CN117906327A - Refrigerator and method for measuring and calculating ambient humidity of refrigerator - Google Patents
Refrigerator and method for measuring and calculating ambient humidity of refrigerator Download PDFInfo
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- CN117906327A CN117906327A CN202211242443.2A CN202211242443A CN117906327A CN 117906327 A CN117906327 A CN 117906327A CN 202211242443 A CN202211242443 A CN 202211242443A CN 117906327 A CN117906327 A CN 117906327A
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- 238000001704 evaporation Methods 0.000 claims abstract description 91
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- 230000008859 change Effects 0.000 claims abstract description 30
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims description 64
- 230000007613 environmental effect Effects 0.000 claims description 45
- 238000013507 mapping Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 10
- 238000007710 freezing Methods 0.000 description 9
- 230000008014 freezing Effects 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000005494 condensation Effects 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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Abstract
The embodiment of the invention can calculate the ambient humidity according to the evaporation temperature change of an evaporator before and after the refrigerator is opened, does not need to additionally increase a humidity sensor for monitoring the ambient humidity, and saves the time and labor for refrigerator production.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and an environment humidity measuring and calculating method thereof.
Background
With the improvement of refrigerator performance, many scenes need to use the parameter of ambient humidity, for example, because the temperature inside the refrigerator is far lower than the temperature outside the refrigerator body, gas is easy to condense into dew at the part contacted with the refrigerator body and the door body of the refrigerator, the dew phenomenon is generated, and the ambient humidity needs to be acquired to determine the dew point temperature of air in the environment so as to solve the dew point problem based on the dew point temperature. The prior art often additionally sets up humidity sensor at the refrigerator shell for monitoring ambient humidity, has increased the time and the manpower that refrigerator production took, and for example patent application document CN200910017819.8 discloses that the humidity sensor that is used for monitoring ambient humidity has been set up in the box of refrigerator and with outside space intercommunication department.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and an environment humidity measuring and calculating method thereof, which can calculate environment humidity according to the change of the refrigerating performance of an evaporator before and after a refrigerator door is opened, a humidity sensor for monitoring the environment humidity is not required to be additionally arranged, procedures related to the humidity sensor for monitoring the environment humidity are saved in the refrigerator production process, and time and labor consumed by refrigerator production are saved.
To achieve the above object, an embodiment of the present invention provides a refrigerator including:
A compartment is arranged in the box body;
The door body is arranged at the opening of the compartment;
a controller for:
acquiring parameters; the parameters comprise the air quality flowing into the compartment in the current door opening period, the environment temperature in the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the current door closing time;
Substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period; the first preset function formula comprises the following variables: the air quality flowing into the compartment during the door opening, the ambient temperature during the door opening, the steady evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the compartment temperature from the door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the door closing time.
As an improvement of the above-mentioned scheme, the refrigerator further includes an air supply fan for driving the air flow of the compartment;
The controller is also used for controlling the air supply fan to run at a preset fan rotating speed when the door body is detected to be opened.
As an improvement of the above scheme, the controller is further configured to multiply the ambient humidity during the current door opening period by a preset current ambient humidity change coefficient to obtain the ambient humidity in the current door closing state after the current door closing time.
As an improvement of the above solution, the controller is further configured to:
acquiring the ambient temperature in the current door closing state;
and determining the current environmental humidity change coefficient according to the environmental temperature in the current door closing state based on a preset mapping relation between the environmental humidity change coefficient and the environmental temperature.
As an improvement of the above-mentioned scheme, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time is obtained by the following means:
Acquiring the evaporating temperature of the evaporator when the compressor of the refrigerator is stopped recently before the current door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time;
subtracting the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time from the evaporating temperature of the evaporator when the compressor is stopped for the last time before the current door opening time to obtain a stable evaporating temperature difference of the evaporator before the current door opening time and after the current door closing time;
the stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time is calculated by the following modes:
acquiring the evaporating temperature of the evaporator when the compressor is stopped recently before the door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the door closing time;
and subtracting the evaporation temperature of the evaporator when the compressor is stopped for the first time after the door closing time from the evaporation temperature of the evaporator when the compressor is stopped recently before the door opening time to obtain a stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time.
As an improvement of the above-described solution, the air mass flowing into the compartment during the current door opening is obtained by:
Acquiring the air supply flow and the current door opening time of the air supply fan;
and multiplying the air supply flow by the current door opening time to calculate the air mass flowing into the compartment in the current door opening period.
