CN117628787A - Mechanical air-cooled refrigerator and control method thereof - Google Patents
Mechanical air-cooled refrigerator and control method thereof Download PDFInfo
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- CN117628787A CN117628787A CN202210994458.8A CN202210994458A CN117628787A CN 117628787 A CN117628787 A CN 117628787A CN 202210994458 A CN202210994458 A CN 202210994458A CN 117628787 A CN117628787 A CN 117628787A
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- 238000010257 thawing Methods 0.000 claims description 22
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a mechanical air-cooled refrigerator and a control method thereof. The control method of the invention comprises the following steps: when a compressor and a fan of the mechanical air-cooled refrigerator are in a stop state, acquiring the environmental temperature of an environmental space in which the mechanical air-cooled refrigerator is positioned; setting a target starting point temperature and a target closing point temperature of the refrigerating chamber according to the environmental temperature; the target starting point temperature and the target closing point temperature are positively correlated with the ambient temperature; and controlling the start and stop of the compressor and the fan according to the environment temperature and the relation between the measured temperature in the refrigerating chamber and the target start point temperature and the target stop point temperature. The invention prolongs the operation time of the compressor when the ambient temperature is low, thereby effectively avoiding the problem that the freezing temperature can not meet the freezing requirement when the ambient temperature is low. In addition, the invention does not change the refrigerator structure and does not increase any cost.
Description
Technical Field
The invention relates to a refrigeration technology, in particular to a mechanical air-cooled refrigerator and a control method thereof.
Background
Existing refrigeration temperature-controlled mechanical air-cooled refrigerators generally include a refrigerator compartment, a freezer compartment, an evaporator, a fan, an air duct assembly, a compressor, and the like. When the refrigerator compressor is operated, the fan is operated to bring the cooling capacity of the evaporator to the refrigerating chamber and the freezing chamber to achieve the refrigerating effect. The refrigeration principle of the refrigerator is as follows: the refrigerator control module controls the start and stop of the compressor through the actual temperature of the refrigerating chamber sensed by the temperature sensor in the refrigerating chamber; when the temperature of the sensor of the refrigerating chamber is increased to the temperature of the starting point of the compressor, the compressor is started and the fan is operated; when the temperature of the sensor of the refrigerating chamber is reduced to the temperature of the stop point of the compressor, the compressor is stopped, and the fan stops running.
When the mechanical air-cooled refrigerator is used in winter, the temperature difference between the external environment temperature and the interior of the refrigerating chamber is very small, even the external environment temperature is lower than the required temperature of the refrigerating chamber, under the condition, the compressor can reach the stop point temperature of the compressor only by operating the refrigerating chamber for a very short time, even the refrigerating chamber directly has no refrigerating request, and the refrigerating requirement of the refrigerating chamber can be met due to the external environment temperature. Because the compressor has short running time and even no refrigeration request, the temperature in the refrigerating chamber is only slightly lower than the refrigerating temperature and even the same as the refrigerating temperature, so that the food which needs to be refrigerated by a customer in winter cannot be stored normally, and the normal use of the customer is influenced.
In order to solve the technical problem, in the prior art, a compensation heater is generally added in the refrigerating chamber, and when the ambient temperature is low, the refrigerating chamber is heated to improve the starting rate of the compressor, so that the freezing chamber is ensured to have a low temperature. However, the compensation heater brings additional heat input to the refrigerator, not only increasing the cost of the refrigerator, but also increasing the power consumption of the refrigerator. In the prior art, the starting rate of a compressor is improved when the ambient temperature is low by changing the structure of a refrigerating system of a refrigerator, so that the structure of the refrigerating system is greatly changed, redesign and layout are needed, and the cost is still high.
Disclosure of Invention
It is an object of the present invention to overcome at least one of the drawbacks of the prior art and to provide a control method of a mechanical air-cooled refrigerator capable of effectively extending the operation time of a compressor at a low cost.
It is a further object of the first aspect of the invention to reduce the temperature of the freezer compartment when refrigeration is not required in the refrigerator compartment.
An object of the second aspect of the present invention is to provide a mechanical air-cooled refrigerator capable of effectively extending an operation time after a compressor is started.
According to a first aspect of the present invention, there is provided a control method of a mechanical air-cooled refrigerator including a refrigerating compartment and a freezing compartment for storing articles, the control method comprising:
when a compressor and a fan of the mechanical air-cooled refrigerator are in a stop state, acquiring the ambient temperature of an ambient space in which the mechanical air-cooled refrigerator is positioned;
setting a target starting point temperature and a target closing point temperature of the refrigerating chamber according to the environmental temperature; the target starting point temperature and the target closing point temperature are positively correlated with the environment temperature;
and controlling the start and stop of the compressor and the fan according to the environment temperature and the relation between the measured temperature in the refrigerating chamber and the target start point temperature and the target stop point temperature.
