WO2022267775A1

WO2022267775A1 - Refrigerating and freezing apparatus control method, and refrigerating and freezing apparatus

Info

Publication number: WO2022267775A1
Application number: PCT/CN2022/093875
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: EP4361535A4; CN115574533A; EP4361535A1

Abstract

Disclosed are a refrigerating and freezing apparatus control method, and a refrigerating and freezing apparatus. The refrigerating and freezing apparatus comprises a cabinet and a refrigeration system. A freezing compartment and at least one non-freezing compartment are defined in the cabinet; the refrigeration system comprises a compressor, a condenser, an electromagnetic valve, a freezing capillary tube and a freezing evaporator that are sequentially connected in series to form a loop; two ends of the freezing capillary tube are connected to at least one non-freezing branch in parallel; and each non-freezing branch comprises a non-freezing capillary tube and a non-freezing evaporator that are connected in series. The control method comprises: when a refrigerating and freezing apparatus is in a refrigeration state of any non-freezing compartment, acquiring an evaporator temperature of a freezing evaporator and a compartment temperature in a freezing compartment; calculating a temperature difference between the evaporator temperature and the compartment temperature; and selectively adjusting an operating frequency of a compressor according to the temperature difference, so as to make the temperature difference between the evaporator temperature and the compartment temperature be within a preset temperature range, wherein the minimum temperature difference endpoint value of the preset temperature range is greater than or equal to zero.

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 temperature in the freezer, which increases the humidity of the freezer to a certain extent. Moisturizing design difficulty.

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 and provide a refrigerating and freezing device capable of avoiding low humidity in the freezing compartment without having a large impact on the compartment temperature in the freezing compartment control method.

Another object of the first aspect of the present invention is to increase the feasibility of practical application of the refrigeration freezer.

The object of the second aspect of the present invention is to provide a refrigerating and freezing device capable of avoiding low humidity in the freezing compartment without greatly affecting the temperature of the compartment in the freezing compartment.

According to the first aspect of the present invention, the present invention provides a method for controlling a refrigerating and freezing device, the refrigerating and freezing device includes a box body and a refrigeration system, the box body defines a freezing compartment and at least one non-refrigerating compartment, so 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, and at least A non-freezing branch circuit, each of the non-freezing branch circuits includes a series non-freezing capillary and a non-freezing evaporator; the control method includes:

When the refrigerating and freezing device is in the cooling state of any non-refrigerating compartment, obtaining the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;

calculating a temperature difference between the evaporator temperature and the compartment temperature; and

Selectively adjust the operating frequency of the compressor according to the temperature difference, so that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range; wherein

The minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero.

Optionally, the step of selectively adjusting the operating frequency of the compressor according to the temperature difference includes:

When the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, increasing the operating frequency of the compressor;

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, reduce the operating frequency of the compressor;

When the temperature difference is within the preset temperature difference range, the operating frequency of the compressor is kept constant.

Optionally, the refrigerating and freezing device further includes a refrigeration fan used to promote the cooling airflow generated by the freezing evaporator to flow to the freezing compartment when the freezing compartment is cooling; the control method further includes:

When the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, control the refrigeration fan to stop;

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the refrigeration fan is controlled to be in the running state.

Optionally, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the rotation speed of the refrigeration fan is less than that of the refrigeration fan during the refrigeration cycle. The set speed when the freezer is in the cooling state of the freezer 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, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor is at the lowest operating frequency of the compressor and the compressor is at the lowest operating frequency of the refrigerating and freezing device Between the set operating frequencies when the freezer is in the cooling state.

Optionally, the preset temperature difference range is any temperature difference value between 1°C and 3°C.

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 in series; 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 solution.

Optionally, the refrigerated freezer also includes:

a refrigeration fan configured to force the cooling airflow generated by the refrigeration evaporator to flow toward the refrigeration compartment when the refrigeration compartment is refrigerated, and configured so that the temperature of the evaporator at the refrigeration evaporator and the temperature of the refrigeration compartment When the temperature difference between the compartment temperatures is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, it is in the stop state; when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is It is in the running state when the temperature difference is within the range.