As an improvement of the above scheme, the air supply flow of the air supply fan is calculated by the following method:
and determining the air supply flow of the air supply fan according to the fan rotating speed of the air supply fan.
As an improvement of the scheme, the refrigerator further comprises an ambient temperature sensor, wherein the ambient temperature sensor is arranged on the refrigerator shell, and a temperature probe of the ambient temperature sensor is exposed to the outside of the refrigerator shell and is used for monitoring the ambient temperature.
In order to achieve the above object, an embodiment of the present invention further provides a method for measuring and calculating ambient humidity of a refrigerator, including:
Acquiring parameters; the parameters comprise the air quality flowing into a compartment of the refrigerator during the current door opening period, the environment temperature during the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of a first refrigerating cycle of the compartment, and the refrigerating duration of the first refrigerating cycle of the compartment after the current door closing time;
Substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period; wherein the first preset function formula includes the following variables: the air quality flowing into the compartment during the door opening period, the ambient temperature during the door opening period, the stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the end of the first refrigeration period from the door closing time to the compartment, and the refrigeration duration of the first refrigeration period of the compartment after the door closing time.
As an improvement of the above scheme, the method further comprises:
When the door body of the refrigerator is detected to be opened, the air supply fan is controlled to operate at a preset fan rotating speed.
Compared with the prior art, the refrigerator and the method for measuring and calculating the environmental humidity of the refrigerator, disclosed by the embodiment of the invention, are used for calculating and obtaining the environmental humidity in the current door opening period by acquiring the parameters and substituting the parameters into a first preset function formula; the parameters comprise the air quality flowing into the compartment in the current door opening period, the environment temperature in the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the current door closing time; the first preset function formula includes the following variables: according to the refrigerator and the environment humidity measuring and calculating method thereof, the environment humidity can be calculated according to the change of the refrigerating performance of the evaporators before and after the refrigerator is opened, a humidity sensor for monitoring the environment humidity is not required to be additionally arranged, procedures related to the humidity sensor for monitoring the environment humidity are saved in the refrigerator generating process, time and labor consumed in refrigerator production are saved, and refrigerator cost is reduced.
Drawings
Fig. 1 is a perspective view of a refrigerator provided by an embodiment of the present invention;
fig. 2 is a perspective view of a refrigerator door according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;
fig. 4 is a schematic flow diagram of a refrigerant during refrigeration according to an embodiment of the present invention;
FIG. 5 is a schematic view of air flow during refrigeration according to an embodiment of the present invention;
FIG. 6 is a first workflow diagram of a controller provided by an embodiment of the present invention;
FIG. 7 is a second workflow diagram of a controller provided by an embodiment of the present invention;
FIG. 8 is a third workflow diagram of a controller provided by an embodiment of the present invention;
FIG. 9 is a fourth operational flow diagram of a controller provided by an embodiment of the present invention;
FIG. 10 is a fifth workflow diagram of a controller provided by an embodiment of the present invention;
fig. 11 is a flowchart of a method for measuring and calculating the ambient humidity of a refrigerator according to an embodiment of the present invention.
100 Parts of a box body, 200 parts of a door body, 210 parts of a door body outer shell, 220 parts of a door body inner container, 230 parts of an upper end cover, 240 parts of a lower end cover; 1. the device comprises a compressor, a condenser, a condensing prevention pipe, a drying filter, a pressure reducer, a evaporator, a gas-liquid separator and a gas-liquid separator, wherein the compressor, the condenser, the condensing prevention pipe and the condensing prevention pipe are respectively arranged at the bottom of the compressor, the condensing prevention pipe and the condensing prevention pipe respectively; 11. refrigerating chamber 12, freezing chamber 13, air duct 20, air supply fan.