Optionally, the step of controlling the start and stop of the compressor and the fan according to the ambient temperature and the relationship between the measured temperature in the refrigerating chamber and the target start point temperature and the target stop point temperature includes:
when the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is greater than or equal to the target starting point temperature, starting the compressor, and starting the fan after delaying for a first preset time period;
and stopping the compressor and the fan when the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is less than or equal to the target shutdown point temperature.
Optionally, when the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is greater than the target shutdown point temperature and less than the target startup point temperature, the control method further includes:
acquiring a first evaporator temperature detected by a defrosting sensor of the mechanical air-cooled refrigerator when the compressor and the fan just stop running and a second evaporator temperature currently detected by the defrosting sensor;
calculating the temperature rise of the evaporator according to the first evaporator temperature and the second evaporator temperature;
the compressor and the blower are selectively activated according to the temperature rise of the evaporator.
Optionally, the step of selectively activating the compressor and the blower according to the temperature rise of the evaporator includes:
when the temperature rise of the evaporator reaches a target temperature rise matched with the ambient temperature, starting the compressor and controlling the compressor to operate at the lowest rotating speed; the target temperature rise is positively correlated with the ambient temperature;
starting the fan after the compressor is started for a second preset time period, and controlling the fan to run at a target duty ratio; the target duty ratio is set such that the amount of cold driven by the blower and flowing into the refrigerating chamber is smaller than the amount of heat input to the refrigerating chamber; and
and stopping the compressor and the fan when the evaporator temperature detected by the defrosting sensor is recovered to the first evaporator temperature.
Optionally, when the ambient temperature is less than or equal to the first preset temperature and greater than a second preset temperature, the target temperature increase matched therewith is a first temperature increase;
when the ambient temperature is less than or equal to the second preset temperature, the target temperature rise matched with the ambient temperature is a second temperature rise; wherein the method comprises the steps of
The first preset temperature is greater than the second preset temperature, and the first temperature rise is greater than the second temperature rise.
Optionally, when the ambient temperature is less than or equal to the first preset temperature and greater than the second preset temperature, the target duty cycle of the fan is a first duty cycle;
when the ambient temperature is less than or equal to the second preset temperature, the target duty ratio of the fan is a second duty ratio; wherein the method comprises the steps of
The first duty cycle is greater than or equal to the second duty cycle.
Optionally, the target duty cycle is 40% or less.
Optionally, the step of setting the target on-point temperature and the target off-point temperature of the refrigerating chamber according to the ambient temperature includes:
when the environmental temperature is greater than a first preset temperature, respectively setting the target starting point temperature and the target closing point temperature to be the preset starting point temperature and the preset closing point temperature of the refrigerating chamber under the current gear;
when the environmental temperature is less than or equal to a second preset temperature, the target starting point temperature and the target closing point temperature are respectively set to be a difference value between the preset starting point temperature and a first temperature value and a difference value between the preset closing point temperature and the first temperature value;
when the environmental temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, the target starting point temperature and the target closing point temperature are respectively set to be a difference value between the preset starting point temperature and a second temperature value and a difference value between the preset closing point temperature and the second temperature value;
wherein the first preset temperature is greater than the second preset temperature, and the first temperature value is greater than the second temperature value.
Optionally, the control method further includes:
starting a defrosting program to defrost an evaporator of the mechanical air-cooled refrigerator when defrosting conditions are met; and
and after defrosting of the evaporator is finished, respectively recovering the target starting point temperature and the target closing point temperature of the refrigerating chamber to the preset starting point temperature and the preset closing point temperature.
According to a second aspect of the present invention, there is also provided a mechanical air-cooled refrigerator including a refrigerating chamber and a freezing chamber for storing articles, further comprising:
the ring temperature detection device is used for detecting the environmental temperature of the environmental space where the mechanical air-cooled refrigerator is located; a refrigeration temperature detection device for detecting the actually measured temperature in the refrigeration chamber; and
the control device comprises a processor and a memory, wherein a machine executable program is stored in the memory, and the machine executable program is used for realizing the control method according to any scheme when being executed by the processor.
