CN107355951B - Air conditioner refrigeration mode control method and device and air conditioner - Google Patents
Air conditioner refrigeration mode control method and device and air conditioner Download PDFInfo
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- CN107355951B CN107355951B CN201710627095.3A CN201710627095A CN107355951B CN 107355951 B CN107355951 B CN 107355951B CN 201710627095 A CN201710627095 A CN 201710627095A CN 107355951 B CN107355951 B CN 107355951B
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Abstract
The embodiment of the invention provides an air conditioner refrigeration mode control method and device and an air conditioner, and belongs to the field of air conditioners. The method comprises the following steps: judging whether a temperature sensing unit of the frequency conversion module fails or not; when the temperature sensing unit of the frequency conversion module fails, detecting the ambient temperature; and reducing the limiting frequency of the compressor according to the environment temperature, wherein the running frequency of the compressor is not more than the limiting frequency. The air conditioner refrigeration mode control method and device and the air conditioner can ensure the reliability of the system and ensure the normal use of a user under the condition that the temperature sensing unit of the frequency conversion module fails.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an air conditioner refrigeration mode control method and device and an air conditioner.
Background
At present, a plurality of air conditioner manufacturers commonly use a refrigerant heat dissipation mode to cool the frequency conversion module, and compared with the traditional air cooling, the refrigerant heat dissipation mode can greatly reduce the temperature of the frequency conversion module, and becomes a main technical stream. The outdoor environment temperature and the temperature of the frequency conversion module are generally adopted to correct the frequency of the compressor in the refrigeration mode, and when the temperature sensing unit of the frequency conversion module fails, the system is protected by adopting a direct shutdown mode.
The inventor of the present application finds that the above solution of the prior art has the following defects in the process of implementing the present invention: when the temperature sensing unit of the frequency conversion module fails, the system is protected by adopting a direct shutdown mode, and the normal use of a user can be influenced.
Disclosure of Invention
The embodiment of the invention aims to provide an air conditioner refrigeration mode control method, an air conditioner refrigeration mode control device and an air conditioner.
In order to achieve the above object, an embodiment of the present invention provides an air conditioner cooling mode control method, including: judging whether a temperature sensing unit of the frequency conversion module fails or not; when the temperature sensing unit of the frequency conversion module fails, detecting the ambient temperature; and reducing the limiting frequency of the compressor according to the environment temperature, wherein the running frequency of the compressor is not more than the limiting frequency.
Preferably, the method further comprises: detecting the temperature of the refrigerant pipe; wherein, when at least one of the following conditions is satisfied, the frequency conversion module temperature sensing unit is judged to be invalid: the temperature detected by the temperature sensing unit of the frequency conversion module is out of a preset range; the difference between the temperature detected by the temperature sensing unit of the frequency conversion module and the temperature of the refrigerant pipe is greater than a first preset value.
Preferably, the reduced limiting frequency is proportional to the ambient temperature.
Preferably, the method further comprises: and under the conditions of manual shutdown, mode switching or fault shutdown and fault elimination time greater than or equal to a second preset value, when the compressor is restarted, whether the temperature sensing unit of the frequency conversion module fails or not is judged again.
Preferably, the method further comprises: and limiting the operation frequency of the compressor at the reduced limiting frequency when restarting the compressor under the condition that the shutdown is stopped or failed to stop when the set temperature is reached and the fault elimination time is less than a second preset value.
The embodiment of the invention also provides an air conditioner refrigeration mode control device, which comprises: the temperature sensing device comprises a detection unit and a control unit, wherein the control unit is used for judging whether a temperature sensing unit of the frequency conversion module fails or not; the detection unit is used for detecting the ambient temperature when the temperature sensing unit of the frequency conversion module fails; the control unit is also used for reducing the limiting frequency of the compressor according to the environment temperature, wherein the running frequency of the compressor is not more than the limiting frequency.
Preferably, the detection unit is further configured to detect a temperature of the refrigerant pipe; wherein, when at least one of the following conditions is satisfied, the control unit judges that the temperature sensing unit of the frequency conversion module is invalid: the temperature detected by the temperature sensing unit of the frequency conversion module is out of a preset range; the difference between the temperature detected by the temperature sensing unit of the frequency conversion module and the temperature of the refrigerant pipe is greater than a first preset value.