The refrigerating and freezing device of the present invention is specially provided with a preset temperature difference range, and the minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero. During cooling of non-refrigerated compartments, the operating frequency of the compressor is adjusted according to the temperature difference between the evaporator temperature of the refrigerated evaporator and the compartment temperature in the freezing compartment, so that the temperature difference between the evaporator temperature and compartment temperature is within the above preset within the temperature range. Thus, it is ensured that the temperature of the compartment in the refrigerated compartment is properly higher than the evaporator temperature of the refrigerated evaporator within the preset temperature difference range while satisfying the refrigeration requirement of the non-refrigerated compartment. At this time, the external water vapor entering the freezer through the door seal and the moisture in the freezer (such as the volatilized moisture of the ingredients) will condense in the freezer with a lower temperature instead of condensing at the freezer evaporator. On the one hand, effectively Increase the moisture content in the freezer room, increase the humidity in the freezer room, avoid the low humidity in the freezer room and affect the preservation effect of food materials; on the other hand, the temperature of the refrigerating evaporator will not be too high, avoiding If the temperature of the evaporator is too high, the temperature in the freezer room will rise sharply, which will affect its freezing effect.

Moreover, on the basis of the original structure of the refrigerating and freezing device, the present invention achieves the effect of humidifying and moisturizing the refrigerating compartment without adding any auxiliary components by controlling the operating frequency of the compressor without greatly affecting the temperature of the refrigerating compartment. Therefore, it will not have any impact on the original structure and storage capacity of the refrigerating and freezing device, which improves the feasibility of practical application.

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 flowchart of a control method of a refrigerating and freezing device according to yet another specific embodiment of the present invention;

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

Fig. 7 is a schematic structural block diagram of a refrigeration system according to yet another embodiment of the present invention;

Fig. 8 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 box body 10 and a refrigeration system 20 , and the box body 10 defines a freezer compartment 11 and at least one non-freeze compartment. 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.

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 non-refrigerating branch corresponding to the condenser 22 and 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 realizes that, for the air-cooled refrigerating-freezing device 1, frosting rarely occurs in the storage compartment, and frosting 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.

However, if the temperature of the evaporator at the freezing evaporator 25 is too high, the heat at the freezing evaporator 25 will be transferred to the freezing compartment 11 to increase the temperature in the freezing compartment 11 , thereby affecting the freezing effect of the freezing compartment 11 . More importantly, during the cooling period of the non-freezing compartment, the temperature in the freezing compartment 11 is always changing dynamically. Therefore, if the freezing compartment 11 is to be effectively moisturized or humidified for a long time, it is necessary to ensure that the freezing and evaporation The evaporator temperature of the container 25 is always slightly higher than the compartment temperature of the freezer compartment 11. That is, it is necessary to control the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11 .

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

When the refrigerating-freezing device 1 is in the cooling state of any non-freezing compartment, the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11 are obtained;

Calculate the temperature difference between the evaporator temperature and the compartment temperature; and

Selectively adjust the operating frequency of the compressor 21 according to the temperature difference, so that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range; wherein

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

In order to maintain the humidity in the freezer compartment 11 or increase the humidity in the freezer compartment 11, and avoid the temperature rise in the freezer compartment 11 too much, the refrigerating and freezing device 1 of the present invention is specially provided with a preset temperature range, which is suitable for freezing. The temperature difference between the evaporator temperature of the evaporator 25 and the temperature of the compartment in the freezing compartment 11 is directly monitored, and the minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero. During the refrigeration of the non-refrigerated compartment, the operating frequency of the compressor 21 is adjusted according to the temperature difference between the evaporator temperature of the refrigerated evaporator 25 and the compartment temperature in the refrigerated compartment 11, so that the difference between the evaporator temperature and the compartment temperature The temperature difference is within the above preset temperature difference range. Thus, it is ensured that the temperature of the compartment in the refrigerated compartment 11 is always properly higher than the evaporator temperature of the refrigerated evaporator 25 within the preset temperature difference range while satisfying the refrigeration requirement of the non-refrigerated compartment 11 . 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 freezing evaporator 25, on the one hand, it effectively increases the moisture content in the freezing compartment 11, improves the humidity in the freezing compartment 11, and avoids the low humidity in the freezing compartment 11 from affecting the ingredients. Preservation effect; on the other hand, the temperature of the refrigerating evaporator 25 is not too high, which avoids that the temperature in the refrigerating compartment 11 rises sharply due to the high temperature of the refrigerating evaporator 25 and affects its freezing effect.

