CN112665099A - Compressor exhaust high-temperature protection control method and device, air conditioner and control system - Google Patents

Compressor exhaust high-temperature protection control method and device, air conditioner and control system Download PDF

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Publication number
CN112665099A
CN112665099A CN202011434817.1A CN202011434817A CN112665099A CN 112665099 A CN112665099 A CN 112665099A CN 202011434817 A CN202011434817 A CN 202011434817A CN 112665099 A CN112665099 A CN 112665099A
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China
Prior art keywords
compressor
temperature
exhaust
expansion valve
electronic expansion
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CN202011434817.1A
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Inventor
刘静楠
宋海川
董小林
徐甘来
雷敏
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202011434817.1A priority Critical patent/CN112665099A/en
Publication of CN112665099A publication Critical patent/CN112665099A/en
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Abstract

The invention relates to a method and a device for controlling high-temperature protection of exhaust of a compressor, an air conditioner and a control system, wherein the method for controlling high-temperature protection of exhaust of the compressor comprises the following steps: acquiring the exhaust temperature of a compressor; judging whether the exhaust temperature of the compressor is normal or not; and controlling the running state of the compressor according to the judgment result. Before the control method of the invention reaches the exhaust high-temperature protection threshold, the opening of the electronic expansion valve and the frequency of the compressor are adjusted according to the exhaust temperature of the compressor, and the exhaust temperature of the compressor is reduced by increasing the opening of the electronic expansion valve and reducing the frequency of the compressor, thereby avoiding the influence on the performance and the service life of the compressor due to the frequent shutdown and startup of the compressor and being beneficial to ensuring the normal work of the compressor.

Description

Compressor exhaust high-temperature protection control method and device, air conditioner and control system
Technical Field
The invention relates to the technical field of compressor control, in particular to a compressor exhaust high-temperature protection control method, a compressor exhaust high-temperature protection control device, an air conditioner and a control system.
Background
In order to avoid damage to the compressor due to excessive exhaust temperature, the existing control method is to protect the compressor by detecting the exhaust temperature through a temperature sensing bulb, and the compressor is stopped immediately to protect when the exhaust temperature reaches an exhaust high-temperature protection threshold. The method stops the compressor when the high-temperature protection of the exhaust gas occurs, releases the protection after the high-temperature protection is removed, and starts the compressor again to work, if the detected exhaust gas temperature fluctuates around the temperature threshold, the high-temperature protection frequently occurs, the compressor is frequently stopped and started, the compressor cannot normally work, the use performance of the compressor is affected by frequent switching, and even the service life of the compressor is reduced.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for controlling high temperature protection of compressor discharge, an air conditioner and a control system, so as to solve the problem in the prior art that the performance and the service life of the compressor are affected due to frequent shutdown and startup of the compressor.
In order to achieve the purpose, the invention adopts the following technical scheme: a high-temperature protection control method for exhaust gas of a compressor comprises the following steps:
acquiring the exhaust temperature of a compressor;
judging whether the exhaust temperature of the compressor is normal or not;
and controlling the running state of the compressor according to the judgment result.
Optionally, determining whether the compressor discharge temperature is normal includes:
if the compressor discharge temperature is within a normal temperature range, the compressor discharge temperature is normal; otherwise, the compressor discharge temperature is abnormal.
Optionally, the controlling the operation state of the compressor according to the determination result includes:
when the judgment result is that the exhaust temperature of the compressor is normal, controlling the compressor to keep running in the current state;
and when the judgment result is that the exhaust temperature of the compressor is abnormal, adjusting the opening of the electronic expansion valve and the frequency of the compressor according to the exhaust temperature of the compressor.
Optionally, the adjusting the opening of the electronic expansion valve and the frequency of the compressor according to the discharge temperature of the compressor includes:
when the exhaust temperature of the compressor is in a first preset temperature range, increasing the opening degree of the electronic expansion valve by a first specific value;
when the exhaust temperature of the compressor is in a second preset temperature range, increasing the opening degree of the electronic expansion valve by a second specific value;
when the exhaust temperature of the compressor is in a third preset temperature range, increasing the opening degree of the electronic expansion valve by a second specific value, and simultaneously reducing the frequency of the compressor;
the temperature values in the third preset temperature range are all larger than the temperature values in the second preset temperature range; the temperature values in the second preset temperature range are all larger than the temperature values in the first preset temperature range; the temperature values in the first preset temperature range are all larger than the temperature values in the normal temperature range; the second particular value is greater than the first particular value.
