WO2022267773A1

WO2022267773A1 - Control method for refrigerating and freezing apparatus, and refrigerating and freezing apparatus

Info

Publication number: WO2022267773A1
Application number: PCT/CN2022/093872
Authority: WO
Inventors: 崔展鹏; 朱小兵; 陈建全
Original assignee: 青岛海尔电冰箱有限公司; 海尔智家股份有限公司
Priority date: 2021-06-21
Filing date: 2022-05-19
Publication date: 2022-12-29
Also published as: CN115574532A

Abstract

A control method for a refrigerating and freezing apparatus (1), and the refrigerating and freezing apparatus (1). The refrigerating and freezing apparatus (1) comprises a box body (10), a cooling system (20) and a freezing fan (30). A freezing compartment (11) and at least one non-freezing compartment are defined in the box body (10). The cooling system (20) comprises a compressor (21), a condenser (22), a solenoid valve (23), a freezing capillary (24), a freezing evaporator (25), a non-freezing capillary and a non-freezing evaporator which are sequentially connected in series to form a loop. The control method comprises: when the refrigerating and freezing apparatus (1) is in a state of cooling in any non-freezing compartment, reducing the operating frequency of the compressor (21), so that the evaporator temperature of the freezing evaporator (25) is higher than the compartment temperature in the freezing compartment (11); controlling the freezing fan (30) to be in an operating state; obtaining the compartment humidity in the freezing compartment (11); and selectively adjusting the operating frequency of the compressor (21) and the on-off state of the freezing fan (30) according to the compartment humidity, so that the compressor (21) operates at a variable speed and the freezing fan (30) operates intermittently, so as to avoid affecting the cooling efficiency of the non-freezing compartment for a long time.

Description

Control method of refrigerating and freezing device and refrigerating and freezing device

technical field

The invention relates to refrigeration and freezing technology, in particular to a control method of a refrigeration and freezing device and the refrigeration and freezing device.

Background technique

The level of humidity in the refrigerating and freezing device will affect the speed of moisture evaporation of the ingredients, thereby affecting the quality of the ingredients. When the humidity is too low, the water in the ingredients evaporates quickly, which will cause the weight loss of the ingredients, which in turn leads to problems such as poor food storage effect and short food preservation period. Therefore, moisturizing the refrigerated freezer is always a crucial research topic. However, most of the current refrigerating and freezing devices humidify and moisturize the refrigerator compartment, and pay little attention to the problem of humidifying and moisturizing the freezer compartment. In fact, the humidity in the freezer is low, and the moisture loss of meat and other ingredients stored in the freezer for a long time is serious, and the storage effect is poor, which will not only affect the taste of the ingredients, but also cause the loss of nutrition of the ingredients and affect the user experience.

The few schemes about humidifying the freezer in the prior art all add a very complicated humidifying device in the refrigerating and freezing device. However, the temperature of the freezer is low, and the humidifying device itself is prone to frost and be blocked, and the humidifying device will occupy the space of the air duct or the space of the compartment. Therefore, these existing solutions not only increase the cost and assembly difficulty of the refrigerating and freezing device, but are also very difficult to apply in practice, so that the problem of low humidity in the freezing chamber cannot be practically solved.

In the process of studying the technical problem of how to maintain or increase the humidity in the freezer, the applicant realized that humidifying or moisturizing the freezer may affect the cooling of other non-freeze rooms, which increases the freezing temperature to a certain extent. The design difficulty of humidifying and moisturizing the room.

Contents of the invention

An object of the first aspect of the present invention is to overcome at least one defect of the prior art, to provide a refrigerated freezer that can efficiently maintain or increase the humidity of the compartment in the freezer without affecting the cooling efficiency of the non-refrigerated compartment for a long time. The control method of the device.

A further object of the first aspect of the invention is to increase the cooling efficiency of the non-refrigerated compartment.

The object of the second aspect of the present invention is to provide a refrigerating and freezing device that can maintain or increase the humidity of the compartment in the refrigerated compartment without affecting the cooling efficiency of the non-refrigerated compartment for a long time.

According to the first aspect of the present invention, the present invention provides a control method for a refrigerating and freezing device, the refrigerating and freezing device includes a box body, a refrigeration system and a freezing fan, and the box body defines a refrigerated compartment and at least one non-refrigerated compartment The refrigeration system includes a compressor, a condenser, a solenoid valve, a refrigerated capillary and a refrigerated evaporator that are connected in series in sequence. At least one non-refrigerated branch of the amount, each of which includes a non-refrigerated capillary and a non-refrigerated evaporator in series, and the refrigeration fan is used to promote the frozen evaporator when the frozen compartment is refrigerated. The generated cooling air flows to the freezing compartment; wherein the control method includes:

When the refrigerating and freezing device is in the cooling state of any non-refrigerated compartment, reduce the operating frequency of the compressor so that the evaporator temperature of the refrigerated evaporator is higher than the compartment temperature in the refrigerated compartment;

Controlling the refrigerating fan to be in an operating state;

Obtaining the compartment humidity in the freezer compartment; and

Selectively adjust the operating frequency of the compressor and the on/off state of the refrigeration fan according to the humidity of the compartment, so that the compressor operates at variable speeds, and the refrigeration fan operates intermittently, so that the The compartment humidity is dynamically within the preset humidity range.

