CN117906241A - Control method and system capable of prolonging frosting period of air conditioner - Google Patents
Control method and system capable of prolonging frosting period of air conditioner Download PDFInfo
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- CN117906241A CN117906241A CN202311542303.1A CN202311542303A CN117906241A CN 117906241 A CN117906241 A CN 117906241A CN 202311542303 A CN202311542303 A CN 202311542303A CN 117906241 A CN117906241 A CN 117906241A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004378 air conditioning Methods 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 18
- 238000010257 thawing Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 6
- 238000013500 data storage Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000012937 correction Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 230000008531 maintenance mechanism Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 239000003507 refrigerant Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention solves the problems of short frosting period and larger temperature fluctuation in a room and affecting the comfort of a user when an air conditioner heats, and provides a control method and a control system capable of prolonging the frosting period of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control system capable of prolonging the frosting period of an air conditioner.
Background
The existing household air conditioner defrosting is to judge whether defrosting is carried out or not through the external temperature, the external temperature and the air conditioner operation accumulated time: when the air conditioner is operated and accumulated for a certain time, the external temperature and the external temperature parameters are fed back to the main control board, and when the fed back external temperature is lower than a certain value or the difference value between the external temperature and the external temperature is lower than a certain value, the air conditioner enters defrosting. However, how to delay frosting or avoid frosting to improve heating comfort does not have corresponding control logic, so that the household variable frequency heat pump air conditioner in the current industry performs optimization improvement on the low temperature heating capacity and frosting period, and the optimization measures are more that the heat exchange system is upgraded, the heat exchange area is enlarged to improve the low temperature heating capacity and period, or the air injection enthalpy increase or multistage compression is adopted to improve the low temperature heating capacity; all of these measures involve increased costs and are not cost effective. There is a need for an air conditioning operation method or a corresponding air conditioning system that can delay frosting or avoid frosting well by the difference in the temperature change of the outer ring and the outer tube of the air conditioning system.
The invention discloses an air conditioner frost prevention device, which fully utilizes the characteristic of heat exchange in the frost formation initial stage of a unit, prolongs the operation time of the unit, reduces the operation frequency of reverse circulation defrosting, improves the comfort level of indoor personnel by prolonging the frost formation initial stage time and delaying the frost formation speed, and has the defects of only prolonging the initial frost formation time, greatly fluctuating temperature in a room, affecting the comfort of users, having short frost formation period and not purposefully prolonging the whole frost formation period.
Disclosure of Invention
The invention solves the problems of short frosting period, large temperature fluctuation in a room and influence on user comfort when an air conditioner heats, and provides a control method and a control system capable of prolonging the frosting period of the air conditioner.
In order to achieve the above object, the present invention adopts the following technical scheme:
A control method capable of prolonging the frosting period of an air conditioner comprises the following steps:
controlling the air conditioner to start working, and starting a heating mode of the air conditioner to enable the air conditioner to perform heating operation;
Monitoring and collecting pressure data and temperature data of an air conditioning system in real time through an air return pipe, and feeding back the monitoring data to an air conditioner controller unit;
the air conditioner controller unit judges whether the monitoring data meets the preset extended frosting control condition and does not meet the air conditioner defrosting mode entering condition, and the air conditioner controller unit controls to enter the extended frosting control mode;
the air conditioning system enters closed-loop control, and the electronic expansion valve increases the opening by a preset multiple on the basis of the current opening.
The control method further comprises the steps that the air conditioning system controls the electronic expansion valve to adjust the opening, the opening of the electronic expansion valve is maintained to be increased by a preset multiple on the basis of the current opening, the electronic expansion valve works for a preset running time, and the air conditioning system runs stably.
In the invention, under the working condition of heating operation of an air conditioner, outdoor environmental temperature data, pressure data of an air return pipe and temperature data of the air return pipe in the air conditioning system are monitored in real time, meanwhile, pressure and temperature information on the air return pipe are collected and fed back to an air conditioner controller unit, the air conditioner controller unit carries out the judgment of extending frosting control conditions and judging whether entering an air conditioner defrosting mode is achieved, the collected pressure data and temperature data are compared, so that whether an outdoor heat exchanger achieves the critical condition of air conditioner frosting is judged, if the result judges that the frosting condition is achieved, the opening degree of an electronic expansion valve is increased to reduce throttling, and the purpose of extending the frosting period is achieved.