Detailed Description
In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" or the like may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a perspective view of a refrigerator according to an embodiment of the present invention, the refrigerator according to the present embodiment has an approximately rectangular parallelepiped shape, the refrigerator including a cabinet 100 defining a storage space and a plurality of door bodies 200 provided at openings of the cabinet 100, wherein, referring to fig. 2, the door bodies 200 include a door body case 210 positioned at an outer side of the cabinet 100, a door body case 220 positioned at an inner side of the cabinet 100, an upper end cap 230, a lower end cap 240, and a heat insulation layer positioned between the door body case 210, the door body case 220, the upper end cap 230, and the lower end cap 240; typically, the insulating layer is filled with a foaming material. The case 100 is provided with a chamber including a component storage chamber for placing components in a refrigerator, such as a compressor, etc., and a storage space (compartment) for storing foods, medicines, etc. The refrigerator in the embodiment of the invention comprises a refrigerating system, and referring to a structural schematic diagram of the refrigerating system shown in fig. 3, the refrigerating system is arranged in a component storage cavity and is used for providing power for refrigerating circulation of the refrigerator, and comprises a compressor, an evaporator, a pressure reducer and a condenser; the storage space may be divided into a plurality of storage compartments, which may be configured as a refrigerating compartment, a freezing compartment, and a temperature changing compartment (also referred to as a fresh food compartment) according to the purpose, and the storage compartment of the embodiment of the present invention includes at least one refrigerating compartment in which a refrigerating temperature sensor (not shown) for detecting a refrigerating real-time temperature of the refrigerating compartment is provided. Each storage compartment corresponds to one or more doors, for example, in fig. 1, the upper storage compartment is provided with a double door. The door body can be pivoted at the opening of the box body and can also be opened in a drawer mode, so that drawer type storage is realized.
Referring to fig. 3, fig. 3 is a schematic view showing a structure of a refrigerating system in a refrigerator according to an embodiment of the present invention, the refrigerating system including a compressor 1, a condenser 2, an anti-condensation pipe 3, a dry filter 4, a pressure reducer 5, an evaporator 6, and a gas-liquid separator 7. The working processes of the refrigeration system comprise a compression process, a condensation process, a throttling process and an evaporation process.
Wherein, in connection with fig. 3, the compression process is: when the power line of the refrigerator is inserted and the contact of the temperature controller is connected, the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor 1, compressed into high-temperature and high-pressure overheat gas in the cylinder of the compressor 1 and then discharged to the condenser 2; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas radiates heat through the condenser 2, the temperature is continuously reduced, the refrigerant gas is gradually cooled into normal-temperature and high-pressure saturated steam, the saturated steam is further cooled into saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as condensing temperature, and the pressure of the refrigerant in the whole condensing process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid is filtered by a dry filter 4 to remove moisture and impurities, and then flows into a pressure reducer 5 (such as a capillary tube), throttling and depressurization are carried out through the pressure reducer, and the refrigerant is changed into normal-temperature and low-pressure wet vapor; the evaporation process is as follows: the wet vapor with normal temperature and low pressure starts to absorb heat in the evaporator 6 to vaporize, so that the temperature of the evaporator and the surrounding temperature are reduced, the refrigerant is changed into low-temperature and low-pressure gas, the refrigerant coming out of the evaporator 6 returns to the compressor 1 again after passing through the gas-liquid separator 7, the process is repeated, the heat in the refrigerator is transferred into the air outside the refrigerator, the purpose of refrigeration is achieved, and the flow direction of the refrigerant can be shown in fig. 4.
Referring to fig. 5, the refrigerator further includes an air supply fan 20, the air supply fan 20 makes air continuously enter the fins of the evaporator 6 to perform heat exchange, and meanwhile, the air cooled by the heat absorbed by the evaporator 6 is sent to the refrigerating chamber 11 and the freezing chamber 12 through the air duct 13, so that the air in the storage chamber continuously circulates, and the purpose of reducing the temperature is achieved.
It should be noted that the refrigeration system of the refrigerator according to the embodiment of the present invention is not limited to the single-evaporator refrigeration system described above, but may be a dual-evaporator refrigeration system, which is not limited herein.
Specifically, in the existing variable-frequency refrigerator, an ambient temperature sensor (an ambient temperature sensor) is a necessary temperature sensing component and can be used for monitoring the ambient temperature, and the ambient humidity sensor is not a very spare component, so that the distinction of the ambient humidity for the refrigerator without the ambient humidity sensor is basically impossible, and the refrigerator control strategy cannot be distinguished with respect to different humidities. In order to realize that the environmental humidity can be monitored without using a humidity sensor, the embodiment of the invention takes the frosting speed of the evaporator as a monitoring factor to sense the environmental humidity, the evaporator can be frosted continuously in the refrigerating process of the refrigerator, and the frosting process mainly comprises condensation when high-temperature water vapor carried in the indoor refrigerating cycle process of the refrigerator flows through the evaporator, so that the frosting speed depends on the quantity of the water vapor and the temperature difference between the water vapor and the evaporator, and the water vapor in the refrigerating cycle is basically derived from food and the moisture in the environment, therefore, the frosting quantity of the evaporator can be obviously influenced, and the frosting speed of the evaporator can also react the environmental humidity to a certain extent; when the refrigerator door body is tightly closed, the external environment and the environment in the refrigerator are little in interaction, the influence on the frosting quantity of the evaporator is little, when the refrigerator door body is opened, water vapor in the environment flows into the refrigerator along with air, the frost is gradually formed at the evaporator along with the progress of wind circulation, after the temperature in the refrigerator is stabilized again, the temperature of new air entering the refrigerator is reduced to the temperature in the refrigerator, the humidity is consistent with the environment in the refrigerator, all the carried water vapor is condensed on the evaporator, the influence of the environmental humidity on the frosting quantity is reflected, and the evaporation temperature is changed along with the increase of the frosting quantity, so that the change amplitude of the evaporation temperature can reflect the frosting quantity.
