CN111981734A - Defrosting control method, system and computer readable storage medium - Google Patents
Defrosting control method, system and computer readable storage medium Download PDFInfo
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- CN111981734A CN111981734A CN202010861427.6A CN202010861427A CN111981734A CN 111981734 A CN111981734 A CN 111981734A CN 202010861427 A CN202010861427 A CN 202010861427A CN 111981734 A CN111981734 A CN 111981734A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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Abstract
The invention discloses a defrosting control method, which is applied to a defrosting control system, wherein the defrosting control system comprises: a photosensor, an air source heat pump, and a controller, the photosensor disposed on an exterior surface of the air source heat pump, the method comprising: the controller receives a photoelectric signal value sent by the photoelectric sensor; detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not; and if the photoelectric signal value is greater than or equal to the first preset threshold value, controlling the air source heat pump to enter a defrosting mode. The invention also discloses a defrosting control system and a computer readable storage medium. The invention can accurately judge the defrosting time of the air source heat pump, quickly and accurately defrost the air source heat pump, improve the defrosting accuracy of the air source heat pump and improve the operating efficiency of the air source heat pump.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a defrost control method, a defrost control system, and a computer-readable storage medium.
Background
With the social development and the increasing living standard of people, the air source heat pump is widely applied to the northern heating area. However, when the air-source heat pump is operated for heating in a region with low air temperature and high humidity, when the evaporator temperature is lower than the dew point temperature of the air and lower than 0 ℃, water vapor in the air may frost on the surface of the evaporator. Under the influence of frosting, the heating capacity of the air source heat pump is continuously reduced along with the thickening of a frost layer, the actual operation performance of the air source heat pump is seriously influenced, the heating effect is poor, and the energy consumption is increased.
At present, the defrosting method generally adopts timing defrosting or manual key defrosting. The timing defrosting generally considers the condition of the machine, and unnecessary defrosting action is necessarily generated, so that additional energy consumption is increased. The manual key defrosting requires the user to defrost in time, and increases the burden of the user. The existing defrosting scheme cannot truly reflect the frosting degree of the evaporator, has a large problem in judgment precision, and is likely to generate unnecessary defrosting actions or cannot timely defrost under the condition of serious frosting, so that certain hysteresis exists in the defrosting actions, the operating efficiency of the air conditioner is influenced, the air conditioner cannot always operate under the optimal performance condition, and the use experience of a user is influenced.
Disclosure of Invention
The invention mainly aims to provide a defrosting control method, a defrosting control system and a computer readable storage medium, and aims to accurately judge the defrosting time of an air source heat pump and quickly and accurately defrost the air source heat pump.
In order to achieve the above object, the present invention provides a defrosting control method applied to a defrosting control system, wherein the defrosting control system comprises: the defrosting control method comprises the following steps of:
the controller receives a photoelectric signal value sent by the photoelectric sensor;
detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not;
and if the photoelectric signal value is greater than or equal to the first preset threshold value, controlling the air source heat pump to enter a defrosting mode.
Optionally, the air source heat pump includes a finned tube evaporator, the defrosting control system includes a fin temperature sensor and an environment temperature sensor, the fin temperature sensor is disposed on an outer surface of the finned tube evaporator and is in contact with the finned tube evaporator, the environment temperature sensor is disposed between two fins of the finned tube evaporator, and before the step of controlling the air source heat pump to enter the defrosting mode, the method includes:
the controller is used for independently receiving the ambient temperature sent by the ambient temperature sensor and the fin temperature sent by the fin temperature sensor respectively;
detecting whether the ambient temperature is greater than a first preset temperature threshold value;
if the environment temperature is greater than the first preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a first preset temperature difference threshold value; wherein the ring-fin temperature difference is a temperature difference between the fin temperature and the ambient temperature;
if the ring fin temperature difference is larger than the first preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
Optionally, after the step of detecting whether the ambient temperature is greater than a first preset temperature threshold, the method includes:
if the ambient temperature is less than or equal to the first preset temperature threshold, detecting whether the ambient temperature is greater than a second preset temperature difference threshold;
if the environment temperature is greater than the second preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a second preset temperature difference threshold value;
if the ring fin temperature difference is larger than the second preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
Optionally, after the step of detecting whether the ambient temperature is greater than a second preset temperature difference threshold, the method includes:
if the environment temperature is less than or equal to the second preset temperature threshold, detecting whether the ring fin temperature difference is greater than a third preset temperature difference threshold;
if the ring fin temperature difference is greater than the third preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
Optionally, after the step of controlling the air source heat pump to enter the defrosting mode, the method includes:
and if the temperature difference of the ring fins is smaller than a fourth preset temperature difference threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
Optionally, after the step of controlling the air source heat pump to enter the defrosting mode, the method includes:
and if the photoelectric signal value is smaller than a second preset threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
Optionally, the manner of acquiring the photoelectric signal value of the photoelectric sensor includes:
a photoelectric signal emitter of the photoelectric sensor emits infrared rays;
a photoelectric signal receiver of the photoelectric sensor receives the infrared rays emitted by the photoelectric signal emitter;
the photoelectric sensor determines a photoelectric signal value according to the emitted infrared rays and the received infrared rays.
