Refrigerator

Abstract

The utility model discloses a refrigerator. The refrigerator comprises an adjustable potentiometer; the voltage division circuit comprises a first voltage division resistor and a second voltage division resistor with different resistance values; one end of the first divider resistor is connected with a direct-current power supply, the other end of the first divider resistor is connected with one end of the second divider resistor, the other end of the second divider resistor is connected with one end of the adjustable potentiometer, and the other end of the adjustable potentiometer is grounded; the toggle switch comprises a first static contact, a movable contact and a second static contact; the first static contact is connected with one end of the first divider resistor, one end of the movable contact is connected with the other end of the first divider resistor, and the second static contact is connected with the other end of the second divider resistor; and a sampling port of the control unit is connected with a connection node of the second divider resistor and the adjustable potentiometer. According to the refrigerator, by designing the adjustable potentiometer, the voltage division circuit and the toggle switch, the number of selectable gears is greatly increased, and the technical problem that in the prior art, the number of gears is small is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliances, in particular to a refrigerator. Background Art

[0002] At present, the use of refrigerators is very popular and has become a very important household appliance.

[0003] As people's living standards continue to improve, the requirements for refrigerators are getting higher and higher, and the programs performed by refrigerators are also increasing.

[0004] At present, in the industry, different functions of refrigerators correspond to different programs. Most of the selection of different programs is through DIP switches or jumpers. By detecting high and low level signals, different gears are detected to execute different programs.

[0005] However, the DIP switch is large in size, occupies a large space, and has a limited number of selectable positions.

[0006] The jumper method is not convenient for users to operate, and the number of gears is relatively small. Summary of the invention

[0007] The utility model provides a refrigerator, which solves the technical problem of the small number of gear positions in the prior art.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] The utility model provides a refrigerator, comprising:

[0010] Adjustable potentiometer;

[0011] The voltage-dividing circuit comprises a first voltage-dividing resistor and a second voltage-dividing resistor having different resistance values; one end of the first voltage-dividing resistor is connected to a DC power supply, the other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, the other end of the second voltage-dividing resistor is connected to one end of the adjustable potentiometer, and the other end of the adjustable potentiometer is grounded;

[0012] A toggle switch, comprising a first static contact, a moving contact, and a second static contact; the first static contact is connected to one end of the first voltage-dividing resistor, one end of the moving contact is connected to the other end of the first voltage-dividing resistor, and the second static contact is connected to the other end of the second voltage-dividing resistor;

[0013] A control unit, wherein a sampling port thereof is connected to a connection node between the second voltage-dividing resistor and the adjustable potentiometer.

[0014] In some embodiments of the present application, the sampling port of the control unit is connected to the connection node between the second voltage-dividing resistor and the adjustable potentiometer through a filter resistor;

[0015] The sampling port of the control unit is grounded via a filter capacitor.

[0016] In some embodiments of the present application, a plurality of gear position markings are silk-screened on the PCB printed board on which the adjustable potentiometer is mounted.

[0017] In some embodiments of the present application, the top of the adjustable potentiometer has an indicating groove, and one end of the indicating groove is arrow-shaped.

[0018] In some embodiments of the present application, the refrigerator further includes:

[0019] A storage unit, which is used to store voltage values ​​and corresponding gear information;

[0020] The control unit is connected to the storage unit, and the control unit queries the corresponding gear position from the storage unit according to the collected voltage value.

[0021] The utility model provides a refrigerator, comprising:

[0022] Adjustable potentiometer;

[0023] A voltage divider circuit comprises a plurality of voltage divider resistors connected in series; the resistance values ​​of the plurality of voltage divider resistors are different, one end of the voltage divider circuit is connected to a DC power supply, the other end of the voltage divider circuit is connected to one end of the adjustable potentiometer, and the other end of the adjustable potentiometer is grounded;

[0024] A switch assembly, comprising a plurality of switches, the plurality of switches corresponding to the plurality of voltage-dividing resistors one by one, the switches being connected in parallel at both ends of the corresponding voltage-dividing resistors;

[0025] A control unit, wherein a sampling port of the control unit is connected to a connection node between the voltage divider circuit and the adjustable potentiometer.

[0026] In some embodiments of the present application, the sampling port of the control unit is connected to the connection node between the voltage divider circuit and the adjustable potentiometer through a filter resistor;

[0027] The sampling port of the control unit is grounded through a filter capacitor.

