Temperature Detection Method, Temperature Control Method and Related Equipment of Compressor

Abstract

The present application discloses a temperature detection method, a temperature control method and related equipment for a compressor, relating to the technical field of electrical appliances, which can detect the temperature of the compressor without increasing costs, and then control the temperature of the compressor to avoid the excessive temperature of the compressor affecting the life and reliability of the compressor. A temperature detection method for a compressor includes: obtaining the temperature of an inverter driving the compressor; determining the temperature of the compressor according to the temperature of the inverter, wherein the temperature of the compressor is positively correlated with the temperature of the inverter.

Description

Technical Field

[0001] This application relates to the technical field of electrical appliances, and particularly to a temperature detection method, a temperature control method and related equipment for a compressor. Background Art

[0002] At present, in refrigeration equipment, the compressor is a key core component. The compressor is equivalent to a heating element, and most of the heat is basically converted from electrical energy into mechanical energy, and then the mechanical energy is converted into heat energy, and the heat will be distributed in the compressor compartment. If the temperature rise of the compressor is too high, it is easy to reduce the service life of the compressor and reduce the reliability of the compressor. Therefore, the temperature monitoring of the compressor becomes particularly important. However, the existing temperature detection methods for compressors require increased costs. Summary of the Invention

[0003] Embodiments of this application provide a temperature detection method, a temperature control method and related equipment for a compressor, which can detect the temperature of the compressor without increasing costs.

[0004] In a first aspect of the embodiments of this application, a temperature detection method for a compressor is provided, which is applied to refrigeration equipment. The refrigeration equipment includes a compressor and an inverter disposed close to the compressor. The temperature detection method for the compressor includes:

[0005] Obtain the temperature of the inverter that drives the compressor;

[0006] Determine the temperature of the compressor according to the temperature of the inverter, where the temperature of the compressor is positively correlated with the temperature of the inverter.

[0007] In some embodiments, obtaining the temperature of the inverter that drives the compressor includes:

[0008] Utilize a temperature sensing module in the circuit of the inverter to obtain the temperature of the inverter module of the inverter.

[0009] In some embodiments, the temperature sensing module includes a thermistor; or,

[0010] The temperature sensing module includes a positive temperature coefficient voltage source and a negative temperature coefficient voltage source.

[0011] In some embodiments, the temperature of the inverter is linearly related to the temperature of the compressor.

[0012] In some embodiments, the inverter is installed on the surface of the compressor.

[0013] In a second aspect of the embodiments of this application, a temperature control method for a compressor is provided, including:

[0014] When the temperature of the compressor is greater than the first set threshold, reduce the rotation frequency of the compressor to lower the temperature of the compressor, where the temperature of the compressor is obtained according to the compressor temperature detection method described in the first aspect.

[0015] In some embodiments, reducing the rotation frequency of the compressor includes:

[0016] Reduce the duty cycle of the waveform of the drive current output by the frequency converter to reduce the rotation frequency of the compressor, where the drive current is used to drive the compressor to operate.

[0017] In some embodiments, reducing the duty cycle of the waveform of the drive current output by the frequency converter includes:

[0018] Control the on and off durations of the switching devices in the inverter module of the frequency converter to reduce the duty cycle of the drive current waveform.

[0019] In some embodiments, when the temperature of the compressor is greater than the first set threshold, reducing the rotation frequency of the compressor to lower the temperature of the compressor includes:

[0020] When the temperature of the compressor is greater than the first set threshold, reduce the rotation frequency of the compressor at a fixed speed to lower the temperature of the compressor.

[0021] In some embodiments, when the temperature of the compressor is greater than the first set threshold, reducing the rotation frequency of the compressor to lower the temperature of the compressor includes:

[0022] When the temperature of the compressor is greater than the first set threshold, reduce the rotation frequency of the compressor at a set acceleration to lower the temperature of the compressor.

[0023] In some embodiments, the compressor temperature control method further includes:

[0024] When the temperature of the compressor is less than or equal to the first set threshold, keep the operating frequency of the compressor unchanged.