Optionally, the step of determining, by the photoelectric sensor, a photoelectric signal value according to the emitted infrared ray and the received infrared ray includes:
the photoelectric sensor determines the light transmittance of the infrared rays according to the emitted infrared rays and the received infrared rays;
and determining the photoelectric signal value corresponding to the infrared light transmittance based on the infrared light transmittance and according to the mapping function relationship between the infrared light transmittance and each electric signal.
In addition, to achieve the above object, the present invention also provides a defrost control system including: the defrosting control method comprises the following steps of a photoelectric sensor, an air source heat pump, a controller, a memory, a processor and a defrosting control program which is stored on the memory and can run on the processor, wherein when the defrosting control program is executed by the processor, the steps of the defrosting control method are realized.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having a defrost control program stored thereon, the defrost control program, when executed by a processor, implementing the steps of the defrost control method as described above.
The invention provides a defrosting control method, a defrosting control system and a computer readable storage medium, wherein a controller receives a photoelectric signal value sent by a photoelectric sensor; detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not; and if the photoelectric signal value is greater than or equal to the first preset threshold value, controlling the air source heat pump to enter a defrosting mode. Through the mode, the defrosting time of the air source heat pump can be accurately judged, the air source heat pump can be quickly and accurately defrosted, the defrosting accuracy of the air source heat pump is improved, and the operating efficiency of the air source heat pump is improved.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of the defrost control method of the present invention;
FIG. 3 is a schematic flow chart of a defrosting control method according to a second embodiment of the present invention;
FIG. 4 is a schematic flow chart of a third embodiment of the defrost control method of the present invention;
fig. 5 is a flow chart of a fourth embodiment of the defrosting control method according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: the controller receives a photoelectric signal value sent by the photoelectric sensor; detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not; and if the photoelectric signal value is greater than or equal to the first preset threshold value, controlling the air source heat pump to enter a defrosting mode.
The existing defrosting method generally adopts timing defrosting or manual key defrosting. The timing defrosting generally considers the condition of the machine, and unnecessary defrosting action is necessarily generated, so that additional energy consumption is increased. The manual key defrosting requires the user to defrost in time, and increases the burden of the user. The existing defrosting scheme cannot truly reflect the frosting degree of the evaporator, has a large problem in judgment precision, and is likely to generate unnecessary defrosting actions or cannot timely defrost under the condition of serious frosting, so that certain hysteresis exists in the defrosting actions, the operating efficiency of the air conditioner is influenced, the air conditioner cannot always operate under the optimal performance condition, and the use experience of a user is influenced.
The invention realizes how to accurately judge the defrosting time of the air source heat pump and how to quickly and accurately defrost the air source heat pump.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a PC, and can also be a mobile terminal device with a display function, such as a smart phone, a tablet computer and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Preferably, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when the mobile terminal is stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer and tapping) and the like for recognizing the attitude of the mobile terminal; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a defrost control program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; applied to a defrost control system, the defrost control system comprising: a photosensor disposed on an external surface of the air source heat pump, and a controller, and the processor 1001 may be configured to invoke a defrost control program stored in the memory 1005 and perform the following operations:
the controller receives a photoelectric signal value sent by the photoelectric sensor;
detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not;
and if the photoelectric signal value is greater than or equal to the first preset threshold value, controlling the air source heat pump to enter a defrosting mode.