[0028] In some embodiments of the present application, a plurality of gear position markings are silk-screened on the PCB printed board on which the adjustable potentiometer is mounted.

[0029] In some embodiments of the present application, the top of the adjustable potentiometer has an indicating groove, and one end of the indicating groove is arrow-shaped.

[0030] In some embodiments of the present application, the refrigerator further includes:

[0031] A storage unit, which is used to store voltage values ​​and corresponding gear information;

[0032] The control unit is connected to the storage unit, and the control unit queries the corresponding gear position from the storage unit according to the collected voltage value.

[0033] The technical solution of the utility model has the following technical effects relative to the prior art: the refrigerator of the utility model includes a first voltage-dividing resistor and a second voltage-dividing resistor by designing a voltage-dividing circuit; one end of the first voltage-dividing resistor is connected to a DC power supply, the other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, the other end of the second voltage-dividing resistor is connected to one end of an adjustable potentiometer, and the other end of the adjustable potentiometer is grounded; the toggle switch includes a first static contact, a moving contact, and a second static contact; the first static contact is connected to one end of the first voltage-dividing resistor, one end of the moving contact is connected to the other end of the first voltage-dividing resistor, and the second static contact is connected to the other end of the second voltage-dividing resistor; the sampling port of the control unit is connected to the connection node of the second voltage-dividing resistor and the adjustable potentiometer. Therefore, the refrigerator of the utility model greatly increases the number of selectable gears by designing an adjustable potentiometer, a voltage-dividing circuit, and a toggle switch, and the toggle switch is small in size, occupies little space, and is easy to operate, which solves the technical problem of the small number of gears in the prior art.

[0034] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 This is a circuit diagram of an embodiment of the refrigerator of the utility model;

[0037] Figure 2 This is a circuit diagram of another embodiment of the refrigerator of the utility model;

[0038] Figure 3 This is a circuit diagram of another embodiment of the refrigerator of the utility model;

[0039] Figure 4 It is the position diagram and circuit diagram of the toggle lever when the toggle switch is in the off state;

[0040] Figure 5 It is a lever position diagram and circuit diagram when the toggle switch is in the on state;

[0041] Figure 6 It is the position diagram and circuit diagram of the toggle switch when the toggle switch is in the on state 2;

[0042] Figure 7 This is a schematic diagram of the gear position markings printed on the PCB;

[0043] Figure 8 A schematic diagram of an indicating groove of an adjustable potentiometer;

[0044] Fig. 9 A flowchart of an embodiment of the steps performed for powering on a refrigerator;

[0045] Fig.10 This is a circuit diagram of another embodiment of the refrigerator of the utility model;

[0046] Fig.11 This is a circuit diagram of another embodiment of the refrigerator of the utility model;

[0047] Fig.12 This is a circuit diagram of another embodiment of the refrigerator of the utility model;

[0048] Fig.13 The lever position diagram and circuit diagram when the switch is in the off state;

[0049] Fig.14 This is the lever position diagram and circuit diagram when the switch is in the on state.

[0050] Reference numerals:

[0051] 1-1, connecting seat; 1-2, lever;

[0052] 2-1. Connecting seat; 2-2. Lever. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0056] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0059] Embodiment 1

[0060] The refrigerator of this embodiment includes an adjustable potentiometer RT, a voltage dividing circuit, a toggle switch S1, a control unit, etc. Figure 1 shown.

[0061] The adjustable potentiometer RT has an adjustable resistance. The adjustable potentiometer RT is a high-precision potentiometer with a maximum resistance of Rk. The resistance of the adjustable potentiometer RT varies with the rotation angle. When the adjustable potentiometer RT rotates one circle, its resistance changes between 0 and Rk.

[0062] The voltage divider circuit includes a first voltage divider resistor R1 and a second voltage divider resistor R2 with different resistance values. One end of the first voltage divider resistor R1 is connected to a DC power supply VCC (such as a voltage of 5V), the other end of the first voltage divider resistor R1 is connected to one end of the second voltage divider resistor R2, the other end of the second voltage divider resistor R2 is connected to one end of an adjustable potentiometer RT, and the other end of the adjustable potentiometer RT is grounded.

[0063] The toggle switch S1 includes a first static contact C, a moving contact A, and a second static contact B; the first static contact C is connected to one end of the first voltage-dividing resistor R1, one end of the moving contact A is connected to the other end of the first voltage-dividing resistor R1, and the second static contact B is connected to the other end of the second voltage-dividing resistor R2.