[0025] In some embodiments, the compressor temperature control method further includes:

[0026] When the temperature of the compressor is greater than the second set threshold and the compressor is in an unstarted state, keep the unstarted state of the compressor, where the second set threshold is less than the first set threshold.

[0027] In some embodiments, the range of the first set threshold is 85°C - 100°C.

[0028] In a third aspect of the embodiments of the present application, a controller is provided, including:

[0029] A memory in which a computer program is stored;

[0030] A processor that, when executing the computer program, implements the temperature detection method of the compressor as described in the first aspect, and / or implements the temperature control method of the compressor as described in the second aspect.

[0031] In a fourth aspect of the embodiments of the present application, a refrigeration device is provided, including:

[0032] The controller as described in the third aspect;

[0033] An inverter electrically connected to the controller;

[0034] A compressor electrically connected to the inverter.

[0035] In some embodiments, the inverter includes a temperature sensing module;

[0036] The temperature sensing module includes a thermistor; or,

[0037] The temperature sensing module includes a positive temperature coefficient voltage source and a negative temperature coefficient voltage source.

[0038] The temperature detection method of the compressor provided by the embodiments of the present application detects the temperature of the inverter based on the positive correlation between the temperature of the compressor and the temperature of the inverter, and obtains the temperature of the compressor according to the temperature of the inverter, so as to realize the monitoring of the compressor temperature. The temperature detection method of the compressor provided by the embodiments of the present application does not require a separate temperature sensor for the compressor, which can avoid increasing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A temperature detection method of a compressor provided by an embodiment of the present application;

[0040] Figure 2 A schematic structural diagram of a temperature sensing module provided by an embodiment of the present application;

[0041] Figure 3 Another schematic structural diagram of a temperature sensing module provided by an embodiment of the present application;

[0042] Figure 4 A circuit schematic diagram of an inverter provided by an embodiment of the present application;

[0043] Figure 5 Schematic diagram of the temperature range of a compressor provided by an embodiment of the present application;

[0044] Figure 6 Schematic structural block diagram of a controller provided by an embodiment of the present application;

[0045] Figure 7 Schematic structural block diagram of a refrigeration device provided by an embodiment of the present application. Detailed implementation manners

[0046] To better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of this specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. Without conflict, the technical features in the embodiments of this specification and the embodiments can be combined with each other.

[0047] In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element. The term "more than two" includes two or more than two cases.

[0048] Currently, in refrigeration equipment, the compressor is a key core component. The compressor is a heat-generating body, and most of the heat is basically converted from electrical energy into mechanical energy, and then the mechanical energy is converted into heat energy. The heat will be distributed in the compressor compartment. In addition, the heat generated during the operation of the frequency converter will also affect the temperature of the compressor. If the temperature rise of the compressor is too high, it is easy to reduce the service life of the compressor and the reliability of the compressor. Therefore, the temperature monitoring of the compressor becomes particularly important. However, the existing temperature detection methods for compressors require additional costs.

[0049] In view of this, the embodiments of the present application provide a temperature detection method, a temperature control method and related equipment for a compressor, which can detect the temperature of the compressor without increasing costs.

[0050] In the first aspect of the embodiments of the present application, a method for detecting the temperature of a compressor is provided, which is applied to a refrigeration device. The refrigeration device includes a compressor and a frequency converter disposed close to the compressor. Figure 1 This is a method for detecting the temperature of a compressor provided by the embodiments of the present application. As Figure 1 shown, the method for detecting the temperature of a compressor provided by the embodiments of the present application includes:

[0051] S100: Obtain the temperature of the frequency converter that drives the compressor. The frequency converter can drive the operation of the compressor. The frequency converter can convert the fixed alternating current of the power supply voltage into direct current, and then convert the direct current into variable alternating current. The variable alternating current can be used to drive the operation of the compressor. The variable alternating current can control and adjust the rotation frequency of the compressor. The change in the rotation frequency of the compressor brings about a change in the rotation speed of the compressor, thereby achieving flexible driving of the compressor.

[0052] S200: Determine the temperature of the compressor according to the temperature of the frequency converter, where the temperature of the compressor is positively correlated with the temperature of the frequency converter.