Further, the air source heat pump includes a finned tube evaporator, the defrosting control system includes a fin temperature sensor and an environment temperature sensor, the fin temperature sensor is disposed on an outer surface of the finned tube evaporator and is in contact with the finned tube evaporator, the environment temperature sensor is disposed between two fins of the finned tube evaporator, and the processor 1001 may call a defrosting control program stored in the memory 1005, and further perform the following operations:
the controller is used for independently receiving the ambient temperature sent by the ambient temperature sensor and the fin temperature sent by the fin temperature sensor respectively;
detecting whether the ambient temperature is greater than a first preset temperature threshold value;
if the environment temperature is greater than the first preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a first preset temperature difference threshold value; wherein the ring-fin temperature difference is a temperature difference between the fin temperature and the ambient temperature;
if the ring fin temperature difference is larger than the first preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
Further, the processor 1001 may call the defrost control program stored in the memory 1005, and also perform the following operations:
if the ambient temperature is less than or equal to the first preset temperature threshold, detecting whether the ambient temperature is greater than a second preset temperature difference threshold;
if the environment temperature is greater than the second preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a second preset temperature difference threshold value;
if the ring fin temperature difference is larger than the second preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
Further, the processor 1001 may call the defrost control program stored in the memory 1005, and also perform the following operations:
if the environment temperature is less than or equal to the second preset temperature threshold, detecting whether the ring fin temperature difference is greater than a third preset temperature difference threshold;
if the ring fin temperature difference is greater than the third preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
Further, the processor 1001 may call the defrost control program stored in the memory 1005, and also perform the following operations:
and if the temperature difference of the ring fins is smaller than a fourth preset temperature difference threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
Further, the processor 1001 may call the defrost control program stored in the memory 1005, and also perform the following operations:
and if the photoelectric signal value is smaller than a second preset threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
Based on the hardware structure, the embodiment of the defrosting control method is provided.
The invention discloses a defrosting control method.
Referring to fig. 2, fig. 2 is a flow chart of a first embodiment of the defrosting control method according to the present invention.
In the embodiment of the invention, the defrosting control method is applied to a defrosting control system, and the defrosting control system comprises: the defrosting control method comprises the following steps of:
step S10, the controller receives the photoelectric signal value sent by the photoelectric sensor;
in this embodiment, in order to defrost the air source heat pump, the photoelectric sensor is disposed on the outer surface of the air source heat pump, the air source heat pump is electrically connected to the controller, and the photoelectric sensor is electrically connected to the controller. The photoelectric sensor acquires photoelectric signal values every preset time, the photoelectric sensor transmits the acquired photoelectric signal values to the controller, and the controller receives the photoelectric signal values transmitted by the photoelectric sensor; the photoelectric sensor comprises a photoelectric signal transmitter and a photoelectric signal receiver, wherein the photoelectric signal transmitter is used for transmitting infrared rays, the photoelectric signal receiver is used for receiving the infrared rays transmitted by the photoelectric signal transmitter, the photoelectric signal sensor compares the infrared rays received by the photoelectric signal receiver with the infrared rays transmitted by the photoelectric signal transmitter (namely the light transmittance of the infrared rays), and converts the comparison value of the infrared rays received by the photoelectric signal receiver with the infrared rays transmitted by the photoelectric signal transmitter into a photoelectric signal value, the unit of the photoelectric signal value is V, when the light transmittance of the infrared rays is 100%, the photoelectric signal value transmitted by the photoelectric sensor is 0V, namely the voltage between the photoelectric signal receiver and the photoelectric signal transmitter is 0V; along with the reduction of the light transmittance of infrared rays, namely the increase of the thickness of a frost layer of the air source heat pump, the value of a photoelectric signal sent by the photoelectric sensor is gradually increased, namely the voltage between the photoelectric signal receiver and the photoelectric signal transmitter is gradually increased; when the light transmittance of infrared rays is 0%, namely the thickness of a frost layer of the air source heat pump reaches the maximum thickness, the photoelectric signal value sent by the photoelectric sensor is 12V, namely the voltage between the photoelectric signal receiver and the photoelectric signal transmitter is 12V; wherein, the photoelectric signal value and the infrared light transmittance are in inverse proportion; as the thickness of the frost layer of the air source heat pump is increased, the loss of the frost layer to infrared rays is larger, namely the transmittance of the infrared rays is reduced along with the increase of the thickness of the frost layer; with the reduction of the light transmittance of the infrared ray, the infrared ray transmitted by the photoelectric signal transmitter is gradually reduced by the photoelectric signal receiver, the obstruction between the photoelectric signal receiver and the photoelectric signal transmitter is gradually increased, the voltage between the photoelectric signal receiver and the photoelectric signal transmitter is gradually increased, and the photoelectric signal value is also gradually increased. Wherein, air source heat pump includes: a finned tube evaporator, a four-way valve and a fan; wherein the photoelectric sensor is arranged on a fin of the finned tube evaporator; because the frosting position of the finned tube evaporator is mainly on the fins of the finned tube evaporator, the photoelectric sensor is arranged on the fins of the finned tube evaporator, and the judgment of obtaining the surface frosting thickness of the finned tube evaporator is better realized. More specifically, the emitter and the receiver of the photoelectric sensor are respectively arranged on two adjacent fins on the fin evaporator and are oppositely arranged, infrared rays emitted by the emitter penetrate through a gap between the two adjacent fins and reach the receiver, the receiver receives the infrared rays, the photoelectric sensor determines a photoelectric signal value according to the emitted infrared rays and the received infrared rays, and the controller receives the photoelectric signal value sent by the photoelectric sensor and controls whether the air source heat pump enters a defrosting mode or not according to the fed back photoelectric signal value.
