CN115711511A - Thermal fluorination defrosting control method and device and refrigeration equipment - Google Patents
Thermal fluorination defrosting control method and device and refrigeration equipment Download PDFInfo
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- CN115711511A CN115711511A CN202211411057.1A CN202211411057A CN115711511A CN 115711511 A CN115711511 A CN 115711511A CN 202211411057 A CN202211411057 A CN 202211411057A CN 115711511 A CN115711511 A CN 115711511A
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Abstract
The invention discloses a thermal fluorination defrosting control method and device and refrigeration equipment, relates to the field of air conditioners, and solves the problem that in the prior art, a drain pipe is blocked by ice and cannot drain water when defrosting is performed on an evaporator in the pipe by using a refrigerant. The invention discloses a thermal fluorination frost control method, which comprises the following steps: acquiring parameters required for judging whether the refrigeration equipment meets defrosting entry conditions or not; judging whether the refrigeration equipment meets defrosting entry conditions or not, and controlling the four-way valve to be switched to a defrosting mode when the refrigeration equipment meets the defrosting entry conditions; obtaining the temperature of the refrigeration house when T Storage temperature ＞T Preset reservoir temperature 1 When the refrigerator is in a hot-fluorination defrosting mode, the electric heating device in the water pan is controlled to be in a closed state; when T is Storage temperature ≤T Preset reservoir temperature 1 When the water receiving tray is opened, the electric heating device in the water receiving tray is controlled to be openedAnd in the state, the refrigeration equipment enters a hot fluoride frost mode. The method can ensure the smoothness of water drainage of the water receiving tray, and has the advantages of short defrosting time, energy conservation and reduction of temperature fluctuation of the reservoir.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a thermal fluorination defrosting control method and device and refrigeration equipment.
Background
At present, the conventional low-temperature refrigeration house adopts an electric heating defrosting mode to defrost an evaporator of a refrigeration system, namely, electric heating devices are uniformly arranged in the evaporator and a water receiving disc. Because the temperature in the cold storage is low, generally-18 ℃, when the cold storage runs, the surface of the evaporator is in a frosting state, and no condensed water flows out; when the unit reaches the defrosting condition, the electric heating device is started to defrost the evaporator, and defrosting water is discharged through a water discharge port of the water receiving tray. However, defrosting using an electric heating device has at least the following disadvantages: the defrosting time is long, generally about 30 min; (2) The electric heating device in the water collector opens simultaneously with the electric heating device in the evaporimeter, and two electric heating device surface temperature rise simultaneously, when changing the frost water and flow out, the electric heating device in the water collector has opened a period of time, and it is difficult to freeze on the water collector surface to change the frost water this moment, but this kind of mode is because electric heating device opening time overlength in the water collector, and not only the energy consumption is high, leads to the storehouse temperature to rise moreover, and the storehouse temperature is undulant great.
In the prior art, a low-temperature heat fluorine series refrigerating unit is developed, and a high-temperature and high-pressure refrigerant is adopted to defrost an evaporator in a pipe; an electric heating device is arranged in the water receiving tray, and the temperature in the water receiving tray is raised by the electric heating device. When the unit reaches a defrosting condition, the high-temperature and high-pressure refrigerant quickly passes through the evaporator, and the defrosting speed of the evaporator is high, generally about 10 min; the defrosting mode only needs one electric heating device, so that the electric heating time is short, the energy consumption can be reduced, and the storage temperature fluctuation is reduced. However, the electric heating device in the water pan keeps the surface temperature of the water pan consistent with the reservoir temperature (-18 ℃) due to slow temperature rise, and when defrosting water flows down, the surface of the water pan is easy to freeze, so that the drainage pipe is blocked by ice and cannot drain water.
Therefore, improvement of a defrosting mode of a refrigeration house refrigeration system in the prior art is urgently needed.
Disclosure of Invention
One of the purposes of the invention is to provide a thermal fluoride defrosting control method, which solves the technical problem that in the prior art, the water drainage pipe is blocked by ice and cannot drain water when the evaporator is defrosted in the pipe by using a refrigerant. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention discloses a thermal fluorination frost control method, which comprises the following steps:
acquiring parameters required for judging whether the refrigeration equipment meets defrosting entry conditions or not;
judging whether the refrigeration equipment meets defrosting entry conditions or not, controlling the four-way valve to be switched to a defrosting mode when the refrigeration equipment meets the defrosting entry conditions, and closing the compressor after the compressor works for a preset time;
acquiring the temperature of the refrigeration house, comparing the acquired temperature of the refrigeration house with the first preset refrigeration house temperature, and when T is Warehouse temperature ＞T Preset reservoir temperature 1 When the refrigeration equipment is in a hot-fluorination defrosting mode, the electric heating device in the water pan is controlled to be in a closed state, the compressor is started, and the refrigeration equipment enters the hot-fluorination defrosting mode; when T is Storage temperature ≤T Preset reservoir temperature 1 When the refrigeration equipment is in a hot-fluorination defrosting mode, the electric heating device in the water pan is controlled to be in an opening state, and after the water pan is preheated, the compressor is started; wherein, T Storage temperature For real-time temperature, T, of cold storage Preset reservoir temperature 1 The first preset freezer temperature.