Preferably, the air conditioning system is monitored by an air return pressure switch on an air return pipe in real time; and the return air temperature of the return air pipe is monitored in real time through a return air temperature sensing probe on the return air pipe. According to the invention, the opening of the electronic expansion valve is regulated mainly by monitoring the air return pressure and the air return temperature of the air conditioning system, so that the purpose of prolonging the frosting period is achieved, and the comfort of a user during heating is improved.
Preferably, the opening of the electronic expansion valve is increased by a preset multiple so that the low pressure is greater than the low pressure critical point P, and the value of the low pressure critical point P ranges from 0.5Mpa to 0.6Mpa. In the invention, for many severe cold areas, the air atmospheric pressure is different, the outdoor environment temperature is greatly different, and when the air conditioner is in thermal operation in winter, frosting is fast, and the frosting period is short, so for the situation, the opening of a plurality of preset multiples is flexibly set, namely, the preset opening p of n times is increased on the basis of the current opening of the electronic expansion valve, so that the air conditioner is suitable for various different environments, the efficiency of an air conditioning system is improved, and the frosting time can be effectively prolonged.
Preferably, the extended frosting control conditions are: the monitored low-pressure data is less than or equal to P-delta P, and the monitored return air temperature is less than or equal to T-delta T, wherein delta P refers to a low-pressure fluctuation threshold value, and delta T refers to a return air temperature fluctuation threshold value. The value range of the preset running time of the electronic expansion valve is 40s to 80 s. The value range of the low pressure fluctuation threshold delta P is between 0.05Mpa and 0.1 Mpa; the value range of the return air temperature fluctuation threshold delta T is between 0.5 ℃ and 1 ℃.
In the invention, the value of the low-pressure fluctuation threshold delta P and the return air temperature fluctuation threshold delta T in the air conditioning system are adaptively changed according to the working environment (severe cold area, plateau area and the like) of the air conditioning system, the value adjusting range of delta P is generally between 0.05Mpa and 0.1Mpa, and the value of the low-pressure fluctuation threshold delta P can be set to be 0.2Mpa, so that the test requirements of different models of the air conditioning system can be better carried out; the value adjusting range of the delta T is generally between 0.5 ℃ and 1 ℃, the value of the return air temperature fluctuation threshold delta T can be set to 0.2 ℃, so that the test requirements of different types of air conditioning systems can be better carried out, the value of the low-pressure fluctuation threshold delta P and the return air temperature fluctuation threshold delta T on the return air pipe in the air conditioning system are flexibly set, the fluctuation threshold parameter is confirmed according to the test data of different types of actual requirements on the basis of not affecting the defrosting control logic of the air conditioner, the indoor temperature fluctuation can be effectively reduced, and the comfort of a user is provided.
The control system capable of prolonging the frosting period of the air conditioner comprises an air conditioner controller unit, a low-pressure detection switch unit arranged on an air return pipe and an air return temperature sensing unit arranged in the air return pipe, wherein the air conditioner controller unit is respectively connected with the low-pressure detection switch unit and the air return temperature sensing unit.
The control system also comprises an electronic expansion valve, wherein the electronic expansion valve is connected with the air conditioner controller unit and receives an opening adjusting instruction of the air conditioner controller unit; and the display module is connected with the air conditioner controller unit, and is used for displaying the working mode of the air conditioner in real time and reflecting the temperature data of the muffler in real time.
The air conditioner controller unit comprises a processor, a data storage and an input/output port, wherein the processor is connected with the data storage and used for controlling the data storage of an air conditioner system, and the air return pressure data information monitored on an air return pipe and the air return temperature data information on the air return pipe are stored into the data storage; the processor is also connected with an input/output port, and the processor in the air conditioner controller unit transmits the pressure data monitored by the low-pressure switch detection unit on the air return pipe and the temperature data monitored by the air return temperature sensing unit to the data storage at last under the command of the processor.
