CN111059038A - Temperature protection device and method for compressor, compressor system and refrigeration equipment - Google Patents
Temperature protection device and method for compressor, compressor system and refrigeration equipment Download PDFInfo
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- CN111059038A CN111059038A CN201811202389.2A CN201811202389A CN111059038A CN 111059038 A CN111059038 A CN 111059038A CN 201811202389 A CN201811202389 A CN 201811202389A CN 111059038 A CN111059038 A CN 111059038A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
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Abstract
The invention provides a temperature protection device and method for a compressor, a compressor system and refrigeration equipment, wherein the device comprises: the temperature detection module is used for detecting the temperature of the compressor; the hardware protection module is connected with the temperature detection module and is used for generating a hardware protection signal according to the temperature of the compressor; the control module is connected with the temperature detection module and is used for generating a software protection signal according to the temperature of the compressor; and the driving module is respectively connected with the compressor, the hardware protection module and the control module, and controls the compressor to stop running according to the hardware protection signal and/or the software protection signal. The temperature protection device of the compressor of the embodiment of the invention avoids the impact of a direct power-off source on the compressor by adopting a hardware and software two-stage temperature protection mechanism, has the advantages of rapid hardware protection action and flexible software protection control, and enhances the protection reliability.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a temperature protection device and method for a compressor, a compressor system and refrigeration equipment.
Background
Currently, refrigeration equipment such as freezers are becoming more and more prevalent in the market. As a main part of the refrigeration cycle system, the inverter compressor has a high requirement on safety. When the inverter compressor is operated, the temperature of the inverter compressor rises due to heat generated by parts such as an internal motor. However, if the temperature rises to a certain degree, the compressor parts and the insulating material are damaged, and the refrigeration system is also adversely affected.
The over-temperature protection scheme of the inverter compressor in the related art mainly comprises the following two schemes:
one is to connect a thermal protector in series in the input AC power circuit and place the thermal protector on the compressor shell, when the temperature is too high, the thermal protector acts to force the frequency conversion compressor to cut off the power. However, the related art has problems in that temperature monitoring cannot be achieved, and direct cutting off of an input power may cause impact on the inverter compressor, which may affect product reliability.
And the other method is that a thermistor is used for collecting the shell temperature of the variable-frequency compressor, a temperature signal is transmitted to the main control chip through the conversion of a corresponding circuit of the variable-frequency control board, and the temperature is monitored and protected by software. However, the related art has problems in that the software protection operation time is slow, and when the software program is abnormal, the protection operation cannot be performed on the inverter compressor any more.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a temperature protection device for a compressor, so as to implement a two-stage temperature protection mechanism for hardware and software of the compressor, thereby enhancing the protection reliability.
A second object of the present invention is to propose a compressor system.
A third object of the invention is to propose a refrigeration device.
A fourth object of the present invention is to provide a temperature protection method for a compressor.
In order to achieve the above object, a first embodiment of the present invention provides a temperature protection device for a compressor, including: the temperature detection module is used for detecting the temperature of the compressor; the hardware protection module is connected with the temperature detection module and is used for generating a hardware protection signal according to the temperature of the compressor; the control module is connected with the temperature detection module and is used for generating a software protection signal according to the temperature of the compressor; and the driving module is respectively connected with the compressor, the hardware protection module and the control module, and controls the compressor to stop running according to the hardware protection signal and/or the software protection signal.
According to the temperature protection device for the compressor, provided by the embodiment of the invention, after the temperature detection module detects the temperature of the compressor, the hardware protection module generates a hardware protection signal according to the temperature of the compressor, the control module generates a software protection signal according to the temperature of the compressor, and then the driving module controls the compressor to stop running according to the hardware protection signal and/or the software protection signal. Therefore, the temperature protection device of the compressor provided by the embodiment of the invention has the advantages of rapid hardware protection action and flexible software protection control by adopting a hardware and software two-stage temperature protection mechanism, and the protection reliability is enhanced. And the driving module controls the compressor to stop running, so that the impact of a direct power-off source on the compressor is avoided, and the improvement of the system reliability is facilitated.