According to a preferred embodiment, the method for controlling the electric heating device in the water pan to be in an open state further comprises the following steps:
acquiring the time length of the electric heating device in an opening state;
and comparing the acquired duration of the electric heating device in the starting state with the defrosting preheating duration, and controlling whether the refrigeration equipment enters a hot fluorination defrosting mode or not based on the comparison result.
According to a preferred embodiment, when t Is opened ≥t Defrosting preheating When the temperature is higher than the set temperature, the refrigeration equipment is controlled to enterEntering a hot fluoride frost mode;
when t is Is opened ＜t Defrosting preheating In time, the running time of the electric heating device is controlled to be not less than t Defrosting preheating ；
Wherein, t Is opened The duration of the electric heating device in the on state, t Defrosting preheating The preheating time is required for the water pan.
According to a preferred embodiment, t Defrosting preheating Calculated according to the following formula: t is t Defrosting preheating ＝D 1 －K 1 *T Warehouse temperature Wherein D is 1 A pre-heating time period, K, predetermined for the water-receiving tray 1 Is the preheating proportionality coefficient of the water receiving tray.
According to a preferred embodiment, when t Defrosting preheating ＞t max When t is Defrosting preheating Is taken as value of t max ；
When t is Defrosting preheating ＜t min When t is Defrosting preheating Is taken as t min ；
When t is min ≤t Defrosting preheating ≤t max When t is Defrosting preheating ＝D 1 －K 1 *T Warehouse temperature ；
Wherein, t min Minimum preheating time t required for defrosting of water pan max The maximum preheating time is needed for defrosting the water pan.
According to a preferred embodiment, whether the refrigeration equipment meets the defrosting entry condition is judged by the following steps:
acquiring the temperature of a refrigeration house, the running time of a compressor and the temperature of an evaporator;
and judging whether the refrigeration equipment meets the defrosting entering condition or not based on the acquired temperature of the refrigeration house, the running time of the compressor and the temperature of the evaporator.
According to a preferred embodiment, the defrosting entry conditions of the refrigeration equipment are:
T warehouse temperature ＜T Reservoir temperature preset 2 And t is and t Operation of ≥t Preset of And T is Evaporation of ≤(T Storage temperature －T The preset temperature difference 1 )，
Wherein, T Preset reservoir temperature 2 For a second preset of the freezer temperature, t Operation of The actual time length t of the four-way valve in the defrosting state Preset In order to preset the time length T of the four-way valve in the defrosting state Evaporation with evaporation Is the real-time temperature, T, of the evaporator A predetermined temperature difference of 1 Is a first predetermined temperature difference.
According to a preferred embodiment, after the refrigeration equipment enters the hot defrosting mode, the method further comprises the following steps:
acquiring the temperature of an evaporator, the time length of a four-way valve in a defrosting mode or the temperature of a condenser;
and judging whether the refrigeration equipment meets a defrosting exit condition or not based on the acquired temperature of the evaporator, the time length of the four-way valve in the defrosting state or the temperature of the condenser, and controlling the four-way valve to be switched to a refrigeration mode when the refrigeration equipment meets the defrosting exit condition.
According to a preferred embodiment, the first conditions for the withdrawal of the frost of the refrigeration equipment are: detecting that the temperature of the evaporator satisfies T for a first preset time period Evaporation of ≥T Preset end of defrosting 1 ；
The second defrosting exit condition of the refrigeration equipment is as follows: the actual duration of detecting that the four-way valve is in the defrosting state meets t Operation of ≥t Preset end of defrosting ；
The third defrosting exit condition of the refrigeration equipment is as follows: after the four-way valve is opened for a second preset time, the temperature of the condenser is detected to meet the following conditions for a third preset time: t is Condensation ≥T Preset end of defrosting 2 ；
Wherein, T Evaporation of Is the real-time temperature, T, of the evaporator Preset end of defrosting 1 Is the first predetermined defrosting termination temperature, t Operation of the device The actual time length t of the four-way valve in the defrosting state Preset end of defrosting To predetermine the defrosting end time, T Condensation Is the real-time temperature, T, of the condenser Preset end of defrosting 2 Is the second preset defrosting termination temperature.
According to a preferred embodiment, the defrosting exit condition of the refrigeration equipment is determined in the following order: the first defrosting exit condition of the refrigeration equipment is prior to the second defrosting exit condition of the refrigeration equipment, and the second defrosting exit condition of the refrigeration equipment is prior to the third defrosting exit condition of the refrigeration equipment.
The method for controlling the hot fluoride frost provided by the invention at least has the following beneficial technical effects:
the thermal fluorination frost control method of the invention is used as T Storage temperature ＞T Preset reservoir temperature 1 Meanwhile, the electric heating device does not need to work under the condition, so that the defrosting device has the advantages of short defrosting time, energy conservation and capability of avoiding storage temperature fluctuation compared with a defrosting technology in the prior art; on the other hand, when T Warehouse temperature ≤T Preset reservoir temperature 1 When the refrigerator is started, the electric heater in the water pan is controlled to be in an open state, and the refrigerating equipment enters a hot defrosting mode, namely T Warehouse temperature ≤T Preset reservoir temperature 1 When the defrosting water-collecting tray is used, the water-collecting tray is heated in advance, so that defrosting water which is defrosted by the evaporator and drops into the water-collecting tray is in a non-ice block state, and the smoothness of water drainage of the water-collecting tray is further ensured; meanwhile, only one electric heating device is needed to work under the condition, compared with a defrosting technology using two heaters in the prior art, the electric heating device has the advantages of short defrosting time, energy conservation and reduction of reservoir temperature fluctuation, and compared with the defrosting technology using one electric heating device in the prior art, the electric heating device has the advantage of smooth drainage. The method for controlling the hot fluorination frost solves the technical problem that in the prior art, the evaporator is subjected to in-pipe defrosting by using a refrigerant, and a drain pipe is blocked by ice and cannot drain water.
