CN210111598U - Compressor protection circuit, compressor and air conditioner - Google Patents
Compressor protection circuit, compressor and air conditioner Download PDFInfo
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- CN210111598U CN210111598U CN201921187769.3U CN201921187769U CN210111598U CN 210111598 U CN210111598 U CN 210111598U CN 201921187769 U CN201921187769 U CN 201921187769U CN 210111598 U CN210111598 U CN 210111598U
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Abstract
The utility model relates to a compressor protection circuit, compressor and air conditioner, this protection circuit includes: the starting protection circuit is connected with the compressor controller and used for inhibiting surge current at the moment of starting the compressor; and/or the temperature protection circuit is used for detecting the real-time temperature of the environment where the compressor controller is located and adjusting the temperature of the compressor controller according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation. The utility model provides a technical scheme through starting protection circuit, and/or temperature protection circuit, has improved compressor controller's performance, has prolonged compressor controller's life, has guaranteed the long-term reliable operation of compressor.
Description
Technical Field
The utility model relates to a compressor technical field, concretely relates to compressor protection circuit, compressor and air conditioner.
Background
The variable frequency compressor can produce great surge current due to voltage sudden change when being electrified and started, and the inside components and parts of compressor controller can be impacted by heavy current, thereby influencing the overall EMI performance and even causing interference to other household appliances. And when the compressor runs under a severe working condition for a long time, the temperature can rise rapidly, and the performance of the power module in the controller can be influenced by high temperature.
SUMMERY OF THE UTILITY MODEL
For overcoming the problem that exists in the correlation technique to a certain extent at least, the utility model provides a compressor protection circuit, compressor and air conditioner to the surge current who produces when solving among the prior art compressor start, and/or, the long-time high temperature work of compressor can influence the problem of compressor performance.
According to the utility model discloses an aspect provides a compressor protection circuit, include:
the starting protection circuit is connected with the compressor controller and used for inhibiting surge current at the moment of starting the compressor; and/or the presence of a gas in the gas,
the temperature protection circuit is used for detecting the real-time temperature of the environment where the compressor controller is located and adjusting the temperature of the compressor controller according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
Preferably, the start-up protection circuit includes:
the energy storage device is connected with the compressor controller;
the first loop is used for guiding power supply current to the energy storage device at the moment of electrifying the compressor;
a second loop for diverting supply current to a load under control of the amount of power stored by the energy storage device.
Preferably, a current-limiting impedance is arranged on the first loop;
a power switch is arranged on the second loop and is connected with a load;
the power switch is connected in parallel at two ends of the current-limiting impedance, and a control end of the power switch is connected with the energy storage device; the impedance of the power switch is less than the current limiting impedance.
Preferably, the start-up protection circuit further includes:
a voltage feedback circuit connected between the energy storage device and the control terminal of the power switch;
and the voltage feedback circuit is used for controlling the power switch to be switched on when the voltage stored by the energy storage device reaches the breakover voltage of the power switch.
Preferably, the temperature protection circuit includes:
the temperature sensor is used for detecting the real-time temperature of the environment where the compressor controller is located and sending the real-time temperature to the compressor controller;
and the compressor controller is specifically used for controlling the rotating speed of the compressor according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
Preferably, the compressor controller is specifically configured to reduce the rotation speed of the compressor when the real-time temperature is higher than a critical upper limit temperature of normal operation of the compressor controller, so that the temperature of the compressor controller is kept below the critical upper limit temperature of normal operation.
Preferably, the temperature protection circuit further includes:
a bypass valve connected between the compressor controller and the compressor;
and the compressor controller is also used for controlling the suction volume of the refrigerant of the compressor by adjusting the bypass valve according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
Preferably, the compressor controller is specifically configured to increase a refrigerant suction amount of the compressor by adjusting the bypass valve when the real-time temperature is higher than a critical upper limit temperature of normal operation of the compressor controller, so that the temperature of the compressor controller is reduced to below the critical upper limit temperature of normal operation.