According to the mechanical air-cooled refrigerator, when the compressor and the fan are in a stop state, the target starting point temperature and the target closing point temperature of the refrigerating chamber are set according to the environmental temperature of the environmental space where the mechanical air-cooled refrigerator is located, and then the starting and the stopping of the compressor and the fan are controlled according to the environmental temperature and the relation between the measured temperature in the refrigerating chamber and the target starting point temperature and the target closing point temperature. That is, the on-off point temperature of the refrigerating chamber of the mechanical air-cooled refrigerator is not fixed, and the target on-point temperature and the target off-point temperature of the refrigerating chamber are positively correlated with the ambient temperature. In other words, the lower the ambient temperature is, the lower the target start-up point temperature and the target shut-down point temperature of the refrigerating chamber are, which is equivalent to delaying the shutdown time of the compressor, prolonging the operation time of the compressor, ensuring that the freezing chamber has enough cold energy input to keep at a lower temperature, thereby effectively avoiding the problem that the freezing temperature cannot reach the freezing requirement when the ambient temperature is lower and affecting the use of users. In addition, the invention does not need to make any change to the structure of the mechanical air-cooled refrigerator, and does not increase any cost.
Further, the compressor and the fan are typically off when the measured temperature in the fresh food compartment is between the target off-point temperature and the target on-point temperature, and the temperatures in both the fresh food compartment and the freezer compartment rise slowly. However, in the present invention, when the ambient temperature is low (e.g., less than the first preset temperature), the compressor and the blower are selectively started according to the temperature rise of the evaporator since the compressor and the blower stopped, and the evaporator temperature drops to generate cold after the compressor is started; the fan operates to send the cold energy generated by the evaporator to the freezing chamber, so that the temperature rise in the freezing chamber can be effectively restrained, and the freezing chamber still has a good freezing storage effect when the ambient temperature is low.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a schematic flowchart of a control method of a mechanical air-cooled refrigerator according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of controlling the start and stop of a compressor and a fan according to ambient temperature and the relationship between measured temperature within a refrigeration compartment and target start point temperature and target shut down point temperature in accordance with one embodiment of the invention;
FIG. 3 is a schematic flow chart of selectively activating a compressor and a blower according to an amount of temperature rise of an evaporator according to one embodiment of the invention;
fig. 4 is a schematic block diagram of a mechanical air-cooled refrigerator according to an embodiment of the present invention.
Detailed Description
The invention firstly provides a control method of a mechanical air-cooled refrigerator, which comprises a refrigerating chamber and a freezing chamber for storing articles. Fig. 1 is a schematic flowchart of a control method of a mechanical air-cooled refrigerator according to an embodiment of the present invention, referring to fig. 1, the control method of the mechanical air-cooled refrigerator of the present invention includes:
step S10, when a compressor and a fan of the mechanical air-cooled refrigerator are in a stop state, acquiring the environmental temperature of an environmental space in which the mechanical air-cooled refrigerator is positioned;
step S20, setting a target starting point temperature and a target closing point temperature of the refrigerating chamber according to the ambient temperature; wherein, the target start point temperature and the target shut point temperature of the refrigerating chamber are positively correlated with the ambient temperature;
and step S30, controlling the start and stop of the compressor and the fan according to the ambient temperature and the relation between the measured temperature in the refrigerating chamber and the target start point temperature and the target stop point temperature.
Specifically, in step S10, the compressor and the fan may be in a shutdown state based on the measured temperature in the refrigerating chamber reaching the target shutdown point temperature thereof, and at this time, the ambient temperature of the ambient space in which the mechanical air-cooled refrigerator is located may be obtained.
According to the mechanical air-cooled refrigerator, when the compressor and the fan are in a stop state, the target starting point temperature and the target closing point temperature of the refrigerating chamber are set according to the environmental temperature of the environmental space where the mechanical air-cooled refrigerator is located, and then the starting and the stopping of the compressor and the fan are controlled according to the environmental temperature and the relation between the measured temperature in the refrigerating chamber and the target starting point temperature and the target closing point temperature. That is, the temperature of the on-off point of the refrigerating chamber of the mechanical air-cooled refrigerator is not fixed, and the target on-point temperature and the target off-point temperature of the refrigerating chamber are positively correlated with the ambient temperature. In other words, the lower the ambient temperature is, the lower the target start-up point temperature and the target shut-down point temperature of the refrigerating chamber are, which is equivalent to delaying the shutdown time of the compressor, prolonging the operation time of the compressor, ensuring that the freezing chamber has enough cold energy input to keep at a lower temperature, thereby effectively avoiding the problem that the freezing temperature cannot reach the freezing requirement when the ambient temperature is lower and affecting the use of users. In addition, the invention does not need to make any change to the structure of the mechanical air-cooled refrigerator, and does not increase any cost. In addition, the invention replaces the refrigeration compensation heating scheme in the prior art, does not bring extra heat load to the mechanical air-cooled refrigerator and does not increase the energy consumption.