According to an embodiment of the present invention, the hardware protection module is further configured to generate the hardware protection signal when the temperature according to the compressor is greater than a hardware protection value; the control module is further configured to generate the software protection signal based on the temperature of the compressor being greater than a software protection value.
According to one embodiment of the invention, the temperature detection module comprises: a temperature sensor for sensing a temperature of the compressor; the temperature acquisition circuit, the input of temperature acquisition circuit with temperature sensor links to each other, the output of temperature acquisition circuit with control module with the hardware protection module links to each other, the temperature acquisition circuit will temperature sensor senses the temperature of compressor converts voltage signal to, and will voltage signal output extremely control module with the hardware protection module.
According to an embodiment of the invention, the temperature sensor includes a thermistor, and the temperature acquisition circuit includes a first resistor, wherein one end of the first resistor is connected to a preset power supply, the other end of the first resistor is connected to one end of the thermistor and has a first node, the other end of the thermistor is grounded, and the first node is respectively connected to the control module and the hardware protection module.
According to an embodiment of the present invention, the temperature acquisition circuit further includes a second resistor and a first capacitor, wherein the first node is respectively connected to the control module and the hardware protection module through the second resistor, a second node is provided between the second resistor and the control module and between the second resistor and the hardware protection module, one end of the first capacitor is connected to the second node, and the other end of the first capacitor is grounded.
According to one embodiment of the invention, the hardware protection module comprises: a reference voltage providing unit for providing a reference voltage, wherein the reference voltage is determined according to the hardware protection value; and the first input end of the comparator is connected with the temperature acquisition module, the second input end of the comparator is connected with the reference voltage supply unit, and the output end of the comparator is connected with the driving module.
According to an embodiment of the invention, the hardware protection module further comprises: the third resistor is connected between the output end of the comparator and the driving module, and a third node is arranged between the third resistor and the driving module; and one end of the second capacitor is connected with the third node, and the other end of the second capacitor is grounded.
In order to achieve the above object, a second aspect of the present invention provides a compressor system, including the temperature protection device of the compressor.
According to the compressor system provided by the embodiment of the invention, the two-stage temperature protection mechanism of hardware and software of the compressor can be realized through the temperature protection device of the compressor, so that the impact of a direct power-off power source on the compressor is avoided, the advantages of rapid hardware protection action and flexible software protection control are achieved, and the protection reliability is enhanced.
To achieve the above object, a refrigeration device according to a third embodiment of the present invention includes the compressor system.
According to the refrigeration equipment provided by the embodiment of the invention, a two-stage temperature protection mechanism for hardware and software of the compressor can be realized through the compressor system, so that the impact of a direct power-off source on the compressor is avoided, the advantages of rapid hardware protection action and flexible software protection control are achieved, and the protection reliability is enhanced.
In order to achieve the above object, a fourth aspect of the present invention provides a temperature protection method for a compressor, including: detecting a temperature of the compressor; the hardware protection module generates a hardware protection signal according to the temperature of the compressor; the control module generates a software protection signal according to the temperature of the compressor; and the driving module controls the compressor to stop running according to the hardware protection signal and/or the software protection signal.
According to the temperature protection method of the compressor provided by the embodiment of the invention, after the temperature of the compressor is detected, the hardware protection module generates a hardware protection signal according to the temperature of the compressor, the control module generates a software protection signal according to the temperature of the compressor, and the driving module controls the compressor to stop running according to the hardware protection signal and/or the software protection signal. Therefore, the temperature protection method of the compressor in the embodiment of the invention avoids the impact of a direct power-off source on the compressor by adopting a hardware and software two-stage temperature protection mechanism, has the advantages of rapid hardware protection action and flexible software protection control, and enhances the protection reliability.