Optionally, the method further includes:
when the exhaust temperature of the compressor is greater than the maximum temperature value within the third preset temperature range, controlling the compressor to enter shutdown protection;
and the maximum temperature value in the third preset temperature range is an exhaust high-temperature protection threshold value.
Optionally, the method further includes:
and when the exhaust temperature of the compressor is lower than the minimum temperature value in the normal temperature range, controlling the compressor to stop and debugging the compressor again.
The invention also provides a high-temperature protection control device for compressor exhaust, which comprises:
the acquisition module is used for acquiring the exhaust temperature of the compressor;
the judging module is used for judging whether the exhaust temperature of the compressor is normal or not;
a control module for controlling the operation state of the compressor according to the judgment result
The present invention also provides an air conditioner, comprising:
the compressor, and, as stated before, the compressor exhausts the high temperature protection controlling device.
The present invention also provides a control system comprising:
the system comprises an air conditioner, an interface machine server and a management server;
the air conditioner is internally provided with a wireless communication module; the air conditioner is used for sending the exhaust temperature of the compressor, the opening of the electronic expansion valve and the frequency information of the compressor to the interface server through the wireless communication module;
the interface server is used for acquiring information sent by the air conditioner and transmitting the information to the management server; and the management server determines the opening degree of the electronic expansion valve and the frequency of the compressor according to the exhaust temperature, and sends the determined opening degree of the electronic expansion valve and the frequency of the compressor to the air conditioner through the interface machine server.
Optionally, after encrypting and compressing the compressor discharge temperature, the electronic expansion valve opening degree, and the compressor frequency information, the air conditioner sends the encrypted and compressed data to the interface server through the wireless communication module;
and the interface machine server decompresses and decrypts the acquired air conditioner information and transmits the decompressed and decrypted data to the management server.
Optionally, the method further includes:
a storage server;
and the storage server is connected with the management server and is used for storing the exhaust temperature, the opening of the electronic expansion valve and the frequency information of the compressor of the air conditioner, which are received by the management server.
By adopting the technical scheme, the method for protecting and controlling the high-temperature exhaust of the compressor comprises the following steps: acquiring the exhaust temperature of a compressor; judging whether the exhaust temperature of the compressor is normal or not; and controlling the running state of the compressor according to the judgment result. Before the control method of the invention reaches the exhaust high-temperature protection threshold, the opening of the electronic expansion valve and the frequency of the compressor are adjusted according to the exhaust temperature of the compressor, and the exhaust temperature of the compressor is reduced by increasing the opening of the electronic expansion valve and reducing the frequency of the compressor, thereby avoiding the influence on the performance and the service life of the compressor due to the frequent shutdown and startup of the compressor and being beneficial to ensuring the normal work of the compressor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for controlling high-temperature protection of exhaust gas from a compressor according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a second embodiment of the method for controlling high temperature protection of compressor discharge according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of a high-temperature protection control device for compressor discharge according to the present invention;
fig. 4 is a schematic structural diagram provided by an embodiment of a control system of the present invention.
In the figure: 1. an acquisition module; 2. a judgment module; 3. a control module; 4. an air conditioner; 5. an interface machine server; 6. a management server; 7. a wireless communication module; 8. and a storage server.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic flow chart of a method for controlling high-temperature protection of compressor discharge according to an embodiment of the present invention.
As shown in fig. 1, the method for controlling high-temperature protection of exhaust gas of a compressor according to the present embodiment includes:
s11: acquiring the exhaust temperature of a compressor;
s12: judging whether the exhaust temperature of the compressor is normal or not;
further, judging whether the exhaust temperature of the compressor is normal or not comprises the following steps:
if the compressor discharge temperature is within a normal temperature range, the compressor discharge temperature is normal; otherwise, the compressor discharge temperature is abnormal.
S13: and controlling the running state of the compressor according to the judgment result.
Further, the controlling the operation state of the compressor according to the judgment result includes:
when the judgment result is that the exhaust temperature of the compressor is normal, controlling the compressor to keep running in the current state;
and when the judgment result is that the exhaust temperature of the compressor is abnormal, adjusting the opening of the electronic expansion valve and the frequency of the compressor according to the exhaust temperature of the compressor.
