Refrigeration and freezing device and control method thereof

Abstract

The present invention relates to a refrigeration and freezing device and a control method thereof. The refrigeration and freezing device has a storage compartment for storing articles, a thermistor for responding to the temperature inside the storage compartment, and an adjustable resistor for adjusting the set gear of the storage compartment. The thermistor and the adjustable resistor are connected in series. The control method of the present invention includes: obtaining the actual resistance value of the thermistor and the resistance value of the adjustable resistor; taking the sum of the actual resistance value of the thermistor and the resistance value of the adjustable resistor as the virtual resistance value of the thermistor; calculating the virtual temperature of the storage compartment corresponding to the virtual resistance value of the thermistor based on the corresponding relationship between the resistance value of the thermistor and the temperature; and taking the virtual temperature of the storage compartment as the actual measured temperature of the storage compartment obtained to control the refrigeration of the storage compartment. The control method of the present invention uses an adjustable resistor to adjust the gear, does not need to set a display panel, has low cost, and simple control logic.

Description

Technical Field

[0001] The invention relates to refrigeration and freezing technology, and in particular to a refrigeration and freezing device and a control method thereof. Background Art

[0002] With the continuous improvement of living standards, refrigerators have become a must-have household electrical appliance and have entered thousands of households. In addition, the functions of refrigerators are becoming more and more complete. Accurate temperature control and low control cost in the refrigerator storage room have always been the eternal goal pursued by designers. At present, refrigerators are divided into two main categories based on the control method: one is the so-called mechanical refrigerator, which mainly relies on mechanical thermostats to adjust the temperature of the refrigerator; the other is electronic refrigerators or computer refrigerators, which mainly rely on circuit boards or display screens to fully control the work of various components of the refrigerator and adjust the temperature of the refrigerator through touch buttons. The adjustment accuracy of mechanical thermostats is low and the temperature error is large. Electronic refrigerators or computer refrigerators not only have high temperature control accuracy, but also can realize many other practical functions, so they are increasingly favored by users. However, compared with mechanical thermostats, the cost of electronic control boards or display screens is very high. Correspondingly, refrigerators are expensive and do not meet the needs of user groups with lower requirements. Summary of the invention

[0003] An object of the first aspect of the present invention is to overcome at least one drawback of the prior art and to provide a control method for a refrigeration and freezing device that does not require a display panel to adjust the gear position.

[0004] Another object of the first aspect of the present invention is to simplify the control logic of the refrigerator-freezer.

[0005] The second aspect of the present invention aims to provide a refrigeration and freezing device that does not require a display panel to adjust the gear position.

[0006] According to a first aspect of the present invention, the present invention provides a control method for a refrigeration and freezing device, wherein the refrigeration and freezing device has a storage compartment for storing articles, a thermistor for reflecting the temperature inside the storage compartment, and an adjustable resistor for adjusting a setting position of the storage compartment, wherein the thermistor and the adjustable resistor are connected in series, and the control method comprises:

[0007] Obtaining an actual resistance value of the thermistor and a resistance value of the adjustable resistor;

[0008] The sum of the actual resistance value of the thermistor and the resistance value of the adjustable resistor is used as the virtual resistance value of the thermistor;

[0009] Calculating the virtual temperature of the storage compartment corresponding to the virtual resistance value of the thermistor based on the corresponding relationship between the resistance value of the thermistor and the temperature; and

[0010] The virtual temperature of the storage room is used as the actually obtained measured temperature of the storage room to control the refrigeration of the storage room.

[0011] Optionally, the storage compartment has a preset initial setting gear, and the initial setting gear has a start-up point temperature for controlling the storage compartment to start refrigeration and a shut-down point temperature for controlling the storage compartment to stop refrigeration; and

[0012] In the initial setting gear, the resistance of the adjustable resistor is zero.