According to an embodiment of the present invention, the generating the hardware protection signal according to the temperature of the compressor by the hardware protection module includes: generating the hardware protection signal when the temperature according to the compressor is greater than a hardware protection value; the control module generating a software protection signal according to the temperature of the compressor comprises: and generating the software protection signal when the temperature of the compressor is greater than a software protection value.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block schematic diagram of a temperature protection device of a compressor according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a temperature sensing module of a temperature protection apparatus for a compressor according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a hardware protection module of a temperature protection apparatus for a compressor according to one embodiment of the present invention;
fig. 4 is a flowchart illustrating a temperature protection method of a compressor according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A temperature protection apparatus and a protection method of a compressor, a compressor system, and a refrigeration apparatus according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a block diagram schematically illustrating a temperature protection apparatus of a compressor according to an embodiment of the present invention. As shown in fig. 1, the temperature protection apparatus of a compressor according to an embodiment of the present invention includes: the system comprises a temperature detection module 10, a hardware protection module 20, a control module 30 and a drive module 40.
The temperature detection module 10 is configured to detect a temperature of the compressor 50; the hardware protection module 20 is connected to the temperature detection module 10, and the hardware protection module 20 is configured to generate a hardware protection signal according to the temperature of the compressor 50; the control module 30 is connected with the temperature detection module 10, and the control module 30 is used for generating a software protection signal according to the temperature of the compressor 50; the driving module 40 is connected to the compressor 50, the hardware protection module 20 and the control module 30, respectively, and the driving module 40 controls the compressor 50 to stop operating according to the hardware protection signal and/or the software protection signal.
Specifically, according to an embodiment of the present invention, the hardware protection module 20 is further configured to generate a hardware protection signal when the temperature according to the compressor 50 is greater than the hardware protection value; the control module 30 is further configured to generate a software protection signal based on the temperature of the compressor 50 being greater than a software protection value.
It should be noted that the control module 30 may store a software protection value in advance, and the software protection value may be set by a software program. And the hardware protection value may be set by the hardware circuit of the hardware protection module 20.
In an embodiment of the present invention, the temperature detection module 10 may output the detected temperature of the compressor 50 to the hardware protection module 20 and the control module 30 at the same time. The control module 30 compares the temperature of the compressor 50 with the software protection value after receiving the temperature of the compressor 50, and sends a software protection signal to the driving module 40 to control the compressor 50 to stop running if the temperature of the compressor 50 exceeds the software protection value, thereby implementing software over-temperature protection. After receiving the temperature of the compressor 50, the hardware protection module 20 compares the temperature of the compressor 50 with a hardware protection value, and if the temperature of the compressor 50 exceeds the hardware protection value, directly sends a hardware protection signal to the driving module 40 to control the compressor 10 to stop running, thereby implementing hardware over-temperature protection. That is, the driving module 40 controls the compressor 10 to stop when receiving the software protection signal or the hardware protection signal or both the software protection signal and the hardware protection signal. If the temperature of the compressor 50 does not exceed the software protection value, the control module 30 does not send the software protection signal to the driving module 40. If the temperature of the compressor 50 does not exceed the hardware protection value, the hardware protection module 20 does not send the hardware protection signal to the driving module 40. The driving module 40 controls the compressor 50 to maintain a normal operation state when the software protection signal is not received and the hardware protection signal is not received.
According to an embodiment of the present invention, as shown in fig. 2, the temperature detection module 10 includes: a temperature sensor 11 and a temperature acquisition circuit 12. Wherein, the temperature sensor 11 is used for sensing the temperature of the compressor 50; the input end of the temperature acquisition circuit 12 is connected to the temperature sensor 11, the output end of the temperature acquisition circuit 12 is connected to the control module 30 and the hardware protection module 20, the temperature acquisition circuit 12 converts the temperature of the compressor 50 sensed by the temperature sensor 11 into a voltage signal U1, and outputs the voltage signal U1 to the control module 30 and the hardware protection module 20.