Fig. 2 is a schematic flow chart of a second embodiment of the method for controlling high-temperature protection of compressor discharge according to the present invention.
As shown in fig. 2, the method for controlling high-temperature protection of exhaust gas of a compressor according to the present embodiment includes:
s21: acquiring the exhaust temperature of a compressor;
s22: judging whether the exhaust temperature of the compressor is normal or not;
s23: when the judgment result is that the exhaust temperature of the compressor is normal, controlling the compressor to keep running in the current state;
when the judgment result is that the exhaust temperature of the compressor is abnormal, executing steps S24-S28;
s24: when the exhaust temperature of the compressor is in a first preset temperature range, increasing the opening degree of the electronic expansion valve by a first specific value;
s25: when the exhaust temperature of the compressor is in a second preset temperature range, increasing the opening degree of the electronic expansion valve by a second specific value;
s26: when the exhaust temperature of the compressor is in a third preset temperature range, increasing the opening degree of the electronic expansion valve by a second specific value, and simultaneously reducing the frequency of the compressor;
the temperature values in the third preset temperature range are all larger than the temperature values in the second preset temperature range; the temperature values in the second preset temperature range are all larger than the temperature values in the first preset temperature range; the temperature values in the first preset temperature range are all larger than the temperature values in the normal temperature range; the second particular value is greater than the first particular value.
S27: when the exhaust temperature of the compressor is greater than the maximum temperature value within the third preset temperature range, controlling the compressor to enter shutdown protection;
and the maximum temperature value in the third preset temperature range is an exhaust high-temperature protection threshold value.
S28: and when the exhaust temperature of the compressor is lower than the minimum temperature value in the normal temperature range, controlling the compressor to stop and debugging the compressor again.
In practical use of the embodiment, the normal temperature range may be 92 ℃ to t ≤ 97 ℃, the first preset temperature range may be 97 ℃ to t ≤ 102 ℃, the second preset temperature range may be 102 ℃ to t ≤ 105 ℃, and the third preset temperature range may be 105 ℃ to t ≤ 115 ℃.
After the air conditioning unit normally operates, the operation state of the compressor is controlled according to the actually collected compressor exhaust temperature: and if the discharge temperature of the compressor is higher than 92 ℃ and less than or equal to 97 ℃, the current discharge temperature of the compressor is normal, and the compressor is controlled to keep running in the current state. If the discharge temperature of the compressor is higher than 97 ℃ and less than or equal to 102 ℃, the opening degree of the electronic expansion valve is increased by 1% (the first specific value) so as to reduce the discharge temperature and prevent the discharge from entering high-temperature protection. If the discharge temperature of the compressor is higher than 102 ℃ and less than or equal to 105 ℃, the opening degree of the electronic expansion valve is increased by 2 percent (a second specific value) so as to reduce the discharge temperature and prevent the discharge gas from entering high-temperature protection. If the exhaust temperature of the compressor is more than 105 ℃ and less than or equal to 115 ℃, the opening degree of the electronic expansion valve is increased by 2 percent, and the frequency of the compressor is reduced by 5HZ, so that the exhaust temperature is reduced and the high-temperature protection of the exhaust is not allowed.
If the discharge temperature of the compressor exceeds the threshold value of 115 ℃, the measures cannot be taken to achieve the expected effect, and the compressor is controlled to enter the shutdown protection so as to avoid the damage of the compressor caused by overhigh discharge temperature.
Further, when the exhaust temperature of the compressor is less than or equal to 92 ℃, the measures are adopted to achieve the expected effect, the fact that the air conditioning unit is not operated normally is indicated, the compressor is controlled to stop, and the compressor is debugged again.
It should be noted that the values related in this embodiment may be set according to actual situations, and this embodiment is only an example and does not have a limiting effect on the protection range.
According to the control method, before the exhaust high-temperature protection threshold value is reached, the opening of the electronic expansion valve and the frequency of the compressor are adjusted according to the exhaust temperature of the compressor, and the exhaust temperature of the compressor is reduced by increasing the opening of the electronic expansion valve and reducing the frequency of the compressor, so that the performance and the service life of the compressor are prevented from being influenced by frequent shutdown and startup of the compressor, and the normal work of the compressor is favorably ensured.