Optionally, a step of selectively adjusting the operating frequency of the compressor and the start-stop state of the refrigeration fan according to the humidity of the compartment so that the compressor operates at variable speeds and the refrigeration fan operates intermittently include:

When the humidity of the compartment is greater than or equal to the maximum humidity endpoint value of the preset humidity range, stop the refrigeration fan and increase the operating frequency of the compressor;

Obtaining the compartment humidity in the freezing compartment again;

When the reacquired humidity of the compartment is within the preset humidity range, keep the operating frequency of the compressor and the state of the refrigeration fan unchanged; and

When the humidity of the compartment obtained again is less than or equal to the minimum humidity endpoint value of the preset humidity range, the operating frequency of the compressor is reduced again, and the refrigeration fan is started again.

Optionally, when the refrigerating and freezing device is in the cooling state of any non-refrigerating compartment, the reduced operating frequency of the compressor is at the lowest operating frequency of the compressor and the compressor is in the refrigerating between the set operating frequencies when the freezer is in freezer compartment cooling; and/or

When the humidity of the compartment is greater than or equal to the maximum humidity endpoint value of the preset humidity range, the operating frequency of the compressor is increased to the setting of the compressor when the refrigerating and freezing device is in the cooling state of the freezing compartment operating frequency.

Optionally, when the refrigerating-freezing device is in the cooling state of any non-refrigerated compartment, the reduced operating frequency of the compressor is 3-17 Hz lower than the set operating frequency.

Optionally, when the refrigerating and freezing device is in the cooling state of any non-freezing compartment, the rotation speed of the freezing fan is lower than the set rotating speed of the freezing fan when the refrigerating and freezing device is in the cooling state of the freezing compartment .

Optionally, the control method also includes:

When the temperature in the non-refrigerated compartment in the cooling state reaches the set temperature of the non-frozen compartment, if the temperature of the compartment in the refrigerated compartment is higher than the set temperature of the refrigerated compartment, the electromagnetic The valve is switched to the cooling state of the freezing compartment, and the operating frequency of the compressor is restored to a preset operating frequency for cooling the freezing compartment.

Optionally, the maximum humidity endpoint value of the preset humidity range is any relative humidity value between 80% and 100%.

Optionally, the minimum humidity endpoint value of the preset humidity range is any relative humidity value between 45% and 55%.

Optionally, the at least one non-refrigerated compartment comprises a refrigerated compartment, the at least one non-refrigerated branch comprises a refrigerated branch, the non-refrigerated capillary comprises a refrigerated capillary, and the non-refrigerated evaporator comprises a refrigerated evaporator; and/or

The at least one non-refrigerated compartment includes a variable temperature compartment, the at least one non-refrigerated branch includes a variable temperature branch, the non-refrigerated capillary includes a variable temperature capillary, and the non-refrigerated evaporator includes a variable temperature evaporator.

According to a second aspect of the present invention, the present invention also provides a refrigerating and freezing device, comprising:

a cabinet defining a refrigerated compartment and at least one non-refrigerated compartment;

The refrigeration system includes a compressor, a condenser, a solenoid valve, a refrigerated capillary and a refrigerated evaporator connected in series in sequence, and at least a non-refrigerated branch each comprising a non-refrigerated capillary and a non-refrigerated evaporator connected in series;

a refrigeration fan for causing the cooling airflow generated by the refrigeration evaporator to flow to the refrigeration compartment when the refrigeration compartment is refrigerated; and

The control device includes a processor and a memory, where a machine-executable program is stored in the memory, and when the machine-executable program is executed by the processor, it is used to implement the control method described in any of the above schemes.

The refrigerating and freezing device of the present invention increases the temperature of the evaporator of the refrigerating evaporator by reducing the operating frequency of the compressor during the refrigerating period of the non-refrigerating compartment, so that the temperature of the evaporator of the refrigerating evaporator is high while meeting the cooling demand of the non-refrigerating compartment The temperature of the compartment in the freezer compartment, and control the freezer fan to be in the running state. At this time, the external water vapor entering the freezer through the door seal and the moisture in the freezer (such as the moisture volatilized by ingredients) will condense in the freezer with a lower temperature instead of condensing at the freezer evaporator. At the same time, the freezer evaporator The water vapor formed by partial frost sublimation on the surface enters the freezing compartment with lower temperature under the impetus of the freezing fan. Thus, the moisture content in the freezer can be increased simultaneously from multiple aspects, thereby efficiently increasing the humidity in the freezer, and avoiding the low humidity in the freezer from affecting the food preservation effect.

Since the frequency of operation of the compressor is reduced during humidification or humidification of the refrigerated compartment, this will reduce the cooling efficiency of the non-refrigerated compartment to a certain extent. In order to prevent the moisturizing or humidifying operation of the refrigerated compartment from affecting the cooling efficiency of the non-refrigerated compartment for a long time, the present invention sets a preset humidity range, and adjusts the operating frequency and frequency of the compressor according to the humidity of the compartment in the refrigerated compartment. The start-stop state of the refrigeration fan makes the compressor run at variable speed and the refrigeration fan runs intermittently, so that the humidity of the room in the freezer is dynamically within the preset humidity range, which not only maintains or improves the room temperature in the freezer. room humidity without affecting the cooling efficiency of non-refrigerated rooms for a long time.