[0064] The sampling port of the control unit (MCU) is connected to the connection node between the second voltage-dividing resistor R2 and the adjustable potentiometer RT. That is, the sampling port of the control unit collects the divided voltage on the adjustable potentiometer RT.

[0065] The toggle switch S1 is a three-position toggle switch, that is, the toggle switch S1 has three states: disconnected state, conductive state 1, and conductive state 2. When the lever 1-2 of the toggle switch S1 is at different positions of the connecting base 1-1, the toggle switch S1 is in different states. Figures 4 to 6 shown.

[0066] (1) Disconnected state: see Figure 4As shown, when the lever 1-2 of the toggle switch ( Figure 4 When the moving contact A is in the middle position of the connecting base 1-1 of the toggle switch, the other end of the moving contact A is neither connected to the first static contact C nor to the second static contact B. At this time, the toggle switch S1 is in the disconnected state.

[0067] At this time, the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 both play a voltage-dividing role. The first voltage-dividing resistor R1, the second voltage-dividing resistor R2, and the adjustable potentiometer RT are connected in series. The voltage value Vad collected by the AD sampling port of the control unit is VCC*RT / (R1+R2+RT). Figure 1 shown.

[0068] (2) On state 1: See Figure 5 As shown, when the toggle switch lever 1-2 is moved to the lower end position of the connecting base 1-1 of the toggle switch, the other end of the moving contact A is connected to the first static contact C, and the toggle switch S1 is in the on state one.

[0069] At this time, the first voltage-dividing resistor R1 is short-circuited, the second voltage-dividing resistor R2 and the adjustable potentiometer RT are connected in series, and the voltage value Vad collected by the AD sampling port of the control unit is VCC*RT / (R2+RT). Figure 2 shown.

[0070] (3)Conduction state 2: See Figure 6 As shown, when the toggle switch lever 1-2 is moved to the upper end position of the connecting base 1-1 of the toggle switch, the other end of the moving contact A is connected to the second static contact B, and the toggle switch S1 is in the on state two.

[0071] At this time, the second voltage-dividing resistor R2 is short-circuited, the first voltage-dividing resistor R1 and the adjustable potentiometer RT are connected in series, and the voltage value Vad collected by the AD sampling port of the control unit is VCC*RT / (R1+RT). Figure 3 shown.

[0072] By designing three states of the toggle switch S1, the first voltage-dividing resistor R1 is short-circuited, the second voltage-dividing resistor R2 is short-circuited, or both voltage-dividing resistors are not short-circuited.

[0073] The resistance value of the adjustable potentiometer RT is adjustable. By changing the resistance value of the adjustable potentiometer RT, the sampling port of the control unit can collect different voltage values.

[0074] During the process of the adjustable resistor RT rotating one circle, its resistance value changes. The adjustable resistor RT rotates at different angles, and its resistance value is different, and the voltage value collected by the sampling port of the control unit is different. The control unit can obtain the resistance value of the adjustable resistor based on the collected voltage value. Each voltage value corresponds to a resistance value of the adjustable resistor.

[0075] Assume that each time the adjustable resistor RT rotates a set angle, it is set to a gear, and a total of N gears are set for one rotation. The adjustable potentiometer RT has different rotation angles, and its resistance value is different, and the voltage value collected by the control unit is different. Therefore, the control unit can know the current gear according to the collected voltage value.

[0076] Therefore, the control unit can determine N different gear positions according to the N different voltage values ​​collected.

[0077] In each state of the toggle switch, the control unit can determine N gears according to the N different voltage values ​​collected. Therefore, in the three states of the toggle switch, the control unit can determine the corresponding 3N different gears according to the 3N different voltage values ​​collected, which greatly increases the number of selectable gears.

[0078] Therefore, by turning the adjustable resistor and changing the state of the toggle switch, the refrigerator can recognize 3N different gears.

[0079] The toggle switch is easy to operate, and the user can change the state by toggling the lever. In addition, the size of the toggle switch is much smaller than that of the dip switch, so it takes up less space.