The beneficial effects of the invention are as follows: a control method and system capable of prolonging the frosting period of air conditioner features that under the working condition of heating air conditioner, the outdoor ambient temp data, the pressure data and temp data of air returning pipe are monitored in real time, and the pressure and temp information of air returning pipe are collected and fed back to air conditioner controller unit.
Drawings
FIG. 1 is a flow chart of a method for controlling an extended air conditioner frosting cycle according to an embodiment of the present invention;
Fig. 2 is a block diagram of a control system for extending an air conditioner frosting period according to an embodiment of the present invention.
Detailed Description
For the purpose of making the technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application based on the embodiments herein.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In this embodiment, as shown in fig. 1, a control method capable of extending the frosting cycle of an air conditioner includes the following steps:
controlling the air conditioner to start working, and starting a heating mode of the air conditioner to enable the air conditioner to perform heating operation;
Monitoring and collecting pressure data and temperature data of an air conditioning system in real time through an air return pipe, and feeding back the monitoring data to an air conditioner controller unit;
the air conditioner controller unit judges whether the monitoring data meets the preset extended frosting control condition and does not meet the air conditioner defrosting mode entering condition, and the air conditioner controller unit controls to enter the extended frosting control mode;
the air conditioning system enters closed-loop control, and the electronic expansion valve increases the opening by a preset multiple on the basis of the current opening.
The control method further comprises the steps that the air conditioning system controls the electronic expansion valve to adjust the opening, the opening of the electronic expansion valve is maintained to be increased by a preset multiple on the basis of the current opening, the electronic expansion valve works for a preset running time, and the air conditioning system runs stably.
In the invention, under the working condition of heating operation of an air conditioner, outdoor environmental temperature data, pressure data of an air return pipe and temperature data of the air return pipe in the air conditioning system are monitored in real time, meanwhile, pressure and temperature information on the air return pipe are collected and fed back to an air conditioner controller unit, the air conditioner controller unit carries out the judgment of extending frosting control conditions and judging whether entering an air conditioner defrosting mode is achieved, the collected pressure data and temperature data are compared, so that whether an outdoor heat exchanger achieves the critical condition of air conditioner frosting is judged, if the result judges that the frosting condition is achieved, the opening degree of an electronic expansion valve is increased to reduce throttling, and the purpose of extending the frosting period is achieved.
The air conditioning system is monitored by an air return pressure switch on an air return pipe in real time; and the return air temperature of the return air pipe is monitored in real time through a return air temperature sensing probe on the return air pipe. According to the invention, the opening of the electronic expansion valve is regulated mainly by monitoring the air return pressure and the air return temperature of the air conditioning system, so that the purpose of prolonging the frosting period is achieved, and the comfort of a user during heating is improved.
The opening of the electronic expansion valve is increased by a preset multiple, so that the low pressure is larger than the low pressure critical point P, and the value of the low pressure critical point P ranges from 0.5Mpa to 0.6Mpa. In the invention, for many severe cold areas, the air atmospheric pressure is different, the outdoor environment temperature is greatly different, and when the air conditioner is in thermal operation in winter, frosting is fast, and the frosting period is short, so for the situation, the opening of a plurality of preset multiples is flexibly set, namely, the preset opening P of n times is increased on the basis of the current opening of the electronic expansion valve, so that the air conditioner is suitable for various different environments, the efficiency of an air conditioning system is improved, and the frosting time can be effectively prolonged.
The control conditions of the extended frosting are as follows: the monitored low-pressure data is less than or equal to P-delta P, and the monitored return air temperature is less than or equal to T-delta T, wherein delta P refers to a low-pressure fluctuation threshold value, and delta T refers to a return air temperature fluctuation threshold value. The value range of the preset running time of the electronic expansion valve is 40s to 80 s. The value range of the low pressure fluctuation threshold delta P is between 0.05Mpa and 0.1 Mpa; the value range of the return air temperature fluctuation threshold delta T is between 0.5 ℃ and 1 ℃.