Further, when the humidity of the compartment in the freezer is greater than or equal to the maximum humidity endpoint value of the preset humidity range, it means that the humidity in the freezer is already high enough, and it is meaningless to continue to increase the humidity in the freezer. At this time, not only the freezing fan is stopped to avoid excessive temperature rise in the freezing room, but also the operating frequency of the compressor is increased to reduce the evaporator temperature of the non-refrigerating evaporator, thereby improving the cooling efficiency of the non-refrigerating room. When the humidity of the compartment in the freezer compartment obtained again after increasing the operating frequency of the compressor and stopping the refrigeration fan is within the preset humidity range, it means that the humidity in the freezer compartment is suitable, and humidification is still not needed. At this time, keeping the operating frequency of the compressor unchanged and keeping the refrigerating fan in a stopped state can prolong the time that the compressor operates at a higher frequency and further improve the refrigerating efficiency of the non-refrigerated compartment.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic structural diagram of a refrigerating and freezing device according to one embodiment of the present invention;

Fig. 2 is a schematic structural block diagram of a refrigeration system of a refrigerator-freezer according to an embodiment of the present invention;

Fig. 3 is a schematic flowchart of a control method of a refrigerating and freezing device according to a specific embodiment of the present invention;

Fig. 4 is a schematic flowchart of a control method of a refrigerating and freezing device according to another specific embodiment of the present invention;

Fig. 5 is a schematic structural block diagram of a refrigeration system according to another embodiment of the present invention;

Fig. 6 is a schematic structural block diagram of a refrigeration system according to yet another embodiment of the present invention;

Fig. 7 is a schematic structural block diagram of a refrigerating and freezing device according to an embodiment of the present invention.

detailed description

The present invention firstly provides a control method for a refrigerating and freezing device, Fig. 1 is a schematic structural diagram of a refrigerating and freezing device according to an embodiment of the present invention, and Fig. 2 is a schematic diagram of a refrigeration system of a refrigerating and freezing device according to an embodiment of the present invention sex structure diagram.

Referring to FIG. 1 and FIG. 2 , the refrigerating and freezing device 1 includes a cabinet 10 , a refrigeration system 20 and a freezing fan 30 . A freezer compartment 11 and at least one non-freeze compartment are defined inside the box body 10 . It can be understood that the freezer compartment 11 is used as a frozen storage compartment, and the non-freezer compartment is used as a non-freezing storage compartment. For example, the non-freezer compartment can be used as a storage room for refrigeration or variable temperature room. Normally, the temperature in the non-refrigerated compartment is higher than the temperature in the refrigerated compartment 11 .

The refrigeration system 20 includes a compressor 21, a condenser 22, a solenoid valve 23, a refrigerated capillary 24, and a refrigerated evaporator 25 that are connected in series in sequence, and two ends of the refrigerated capillary 24 are connected in parallel to provide refrigeration for the above-mentioned at least one non-refrigerated compartment respectively. At least one non-refrigerated branch of the quantity, each non-refrigerated branch includes a non-refrigerated capillary and a non-refrigerated evaporator connected in series. It should be noted that the series connection and parallel connection mentioned in the present invention respectively refer to the physical series connection and parallel connection of the refrigerant flow paths, rather than the series connection and parallel connection of the circuit structure.

The refrigerating fan 30 is used to promote the cooling airflow generated by the refrigerating evaporator 25 to flow to the refrigerating compartment 11 when the refrigerating compartment 11 is cooling. That is to say, the refrigeration blower 30 can force the fluid at the location of the refrigeration evaporator 25 to flow to the refrigeration compartment 11 .

When the refrigerator-freezer 1 is in the cooling state of the non-freezing compartment, the state of the solenoid valve 23 is set to communicate with the condenser 22 and the non-refrigerating branch corresponding to the non-refrigerating compartment. At this time, the refrigerant flowing out from the compressor 21 It passes through the condenser 22, the electromagnetic valve 23, the non-refrigerating evaporator and the non-refrigerating capillary of the non-refrigerating branch, and the freezing evaporator 25 in turn, and finally returns to the compressor 21. When the refrigerating and freezing device 1 is in the state of refrigerating the freezing compartment, the state of the electromagnetic valve 23 is set to communicate with the condenser 22 and the freezing capillary 24. At this time, the refrigerant flowing out from the compressor 21 passes through the condenser 22 and the electromagnetic valve 23 in sequence. , the freezing capillary 24 and the freezing evaporator 25, and finally return to the compressor 21.

The applicant realizes that the freezer compartment 11 is not an absolutely closed compartment. The air carrying moisture from the outside will enter the freezer compartment 11 through the door seal of the freezer compartment 11; the unfrozen ingredients inside the freezer compartment 11 will volatilize a certain amount of moisture; after the ingredients in the freezer compartment 11 are frozen, the ingredients The moisture on the surface has a small amount of sublimation; the frost formed on the surface of the freezing evaporator 25 also has a small amount of sublimation. That is to say, the refrigerating-freezing device 1 originally has a variety of moisture sources that can be used for moisturizing or humidifying the freezing compartment 11 . If these moisture can be effectively used as moisturizing or humidifying the freezing compartment 11, then there is no need to arrange any other humidifying devices.