[0080] The refrigerator of this embodiment includes a first voltage-dividing resistor and a second voltage-dividing resistor by designing a voltage-dividing circuit; one end of the first voltage-dividing resistor is connected to a DC power supply, the other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, the other end of the second voltage-dividing resistor is connected to one end of an adjustable potentiometer, and the other end of the adjustable potentiometer is grounded; the toggle switch includes a first static contact, a moving contact, and a second static contact; the first static contact is connected to one end of the first voltage-dividing resistor, one end of the moving contact is connected to the other end of the first voltage-dividing resistor, and the second static contact is connected to the other end of the second voltage-dividing resistor; the sampling port of the control unit is connected to the connection node of the second voltage-dividing resistor and the adjustable potentiometer. Therefore, the refrigerator of this embodiment greatly increases the number of selectable gears by designing an adjustable potentiometer, a voltage-dividing circuit, and a toggle switch. Moreover, the toggle switch is small in size, occupies little space, and is easy to operate, which solves the technical problem of the small number of gears in the prior art.

[0081] In some embodiments of the present application, in order to facilitate the user to identify the gear position, a plurality of gear position marks are silk-screened on the PCB printed board on which the adjustable potentiometer is installed. The plurality of gear position marks on the PCB printed board are arranged around the adjustable potentiometer. The plurality of gear position marks are on the same circumference. The gear position mark can be a name, a number, a pattern, etc.

[0082] Different gear position marks correspond to different gear positions, correspond to different rotation angles of the adjustable potentiometer, correspond to different resistance values ​​of the adjustable potentiometer, and correspond to different voltage values ​​collected by the control unit.

[0083] The silk-screen position (gear position mark) on the PCB must be clearly visible without being blocked by other devices, and the adjustable potentiometer can be rotated normally to select the corresponding silk-screen position.

[0084] There are N gear position marks printed on the PCB around the adjustable potentiometer. When the adjustable potentiometer is turned to a certain gear, the control unit can know the current gear position based on the collected voltage value.

[0085] For example, see Figure 7 As shown, the gear position marks printed on the PCB printed board are numbers 1 to 7, indicating gear positions 1 to 7. The 7 gear position marks are arranged around the adjustable potentiometer.

[0086] The rotation angle of the adjustable potentiometer corresponds to the gear mark one by one. For example, the rotation angle of the adjustable potentiometer is 0~270°, and its resistance value range is 0~Rk. Every 45° rotation of the adjustable potentiometer is set as a gear, and a total of 7 gears are set. The starting angle of the potentiometer is 270°, which is divided into 7 gears at 45° angle intervals.

[0087] Of course, it is not limited to being divided into 7 positions at an angle interval of 45 degrees, and it can also be divided into N positions at a certain angle interval according to the actual number of gears N required. The larger the angle interval, the greater the recognition and the smaller the error.

[0088] In some embodiments of the present application, the top of the adjustable potentiometer has an indicating groove, and one end of the indicating groove is in the shape of an arrow, which is used to point to the gear mark, so that the user can easily know the gear position pointed to by the adjustable potentiometer, see Figure 8 shown. Figure 8 The circular area in the figure is the adjustable potentiometer, and the black area is the indicator groove.

[0089] When the adjustable potentiometer rotates, its indicating groove points to the N silk-screen marks on the PCB printed board in turn, and the adjustable potentiometer has corresponding N different resistance values, and the control unit can collect N different voltage values. The control unit determines the corresponding gear according to the collected voltage value, that is, determines the corresponding program to be executed.

[0090] The adjustable resistor is divided into N gears. The value of N should not be too large. The AD sampling value area should be as large as possible to avoid errors affecting the operation of the wrong program. When selecting, the arrow of the adjustable potentiometer should be aligned with the silk screen on the PCB printed board.

[0091] When the adjustable potentiometer is rotated, the arrow on the indicating groove points to the gear mark at different positions to display the gear size.

[0092] In some embodiments of the present application, the sampling port of the control unit is connected to the connection node of the second voltage-dividing resistor R2 and the adjustable potentiometer RT through the filter resistor R0 to eliminate noise and ensure that the control unit collects a relatively accurate voltage value.

[0093] In some embodiments of the present application, the sampling port of the control unit is grounded through a filter capacitor C1 to eliminate high-frequency noise and prevent the high-frequency noise from affecting the voltage value collected by the control unit.

[0094] In some embodiments of the present application, in order to facilitate the storage of gear information, the refrigerator also includes a storage unit.

[0095] The storage unit is used to store the voltage value and the corresponding gear information.

[0096] The control unit is connected to the storage unit, and the control unit queries the corresponding gear position from the storage unit according to the collected voltage value.