Preferably, the control unit is further configured to: and under the conditions of manual shutdown, mode switching or fault shutdown and fault elimination time greater than or equal to a second preset value, when the compressor is restarted, whether the temperature sensing unit of the frequency conversion module fails or not is judged again.
Preferably, the control unit is further configured to: in the case where the shutdown is achieved at the set temperature or the fault shutdown is performed with the fault elimination time being less than the second preset value, the operating frequency of the compressor is limited at the reduced limiting frequency when the compressor is restarted.
The embodiment of the invention also provides an air conditioner, which comprises the air conditioner refrigeration mode control device.
By adopting the technical scheme, the air conditioner refrigeration mode control method, the device and the air conditioner provided by the invention have the advantages that: judging whether a temperature sensing unit of the frequency conversion module fails or not; when the temperature sensing unit of the frequency conversion module fails, detecting the ambient temperature; and reducing the limiting frequency of the compressor according to the environment temperature, wherein the running frequency of the compressor is not more than the limiting frequency. The air conditioner refrigeration mode control method and device and the air conditioner can ensure the reliability of the system and ensure the normal use of a user under the condition that the temperature sensing unit of the frequency conversion module fails.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 is a flowchart illustrating a method for controlling a cooling mode of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of an air conditioner cooling mode control method according to another embodiment of the present invention;
fig. 3 is a flowchart of a cooling mode control method of an air conditioner according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an air-conditioning cooling mode control device according to an embodiment of the present invention.
Description of the reference numerals
1 detection unit 2 control unit.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flowchart of an air conditioner cooling mode control method according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides an air conditioner cooling mode control method, including: judging whether the temperature sensing unit of the frequency conversion module fails or not (step S11); detecting the ambient temperature when the temperature sensing unit of the frequency conversion module fails (step S12); reducing a limit frequency of a compressor according to the ambient temperature, wherein an operation frequency of the compressor is not greater than the limit frequency (step S13); and when the temperature sensing unit of the frequency conversion module does not fail, the air conditioner normally operates (step S14).
The temperature sensing unit of the frequency conversion module is a device for monitoring the temperature of the frequency conversion module, so as to adjust the running frequency of the compressor according to the temperature of the frequency conversion module and the ambient temperature. The compressor has a limiting frequency for limiting an operating frequency of the compressor, which is related to an ambient temperature, to prevent the operating frequency of the compressor from being excessive.
When the variable frequency temperature sensing unit fails, the operation frequency of the compressor cannot be controlled any more. In the embodiment of the invention, the reliability of the air conditioning system can be ensured by reducing the limiting frequency of the compressor, wherein the reduced limiting frequency is proportional to the ambient temperature, and the more the ambient temperature is, the more the reduced limiting frequency is.
Fig. 2 is a flowchart of an air conditioner cooling mode control method according to another embodiment of the present invention. As shown in fig. 2, the method further comprises: detecting the temperature of the refrigerant pipe (step S21); judging whether the temperature sensing unit of the frequency conversion module fails or not according to the temperature detected by the temperature sensing unit of the frequency conversion module and the temperature of the refrigerant pipe (step S22); detecting the ambient temperature when the temperature sensing unit of the frequency conversion module fails (step S23); reducing a limit frequency of a compressor according to the ambient temperature, wherein an operation frequency of the compressor is not greater than the limit frequency (step S24); and when the temperature sensing unit of the frequency conversion module does not fail, the air conditioner normally operates (step S25).
Wherein, when at least one of the following conditions is satisfied, the frequency conversion module temperature sensing unit is judged to be invalid: the temperature detected by the temperature sensing unit of the frequency conversion module is out of a preset range; the difference between the temperature detected by the temperature sensing unit of the frequency conversion module and the temperature of the refrigerant pipe is greater than a first preset value.
The present embodiment provides a method for detecting whether a temperature sensing unit of a frequency conversion module fails, wherein when determining whether the temperature sensing unit of the frequency conversion module fails, it is only necessary to determine whether one of the above-mentioned conditions is satisfied to determine that the temperature sensing unit of the frequency conversion module fails, but when determining whether the temperature sensing unit of the frequency conversion module is valid, it is only necessary to satisfy both the above-mentioned conditions to determine that the temperature sensing unit of the frequency conversion module is valid.
In the embodiment of the present invention, if it is determined that the temperature sensing unit of the frequency conversion module is failed, an alarm signal may be sent to remind a user, where the alarm signal may be an acoustic or optical alarm signal, which is not limited herein.