The applicant further realized that, for the air-cooled refrigerating-freezing device 1 , frost condensation rarely occurs in the storage compartment, and frost condensation basically occurs on the evaporator. This is because the temperature of the evaporator is generally lower than that of the storage compartment. That is to say, water vapor usually gathers and condenses in places with lower temperatures. Then, if the compartment temperature in the freezing compartment 11 is lower than the evaporator temperature at the freezing evaporator 25, water vapor will gather in the freezing compartment 11, which can effectively moisturize the freezing compartment 11 or improve the cooling capacity of the freezing compartment. Indoor humidity.

For this reason, the present invention particularly proposes a kind of control method of refrigeration freezer, and this control method comprises:

When the refrigerator-freezer 1 is in the cooling state of any non-freezing compartment, reduce the operating frequency of the compressor 21, so that the evaporator temperature of the freezing evaporator 25 is higher than the compartment temperature in the freezing compartment 11;

Control the freezing fan 30 to be in the running state;

obtaining the compartment humidity in the freezing compartment 11; and

According to the compartment humidity in the freezing compartment 11, the operating frequency of the compressor 21 and the start-stop state of the freezing fan 30 are selectively adjusted, so that the compressor 21 operates at variable speeds, and the freezing fan 30 runs intermittently, thereby making the freezing compartment The humidity of the compartments in the chamber 11 is dynamically within a preset humidity range.

It should be noted that the variable speed operation of the compressor 21 means that in the non-refrigerated compartment cooling interval, the operating frequency of the compressor may increase, decrease, or remain unchanged in a short period of time; the intermittent operation of the refrigeration fan 30 means Refrigerating fan 30 runs for a period of time, then stops for a period of time and then runs again, and then stops so repeatedly.

The refrigerating and freezing device 1 of the present invention increases the evaporator temperature of the refrigerating evaporator 25 by reducing the operating frequency of the compressor 21 during the cooling period of the non-refrigerating compartment, so that the refrigerating evaporator 25 can The temperature of the evaporator is higher than the temperature of the compartment in the freezing compartment 11, and the control freezing fan is in operation. At this time, the external water vapor entering the freezer compartment 11 through the door seal and the moisture in the freezer compartment 11 (such as the moisture volatilized by the food, the water sublimated on the surface of the frozen food, etc.) will condense in the freezer compartment 11 with a lower temperature. Instead of condensing at the refrigerated evaporator 25. At the same time, the water vapor formed by sublimation of part of the frost on the surface of the refrigerating evaporator 25 enters the refrigerated compartment 11 with a lower temperature under the action of the refrigerating fan 30 . Thus, the moisture content in the freezer compartment 11 can be increased simultaneously from multiple aspects, thereby efficiently increasing the humidity in the freezer compartment 11 , and avoiding the effect of low humidity in the freezer compartment 11 affecting food preservation.

Since the operating frequency of the compressor 21 is reduced during the moisturizing or humidification period of the refrigerated compartment, this will reduce the cooling efficiency of the non-refrigerated compartment to a certain extent. In order to prevent the moisturizing or humidifying operation of the freezing compartment 11 from affecting the cooling efficiency of the non-refrigerating compartment for a long time, the present invention specially sets a preset humidity range, and selectively adjusts it according to the humidity of the compartment in the freezing compartment 11. The operating frequency of the compressor 21 and the start-stop state of the refrigerating fan 30 make the compressor 21 run at variable speeds and the refrigerating fan 30 run intermittently, so that the humidity in the refrigerated compartment 11 is dynamically within the preset humidity range In this way, the humidity in the refrigerated compartment 11 is maintained or increased without affecting the cooling efficiency of the non-refrigerated compartment for a long time.

Moreover, the present invention realizes the effect of humidifying and moisturizing the freezing compartment 11 by controlling the operating frequency of the compressor 21 on the basis of the original structure of the refrigerating and freezing device 1, and does not need to add any auxiliary structure. Therefore, it will not affect the refrigerating and freezing device 1 It will not have any impact on the original structure and storage capacity, which is convenient for practical application. The scheme of the present invention for realizing the humidification and moisturizing of the frozen compartment 11 is completely different from the scheme adopted in the prior art. The design idea is very novel, and the moisturizing and humidification effect is remarkable, and the prospect of practical application is good.

Fig. 3 is a schematic flow chart of a control method of a refrigerating and freezing device according to a specific embodiment of the present invention. Referring to Fig. 3, the control method of the present invention includes:

Step S10, obtaining the current state of the refrigerating and freezing device 1;

Step S20, judging whether the refrigerating-freezing device 1 is in the cooling state of the non-freezing compartment; if so, then go to step S30, if not, then return to step S10; and

Step S30, reducing the operating frequency of the compressor 21, so that the evaporator temperature of the refrigerated evaporator 25 is higher than the compartment temperature in the refrigerated compartment 11;

Step S40, controlling the refrigeration fan 30 to be in the running state;

Step S50, obtaining the compartment humidity in the freezing compartment 11; and

Step S60, selectively adjust the operating frequency of the compressor 21 and the start-stop state of the refrigeration fan 30 according to the humidity of the compartment in the freezing compartment 11, so that the compressor 21 operates at variable speeds, and the refrigeration fan 30 operates intermittently, thereby The humidity of the compartment in the freezer compartment 11 is dynamically within the preset humidity range.