[0053] It should be noted that in a refrigeration device, the compressor is the core component for refrigeration. If the temperature rise of the compressor is too high, it will cause the insulation of internal components to decrease, the viscosity of the compressor oil to drop, and the internal components to be easily worn, thereby greatly reducing the life and reliability of the compressor body. Therefore, the temperature monitoring of the compressor is particularly important. Exemplarily, the refrigeration device may include a refrigerator, a freezer, an air conditioner, an ice-making device, etc.

[0054] Taking a refrigerator as an example of a refrigeration device, the frequency converter is usually set on the electronic control board. Usually, the electronic control board is installed on the top and back of the refrigerator, and both of these positions will occupy the internal or external space of the refrigerator. On the one hand, the refrigerating or freezing space is reduced, and on the other hand, there is a risk of condensation. Therefore, at present, the electronic control board is set in the compressor compartment, and the frequency converter and the compressor are installed in an integrated structure, which can avoid the problem that the electronic control board occupies the refrigerating or freezing space of the refrigerator, and can also reduce the length of the power cord and the cost. The integrated design of the frequency converter and the compressor will bring a problem, that is, the compressor is a heat-generating body, and most of the heat is basically converted from electrical energy into mechanical energy, and the mechanical energy is converted into heat energy, and the heat will be distributed in the compressor compartment. The temperature of the compressor and the temperature of the frequency converter are closely related. In order to ensure that the temperature rise of the compressor does not exceed the standard, generally, the most severe working conditions are simulated through experiments. For example, in the forced continuous operation mode of the compressor, the low gear is limited, which affects the best refrigeration effect of the refrigerator. However, the actual refrigerator is in the forced continuous mode under non-severe working conditions, which will have a certain impact on the time for the refrigerator to pull down the temperature. The maximum temperature rise of the compressor is obtained through tests under the most severe working conditions in the development stage. In this way, in the forced continuous operation mode, for example, at a room temperature of 43 degrees Celsius, after continuous high-pressure operation and continuous low-pressure operation, the temperature of the compressor is collected, and the actual temperature is compared with the limit temperature. The existing monitoring of the compressor temperature usually requires setting a temperature sensor on the compressor, which will additionally increase the cost of the temperature sensor and thus increase the cost of the refrigeration device. During the energized operation of the frequency converter, heat will also be generated accordingly. The heat generated by the compressor and the heat generated by the frequency converter are mutually transferred and affected, so the temperatures of the frequency converter and the compressor set by the integrated structure are positively correlated.

[0055] In view of the above problems, the compressor temperature detection method provided by the embodiment of the present application is based on the integrated structure of the frequency converter and the compressor. The heat generated by the compressor and the heat generated by the frequency converter are mutually transferred and affected, and the compressor temperature and the frequency converter temperature are closely related. Based on the positive correlation between the compressor temperature and the frequency converter temperature, the temperature of the frequency converter is detected, and the compressor temperature is obtained according to the temperature of the frequency converter, so as to realize the monitoring of the compressor temperature. The compressor temperature detection method provided by the embodiment of the present application does not require a separate temperature sensor to be set on the compressor, which can avoid increasing the cost.

[0056] In some embodiments, the frequency converter is installed on the surface of the compressor. When the frequency converter is installed on the surface of the compressor and the frequency converter and the compressor are installed in an integrated structure, the temperature relationship between the frequency converter and the compressor can be positively correlated, and the temperature of the compressor can be reflected by detecting the temperature of the frequency converter.

[0057] In some embodiments, step S100 may include:

[0058] Utilize the temperature sensing module in the circuit of the frequency converter to obtain the temperature of the inverter module of the frequency converter. The circuit of the frequency converter includes an EMI (electromagnetic interference module), a rectifier module, and an inverter. The EMI can be used to shield external electromagnetic interference. The rectifier module can convert the fixed alternating current of the power supply into direct current. The inverter can convert the direct current into variable alternating current, and the variable alternating current can be used to drive the operation of the compressor, and the rotation frequency of the compressor can be adjusted by the variable alternating current.

