1 and 2 of relays K1 and K2 are not powered, the common terminal of relay K1 and the normally closed contact are connected, and the common terminal of relay K2 and the normally closed contact are connected, then the temperature sensor 2 is connected to the detection device.

8. An air conditioner, characterized in that: The air conditioner comprises the processing system according to any one of claims 5 to 7, and a temperature sensor 1, a temperature sensor 2 and a temperature switch are provided in the compressor motor.

9. A readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the processing method according to any one of claims 1 to 4 is implemented.

Images