The temperature sensor 11 may be disposed in a terminal box of the compressor 50 and attached to a housing of the compressor 50 for sensing a temperature of the compressor 50, such as a shell temperature. The outgoing line of the temperature sensor 11 is connected with the temperature acquisition circuit 12 through a connector.
Further, according to an embodiment of the present invention, as shown in fig. 2, the temperature sensor 11 includes a thermistor Rt. The temperature collecting circuit 12 includes a first resistor R1, wherein one end of the first resistor R1 is connected to a preset power supply, the other end of the first resistor R1 is connected to one end of the thermistor Rt and has a first node J1, the other end of the thermistor Rt is grounded, and the first node J1 is respectively connected to the control module 30 and the hardware protection module 20. Wherein, the preset power supply can be a direct current 5V power supply.
Furthermore, as shown in fig. 2, the temperature acquisition circuit 12 further includes a second resistor R2 and a first capacitor C1, wherein the first node J1 is connected to the control module 30 and the hardware protection module 20 through the second resistor R2, respectively, a second node J2 is provided between the second resistor R2 and the control module 30 and the hardware protection module 20, one end of the first capacitor C1 is connected to the second node J2, and the other end of the first capacitor C1 is grounded. Thus, the voltage signal is buffer-filtered by the second resistor R2 and the first capacitor C1.
The thermistor Rt can sense the temperature of the compressor 50 and present a corresponding resistance value due to different resistance values corresponding to different temperatures, and then the temperature acquisition circuit 12 converts the different resistance values of the thermistor Rt into corresponding different voltage signals and outputs the corresponding voltage signals U1 to the control module 30 and the hardware protection module 20.
Specifically, the first resistor R1 and the thermistor Rt form a voltage dividing circuit, the voltage at the first node J1 is the voltage divided by the first resistor R1 and the thermistor Rt, that is, the voltage at the thermistor Rt, and the voltage is filtered by the RC filter circuit formed by the second resistor R2 and the first capacitor C1 and then output to the control module 30 and the hardware protection module 20 through the second node J2, thereby realizing real-time acquisition of the temperature of the compressor 50.
Note that the type of the thermistor Rt may be selected from a PTC resistor with a positive temperature coefficient or an NTC resistor with a negative temperature coefficient. The software program of the temperature acquisition circuit 12 and/or the control module 30 may be appropriately adjusted according to the type of the thermistor Rt, for example, one end of the thermistor Rt is connected to a preset power supply, the other end of the thermistor Rt is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded.
Referring to the example of fig. 2, when the thermistor Rt selects the PTC resistor, the resistance of the thermistor Rt increases with the increase of the temperature, and thus the voltage signal output by the temperature acquisition circuit 12 also increases with the increase of the temperature, and the control module 30 may determine that the temperature of the compressor 50 exceeds the software protection value when the voltage signal output by the temperature acquisition circuit 12 exceeds a certain value. When the NTC resistor is selected as the thermistor Rt, the resistance of the thermistor Rt decreases with the increase of the temperature, and further the voltage signal output by the temperature acquisition circuit 12 decreases with the increase of the temperature, and the control module 30 may determine that the temperature of the compressor 50 exceeds the software protection value when the voltage signal output by the temperature acquisition circuit 12 is lower than a certain value.
Further, according to an embodiment of the present invention, as shown in fig. 3, the hardware protection module 20 includes: a reference voltage providing unit 21 and a comparator 22. The reference voltage providing unit 21 is configured to provide a reference voltage, where the reference voltage is determined according to a hardware protection value; a first input terminal of the comparator 22 is connected to the temperature acquisition module 10, a second input terminal of the comparator 22 is connected to the reference voltage providing unit 21, and an output terminal of the comparator 22 is connected to the driving module 40.