In some embodiments, the step S30 of controlling the start-stop of the compressor and the fan according to the ambient temperature and the relationship between the measured temperature in the refrigerating chamber and the target start-point temperature and the target shutdown point temperature may specifically include:
when the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is greater than or equal to a target starting point temperature, starting the compressor, and starting the fan after delaying for a first preset time;
and stopping the compressor and the fan when the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is less than or equal to a target shutdown point temperature.
That is, when the ambient temperature is low, the compressor is started when the measured temperature in the refrigerating chamber reaches the target starting point temperature, so that the refrigerant circulates in the refrigerating system, after the first preset time, the temperature of the evaporator is low enough, and then the fan is started again, so that the air flows in the refrigerating chamber and the refrigerating chamber are both low-temperature cooling air flows, and the refrigerating efficiency is better. When the ambient temperature is low, the compressor and the fan are directly stopped when the measured temperature in the refrigerating chamber reaches the target shutdown point temperature, so that the temperature in the refrigerating chamber is prevented from being further reduced.
It can be understood that when the ambient temperature is greater than the first preset temperature, it is indicated that the ambient temperature is not very low, and at this time, the influence of the ambient temperature on the temperature control of the freezing chamber is not great, and the mechanical air-cooled refrigerator can control the compressor and the fan according to the conventional control logic, which is not described herein.
In some embodiments, when the ambient temperature is less than or equal to the first preset temperature and the measured temperature in the refrigerating chamber is greater than the target shutdown point temperature and less than the target startup point temperature, the control method of the present invention further comprises:
acquiring a first evaporator temperature detected by a defrosting sensor of the mechanical air-cooled refrigerator when the compressor and the fan just stop running and a second evaporator temperature currently detected by the defrosting sensor;
calculating the temperature rise of the evaporator according to the first evaporator temperature and the second evaporator temperature;
the compressor and the blower are selectively started according to the temperature rise of the evaporator.
When the measured temperature in the refrigerating chamber is between the target shutdown point temperature and the target startup point temperature, that is, the measured temperature in the refrigerating chamber does not reach the target startup point temperature, the compressor and the fan are usually in a shutdown state, and the temperatures in the refrigerating chamber and the freezing chamber are slowly increased. However, in the present invention, when the ambient temperature is low (e.g., less than the first preset temperature), the compressor and the blower are selectively started according to the temperature rise of the evaporator since the compressor and the blower stopped, and the evaporator temperature drops to generate cold after the compressor is started; the fan operates to send the cold energy generated by the evaporator to the freezing chamber, so that the temperature rise in the freezing chamber can be effectively restrained, and the freezing chamber still has a good freezing storage effect when the ambient temperature is low. The defrosting sensor is an existing structure of the mechanical air-cooled refrigerator, the existing structural characteristics of the mechanical air-cooled refrigerator are further utilized, ingenious control logic is designed, the temperature of a freezing chamber at low ambient temperature is further reduced, and the freezing storage effect of the freezing chamber is further ensured.
Specifically, fig. 2 is a schematic flowchart of controlling the start-stop of the compressor and the fan according to the relation between the ambient temperature and the measured temperature in the refrigerating compartment and the target start-point temperature and the target shutdown point temperature, and referring to fig. 2, the step S30 of controlling the start-stop of the compressor and the fan according to the relation between the ambient temperature and the measured temperature in the refrigerating compartment and the target start-point temperature and the target shutdown point temperature may specifically include:
step S31, judging whether the ambient temperature is less than or equal to a first preset temperature; if yes, go to step S32;
step S32, judging whether the measured temperature in the refrigerating chamber is greater than or equal to the target starting point temperature; if yes, go to step S33; if not, go to step S34;
step S33, starting the compressor, and starting the fan after delaying for a first preset time period;
step S34, judging whether the measured temperature in the refrigerating chamber is less than or equal to the target shutdown point temperature; if not, go to step S351; if yes, go to step S36;
step S351, acquiring a first evaporator temperature detected by a defrosting sensor of the mechanical air-cooled refrigerator when the compressor and the fan just stop running and a second evaporator temperature currently detected by the defrosting sensor;
step S352, calculating the temperature rise of the evaporator according to the first evaporator temperature and the second evaporator temperature;
step S353, selectively starting the compressor and the fan according to the temperature rise of the evaporator;
step S36, stopping the compressor and the fan.