The second purpose of the invention is to provide a thermal fluorination frost control device.
The invention provides a hot fluoride frost control device, comprising:
an acquisition module: the system is used for acquiring parameters required for judging whether the refrigeration equipment meets defrosting entry conditions or not;
a judgment module: the system is used for judging whether the refrigeration equipment meets defrosting entry conditions or not, controlling the four-way valve to be switched to a defrosting mode when the refrigeration equipment meets the defrosting entry conditions, and closing the compressor after the compressor works for a preset time;
a control module: is used for obtaining the temperature of the refrigeration house, comparing the obtained temperature of the refrigeration house with the first preset refrigeration house temperature, and when T is higher than the first preset refrigeration house temperature Storage temperature ＞T Preset reservoir temperature 1 When the refrigeration device is started, the refrigeration device enters a hot-fluorination defrosting mode; when T is Storage temperature ≤T Preset reservoir temperature 1 When the refrigeration equipment is in a hot-fluorination defrosting mode, the electric heating device in the water pan is controlled to be in an opening state, and after the water pan is preheated, the compressor is started; wherein, T Storage temperature Real-time temperature, T, for cold storage Preset reservoir temperature 1 The first preset freezer temperature.
The hot fluoride frost control device provided by the invention at least has the following beneficial technical effects:
according to the hot fluorination defrosting control device, the hot fluorination defrosting control process can be realized through the acquisition module, the judgment module and the control module, so that the smoothness of water drainage of the water receiving tray can be ensured, and the device also has the advantages of short defrosting time, energy conservation and reduction of temperature fluctuation of a storage.
A third object of the invention is to propose a refrigeration device.
The refrigeration apparatus of the present invention comprises:
one or more memories having executable programs stored thereon;
one or more processors configured to execute the executable program in the memory to implement the steps of the thermal fluoride frost control method according to any of the embodiments of the present invention.
The refrigeration equipment provided by the invention at least has the following beneficial technical effects:
the refrigeration equipment comprises one or more storages and one or more processors, and the steps of the thermal fluorination control method in any technical scheme can be realized through the functions of the storages and the processors, so that the thermal fluorination control process is realized, the smoothness of water drainage of the water receiving tray can be further ensured, and the refrigeration equipment also has the advantages of short defrosting time, energy conservation and reduction of temperature fluctuation of the storage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a preferred embodiment of the thermal defrosting control method of the present invention;
FIG. 2 is a flow chart of another preferred embodiment of the thermal defrosting control method of the present invention;
FIG. 3 is a schematic block diagram of a preferred embodiment of the thermal defrosting control unit of the present invention;
FIG. 4 is a block schematic diagram of a refrigeration unit of the present invention;
FIG. 5 is a first schematic view of a preferred embodiment of the refrigeration assembly of the present invention;
figure 6 is a second schematic view of a preferred embodiment of the refrigeration assembly of the present invention.
In the figure: 101. a water pan; 102. an electric heating device; 103. a compressor; 104. an evaporator; 105. a four-way valve; 106. a condenser; 107. an electronic expansion valve; 108. a water outlet; 201. an acquisition module; 202. a judgment module; 203. a control module; 301. a memory; 302. a processor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method, the device and the refrigeration equipment for controlling the hot fluoride frost according to the present invention will be described in detail with reference to the accompanying drawings 1 to 6 and examples 1 to 3 of the specification.
Example 1
This example describes the thermal defrosting control method of the present invention in detail.
Fig. 1 shows a flow chart of a preferred embodiment of the thermal defrosting control method of the embodiment. As shown in fig. 1, the method for controlling thermal defrosting of this embodiment includes the following steps:
step 1: and acquiring parameters required for judging whether the refrigeration equipment meets defrosting entry conditions.
Step 2: and judging whether the refrigeration equipment meets the defrosting entry condition or not, controlling the four-way valve 105 to switch to a defrosting mode when the refrigeration equipment meets the defrosting entry condition, and turning off the compressor 103 after the compressor works for a preset time.
And step 3: acquiring the temperature of the refrigeration house, comparing the acquired temperature of the refrigeration house with a first preset refrigeration house temperature, and when T is higher than the first preset refrigeration house temperature Warehouse temperature ＞T Preset reservoir temperature 1 When the refrigeration equipment is in a hot defrosting mode, the electric heating device 102 in the water pan 101 is controlled to be in a closed state, the compressor 103 is started, and the refrigeration equipment enters the hot defrosting mode; when T is Storage temperature ≤T Preset reservoir temperature 1 When the refrigeration equipment is in a hot-fluorination defrosting mode, the compressor 103 is started after the electric heating device 102 in the water pan 101 is controlled to be in an open state and the water pan 101 is preheated, and the refrigeration equipment enters the hot-fluorination defrosting mode; wherein, T Storage temperature For real-time temperature, T, of cold storage Preset reservoir temperature 1 The first preset freezer temperature.
