Temperature measurement and control device and method for motor rotor of compressor

Abstract

The invention discloses a temperature measurement and control device and method for a motor rotor of a compressor, and belongs to the technical field of motors, and the temperature measurement and control method for the motor rotor of the compressor comprises the following steps: collecting temperature data of the motor rotor, and obtaining a corrected temperature value T (t) through calibration; presetting a time window length, and calculating a temperature rise value delta T of the correction temperature value T (t) in each time window length; when T (t) is larger than or equal to T1, liquid spraying cooling is conducted on the motor rotor till T (t) is smaller than T1, and T1 is a preset temperature threshold value; and when deltaT is larger than or equal to deltaT1, the compressor is controlled to stop running, an alarm is sent, and deltaT1 is a preset temperature rise threshold value. The rotor temperature measurement element, the monitoring device, the energy supply system, the cooling liquid spraying device and the background system form a complete motor rotor temperature detection and control system, and the temperature of the motor rotor can be accurately measured and controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a temperature measurement and control device and method for a compressor motor rotor. Background Art

[0002] The air-conditioning compressor is the core component of the refrigeration system, and the compressor motor is generally enclosed inside the compressor. The rotation of the motor rotor drives the compressor rotor to rotate to compress the gas. When the motor rotor is rotating, the temperature of the motor rotor's magnet cannot be tested by conventional means. The rotor temperature has a great influence on the magnetic properties of the motor magnet. This makes it impossible to evaluate the temperature of the motor rotor during operation to determine whether the compressor motor is reliable during operation, and there is a lack of important basis for evaluating the reliability of the motor.

[0003] Some temperature measuring devices are directly installed on the motor rotor, which will affect the magnetism of the magnetic steel in the motor rotor and affect the normal operation and temperature detection of the motor rotor. In addition, the temperature measuring device is located inside a closed compressor. Most temperature measuring devices are powered by batteries, so their operating time inside the compressor is limited and they need to be replaced regularly, which is inconvenient to use. At the same time, the temperature measuring device cannot correct the temperature, and there is a temperature error. Moreover, it is easy to cause misjudgment if the temperature status of the motor rotor is determined only by the temperature value. Moreover, the motor temperature cannot be reduced in time after temperature measurement, resulting in damage to the motor and reduced durability. Summary of the Invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a compressor motor rotor temperature measurement and control device and method.

[0005] The present invention adopts the following technical solutions.

[0006] A first aspect of the present invention discloses a method for measuring and controlling the temperature of a compressor motor rotor, comprising the following steps:

[0007] Collect the temperature data of the motor rotor and obtain the corrected temperature value T(t) through calibration;

[0008] Preset the time window length and calculate the temperature rise value ΔT of the corrected temperature value T(t) within each time window length;

[0009] When T(t)≥T1, the motor rotor is cooled by spraying liquid until T(t)<T1, where T1 is the preset temperature threshold;

[0010] When ΔT≥ΔT1, the compressor is controlled to stop and a warning is issued, wherein ΔT1 is a preset temperature rise threshold. Preferably, the temperature data of the motor rotor is collected and the corrected temperature value T(t) is obtained by calibration, including:

[0011] The temperature data of the motor rotor is collected according to the preset sampling rate f as the original output value Traw;

[0012] Substitute the original output value Traw into the following formula for calibration:

[0013] T(t)=a·Traw+b

[0014] Where a and b are calibration constants obtained through calibration experiments.

[0015] Preferably, the calibration experiment includes: using a standard temperature source to collect original output values ​​Traw at multiple temperature points, the standard temperature source outputs corresponding temperature standard values ​​Ttrue, substituting the multiple original output values ​​Traw and the corresponding temperature standard values ​​Ttrue into the formula Ttrue=a·Traw+b, and then determining the calibration constants a and b.

[0016] Preferably, the preset time window length and calculation of the temperature rise value ΔT of the corrected temperature value T(t) within each time window length include:

[0017] Preset the time window length ti, obtain each T(t) and T(t+ti) after a time window length ti;

[0018] Substitute T(t) and T(t+ti) into the formula ΔT=T(t+ti)-T(t) to obtain the temperature rise value ΔT.