[0097] The control unit queries the storage unit according to the collected voltage value to obtain the corresponding gear position.

[0098] Specifically, the storage unit stores the AD value corresponding to the voltage value and the corresponding gear information. That is, the storage unit stores the AD value and the corresponding gear information. The control unit queries the storage unit according to the AD value corresponding to the collected voltage value to obtain the corresponding gear.

[0099] Each gear corresponds to a running program.

[0100] In some other embodiments of the present application, the storage unit is also used to store voltage values ​​and corresponding operating programs.

[0101] The control unit queries the storage unit according to the collected voltage value to obtain the corresponding gear position and the corresponding operating program.

[0102] Specifically, the storage unit stores the AD value corresponding to the voltage value and the corresponding operating program. That is, the storage unit stores the AD value and the corresponding operating program. The control unit queries the storage unit according to the AD value corresponding to the collected voltage value to obtain the corresponding gear position and the corresponding operating program.

[0103] Turn the adjustable potentiometer to adjust to the corresponding gear. After each power failure, when the power is turned on again, the AD sampling port of the control unit will collect the voltage value Vad. The control unit will know the corresponding gear according to the AD value corresponding to the collected voltage value. Each gear corresponds to an operating program, and the signal is displayed through the display panel or other means, so that the user can know the program currently selected by the refrigerator. See Fig. 9 shown.

[0104] The refrigerator of this embodiment is a refrigerator that can select a program to run. By changing the state of the toggle switch and rotating the adjustable potentiometer, the control unit determines the corresponding gear according to the detected voltage value, each gear corresponds to a program, and then executes the corresponding program. Through the three states of the toggle switch and the N gears of the adjustable potentiometer in each state, the number of selectable gears is 3N, that is, the number of selectable programs is 3N.

[0105] The refrigerator of this embodiment uses an adjustable high-precision potentiometer. When it is rotated to different positions, the resistance value is different. The control unit selects the corresponding program to run according to the detected voltage value. The resistance values ​​of the two voltage-dividing resistors are different, and a toggle switch is connected in parallel with the voltage-dividing resistor. The screen printing is designed on the PCB printed board, and the potentiometer is divided into N gears. The toggle switch has 3 states, that is, it can achieve compatible execution of up to 3N programs.

[0106] The refrigerator of this embodiment can greatly improve the versatility of the control panel (deployed with a control unit). It only needs to rotate the adjustable potentiometer to different gears. Different gears correspond to different programs. Different programs on the control panel match different models. As long as the programs stored in the chip are sufficient and the potentiometer is divided into N gears, up to 3N machines can use the same control panel.

[0107] The refrigerator of this embodiment increases the number of gears by 3 times by providing an adjustable potentiometer, a voltage divider circuit, and a toggle switch, and thus increases the corresponding executable programs by 3 times, greatly improving the universality of the control panel. Moreover, the adjustable potentiometer and the toggle switch are small in size and occupy less space. At the same time, the circuit is simple and the cost is more advantageous than that of the toggle switch.

[0108] Embodiment 2

[0109] The refrigerator of this embodiment includes an adjustable potentiometer RT, a voltage dividing circuit, a switch assembly, a control unit, etc. Fig.10 shown.

[0110] The adjustable potentiometer RT has an adjustable resistance. The adjustable potentiometer RT is a high-precision potentiometer with a maximum resistance of Rk. The resistance of the adjustable potentiometer RT varies with the rotation angle. When the adjustable potentiometer RT rotates one circle, its resistance changes between 0 and Rk.

[0111] The voltage divider circuit includes a plurality of voltage divider resistors connected in series; the resistance values ​​of the plurality of voltage divider resistors are different, one end of the voltage divider circuit is connected to a DC power supply VCC (such as a voltage of 5V), the other end of the voltage divider circuit is connected to one end of an adjustable potentiometer RT, and the other end of the adjustable potentiometer RT is grounded.

[0112] The switch assembly includes a plurality of switches, the plurality of switches correspond to a plurality of voltage-dividing resistors one by one, and the switches are connected in parallel at both ends of the corresponding voltage-dividing resistors, that is, a switch is connected in parallel at both ends of each voltage-dividing resistor.

[0113] The sampling port of the control unit (MCU) is connected to the connection node between the voltage divider circuit and the adjustable potentiometer RT. That is, the sampling port of the control unit collects the voltage divider on the adjustable potentiometer RT.