Preferably, T Preset reservoir temperature 1 Is 0 ℃. When T is Storage temperature ＞T Preset reservoir temperature 1 When the temperature of the storage is relatively high, the temperature in the water receiving tray 101 is also high, and the defrosting water in the evaporator 104 can drip into the water receiving tray 101 without heating at the moment is in a non-ice-block state; when T is Warehouse temperature ≤T Preset reservoir temperature 1 In this case, the storage temperature is low, the temperature in the drip tray 101 is also low, and the defrosted water that is defrosted by the evaporator 104 and drops into the drip tray 101 may be ice cubes.
The thermal defrosting control method of this embodiment is performed when T Storage temperature ＞T Preset reservoir temperature 1 When it is in use, the control is connected toThe electric heating device 102 in the water pan 101 is in a closed state, the refrigeration equipment enters a hot-fluorination defrosting mode, at the moment, the water pan 101 can also make the defrosting water of the evaporator 104 drip into the water pan 101 in a non-ice-block state without heating, so that the smoothness of drainage of the water pan 101 is ensured, and meanwhile, because the electric heating device 102 does not need to work under the condition, compared with a defrosting technology in the prior art, the electric heating device has the advantages of short defrosting time, energy conservation and capability of avoiding the fluctuation of the storage temperature; on the other hand, when T Storage temperature ≤T Preset reservoir temperature 1 When the refrigerator is started, the electric heating device 102 in the water pan 101 is controlled to be in an open state, and then the refrigerator enters a hot defrosting mode, namely T Warehouse temperature ≤T Preset reservoir temperature 1 When the defrosting water-receiving tray 101 is heated in advance, defrosting water which is defrosted by the evaporator 104 and drops into the defrosting water-receiving tray 101 is in a non-ice block state, and the water drainage smoothness of the defrosting water-receiving tray 101 is further ensured; meanwhile, only one electric heating device 102 is needed to work under the condition, compared with a defrosting technology using two heaters in the prior art, the electric heating device has the advantages of short defrosting time, energy conservation and reduction of reservoir temperature fluctuation, and compared with the defrosting technology using one electric heating device 102 in the prior art, the electric heating device has the advantage of smooth water drainage. That is, the thermal fluoride frost control method of the present embodiment solves the technical problem that the evaporator 104 is defrosted in the pipe by using the refrigerant in the prior art, and the drain pipe is blocked by ice and cannot drain water.
On the other hand, in the step 2, the compressor 103 is closed after working for a preset time (for example, 5 s), so that the refrigerant has enough pressure difference after the butt joint water tray 101 is preheated, and the refrigeration equipment can establish a hot fluoride defrosting mode in time after the butt joint water tray 101 is preheated; meanwhile, the water pan 101 can be prevented from being preheated firstly, the four-way valve 105 is controlled to be switched to a defrosting mode, the refrigerant pressure difference is insufficient, the four-way valve 105 cannot be switched, or refrigeration equipment runs for refrigeration firstly, so that the refrigerant has enough pressure difference, then the defrosting mode runs, the temperature of the water pan 101 is reduced due to the refrigeration process of the refrigeration equipment, heat is generated by the electric heating device 102, the water pan 101 cannot meet the preset temperature, and the reliability of drainage cannot be guaranteed.
According to a preferred embodiment, controlling the electric heating device 102 in the water tray 101 to be in an open state further comprises the following steps:
acquiring the time length of the electric heating device 102 in an on state;
and comparing the acquired duration of the electric heating device 102 in the on state with the defrosting preheating duration, and controlling whether the refrigeration equipment enters a hot defrosting mode or not based on the comparison result.
Preferably, when t is Is opened ≥t Defrosting preheating When the refrigeration equipment is controlled to enter a hot fluorination defrosting mode; when t is Is opened ＜t Defrosting preheating Then, the operation time of the electric heating device 102 is controlled to be not less than t Defrosting preheating (ii) a Wherein, t Is opened The time period for which the electric heating apparatus 102 is in the ON state, t Defrosting preheating The preheating time required for the defrosting pan 101 is as shown in fig. 2. More preferably, t Defrosting preheating The preheating time required for the electric heater 102 is long to make the defrosting water dropped from the evaporator 104 to the water receiving tray 101 in a non-ice state. E.g. t Defrosting preheating Is 3min.
In the thermal fluorination defrosting control method in the preferred technical scheme of this embodiment, by comparing the time length of the electric heating device 102 in the on state with the defrosting preheating time length, it can be ensured that the water receiving tray has enough heating time, so that the defrosting water dripped into the water receiving tray 101 by defrosting the evaporator 104 is in a non-ice state, and the smoothness of water drainage of the water receiving tray 101 can be further ensured.