It can be understood that the aforementioned preset humidity range has a maximum humidity endpoint value and a minimum humidity endpoint value, and the maximum humidity endpoint value is greater than the minimum humidity endpoint value.

In some embodiments, according to the compartment humidity in the freezing compartment 11, the operating frequency of the compressor 21 and the start-stop state of the freezing fan 30 are selectively adjusted, so that the compressor 21 operates at variable speeds, and the freezing fan 30 intermittently The specific steps of operation may include:

When the compartment humidity in the freezing compartment 11 is greater than or equal to the maximum humidity endpoint value of the preset humidity range, stop the freezing fan 30 and increase the operating frequency of the compressor 21;

Obtain the compartment humidity in the freezing compartment 11 again;

When the compartment humidity in the refrigerating compartment 11 obtained again is within the preset humidity range, keep the operating frequency of the compressor 21 and the state of the refrigerating fan 30 unchanged; and

When the humidity in the refrigerating compartment 11 obtained again is less than or equal to the minimum humidity endpoint value of the preset humidity range, the operating frequency of the compressor 21 is reduced again, and the refrigerating fan 30 is started again, and so on.

The inventor realized that when the humidity in the freezer compartment 11 is greater than or equal to the maximum humidity endpoint value of the preset humidity range, it means that the humidity in the freezer compartment 11 is already high enough, and then continue to increase the humidity in the freezer compartment 11 has little meaning. At this time, the present invention not only stops the refrigeration blower 30 to prevent the relatively high-temperature airflow at the refrigeration evaporator 25 from flowing too much into the refrigeration compartment 11 to cause an excessive rise in temperature therein, but also increases the operating frequency of the compressor 21 to Reduces the evaporator temperature of the non-refrigerated evaporator, thereby increasing the cooling efficiency of the non-refrigerated compartment. To a certain extent, this weakens or even eliminates the adverse effect on the cooling of the non-refrigerated compartment after the operation frequency of the compressor 21 is reduced because the refrigerated compartment 11 needs to be kept moist or humidified.

When the humidity in the refrigerated compartment 11 obtained again after increasing the operating frequency of the compressor 21 and stopping the refrigerating fan 30 is within the preset humidity range, it means that the humidity in the refrigerated compartment 11 is appropriate, and there is still no need to humidify it . At this time, the present invention still keeps the operating frequency of the compressor 21 unchanged (i.e. runs at the increased operating frequency) and keeps the refrigerating fan 30 in a stopped state, which can prolong the time during which the compressor 21 operates at a higher frequency, and further improves the non-stop operation. Cooling efficiency of the freezer compartment.

When increasing the operating frequency of the compressor 21 and stopping the refrigerating fan 30, the humidity in the refrigerated compartment 11 obtained again is less than or equal to the minimum humidity endpoint value of the preset humidity range, indicating that the humidity in the refrigerated compartment 11 is too low to be Meet the requirements of high-quality preservation of food materials. At this time, the present invention reduces the operating frequency of the compressor 21 again so that the temperature of the evaporator of the refrigerated evaporator 25 is higher than the temperature of the compartment in the refrigerated compartment 11, and starts the refrigerated fan 30 again, so that the refrigerating fan 30 that enters through the door seal can be utilized again. The external water vapor in the freezing compartment 11 , the moisture in the freezing compartment 11 , and the water vapor formed by partial frosting and sublimation on the surface of the freezing evaporator 25 humidify the freezing compartment 11 , and so on.

Fig. 4 is a schematic flowchart of a control method for a refrigerating and freezing device according to another specific embodiment of the present invention. Referring to Fig. 4, the above step S60 may specifically include:

Step S61, judging whether the humidity of the compartment in the freezer compartment 11 is greater than or equal to the maximum humidity endpoint value of the preset humidity range; if yes, go to step S62; if not, return to step S50;

Step S62, stop the refrigeration fan 30, and increase the operating frequency of the compressor 21;

Step S63, acquiring the compartment humidity in the freezing compartment 11 again;

Step S64, judging whether the compartment humidity in the refrigerated compartment 11 acquired again is less than the maximum humidity endpoint value of the preset humidity range; if yes, go to step S65; if not, go to step S62;

Step S65: Determine whether the reacquired compartment humidity in the refrigerated compartment 11 is less than or equal to the minimum humidity endpoint value of the preset humidity range; if yes, go to step S30, if not, go to step S66.

Step S66, keeping the operating frequency of the compressor 21 and the state of the refrigeration fan 30 unchanged.

Of course, in step S60 of some alternative embodiments, it may also be determined in accordance with other appropriate sequences whether the reacquired compartment humidity in the freezing compartment 11 is within a preset humidity range. I won't go into details here.

In some embodiments, the maximum humidity endpoint value of the preset humidity range may be any relative humidity value between 80% and 100%. For example, the maximum humidity endpoint may be 80%, 85%, 90%, 95%, or 100%. Within this range, the humidity in the freezer compartment 11 is not yet saturated, close to saturated or just saturated, the water vapor in the freezer compartment 11 will not or is not easy to condense, and the moisturizing or humidifying effect is better. Therefore, the food preservation effect is better. . At this time, there is no need to continue to humidify the freezer compartment 11 efficiently, so stopping the freezer fan 30 and increasing the operating frequency of the compressor 21 can effectively humidify the freezer compartment 11 without greatly affecting the humidity in the freezer compartment 11. Improve cooling efficiency of unrefrigerated compartments.