Further, as shown in fig. 3, the hardware protection module 20 further includes: the driving circuit comprises a third resistor R3 and a second capacitor C2, wherein the third resistor R3 is connected between the output end of the comparator 22 and the driving module 40, a third node J3 is arranged between the third resistor R3 and the driving module 40, one end of the second capacitor C2 is connected with the third node J3, and the other end of the second capacitor C2 is grounded.
Specifically, the reference voltage providing unit 21 includes: a fourth resistor R4 and a fifth resistor R5. One end of the fourth resistor R4 is connected to a preset power supply, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is grounded, a fourth node J4 is arranged between the other end of the fourth resistor R4 and one end of the fifth resistor R5, and the fourth node J4 is connected to the second input end of the comparator 22. The voltage at the fourth node J4 is divided by the fourth resistor R4 and the fifth resistor R5, i.e., the voltage across the fifth resistor R5. Wherein R3 and C2 form a buffer filter circuit of the hardware protection signal.
That is, the reference voltage Uref supplied by the reference voltage supply unit 21 is the voltage across the fifth resistor R5. The voltage signal U1 output by the temperature acquisition module 10 and the reference voltage Uref are compared by the comparator 22, and the obtained comparison result is filtered by the filter circuit formed by the third resistor R3 and the second capacitor C2 and then output to the driving module 40 through the third node J3. When the voltage signal U1 output by the temperature acquisition module 10 exceeds the reference voltage Uref, the level state of the hardware protection signal output by the comparator 22 will change.
The first input terminal of the comparator 22 is a negative input terminal, the second input terminal is a positive input terminal, and the thermistor Rt selects the PTC resistor. When the temperature of the compressor 50 is greater than the hardware protection value, the voltage signal U1 is also correspondingly greater than the reference voltage Uref, the comparator 22 outputs a low level signal, the hardware protection module 20 outputs the low level signal generated at this time, which is the hardware protection signal, to the driving module 40, and then the driving module 40 controls the compressor 50 to stop operating according to the low level signal, and meanwhile, the hardware protection module simultaneously sends the hardware protection signal to the main control module, so that the main control module can execute other control strategies. When the temperature of the compressor 50 is lower than the hardware protection value, the voltage signal U1 is correspondingly lower than the reference voltage Uref, the comparator 22 outputs a high level signal, which is not a hardware protection signal, and at this time, if the control module 30 does not generate a software protection signal at the same time, the driving module 40 controls the compressor 50 to continue to maintain the normal operation state.
In addition, the voltage signal U1 output by the temperature acquisition module 10 is also output to the control module 30, the control module 30 generates a software protection signal according to the voltage signal U1, that is, when the temperature of the compressor 50 is greater than a preset software protection value, that is, the voltage signal U1 is greater than the software reference voltage Uref1, the control module 30 generates the software protection signal according to the temperature of the compressor 50 at this time, the driving module 40 controls the compressor 50 to stop operating according to the software protection signal, and when the temperature of the compressor 50 is less than the software protection value, that is, the voltage signal U1 is less than the software reference voltage Uref1, the control module 30 does not generate the software protection signal, and at this time, if the hardware protection module 20 does not generate the hardware protection signal at the same time, the driving module 40 controls the compressor 50 to continue to.
It should be noted that the hardware protection value and the software protection value may be set to be the same temperature value, for example, the temperature upper limit value of the compressor 50, and then the temperature value is converted into a corresponding voltage signal according to the conversion relationship of the temperature detection module 10, and the voltage signal is used as the reference voltage Uref of the hardware protection module 20 and the software reference voltage Uref1 of the control module 30. Therefore, the voltage signal U1 output by the temperature detection module 10 is compared with Uref and Uref1, and a two-stage temperature protection mechanism for software and hardware of the compressor 50 is realized.