According to a preferred embodiment, t Defrosting preheating Calculated according to the following formula: t is t Defrosting preheating ＝D 1 －K 1 *T Storage temperature Wherein D is 1 A pre-heating time period, K, for the water pan 101 1 Preheating the proportionality coefficient for the drip tray 101. Specifically, the preheating proportionality coefficient of the water pan 101 can be obtained as follows: firstly, t at different reservoir temperatures is obtained Defrosting preheating Thus obtaining a plurality of groups of test data; then with T Storage temperature As abscissa, with t Defrosting preheating And drawing a standard curve for the ordinate so as to obtain the preheating proportionality coefficient of the water pan 101. In actual operation of the refrigerating apparatus, t Defrosting preheating May be obtained by a pre-stored formula or a stored standard curve.
The thermal fluoride frost control method, t, of the preferred technical scheme of the embodiment Defrosting preheating Calculated according to the following formula: t is t Defrosting preheating ＝D 1 －K 1 *T Warehouse temperature That is, the preheating time required by the water pan 101 is intelligently calculated, so that the drainage reliability of the water pan 101 can be ensured, and the working time of the electric heating device 102 can be shortened as much as possible, thereby reducing the energy consumption of the refrigeration equipment and reducing the temperature fluctuation of the storage.
According to a preferred embodiment, when t Defrosting preheating ＞t max When t is Defrosting preheating Is taken as t max (ii) a When t is Defrosting preheating ＜t min When t is Defrosting preheating Is taken as t min (ii) a When t is min ≤t Defrosting preheating ≤t max When t is Defrosting preheating ＝D 1 －K 1 *T Storage temperature (ii) a Wherein, t min Minimum preheating time, t, required for defrosting of the drip tray 101 max The maximum preheating time required for defrosting the water pan 101 is long. Not limited to this, t is t when a sensor for detecting the temperature of the reservoir fails or the like Defrosting preheating Is taken as value of t max . Preferably, t is max And t min The temperature of the water receiving tray 101 is determined based on the actual use temperature range of the refrigeration house, the power of the electric heating device 102 and other parameters, and the temperature can be actually obtained through testing according to different machine types. For example: when the temperature of the refrigeration house is 0 ℃, the preheating time period required for defrosting the evaporator 104 and dripping defrosting water in the water receiving tray 101 to be in a non-ice block state is t min (ii) a T is the preheating time length required for enabling the defrosting water which is used for defrosting the evaporator 104 and drops into the water pan 101 and is measured under the lowest use working condition of the refrigeration equipment to be in a non-ice block state max 。
In the method for controlling thermal fluorination frost according to the preferred embodiment of the present invention, t obtained by calculation is used Defrosting preheating And t max And t min Compared with the prior art, the working time of the electric heating device 102 can be further shortened while the drainage reliability of the water receiving tray 101 is further ensured, so that the energy consumption of the refrigeration equipment is further reducedAnd reducing reservoir temperature fluctuations.
According to a preferred embodiment, whether the refrigeration equipment meets the defrosting entry condition is judged by the following steps: acquiring the temperature of a refrigeration house, the running time of a compressor 103 and the temperature of an evaporator 104; and judging whether the refrigeration equipment meets defrosting entering conditions or not based on the acquired temperature of the refrigeration house, the running time of the compressor 103 and the temperature of the evaporator 104.
Preferably, the defrosting entry conditions of the refrigeration equipment are as follows: t is Storage temperature ＜T Preset reservoir temperature 2 And t is Operation of ≥t Preset of And T is Evaporation of ≤(T Storage temperature －T The preset temperature difference 1 ) Wherein, T Storage temperature Real-time temperature, T, for cold storage Preset reservoir temperature 2 For a second preset of the freezer temperature, t Operation of the device The actual time period, t, that the four-way valve 105 is in the defrosting state Preset To preset the length of time that the four-way valve 105 is in the defrost state, T Evaporation of Is the real-time temperature, T, of the evaporator 104 A predetermined temperature difference of 1 Is a first predetermined temperature difference. More preferably, T Reservoir temperature preset 2 Is 10 to 15 ℃; t is t Preset of Is 3min; t is Evaporation with evaporation The tube temperature of the evaporator 104; t is a unit of A predetermined temperature difference of 1 The difference between the reservoir temperature and the evaporator 104 tube temperature is 10-16 ℃ when the evaporator frosts. When T is Warehouse temperature ＞T Reservoir temperature preset 2 In time, the evaporator 104 does not produce a frosting condition, and therefore defrosting is not required; when t is Operation of ＜t Preset of In the process, the working time of the four-way valve 105 is too short, the pressure difference of a refrigerant is low, and the reversing is difficult to realize, so that the defrosting cannot be carried out through hot fluorine; when T is Evaporation of ＞T Storage temperature －T The preset temperature difference 1 While the difference between the reservoir temperature and the evaporator 104 tube temperature is less than T The preset temperature difference 1 The evaporator 104 has a surface that is frosted to the extent that defrosting is not desired, and therefore, defrosting is not required.
The method for controlling hot fluoride frost in the preferred technical scheme of the embodiment passes through T Storage temperature ＜T Reservoir temperature preset 2 And t is and t Operation of the device ≥t Preset And T is Evaporation with evaporation ≤T Storage temperature －T A predetermined temperature difference of 1 Three conditions determine defrosting of refrigerating equipmentIn this condition, it is ensured that the evaporator 104 has a sufficient amount of frost formation, and also that the reliability of defrosting is ensured, so as to avoid frequent start-up of the defrosting process.