Moreover, the present invention achieves the effect of humidifying and moisturizing the freezing compartment 11 without greatly affecting the temperature of 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. Any auxiliary structure needs to be added, therefore, it will not have any impact on the original structure and storage capacity of the refrigerating and freezing device 1, which improves the feasibility of 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 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, obtaining the evaporator temperature of the refrigerated evaporator 25 and the compartment temperature in the refrigerated compartment 11;

Step S40, calculating the temperature difference between the evaporator temperature and the compartment temperature; and

Step S50 , selectively adjusting the operating frequency of the compressor 21 according to the temperature difference, so that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range.

It should be noted that, unless otherwise specified, the temperature difference mentioned in the present invention refers to the temperature difference between the evaporator temperature of the refrigeration evaporator 25 and the temperature of the compartment in the freezer compartment 11 .

In some embodiments, the step of selectively adjusting the operating frequency of the compressor according to the temperature difference may specifically include:

When the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, increase the operating frequency of the compressor 21;

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, reduce the operating frequency of the compressor 21;

When the temperature difference is within the preset temperature difference range, the running frequency of the compressor 21 is kept constant.

Specifically, if the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, it means that the temperature of the evaporator of the freezing evaporator 25 is too high, which may seriously affect the temperature of the compartment in the freezing compartment 11 . Therefore, the present invention properly reduces the temperature of the evaporator of the refrigerated evaporator 25 by increasing the operating frequency of the compressor 21 so that the temperature difference between it and the temperature of the compartment in the refrigerated compartment 11 is within a preset temperature range. At the same time, it can also improve the cooling efficiency of the non-refrigerated compartment.

If the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, it means that the evaporator temperature of the refrigerated evaporator 25 is close to or lower than the temperature of the compartment in the freezer compartment 11, and the outside water vapor entering the freezer compartment 11 through the door seal and The moisture in the freezer compartment 11 will condense at the freezing evaporator 25 at a lower temperature, and the purpose of moisturizing or humidifying the freezer compartment 11 will not be achieved. Therefore, the present invention appropriately increases the evaporator temperature of the refrigerated evaporator 25 by reducing the operating frequency of the compressor 21 so that the temperature difference between it and the temperature of the compartment in the refrigerated compartment 11 is within a preset temperature range.

If the temperature difference is within the preset temperature difference range, it means that the temperature of the evaporator of the refrigeration evaporator 25 is properly higher than the temperature of the compartment in the freezer compartment 11, which will not have a great impact on the temperature in the freezer compartment 11, and It can also ensure that the outside water vapor entering the freezing compartment 11 through the door seal and the moisture in the freezing compartment 11 accumulate in the freezing compartment 11 with a lower temperature, thereby achieving the purpose of moisturizing or humidifying the freezing compartment 11 . At this time, the present invention does not adjust the operating frequency of the compressor 21, so that the non-refrigerated compartment has a relatively high cooling efficiency.

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 S50 may specifically include:

Step S511, judging whether the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range; if yes, go to step S512, if not, go to step S513;

Step S512, increasing the operating frequency of the compressor 21;

Step S513, judging whether the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range; if so, go to step S514, if not, go to step S515;

Step S514, reducing the operating frequency of the compressor 21;

Step S515, keeping the operating frequency of the compressor 21 unchanged.