[0013] Optionally, the step of controlling the refrigeration of the storage room by using the virtual temperature of the storage room as the actually obtained measured temperature of the storage room includes:

[0014] Obtaining a start-up point temperature and a shut-down point temperature corresponding to an initial setting gear position of the storage compartment; and

[0015] The refrigeration of the storage compartment is controlled according to the virtual temperature of the storage compartment and the start-up point temperature and the shut-down point temperature corresponding to the initial setting gear of the storage compartment.

[0016] Optionally, the step of controlling the refrigeration of the storage compartment according to the virtual temperature of the storage compartment and the start-up point temperature and the shut-down point temperature corresponding to the initial setting gear of the storage compartment comprises:

[0017] During the period when the storage room stops cooling, if the virtual temperature of the storage room is higher than or equal to the start-up point temperature corresponding to the initial setting gear of the storage room, the storage room is started to cool; and

[0018] During the cooling process of the storage compartment, if the current virtual temperature of the storage compartment is lower than or equal to the shutdown point temperature corresponding to the initial setting gear of the storage compartment, the cooling of the storage compartment is stopped.

[0019] Optionally, the control method further includes:

[0020] The actual current setting gear position of the storage compartment is determined according to the resistance value of the adjustable resistor.

[0021] Optionally, after determining the actual current setting gear position of the storage compartment according to the resistance value of the adjustable resistor, the control method further includes:

[0022] The operating frequency of the compressor of the refrigeration and freezing device and / or the speed of the air supply fan of the refrigeration and freezing device are adjusted according to the actual current setting gear of the storage compartment.

[0023] Optionally, the storage compartment has a plurality of different actual setting gears, and the greater the resistance value of the adjustable resistor is, the higher the actual setting gear of the storage compartment is.

[0024] Optionally, the thermistor is a negative temperature coefficient thermistor; and

[0025] The higher the temperature inside the storage room, the smaller the actual resistance value of the thermistor; the lower the temperature inside the storage room, the larger the actual resistance value of the thermistor.

[0026] According to another aspect of the present invention, the present invention further provides a refrigeration and freezing device, comprising:

[0027] A box body, which defines a storage compartment for storing items;

[0028] a thermistor, used to respond to the temperature inside the storage room;

[0029] an adjustable resistor connected in series with the thermistor and used to adjust a set gear position in the storage compartment; and

[0030] A control device includes 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 implement the control method described in any of the above embodiments.

[0031] Optionally, the refrigeration and freezing device further comprises:

[0032] The gear adjustment device is mechanically connected to the adjustable resistor and is used to operably adjust the resistance value of the adjustable resistor, thereby adjusting the set gear position of the storage compartment.

[0033] The refrigeration and freezing device of the present invention particularly connects a thermistor and an adjustable resistor in series, and the resistance of the thermistor can change with the temperature in the storage room, so the temperature in the storage room can be reflected by the resistance of the thermistor. The control method of the present invention uses the sum of the actual resistance of the thermistor and the resistance of the adjustable resistor as a virtual resistance, replacing the traditional method of using the actual resistance of the thermistor alone to control whether the storage room is refrigerated or not. When the resistance of the adjustable resistor changes (that is, when the user adjusts the set gear of the storage room), the virtual resistance of the thermistor changes. Based on the corresponding relationship between the resistance of the thermistor and the temperature, the virtual temperature sensed by the thermistor corresponding to the virtual resistance changes. Therefore, controlling the refrigeration of the storage room according to the virtual temperature is equivalent to changing the measured temperature of the storage room, thereby changing the time of starting and stopping the refrigeration of the storage room, and finally realizing the adjustment of the actual set gear of the storage room. It can be seen that the control method of the present invention uses the adjustable resistor to adjust the gear, does not need to set a display panel, and has low cost.