According to a preferred embodiment, after the refrigeration equipment enters the hot defrosting mode, the method further comprises the following steps: acquiring the temperature of the evaporator 104, the time period for which the four-way valve 105 is in the defrosting mode, or the temperature of the condenser 106; whether the refrigeration equipment meets the defrosting exit condition is judged based on the acquired temperature of the evaporator 104, the duration of the four-way valve 105 in the defrosting state or the temperature of the condenser 106, and when the refrigeration equipment meets the defrosting exit condition, the four-way valve 105 is controlled to be switched to the refrigeration mode, as shown in fig. 2.
Preferably, the first frost removal condition of the refrigeration equipment is as follows: detecting that the temperature of the evaporator 104 satisfies T for a first predetermined duration Evaporation with evaporation ≥T Preset end of defrosting 1 (ii) a The second defrosting exiting condition of the refrigeration equipment is as follows: the actual time length for detecting that the four-way valve 105 is in the defrosting state meets t Operation of ≥t Preset end of defrosting (ii) a The third defrosting exit condition of the refrigeration equipment is as follows: after the four-way valve 105 is opened for a second preset time period, the temperature of the condenser 106 is detected to meet the following conditions continuously for a third preset time period: t is Condensation ≥T Preset end of defrosting 2 (ii) a Wherein, T Evaporation with evaporation Is the real-time temperature, T, of the evaporator 104 Preset end of defrosting 1 Is the first predetermined defrosting termination temperature, t Operation of the device The actual time period, t, that the four-way valve 105 is in the defrosting state Preset end of defrosting To predetermine the defrosting end time, T Condensation Is the real time temperature, T, of the condenser 106 Preset end of defrosting 2 Is the second preset defrosting termination temperature. Specifically, T Preset end of defrosting 1 The preset temperature, T, for complete defrosting of the evaporator 104 can be determined experimentally Preset end of defrosting 1 For example, 15 to 22 ℃; t is t Preset end of defrosting The preset time period for the evaporator 104 to achieve complete defrosting can be experimentally measured as t Preset end of defrosting Is 15min; t is a unit of Preset end of defrosting 2 The actual occurrence of the protection state of the condenser 106 is experimentally determined for a predetermined critical temperature at which the protection state of the condenser 106 occursThe critical temperature is 65 ℃ and T Preset end of defrosting 2 May be set to 62 deg.c.
More preferably, the first frost exit condition of the refrigeration apparatus is prior to the second frost exit condition of the refrigeration apparatus, and the second frost exit condition of the refrigeration apparatus is prior to the third frost exit condition of the refrigeration apparatus.
According to the hot fluorination defrosting control method in the preferred technical scheme, a plurality of defrosting exit conditions are set, and the defrosting exit conditions are executed in sequence according to the priority, so that the reliability of defrosting can be ensured, and the advantages of saving energy and reducing storage temperature fluctuation are achieved.
Example 2
This example will explain the thermal fluorination frost control apparatus of the present invention in detail.
The thermal fluoride frost control apparatus of the present embodiment includes an obtaining module 201, a determining module 202, and a control module 203, as shown in fig. 3. Preferably, the obtaining module 201: the system is used for acquiring parameters required for judging whether the refrigeration equipment meets defrosting entry conditions or not; a judging module 202: the defrosting control system is used for judging whether the refrigeration equipment meets defrosting entry conditions or not, controlling the four-way valve 105 to switch to a defrosting mode when the refrigeration equipment meets the defrosting entry conditions, and turning off the compressor 103 after the compressor works for a preset time; the control module 203: is used for obtaining the temperature of the refrigeration house, comparing the obtained temperature of the refrigeration house with the first preset refrigeration house temperature, and when T is higher than the first preset refrigeration house temperature Warehouse temperature ＞T Preset reservoir temperature 1 When the water receiving tray 101 is in a closed state, the electric heating device 102 in the water receiving tray is controlled, the compressor 103 is started, and the refrigeration equipment enters a hot fluoride frost melting mode; when T is Storage temperature ≤T Preset reservoir temperature 1 When the refrigeration equipment is in a hot-fluorination defrosting mode, the compressor 103 is started after the electric heating device 102 in the water pan 101 is controlled to be in an open state and the water pan 101 is preheated, and the refrigeration equipment enters the hot-fluorination defrosting mode; wherein, T Storage temperature Real-time temperature, T, for cold storage Preset reservoir temperature 1 The first preset freezer temperature. More preferably, the parameters acquired by the acquiring module 201, the determination conditions of the determining module 202, and the control method of the controlling module 203 are all as shown in embodiment 1.
The hot fluorination frost control device of this embodiment can realize hot fluorination frost control process through obtaining module 201, judging module 202 and control module 203 to can guarantee the smooth and easy nature of water collector drainage, still have the advantage that the time of defrosting is short, energy-conservation and reduction storehouse temperature is undulant simultaneously.
Example 3
This example describes the refrigeration apparatus of the present invention in detail.