In the invention, the value of the low pressure fluctuation threshold delta P and the return air temperature fluctuation threshold delta T in the air conditioning system are adaptively changed according to the working environment (severe cold area, plateau area and the like) of the air conditioning system, the value adjusting range of delta P is generally between 0.05Mpa and 0.1Mpa, and in the embodiment, the value of the low pressure fluctuation threshold delta P can be set to be 0.2Mpa, so that the test requirements of different models of the air conditioning system can be better carried out; the value adjusting range of Δt is generally between 0.5 ℃ and 1 ℃, in this embodiment, the value of the return air temperature fluctuation threshold Δt can be set to 0.2 ℃, so as to better perform test requirements of different models of the air conditioning system.
In this embodiment, as shown in fig. 2, a control system capable of extending the frosting cycle of an air conditioner includes an air conditioner controller unit, a low pressure detection switch unit disposed on an air return pipe, and an air return temperature sensing unit disposed in the air return pipe, where the air conditioner controller unit is connected to the low pressure detection switch unit and the air return temperature sensing unit respectively.
The control system also comprises an electronic expansion valve, wherein the electronic expansion valve is connected with the air conditioner controller unit and receives an opening adjusting instruction of the air conditioner controller unit; and the display module is connected with the air conditioner controller unit, and is used for displaying the working mode of the air conditioner in real time and reflecting the temperature data of the muffler in real time.
The air conditioner controller unit comprises a processor, a data storage and an input/output port, wherein the processor is connected with the data storage and used for controlling the data storage of an air conditioner system, and the air return pressure data information monitored on an air return pipe and the air return temperature data information on the air return pipe are stored into the data storage; the processor is also connected with an input/output port, and the processor in the air conditioner controller unit transmits the pressure data monitored by the low-pressure switch detection unit on the air return pipe and the temperature data monitored by the air return temperature sensing unit to the data storage at last under the command of the processor.
In this embodiment, as shown in fig. 1, specific control steps of the control method capable of extending the frosting cycle of the air conditioner are as follows: the air conditioner works, and a low-temperature heating mode of the air conditioner is started to enable the air conditioner to perform heating operation;
An air return pressure switch on the air return pipe monitors the low pressure of the air conditioning system in real time, an air return temperature sensing probe on the air return pipe monitors the air return temperature of the air return pipe in real time, and meanwhile, monitoring data is fed back to an outdoor control board;
when the low pressure is less than or equal to P-delta P, the return air temperature is less than or equal to T-delta T and the defrosting entering condition is not reached, entering an extended frosting control mode;
at the moment, closed-loop control is carried out, and the electronic expansion valve is +5P (5P is five times of the opening P) on the basis of the current opening;
The opening degree of the electronic expansion valve is adjusted to maintain the preset operation time for 60s (the value range of the preset operation time of the electronic expansion valve is generally 40s-80 s), and the air conditioning system is stably operated.
In this embodiment, the air conditioner controller unit of the control system that can extend the frosting cycle of the air conditioner is further provided with an exit mechanism that extends the frosting cycle control mode. The exit mechanism for the control mode of the extended frosting cycle has the following specific working principle:
When the air conditioning system enters an extended junction double-period control mode and is in a stable running state, an air conditioning controller unit of the air conditioning system receives pressure data and temperature data fed back by monitoring in real time;
The air conditioner controller unit judges the exit mechanism condition of the control mode of the extended frosting period in real time; the exit mechanism conditions are: the monitored low-pressure data is more than or equal to P+delta P, or the monitored return air temperature is more than or equal to T+delta T, or the defrosting condition is reached, and the defrosting mode is entered;
The air conditioner controller unit controls the air conditioning system to exit the extended frosting cycle control mode.
In this embodiment, the air conditioner controller unit of the control system that can lengthen the frosting cycle of the air conditioner is further provided with an operation maintenance mechanism that lengthens the frosting cycle control mode. The operation maintenance mechanism for prolonging the frosting cycle control mode has the following specific working principle: when the air conditioning system enters an extended junction double-period control mode and is in a stable running state, an air conditioning controller unit of the air conditioning system receives pressure data and temperature data fed back by monitoring in real time;
The air conditioner controller unit judges the operation maintenance mechanism condition of the control mode of the extended frosting period in real time; the operation maintenance mechanism conditions are as follows: the low pressure data of which the P-delta P is less than or equal to the monitored low pressure data of which the P+delta P is less than or equal to the monitored return air temperature of which the T-delta T is less than or equal to the monitored return air temperature of which the T+delta T is less than or equal to the monitored return air temperature of which the T-delta T is less than or equal to the monitored return air temperature of which the P-delta P is less than or equal to the monitored return air temperature of which the return air;
the air conditioner controller unit controls the air conditioning system to maintain the operation of the extended frosting cycle control mode.