[0114] Each switch has two states: disconnected state and on state. When the lever 2-2 of the switch is at different positions of the connecting seat 2-1, the switch is in different states. Fig.13 , Fig.14 shown.

[0115] See also Fig.13 As shown, when the lever 2-2 of the switch is at the lower end of the connection base 2-1 of the switch, the switch is in an open state. At this time, the voltage dividing resistor corresponding to the switch plays a voltage dividing role.

[0116] See also Fig.14 As shown, when the lever 2-2 of the switch is at the upper end of the connection base 2-1 of the switch, the switch is in a closed state. At this time, the voltage dividing resistor corresponding to the switch is short-circuited and does not play a voltage dividing role.

[0117] The number of the voltage dividing resistors in the voltage dividing circuit is equal to the number of the switches in the switch assembly.

[0118] When the voltage divider circuit includes two voltage divider resistors R1 and R2, the switch combination includes two switches S1 and S2. The two ends of the voltage divider resistor R1 are connected in parallel with the switch S1, and the two ends of the voltage divider resistor R2 are connected in parallel with the switch S2. Fig.11 shown.

[0119] Each switch has two states, so switches S1 and S2 have a total of four on-off state combinations.

[0120] (1) On-off state combination 1, i.e., switches S1 and S2 are off, voltage divider resistors R1, R2, and adjustable potentiometer RT are connected in series, and the voltage value Vad collected by the AD sampling port of the control unit is VCC*RT / (R1+R2+RT).

[0121] (2) On-off state combination 2, i.e. switch S1 is off and S2 is on, the voltage divider resistor R2 is short-circuited, the voltage divider resistor R1 and the adjustable potentiometer RT are connected in series, and the voltage value Vad collected by the AD sampling port of the control unit is VCC*RT / (R1+RT).

[0122] (3) On-off state combination 3, i.e. switch S1 is on and S2 is off, the voltage divider resistor R1 is short-circuited, the voltage divider resistor R2 and the adjustable potentiometer RT are connected in series, and the voltage value Vad collected by the AD sampling port of the control unit is VCC*RT / (R2+RT).

[0123] (4) On-off state combination 4, that is, the switches S1 and S2 are turned on, the voltage-dividing resistors R1 and R2 are short-circuited, and the voltage value Vad collected by the AD sampling port of the control unit is Vad=VCC.

[0124] When both switches are turned on, that is, the fourth on-off state combination, no matter how the potentiometer is turned, the voltage value collected by the control unit remains unchanged, which is VCC. Therefore, this on-off state combination is discarded.

[0125] Assume that each time the adjustable resistor rotates a set angle, it is set to a gear, and a total of N gears are set for one rotation. The adjustable potentiometer has different resistance values ​​at different rotation angles, and the voltage value collected by the control unit is different. Therefore, the control unit can know the current gear according to the collected voltage value.

[0126] Therefore, the control unit can determine N different gear positions according to the N different voltage values ​​collected.

[0127] In any of the first three on-off state combinations of switches S1 and S2, the control unit can determine N gears according to the N different voltage values ​​collected. Therefore, in the three on-off state combinations, the control unit can determine the corresponding 3N different gears according to the 3N different voltage values ​​collected, which greatly increases the number of selectable gears.

[0128] When the voltage divider circuit includes three voltage divider resistors R1, R2, and R3, the switch combination includes three switches S1, S2, and S3. The two ends of the voltage divider resistor R1 are connected in parallel with switch S1, the two ends of the voltage divider resistor R2 are connected in parallel with switch S2, and the two ends of the voltage divider resistor R3 are connected in parallel with switch S3. Fig.12 shown.

[0129] Each switch has two states, so there are 8 on-off state combinations of switches S1, S2, and S3. Discard the state combination where all switches are on.

[0130] In any of the 7 on-off state combinations of switches S1, S2, and S3, the control unit can determine N gears according to the N different voltage values ​​collected. Therefore, in the 7 on-off state combinations, the control unit can determine the corresponding 7N different gears according to the 7N different voltage values ​​collected, which greatly increases the number of selectable gears.

[0131] When the voltage divider circuit includes m voltage divider resistors R1, R2, R3, ..., Rm, the switch combination includes m switches S1, S2, S3, ..., Sm, the two ends of the voltage divider resistor R1 are connected in parallel with switch S1, the two ends of the voltage divider resistor R2 are connected in parallel with switch S2, the two ends of the voltage divider resistor R3 are connected in parallel with switch S3, ..., the two ends of the voltage divider resistor Rm are connected in parallel with switch Sm, see Fig.10 Wherein, m is an integer greater than or equal to 2.