The refrigeration apparatus of the present embodiment includes one or more memories 301 and one or more processors 302, as shown in fig. 4. Preferably, one or more memories 301 having executable programs stored thereon; one or more processors 302, configured to execute the executable program in the memory 301, so as to implement the steps of the thermal defrosting control method according to any one of the embodiments 1.
The refrigeration device of this embodiment is, for example, a refrigeration system for a cold storage, and an air outlet of the compressor 103, the four-way valve 105, the condenser 106, the electronic expansion valve 107, the evaporator 104, and an air return opening of the compressor 103 are sequentially connected and constitute a refrigeration assembly for refrigerating and providing cold air for the cold storage, as shown in fig. 6. As shown in fig. 5 and 6, a drip tray 101 is provided below the evaporator 104, and an electric heater 102 and a drain port 108 are provided in the drip tray 101. As shown in fig. 5, the evaporator 104 is installed in the refrigerator, and the condenser 106 is installed outside the refrigerator.
The refrigeration equipment of the embodiment comprises one or more storages 301 and one or more processors 302, and the steps of the thermal defrosting control method in any technical scheme in the embodiment 1 can be realized through the functions of the storages 301 and the processors 302, so that the thermal defrosting control process is realized, the smoothness of water drainage of the water receiving tray can be further ensured, and the refrigeration equipment also has the advantages of short defrosting time, energy conservation and reduction of storage temperature fluctuation.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, the meaning of "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, and further, as used herein, connected may include wirelessly connected; the term "and/or" is used to include any and all combinations of one or more of the associated listed items.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. A thermal fluorination frost control method is characterized by comprising the following steps:
acquiring parameters required for judging whether the refrigeration equipment meets defrosting entry conditions or not;
judging whether the refrigeration equipment meets a defrosting entry condition or not, controlling the four-way valve (105) to be switched to a defrosting mode when the refrigeration equipment meets the defrosting entry condition, and closing the compressor (103) after working for a preset time;
acquiring the temperature of the refrigeration house, comparing the acquired temperature of the refrigeration house with a first preset refrigeration house temperature, and when T is higher than the first preset refrigeration house temperature Storage temperature ＞T Preset reservoir temperature 1 When the refrigerator is started, the electric heating device (102) in the water pan (101) is controlled to be in a closed state, the compressor (103) is started, and the refrigeration equipment enters a hot fluoride defrosting mode; when T is Storage temperature ≤T Preset reservoir temperature 1 When the refrigeration device is started, the electric heating device (102) in the water pan (101) is controlled to be in an opening state, the water pan (101) is preheated, the compressor (103) is started, and the refrigeration device enters a hot fluoride frost melting mode;
wherein, T Storage temperature For real-time temperature, T, of cold storage Preset reservoir temperature 1 The first preset freezer temperature.
2. A method as claimed in claim 1, wherein the method comprises the steps of controlling an electric heater (102) in a water-receiving tray (101) to be in an on state, and:
acquiring the time length of the electric heating device (102) in an opening state;
and comparing the acquired time length of the electric heating device (102) in the on state with the defrosting preheating time length, and controlling whether the refrigeration equipment enters a hot defrosting fluoride mode or not based on the comparison result.
3. The method of claim 2, wherein when t is reached Is opened ≥t Defrosting preheating When the temperature is higher than the set temperature, controlling the refrigeration equipment to enter a hot fluorination defrosting mode;
when t is Is opened ＜t Defrosting preheating When the time is long, the running time of the electric heating device (102) is controlled to be not less than t Defrosting preheating ；
Wherein, t Is opened The time period for which the electric heating device (102) is in the on state, t Defrosting preheating The preheating time is required for the water receiving tray (101).
4. The thermal fluoride frost control method of claim 3,t defrosting preheating Calculated according to the following formula: t is t Defrosting preheating ＝D 1 －K 1 *T Warehouse temperature Wherein D is 1 A preset preheating time length K for the water pan (101) 1 The preheating proportionality coefficient of the water receiving tray (101).
5. The method of claim 4, wherein when t is reached Defrosting preheating ＞t max When t is Defrosting preheating Is taken as t max ；
When t is Defrosting preheating ＜t min When t is Defrosting preheating Is taken as value of t min ；
When t is min ≤t Defrosting preheating ≤t max When t is Defrosting preheating ＝D 1 －K 1 *T Storage temperature ；
Wherein, t min Minimum preheating time t required for defrosting of the water pan (101) max The maximum preheating time is needed for defrosting of the water pan (101).
6. The thermal fluorination frost control method of claim 1, wherein it is determined whether the refrigeration equipment meets the defrosting entry condition by:
acquiring the temperature of a refrigeration house, the running time of a compressor (103) and the temperature of an evaporator (104);
and judging whether the refrigeration equipment meets defrosting entering conditions or not based on the acquired temperature of the refrigeration house, the running time of the compressor (103) and the temperature of the evaporator (104).
7. The thermal fluoride frost control method of claim 6, wherein the frost entering conditions of the refrigeration equipment are as follows:
T warehouse temperature ＜T Reservoir temperature preset 2 And t is and t Operation of ≥t Preset of And T is Evaporation with evaporation ≤(T Warehouse temperature －T The preset temperature difference 1 )，
Wherein, T Preset reservoir temperature 2 For a second preset of the freezer temperature, t Operation of the device Is fourActual duration of time that the valve (105) is in the defrost state, t Preset In order to preset the time length T of the four-way valve (105) in the defrosting state Evaporation with evaporation Is the real-time temperature, T, of the evaporator (104) The preset temperature difference 1 Is a first predetermined temperature difference.