Specifically, the temperature of the evaporator slowly increases during the stop of the compressor and the fan, and thus, in step S352, the difference between the second evaporator temperature and the first evaporator temperature is the temperature increase amount of the evaporator.
In some embodiments, the step S353 of selectively activating the compressor and the blower according to the temperature rise amount of the evaporator may specifically include:
when the temperature rise of the evaporator reaches a target temperature rise matched with the ambient temperature, starting the compressor, and controlling the compressor to operate at the lowest rotating speed; the target temperature rise is positively correlated with the ambient temperature;
starting a fan after the compressor is started for a second preset time period, and controlling the fan to run at a target duty ratio; the target duty ratio is set such that the amount of cold driven by the blower and flowing into the refrigerating chamber is smaller than the amount of heat input into the refrigerating chamber; and
when the evaporator temperature detected by the defrosting sensor is restored to the first evaporator temperature, the compressor and the blower fan are stopped.
During the compressor and fan shut down, the evaporator temperature slowly rises. When the temperature rise amount of the evaporator reaches the target temperature rise amount, the compressor is started to operate at the lowest rotation speed, so that the temperature of the evaporator is slowly lowered. When the compressor is started for a second preset period of time, the temperature of the evaporator is reduced to a sufficiently low level, and at the moment, the fan is started, so that cooling air flow with a sufficiently low temperature can be generated. And, the fan is operated at a target duty ratio, the amount of cold flowing into the refrigerating chamber is smaller than the amount of heat input into the refrigerating chamber, and the temperature in the refrigerating chamber is still slowly increased. That is, the target duty cycle of the blower is small enough that a majority of the cooling air flow driven by the blower flows into the freezer compartment closer to the blower and a minority of the cooling air flow does not even flow into the refrigerator compartment farther from the blower. It will be appreciated that the heat input to the refrigeration compartment may originate from the external environment or from the food within the refrigeration compartment. For example, outside air may enter the fresh food compartment through the refrigerator door seal, and the heat carried by the air also enters the fresh food compartment.
However, the fan is closer to the freezer compartment, and even if the fan is operated at a smaller target duty cycle, the cooling air flow is still caused to effectively flow into the freezer compartment, thereby causing the temperature within the freezer compartment to decrease. Therefore, the invention ensures the start-up rate of the compressor and can effectively reduce the temperature in the refrigerating chamber by controlling the duty ratio of the fan, and the design is ingenious.
The evaporator temperature gradually decreases after the compressor is started and the compressor and blower are stopped when the evaporator temperature is restored to the first evaporator temperature (i.e., the evaporator temperature at which the compressor and blower just began to stop). The circulation can ensure that the measured temperature in the refrigerating chamber is between the target shutdown point temperature and the target startup point temperature, so that the normal startup of the compressor is not affected, and the lower temperature in the refrigerating chamber is ensured through intermittent startup of the compressor and the fan.
It will be appreciated that the target duty cycle described above can be achieved through extensive experimental verification, i.e. it can be ensured that the temperature in the refrigerated compartment increases slowly when the fan is operated at the target duty cycle.
FIG. 3 is a schematic flow chart of selectively activating a compressor and a blower according to an amount of temperature rise of an evaporator according to one embodiment of the invention. In some embodiments, referring to fig. 3, the step S353 of selectively activating the compressor and the blower according to the temperature rise amount of the evaporator may specifically include:
step S3531, obtaining a target temperature rise matched with the ambient temperature;
step S3532, judging whether the temperature rise of the evaporator reaches the target temperature rise; if yes, go to step S3533;
step S3533, starting the compressor and controlling the compressor to operate at the lowest rotation speed;
step S3534, starting a fan after the compressor is started for a second preset time period, and controlling the fan to operate at a target duty ratio; and
step S3535, judging whether the evaporator temperature detected by the defrosting sensor is recovered to the first evaporator temperature; if yes, go to step S3536;
step S3536, stopping the compressor and the blower.
In some embodiments, when the ambient temperature is equal to or less than the first preset temperature and greater than the second preset temperature, the target temperature increase matched thereto is the first temperature increase; when the ambient temperature is less than or equal to the second preset temperature, the target temperature rise matched with the ambient temperature is the second temperature rise. Wherein the first preset temperature is greater than the second preset temperature, and the first temperature rise is greater than the second temperature rise.