The method for acquiring the photoelectric signal value of the photoelectric sensor comprises the following steps:
step a1, emitting infrared rays by a photoelectric signal emitter of the photoelectric sensor;
in the present embodiment, in order to determine the photo signal value, the controller controls the photo signal emitter of the photo sensor to emit infrared rays.
A step 2, receiving the infrared ray emitted by the photoelectric signal emitter by the photoelectric signal receiver of the photoelectric sensor;
in this embodiment, after the controller controls the photoelectric signal transmitter of the photoelectric sensor to transmit infrared rays, the controller receives the infrared rays transmitted by the photoelectric signal transmitter and the photoelectric signal receiver of the photoelectric sensor receives the infrared rays transmitted by the photoelectric signal transmitter.
Step a3, the photoelectric sensor determines photoelectric signal value according to the emitted infrared ray and the received infrared ray.
In the present embodiment, after the controller or the photosensor emits infrared rays and receives infrared rays, the controller or the photosensor determines a photoelectric signal value based on the emitted infrared rays and the received infrared rays. As the thickness of the frost layer of the air source heat pump is increased, the loss of the frost layer to infrared rays is larger, namely the transmittance of the infrared rays is reduced along with the increase of the thickness of the frost layer; with the reduction of the infrared light transmittance, the infrared ray transmitted by the photoelectric signal transmitter is gradually reduced by the photoelectric signal receiver, the obstruction between the photoelectric signal receiver and the photoelectric signal transmitter is gradually increased, the voltage between the photoelectric signal receiver and the photoelectric signal transmitter is gradually increased, and the photoelectric signal value is also gradually increased.
Step a3, the photoelectric sensor determining the photoelectric signal value according to the emitted infrared ray and the received infrared ray, may include:
step b1, the photoelectric sensor determines the infrared transmittance according to the emitted infrared and the received infrared;
in the present embodiment, after the controller or the photosensor emits infrared rays and receives infrared rays, the controller or the photosensor determines infrared ray transmittance from the emitted infrared rays and the received infrared rays.
And b2, determining the photoelectric signal value corresponding to the infrared light transmittance based on the infrared light transmittance and according to the mapping function relationship between the infrared light transmittance and each electric signal.
In the present embodiment, after the controller or the photosensor determines the infrared transmittance from the emitted infrared rays and the received infrared rays; the controller or the photoelectric sensor determines a photoelectric signal value corresponding to the infrared light transmittance based on the infrared light transmittance and according to the mapping function relationship between the infrared light transmittance and each electric signal.
Step S20, detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value;
in this embodiment, after receiving the photoelectric signal value sent by the photoelectric sensor, the controller detects whether the photoelectric signal value is greater than or equal to a first preset threshold value. The preset threshold is a value that detects the magnitude of the photoelectric signal value, that is, a ratio between infrared rays received by the photoelectric signal receiver and infrared rays emitted by the photoelectric signal emitter, that is, a transmittance of the detected infrared rays, that is, a voltage between the photoelectric signal receiver and the photoelectric signal emitter, and is a set value, and the preset threshold may be set to 10V or 9V.
And step S30, if the photoelectric signal value is greater than or equal to the first preset threshold, controlling the air source heat pump to enter a defrosting mode.
In this embodiment, after the controller compares the photoelectric signal value with the preset threshold, when the controller determines that the photoelectric signal value is greater than or equal to the first preset threshold, the controller controls the air source heat pump to enter the defrosting mode. The first preset threshold is a threshold for judging that the frosting thickness of the air source heat pump reaches a set thickness, wherein the first preset threshold may be 10V.