Fig. 3 is a flowchart of an air conditioner cooling mode control method according to another embodiment of the present invention. As shown in fig. 3, the method further comprises: judging a compressor stop reason when the compressor is stopped (step S31); when the compressor is restarted, whether the temperature sensing unit of the frequency conversion module fails or not is judged again under the conditions of manual shutdown, mode switching or fault shutdown and fault elimination time greater than or equal to a second preset value (step S32); in the case where the set temperature stop or the trouble stop is reached and the trouble elimination time is less than the second preset value, the operation frequency of the compressor is limited at the reduced limiting frequency when the compressor is restarted (step S33).
For the case that the temperature sensing unit of the frequency conversion module fails, the embodiment provides a plurality of processing modes after shutdown. When restarting the compressor, the air conditioner can perform two different controls: firstly, judging whether a temperature sensing unit of the frequency conversion module fails again; secondly, to continue limiting the operating frequency of the compressor at the reduced limiting frequency, and which of these two different controls is related to the cause of the compressor shutdown.
In this embodiment, when the compressor is shut down, switched to a mode, or stopped due to a fault, and the time for eliminating the fault is greater than or equal to the second preset value, it may be considered that the temperature sensing unit of the frequency conversion module has time to be repaired, so that when the compressor is restarted, whether the temperature sensing unit of the frequency conversion module fails or not may be determined again; when the compressor is stopped at the set temperature or is stopped in a fault and the fault elimination time is less than the second preset value, the temperature sensing unit of the frequency conversion module is not repaired in time, so that the running frequency of the compressor is limited by the reduced limiting frequency when the compressor is restarted. In the embodiment of the present invention, the second preset value is preferably 10 minutes.
Fig. 4 is a schematic structural diagram of an air-conditioning cooling mode control device according to an embodiment of the present invention. As shown in fig. 4, an embodiment of the present invention further provides an air conditioner cooling mode control device, including: the temperature sensing device comprises a detection unit 1 and a control unit 2, wherein the control unit 2 is used for judging whether a temperature sensing unit of a frequency conversion module fails or not; the detection unit 1 is used for detecting the ambient temperature when the temperature sensing unit of the frequency conversion module fails; the control unit 2 is further configured to reduce a limiting frequency of the compressor according to the ambient temperature, wherein the operating frequency of the compressor is not greater than the limiting frequency.
Preferably, the detection unit 1 is further configured to detect a temperature of the refrigerant pipe; wherein, when at least one of the following conditions is satisfied, the control unit 2 determines that the temperature sensing unit of the frequency conversion module is failed: the temperature detected by the temperature sensing unit of the frequency conversion module is out of a preset range; the difference between the temperature detected by the temperature sensing unit of the frequency conversion module and the temperature of the refrigerant pipe is greater than a first preset value.
Preferably, the control unit 2 is further configured to: and under the conditions of manual shutdown, mode switching or fault shutdown and fault elimination time greater than or equal to a second preset value, when the compressor is restarted, whether the temperature sensing unit of the frequency conversion module fails or not is judged again.
Preferably, the control unit 2 is further configured to: in the case where the shutdown is achieved at the set temperature or the fault shutdown is performed with the fault elimination time being less than the second preset value, the operating frequency of the compressor is limited at the reduced limiting frequency when the compressor is restarted.
The embodiment of the invention also provides an air conditioner, which comprises the air conditioner refrigeration mode control device.
By adopting the technical scheme, the air conditioner refrigeration mode control method, the device and the air conditioner provided by the invention have the advantages that: judging whether a temperature sensing unit of the frequency conversion module fails or not; when the temperature sensing unit of the frequency conversion module fails, detecting the ambient temperature; and reducing the limiting frequency of the compressor according to the environment temperature, wherein the running frequency of the compressor is not more than the limiting frequency. The air conditioner refrigeration mode control method and device and the air conditioner can ensure the reliability of the system and ensure the normal use of a user under the condition that the temperature sensing unit of the frequency conversion module fails.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (6)
1. A control method for a refrigeration mode of an air conditioner is characterized by comprising the following steps:
judging whether a temperature sensing unit of the frequency conversion module fails or not;
when the temperature sensing unit of the frequency conversion module fails, detecting the ambient temperature;
reducing a limiting frequency of a compressor according to the ambient temperature, wherein the operating frequency of the compressor is not greater than the limiting frequency;
when the compressor is stopped, judging the reason for stopping the compressor;
when the compressor is restarted, whether the temperature sensing unit of the frequency conversion module fails or not is judged again under the conditions of manual shutdown, mode switching or fault shutdown and fault elimination time greater than or equal to a second preset value;
and limiting the operation frequency of the compressor at the reduced limiting frequency when restarting the compressor under the condition that the shutdown is stopped or failed to stop when the set temperature is reached and the fault elimination time is less than a second preset value.