That is, when the ambient temperature is low, the ambient temperature may be further divided into two levels, one between the first preset temperature and the second preset temperature and the other being less than the second preset temperature, and a target temperature increase amount is set correspondingly, respectively. The lower the ambient temperature, the lower the target temperature rise it matches. I.e. the lower the ambient temperature is, the smaller the temperature rise of the evaporator is, the compressor is started at the lowest rotation speed; that is, the lower the ambient temperature, the less the refrigeration demand of the refrigerator compartment, and the more frequently the compressor is controlled to start at the lowest rotational speed, the more cold energy can be provided for the freezer compartment at the extremely low ambient temperature, and the lower temperature is ensured in the freezer compartment.
Specifically, the first preset temperature may be any temperature value between 12 and 14 ℃. The second preset temperature may be any temperature value between 4 and 6 ℃.
In some embodiments, when the ambient temperature is less than or equal to a first preset temperature and greater than a second preset temperature, the target duty cycle of the blower is the first duty cycle; and when the ambient temperature is less than or equal to a second preset temperature, the target duty ratio of the fan is the second duty ratio. Wherein the first duty cycle is greater than or equal to the second duty cycle.
That is, when the ambient temperature is low, the ambient temperature may be further divided into two levels, one between the first preset temperature and the second preset temperature, and the other is less than the second preset temperature, and the target duty ratios of the one fans are respectively set correspondingly. In a certain range, if the ambient temperature is lower, the thermal load of the freezing chamber is smaller, and at the moment, the target duty ratio of the fan is smaller, namely, the fan drives less cooling air flow to flow into the freezing chamber, so that the temperature in the freezing chamber can be effectively reduced to be within a reasonable range.
Of course, when the ambient temperature is less than or equal to the first preset temperature, the fan may also operate according to the same target duty cycle.
Further, the target duty cycle of the blower may be 40% or less. The inventor finds through many experiments that when the operating duty ratio of the fan is less than or equal to 40%, most of cooling air flow driven by the fan flows into the freezing chamber, and little or no cooling air flow flows into the refrigerating chamber, so that the requirement on the target duty ratio of the fan is just met.
Preferably, in the range of 40% or less, the target duty ratio of the blower may be appropriately adjusted according to the level of the ambient temperature.
In some embodiments, the step S20 of setting the target on-point temperature and the target off-point temperature of the refrigerator compartment according to the ambient temperature may specifically include:
when the ambient temperature is greater than the first preset temperature, respectively setting the target starting point temperature and the target closing point temperature as the preset starting point temperature and the preset closing point temperature of the refrigerating chamber under the current gear;
when the ambient temperature is less than or equal to a second preset temperature, setting the target starting point temperature and the target closing point temperature as a difference value between the preset starting point temperature and the first temperature value and a difference value between the preset closing point temperature and the first temperature value respectively;
when the ambient temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, respectively setting the target starting point temperature and the target closing point temperature as a difference value between the preset starting point temperature and the second temperature value and a difference value between the preset closing point temperature and the second temperature value;
the first preset temperature is greater than the second preset temperature, and the first temperature value is greater than the second temperature value.
Specifically, the refrigerating chamber corresponds to a default preset start point temperature and a default shutdown point temperature of the system under each gear. When the ambient temperature is higher, for example, the ambient temperature is higher than the first preset temperature, the influence of the ambient temperature on the starting rate of the compressor is not great, and at this time, the target starting point temperature and the target shutdown point temperature of the refrigerating chamber are respectively set to be the preset starting point temperature and the preset shutdown point temperature of the refrigerating chamber under the current gear, namely, the refrigerating chamber is controlled according to normal control logic.
When the environmental temperature is extremely low, for example, less than or equal to a second preset temperature, respectively adjusting the target starting point temperature and the target closing point temperature of the refrigerating chamber by a first temperature value on the basis of the preset starting point temperature and the preset closing point temperature; when the ambient temperature is lower, for example, between the second preset temperature and the first preset temperature, the target start point temperature and the target shutdown point temperature of the refrigerating chamber are respectively adjusted by a second temperature value on the basis of the preset start point temperature and the preset shutdown point temperature. The lower the ambient temperature is, the more the target start-up point temperature and the target shut-down point temperature of the refrigerating chamber are adjusted downwards, the longer the delay time of the shutdown of the compressor is, which is equivalent to the longer the operation time of the compressor, and the refrigerating requirement of the refrigerating chamber is more met.
In some embodiments, the control method of the present invention further comprises:
starting a defrosting program to defrost an evaporator of the mechanical air-cooled refrigerator when defrosting conditions are met; and
and after defrosting of the evaporator is finished, respectively recovering the target starting point temperature and the target closing point temperature of the refrigerating chamber to the preset starting point temperature and the preset closing point temperature.