[0034] Furthermore, the present invention can obtain the virtual resistance values ​​of multiple thermistors by adjusting the resistance value of the adjustable resistor, thereby corresponding to multiple different virtual temperatures. The multiple different virtual temperatures can be compared with the power-on point temperature and the power-off point temperature of the same initial setting gear, thereby realizing multiple different actual setting gears in the storage room. In other words, for different actual setting gears, a series of control logics such as obtaining the virtual resistance value, finding the virtual temperature corresponding to the virtual resistance value, and judging the virtual temperature and the power-on and power-off point temperature are the same, that is, only the power-on point temperature and the power-off point temperature of the initial setting gear need to be set, and one control logic needs to be set. There is no need to set multiple groups of power-on and power-off point temperatures as in the prior art, and to perform logical judgments on the gear and temperature respectively, which simplifies the control logic.

[0035] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0037] Figure 1 is a schematic flow chart of a control method for a refrigeration and freezing device according to an embodiment of the present invention;

[0038] Figure 2 is a schematic flow chart of a control method for a refrigeration and freezing device according to another embodiment of the present invention;

[0039] Figure 3 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention;

[0040] Figure 4 The figure is a schematic structural block diagram of a refrigeration and freezing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention first provides a control method for a refrigeration and freezing device, wherein the refrigeration and freezing device has a storage compartment for storing items. The control method for the refrigeration and freezing device of the present invention uses a thermistor and an adjustable resistor to identify an actual setting position adjusted by a user, thereby controlling the temperature in the storage compartment.

[0042] Existing refrigeration and freezing devices also have a solution that uses thermistors and adjustable resistors to jointly achieve temperature control in the storage room. This solution uses an adjustable resistor to set the gear position of the storage room. When the gear position of the storage room is set, the thermistor is used as a temperature sensor to detect the temperature in the storage room. By judging the temperature in the storage room and the start-up point temperature and the shutdown point temperature corresponding to the set gear position, the storage room is controlled to be refrigerated or not. In the existing solution, the gear setting of the adjustable resistor and the temperature detection of the thermistor are two independent processes, and the two are also independent of each other in circuit connection. Therefore, it is necessary to set the corresponding start-up point temperature and shutdown point temperature for each gear position of the storage room. See Table 1 for the start-up and shutdown point temperatures corresponding to different set gear positions. It can be seen that the refrigeration and freezing device needs to store a lot of data, and the control logic is relatively complex.

[0043] Specifically, the setting gear of the storage room can represent the target temperature of the storage room. For example, when the setting gear of the storage room is 1, the target temperature of the storage room is 1°C, that is, the actual temperature in the storage room is maintained at 1°C through refrigeration control.

[0044] Table 1 The temperature of the switch points corresponding to the setting positions of the storage compartments

[0045] Storage compartment settings 1 2 3 4 5 6 7 8 9 Turn on temperature 2℃ 3℃ 4℃ 5℃ 6℃ 7℃ 8℃ 9℃ 10℃ Shutdown point temperature 0℃ 1℃ 2℃ 3℃ 4℃ 5℃ 6℃ 7℃ 8℃

[0046] The refrigeration and freezing device of the present invention further comprises a thermistor for responding to the temperature in the storage compartment and an adjustable resistor for adjusting the setting gear of the storage compartment. In particular, the thermistor and the adjustable resistor are connected in series.

[0047] Figure 1 1 is a schematic flow chart of a control method for a refrigeration and freezing device according to an embodiment of the present invention. The control method of the present invention comprises:

[0048] Step S10, obtaining the actual resistance value of the thermistor and the resistance value of the adjustable resistor;

[0049] Step S20, taking the sum of the actual resistance value of the thermistor and the resistance value of the adjustable resistor as the virtual resistance value of the thermistor;

[0050] Step S30, calculating the virtual temperature of the storage compartment corresponding to the virtual resistance value of the thermistor based on the corresponding relationship between the resistance value of the thermistor and the temperature; and

[0051] Step S40: Using the virtual temperature of the storage room as the actually obtained measured temperature of the storage room to control the refrigeration of the storage room.

[0052] The resistance value of the thermistor can change with the temperature in the storage room. Therefore, the temperature in the storage room can be reflected by the resistance value of the thermistor, that is, the resistance value of the thermistor and the temperature have a certain corresponding relationship.