[0019] The second aspect of the present invention discloses a compressor motor rotor temperature measurement and control device, comprising: a cooling liquid spray device, a rotor temperature measuring element, a monitoring device, a background system, and an energy supply system, wherein the liquid spray outlet of the cooling liquid spray device is connected to the outer wall of the compressor housing;

[0020] The energy supply system is arranged inside the compressor housing and is connected to the monitoring device and the rotor temperature measuring element;

[0021] The rotor temperature measuring element is arranged on the compressor male rotor shaft at a position corresponding to the inner circumference of the motor rotor, and is used to collect temperature data of the motor rotor;

[0022] The monitoring device is connected to the rotor temperature measuring element and is used to monitor the temperature data collected by the rotor temperature measuring element and transmit the temperature data to the background system;

[0023] The background system is used to calibrate the temperature data to obtain a corrected temperature value T(t); preset a time window length, calculate the temperature rise value ΔT of the corrected temperature value T(t) within each time window length; and when T(t)≥T1, control the cooling spray device to spray liquid to cool the motor rotor until T(t)<T1; when ΔT≥ΔT1, control the compressor to stop and send a warning, where T1 is a preset temperature threshold and ΔT1 is a preset temperature rise threshold.

[0024] Preferably, the compressor housing is provided with a compressor suction side and a compressor exhaust side, a compressor casting is provided on the inner wall of the compressor exhaust side, the compressor suction side is connected to the cooling liquid spray device through a valve body, and the energy supply system is provided inside the compressor casting;

[0025] When the compressor is running, the suction side of the compressor inhales gas, which can bring the liquid sprayed by the cooling spray device into the compressor. The gas is compressed by the screw rotor of the compressor to form high-pressure gas. The high-pressure gas flows back to the exhaust side of the compressor and is sprayed out, so that the energy supply system operates under the drive of the high-pressure gas.

[0026] Preferably, the energy supply system comprises a small power generation device, an impeller and a conductive ring connected in sequence;

[0027] The impeller is driven to rotate by high-pressure gas to operate the small power generation device, and the small power generation device supplies energy to the monitoring device and the rotor temperature measuring element through the conductive ring.

[0028] A third aspect of the present invention discloses a compressor, comprising the compressor motor rotor temperature measurement and control device.

[0029] A fourth aspect of the present invention discloses an air conditioner, comprising the aforementioned compressor.

[0030] A fifth aspect of the present invention discloses a computer-readable storage medium, which stores a computer program. The computer-readable storage medium is characterized in that when the computer program is executed by a processor, it implements the method for measuring and controlling the temperature of a compressor motor rotor.

[0031] The beneficial effect of the present invention is that, compared with the prior art,

[0032] The present invention forms a complete motor rotor temperature detection and control system through a rotor temperature measuring element, a monitoring device, an energy supply system, a cooling spray device and a background system. During the operation of the compressor, the motor rotor temperature is detected in real time by the rotor temperature measuring element, and the temperature data signal is sent to the background system in real time through the monitoring device, thereby realizing real-time monitoring of the motor rotor temperature. At the same time, the background system can analyze the temperature data to obtain the corrected temperature value T(t) and the temperature rise value ΔT within the time window length of ti, and compare the corrected temperature value T(t) and the temperature rise value ΔT with the preset temperature threshold T1 and the temperature rise threshold ΔT1 respectively, thereby controlling the opening and closing of the cooling spray device, adjusting the operating status of the compressor and sending a warning; realizing timely lowering of the motor temperature and adjusting the compressor status after temperature measurement, thereby avoiding damage to the motor, improving the durability of the compressor, and improving the reliability of motor operation.

[0033] The present invention drives the energy supply system through the high-pressure gas compressed by the screw rotor when the compressor is running, and then supplies energy to the monitoring device and the rotor temperature measuring element, so that the monitoring device and the rotor temperature measuring element can operate permanently inside the closed compressor without replacement, and are easy to use. The conductive ring prevents the circuit from being kinked during energy supply.