Preferably, the temperature protection circuit further includes:
and the analog-to-digital converter is connected between the temperature sensor and the compressor controller and is used for converting the temperature analog signal acquired by the temperature sensor into a temperature digital signal.
Preferably, the energy storage device is an energy storage capacitor.
According to a second aspect of the embodiments of the present invention, there is provided a compressor, comprising:
the compressor protection circuit is described above.
According to a third aspect of the embodiments of the present invention, there is provided an air conditioner, comprising:
the compressor described above.
The embodiment of the utility model provides a technical scheme can include following beneficial effect:
the starting protection circuit can inhibit surge current at the moment of starting the compressor, so that the long-term reliable operation of the compressor controller is ensured, the electromagnetic interference performance of the compressor controller is improved, and the service life of components is prolonged;
the temperature protection circuit can detect the real-time temperature of the environment where the compressor controller is located, and adjust the temperature of the compressor controller according to the real-time temperature, so that the temperature of the compressor controller is kept below the critical upper limit temperature of normal operation, the working environment of the compressor controller is optimized, and the performance of the compressor controller is improved;
the utility model provides a technical scheme through starting protection circuit, and/or temperature protection circuit, has improved compressor controller's performance, has prolonged compressor controller's life, has guaranteed the long-term reliable operation of compressor.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic block diagram illustrating a compressor protection circuit according to an exemplary embodiment;
fig. 2 is a schematic block diagram illustrating a compressor protection circuit according to another exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a schematic block diagram illustrating a compressor protection circuit according to an exemplary embodiment, the circuit, as shown in fig. 1, including:
the starting protection circuit 1 is connected with the compressor controller and used for inhibiting surge current at the moment of starting the compressor; and/or the presence of a gas in the gas,
and the temperature protection circuit 2 is used for detecting the real-time temperature of the environment where the compressor controller is located, and adjusting the temperature of the compressor controller according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
It can be understood that the protection circuit for a compressor provided in this embodiment may only have a start protection circuit, may only have a temperature protection circuit, and may also have both a start protection circuit and a temperature protection circuit. The configuration can be specifically carried out according to the requirements of users and the working environment of the compressor.
It will be understood that inrush current refers to the peak current flowing into the power supply device at the instant the power supply is turned on. The surge current has a significant influence on the safety of the power supply network and the consumers. Therefore, the technical scheme provided by the embodiment has great significance in guaranteeing safe operation of the compressor by setting the starting protection circuit to inhibit the surge current at the moment of starting the compressor.
It can be understood that the real-time temperature of the environment where the compressor controller is located is equivalent to the temperature of the compressor controller, and whether the temperature of the compressor controller is too high or not can be known by detecting the real-time temperature of the environment where the compressor controller is located, if so, the temperature is adjusted through the temperature protection circuit so as to avoid the performance of the internal power module of the compressor controller from being influenced by the too high temperature.
The starting protection circuit can inhibit surge current at the moment of starting the compressor, so that the compressor controller can operate reliably for a long time, the electromagnetic interference performance of the compressor controller is improved, and the service life of components is prolonged;
the temperature protection circuit can detect the real-time temperature of the environment where the compressor controller is located, and adjust the temperature of the compressor controller according to the real-time temperature, so that the temperature of the compressor controller is kept below the critical upper limit temperature of normal operation, the working environment of the compressor controller is optimized, and the performance of the compressor controller is improved;
according to the technical scheme provided by the embodiment, the performance of the compressor controller is improved, the service life of the compressor controller is prolonged, and the long-term reliable operation of the compressor is ensured by starting the protection circuit and/or the temperature protection circuit.
Preferably, the start-up protection circuit 1 includes:
the energy storage device 11, the energy storage device 11 is connected with the compressor controller;
a first circuit for directing a supply current to the energy storage device 11 at the moment of compressor energization;
a second loop for diverting supply current to a load under control of the amount of power stored by the energy storage device 11.