In summary, according to the temperature protection device for the compressor of the embodiment of the present invention, after the temperature detection module detects the temperature of the compressor, the hardware protection module generates the hardware protection signal according to the temperature of the compressor, the control module generates the software protection signal according to the temperature of the compressor, and then the driving module controls the compressor to stop operating according to the hardware protection signal and/or the software protection signal. Therefore, the temperature protection device of the compressor provided by the embodiment of the invention has the advantages of rapid hardware protection action and flexible software protection control by adopting a hardware and software two-stage temperature protection mechanism, and the protection reliability is enhanced. And the driving module controls the compressor to stop running, so that the impact of a direct power-off source on the compressor is avoided, and the improvement of the system reliability is facilitated.
Based on the temperature protection device of the compressor in the embodiment, the embodiment of the invention also provides a compressor system. The compressor system comprises the temperature protection device of the compressor.
In summary, according to the compressor system of the embodiment of the present invention, the two-stage temperature protection mechanism for hardware and software of the compressor can be realized by the temperature protection device of the compressor, and the compressor system has the advantages of rapid hardware protection action and flexible software protection control, and the protection reliability is enhanced. And the driving module controls the compressor to stop running, so that the impact of a direct power-off source on the compressor is avoided, and the improvement of the system reliability is facilitated.
Based on the temperature protection device of the compressor and the compressor system in the embodiment, the embodiment of the invention also provides refrigeration equipment comprising the compressor system.
By way of example, the refrigeration equipment in the embodiment of the invention can be a variable-frequency refrigeration and freezing box, the variable-frequency refrigeration and freezing box can realize a two-stage temperature protection mechanism for hardware and software of a compressor through a set compressor system, and has the advantages of rapid hardware protection action and flexible software protection and control, and the protection reliability is enhanced. And the driving module controls the compressor to stop running, so that the impact of a direct power-off source on the compressor is avoided, and the improvement of the system reliability is facilitated.
Corresponding to the temperature protection device of the compressor in the embodiment, the invention also provides a temperature protection method of the compressor.
Fig. 4 is a flowchart illustrating a temperature protection method of a compressor according to an embodiment of the present invention. As shown in fig. 4, the temperature protection method of the compressor includes the steps of:
s1, detecting the temperature of the compressor;
s2, the hardware protection module generates a hardware protection signal according to the temperature of the compressor;
wherein, the hardware protection module generates the hardware protection signal according to the temperature of the compressor and includes: and generating a hardware protection signal when the temperature of the compressor is greater than the hardware protection value.
S3, the control module generates a software protection signal according to the temperature of the compressor;
wherein, the control module generates the software protection signal according to the temperature of the compressor and comprises: and generating a software protection signal when the temperature of the compressor is greater than the software protection value.
And S4, the driving module controls the compressor to stop running according to the hardware protection signal and/or the software protection signal.
It should be noted that the foregoing explanation of the embodiment of the temperature protection device for a compressor is also applicable to the temperature protection method for a compressor of this embodiment, and is not repeated here.
In summary, according to the temperature protection method for the compressor of the embodiment of the present invention, first, the temperature of the compressor is detected, then the hardware protection module generates the hardware protection signal according to the temperature of the compressor, the control module generates the software protection signal according to the temperature of the compressor, and finally the driving module controls the compressor to stop operating according to the hardware protection signal and/or the software protection signal. Therefore, the temperature protection method of the compressor provided by the embodiment of the invention has the advantages of rapid hardware protection action and flexible software protection control by adopting a hardware and software two-stage temperature protection mechanism, and the protection reliability is enhanced. And the driving module controls the compressor to stop running, so that the impact of a direct power-off source on the compressor is avoided, and the improvement of the system reliability is facilitated.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A temperature protection device for a compressor, comprising:
the temperature detection module is used for detecting the temperature of the compressor;
the hardware protection module is connected with the temperature detection module and is used for generating a hardware protection signal according to the temperature of the compressor;
the control module is connected with the temperature detection module and is used for generating a software protection signal according to the temperature of the compressor;
and the driving module is respectively connected with the compressor, the hardware protection module and the control module, and controls the compressor to stop running according to the hardware protection signal and/or the software protection signal.