Specifically, the refrigerator further includes a controller (not shown in the drawings), and in the embodiment of the present invention, the controller is used to obtain parameters; the parameters comprise the air quality flowing into the compartment in the current door opening period, the environment temperature in the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the current door closing time; substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period; the first preset function formula comprises the following variables: the air quality flowing into the compartment during the door opening, the ambient temperature during the door opening, the steady evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the compartment temperature from the door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the door closing time.
Referring to fig. 6, fig. 6 is a first workflow diagram of a controller according to an embodiment of the present invention, the controller being configured to perform steps S11 to S13:
S11, setting a first preset function formula, wherein the first preset function formula comprises the following variables: the air mass flowing into the compartment during the door opening, the ambient temperature during the door opening, the steady evaporation temperature difference of the evaporator before and after the door opening time, the compartment temperature from the door closing time to the end of the first cooling cycle of the compartment, and the cooling duration of the first cooling cycle of the compartment after the door closing time, and then proceeds to step S12.
Illustratively, the compartment includes a freezer compartment and a refrigerator compartment, and the first predetermined function formula may be:
f(h1)＝[Ke1f(tR)TRZ/MR+Ke2f(tF)TFZ/MF]*Kenv1*f(te1)f(tenv1)(te2-te1);
Wherein f (h 1) is the ambient humidity during the door opening period, K e1 is the influence coefficient of the evaporation temperature on the refrigeration of the refrigerating chamber, K e2 is the influence coefficient of the evaporation temperature on the refrigeration of the freezing chamber, f (T R) is the refrigeration temperature influence function, f (T F) is the refrigeration temperature influence function, T RZ is the refrigeration duration of the first refrigeration cycle of the refrigerating chamber after the door closing time, T FZ is the refrigeration duration of the first refrigeration cycle of the freezing chamber after the door closing time, M R is the air mass flowing into the refrigerating chamber during the door opening period, M F is the air mass flowing into the freezing chamber during the door opening period, K env1 is the influence coefficient of the ambient temperature on the frosting amount, f (T e1) is the evaporation temperature influence function, and f (T env1) is the ambient temperature influence function during the door opening period; (t e2-te1) represents the steady evaporation temperature difference of the evaporator before the door opening time and after the door closing time, t e1 represents the evaporation temperature of the evaporator when the compressor is stopped recently before the door opening time, and t e2 represents the evaporation temperature of the evaporator when the compressor is stopped for the first time after the door closing time.
S12, acquiring parameters, wherein the parameters comprise air quality flowing into the compartment in the current door opening period, environment temperature in the current door opening period, stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, compartment temperature from the current door closing time to the end of a first refrigerating cycle of the compartment, and refrigerating duration of the first refrigerating cycle of the compartment after the current door closing time, and then entering step S13.
Specifically, the difference in the stable evaporation temperature of the evaporator before the current door opening time and after the current door closing time reflects the change in the evaporation temperature of the evaporator before and after the door opening time, which is related to the moisture in the environment entering the compartment during the door opening, and the period from the current door closing time to the end of the first refrigeration cycle of the compartment is specifically from the time of the last door closing to the end of the first refrigeration cycle of the compartment. The ambient temperature is monitored by a temperature sensor provided to the refrigerator housing.
S13, substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period.
Specifically, since the calculation of the ambient humidity during the door opening needs to take into account the relationship between the evaporation temperature of the evaporator when the compressor is operated to the first stop after the door is closed, the chamber temperature at the end of the first cooling cycle of the chamber after the door is closed, etc., the ambient humidity cannot be calculated instantaneously.