If the maximum humidity endpoint value is too large, the refrigeration fan 30 will run continuously, which will not improve the moisturizing effect or humidification effect, but also seriously affect the cooling efficiency of the non-refrigerated compartment. If the maximum humidity endpoint value is too small, the refrigeration fan 30 will be stopped when the humidity in the freezer compartment 11 does not meet the demand, and the operating frequency of the compressor 21 will be increased, resulting in poor humidification effect of the freezer compartment 11, or even Not obvious.

In some embodiments, the minimum humidity endpoint value of the preset humidity range is any relative humidity value between 45% and 55%. For example, the minimum humidity endpoint may be 45%, 47%, 50%, 53%, or 55%. Within this range, the humidity in the freezer compartment 11 is not yet saturated, but it barely affects the quality of the ingredients. If the minimum humidity endpoint value is too large, the compressor 21 will easily reduce the operating frequency again, resulting in the compressor 21 operating at a higher frequency for too short a time and thus unable to effectively improve the cooling efficiency of the non-refrigerated compartment 11 . If the minimum humidity endpoint value is too small, the condition for reducing the operating frequency of the compressor 21 may still not be met after the humidity in the freezing compartment 11 drops excessively, resulting in the inability to carry out substantial and long-term moisturizing of the freezing compartment 11 Humidification operation, the room humidity fluctuation range in the freezer room 11 is relatively large, which is not conducive to the high-quality preservation of food materials.

During the cooling period of the non-freezing compartment, the cooling demand of the non-freezing compartment needs to be met. Therefore, the operating frequency of the compressor 21 cannot be too low.

In some embodiments, when the refrigerating-freezing device 1 is in the cooling state of any non-refrigerated compartment, the reduced operating frequency of the compressor 21 is at the lowest operating frequency of the compressor 21 and the compressor 21 is at the lowest operating frequency of the refrigerating-freezing device 1 Between the set operating frequencies when the freezer compartment is in the cooling state. In this way, the cooling demand of the non-freezing compartment can be met, and the temperature of the evaporator of the freezing evaporator 25 can be appropriately higher than the temperature of the compartment in the freezing compartment 11, so as to realize moisturizing or humidification of the freezing compartment 11 the goal of. Specifically, the reduction range of the operating frequency of the compressor 21 can be the same each time, and can also be adjusted according to the specific humidity in the freezing compartment 11 .

In some embodiments, when the humidity of the compartment in the freezer compartment 11 is greater than or equal to the maximum humidity endpoint value of the preset humidity range, the operating frequency of the compressor 21 can be increased until the compressor 21 is in the freezer compartment when the refrigerating and freezing device 1 is in the freezer compartment. The set operating frequency in the cooling state is to improve the cooling efficiency of the non-refrigerated compartment as much as possible, and weaken the cooling effect of the non-refrigerated compartment after reducing the operating frequency of the compressor 21 due to the need for moisturizing or humidification of the refrigerated compartment 11. adverse effects.

In some embodiments, when the refrigerating-freezing device 1 is in the cooling state of any non-freezing compartment, the reduced operating frequency of the compressor 21 is higher than the setting of the compressor 21 when the refrigerating-freezing device 1 is in the cooling state of the freezing compartment. The fixed operating frequency is 3-17 Hz lower. That is to say, as long as the operating frequency of the compressor 21 is appropriately reduced so that the evaporator temperature of the refrigerated evaporator 25 is slightly higher than the temperature in the refrigerated compartment 11, the refrigerating efficiency and refrigerating efficiency of the non-refrigerated compartment are maximized. Refrigeration effect, and to the greatest possible extent avoid the temperature in the freezing compartment 11 from rising too much.

For example, during non-refrigerated compartment cooling, the reduced operating frequency of compressor 21 may be 3 Hz, 5 Hz, 7 Hz, 9 Hz, 11 Hz, 13 Hz lower than the operating frequency of compressor 21 during refrigerated compartment cooling. , 15 Hz or 17 Hz.

Preferably, when the refrigerating-freezing device 1 is in the cooling state of any non-refrigerated compartment, the reduced operating frequency of the compressor 21 is 8-12 Hz lower than the above-mentioned set operating frequency of the compressor 21 . Therefore, the cooling efficiency and cooling effect of the non-freezing compartment, and the moisturizing and humidifying effect in the freezing compartment 11 are all better.

It can be understood that the aforementioned reduced operating frequency of the compressor 21 includes each reduced operating frequency of the compressor 21 during cooling of the non-refrigerated compartment.

Since the purpose of the refrigeration fan 30 running during the cooling period of the non-freezing compartment is to promote the water vapor formed by the sublimation of part of the condensed frost on the freezing evaporator 25 to enter the freezing compartment 11 rather than delivering airflow to the freezing compartment 11, therefore, The rotational speed of the freezing fan 30 does not need to be relatively high.