8. The method for controlling hot defrosting according to any one of the claims 1 to 7, characterized in that after the refrigeration equipment enters the hot defrosting mode, the method further comprises the following steps:
acquiring the temperature of an evaporator (104), the time length of a four-way valve (105) in a defrosting mode or the temperature of a condenser (106);
whether the refrigeration equipment meets a defrosting exit condition is judged based on the acquired temperature of the evaporator (104), the duration of the four-way valve (105) in a defrosting state or the temperature of the condenser (106), and when the refrigeration equipment meets the defrosting exit condition, the four-way valve (105) is controlled to be switched to a refrigeration mode.
9. The thermal fluoride frost control method of claim 8, wherein the first frost exit condition of the refrigeration apparatus is: detecting that the temperature of the evaporator (104) satisfies T for a first predetermined duration Evaporation with evaporation ≥T Preset end of defrosting 1 ；
The second defrosting exiting condition of the refrigeration equipment is as follows: the actual time length for detecting that the four-way valve (105) is in the defrosting state meets t Operation of the device ≥t Preset end of defrosting ；
The third defrosting exit condition of the refrigeration equipment is as follows: after the four-way valve (105) is opened for a second preset time, continuously detecting that the temperature of the condenser (106) meets the following conditions for a third preset time: t is Condensation ≥T Preset end of defrosting 2 ；
Wherein, T Evaporation with evaporation Is the real-time temperature, T, of the evaporator (104) Preset end of defrosting 1 Is the first predetermined defrosting termination temperature, t Operation of the device The actual time length t of the four-way valve (105) in the defrosting state Preset end of defrosting For presetting the defrosting termination time length T Condensation Is the real-time temperature, T, of the condenser (106) Preset end of defrosting 2 For second predetermined end of defrostingAnd (3) temperature.
10. The thermal fluoride frost control method of claim 9, wherein the frost removal condition of the refrigerating apparatus is determined in the following order: the first defrosting exiting condition of the refrigeration equipment is prior to the second defrosting exiting condition of the refrigeration equipment, and the second defrosting exiting condition of the refrigeration equipment is prior to the third defrosting exiting condition of the refrigeration equipment.
11. A hot fluoride frost control device is characterized by comprising
An acquisition module (201): the parameter acquiring unit is used for acquiring parameters required for judging whether the refrigeration equipment meets defrosting entry conditions or not;
a judging module (202): the defrosting control system is used for judging whether the refrigeration equipment meets defrosting entry conditions or not, controlling the four-way valve (105) to switch to a defrosting mode when the refrigeration equipment meets the defrosting entry conditions, and closing the compressor (103) after working for a preset time;
a control module (203): is used for obtaining the temperature of the refrigeration house, comparing the obtained temperature of the refrigeration house with the first preset refrigeration house temperature, and when T is higher than the first preset refrigeration house temperature Storage temperature ＞T Preset reservoir temperature 1 When the refrigerator is started, the electric heating device (102) in the water pan (101) is controlled to be in a closed state, the compressor (103) is started, and the refrigeration equipment enters a hot fluoride defrosting mode; when T is Storage temperature ≤T Preset reservoir temperature 1 When the refrigeration equipment is in a hot-fluorination defrosting mode, the electric heating device (102) in the water pan (101) is controlled to be in an opening state, and after the water pan (101) is preheated, the compressor (103) is started; wherein, T Storage temperature For real-time temperature, T, of cold storage Preset reservoir temperature 1 The first preset freezer temperature.
12. A refrigeration apparatus, comprising:
one or more memories (301) having executable programs stored thereon;
one or more processors (302) for executing said executable program in said memory (301) to implement the steps of the thermal fluoride frost control method of any of claims 1 to 10.
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| CN202211411057.1A CN115711511A (en) | 2022-11-11 | 2022-11-11 | Thermal fluorination defrosting control method and device and refrigeration equipment |
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| CN202211411057.1A CN115711511A (en) | 2022-11-11 | 2022-11-11 | Thermal fluorination defrosting control method and device and refrigeration equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387279A (en) * | 2023-12-13 | 2024-01-12 | 珠海格力电器股份有限公司 | Ultralow-temperature refrigeration house, defrosting system of low-temperature refrigeration house and defrosting method |
| CN117387279B (en) * | 2023-12-13 | 2024-04-30 | 珠海格力电器股份有限公司 | Ultralow-temperature refrigeration house, defrosting system of low-temperature refrigeration house and defrosting method |
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- 2022-11-11 CN CN202211411057.1A patent/CN115711511A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387279A (en) * | 2023-12-13 | 2024-01-12 | 珠海格力电器股份有限公司 | Ultralow-temperature refrigeration house, defrosting system of low-temperature refrigeration house and defrosting method |
| CN117387279B (en) * | 2023-12-13 | 2024-04-30 | 珠海格力电器股份有限公司 | Ultralow-temperature refrigeration house, defrosting system of low-temperature refrigeration house and defrosting method |
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