Preferably, the energy storage device 11 is an energy storage capacitor.
Preferably, a current-limiting impedance 12 is arranged on the first loop;
a power switch 13 is arranged on the second loop, and the power switch 13 is connected with a load;
the power switch 13 is connected in parallel to two ends of the current-limiting impedance 12, and a control end of the power switch 13 is connected with the energy storage device 11; the impedance of the power switch 13 < the current limiting impedance 12.
It will be appreciated that when the compressor is powered on, power supply current flows through the first circuit to charge the energy storage device. And when the voltage stored by the energy storage device reaches the breakover voltage of the power switch on the second loop, the power switch is turned on. Because the power switch impedance is lower than the current limiting impedance on the first loop, the current flows from the second loop to the energy storage device instead, and after the conduction, the current only flows to the second loop. Because the power switch is connected with the load, the current flows to the load (such as a compressor) through the power switch of the second loop, and the load starts to work at this time, so that the surge current at the moment of power-on starting is restrained.
Preferably, the start-up protection circuit 1 further includes:
a voltage feedback circuit 14, wherein the voltage feedback circuit 14 is connected between the energy storage device 11 and the control terminal of the power switch 13;
the voltage feedback circuit 14 is configured to control the power switch 13 to be turned on when the voltage stored in the energy storage device 11 reaches the turn-on voltage of the power switch 13.
It can be understood that the power switch is controlled to be opened and closed through the power supply feedback circuit, the control is more accurate, and the reliability of the whole circuit is higher.
Preferably, the temperature protection circuit 2 includes:
the temperature sensor 21 is used for detecting the real-time temperature of the environment where the compressor controller is located and sending the real-time temperature to the compressor controller;
and the compressor controller is specifically used for controlling the rotating speed of the compressor according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
Preferably, the compressor controller is specifically configured to reduce the rotation speed of the compressor when the real-time temperature is higher than a critical upper limit temperature of normal operation of the compressor controller, so that the temperature of the compressor controller is kept below the critical upper limit temperature of normal operation.
Preferably, the temperature protection circuit 2 further includes:
a bypass valve 22, said bypass valve 22 connected between said compressor controller and compressor;
and the compressor controller is also used for controlling the suction volume of the refrigerant of the compressor by adjusting the bypass valve according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
Preferably, the compressor controller is specifically configured to increase a refrigerant suction amount of the compressor by adjusting the bypass valve when the real-time temperature is higher than a critical upper limit temperature of normal operation of the compressor controller, so that the temperature of the compressor controller is reduced to below the critical upper limit temperature of normal operation.
Preferably, the temperature protection circuit 2 further includes:
and the analog-to-digital converter 23 is connected between the temperature sensor 21 and the compressor controller, and is used for converting the temperature analog signal acquired by the temperature sensor 21 into a temperature digital signal.
It can be appreciated that the temperature sensor detects the real-time temperature of the environment in which the compressor controller is located, and when the temperature approaches the critical upper limit temperature for normal operation of the compressor controller, the compressor controller sends a signal to the compressor to reduce the speed of rotation. In addition, in order to better control the temperature of the compressor controller, a bypass valve of the compressor can be controlled, so that the refrigerant sucked into the compressor is larger than the refrigerant discharged, and the refrigerant flows through a controller heat dissipation plate, so that the temperature of the compressor controller is reduced.
It can be understood that the real-time temperature of the environment where the compressor controller is located is equivalent to the temperature of the compressor controller, and whether the temperature of the compressor controller is too high or not can be known by detecting the real-time temperature of the environment where the compressor controller is located, if so, the temperature is adjusted through the temperature protection circuit so as to avoid the performance of the internal power module of the compressor controller from being influenced by the too high temperature.