[0053] Furthermore, the refrigeration and freezing device of the present invention particularly connects the thermistor in series with an adjustable resistor, that is, an adjustable resistor is connected in series in the circuit where the thermistor is located. The control method of the present invention uses the sum of the actual resistance of the thermistor and the resistance of the adjustable resistor as a virtual resistance, replacing the traditional method of using only the actual resistance of the thermistor to control whether the storage compartment is refrigerated. When the resistance of the adjustable resistor changes (that is, when the user adjusts the actual setting gear of the storage compartment), the virtual resistance of the thermistor changes. Based on the corresponding relationship between the resistance of the thermistor and the temperature, the virtual temperature sensed by the thermistor corresponding to the virtual resistance changes. Therefore, controlling the refrigeration of the storage compartment according to the virtual temperature is equivalent to changing the actual measured temperature of the storage compartment, thereby changing the time for the refrigeration of the storage compartment to start and stop, and finally realizing the adjustment of the actual setting gear of the storage compartment. It can be seen that the control method of the present invention uses an adjustable resistor to adjust the gear, does not need to set a display panel, and has a low cost.

[0054] In some embodiments, the storage compartment has a preset initial setting gear, and the initial setting gear has a start-up point temperature for controlling the storage compartment to start cooling and a shut-off point temperature for controlling the storage compartment to stop cooling. Under the initial setting gear, the resistance of the adjustable resistor is zero, that is, the resistance of the adjustable resistor is minimum. At this time, the virtual resistance is the same as the actual resistance of the thermistor, that is, the virtual temperature is the same as the temperature in the storage compartment actually sensed by the thermistor, and the cooling of the storage compartment can be directly controlled according to the temperature in the storage compartment and the start-up point temperature and the shut-off point temperature corresponding to the initial setting gear. Therefore, the actual setting gear in the storage compartment is the initial setting gear.

[0055] When the resistance of the adjustable resistor is greater than zero, the virtual resistance is different from the actual resistance of the thermistor. Based on the corresponding relationship between the resistance and temperature of the thermistor, the virtual temperature corresponding to the virtual resistance is different from the actual measured temperature in the storage room actually sensed by the thermistor. The temperature range in the storage room adjusted according to the virtual temperature is naturally different from the temperature range adjusted according to the actual measured temperature in the storage room, that is, the actual setting gear of the storage room is different from the initial setting gear, which is equivalent to adjusting the actual setting gear of the storage room.

[0056] The present invention can obtain the virtual resistance values ​​of multiple thermistors by adjusting the resistance value of the adjustable resistor, thereby corresponding to multiple different virtual temperatures. The multiple different virtual temperatures can be compared with the power-on point temperature and the power-off point temperature of the same initial setting gear, so as to realize multiple different actual setting gears in the storage room. In other words, for different actual setting gears, a series of control logics such as obtaining the virtual resistance value, finding the virtual temperature corresponding to the virtual resistance value, and judging the virtual temperature and the power-on and power-off point temperature are the same, that is, only the power-on point temperature and the power-off point temperature of the initial setting gear need to be set, and one control logic needs to be set. There is no need to set multiple groups of power-on and power-off point temperatures as in the prior art, and to perform logical judgments on the gear and temperature respectively, which simplifies the control logic.

[0057] Figure 2 is a schematic flow chart of a control method for a refrigeration and freezing device according to another embodiment of the present invention. In other embodiments, the step S40 of controlling the refrigeration of the storage room by using the virtual temperature of the storage room as the actually obtained measured temperature of the storage room may specifically include:

[0058] Step S41, obtaining the on-point temperature and the off-point temperature corresponding to the initial setting gear position of the storage compartment; and

[0059] Step S42, controlling the refrigeration of the storage room according to the virtual temperature of the storage room and the start-up point temperature and the shut-down point temperature corresponding to the initial setting gear of the storage room.