Certainly, in step S50 of some alternative embodiments, the temperature difference may also be compared with the minimum temperature difference endpoint value of the preset temperature difference range first, and then compared with the maximum temperature difference endpoint value of the preset temperature difference range.

In some embodiments, the refrigerating-freezing device 1 further includes a freezing fan 30 for urging the cooling airflow generated by the freezing evaporator 25 to flow to the freezing compartment 11 when the freezing compartment 11 is cooling. In these embodiments, the control method of the present invention also includes:

When the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, the refrigeration fan 30 is controlled to be in a stopped state;

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the refrigeration fan 30 is controlled to be in the running state.

That is to say, if the temperature of the evaporator of the refrigerated evaporator 25 is too high, the refrigerated fan 30 does not operate, so as to prevent the airflow with a higher temperature at the refrigerated evaporator 25 from flowing to the refrigerated compartment 11 in large quantities and cause the temperature in the refrigerated compartment 11 to rise. high. If the evaporator temperature of the refrigerating evaporator 25 is close to, lower than or properly higher than the compartment temperature in the refrigerating compartment 11, the present invention controls the operation of the refrigerating fan 30. The temperature of the airflow in the chamber 11 is not high, so it will not have a large impact on the temperature of the compartment in the freezing compartment 11. On the other hand, the water vapor formed by the sublimation of the frost on the surface of the freezing evaporator 25 can flow in the freezing fan 30. Under the effect of urging, it enters the freezing compartment 11 at a faster speed, which increases the speed of moisture increase in the freezing compartment 11, thereby increasing the humidification rate of the freezing compartment 11. The present invention abandons the design idea that the refrigeration fan 30 usually stops during the cooling of the non-refrigerated compartment in the prior art, the design idea is very novel, and the humidification effect obtained is very remarkable.

Fig. 5 is a schematic flowchart of a control method for a refrigerating and freezing device according to yet another specific embodiment of the present invention. Referring to Fig. 5, in some other embodiments, the above step S50 may specifically include:

Step S521, judging whether the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range; if so, go to step S522, if not, go to step S523;

Step S522, increasing the operating frequency of the compressor 21, and controlling the refrigeration fan 30 to stop;

Step S523, judging whether the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range; if so, go to step S524, if not, go to step S525;

Step S524, reducing the operating frequency of the compressor 21, and controlling the refrigeration fan 30 to be in an operating state;

Step S525, keeping the operating frequency of the compressor 21 unchanged, and controlling the refrigeration fan 30 to be in an operating state.

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 large.

For this reason, in some embodiments, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the speed of the freezing fan 30 is less than that of the freezing fan 30 when the refrigerating and freezing device 1 is in the freezing compartment. Set speed in cooling state. 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.

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.

For this reason, in some embodiments, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor 21 is at the lowest operating frequency of the compressor 21 and the compressor 21 is in the freezing room of the refrigerating and freezing device 1 between the set running frequencies in the cooling state of the room. 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.

Further, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor 21 is 3-17 Hz lower than the above-mentioned set operating frequency. 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. Moreover, when the compressor 21 operates at an operating frequency within this range, the temperature difference between the evaporator temperature of the refrigerated evaporator 25 and the temperature of the compartment in the refrigerated compartment 11 can be relatively stably kept within the preset temperature difference range.

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

Preferably, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor 21 is 8-12 Hz lower than the above-mentioned set operating frequency of the compressor 21 . Thus, 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.

In some embodiments, the preset temperature difference range may be any temperature difference between 1°C and 3°C. For example, the evaporator temperature of the freezer evaporator 25 may be 1° C., 2° C., or 3° C. higher than the temperature of the compartments in the freezer compartment 11 . The temperature difference within this range can not only ensure that the freezing compartment 11 has a good moisturizing and humidifying effect, but also prevent the temperature of the compartments in the freezing compartment 11 from rising too much and too fast to the greatest extent.