When the air source heat pump comprises a four-way valve and a fan, the step of controlling the air source heat pump to enter a defrosting mode comprises the following steps:
step a1, controlling the four-way valve to switch;
in this embodiment, when the controller controls the air source heat pump to enter the defrosting mode, the controller controls the four-way valve to switch, the air source heat pump is switched from the heating mode to the cooling mode, the high-temperature and high-pressure gas refrigerant compressed by the compressor passes through the pipeline channel finned tube evaporator (i.e. the finned heat exchanger), and the high-temperature and high-pressure gas refrigerant melts frost formed on fins on the finned tube evaporator;
and a2, controlling the fan to stop running, and enabling the air source heat pump to enter a defrosting mode.
In this embodiment, after the four-way valve is switched under the control of the controller, the fan is controlled by the controller to stop running, and the air source heat pump enters a defrosting mode. And the influence of the environment on defrosting is reduced by stopping the fan.
After the step S30 controls the air source heat pump to enter the defrosting mode, the method may include:
and b, if the photoelectric signal value is smaller than a second preset threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
In this embodiment, after the controller compares the photoelectric signal value with a preset threshold, when the controller determines that the photoelectric signal value is smaller than a second preset threshold, the controller controls the air source heat pump to enter the heating mode from the defrosting mode. And the second preset threshold is greater than the first preset threshold. The second preset threshold is a value used for judging that the air source heat pump enters the defrosting mode for a period of time and defrosting is finished.
When the air source heat pump includes a four-way valve and a fan, if the photoelectric signal value is equal to a second preset threshold value, the step b of controlling the air source heat pump to enter a heating mode from the defrosting mode may include:
step c1, if the photoelectric signal value is smaller than a second preset threshold value, operating the fan;
in this embodiment, when the controller receives that the photoelectric signal value sent by the photoelectric sensor is equal to the second preset threshold value, the controller controls the fan to operate, and the residual moisture on the fins is blown off by operating the fan. Wherein the second preset threshold may be 0V.
And c2, controlling the four-way valve to switch when the fan runs for a second preset time, and carrying out a heating mode by the air source heat pump.
In this embodiment, when the controller controls the fan to operate for a second preset time period, that is, after the fan blows dry the moisture on the fins, the controller controls the four-way valve to switch to the heating mode, and the air source heat pump enters the heating mode. And the second preset time is the time for blowing the moisture after the frost is melted.
In this embodiment, with the above scheme, the controller receives a photoelectric signal value sent by the photoelectric sensor; detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not; and if the photoelectric signal value is greater than or equal to the first preset threshold value, controlling the air source heat pump to enter a defrosting mode. Therefore, the defrosting time of the air source heat pump can be accurately judged by judging the photoelectric signal value sent by the photoelectric sensor, so that the air source heat pump can be quickly and accurately defrosted, the defrosting accuracy of the air source heat pump is improved, and the operating efficiency of the air source heat pump is improved.
Further, referring to fig. 3, fig. 3 is a flowchart illustrating a defrosting control method according to a second embodiment of the present invention. Based on the above embodiment shown in fig. 2, before the step S30 of controlling the air source heat pump to enter the defrosting mode, the air source heat pump may include a finned tube evaporator, the defrosting control system includes a fin temperature sensor and an environment temperature sensor, the fin temperature sensor is disposed on an outer surface of the finned tube evaporator and is in contact with the finned tube evaporator, and the environment temperature sensor is disposed between two fins of the finned tube evaporator, where the step S30 may include:
step S40, the controller independently receives the ambient temperature sent by the ambient temperature sensor and the fin temperature sent by the fin temperature sensor, respectively;
in the embodiment, in order to further enhance the accuracy of the frosting degree of the air source heat pump, a fin temperature sensor and an environment temperature sensor are arranged on a fin tube evaporator of the air source heat pump, the fin temperature sensor is arranged on the outer surface of the fin tube evaporator and is in contact with the fin tube evaporator, and the fin temperature sensor is used for detecting the temperature of the fin tube evaporator; the environment temperature sensor is arranged between two fins of the finned tube evaporator and is used for detecting the temperature of the environment outside the finned tube evaporator. After the controller judges that the photoelectric signal value is larger than or equal to the preset threshold value, the controller acquires the ambient temperature detected by the ambient temperature sensor, and the controller acquires the fin temperature detected by the fin temperature sensor. The environment temperature is the environment outside the finned tube evaporator; the fin temperature is the temperature of the fins of the finned tube evaporator.
Step S50, detecting whether the environment temperature is larger than a first preset temperature threshold value;
in the embodiment, after the controller acquires the ambient temperature and the temperature of the fins, the controller detects whether the ambient temperature is greater than a first preset temperature threshold value; the first preset temperature threshold is used for detecting whether the environment is in a preset range or not, and the first preset temperature threshold can be set to be-8 ℃.