[0060] It should be noted that the initial setting gear of the storage room is pre-set and will never change. That is to say, in the control method of the present invention, what remains unchanged is the start-up point temperature and the shutdown point temperature corresponding to the initial setting gear, that is, the object to be compared remains unchanged, and what changes is the virtual temperature of the storage room.

[0061] Further, the step S42 of controlling the refrigeration of the storage room according to the virtual temperature of the storage room and the start-up point temperature and the shut-down point temperature corresponding to the initial setting gear of the storage room may specifically include:

[0062] During the period when the storage room stops cooling, if the virtual temperature of the storage room is higher than or equal to the start-up point temperature corresponding to the initial setting gear of the storage room, the storage room is started to cool; and

[0063] During the cooling process of the storage room, if the current virtual temperature of the storage room is lower than or equal to the shutdown point temperature corresponding to the initial setting gear of the storage room, the cooling of the storage room is stopped.

[0064] In some embodiments, the thermistor is a negative temperature coefficient thermistor, that is, the resistance of the thermistor decreases as the temperature of the space in which it is located increases, and increases as the temperature of the space in which it is located decreases. Using this principle, the temperature of the storage room can be reflected by the resistance of the thermistor.

[0065] Table 2 Comparison between thermistor resistance and storage room temperature

[0066] Resistance(KΩ) 5.9 5.7 5.5 5.3 5.1 4.9 4.7 4.5 4.3 4.1 temperature 0℃ 1℃ 2℃ 3℃ 4℃ 5℃ 6℃ 7℃ 8℃ 9℃

[0067] Specifically, see Table 2, which is a table showing the corresponding relationship between the resistance of one type of thermistor and the temperature of the storage room. As can be seen from Table 2, the higher the temperature in the storage room, the smaller the actual resistance of the thermistor; the lower the temperature in the storage room, the larger the actual resistance of the thermistor.

[0068] Preferably, the preset initial setting gear of the storage compartment can be gear 1, see Table 1, and its corresponding power-on point temperature and power-off point temperature are 2°C and 0°C respectively. The resistance value of the thermistor corresponding to the power-on point temperature of the initial setting gear is 5.5KΩ, and the resistance value of the thermistor corresponding to the power-off point temperature of the initial setting gear is 5.9KΩ. During the storage room cooling stop period, when the virtual resistance of the thermistor is 5.5KΩ (because the resistance of the adjustable resistor is zero at this time, so the actual resistance of the thermistor is 5.5KΩ), the corresponding virtual temperature of the storage room in Table 2 is 2°C (at this time, the actual temperature of the storage room is also 2°C), reaching the start-up point temperature corresponding to the initial setting gear, and automatically starting the cooling of the storage room; during the storage room cooling process, when the virtual resistance of the thermistor is 5.9KΩ (because the resistance of the adjustable resistor is zero at this time, so the actual resistance of the thermistor is also 5.9KΩ), the corresponding virtual temperature of the storage room in Table 2 is 0°C (at this time, the actual temperature of the storage room is also 0°C), reaching the shutdown point temperature corresponding to the initial setting gear, and automatically stopping the cooling of the storage room.

[0069] When the user adjusts the adjustable resistor to 0.2KΩ, during the storage room stops cooling, when the actual resistance of the thermistor is 5.3KΩ, the virtual resistance can reach 5.5KΩ, corresponding to the virtual temperature of the storage room in Table 2 of 2°C (at this time, the actual temperature of the storage room is 3°C corresponding to the actual resistance of the thermistor 5.3KΩ in Table 2), reaching the start-up point temperature corresponding to the initial setting gear, and automatically starting the cooling of the storage room. However, at this time, the actual temperature of the storage room is 3°C, that is, the cooling is started when the actual temperature of the storage room is 3°C, that is, the actual start-up point temperature of the storage room is 3°C.