For this reason, in some embodiments, when the refrigerating-freezing device 1 is in the cooling state of any non-freezing compartment, the rotating speed of the refrigerating fan 30 is less than the setting of the refrigerating fan 30 when the refrigerating-freezing device 1 is in the refrigerating state of the freezing compartment. Rotating speed. In this way, the water vapor formed by the sublimation of part of the frost on the freezing evaporator 25 can be sent into the freezing compartment 11 quickly, and it can also prevent too much air flow with a relatively high temperature from entering the freezing compartment 11 and causing the freezing in the freezing compartment 11. The temperature rises more and affects the freezing effect of the freezing compartment 11 .

In some embodiments, the control method of the present invention also includes:

When the temperature in the non-freezing compartment in the cooling state reaches the set temperature of the non-refrigerated compartment, if the compartment temperature in the refrigerated compartment 11 is higher than the set temperature of the refrigerated compartment 11, the solenoid valve 23 is controlled to switch. To cool the freezer compartment 11, and restore the operating frequency of the compressor 21 to the preset operating frequency for cooling the freezer compartment 11, so that the freezer compartment 11 reaches the set temperature quickly.

In some embodiments, the at least one non-refrigerated compartment may include a refrigerated compartment 12, the at least one non-refrigerated branch may include a refrigerated branch 201, the non-refrigerated capillary may include a refrigerated capillary 26, and the non-refrigerated evaporator may include A refrigerated evaporator 27 is included. During the cooling period of the refrigerated compartment 12 , the refrigerated compartment 11 is moisturized or humidified by reducing the operating frequency of the compressor 21 .

Fig. 5 is a schematic structural block diagram of a refrigeration system according to another embodiment of the present invention. In other embodiments, the above-mentioned at least one non-refrigerated compartment may include a variable temperature compartment 13, the above-mentioned at least one non-refrigerated branch may include a variable-temperature branch 202, the above-mentioned non-refrigerated capillary may include a variable-temperature capillary 28, and the above-mentioned non-refrigerated evaporator A variable temperature evaporator 29 may be included. During the cooling period of the variable temperature compartment 13 , the freezing compartment 11 is kept moist or humidified by reducing the operating frequency of the compressor 21 .

Fig. 6 is a schematic structural block diagram of a refrigeration system according to yet another embodiment of the present invention. In some other embodiments, the number of non-freezing compartments can be two, which are refrigerated compartments 12 and variable temperature compartments 13 . The number of non-refrigerated branches is two, namely the refrigerated branch 201 and the variable temperature branch 202 . There are two non-refrigerated capillary tubes, which are refrigerated capillary tubes 26 and variable temperature capillary tubes 28 . The number of non-refrigerating evaporators is two, which are refrigerating evaporators 27 and variable temperature evaporators 29 respectively. During cooling of any one of the refrigerated compartment 12 and the variable temperature compartment 13 , the freezing compartment 11 is kept moist or humidified by reducing the operating frequency of the compressor 21 .

The present invention also provides a refrigerating and freezing device, and FIG. 7 is a schematic structural block diagram of the refrigerating and freezing device according to an embodiment of the present invention. Referring to FIG. 1 , FIG. 2 and FIG. 7 , the refrigerating and freezing device 1 of the present invention includes a cabinet 10 , a refrigeration system 20 , a freezing fan 30 and a control device 40 .

A freezer compartment 11 and at least one non-freeze compartment are defined inside the box body 10 .

The refrigeration system 20 includes a compressor 21, a condenser 22, a solenoid valve 23, a refrigerated capillary 24, and a refrigerated evaporator 25 that are connected in series in sequence, and two ends of the refrigerated capillary 24 are connected in parallel to provide refrigeration for the above-mentioned at least one non-refrigerated compartment respectively. At least one non-refrigerated branch of the quantity, each non-refrigerated branch includes a non-refrigerated capillary and a non-refrigerated evaporator connected in series. specifically. The compressor 21 is electrically connected with the control device 40 to operate under the control of the control device 40 .

The refrigerating fan 30 is used to promote the cooling airflow generated by the refrigerating evaporator 25 to flow to the refrigerating compartment 11 when the refrigerating compartment 11 is cooling. Specifically, the refrigeration blower 30 is electrically connected with the control device 40 to operate under the control of the control device 40 .

The control device 40 includes a processor 41 and a memory 42, the memory 42 stores a machine executable program 43, and the machine executable program 43 is used to implement the control method described in any of the above embodiments when executed by the processor 41.

The refrigerating and freezing device 1 of the present invention can quickly and efficiently increase the moisture content in the freezing compartment 11, increase the humidity of the compartment in the freezing compartment 11, and avoid excessive temperature in the freezing compartment 11 caused by the long-time operation of the freezing fan 30. Elevated issues.

Specifically, the processor 41 may be a central processing unit (central processing unit, CPU for short), or a digital processing unit or the like. The processor 41 sends and receives data through the communication interface. The memory 44 is used to store programs executed by the processor 41 . The memory 44 is any medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, and can also be a combination of multiple memories. The above-mentioned machine-executable program 43 can be downloaded from a computer-readable storage medium to a corresponding computing/processing device or downloaded to a computer or an external storage device via a network (such as the Internet, a local area network, a wide area network, and/or a wireless network).