[0132] Each switch has two states, so there are 2 m The combination of on-off states is discarded. The combination of states where all switches are on (m switches are all on) is considered. m -1 combination of on and off states.

[0133] In the switches S1, S2, S3, ..., Sm m -1 on-off state combination, the control unit can determine N gears according to the N different voltage values ​​collected. m -1 on-off state combination, the control unit collects (2 m -1)*N different voltage values ​​can determine the corresponding (2 m -1) * N different gears, greatly increasing the number of selectable gears.

[0134] According to actual needs, determine the number of voltage divider resistors and switches to meet the number of gears required.

[0135] After selecting the number of voltage divider resistors and switches, by turning the adjustable resistor and changing the on / off state of the switch, the refrigerator can achieve (2 m -1)*Identification of N different gears.

[0136] The refrigerator of this embodiment is designed to include a plurality of voltage-dividing resistors connected in series by designing a voltage-dividing circuit; the resistance values ​​of the plurality of voltage-dividing resistors are different, one end of the voltage-dividing circuit is connected to a DC power supply, the other end of the voltage-dividing circuit is connected to one end of an adjustable potentiometer, and the other end of the adjustable potentiometer is grounded; the switch assembly includes a plurality of switches, the plurality of switches correspond to the plurality of voltage-dividing resistors one by one, and the switches are connected in parallel at both ends of the corresponding voltage-dividing resistors; the sampling port of the control unit is connected to the connection node of the voltage-dividing circuit and the adjustable potentiometer. Therefore, the refrigerator of this embodiment greatly increases the number of selectable gears by designing an adjustable potentiometer, a voltage-dividing circuit, and a switch assembly, and the switch is small in size, occupies a small space, and is easy to operate, thus solving the technical problem of a small number of gears in the prior art.

[0137] In some embodiments of the present application, the switch is a toggle switch. The toggle switch is easy to operate, and the user can change the state by toggling the lever. Moreover, the size of the toggle switch is much smaller than that of the dial switch, and it takes up little space.

[0138] The toggle switch is a two-position toggle switch, that is, the toggle switch has two states: an off state and an on state.

[0139] In some embodiments of the present application, in order to facilitate the user to identify the gear position, a plurality of gear position marks are silk-screened on the PCB printed board on which the adjustable potentiometer is installed. The plurality of gear position marks on the PCB printed board are arranged around the adjustable potentiometer. The plurality of gear position marks are on the same circumference. The gear position mark can be a name, a number, a pattern, etc.

[0140] Different gear position marks correspond to different gear positions, correspond to different rotation angles of the adjustable potentiometer, correspond to different resistance values ​​of the adjustable potentiometer, and correspond to different voltage values ​​collected by the control unit.

[0141] There are N gear position marks printed on the PCB around the adjustable potentiometer. When the adjustable potentiometer is turned to a certain gear, the control unit can know the current gear position based on the collected voltage value.

[0142] In some embodiments of the present application, the top of the adjustable potentiometer has an indicating groove, and one end of the indicating groove is in the shape of an arrow, which is used to point to the gear mark, so that the user can easily know the gear position pointed to by the adjustable potentiometer, see Figure 8 shown.

[0143] In some embodiments of the present application, the sampling port of the control unit is connected to the connection node of the voltage divider circuit and the adjustable potentiometer RT through the filter resistor R0 to eliminate noise and ensure that the control unit collects a relatively accurate voltage value.

[0144] In some embodiments of the present application, the sampling port of the control unit is grounded through a filter capacitor C1 to eliminate high-frequency noise and prevent the high-frequency noise from affecting the voltage value collected by the control unit.

[0145] In some embodiments of the present application, in order to facilitate the storage of gear information, the refrigerator also includes a storage unit.

[0146] The storage unit is used to store the voltage value and the corresponding gear information.

[0147] The control unit is connected to the storage unit, and the control unit queries the corresponding gear position from the storage unit according to the collected voltage value.

[0148] The control unit queries the storage unit according to the collected voltage value to obtain the corresponding gear position.