[0059] In some embodiments, the temperature sensing module includes a thermistor. Or, the temperature sensing module includes a positive temperature coefficient voltage source and a negative temperature coefficient voltage source.

[0060] Exemplarily, Figure 2 The schematic structural diagram of a temperature sensing module provided by an embodiment of the present application. As Figure 2 shown, the temperature sensing module includes a first resistor R1, a thermistor RT2, a first diode D1, a second diode D2, a third resistor R3, and a first capacitor C1. After the first resistor R1 and the thermistor RT2 are connected in series, the other end of the first resistor R1 is connected to the high-level voltage VCC, and the other end of the thermistor RT2 is grounded. The model of the first diode D1 can be BAV99. The temperature sensing end MCU-IPM-Temp of the temperature sensing module can sense the voltage change, and the voltage change can reflect the resistance change of the thermistor RT2. The resistance change of the thermistor RT2 can reflect the temperature change, and then the temperature change of the frequency converter can be measured. R1 and RT2 form a voltage dividing circuit, D1 and D2 are used to clamp the sampling point voltage to prevent the central processing unit from being damaged due to overvoltage or negative voltage of the surge voltage. R3 and C1 form a filtering circuit. The resistance value of the thermistor RT2 is negatively correlated with the temperature. The higher the temperature, the smaller the resistance. The temperature signal is converted into an analog voltage signal through the principle of resistance voltage division, and the analog voltage signal is converted into a digital signal and transmitted to the central processing unit. The higher the temperature, the lower the resistance value of the thermistor RT2. The change in the resistance value of the thermistor RT2 causes the collected voltage value to change. Through the relationship between the collected voltage and the resistance value of the thermistor RT2: V MCU-IPM = RT2 / (R1 + RT2)×VCC, V MCU-IPM is the voltage value sensed by the temperature sensing end MCU-IPM-Temp. RT2, R1, and RT2 represent their respective resistance values in the formula. Then, according to the one-to-one correspondence mapping relationship between the voltage value and the temperature of the frequency converter, the temperature of the frequency converter can be obtained.

[0061] Exemplarily, Figure 3 The schematic structural diagram of another temperature sensing module provided by an embodiment of the present application. As Figure 3As shown, through a positive temperature coefficient voltage source and a negative temperature coefficient voltage source, weighted operations are performed. The result of the weighted operations correspondingly causes a change in current, and the change in current causes a change in voltage. The analog voltage signal is converted into a digital signal and then transmitted to the central processing unit. As Figure 3 shown, the voltage (unit: V) of the positive temperature coefficient voltage source is positively correlated with the temperature T (unit: °C), and the voltage (unit: V) of the negative temperature coefficient voltage source is negatively correlated with the temperature T (unit: °C). After the weighted operations of the positive temperature coefficient voltage source and the negative temperature coefficient voltage source, they are connected to the detection circuit, the Gm-V circuit. The Gm-V circuit can detect the induced current ITS current, and the current (unit: μA) is positively correlated with the temperature T (unit: °C).

[0062] The temperature detection method of the compressor provided by the embodiment of the present application utilizes the temperature sensing module in the circuit of the frequency converter, which can be a thermistor or a combination of a positive temperature coefficient voltage source and a negative temperature coefficient voltage source. There is no need to add a new temperature sensor, which can avoid increasing costs. In addition, the temperature value of the inverter can be accurately measured, improving the accuracy of the compressor temperature detection.

[0063] In some embodiments, the temperature of the frequency converter and the temperature of the compressor have a linear relationship. Exemplarily, the relationship formula between the compressor temperature and the frequency converter temperature is as shown in formula (1):

[0064] Tcomp = A × Tpower + B (1)

[0065] where A and B are constants, and Tpower is the temperature of the frequency converter. By collecting the temperature Tpower of the frequency converter, the temperature of the compressor can be obtained using formula (1).