Specifically, in one embodiment, the refrigerator further includes an air supply fan for driving the air flow of the compartment; the controller is further configured to: when the door body is detected to be opened, the air supply fan is controlled to operate at a preset fan rotating speed.
Specifically, in a conventional door opening and closing process, air convection mainly occurs in the air inflow caused by internal and external pressure difference during door opening and in the air inflow caused by convection during door closing, in the rest of door opening time, the air flow is small, and in the actual use process of a user, the phenomenon of repeated door opening in a short time basically does not exist, so that the air quantity introduced during one door opening and closing process is likely to be small, and the water content in the air is not even capable of causing obvious change of the temperature of the evaporator. In this embodiment, the air supply fan in the middle room still keeps running to blow to the outside continuously, meanwhile, as the pressure is reduced due to the blowing out of the air quantity in the air duct, the air return port can suck air from the middle room and further cause the outside air to flow into the middle room, and the inflow air quantity is equal to the blowing out of the air supply fan, so that not only is enough air quantity effectively ensured to flow into the box, but also the air quantity is quantified in a forced convection mode of manufacturing the air supply fan, and the influence of air pressure on the air quantity in the door opening and closing process can be ignored, thereby avoiding the problems of complex calculation formula and low accuracy of natural convection in the aspect of air quantity calculation, reducing the difficulty of calculating the environmental humidity and improving the accuracy of the calculated environmental humidity.
Referring to fig. 7, fig. 7 is a second workflow diagram of a controller according to an embodiment of the present invention, the controller being configured to perform steps S14 to S18:
s14, acquiring the state of the door body, and then entering step S15.
S15, judging whether the door body is in an open state, if so, entering a step S16, and if not, entering other control logic.
S16, controlling the air supply fan to operate at a preset fan rotating speed, and then entering step S17.
S17, acquiring parameters; the parameters include the air quality flowing into the compartment during the current door opening period, the ambient temperature during the current door opening period, the steady evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of the first refrigerating cycle of the compartment, and the refrigerating duration of the first refrigerating cycle of the compartment after the current door closing time, and then step S18 is performed.
S18, substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period; the first preset function formula comprises the following variables: the air quality flowing into the compartment during the door opening, the ambient temperature during the door opening, the steady evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the compartment temperature from the door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the door closing time.
In one embodiment, the controller is further configured to multiply the environmental humidity during the current door opening period by a preset current environmental humidity change coefficient to obtain the environmental humidity in the current door closing state after the current door closing time.
Specifically, the environmental humidity during the door opening period is calculated by the first preset function formula, if the humidity at a certain time (i.e. in the current door closing state) from the last door opening to the next door opening is to be known, only the prediction can be performed, and only the environmental temperature change in a short time is considered in the prediction process, so that the moisture in the air is not additionally precipitated or absorbed.
Referring to fig. 8, fig. 8 is a third workflow diagram of a controller according to an embodiment of the present invention, the controller being configured to perform steps S19 to S22:
S19, acquiring the state of the door body, and then entering step S20.
S20, judging whether the door body is in a closed state, if so, entering a step S21, and if not, entering other control logic.
S21, acquiring the ambient humidity during the current door opening period, and then entering step S22.
S22, multiplying the environmental humidity in the current door opening period by a preset current environmental humidity change coefficient to obtain the environmental humidity in the current door closing state.
For example, the ambient humidity in the current door-closed state is estimated by the following formula:
f(h2)＝Kenv2*f(h1)；
Wherein f (h 2) represents the ambient humidity in the current door closing state, and K env2 represents the current ambient humidity change coefficient, which is actually the ambient humidity change coefficient caused by the fact that the humidity content is unchanged due to the change of the ambient temperature along with the time.
In one embodiment, the controller is further configured to: acquiring the ambient temperature in the current door closing state; and determining the current environmental humidity change coefficient according to the environmental temperature in the current door closing state based on a preset mapping relation between the environmental humidity change coefficient and the environmental temperature.
Specifically, the prediction of the ambient humidity is performed at a certain point in time from the last door closing to the next door opening, and only the case where the ambient temperature changes with time and the moisture content is unchanged is considered.
Referring to fig. 9, fig. 9 is a fourth operation flowchart of the controller according to the embodiment of the present invention, the controller is configured to perform steps S23 to S24:
s23, acquiring the ambient temperature in the current door closing state, and then entering step S24.