Fig. 3 is a schematic structural diagram provided by an embodiment of the control device for high-temperature protection of exhaust gas of a compressor according to the present invention.
As shown in fig. 3, the high temperature protection control device for compressor exhaust according to this embodiment includes:
the acquisition module 1 is used for acquiring the exhaust temperature of the compressor;
the judging module 2 is used for judging whether the exhaust temperature of the compressor is normal or not;
and the control module 3 is used for controlling the running state of the compressor according to the judgment result.
The working principle of the compressor exhaust high-temperature protection control device in this embodiment is the same as that of the compressor exhaust high-temperature protection control method in any of the above embodiments, and is not described herein again.
According to the control device, before the exhaust high-temperature protection threshold value is reached, the opening of the electronic expansion valve and the frequency of the compressor can be adjusted according to the exhaust temperature of the compressor, the exhaust temperature of the compressor is reduced by increasing the opening of the electronic expansion valve and reducing the frequency of the compressor, and therefore the problem that the performance and the service life of the compressor are affected due to frequent shutdown and startup of the compressor is avoided, and normal work of the compressor is guaranteed.
The present invention also provides an embodiment of an air conditioner, including:
the compressor, and the compressor exhaust high temperature protection control device as shown in figure 3.
Fig. 4 is a schematic structural diagram provided by an embodiment of a control system of the present invention.
As shown in fig. 4, a control system according to this embodiment includes:
an air conditioner 4, an interface machine server 5 and a management server 6;
a wireless communication module 7 is arranged in the air conditioner 4; the air conditioner 4 is used for sending the information of the exhaust temperature of the compressor, the opening degree of the electronic expansion valve and the frequency of the compressor to the interface server through the wireless communication module 7;
the interface server is used for acquiring information sent by the air conditioner 4 and transmitting the information to the management server 6; the management server 6 determines the opening of the electronic expansion valve and the frequency of the compressor according to the exhaust temperature, and sends the determined opening of the electronic expansion valve and the determined frequency of the compressor to the air conditioner 4 through the interface machine server 5.
Further, the air conditioner 4 encrypts and compresses the compressor exhaust temperature, the electronic expansion valve opening degree and the compressor frequency information, and then sends the encrypted and compressed data to the interface machine server 5 through the wireless communication module 7;
the interface machine server 5 decompresses and decrypts the acquired information of the air conditioner 4, and transmits the decompressed and decrypted data to the management server 6.
Further, the control system further includes:
a storage server 8;
the storage server 8 is connected to the management server 6, and is configured to store the exhaust temperature, the opening degree of the electronic expansion valve, and the compressor frequency information of the air conditioner 4, which are received by the management server 6.
In practical use of the control system described in this embodiment, the air conditioner 4 transmits the collected parameters of the air discharge temperature of the compressor of the air conditioning unit, the opening degree of the electronic expansion valve, the frequency of the compressor, and the like to the interface machine server 5 by installing the wireless communication module 7 (for example, a 4G module). In order to ensure the data security and reduce the transmission flow during transmission, the data sent by the air conditioner 4 is encrypted and compressed, so after receiving the data sent by the air conditioner 4, the interface machine server 5 firstly decompresses and decrypts the data, and then transmits the decompressed and decrypted data to the management server 6. In actual execution, the interface engine server 5 receives data by using message middleware, and a flash component can be used to send the data to a hadoop cluster consisting of the management server 6 and the storage server 8, so that the management server 6 receives the data sent by the interface engine server 5. The management server 6 determines the opening of the electronic expansion valve and the frequency of the compressor according to the exhaust temperature, and sends the determined opening of the electronic expansion valve and the frequency of the compressor to the air conditioner 4 through the interface machine server 5, so that the air conditioner 4 operates according to the adjusted opening of the electronic expansion valve and the adjusted frequency of the compressor; at the same time, the management server 6 stores the data in the storage server 8.
The control system described in this embodiment utilizes big data means, before the compressor exhaust temperature reaches the exhaust high temperature protection threshold, according to the size of compressor exhaust temperature, adjusts the opening of the electronic expansion valve and the compressor frequency, through the opening that increases the electronic expansion valve and reduce the compressor frequency, reduces the compressor exhaust temperature, prevents to influence the performance and the life of compressor, is favorable to guaranteeing the compressor normal work.