[0066] In the second aspect of the embodiment of the present application, a temperature control method for a compressor is provided, including:

[0067] When the temperature of the compressor is greater than the first set threshold, the rotation frequency of the compressor is reduced to lower the temperature of the compressor. Herein, the temperature of the compressor is obtained according to the compressor temperature detection method described in the first aspect. If the temperature of the compressor exceeds the first set threshold, it is likely to affect the service life and reliability of the compressor body, so it is necessary to cool down the compressor. The temperature of the compressor can be indirectly controlled by controlling the temperature of the frequency converter. Set the compressor temperature limit threshold, that is, the first set threshold. After reaching the first set threshold, the frequency converter can adopt the frequency reduction means, that is, by adjusting the frequency converter to control the rotation frequency of the compressor to lower the temperature of the compressor. For example, adjusting the output power or drive current of the frequency converter to reduce the rotation power of the compressor, thereby reducing the temperature rise of the compressor. As the compressor temperature decreases, the insulation performance of the internal components of the compressor is improved, and the internal components will not be worn due to the reduction of the compressor oil viscosity, thereby improving the service life and reliability of the compressor body.

[0068] In some embodiments, reducing the rotation frequency of the compressor may include:

[0069] Reducing the duty cycle of the waveform of the drive current output by the frequency converter to reduce the rotation frequency of the compressor, wherein the drive current is used to drive the compressor to operate.

[0070] In some embodiments, reducing the duty cycle of the waveform of the drive current output by the frequency converter includes:

[0071] Controlling the on and off durations of the switching devices in the inverter module of the frequency converter to reduce the duty cycle of the drive current waveform.

[0072] Exemplarily, Figure 4 FIG. is a schematic circuit diagram of a frequency converter provided by an embodiment of the present application. As Figure 4As shown, the frequency converter includes an electromagnetic interference module EMI&SURGE, a rectification module, and an inverter. The rectification module includes four connected diodes. The electromagnetic interference module EMI&SURGE is used to access fixed alternating current AC. The rectification module converts the fixed alternating current into direct current, and the inverter converts the direct current into variable alternating current. The inverter includes an inverter control module IPM and a drive current waveform module. The drive current waveform module includes six transistors, respectively identified as T1, T2, T3, T4, T5, and T6, which are correspondingly connected to the three-phase power input terminals of the compressor motor Motor. The three-phase power input terminals are A, B, and C respectively. Exemplarily, when T1, T4, and T6 are turned on and T2, T3, and T5 are turned off, the waveform output of the drive current is a high level, then the compressor motor Motor runs. The on-time of T1, T4, and T6 can be controlled to control the duty cycle of the drive current waveform, thereby controlling the magnitude of the effective current value of the drive current, and further controlling the rotation frequency of the drive compressor. The larger the duty cycle of the drive current waveform, the larger the rotation frequency of the drive compressor. Increasing the duty cycle of the drive current waveform can perform a frequency increase control on the compressor; decreasing the duty cycle of the drive current waveform can perform a frequency decrease control on the compressor, thereby realizing the temperature control of the compressor.

[0073] In some embodiments, when the temperature of the compressor is greater than the first set threshold, reducing the rotation frequency of the compressor to reduce the temperature of the compressor may include:

[0074] When the temperature of the compressor is greater than the first set threshold, the rotation frequency of the compressor is reduced at a fixed speed to reduce the temperature of the compressor. Reducing the rotation frequency of the compressor at a fixed speed is a process of uniformly reducing the frequency of the compressor. For example, the frequency is reduced by a set frequency every set time. The set time can be 1 - 5 seconds, and the set frequency can be 1 - 10Hz.

[0075] Or,

[0076] When the temperature of the compressor is greater than the first set threshold, the rotation frequency of the compressor is reduced at a set acceleration to reduce the temperature of the compressor. Reducing the rotation frequency of the compressor at a set acceleration can be a process of accelerating the frequency reduction.

[0077] In some embodiments, the temperature control method of the compressor further includes:

[0078] When the temperature of the compressor is less than or equal to the first set threshold, the operating frequency of the compressor is kept unchanged. The temperature of the compressor being less than or equal to the first set threshold means that the temperature of the compressor is within a relatively safe range, and there is no need to perform temperature reduction control on the compressor.