When the evaporator is frosted, the temperature in the whole mechanical air-cooled refrigerator is increased, and the temperature in the refrigerating chamber can necessarily reach the target starting point temperature capable of promoting the starting of the compressor. That is, after defrosting of the evaporator is completed, the compressor must be started, and the freezing chamber must be able to receive cold input. At this time, the target starting point temperature and the target closing point temperature of the refrigerating chamber are respectively restored to the preset starting point temperature and the preset closing point temperature, so that food materials can be prevented from being frozen due to too low temperature in the refrigerating chamber. When the evaporator temperature reaches the preset shutdown point temperature, the compressor and the fan are stopped, and the control program of the step S10 of the invention is entered.
It can be seen that, when the ambient temperature is low, in a complete defrosting cycle, the first start and the first stop of the compressor only after the defrosting of the evaporator is finished are based on the preset start point temperature and the preset stop point temperature of the refrigerating chamber, and the other start and stop are based on the target start point temperature and the target stop point temperature of the refrigerating chamber, and the special start and stop conditions described in the above embodiments of the present invention.
The invention also provides a mechanical air-cooled refrigerator 1, and the mechanical air-cooled refrigerator 1 comprises a refrigerating chamber and a freezing chamber for storing articles. The refrigerating chamber has a refrigerating storage environment, the freezing chamber has a freezing storage environment, and the temperature in the freezing chamber is lower than the temperature in the refrigerating chamber.
In particular, fig. 4 is a schematic block diagram of a mechanical air-cooled refrigerator according to one embodiment of the present invention. Referring to fig. 4, the mechanical air-cooled refrigerator 1 further includes a ring temperature detecting device 10, a refrigerating temperature detecting device 20, and a control device 30 connected to the ring temperature detecting device 10 and the refrigerating temperature detecting device 20. The ring temperature detection device 10 is used for detecting the environmental temperature of the environmental space where the mechanical air-cooled refrigerator 1 is located. The refrigerating temperature detecting device 20 is used for detecting the measured temperature in the refrigerating chamber. The control device 30 includes a processor 31 and a memory 32, the memory 32 stores a machine executable program 33, and the machine executable program 33 is used to implement the control method described in any of the above embodiments when executed by the processor 31.
Specifically, the environment detection device 10 and the refrigeration temperature detection device 20 may each be a device capable of acquiring a temperature value, such as a temperature sensor or a temperature sensing head.
Specifically, the processor 31 may be a central processing unit (central processing unit, simply referred to as CPU), or a digital processing unit, or the like. The processor 31 transmits and receives data through a communication interface. The memory 32 is used to store programs executed by the processor 31. Memory 32 is any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, and may be a combination of memories. The above-described machine-executable program 33 may be downloaded from a computer-readable storage medium to a corresponding computing/processing device or downloaded to a computer or an external memory device via a network (e.g., the internet, a local area network, a wide area network, and/or a wireless network).
It should be understood by those skilled in the art that the above-described embodiments are only a part of embodiments of the present invention, and not all embodiments of the present invention, and the part of embodiments is intended to explain the technical principles of the present invention and not to limit the scope of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the embodiments provided by the present invention, shall still fall within the scope of protection of the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Further, in the description of the present invention, each functional module may be a physical module formed by a plurality of structures, members, or electronic components, or may be a virtual module formed by a plurality of programs; the functional modules may be independent modules or may be functionally divided by a single integral module. It should be understood by those skilled in the art that, on the premise of being able to implement the technical solution described in the present invention, the structural manner, implementation manner and positional relationship of each functional module do not deviate from the technical principle of the present invention anyway, and therefore all functional modules fall within the protection scope of the present invention.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (10)
1. A control method of a mechanical air-cooled refrigerator including a refrigerating compartment and a freezing compartment for storing articles, the control method comprising:
when a compressor and a fan of the mechanical air-cooled refrigerator are in a stop state, acquiring the ambient temperature of an ambient space in which the mechanical air-cooled refrigerator is positioned;
setting a target starting point temperature and a target closing point temperature of the refrigerating chamber according to the environmental temperature; the target starting point temperature and the target closing point temperature are positively correlated with the environment temperature;
and controlling the start and stop of the compressor and the fan according to the environment temperature and the relation between the measured temperature in the refrigerating chamber and the target start point temperature and the target stop point temperature.
2. The control method according to claim 1, wherein
The step of controlling the start and stop of the compressor and the fan according to the ambient temperature and the relation between the measured temperature in the refrigerating chamber and the target start point temperature and the target stop point temperature comprises the following steps:
when the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is greater than or equal to the target starting point temperature, starting the compressor, and starting the fan after delaying for a first preset time period;
and stopping the compressor and the fan when the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is less than or equal to the target shutdown point temperature.