S24, determining the current environmental humidity change coefficient according to the environmental temperature in the current door closing state based on a preset mapping relation between the environmental humidity change coefficient and the environmental temperature.
It should be noted that, the mapping relationship between the environmental humidity change coefficient and the environmental temperature can be obtained through a test, and is set by a manufacturer before the refrigerator leaves the factory.
In one embodiment, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time is obtained by:
Acquiring the evaporating temperature of the evaporator when the compressor of the refrigerator is stopped recently before the current door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time;
subtracting the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time from the evaporating temperature of the evaporator when the compressor is stopped for the last time before the current door opening time to obtain a stable evaporating temperature difference of the evaporator before the current door opening time and after the current door closing time;
the stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time is calculated by the following modes:
acquiring the evaporating temperature of the evaporator when the compressor is stopped recently before the door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the door closing time;
and subtracting the evaporation temperature of the evaporator when the compressor is stopped for the first time after the door closing time from the evaporation temperature of the evaporator when the compressor is stopped recently before the door opening time to obtain a stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time.
Specifically, the change of the evaporation temperature of the evaporator can reflect the frosting change of the evaporator, the evaporation temperature when the compressor is stopped is continuously monitored in the operation process of the refrigerator, the evaporation temperature is basically unchanged when the temperature in the refrigerator is stable, and therefore the evaporation temperature of the evaporator when the compressor is stopped last time before the door is opened and the evaporation temperature of the evaporator when the compressor is stopped after the door is closed after the one-round refrigerating cycle is finished (the first stop after the door is closed) are recorded, and the changes of the two evaporation temperatures can reflect the ambient humidity during the door opening. The evaporation temperature is monitored by a temperature sensor provided at the evaporator.
In one embodiment, the mass of air flowing into the compartment during the current door opening is obtained by:
Acquiring the air supply flow and the current door opening time of the air supply fan;
and multiplying the air supply flow by the current door opening time to calculate the air mass flowing into the compartment in the current door opening period.
Referring to fig. 10, fig. 10 is a fifth workflow diagram of a controller according to an embodiment of the present invention, the controller being configured to perform steps S25 to S26:
s25, acquiring the air supply flow and the current door opening time of the air supply fan, and then entering step S26.
And S26, multiplying the air supply flow by the current door opening time to calculate the air mass flowing into the compartment in the current door opening period.
The current door opening time period refers to the latest door opening time period, and assuming that the compartment includes a refrigerating compartment and a freezing compartment, the door opening time periods of the refrigerating compartment and the freezing compartment are T RK and T FK, and the air supply flow rates of the air supply fans during refrigerating of the refrigerating compartment and the freezing compartment are M R and M F, respectively, so as to calculate air masses M R and M F flowing into the compartment, specifically, the following calculation formulas are given:
MR＝TRKmR,MF＝TFKmF。
In one embodiment, the air flow rate of the air blower is calculated by:
and determining the air supply flow of the air supply fan according to the fan rotating speed of the air supply fan.
In one embodiment, the refrigerator further comprises an ambient temperature sensor arranged on the refrigerator shell, and a temperature probe of the ambient temperature sensor is exposed to the outside of the refrigerator shell and used for monitoring the ambient temperature.
In one embodiment, the compartment includes at least one of a refrigerator compartment and a freezer compartment.
Illustratively, assuming that the compartments include a refrigerator compartment and a freezer compartment, the refrigeration system is a single evaporator refrigeration system, one refrigeration cycle of the refrigerator compartment is the period from when the damper of the refrigerator compartment is open to when the damper is closed, and the refrigeration cycle of the freezer compartment is the period from when the compressor is started to when the compressor is stopped.
Compared with the prior art, the refrigerator disclosed by the embodiment of the invention has the advantages that the environmental humidity in the current door opening period is calculated and obtained by acquiring the parameters and substituting the parameters into the first preset function formula; the parameters comprise the air quality flowing into the compartment in the current door opening period, the environment temperature in the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the current door closing time; the first preset function formula includes the following variables: the refrigerator provided by the embodiment of the invention can calculate the ambient humidity according to the change of the evaporating temperature of the evaporator before and after the refrigerator is opened, the parameters can be all obtained by sensing the existing sensor of the refrigerator without adding additional components, the matching performance with the existing machine type is high, the working procedures related to the humidity sensor for monitoring the ambient humidity, such as the installation of the humidity sensor, are saved in the refrigerator generating process, the time and labor for refrigerator production are saved, and the refrigerator cost is reduced.