Step S60, if the environment temperature is greater than the first preset temperature threshold, detecting whether the ring fin temperature difference is greater than a first preset temperature difference threshold; wherein the ring-fin temperature difference is a temperature difference between the fin temperature and the ambient temperature;
in the embodiment, after comparing the ambient temperature with the first preset temperature threshold, the controller detects whether the temperature difference of the fins is greater than the first preset temperature threshold when the ambient temperature is greater than the first preset temperature threshold; the ring-fin temperature difference is a temperature difference value between the fin temperature obtained by the fin temperature sensor and the environment temperature obtained by the environment temperature sensor; wherein the first preset temperature difference threshold may be set to 12 deg.c and the first preset temperature difference threshold may be set to 10 deg.c.
Step S70, if the ring-fin temperature difference is greater than the first preset temperature difference threshold, executing: controlling the air source heat pump to enter a defrosting mode.
In the present embodiment, the controller performs step S30 when the ring-fin temperature difference is greater than the first preset temperature difference threshold after comparing the ring-fin temperature difference with the first preset temperature difference threshold.
After the step S30 controls the air source heat pump to enter the defrosting mode, the method may include:
and d, if the temperature difference of the ring fins is smaller than a fourth preset temperature difference threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
In this embodiment, after the controller controls the air source heat pump to enter the defrosting mode, when the controller determines that the loop-fin temperature difference is smaller than a fourth preset temperature difference threshold, the controller controls the air source heat pump to enter the heating mode from the defrosting mode. Wherein the fourth preset temperature difference threshold is 5 ℃. The fourth preset temperature difference threshold is smaller than the first preset temperature difference threshold, and the fourth preset temperature difference threshold is a value used for judging that the air source heat pump enters the defrosting mode for a period of time and defrosting is completed.
When the air source heat pump includes a four-way valve and a fan, if the temperature difference of the ring fins is smaller than a fourth preset temperature difference threshold value, the step d of controlling the air source heat pump to enter a heating mode from the defrosting mode may include:
d1, operating the fan after the fan stops operating for a first preset time;
in the embodiment, the fan stops running when defrosting is performed, and the fan runs after the fan stops running for a first preset time; residual moisture on the fins is blown off by operating a fan. The first preset time period may be 180s or 170 s.
And d2, controlling the four-way valve to switch when the fan runs for a second preset time, and carrying out a heating mode by the air source heat pump.
In this embodiment, when the controller controls the fan to operate for a second preset time period, that is, after the fan blows dry the moisture on the fins, the controller controls the four-way valve to switch to the heating mode, and the air source heat pump enters the heating mode. And the second preset time is the time for blowing the moisture after the frost is melted.
In this embodiment, with the above scheme, the controller receives a photoelectric signal value sent by the photoelectric sensor; detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not; if the photoelectric signal value is greater than or equal to the first preset threshold value, the controller respectively and independently receives the environment temperature sent by the environment temperature sensor and the fin temperature sent by the fin temperature sensor; detecting whether the ambient temperature is greater than a first preset temperature threshold value; if the environment temperature is greater than the first preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a first preset temperature difference threshold value; wherein the ring-fin temperature difference is a temperature difference between the fin temperature and the ambient temperature; and if the temperature difference of the ring fins is larger than the first preset temperature difference threshold value, controlling the air source heat pump to enter a defrosting mode. Therefore, the accuracy of judgment at the moment of defrosting of the air source heat pump is further improved by judging the photoelectric signal value sent by the photoelectric sensor, judging the ambient temperature and judging the temperature of the fins, so that quick and accurate defrosting of the air source heat pump is realized, the defrosting accuracy of the air source heat pump is improved, and the operating efficiency of the air source heat pump is improved.
Further, referring to fig. 4, fig. 4 is a flow chart of a third embodiment of the defrosting control method according to the present invention. Based on the above-mentioned embodiment shown in fig. 3, after the step S50 detects whether the ambient temperature is greater than the first preset temperature threshold, the method may include:
step S61, if the ambient temperature is less than or equal to the first preset temperature threshold, detecting whether the ambient temperature is greater than a second preset temperature threshold;
in this embodiment, after comparing the ambient temperature with the first preset temperature threshold, the controller detects whether the ambient temperature is greater than a second preset temperature threshold when the ambient temperature is less than or equal to the first preset temperature threshold. Wherein the second preset temperature threshold may be set to-15 ℃. And the second preset temperature threshold is smaller than the first preset temperature threshold.