[0079] In some embodiments, the temperature control method for a compressor provided by the embodiments of the present application further includes:

[0080] When the temperature of the compressor is greater than the second set threshold and the compressor is in an unstarted state, maintain the unstarted state of the compressor, where the second set threshold is less than the first set threshold. When the compressor is in an unstarted state and the temperature of the compressor exceeds the first set threshold, the temperature of the compressor cannot continue to rise. Therefore, it is not appropriate to start the compressor at this time, and it is necessary to control the compressor to maintain the unstarted state to facilitate more rapid cooling of the compressor.

[0081] Exemplarily, the range of the first set threshold can be 95°C - 100°C, and the range of the second set threshold is 82°C - 95°C.

[0082] Exemplarily, Figure 5 is a schematic diagram of the temperature range of a compressor provided by the embodiments of the present application. As Figure 5 shown, the first set threshold can be 85°C. When the temperature Tcomp of the compressor is greater than 85°C, it belongs to the frequency limit range. When the temperature of the compressor is in the frequency limit range, it is necessary to perform frequency reduction processing on the compressor to reduce the temperature of the compressor. When the temperature of the compressor is between 82°C and 85°C, the temperature of the compressor is in the holding range. When the temperature of the compressor is between 80°C and 82°C, the temperature of the compressor is in the normal range. When the temperature of the compressor is in the holding range and the normal range, there is no need to perform variable frequency control on the compressor, and the current operating state of the compressor can be maintained.

[0083] Exemplarily, when the temperature of the compressor is in the normal range, if the temperature is in an ascending state and is greater than or equal to 82°C, it becomes the holding range. If it continues to rise to be greater than 85°C, it becomes the frequency limit range. When in the frequency limit range, if the temperature drops and is lower than 82°C, it becomes the holding range. If it continues to drop to be less than 80°C, it becomes the normal range. When the temperature of the compressor is in the holding range, maintain the current operating frequency of the compressor unchanged. When the temperature of the compressor is in the frequency limit range, reduce the frequency by 4 Hz every 2 minutes from the current operating frequency until the frequency drops to 42 Hz and then stop reducing the frequency. Before the compressor starts, if the temperature is already in the holding range or the frequency limit range and the target frequency is 0, the compressor does not start.

[0084] In the third aspect of the embodiments of the present application, a controller is provided. Figure 6 is a schematic structural block diagram of a controller provided by the embodiments of the present application. As Figure 6 shown, the controller provided by the embodiments of the present application includes:

[0085] A memory 300, in which a computer program is stored;

[0086] The processor 400 is configured to implement the temperature detection method of the compressor as described in the first aspect and / or the temperature control method of the compressor as described in the second aspect when executing a computer program.

[0087] In a fourth aspect of the embodiments of the present application, a refrigeration device is provided. Figure 7 It is a schematic structural block diagram of a refrigeration device provided by the embodiments of the present application. As Figure 7 shown, the refrigeration device includes: the controller 500 as described in the third aspect; an inverter 600, where the inverter 600 is electrically connected to the controller 500; and a compressor 700, where the compressor 700 is electrically connected to the inverter 600.

[0088] For the refrigeration device provided by the embodiments of the present application, based on the positive correlation between the temperature of the compressor and the temperature of the inverter, the temperature of the inverter is detected, and the temperature of the compressor is obtained according to the temperature of the inverter, so as to realize the monitoring of the compressor temperature. For the temperature detection method of the compressor provided by the embodiments of the present application, there is no need to separately set a temperature sensor for the compressor, which can avoid increasing costs. By controlling the compressor temperature, the insulation performance of the internal components of the compressor is improved, and the internal components will not be worn due to the reduction of the compressor oil viscosity, thereby improving the life and reliability of the compressor body.

[0089] In some embodiments, the inverter includes a temperature sensing module; the temperature sensing module includes a thermistor; or, the temperature sensing module includes a positive temperature coefficient voltage source and a negative temperature coefficient voltage source.

[0090] It should be noted that in the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailedly described in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program codes.

[0092] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded computers, or other programmable data processing devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices generate means for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0093] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0095] Embodiments of the present application also provide a computer program product that includes computer software instructions. When the computer software instructions run on a processing device, the processing device is caused to execute the processes of the temperature detection method and / or the temperature control method of the compressor.