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. 6 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. 7 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. 8 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. 8 , the refrigerating and freezing device 1 of the present invention includes a cabinet 10 , a refrigeration system 20 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.

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

The refrigerating and freezing device 1 of the present invention effectively improves the moisture content in the freezing compartment 11 by directly monitoring the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11, and improves The humidity in the freezing compartment 11 is ensured, and the low humidity in the freezing compartment 11 is prevented from affecting the food preservation effect. Moreover, the temperature of the refrigerating evaporator 25 is not too high, which avoids the temperature in the refrigerated compartment 11 greatly rising due to the high temperature of the refrigerating evaporator 25 and affecting its freezing effect.

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).

In some embodiments, the refrigerating and freezing device 1 further includes a freezing fan 30 . The refrigerating fan 30 is used to impel the cooling airflow generated by the refrigerating evaporator 25 to flow to the refrigerating compartment 11 when the refrigerating compartment 11 is cooling, and is configured so that the evaporator temperature at the refrigerating evaporator 25 and the compartment temperature in the refrigerating compartment 11 It is in the stop state when the temperature difference between them is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, and it is in the running state when the rising temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the rising temperature difference is within the preset temperature difference range. As a result, the moisture at the freezing evaporator 25 can be selectively promoted to enter the freezing compartment 11 faster through the freezing fan 30, thereby improving the humidification efficiency of the freezing compartment 11 and avoiding the high temperature at the freezing evaporator 25. A large amount of air flows to the freezer compartment 11, causing the temperature inside the freezer compartment 11 to rise.

Specifically, the refrigeration blower 30 is electrically connected with the control device 40 to operate under the control of the control device 40 .

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 suitable refrigerating and freezing devices.

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 body and a refrigeration system, the box body is defined with a freezing compartment and at least one non-freezing compartment, and the refrigeration system includes compressors connected in series to form a circuit , a condenser, a solenoid valve, a refrigerated capillary, and a refrigerated evaporator, 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 of the non-refrigerated The freezing branches all include non-refrigerating capillaries and non-refrigerating evaporators connected in series; the control method includes:

When the refrigerating and freezing device is in the cooling state of any non-refrigerating compartment, obtaining the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;

calculating a temperature difference between the evaporator temperature and the compartment temperature; and

Selectively adjust the operating frequency of the compressor according to the temperature difference, so that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range; wherein

The minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero.
The control method according to claim 1, wherein the step of selectively adjusting the operating frequency of the compressor according to the temperature difference comprises:

When the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, increasing the operating frequency of the compressor;

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, reduce the operating frequency of the compressor;

When the temperature difference is within the preset temperature difference range, the operating frequency of the compressor is kept constant.
According to the control method according to claim 2, the refrigerating and freezing device further comprises a refrigerating fan for urging the cooling airflow generated by the refrigerating evaporator to flow to the refrigerating compartment when the refrigerating compartment is refrigerated; Methods also include:

When the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, control the refrigeration fan to stop;

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the refrigeration fan is controlled to be in the running state.
The control method according to claim 3, wherein

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the rotation speed of the refrigeration fan is less than that of the refrigeration fan when the refrigerating and freezing device is freezing. The set speed when the compartment is in cooling state.
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 any one of claims 1-4, wherein

When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor is at the lowest operating frequency of the compressor and the compressor is in the freezing compartment of the refrigerating and freezing device Between the set operating frequencies in cooling state.
The control method according to claim 1, wherein

The preset temperature difference range is any temperature difference value between 1°C and 3°C.
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 in series; and

A control device, comprising 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 realize the control according to any one of claims 1-8 method.
The refrigeration and freezing device according to claim 9, further comprising:

a refrigeration fan configured to force the cooling airflow generated by the refrigeration evaporator to flow toward the refrigeration compartment when the refrigeration compartment is refrigerated, and configured so that the temperature of the evaporator at the refrigeration evaporator and the temperature of the refrigeration compartment When the temperature difference between the compartment temperatures is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, it is in the stop state; when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is It is in the running state when the temperature difference is within the range.