In this embodiment, as shown in fig. 1, when the low pressure is less than or equal to P- Δp and the return air temperature is less than or equal to T- Δt and the defrost entry condition is not reached in the monitoring feedback data received by the air conditioner controller unit, the electronic expansion valve enters the extended frosting control mode, and continues to increase by 5P on the basis of the current opening until the monitoring feedback data received by the air conditioner controller unit reaches the exit mechanism condition as described above, and exits the extended frosting cycle control mode.
In the embodiment, when the household air conditioner is in heating operation, whether the outdoor heat exchanger is frosted or not has a critical point, and according to the system matching experience, when the low pressure is lower than 0.6Mp and the return air temperature is lower than-2.5 ℃, the outdoor heat exchanger enters a frosted state. So the low pressure critical point P may be set to 0.6Mp, Δp may be set to 0.2Mp, the return air temperature critical point T may be set to-2.5 ℃, and Δt may be set to 0.2 ℃ as described above. Of course, the critical point parameters of different models need to be confirmed according to actual test data.
In this embodiment, the current defrosting conditions of the home air conditioner are generally: the outdoor heat exchanger is provided with an outer coil temperature sensing probe for monitoring the temperature of the outdoor heat exchanger. An outer ring temperature sensing probe is arranged on the air inlet side of the outdoor side heat exchanger and is used for monitoring the outdoor environment temperature. 1. When the temperature of the outer coil pipe is lower than a certain value (such as-3 ℃), defrosting is carried out; or 2, when the temperature difference between the outer coil pipe and the outer ring temperature is smaller than a certain value (such as-6 ℃), defrosting is carried out.
In this embodiment, the initial opening degree of the electronic expansion valve may be set in various manners, specifically, preset or set according to the internal and external environment temperature and the operation frequency. If the initial opening is set according to the internal and external environmental temperature and the operation frequency, the calculation can be performed as follows:
Initial opening = K 0+K1*Tir+K2*Tor+K3*Fcs, where T ir is indoor ambient temperature, T or is outdoor ambient temperature, F cs is initial target frequency; k 0-K3 is the initial opening coefficient of the electronic expansion valve, and is set according to the size of the system. Since a larger frequency requires a larger refrigerant flow rate, the factor of adding the target frequency is considered when defining the initial opening degree. The initial opening degree may be determined by a sum of a preset opening degree, an indoor environment temperature correction opening degree, an outdoor environment temperature correction opening degree, and an initial target frequency correction opening degree, specifically, the indoor environment temperature correction opening degree may be proportional to an indoor environment temperature, the outdoor environment temperature correction opening degree may be proportional to an outdoor environment temperature, and the initial target frequency correction opening degree may be proportional to an initial target frequency.
In the embodiment, under the air conditioner heating working condition, outdoor environment temperature data, pressure data of an air return pipe and temperature data of the air return pipe are monitored in real time, pressure and temperature information on the air return pipe are collected and fed back to an air conditioner controller unit, the air conditioner controller unit carries out the control condition of prolonging frosting, the monitored low-pressure data is less than or equal to P-delta P, the monitored air return temperature is less than or equal to T-delta T, the judgment of entering an air conditioner defrosting mode is carried out, the collected pressure data and the temperature data are compared, so that whether an outdoor heat exchanger reaches the critical condition of air conditioner frosting is judged, if the result judges that the frosting condition is reached, the purpose of prolonging the frosting period is achieved by increasing the opening degree of an electronic expansion valve to reduce throttling, the prolonged frosting period of the air conditioner system is achieved, the indoor temperature fluctuation is reduced, and the comfort of a user during heating is improved.