[0034] The rotor temperature measuring element of the present invention is arranged on the compressor male rotor shaft to prevent the rotor temperature measuring element from affecting the magnetism of the motor rotor. At the same time, the rotor temperature measuring element is located on the inner circumference of the motor rotor to still accurately detect the temperature of the motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a cross-sectional view of a temperature measuring and controlling device for a compressor motor rotor according to the present invention;

[0036] Figure 2 This is a side view of a compressor motor rotor temperature measurement and control device of the present invention;

[0037] Figure 3 This is a flow chart of a compressor motor rotor temperature measurement and control method of the present invention;

[0038] In the figure: 1. Motor stator; 2. Motor rotor; 3. Compressor housing; 4. Rotor temperature measuring element; 5. Temperature measuring element lead; 6. Monitoring device; 7. Small power generation device; 8. Impeller; 9. Compressor male rotor shaft; 10. Compressor exhaust side; 11. Compressor suction side; 12. Temperature measuring element lead channel; 13. Compressor casting; 14. Conductive ring; 15. Screw rotor; 16. Valve body. DETAILED DESCRIPTION

[0039] 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.

[0040] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0041] like Figure 1 and Figure 2 As shown, the present invention discloses a compressor motor rotor temperature measurement and control device, comprising: a cooling liquid spray device, a rotor temperature measuring element 4, a monitoring device 6, a background system and an energy supply system, wherein the right side of the compressor housing 3 is provided with a compressor suction side 11 and an outer wall is provided with a valve body 16, the valve body 16 is connected to the cooling liquid spray device, and a rotor temperature measuring element 4 is provided on the compressor male rotor shaft 9 at a position corresponding to the inner circumference of the motor rotor 2, the rotor temperature measuring element 4 is used to monitor the temperature data collected by the rotor temperature measuring element 4 and transmit it to the background system through the monitoring device 6; the background system is used to calibrate the temperature data to obtain a corrected temperature value T(t); a time window length is preset, and a temperature rise value ΔT of the corrected temperature value T(t) within each time window length is calculated; and when T(t)≥T1, the cooling liquid spray device is controlled to spray liquid to cool the motor rotor (2) until T(t)<T1; when ΔT≥ΔT1, the compressor is controlled to stop and a warning is sent, wherein T1 is a preset temperature threshold and ΔT1 is a preset temperature rise threshold.

[0042] The right inner circumference of the compressor housing 3 is connected to the motor stator 1, the motor rotor 2 is arranged on the inner side of the motor stator 1, the inner side of the motor rotor 2 is connected to the compressor male rotor shaft 9, the screw rotor 15 is arranged on the left end of the compressor male rotor shaft 9, the corresponding connection position of the compressor male rotor shaft 9 and the motor rotor 2 is fixedly connected to the rotor temperature measuring element 4 through a thread, and the left position of the compressor male rotor shaft 9 corresponding to the rotor temperature measuring element 4 is fixedly connected to the monitoring device 6 through a thread, and the monitoring device 6 is used to send a signal to the background system; a lead channel 12 is provided inside the compressor male rotor shaft 9, and a temperature measuring element lead 5 is provided in the lead channel 12, and the two ends of the temperature measuring element lead 5 are respectively connected to the rotor temperature measuring element 4 and the monitoring device 6.

[0043] In a specific embodiment, the motor rotor 2 rotates to drive the compressor male rotor shaft 9 to rotate, the rotor temperature measuring element 4 detects the temperature inside the motor rotor 2 and sends the temperature data to the monitoring device 6, and the monitoring device 6 transmits the temperature data to the background system. The rotor temperature measuring element 4 is set on the compressor male rotor shaft 9 to avoid affecting the magnetic properties of the motor rotor 2. At the same time, it is located at the inner circumference of the motor rotor 2 to accurately detect the temperature of the motor rotor 2.

[0044] The compressor housing 3 is provided with a compressor suction side 11 on the right side and a compressor exhaust side 10 on the upper side. A compressor casting 13 is provided on the inner wall of the compressor exhaust side 10. The compressor suction side 11 is connected to the cooling liquid spray device through a valve body 16. The energy supply system is provided inside the compressor casting 13.

[0045] When the compressor is running, the compressor suction side 11 inhales gas, which can bring the liquid sprayed by the cooling liquid spray device into the compressor. The gas is compressed by the screw rotor 15 to form high-pressure gas, and the high-pressure gas flows back to the compressor exhaust side 10 and is sprayed out, so that the energy supply system operates under the drive of the high-pressure gas.