Fig. 2 is a schematic block diagram illustrating a compressor protection circuit according to another exemplary embodiment, as shown in fig. 2, the circuit including:
the energy storage device 11, the energy storage device 11 is connected with the compressor controller;
a first circuit for directing a supply current to the energy storage device 11 at the moment of compressor energization;
a second loop for diverting supply current to a load under control of the amount of power stored by the energy storage device 11;
a current-limiting impedance 12 is arranged on the first loop;
a power switch 13 is arranged on the second loop, and the power switch 13 is connected with a load;
the power switch 13 is connected in parallel to two ends of the current-limiting impedance 12, and a control end of the power switch 13 is connected with the energy storage device 11; the impedance of the power switch 13 is less than the current limiting impedance 12;
a voltage feedback circuit 14 connected between the energy storage device 11 and the control terminal of the power switch 13;
the voltage feedback circuit 14 is configured to control the power switch 13 to be turned on when the voltage stored in the energy storage device 11 reaches the turn-on voltage of the power switch 13;
the temperature sensor 21 is used for detecting the real-time temperature of the environment where the compressor controller is located and sending the real-time temperature to the compressor controller;
the compressor controller is specifically configured to reduce the rotation speed of the compressor when the real-time temperature is higher than a critical upper limit temperature at which the compressor controller normally operates, so that the temperature of the compressor controller is kept below the critical upper limit temperature at which the compressor controller normally operates;
a bypass valve 22 connected between the compressor controller and the compressor;
the compressor controller is specifically used for increasing the refrigerant suction quantity of the compressor by adjusting the bypass valve when the real-time temperature is higher than the critical upper limit temperature of the normal work of the compressor controller, so that the temperature of the compressor controller is reduced to be lower than the critical upper limit temperature of the normal work;
and the analog-to-digital converter 23 is connected between the temperature sensor 21 and the compressor controller, and is used for converting the temperature analog signal acquired by the temperature sensor 21 into a temperature digital signal.
The starting protection circuit can inhibit surge current at the moment of starting the compressor, so that the compressor controller can operate reliably for a long time, the electromagnetic interference performance of the compressor controller is improved, and the service life of components is prolonged;
the temperature protection circuit can detect the real-time temperature of the environment where the compressor controller is located, and adjust the temperature of the compressor controller according to the real-time temperature, so that the temperature of the compressor controller is kept below the critical upper limit temperature of normal operation, the working environment of the compressor controller is optimized, and the performance of the compressor controller is improved;
according to the technical scheme, the performance of the compressor controller is improved by starting the protection circuit and the temperature protection circuit, the service life of the compressor controller is prolonged, and the long-term reliable operation of the compressor is guaranteed.
According to another exemplary embodiment there is shown a compressor comprising:
the compressor protection circuit is described above.
The starting protection circuit can inhibit surge current at the moment of starting the compressor, so that the compressor controller can operate reliably for a long time, the electromagnetic interference performance of the compressor controller is improved, and the service life of components is prolonged;
the temperature protection circuit can detect the real-time temperature of the environment where the compressor controller is located, and adjust the temperature of the compressor controller according to the real-time temperature, so that the temperature of the compressor controller is kept below the critical upper limit temperature of normal operation, the working environment of the compressor controller is optimized, and the performance of the compressor controller is improved;
according to the technical scheme provided by the embodiment, the performance of the compressor controller is improved, the service life of the compressor controller is prolonged, and the long-term reliable operation of the compressor is ensured by starting the protection circuit and/or the temperature protection circuit.
An air conditioner according to another exemplary embodiment is shown, including:
the compressor described above.
The starting protection circuit can inhibit surge current at the moment of starting the compressor, so that the compressor controller can operate reliably for a long time, the electromagnetic interference performance of the compressor controller is improved, and the service life of components is prolonged;
the temperature protection circuit can detect the real-time temperature of the environment where the compressor controller is located, and adjust the temperature of the compressor controller according to the real-time temperature, so that the temperature of the compressor controller is kept below the critical upper limit temperature of normal operation, the working environment of the compressor controller is optimized, and the performance of the compressor controller is improved;
according to the technical scheme provided by the embodiment, the performance of the compressor controller is improved, the service life of the compressor controller is prolonged, and the long-term reliable operation of the compressor is ensured by starting the protection circuit and/or the temperature protection circuit.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means at least two unless otherwise specified.