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 the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "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 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.
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, 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.
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 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 high-temperature protection control method for exhaust of a compressor is characterized by comprising the following steps:
acquiring the exhaust temperature of a compressor;
judging whether the exhaust temperature of the compressor is normal or not;
and controlling the running state of the compressor according to the judgment result.
2. The compressor discharge high temperature protection control method of claim 1, wherein determining whether the compressor discharge temperature is normal comprises:
if the compressor discharge temperature is within a normal temperature range, the compressor discharge temperature is normal; otherwise, the compressor discharge temperature is abnormal.
3. The method for controlling high-temperature protection of exhaust gas from a compressor according to claim 2, wherein the controlling the operation state of the compressor according to the judgment result comprises:
when the judgment result is that the exhaust temperature of the compressor is normal, controlling the compressor to keep running in the current state;
and when the judgment result is that the exhaust temperature of the compressor is abnormal, adjusting the opening of the electronic expansion valve and the frequency of the compressor according to the exhaust temperature of the compressor.
4. The compressor discharge high temperature protection control method of claim 3, wherein the adjusting the electronic expansion valve opening and the compressor frequency according to the magnitude of the compressor discharge temperature comprises:
when the exhaust temperature of the compressor is in a first preset temperature range, increasing the opening degree of the electronic expansion valve by a first specific value;
when the exhaust temperature of the compressor is in a second preset temperature range, increasing the opening degree of the electronic expansion valve by a second specific value;
when the exhaust temperature of the compressor is in a third preset temperature range, increasing the opening degree of the electronic expansion valve by a second specific value, and simultaneously reducing the frequency of the compressor;
the temperature values in the third preset temperature range are all larger than the temperature values in the second preset temperature range; the temperature values in the second preset temperature range are all larger than the temperature values in the first preset temperature range; the temperature values in the first preset temperature range are all larger than the temperature values in the normal temperature range; the second particular value is greater than the first particular value.
5. The compressor discharge high temperature protection control method of claim 4, further comprising:
when the exhaust temperature of the compressor is greater than the maximum temperature value within the third preset temperature range, controlling the compressor to enter shutdown protection;
and the maximum temperature value in the third preset temperature range is an exhaust high-temperature protection threshold value.
6. The compressor discharge high temperature protection control method according to any one of claims 2 to 5, further comprising:
and when the exhaust temperature of the compressor is lower than the minimum temperature value in the normal temperature range, controlling the compressor to stop and debugging the compressor again.
7. A high-temperature protection control device for exhaust of a compressor is characterized by comprising:
the acquisition module is used for acquiring the exhaust temperature of the compressor;
the judging module is used for judging whether the exhaust temperature of the compressor is normal or not;
and the control module is used for controlling the running state of the compressor according to the judgment result.
8. An air conditioner, comprising:
a compressor, and a compressor discharge high temperature protection control apparatus as claimed in claim 7.
9. A control system, comprising:
the system comprises an air conditioner, an interface machine server and a management server;
the air conditioner is internally provided with a wireless communication module; the air conditioner is used for sending the exhaust temperature of the compressor, the opening of the electronic expansion valve and the frequency information of the compressor to the interface server through the wireless communication module;
the interface server is used for acquiring information sent by the air conditioner and transmitting the information to the management server; and the management server determines the opening degree of the electronic expansion valve and the frequency of the compressor according to the exhaust temperature, and sends the determined opening degree of the electronic expansion valve and the frequency of the compressor to the air conditioner through the interface machine server.
10. The control system of claim 9,
the air conditioner encrypts and compresses the exhaust temperature of the compressor, the opening of the electronic expansion valve and the frequency information of the compressor, and then sends the encrypted and compressed data to the interface server through the wireless communication module;
and the interface machine server decompresses and decrypts the acquired air conditioner information and transmits the decompressed and decrypted data to the management server.
11. The control system according to claim 9 or 10, characterized by further comprising:
a storage server;
and the storage server is connected with the management server and is used for storing the exhaust temperature, the opening of the electronic expansion valve and the frequency information of the compressor of the air conditioner, which are received by the management server.
CN202011434817.1A 2020-12-10 2020-12-10 Compressor exhaust high-temperature protection control method and device, air conditioner and control system Pending CN112665099A (en)

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