2. The temperature protection apparatus of a compressor according to claim 1,
the hardware protection module is further used for generating the hardware protection signal when the temperature of the compressor is larger than a hardware protection value;
the control module is further configured to generate the software protection signal based on the temperature of the compressor being greater than a software protection value.
3. The temperature protection apparatus of a compressor according to claim 1, wherein the temperature detection module comprises:
a temperature sensor for sensing a temperature of the compressor;
the temperature acquisition circuit, the input of temperature acquisition circuit with temperature sensor links to each other, the output of temperature acquisition circuit with control module with the hardware protection module links to each other, the temperature acquisition circuit will temperature sensor senses the temperature of compressor converts voltage signal to, and will voltage signal output extremely control module with the hardware protection module.
4. The temperature protection device of a compressor according to claim 3, wherein the temperature sensor comprises a thermistor, and the temperature acquisition circuit comprises a first resistor, wherein one end of the first resistor is connected to a predetermined power supply, the other end of the first resistor is connected to one end of the thermistor and has a first node, the other end of the thermistor is grounded, and the first node is respectively connected to the control module and the hardware protection module.
5. The temperature protection device of a compressor according to claim 4, wherein the temperature acquisition circuit further comprises a second resistor and a first capacitor, wherein the first node is connected to the control module and the hardware protection module through the second resistor, respectively, a second node is provided between the second resistor and the control module and between the second resistor and the hardware protection module, one end of the first capacitor is connected to the second node, and the other end of the first capacitor is grounded.
6. The temperature protection device of a compressor according to claim 2, wherein the hardware protection module comprises:
a reference voltage providing unit for providing a reference voltage, wherein the reference voltage is determined according to the hardware protection value;
and the first input end of the comparator is connected with the temperature acquisition module, the second input end of the comparator is connected with the reference voltage supply unit, and the output end of the comparator is connected with the driving module.
7. The temperature protection device of a compressor of claim 6, wherein the hardware protection module further comprises:
the third resistor is connected between the output end of the comparator and the driving module, and a third node is arranged between the third resistor and the driving module;
and one end of the second capacitor is connected with the third node, and the other end of the second capacitor is grounded.
8. A compressor system, characterized in that it comprises a temperature protection device of a compressor according to any one of claims 1 to 7.
9. Refrigeration device, characterized in that it comprises a compressor system according to claim 8.
10. A method of protecting a temperature of a compressor, comprising the steps of:
detecting a temperature of the compressor;
the hardware protection module generates a hardware protection signal according to the temperature of the compressor;
the control module generates a software protection signal according to the temperature of the compressor;
and the driving module controls the compressor to stop running according to the hardware protection signal and/or the software protection signal.
11. The temperature protection method of a compressor according to claim 10,
the hardware protection module generating a hardware protection signal according to the temperature of the compressor comprises: generating the hardware protection signal when the temperature according to the compressor is greater than a hardware protection value;
the control module generating a software protection signal according to the temperature of the compressor comprises: and generating the software protection signal when the temperature of the compressor is greater than a software protection value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202389.2A CN111059038A (en) | 2018-10-16 | 2018-10-16 | Temperature protection device and method for compressor, compressor system and refrigeration equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811202389.2A CN111059038A (en) | 2018-10-16 | 2018-10-16 | Temperature protection device and method for compressor, compressor system and refrigeration equipment |
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| CN111059038A true CN111059038A (en) | 2020-04-24 |
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| CN201811202389.2A Pending CN111059038A (en) | 2018-10-16 | 2018-10-16 | Temperature protection device and method for compressor, compressor system and refrigeration equipment |
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Application publication date: 20200424 |