The frosting state of the outdoor heat exchanger of the system is judged through the low pressure and the return air temperature of the air conditioning system, and the frosting state can also be judged through other parameters, such as the outer pipe temperature, the temperature difference between the outer pipe temperature and the outer pipe temperature, the running current of the air conditioner, the wind pressure and the wind speed of the two sides of the outdoor heat exchanger and the like.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Claims (9)
1. The control method capable of prolonging the frosting period of the air conditioner is characterized by comprising the following steps of:
controlling the air conditioner to start working, and starting a heating mode of the air conditioner to enable the air conditioner to perform heating operation;
Monitoring and collecting pressure data and temperature data of an air conditioning system in real time through an air return pipe, and feeding back the monitoring data to an air conditioner controller unit;
the air conditioner controller unit judges whether the monitoring data meets the preset extended frosting control condition and does not meet the air conditioner defrosting mode entering condition, and the air conditioner controller unit controls to enter the extended frosting control mode;
the air conditioning system enters closed-loop control, and the electronic expansion valve increases the opening by a preset multiple on the basis of the current opening.
2. The control method for prolonging the frosting period of an air conditioner according to claim 1, further comprising the steps of controlling the opening degree of the electronic expansion valve to be adjusted by the air conditioner system, maintaining the opening degree of the electronic expansion valve to be increased by a preset multiple on the basis of the current opening degree, enabling the electronic expansion valve to work for a preset operation time, and enabling the air conditioner system to stably operate.
3. The control method for prolonging the frosting period of an air conditioner according to claim 1, wherein the air conditioning system is monitored by a return air pressure switch on a return air pipe in real time; and the return air temperature of the return air pipe is monitored in real time through a return air temperature sensing probe on the return air pipe.
4. The control method for prolonging the frosting period of an air conditioner according to claim 1 or 2, wherein the opening of the electronic expansion valve is increased by a preset multiple to enable the low pressure to be larger than a low pressure critical point P, and the value of the low pressure critical point P ranges from 0.5Mpa to 0.6Mpa.
5. The control method for prolonging the frosting period of an air conditioner according to claim 1, wherein the control conditions for prolonging the frosting period are as follows: the monitored low-pressure data is less than or equal to P-delta P, and the monitored return air temperature is less than or equal to T-delta T, wherein delta P refers to a low-pressure fluctuation threshold value, and delta T refers to a return air temperature fluctuation threshold value.
6. The control method for prolonging the frosting period of an air conditioner according to claim 2, wherein the preset running time of the electronic expansion valve is within a range of 40s to 80 s.
7. The control method for prolonging the frosting period of an air conditioner according to claim 5, wherein the value range of the low pressure fluctuation threshold delta P is between 0.05Mpa and 0.1 Mpa; the value range of the return air temperature fluctuation threshold delta T is between 0.5 ℃ and 1 ℃.
8. A control system capable of prolonging the frosting period of an air conditioner, which is suitable for the control method capable of prolonging the frosting period of the air conditioner according to any one of claims 1 to 7, and is characterized by comprising an air conditioner controller unit, a low-pressure detection switch unit arranged on an air return pipe and an air return temperature sensing unit arranged in the air return pipe, wherein the air conditioner controller unit is respectively connected with the low-pressure detection switch unit and the air return temperature sensing unit.
9. The control system for extending the frost period of an air conditioner according to claim 8, further comprising an electronic expansion valve connected to the air conditioner controller unit and receiving an opening adjustment command from the air conditioner controller unit; and the display module is connected with the air conditioner controller unit, and is used for displaying the working mode of the air conditioner in real time and reflecting the temperature data of the muffler in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311542303.1A CN117906241A (en) | 2023-11-20 | 2023-11-20 | Control method and system capable of prolonging frosting period of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311542303.1A CN117906241A (en) | 2023-11-20 | 2023-11-20 | Control method and system capable of prolonging frosting period of air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN117906241A true CN117906241A (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311542303.1A Pending CN117906241A (en) | 2023-11-20 | 2023-11-20 | Control method and system capable of prolonging frosting period of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117906241A (en) |
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2023
- 2023-11-20 CN CN202311542303.1A patent/CN117906241A/en active Pending
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