[0149] Specifically, the storage unit stores the AD value corresponding to the voltage value and the corresponding gear information. That is, the storage unit stores the AD value and the corresponding gear information. The control unit queries the storage unit according to the AD value corresponding to the collected voltage value to obtain the corresponding gear.

[0150] Each gear corresponds to a running program.

[0151] In some other embodiments of the present application, the storage unit is also used to store voltage values ​​and corresponding operating programs.

[0152] The control unit queries the storage unit according to the collected voltage value to obtain the corresponding gear position and the corresponding operating program.

[0153] Specifically, the storage unit stores the AD value corresponding to the voltage value and the corresponding operating program. That is, the storage unit stores the AD value and the corresponding operating program. The control unit queries the storage unit according to the AD value corresponding to the collected voltage value to obtain the corresponding gear position and the corresponding operating program.

[0154] The refrigerator of this embodiment is a refrigerator that can select program operation. By changing the state of the switch and rotating the adjustable potentiometer, the control unit determines the corresponding gear according to the detected voltage value. Each gear corresponds to a program, and then executes the corresponding program. Through the combination of the on and off states of m switches and the N gears of the adjustable potentiometer under each state combination, the number of selectable gears is (2 m -1)*N, that is, the number of programs that can be selected is (2 m -1)*N.

[0155] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0156] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A refrigerator, characterized in that include: Adjustable potentiometer; The voltage-dividing circuit comprises a first voltage-dividing resistor and a second voltage-dividing resistor having different resistance values; one end of the first voltage-dividing resistor is connected to a DC power supply, the other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, the other end of the second voltage-dividing resistor is connected to one end of the adjustable potentiometer, and the other end of the adjustable potentiometer is grounded; A toggle switch, comprising a first static contact, a moving contact, and a second static contact; the first static contact is connected to one end of the first voltage-dividing resistor, one end of the moving contact is connected to the other end of the first voltage-dividing resistor, and the second static contact is connected to the other end of the second voltage-dividing resistor; A control unit, wherein a sampling port thereof is connected to a connection node between the second voltage-dividing resistor and the adjustable potentiometer.

2. The refrigerator according to claim 1, characterized in that: The sampling port of the control unit is connected to the connection node between the second voltage-dividing resistor and the adjustable potentiometer through a filter resistor; The sampling port of the control unit is grounded through a filter capacitor.

3. The refrigerator according to claim 1, characterized in that: A plurality of gear position marks are silk-screened on the PCB printed board on which the adjustable potentiometer is installed.

4. The refrigerator according to claim 1, characterized in that: The top of the adjustable potentiometer is provided with an indicating groove, and one end of the indicating groove is in an arrow shape.

5. The refrigerator according to any one of claims 1 to 4, characterized in that: The refrigerator further comprises: A storage unit, which is used to store voltage values ​​and corresponding gear information; The control unit is connected to the storage unit, and the control unit queries the corresponding gear position from the storage unit according to the collected voltage value.

6. A refrigerator, characterized in that include: Adjustable potentiometer; A voltage divider circuit comprises a plurality of voltage divider resistors connected in series; the resistance values ​​of the plurality of voltage divider resistors are different, one end of the voltage divider circuit is connected to a DC power supply, the other end of the voltage divider circuit is connected to one end of the adjustable potentiometer, and the other end of the adjustable potentiometer is grounded; A switch assembly, comprising a plurality of switches, the plurality of switches corresponding to the plurality of voltage-dividing resistors one by one, the switches being connected in parallel at both ends of the corresponding voltage-dividing resistors; A control unit, wherein a sampling port of the control unit is connected to a connection node between the voltage divider circuit and the adjustable potentiometer.

7. The refrigerator according to claim 6, characterized in that: The sampling port of the control unit is connected to the connection node of the voltage divider circuit and the adjustable potentiometer through a filter resistor; The sampling port of the control unit is grounded through a filter capacitor.

8. The refrigerator according to claim 6, characterized in that: A plurality of gear position marks are silk-screened on the PCB printed board on which the adjustable potentiometer is installed.

9. The refrigerator according to claim 6, characterized in that: The top of the adjustable potentiometer is provided with an indicating groove, and one end of the indicating groove is in an arrow shape.

10. The refrigerator according to any one of claims 6 to 9, characterized in that: The refrigerator further comprises: A storage unit, which is used to store voltage values ​​and corresponding gear information; The control unit is connected to the storage unit, and the control unit queries the corresponding gear position from the storage unit according to the collected voltage value.

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