2. A method of controlling a cooling mode of an air conditioner according to claim 1, further comprising:
detecting the temperature of the refrigerant pipe;
wherein, when at least one of the following conditions is satisfied, the frequency conversion module temperature sensing unit is judged to be invalid:
the temperature detected by the temperature sensing unit of the frequency conversion module is out of a preset range;
the difference between the temperature detected by the temperature sensing unit of the frequency conversion module and the temperature of the refrigerant pipe is greater than a first preset value.
3. A method as claimed in claim 1, wherein the reduced limiting frequency is proportional to the ambient temperature.
4. An air conditioner refrigeration mode control device, characterized in that the device comprises:
a detection unit and a control unit, wherein,
the control unit is used for judging whether the temperature sensing unit of the frequency conversion module fails or not;
the detection unit is used for detecting the ambient temperature when the temperature sensing unit of the frequency conversion module fails;
the control unit is also used for reducing the limiting frequency of the compressor according to the ambient temperature, wherein the running frequency of the compressor is not more than the limiting frequency;
the control unit is further configured to:
when the compressor is stopped, judging the reason for stopping the compressor;
when the compressor is restarted, whether the temperature sensing unit of the frequency conversion module fails or not is judged again under the conditions of manual shutdown, mode switching or fault shutdown and fault elimination time greater than or equal to a second preset value;
in the case where the shutdown is achieved at the set temperature or the fault shutdown is performed with the fault elimination time being less than the second preset value, the operating frequency of the compressor is limited at the reduced limiting frequency when the compressor is restarted.
5. The air conditioning cooling mode control device of claim 4,
the detection unit is also used for detecting the temperature of the refrigerant pipe;
wherein, when at least one of the following conditions is satisfied, the control unit judges that the temperature sensing unit of the frequency conversion module is invalid:
the temperature detected by the temperature sensing unit of the frequency conversion module is out of a preset range;
the difference between the temperature detected by the temperature sensing unit of the frequency conversion module and the temperature of the refrigerant pipe is greater than a first preset value.
6. An air conditioner, characterized in that the air conditioner comprises the air conditioner cooling mode control device of any one of claims 4-5.
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| CN201710627095.3A CN107355951B (en) | 2017-07-26 | 2017-07-26 | Air conditioner refrigeration mode control method and device and air conditioner |
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| CN201710627095.3A CN107355951B (en) | 2017-07-26 | 2017-07-26 | Air conditioner refrigeration mode control method and device and air conditioner |
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| CN107355951B true CN107355951B (en) | 2020-03-31 |
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| CN101109553A (en) * | 2006-07-19 | 2008-01-23 | 乐金电子(天津)电器有限公司 | Method for limiting inverter compressor maximum frequency according to outdoor environment temperature |
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| CN105299825A (en) * | 2015-06-30 | 2016-02-03 | 广东美的暖通设备有限公司 | Frequency-limiting protection method for air conditioner |
| CN105953357A (en) * | 2016-04-28 | 2016-09-21 | 宁波奥克斯空调有限公司 | Control method for variable frequency air conditioner |
| CN106839163A (en) * | 2017-03-14 | 2017-06-13 | 芜湖美智空调设备有限公司 | Heat radiation protection device, method and air-conditioner for the outdoor Electrical Control of air-conditioner |
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2017
- 2017-07-26 CN CN201710627095.3A patent/CN107355951B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07332730A (en) * | 1994-06-02 | 1995-12-22 | Toshiba Corp | Air-conditioning machine |
| CN101109553A (en) * | 2006-07-19 | 2008-01-23 | 乐金电子(天津)电器有限公司 | Method for limiting inverter compressor maximum frequency according to outdoor environment temperature |
| CN102466304A (en) * | 2010-11-16 | 2012-05-23 | 力博特公司 | Air-conditioning system and control method of condensation fan thereof |
| CN105299825A (en) * | 2015-06-30 | 2016-02-03 | 广东美的暖通设备有限公司 | Frequency-limiting protection method for air conditioner |
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