[0046] The energy supply system includes a small power generation device 7, an impeller 8 and a conductive ring 14 connected in sequence, wherein the small power generation device 7 is arranged inside the compressor casting 13 and the impeller 8 is arranged on the upper end, and the conductive ring 14 is sleeved on the outer position of the monitoring device 6 on the compressor male rotor shaft 9. The conductive ring 14 is connected to the small power generation device 7 and does not rotate synchronously with the compressor male rotor shaft 9. The monitoring device 6 and the small power generation device 7 are connected through the conductive ring 14 to supply energy to the monitoring device 6 and the rotor temperature measuring element 4, while preventing the circuit from being kinked when the monitoring device 6 rotates with the compressor male rotor shaft 9.

[0047] The background system analyzes the temperature data of the rotor temperature measuring element 4. On the one hand, it obtains the corrected temperature value T(t) through calibration to avoid temperature errors that may cause misjudgment of the temperature of the motor rotor 2, thereby improving the reliability of the temperature measurement data. On the other hand, it presets the ti time window length and calculates the temperature rise value ΔT of the corrected temperature value T(t) within each ti time window length, thereby avoiding the limitations of single temperature data in judging the state of the motor rotor 2 and being able to adapt to complex temperature change environments. The background system compares the corrected temperature value T(t) and the temperature rise value ΔT with the preset temperature threshold T1 and the temperature rise threshold ΔT1 respectively, thereby controlling the state switching of the cooling spray device and the compressor and issuing an alarm, thereby timely reducing and adjusting the temperature of the motor rotor 2 after temperature measurement, thereby avoiding damage to the motor, improving the durability of the compressor, and improving the reliability of motor operation.

[0048] Preferably, the rotor temperature measuring element 4 may be a resistor and form a complete circuit with the monitoring device 6 .

[0049] In a specific embodiment, when the compressor is running, the compressor male rotor shaft 9 rotates, the screw rotor 15 rotates synchronously, the conductive ring 14 remains stationary, and the gas is compressed by the screw rotor 15 to form high-pressure gas. The high-pressure gas flows back to the exhaust side 10 of the compressor and is ejected. The high-pressure gas drives the impeller 8 to rotate and drives the small power generation device 7 to operate. The small power generation device 7 supplies energy to the monitoring device 6 and the rotor temperature measuring element 4 through the conductive ring 14, so that the monitoring device 6 and the rotor temperature measuring element 4 can operate for a long time inside the closed compressor without replacement, and are easy to use. When the cooling liquid spray device is running, the liquid sprayed from the valve body 6 will follow the gas from the compressor suction side 11 into the compressor to cool the motor rotor 2.

[0050] like Figure 3 As shown, the present invention also discloses a method for measuring and controlling the temperature of a compressor motor rotor, comprising the following steps:

[0051] Step 1: Collect the temperature data of the motor rotor and obtain the corrected temperature value T(t) through calibration;

[0052] Step 2: Preset the time window length and calculate the temperature rise value ΔT of the corrected temperature value T(t) within each time window length;

[0053] Step 3: When T(t) ≥ T1, the motor rotor is cooled by spraying liquid until T(t) < T1, where T1 is a preset temperature threshold;

[0054] Step 4: When ΔT ≥ ΔT1, the compressor is controlled to stop and a warning is sent, where ΔT1 is a preset temperature rise threshold.

[0055] Preferably but not limiting, step 1 specifically includes:

[0056] Step 1.1: Collect the temperature data of the motor rotor according to the preset sampling rate f as the raw output value Traw;

[0057] Step 1.2: Substitute the original output value Traw into the following formula for calibration:

[0058] T(t)=a·Traw+b

[0059] Where a and b are calibration constants obtained through calibration experiments.

[0060] Said a and b are determined by the structural performance of the rotor temperature element 4 , a is the sensitivity error of the corrected rotor temperature element 4 , and b is the zero point error of the corrected rotor temperature element 4 .

[0061] The calibration experiment includes: using a standard temperature source to collect original output values ​​Traw at multiple temperature points, the standard temperature source outputs corresponding temperature standard values ​​Ttrue, substituting the multiple original output values ​​Traw and the corresponding temperature standard values ​​Ttrue into the formula Ttrue=a·Traw+b, and then determining calibration constants a and b.