Step S62, if the environment temperature is greater than a second preset temperature threshold, detecting whether the ring fin temperature difference is greater than a second preset temperature threshold;
in this embodiment, after comparing the ambient temperature with the second preset temperature threshold, the controller detects whether the temperature difference between the fins is greater than the second preset temperature threshold when the ambient temperature is greater than the second preset temperature threshold. Wherein the second preset temperature difference threshold may be set to 10 deg.c and the second preset temperature difference threshold may be set to 9 deg.c. And the second preset temperature difference threshold value is smaller than the first preset temperature difference threshold value.
Step S63, if the ring-fin temperature difference is greater than a second preset temperature difference threshold, executing: controlling the air source heat pump to enter a defrosting mode.
In the present embodiment, the controller performs step S30 when the ring-fin temperature difference is greater than the second preset temperature difference threshold after comparing the ring-fin temperature difference with the second preset temperature difference threshold.
In this embodiment, with the above scheme, the controller receives a photoelectric signal value sent by the photoelectric sensor; detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not; if the photoelectric signal value is larger than or equal to a first preset threshold value, receiving the ambient temperature sent by the ambient temperature sensor, and receiving the fin temperature sent by the fin temperature sensor; detecting whether the ambient temperature is greater than a first preset temperature threshold value; if the ambient temperature is less than or equal to the first preset temperature threshold, detecting whether the ambient temperature is greater than a second preset temperature threshold; if the environment temperature is greater than the second preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a second preset temperature difference threshold value; if the ring fin temperature difference is larger than the second preset temperature difference threshold value; and controlling the air source heat pump to enter a defrosting mode. Therefore, the accuracy of judgment at the moment of defrosting of the air source heat pump is further improved by judging the photoelectric signal value sent by the photoelectric sensor, judging the ambient temperature and judging the temperature of the fins, so that quick and accurate defrosting of the air source heat pump is realized, the defrosting accuracy of the air source heat pump is improved, and the operating efficiency of the air source heat pump is improved.
Further, referring to fig. 5, fig. 5 is a flow chart of a fourth embodiment of the defrosting control method according to the present invention. Based on the above-mentioned embodiment shown in fig. 4, after the step S62 detects whether the ambient temperature is greater than the second preset temperature difference threshold, the method may include:
step S631, if the ambient temperature is less than or equal to the second preset temperature threshold, detecting whether the ring fin temperature difference is greater than a third preset temperature threshold;
in this embodiment, the controller detects whether the temperature difference between the fins is greater than a third preset temperature difference threshold when the ambient temperature is less than or equal to the second preset temperature threshold after comparing the ambient temperature with the second preset temperature threshold. Wherein the third preset temperature difference threshold may be set to 6 deg.c and the third preset temperature difference threshold may be set to 5 deg.c. The third preset temperature difference threshold is smaller than the second preset temperature threshold, and the second preset temperature threshold is smaller than the first preset temperature difference threshold.
Step S632, if the ring-fin temperature difference is greater than the third preset temperature difference threshold, executing: controlling the air source heat pump to enter a defrosting mode.
In the present embodiment, the controller performs step S30 when the ring-fin temperature difference is greater than a third preset temperature difference threshold after comparing the ring-fin temperature difference with the third preset temperature difference threshold.
In this embodiment, with the above scheme, the controller receives a photoelectric signal value sent by the photoelectric sensor; detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not; if the photoelectric signal value is larger than or equal to a first preset threshold value, receiving the ambient temperature sent by the ambient temperature sensor, and receiving the fin temperature sent by the fin temperature sensor; detecting whether the ambient temperature is greater than a first preset temperature threshold value; if the ambient temperature is less than or equal to a first preset temperature threshold, detecting whether the ambient temperature is greater than a second preset temperature difference threshold; if the environment temperature is less than or equal to the second preset temperature threshold, detecting whether the ring fin temperature difference is greater than a third preset temperature difference threshold; and if the temperature difference of the ring fins is larger than the third preset temperature difference threshold value, controlling the air source heat pump to enter a defrosting mode. Therefore, the accuracy of judgment at the moment of defrosting of the air source heat pump is further improved by judging the photoelectric signal value sent by the photoelectric sensor, judging the ambient temperature and judging the temperature of the fins, so that quick and accurate defrosting of the air source heat pump is realized, the defrosting accuracy of the air source heat pump is improved, and the operating efficiency of the air source heat pump is improved.
The invention also provides a defrosting control system.