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 specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations 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 embodiments of the present invention.
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. For example, 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, each functional unit 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.
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 do not necessarily 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.
Although embodiments of the present invention have been shown and described, 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 without departing from the scope of the present invention.
Claims (12)
1. A compressor protection circuit, comprising:
the starting protection circuit is connected with the compressor controller and used for inhibiting surge current at the moment of starting the compressor; and/or the presence of a gas in the gas,
the temperature protection circuit is used for detecting the real-time temperature of the environment where the compressor controller is located and adjusting the temperature of the compressor controller according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
2. The circuit of claim 1, wherein the start-up protection circuit comprises:
the energy storage device is connected with the compressor controller;
the first loop is used for guiding power supply current to the energy storage device at the moment of electrifying the compressor;
a second loop for diverting supply current to a load under control of the amount of power stored by the energy storage device.
3. The circuit of claim 2,
a current-limiting impedance is arranged on the first loop;
a power switch is arranged on the second loop and is connected with a load;
the power switch is connected in parallel at two ends of the current-limiting impedance, and a control end of the power switch is connected with the energy storage device; the impedance of the power switch is less than the current limiting impedance.
4. The circuit of claim 3, wherein the start-up protection circuit further comprises:
a voltage feedback circuit connected between the energy storage device and the control terminal of the power switch;
and the voltage feedback circuit is used for controlling the power switch to be switched on when the voltage stored by the energy storage device reaches the breakover voltage of the power switch.
5. The circuit of claim 1, wherein the temperature protection circuit comprises:
the temperature sensor is used for detecting the real-time temperature of the environment where the compressor controller is located and sending the real-time temperature to the compressor controller;
and the compressor controller is specifically used for controlling the rotating speed of the compressor according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
6. The circuit of claim 5,
the compressor controller is specifically configured to reduce the rotation speed of the compressor when the real-time temperature is higher than a critical upper limit temperature at which the compressor controller normally operates, so that the temperature of the compressor controller is kept below the critical upper limit temperature at which the compressor controller normally operates.
7. The circuit of claim 5, wherein the temperature protection circuit further comprises:
a bypass valve connected between the compressor controller and the compressor;
and the compressor controller is also used for controlling the suction volume of the refrigerant of the compressor by adjusting the bypass valve according to the real-time temperature so as to keep the temperature of the compressor controller below the critical upper limit temperature of normal operation.
8. The circuit of claim 7,
the compressor controller is specifically used for increasing the refrigerant suction amount of the compressor by adjusting the bypass valve when the real-time temperature is higher than the critical upper limit temperature of the normal work of the compressor controller, so that the temperature of the compressor controller is reduced to be lower than the critical upper limit temperature of the normal work.
9. The circuit of claim 5, wherein the temperature protection circuit further comprises:
and the analog-to-digital converter is connected between the temperature sensor and the compressor controller and is used for converting the temperature analog signal acquired by the temperature sensor into a temperature digital signal.
10. The circuit of claim 2,
the energy storage device is an energy storage capacitor.
11. A compressor, comprising:
a compressor protection circuit as claimed in any one of claims 1 to 10.
12. An air conditioner, comprising:
the compressor of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921187769.3U CN210111598U (en) | 2019-07-25 | 2019-07-25 | Compressor protection circuit, compressor and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921187769.3U CN210111598U (en) | 2019-07-25 | 2019-07-25 | Compressor protection circuit, compressor and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN210111598U true CN210111598U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921187769.3U Active CN210111598U (en) | 2019-07-25 | 2019-07-25 | Compressor protection circuit, compressor and air conditioner |
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|---|---|
| CN (1) | CN210111598U (en) |
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2019
- 2019-07-25 CN CN201921187769.3U patent/CN210111598U/en active Active
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