[0062] Preferably but not limitatively, step 2 specifically includes:

[0063] Step 2.1: Preset the time window length ti, obtain each T(t) and T(t+ti) after a time window length ti;

[0064] Step 2.2: Substitute T(t) and T(t+ti) into the formula ΔT=T(t+ti)-T(t) to obtain the temperature rise ΔT.

[0065] To more clearly illustrate the outstanding essential features of the present invention and the significant advancements it brings to the prior art, an application example of the present invention is described below. The example includes the following steps:

[0066] Step 1: Collect the temperature data of the motor rotor and obtain the corrected temperature value T(t) through calibration;

[0067] Step 1.1: Collect the temperature data of the motor rotor at a preset sampling rate of 100 Hz as the raw output value Traw;

[0068] Step 1.2: Substitute the original output value Traw into the following formula for calibration:

[0069] T(t)=a·Traw+b

[0070] Step 2: Preset the time window length and calculate the temperature rise value ΔT of the corrected temperature value T(t) within each time window length;

[0071] Step 2.1: Preset the time window length to 10 seconds, obtain each T(t) and T(t+10) after a time window length of 10 seconds;

[0072] Step 2.2: Substitute T(t) and T(t+10) into the formula ΔT=T(t+10)-T(t) to obtain the temperature rise ΔT.

[0073] Step 3: When T(t) ≥ 100°C, spray the motor rotor to cool it down until T(t) < 100°C, where 100°C is the preset temperature threshold.

[0074] Step 4: When ΔT ≥ 100°C, the compressor is controlled to stop and a warning is sent, where 100°C is the preset temperature rise threshold.

[0075] The present invention can detect the temperature of the motor rotor 2 in real time through the above-mentioned device and method, thereby controlling the cooling liquid spray device to spray liquid to cool the motor rotor 2, control the temperature of the motor rotor 2, improve the operating stability of the unit, and at the same time adjust the compressor state to avoid abnormal compressor state.

[0076] The present invention forms a complete motor rotor temperature detection and control system through a rotor temperature measuring element, a monitoring device, an energy supply system, a cooling spray device and a background system. During the operation of the compressor, the motor rotor temperature is detected in real time by the rotor temperature measuring element, and the real-time temperature data signal is sent to the background system through the monitoring device, thereby realizing real-time monitoring of the motor rotor temperature. At the same time, the background system can analyze the temperature data to obtain the corrected temperature value Tcorrected and the temperature rise value ΔT within the time ti, and compare the corrected temperature value Tcorrected and the temperature rise value ΔT with the preset temperature threshold T1 and the temperature rise threshold ΔT1 respectively, thereby controlling the opening and closing of the cooling spray device, adjusting the operating state of the compressor and triggering the sending of a warning; after the temperature measurement, the motor temperature is timely lowered and the compressor state is adjusted to avoid damage to the motor, improve the durability of the compressor, and improve the reliability of the motor operation.

[0077] The present invention drives the energy supply system through the high-pressure gas compressed by the screw rotor when the compressor is running, and then supplies energy to the monitoring device and the rotor temperature measuring element, so that the monitoring device and the rotor temperature measuring element can operate permanently inside the closed compressor without replacement, and are easy to use. The conductive ring prevents the circuit from being kinked during energy supply.

[0078] The rotor temperature measuring element of the present invention is arranged on the compressor male rotor shaft to prevent the rotor temperature measuring element from affecting the magnetism of the motor rotor. At the same time, the rotor temperature measuring element is located on the inner circumference of the motor rotor to still accurately detect the temperature of the motor rotor.

[0079] The invention discloses a compressor, comprising the compressor motor rotor temperature measuring and controlling device.

[0080] The invention discloses an air conditioner, comprising the compressor.