3. The control method according to claim 1, wherein
When the ambient temperature is less than or equal to a first preset temperature and the measured temperature in the refrigerating chamber is greater than the target shutdown point temperature and less than the target startup point temperature, the control method further comprises:
acquiring a first evaporator temperature detected by a defrosting sensor of the mechanical air-cooled refrigerator when the compressor and the fan just stop running and a second evaporator temperature currently detected by the defrosting sensor;
calculating the temperature rise of the evaporator according to the first evaporator temperature and the second evaporator temperature;
the compressor and the blower are selectively activated according to the temperature rise of the evaporator.
4. A control method according to claim 3, wherein
The step of selectively activating the compressor and the blower according to the temperature rise of the evaporator includes:
when the temperature rise of the evaporator reaches a target temperature rise matched with the ambient temperature, starting the compressor and controlling the compressor to operate at the lowest rotating speed; the target temperature rise is positively correlated with the ambient temperature;
starting the fan after the compressor is started for a second preset time period, and controlling the fan to run at a target duty ratio; the target duty ratio is set such that the amount of cold driven by the blower and flowing into the refrigerating chamber is smaller than the amount of heat input to the refrigerating chamber; and
and stopping the compressor and the fan when the evaporator temperature detected by the defrosting sensor is recovered to the first evaporator temperature.
5. The control method according to claim 4, wherein
When the ambient temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, the target temperature rise matched with the ambient temperature is the first temperature rise;
when the ambient temperature is less than or equal to the second preset temperature, the target temperature rise matched with the ambient temperature is a second temperature rise; wherein the method comprises the steps of
The first preset temperature is greater than the second preset temperature, and the first temperature rise is greater than the second temperature rise.
6. The control method according to claim 4, wherein
When the ambient temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, the target duty ratio of the fan is a first duty ratio;
when the ambient temperature is less than or equal to the second preset temperature, the target duty ratio of the fan is a second duty ratio; wherein the method comprises the steps of
The first duty cycle is greater than or equal to the second duty cycle.
7. The control method according to claim 4, wherein
The target duty cycle is 40% or less.
8. The control method according to claim 1, wherein
The step of setting the target start point temperature and the target shut point temperature of the refrigerating chamber according to the environmental temperature comprises the following steps:
when the environmental temperature is greater than a first preset temperature, respectively setting the target starting point temperature and the target closing point temperature to be the preset starting point temperature and the preset closing point temperature of the refrigerating chamber under the current gear;
when the environmental temperature is less than or equal to a second preset temperature, the target starting point temperature and the target closing point temperature are respectively set to be a difference value between the preset starting point temperature and a first temperature value and a difference value between the preset closing point temperature and the first temperature value;
when the environmental temperature is smaller than or equal to the first preset temperature and larger than the second preset temperature, the target starting point temperature and the target closing point temperature are respectively set to be a difference value between the preset starting point temperature and a second temperature value and a difference value between the preset closing point temperature and the second temperature value;
wherein the first preset temperature is greater than the second preset temperature, and the first temperature value is greater than the second temperature value.
9. The control method according to claim 8, further comprising:
starting a defrosting program to defrost an evaporator of the mechanical air-cooled refrigerator when defrosting conditions are met; and
and after defrosting of the evaporator is finished, respectively recovering the target starting point temperature and the target closing point temperature of the refrigerating chamber to the preset starting point temperature and the preset closing point temperature.
10. A mechanical air-cooled refrigerator including a refrigerating compartment and a freezing compartment for storing articles, further comprising:
the ring temperature detection device is used for detecting the environmental temperature of the environmental space where the mechanical air-cooled refrigerator is located;
a refrigeration temperature detection device for detecting the actually measured temperature in the refrigeration chamber; and
control device comprising a processor and a memory, said memory having stored therein a machine executable program, and said machine executable program when executed by said processor being adapted to carry out the control method according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210994458.8A CN117628787A (en) | 2022-08-18 | 2022-08-18 | Mechanical air-cooled refrigerator and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210994458.8A CN117628787A (en) | 2022-08-18 | 2022-08-18 | Mechanical air-cooled refrigerator and control method thereof |
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| CN117628787A true CN117628787A (en) | 2024-03-01 |
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| CN202210994458.8A Pending CN117628787A (en) | 2022-08-18 | 2022-08-18 | Mechanical air-cooled refrigerator and control method thereof |
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| Country | Link |
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| CN (1) | CN117628787A (en) |
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2022
- 2022-08-18 CN CN202210994458.8A patent/CN117628787A/en active Pending
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