The defrosting control system of the invention comprises: the defrosting control method comprises the following steps of a photoelectric sensor, an air source heat pump, a controller, a memory, a processor and a defrosting control program which is stored on the memory and can run on the processor, wherein when the defrosting control program is executed by the processor, the steps of the defrosting control method are realized.
The method implemented when the defrosting control program running on the processor is executed can refer to the embodiments of the defrosting control method of the present invention, and details are not described herein.
The invention also provides a computer readable storage medium.
The present computer readable storage medium has stored thereon a defrost control program that, when executed by a processor, implements the steps of the defrost control method described above.
The method implemented when the defrosting control program running on the processor is executed can refer to the embodiments of the defrosting control method of the present invention, and details are not described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A defrost control method, applied to a defrost control system, the defrost control system comprising: the defrosting control method comprises the following steps of:
the controller receives a photoelectric signal value sent by the photoelectric sensor;
detecting whether the photoelectric signal value is greater than or equal to a first preset threshold value or not;
and if the photoelectric signal value is greater than or equal to the first preset threshold value, controlling the air source heat pump to enter a defrosting mode.
2. The defrost control method of claim 1, wherein the air source heat pump includes a finned tube evaporator, the defrost control system includes a fin temperature sensor disposed on an outer surface of the finned tube evaporator and in contact with the finned tube evaporator, and an ambient temperature sensor disposed between two fins of the finned tube evaporator, the step of controlling the air source heat pump to enter a defrost mode comprising, prior to the step of controlling the air source heat pump to enter a defrost mode:
the controller is used for independently receiving the ambient temperature sent by the ambient temperature sensor and the fin temperature sent by the fin temperature sensor respectively;
detecting whether the ambient temperature is greater than a first preset temperature threshold value;
if the environment temperature is greater than the first preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a first preset temperature difference threshold value; wherein the ring-fin temperature difference is a temperature difference between the fin temperature and the ambient temperature;
if the ring fin temperature difference is larger than the first preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
3. The defrost control method of claim 2, said step of detecting whether said ambient temperature is greater than a first preset temperature threshold being followed by:
if the ambient temperature is less than or equal to the first preset temperature threshold, detecting whether the ambient temperature is greater than a second preset temperature threshold;
if the environment temperature is greater than the second preset temperature threshold value, detecting whether the ring fin temperature difference is greater than a second preset temperature difference threshold value;
if the ring fin temperature difference is larger than the second preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
4. The defrost control method of claim 3, said step of detecting whether said ambient temperature is greater than a second preset temperature differential threshold being followed by:
if the environment temperature is less than or equal to the second preset temperature threshold, detecting whether the ring fin temperature difference is greater than a third preset temperature difference threshold;
if the ring fin temperature difference is greater than the third preset temperature difference threshold value, executing: controlling the air source heat pump to enter a defrosting mode.
5. The defrost control method of claim 2, said step of controlling said air source heat pump to enter a defrost mode being followed by the step of:
and if the temperature difference of the ring fins is smaller than a fourth preset temperature difference threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
6. The defrost control method of claim 1, said step of controlling said air source heat pump to enter a defrost mode being followed by the step of:
and if the photoelectric signal value is smaller than a second preset threshold value, controlling the air source heat pump to enter a heating mode from the defrosting mode.
7. The defrost control method of any one of claims 1-6, wherein said photo signal value of said photo sensor is obtained in a manner comprising:
a photoelectric signal emitter of the photoelectric sensor emits infrared rays;
a photoelectric signal receiver of the photoelectric sensor receives the infrared rays emitted by the photoelectric signal emitter;
the photoelectric sensor determines a photoelectric signal value according to the emitted infrared rays and the received infrared rays.
8. The defrost control method of claim 7, wherein said step of determining a photo signal value from the transmitted infrared light and the received infrared light by said photo sensor comprises:
the photoelectric sensor determines the light transmittance of the infrared rays according to the emitted infrared rays and the received infrared rays;
and determining the photoelectric signal value corresponding to the infrared light transmittance based on the infrared light transmittance and according to the mapping function relationship between the infrared light transmittance and each electric signal.
9. A defrost control system, said defrost control system comprising: a photosensor, an air source heat pump, a controller, a memory, a processor, and a defrost control program stored on the memory and running on the processor, the defrost control program when executed by the processor implementing the steps of the defrost control method of any of claims 1-8.
10. A computer-readable storage medium, having a defrost control program stored thereon, which when executed by a processor implements the steps of the defrost control method of any of claims 1-8.
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