Those skilled in the art should understand that the refrigerating and freezing device 1 of the present invention includes not only a refrigerator, but also a freezer, a freezer or other refrigerating and freezing devices with at least a freezing function.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

A control method for a refrigerating and freezing device, the refrigerating and freezing device includes a box, a refrigeration system and a freezing fan, the box is defined with a freezing compartment and at least one non-refrigerating compartment, and the refrigeration system includes sequentially connected loops A compressor, a condenser, a solenoid valve, a refrigerated capillary, and a refrigerated evaporator, and at least one non-refrigerated branch circuit for providing cooling capacity for the at least one non-refrigerated compartment is connected in parallel at both ends of the refrigerated capillary, each Each of the non-refrigerating branch circuits includes a non-refrigerating capillary tube and a non-refrigerating evaporator connected in series, and the freezing fan is used to promote the cooling airflow generated by the freezing evaporator to flow to the freezing compartment when the freezing compartment is refrigerated; Wherein, the control method includes:

When the refrigerating and freezing device is in the cooling state of any non-refrigerated compartment, reduce the operating frequency of the compressor so that the evaporator temperature of the refrigerated evaporator is higher than the compartment temperature in the refrigerated compartment;

Controlling the refrigerating fan to be in an operating state;

Obtaining the compartment humidity in the freezer compartment; and

Selectively adjust the operating frequency of the compressor and the on/off state of the refrigeration fan according to the humidity of the compartment, so that the compressor operates at variable speeds, and the refrigeration fan operates intermittently, so that the The compartment humidity is dynamically within the preset humidity range.
According to the control method according to claim 1, the operating frequency of the compressor and the on-off state of the refrigeration fan are selectively adjusted according to the humidity of the compartment so that the compressor operates at variable speeds, so that the refrigeration fan Steps to run intermittently include:

When the humidity of the compartment is greater than or equal to the maximum humidity endpoint value of the preset humidity range, stop the refrigeration fan and increase the operating frequency of the compressor;

Obtaining the compartment humidity in the freezing compartment again;

When the reacquired humidity of the compartment is within the preset humidity range, keep the operating frequency of the compressor and the state of the refrigeration fan unchanged; and

When the humidity of the compartment obtained again is less than or equal to the minimum humidity endpoint value of the preset humidity range, the operating frequency of the compressor is reduced again, and the refrigeration fan is started again.
The control method according to claim 2, wherein

When the refrigerating-freezing device is in the cooling state of any non-refrigerating compartment, the reduced operating frequency of the compressor is at the lowest operating frequency of the compressor and the compressor is in the refrigerating state of the refrigerating-freezing device. between the set operating frequencies in the compartment cooling state; and/or

When the humidity of the compartment is greater than or equal to the maximum humidity endpoint value of the preset humidity range, the operating frequency of the compressor is increased to the setting of the compressor when the refrigerating and freezing device is in the cooling state of the freezing compartment operating frequency.
The control method according to claim 3, wherein

When the refrigerating and freezing device is in the cooling state of any non-refrigerated compartment, the reduced operating frequency of the compressor is 3-17 Hz lower than the set operating frequency.
The control method according to any one of claims 1-4, wherein

When the refrigerating-freezing device is in the cooling state of any non-refrigerating compartment, the rotational speed of the refrigerating fan is lower than the set rotating speed of the refrigerating fan when the refrigerating-freezing device is in the cooling state of the freezing compartment.
The control method according to any one of claims 1-4, further comprising:

When the temperature in the non-refrigerated compartment in the cooling state reaches the set temperature of the non-frozen compartment, if the temperature of the compartment in the refrigerated compartment is higher than the set temperature of the refrigerated compartment, the electromagnetic The valve is switched to the cooling state of the freezing compartment, and the operating frequency of the compressor is restored to a preset operating frequency for cooling the freezing compartment.
The control method according to claim 1, wherein

The maximum humidity endpoint value of the preset humidity range is any relative humidity value between 80% and 100%.
The control method according to claim 1, wherein

The minimum humidity endpoint value of the preset humidity range is any relative humidity value between 45% and 55%.
The control method according to claim 1, wherein

The at least one non-refrigerated compartment comprises a refrigerated compartment, the at least one non-refrigerated branch comprises a refrigerated branch, the non-refrigerated capillary comprises a refrigerated capillary, the non-refrigerated evaporator comprises a refrigerated evaporator; and/or

The at least one non-refrigerated compartment includes a variable temperature compartment, the at least one non-refrigerated branch includes a variable temperature branch, the non-refrigerated capillary includes a variable temperature capillary, and the non-refrigerated evaporator includes a variable temperature evaporator.
A refrigerating and freezing device, comprising:

a cabinet defining a refrigerated compartment and at least one non-refrigerated compartment;

The refrigeration system includes a compressor, a condenser, a solenoid valve, a refrigerated capillary and a refrigerated evaporator connected in series in sequence, and at least a non-refrigerated branch each comprising a non-refrigerated capillary and a non-refrigerated evaporator connected in series;

a refrigeration fan for causing the cooling airflow generated by the refrigeration evaporator to flow to the refrigeration compartment when the refrigeration compartment is refrigerated; and

A control device comprising a processor and a memory, wherein a machine-executable program is stored in the memory, and when the machine-executable program is executed by the processor, it is used to realize the control according to any one of claims 1-9 method.