[0096] A computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, they generate, in whole or in part, a process or function in accordance with the embodiments of the present application. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from a website, a computer, a server, or a data center to another website, a computer, a server, or a data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

[0097] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein again.

[0098] In several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other may be indirect couplings or communication connections through some interfaces, devices, or units, and may be in electrical, mechanical, or other forms.

[0099] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] In addition, in each embodiment of the present application, each functional unit can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0101] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0102] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 recorded 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 each embodiment of the present application.

[0103] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0104] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these modifications and variations.

Claims

1. A temperature control method for a compressor, characterized in that, Applied to a refrigeration device, the refrigeration device includes a compressor and a frequency converter disposed near the compressor. The frequency converter is installed on the surface of the compressor. The frequency converter includes an electromagnetic interference module, a rectification module, and an inverter connected to each other. The inverter includes an inverter control module and a drive current waveform module. The drive current waveform module is connected to the motor of the compressor. The temperature detection method of the compressor includes: Obtaining the temperature of the frequency converter that drives the compressor; Determining the temperature of the compressor according to the temperature of the frequency converter, wherein the temperature of the frequency converter has a linear relationship with the temperature of the compressor; When the temperature of the compressor is greater than a first set threshold, reducing the rotation frequency of the compressor to reduce the temperature of the compressor; When the temperature of the compressor is greater than a second set threshold and the compressor is in an unstarted state, maintaining the unstarted state of the compressor, wherein the second set threshold is less than the first set threshold.

2. The temperature control method of the compressor according to claim 1, wherein, The obtaining the temperature of the frequency converter that drives the compressor includes: Using a temperature sensing module in the circuit of the frequency converter to obtain the temperature of the inverter module of the frequency converter.

3. The temperature control method of the compressor according to claim 2, characterized in that, The temperature sensing module includes a thermistor; or, The temperature sensing module includes a positive temperature coefficient voltage source and a negative temperature coefficient voltage source.

4. The temperature control method of the compressor according to claim 1, characterized in that The reducing the rotation frequency of the compressor includes: Reducing the duty cycle of the waveform of the drive current output by the frequency converter to reduce the rotation frequency of the compressor, wherein the drive current is used to drive the compressor to operate.

5. The temperature control method of the compressor according to claim 4, characterized in that, The reducing the duty cycle of the waveform of the drive current output by the frequency converter includes: Controlling the on and off durations of the switching devices in the inverter module of the frequency converter to reduce the duty cycle of the drive current waveform.

6. The temperature control method of the compressor according to claim 1, characterized in that, The when the temperature of the compressor is greater than the first set threshold, reducing the rotation frequency of the compressor to reduce the temperature of the compressor includes: When the temperature of the compressor is greater than the first set threshold, reducing the rotation frequency of the compressor at a fixed speed to reduce the temperature of the compressor.

7. The temperature control method of the compressor according to claim 1, characterized in that, The when the temperature of the compressor is greater than the first set threshold, reducing the rotation frequency of the compressor to reduce the temperature of the compressor includes: When the temperature of the compressor is greater than the first set threshold, reducing the rotation frequency of the compressor at a set acceleration to reduce the temperature of the compressor.

8. The temperature control method of the compressor according to claim 1, characterized in that, It further includes: When the temperature of the compressor is less than or equal to the first set threshold, maintaining the operation frequency of the compressor unchanged.

9. The temperature control method of the compressor according to claim 1, wherein, The range of the first set threshold is 85°C - 100°C.

10. A controller, characterized in that, It includes: A memory in which a computer program is stored; A processor that, when executing the computer program, implements the temperature control method of the compressor according to any one of claims 1 - 9.

11. A refrigeration device, characterized in that, It includes: A controller according to claim 10; A frequency converter electrically connected to the controller; A compressor electrically connected to the frequency converter.

12. The refrigeration device according to claim 11, characterized in that, The frequency converter includes a temperature sensing module; The temperature sensing module includes a thermistor; or, The temperature sensing module includes a positive temperature coefficient voltage source and a negative temperature coefficient voltage source.

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