Referring to fig. 11, fig. 11 is a flowchart of a method for measuring and calculating the ambient humidity of a refrigerator according to an embodiment of the present invention, and a defrosting control method of the refrigerator according to an embodiment of the present invention is implemented by a controller in the refrigerator; the method comprises the following steps:
S1, acquiring parameters; the parameters comprise the air quality flowing into a compartment of the refrigerator during the current door opening period, the environment temperature during the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of a first refrigerating cycle of the compartment, and the refrigerating duration of the first refrigerating cycle of the compartment after the current door closing time;
S2, substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period; wherein the first preset function formula includes the following variables: the air quality flowing into the compartment during the door opening period, the ambient temperature during the door opening period, the stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the end of the first refrigeration period from the door closing time to the compartment, and the refrigeration duration of the first refrigeration period of the compartment after the door closing time.
In one embodiment, the method further comprises:
When the door body of the refrigerator is detected to be opened, the air supply fan is controlled to operate at a preset fan rotating speed.
In one embodiment, the method further comprises:
And after the current door closing time, multiplying the environmental humidity in the current door opening period by a preset current environmental humidity change coefficient to obtain the environmental humidity in the current door closing state.
In one embodiment, the ambient temperature in the current door-closed state is obtained;
and determining the current environmental humidity change coefficient according to the environmental temperature in the current door closing state based on a preset mapping relation between the environmental humidity change coefficient and the environmental temperature.
In one embodiment, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time is obtained by:
Acquiring the evaporating temperature of the evaporator when the compressor of the refrigerator is stopped recently before the current door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time;
subtracting the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time from the evaporating temperature of the evaporator when the compressor is stopped for the last time before the current door opening time to obtain a stable evaporating temperature difference of the evaporator before the current door opening time and after the current door closing time;
the stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time is calculated by the following modes:
acquiring the evaporating temperature of the evaporator when the compressor is stopped recently before the door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the door closing time;
and subtracting the evaporation temperature of the evaporator when the compressor is stopped for the first time after the door closing time from the evaporation temperature of the evaporator when the compressor is stopped recently before the door opening time to obtain a stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time.
In one embodiment, the mass of air flowing into the compartment during the current door opening is obtained by:
Acquiring the air supply flow and the current door opening time of the air supply fan;
and multiplying the air supply flow by the current door opening time to calculate the air mass flowing into the compartment in the current door opening period.
In one embodiment, the air flow rate of the air blower is calculated by:
and determining the air supply flow of the air supply fan according to the fan rotating speed of the air supply fan.
In one embodiment, the refrigerator further comprises an ambient temperature sensor arranged on the refrigerator shell, and a temperature probe of the ambient temperature sensor is exposed to the outside of the refrigerator shell and used for monitoring the ambient temperature.
In one embodiment, the compartment includes at least one of a refrigerator compartment and a freezer compartment.
It should be noted that, the working process of any method for measuring and calculating the ambient humidity of the refrigerator according to the embodiment of the present invention may refer to the specific working process of the controller of the refrigerator in the above embodiment, and will not be described herein.
Compared with the prior art, the method for measuring and calculating the ambient humidity of the refrigerator disclosed by the embodiment of the invention calculates and obtains the ambient humidity in the current door opening period by acquiring the parameters and substituting the parameters into a first preset function formula; the parameters comprise the air quality flowing into the compartment in the current door opening period, the environment temperature in the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the current door closing time; the first preset function formula includes the following variables: the air quality flowing into the compartment during the door opening, the ambient temperature during the door opening, the steady evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the compartment temperature from the door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the door closing time. Therefore, the method for measuring and calculating the environmental humidity of the refrigerator can calculate the environmental humidity according to the change of the evaporating temperature of the evaporator before and after the refrigerator is opened, the parameters are all obtained by sensing the existing sensor of the refrigerator, no additional components are needed to be added, the matching performance with the existing model is high, the working procedures related to the humidity sensor for monitoring the environmental humidity are saved in the refrigerator generating process, the time and labor for refrigerator production are saved, and the refrigerator cost is reduced.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (10)
1. A refrigerator, comprising:
A compartment is arranged in the box body;
The door body is arranged at the opening of the compartment;
a controller for:
acquiring parameters; the parameters comprise the air quality flowing into the compartment in the current door opening period, the environment temperature in the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the current door closing time;
Substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period; the first preset function formula comprises the following variables: the air quality flowing into the compartment during the door opening, the ambient temperature during the door opening, the steady evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the compartment temperature from the door closing time to the end of the first refrigeration cycle of the compartment, and the refrigeration duration of the first refrigeration cycle of the compartment after the door closing time.