[0081] The present invention discloses a computer-readable storage medium, which stores a computer program. The invention is characterized in that when the computer program is executed by a processor, a method for measuring and controlling the temperature of a compressor motor rotor is implemented.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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 measuring and controlling the temperature of a compressor motor rotor, characterized in that: The following steps are involved: Collect the temperature data of the motor rotor and obtain the corrected temperature value T(t) through calibration; Preset the time window length and calculate the temperature rise value ΔT of the corrected temperature value T(t) within each time window length; When T(t)≥T1, the motor rotor is cooled by spraying liquid until T(t)<T1, where T1 is the preset temperature threshold; When ΔT≥ΔT1, the compressor is controlled to stop and a warning is sent, where ΔT1 is the preset temperature rise threshold.

2. A compressor motor rotor temperature measurement and control method according to claim 1, characterized in that: The method of collecting the temperature data of the motor rotor and obtaining the corrected temperature value T(t) through calibration includes: The temperature data of the motor rotor is collected according to the preset sampling rate f as the original output value Traw; Substitute the original output value Traw into the following formula for calibration: T(t)=a·Traw+b Where a and b are calibration constants obtained through calibration experiments.

3. The method for measuring and controlling the temperature of a compressor motor rotor according to claim 2, wherein: The calibration experiment includes: using a standard temperature source to collect original output values ​​Traw at multiple temperature points, the standard temperature source outputs corresponding temperature standard values ​​Ttrue, substituting the multiple original output values ​​Traw and the corresponding temperature standard values ​​Ttrue into the formula Ttrue=a·Traw+b, and then determining calibration constants a and b.

4. The method for measuring and controlling the temperature of a compressor motor rotor according to claim 1, wherein: The preset time window length, calculating the temperature rise value ΔT of the corrected temperature value T(t) within each time window length, includes: Preset the time window length ti, obtain each T(t) and T(t+ti) after a time window length ti; Substitute T(t) and T(t+ti) into the formula ΔT=T(t+ti)-T(t) to obtain the temperature rise value ΔT.

5. A compressor motor rotor temperature measurement and control device, comprising: The cooling liquid spray device, rotor temperature measuring element, monitoring device, background system and energy supply system are characterized by: The liquid spray outlet of the cooling liquid spray device is connected to the outer wall of the compressor housing; The energy supply system is arranged inside the compressor housing and is connected to the monitoring device and the rotor temperature measuring element; The rotor temperature measuring element is arranged on the compressor male rotor shaft at a position corresponding to the inner circumference of the motor rotor, and is used to collect temperature data of the motor rotor; The monitoring device is connected to the rotor temperature measuring element and is used to monitor the temperature data collected by the rotor temperature measuring element and transmit the temperature data to the background system; The background system is used to calibrate the temperature data to obtain a corrected temperature value T(t); preset a time window length, calculate the temperature rise value ΔT of the corrected temperature value T(t) within each time window length; and when T(t)≥T1, control the cooling spray device to spray liquid to cool the motor rotor until T(t)<T1; when ΔT≥ΔT1, control the compressor to stop and send a warning, where T1 is a preset temperature threshold and ΔT1 is a preset temperature rise threshold.

6. The compressor motor rotor temperature measurement and control device according to claim 5, characterized in that: The compressor housing is provided with a compressor suction side and a compressor exhaust side, a compressor casting is provided on the inner wall of the compressor exhaust side, the compressor suction side is connected to the cooling liquid spray device through a valve body, and the energy supply system is provided inside the compressor casting; When the compressor is running, the suction side of the compressor inhales gas, which can bring the liquid sprayed by the cooling spray device into the compressor. The gas is compressed by the screw rotor of the compressor to form high-pressure gas. The high-pressure gas flows back to the exhaust side of the compressor and is sprayed out, so that the energy supply system operates under the drive of the high-pressure gas.

7. The compressor motor rotor temperature measurement and control device according to claim 6, characterized in that: The energy supply system includes a small power generation device, an impeller and a conductive ring connected in sequence; The impeller is driven to rotate by high-pressure gas to operate the small power generation device, and the small power generation device supplies energy to the monitoring device and the rotor temperature measuring element through the conductive ring.

8. A compressor, characterized in that: The device comprises the compressor motor rotor temperature measurement and control device according to any one of claims 5 to 7.

9. An air conditioner, characterized in that: A compressor comprising the compressor described in claim 8.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, a compressor motor rotor temperature measurement and control method according to any one of claims 1 to 4 is implemented.

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