[0070] When the user adjusts the resistance of the adjustable resistor to 0.2KΩ, during the cooling process of the storage room, when the actual resistance of the thermistor is 5.7KΩ, the virtual resistance can reach 5.9KΩ, corresponding to the virtual temperature of the storage room in Table 2 of 0℃ (at this time, the actual temperature of the storage room is 1℃ corresponding to the actual resistance of the thermistor 5.7KΩ in Table 2), reaching the shutdown point temperature corresponding to the initial setting gear, and automatically stopping the cooling of the storage room. However, at this time, the actual temperature of the storage room is 1℃, that is, when the actual temperature of the storage room is 1℃, the cooling has stopped, that is, the actual shutdown point temperature of the storage room is 1℃.

[0071] It can be seen that when the user adjusts the resistance of the adjustable resistor to 0.2KΩ, the actual on-point temperature and off-point temperature of the storage room are 3°C and 1°C respectively. The actual setting gear of the storage room in Table 1 is actually gear 2, that is, by adjusting the resistance of the adjustable resistor from zero to 0.2KΩ, the actual setting gear of the storage room can be adjusted from the initial setting gear to gear 2, thus achieving gear adjustment.

[0072] When the user adjusts the resistance of the adjustable resistor to other values, the actual setting gear of the storage compartment can also be determined according to the above method. For example, when the user adjusts the resistance of the adjustable resistor to 0.4KΩ, when the shutdown point temperature corresponding to the initial setting gear is reached, the actual resistance of the thermistor is 5.1KΩ, and the actual shutdown point temperature of the storage compartment is 4°C. When the user adjusts the resistance of the adjustable resistor to 0.4KΩ, when the startup point temperature corresponding to the initial setting gear is reached, the actual resistance of the thermistor is 5.5KΩ, and the actual shutdown point temperature of the storage compartment is 2°C. In the corresponding table 1, the actual setting gear of the storage compartment is gear 3.

[0073] It can be seen that the resistance value of the adjustable resistor is directly related to the actual setting gear of the storage compartment. To this end, in some embodiments, the control method of the present invention further includes:

[0074] The actual setting gear position of the storage compartment is determined according to the resistance value of the adjustable resistor.

[0075] Specifically, see Table 3, which is a comparison table of the resistance value of the adjustable resistor and the actual setting gear position of the storage compartment.

[0076] Table 3 Comparison table of adjustable resistor values ​​and actual setting gears of storage compartments

[0077] Resistance(KΩ) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Actual gear setting 1 2 3 4 5 6 7 8

[0078] It can be seen that even if the present invention only presets one initial setting gear, the storage compartment still has multiple different actual setting gears. The larger the resistance of the adjustable resistor, the higher the actual setting gear of the storage compartment, and the higher the target temperature of the corresponding storage compartment.

[0079] In some embodiments, after the actual setting gear position of the storage compartment is determined, the control method of the present invention further includes:

[0080] The operating frequency of the compressor of the refrigeration and freezing device is adjusted according to the actual setting gear of the storage compartment.

[0081] That is, the actual setting gear of the storage room is different, and the operating frequency of the compressor is also different, so as to more effectively adjust the temperature in the storage room.

[0082] Specifically, the lower the actual setting gear of the storage room is, the lower the target temperature of the storage room is, and the higher the operating frequency of the compressor is, so as to more quickly adjust the temperature in the storage room to the target temperature. Correspondingly, the higher the actual setting gear of the storage room is, the lower the operating frequency of the compressor is, so as to reduce the energy consumption of the compressor as much as possible while meeting the requirements.

[0083] In some embodiments, after the actual setting gear position of the storage compartment is determined, the control method of the present invention further includes:

[0084] The speed of the air supply fan of the refrigeration and freezing device is adjusted according to the current actual setting gear of the storage compartment.

[0085] That is to say, the actual setting gear of the storage room is different, and the speed of the air supply fan is also different, so as to more effectively adjust the amount of cooling air flow sent to the storage room.

[0086] Specifically, the lower the actual setting gear of the storage room is, the lower the target temperature of the storage room is, the greater the speed of the air supply fan is, and the flow rate of the cooling air flow sent to the storage room is increased, so as to adjust the temperature of the storage room as quickly as possible. Correspondingly, the higher the actual setting gear of the storage room is, the lower the speed of the air supply fan is, so as to reduce the energy consumed by the air supply fan as much as possible while meeting the demand of the storage room for cooling air flow.