2. The refrigerator of claim 1, further comprising an air supply fan for driving air flow of the compartment;
The controller is also used for controlling the air supply fan to run at a preset fan rotating speed when the door body is detected to be opened.
3. The refrigerator as claimed in claim 1, wherein the controller is further configured to multiply the ambient humidity during the current door opening period by a preset current ambient humidity change coefficient to obtain the ambient humidity in the current door closing state after the current door closing time.
4. The refrigerator of claim 3, wherein the controller is further configured to:
acquiring the ambient temperature in the current door closing state;
and determining the current environmental humidity change coefficient according to the environmental temperature in the current door closing state based on a preset mapping relation between the environmental humidity change coefficient and the environmental temperature.
5. The refrigerator of claim 1, wherein the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time is obtained by:
Acquiring the evaporating temperature of the evaporator when the compressor of the refrigerator is stopped recently before the current door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time;
subtracting the evaporating temperature of the evaporator when the compressor is stopped for the first time after the current door closing time from the evaporating temperature of the evaporator when the compressor is stopped for the last time before the current door opening time to obtain a stable evaporating temperature difference of the evaporator before the current door opening time and after the current door closing time;
the stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time is calculated by the following modes:
acquiring the evaporating temperature of the evaporator when the compressor is stopped recently before the door opening time and the evaporating temperature of the evaporator when the compressor is stopped for the first time after the door closing time;
and subtracting the evaporation temperature of the evaporator when the compressor is stopped for the first time after the door closing time from the evaporation temperature of the evaporator when the compressor is stopped recently before the door opening time to obtain a stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time.
6. The refrigerator of claim 2, wherein the mass of air flowing into the compartment during the current door opening is obtained by:
Acquiring the air supply flow and the current door opening time of the air supply fan;
and multiplying the air supply flow by the current door opening time to calculate the air mass flowing into the compartment in the current door opening period.
7. The refrigerator of claim 6, wherein the air flow rate of the air blower is calculated by:
and determining the air supply flow of the air supply fan according to the fan rotating speed of the air supply fan.
8. The refrigerator as claimed in any one of claims 1 to 6, further comprising an ambient temperature sensor provided on the refrigerator housing and having a temperature probe of the ambient temperature sensor exposed to the outside of the refrigerator housing for monitoring an ambient temperature.
9. The method for measuring and calculating the ambient humidity of the refrigerator is characterized by comprising the following steps of:
Acquiring parameters; the parameters comprise the air quality flowing into a compartment of the refrigerator during the current door opening period, the environment temperature during the current door opening period, the stable evaporation temperature difference of the evaporator before the current door opening time and after the current door closing time, the compartment temperature from the current door closing time to the end of a first refrigerating cycle of the compartment, and the refrigerating duration of the first refrigerating cycle of the compartment after the current door closing time;
Substituting the parameters into a first preset function formula, and calculating the ambient humidity in the current door opening period; wherein the first preset function formula includes the following variables: the air quality flowing into the compartment during the door opening period, the ambient temperature during the door opening period, the stable evaporation temperature difference of the evaporator before the door opening time and after the door closing time, the end of the first refrigeration period from the door closing time to the compartment, and the refrigeration duration of the first refrigeration period of the compartment after the door closing time.
10. The method for measuring and calculating the ambient humidity of a refrigerator as claimed in claim 9, further comprising:
When the door body of the refrigerator is detected to be opened, the air supply fan is controlled to operate at a preset fan rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211242443.2A CN117906327A (en) | 2022-10-11 | 2022-10-11 | Refrigerator and method for measuring and calculating ambient humidity of refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211242443.2A CN117906327A (en) | 2022-10-11 | 2022-10-11 | Refrigerator and method for measuring and calculating ambient humidity of refrigerator |
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| Publication Number | Publication Date |
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| CN117906327A true CN117906327A (en) | 2024-04-19 |
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|---|---|---|---|
| CN202211242443.2A Pending CN117906327A (en) | 2022-10-11 | 2022-10-11 | Refrigerator and method for measuring and calculating ambient humidity of refrigerator |
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| Country | Link |
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| CN (1) | CN117906327A (en) |
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2022
- 2022-10-11 CN CN202211242443.2A patent/CN117906327A/en active Pending
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