[0087] The present invention also provides a refrigeration and freezing device. Figure 3 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention, Figure 4 is a schematic structural block diagram of a refrigeration and freezing device according to an embodiment of the present invention. Figure 3 and Figure 4 The refrigerator-freezer 1 of the present invention comprises a box body 10, and a storage compartment 11 for storing articles is defined in the box body 10.

[0088] In particular, the refrigerator-freezer 1 further includes a thermistor 20 for responding to the temperature in the storage compartment 11 , an adjustable resistor 30 connected in series with the thermistor 20 and for adjusting a set gear in the storage compartment 11 , and a control device 40 .

[0089] The control device 40 is connected to the thermistor 20 and the adjustable resistor 30, and includes a processor 41 and a memory 42. The memory 42 stores a machine executable program 43, 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.

[0090] The refrigeration and freezing device 1 of the present invention particularly connects the thermistor 20 and the adjustable resistor 30 in series, that is, an adjustable resistor 30 is connected in series in the circuit where the thermistor 20 is located, and the sum of the actual resistance value of the thermistor and the resistance value of the adjustable resistor is used as a virtual resistance value, replacing the traditional method of using only the actual resistance value of the thermistor to control whether the storage room is refrigerated or not. When the resistance value of the adjustable resistor changes (that is, when the user adjusts the actual setting gear of the storage room), the virtual resistance value of the thermistor changes. Based on the corresponding relationship between the resistance value of the thermistor and the temperature, the virtual temperature sensed by the thermistor corresponding to the virtual resistance value changes. Therefore, controlling the refrigeration of the storage room according to the virtual temperature is equivalent to changing the actual measured temperature of the storage room, thereby changing the time of starting and stopping the refrigeration of the storage room, and finally realizing the adjustment of the actual setting gear of the storage room. It can be seen that the refrigeration and freezing device 1 of the present invention uses an adjustable resistor to adjust the gear, does not need to set a display panel, and has a low cost.

[0091] In a specific embodiment, the storage compartment 11 is preferably a refrigerated compartment with a refrigerated storage environment, that is, the storage temperature in the storage compartment 11 is adjustable in the range of approximately 0 to 10°C.

[0092] In another specific embodiment, the storage compartment 11 is preferably a variable temperature compartment with a variable storage environment, that is, the storage temperature in the storage compartment 11 can be adjusted roughly within the range of -10 to 10°C.

[0093] In some embodiments, the refrigeration and freezing device 1 further includes a gear adjustment device 50 , which is mechanically connected to the adjustable resistor 30 and is used to operably adjust the resistance value of the adjustable resistor 30 , thereby adjusting the set gear position of the storage compartment 11 .

[0094] Specifically, the gear adjustment device 50 may be a gear adjustment paddle, a gear adjustment knob or other suitable structural forms arranged in the storage compartment 11 .

[0095] Those skilled in the art should understand that the refrigeration and freezing device 1 of the present invention may be a single-door refrigerator having only one storage compartment 11 .

[0096] In other embodiments, the refrigeration and freezing device 1 may also be not limited to Figure 3 The refrigerator structure shown may also be a double-door refrigerator having two upper and lower storage compartments, wherein the storage compartment 11 may be the upper storage compartment.

[0097] In other embodiments, the refrigeration and freezing device 1 may also be not limited to Figure 3 The refrigerator structure shown may also be a three-door refrigerator having upper, middle and lower storage compartments, wherein the storage compartment 11 may be a storage compartment located in the upper part or the middle part.

[0098] In other embodiments, the refrigeration and freezing device 1 may also be not limited to Figure 3 The refrigerator structure shown may also be a double-door refrigerator having two storage compartments on the left and right, wherein the storage compartment 11 may be a storage compartment on one side.

[0099] In other embodiments, the refrigeration and freezing device 1 may also be not limited to Figure 3 The refrigerator structure shown can also be a cross-door refrigerator with four storage compartments, namely, upper left, upper right, lower left, and lower right, wherein the storage compartment 11 can be any storage compartment in the upper part.

[0100] In other embodiments, the refrigeration and freezing device 1 may also be not limited to Figure 3 The refrigerator structure shown can also be a freezer, a horizontal freezer or other various special-shaped refrigeration and freezing devices.

[0101] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A control method for a refrigeration and freezing device, the refrigeration and freezing device having a storage compartment for storing articles, a thermistor for reflecting the temperature in the storage compartment, and an adjustable resistor for adjusting a setting position of the storage compartment, the thermistor and the adjustable resistor being connected in series, the control method comprising: Obtaining an actual resistance value of the thermistor and a resistance value of the adjustable resistor; The sum of the actual resistance value of the thermistor and the resistance value of the adjustable resistor is used as the virtual resistance value of the thermistor; Calculating the virtual temperature of the storage compartment corresponding to the virtual resistance value of the thermistor based on the corresponding relationship between the resistance value of the thermistor and the temperature; and Using the virtual temperature of the storage room as the actually obtained measured temperature of the storage room to control the refrigeration of the storage room; The storage compartment has a preset initial setting gear, and the initial setting gear has a start point temperature for controlling the storage compartment to start refrigeration and a shut-off point temperature for controlling the storage compartment to stop refrigeration; and In the initial setting gear, the resistance of the adjustable resistor is zero; The step of controlling the refrigeration of the storage room by using the virtual temperature of the storage room as the actually obtained measured temperature of the storage room comprises: Obtaining a start-up point temperature and a shut-down point temperature corresponding to an initial setting gear position of the storage compartment; as well as Controlling the refrigeration of the storage room according to the virtual temperature of the storage room and the start-up point temperature and the shut-down point temperature corresponding to the initial setting gear of the storage room; The thermistor is a negative temperature coefficient thermistor; and The higher the temperature inside the storage room, the smaller the actual resistance value of the thermistor; the lower the temperature inside the storage room, the larger the actual resistance value of the thermistor.

2. The control method according to claim 1, wherein: The step of controlling the refrigeration of the storage compartment according to the virtual temperature of the storage compartment and the start-up point temperature and the shut-down point temperature corresponding to the initial setting gear of the storage compartment comprises: During the period when the storage room stops cooling, if the virtual temperature of the storage room is higher than or equal to the start-up point temperature corresponding to the initial setting gear of the storage room, the storage room is started to cool; and During the cooling process of the storage compartment, if the current virtual temperature of the storage compartment is lower than or equal to the shutdown point temperature corresponding to the initial setting gear of the storage compartment, the cooling of the storage compartment is stopped.

3. The control method according to claim 1, further comprising: The actual current setting gear position of the storage compartment is determined according to the resistance value of the adjustable resistor.

4. The control method according to claim 3, wherein: After determining the actual current setting gear position of the storage compartment according to the resistance value of the adjustable resistor, the control method further includes: The operating frequency of the compressor of the refrigeration and freezing device and / or the speed of the air supply fan of the refrigeration and freezing device are adjusted according to the actual current setting gear of the storage compartment.

5. The control method according to claim 3, wherein: The storage compartment has a plurality of different actual setting gears, and the greater the resistance value of the adjustable resistor, the higher the actual setting gear of the storage compartment.

6. A refrigeration and freezing device, comprising: A box body, which defines a storage compartment for storing items; a thermistor, used to respond to the temperature inside the storage room; An adjustable resistor, connected in series with the thermistor and used to adjust the set gear position in the storage compartment; as well as A control device comprises 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 implement the control method according to any one of claims 1 to 5.

7. The refrigerator-freezer according to claim 6, further comprising: The gear adjustment device is mechanically connected to the adjustable resistor and is used to operably adjust the resistance value of the adjustable resistor, thereby adjusting the set gear position of the storage compartment.

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