Door locks, door lock controls, and household appliances

Abstract

The present disclosure relates to a door lock, a door lock control device, and a household appliance. The door lock includes: a door contact switch for opening and closing in response to the opening and closing of a door of the household appliance; a locking contact switch; and a door lock driver for controlling the locking of the door independently of the opening and closing of the door contact switch and in conjunction with the locking contact switch. The locking contact switch and the door lock driver are connected in parallel, a parallel node between the locking contact switch and the door lock driver is connected to a third connection terminal, the door contact switch and the door lock driver are connected in parallel, a parallel node between the door contact switch and the door lock driver is connected to the third connection terminal, and the door contact switch and the locking contact switch are connected in parallel, a parallel node between the door contact switch and the door lock driver is connected to the third connection terminal. Thus, the safety of the household appliance can be ensured even if the door of the household appliance is opened abnormally.

Description

Technical Field

[0001] The present disclosure relates to the technical field of household appliances, and in particular to a door lock, a door lock control device, and a household appliance. Background Art

[0002] In related art, for household appliance door locks, the opening and closing of the appliance door triggers a response from the door contact switch, which then uses a door detection circuit to provide feedback to a control unit regarding the door's open / closed status. Upon detecting that the appliance door is properly closed, the control unit activates the door lock actuator to lock the appliance door. This actuator, in turn, triggers a response from the lock contact switch, which then uses the lock detection circuit to provide feedback to the control unit regarding the door's locked status.

[0003] However, to ensure the safety of household appliances during operation, the appliance door must be closed, the door contact switch must be engaged, the door lock must be locked, and the locking contact switch must be engaged before other loads can be powered on. If the appliance door is abnormally opened, the door contact switch will be opened (also called "opened"), but the locking contact switch will remain closed and unable to open. Therefore, power to other loads will not be cut off, making it difficult to ensure the safety of the household appliance. In other words, since power to other loads cannot be cut off when the appliance door is abnormally opened, the safety of the household appliance is reduced.

[0004] Therefore, how to improve the safety of household appliances when the door of the household appliances is opened abnormally is one of the problems that need to be solved. Summary of the Invention

[0005] In view of this, the present disclosure provides a door lock, a door lock control device, and a home appliance, thereby ensuring the safety of the home appliance even when the door of the home appliance is abnormally opened.

[0006] According to a first aspect of the present disclosure, a door lock is provided for use in a household appliance, comprising: a door contact switch (7) for opening and closing in response to the opening and closing of a door of the household appliance; a locking contact switch (8); and a door lock driver (9) for controlling the locking of the door independently of the opening and closing of the door contact switch (7) and in conjunction with the locking contact switch (8), wherein the locking contact switch (8) and the door lock driver (9) are connected in parallel, and the locking contact switch (8) is in a closed position. ) and the door lock driver (9) are connected in parallel to the third connection terminal (42), the door contact switch (7) and the door lock driver (9) are connected in parallel, and the parallel node of the door contact switch (7) and the door lock driver (9) is connected to the third connection terminal (42), the door contact switch (7) and the locking contact switch (8) are connected in parallel, and the parallel node of the door contact switch (7) and the locking contact switch (8) is connected to the third connection terminal (42).

[0007] In one possible implementation, the door lock driver (9) disconnects the locking contact switch (8) in response to receiving an unlocking command from a control unit (14), wherein the control unit (14) sends the unlocking command to the door lock driver (9) when the machine door is abnormally opened.

[0008] In a possible implementation, the two ends of the door contact switch (7) are respectively connected to the first connection terminal (40) and the third connection terminal (42), the two ends of the door lock driver (9) are respectively connected to the second connection terminal (41) and the third connection terminal (42), and the two ends of the locking contact switch (8) are respectively connected to the third connection terminal (42) and the fourth connection terminal (43).

[0009] In a possible implementation, the door lock further includes: a door opening driver (24) for controlling the opening of the machine door (3), wherein the door opening driver (24) is connected between the door contact switch (7) and the first connection terminal (40).

[0010] In a possible implementation, the door lock further includes: a temperature sensor (23) having a characteristic that resistance increases with increasing temperature, wherein when the door lock is abnormally driven, the temperature of the temperature sensor (23) increases, and the two ends of the temperature sensor (23) are respectively connected to a first node and the third connection terminal (42), wherein the first node is a node shared by the door contact switch (7) and the door lock driver (9).

[0011] According to a second aspect of the present disclosure, a door lock control device is provided, comprising: the above-mentioned door lock; a control unit (14); a door detection circuit (15), two ends of which are respectively connected to a first connection terminal (40) and the control unit (14), for feeding back to the control unit (14) a first state indicating whether the door contact switch (7) is open or closed; a first power supply terminal (16), which is connected to the third connection terminal (42), for supplying power to the door lock; a lock detection circuit (17), two ends of which are respectively connected to a fourth connection terminal (43) and the control unit (14), for feeding back to the control unit (14) a second state indicating whether the door lock is locked or unlocked; a second power supply terminal (18); and a first control switch (19), two ends of which are respectively connected to the second connection terminal (41) and the second power supply terminal (18), and the opening and closing of the first control switch (19) is controlled by the control unit (14).

[0012] In a possible implementation, the door lock control device further includes: another load (20), one end of which is connected to the fourth connection terminal (43); a third power supply terminal (21); and a second control switch (22), two ends of which are respectively connected to the other end of the other load (20) and the third power supply terminal (21), and the opening and closing of the second control switch (22) is controlled by the control unit (14).

[0013] In one possible implementation, the second power terminal (18) and the third power terminal (21) have the same polarity, and the polarity of the second power terminal (18) and the third power terminal (21) is opposite to the polarity of the first power terminal (16).

[0014] According to a third aspect of the present disclosure, a door lock control device is provided, comprising: the door lock described above; a control unit (14); a door detection circuit (15), the two ends of which are respectively connected to the first connection terminal (40) and the control unit (14), for feeding back to the control unit (14) a first state indicating whether the door contact switch (7) is open or closed; a first power supply terminal (16), which is connected to the third connection terminal (42), for supplying power to the door lock; a lock detection circuit (17), the two ends of which are respectively connected to the fourth connection terminal (43) and the control unit (14), for feeding back to the control unit (14) a first power supply terminal (16), which is connected to the third connection terminal (42), for supplying power to the door lock; and a lock detection circuit (17), the two ends of which are respectively connected to the fourth connection terminal (43) and the control unit (14), for feeding back to the control unit (14) a first state indicating whether the door contact switch (7) is open or closed. The control unit (14) feeds back a second state for indicating whether the door lock is locked or unlocked; a second power supply terminal (18); a first control switch (19), two ends of which are respectively connected to the second connection terminal (41) and the second power supply terminal (18), and the opening and closing of the first control switch (19) is controlled by the control unit (14); a fourth power supply terminal (25); and a third control switch (26), two ends of which are respectively connected to the first connection terminal (40) and the fourth power supply terminal (25), and the opening and closing of the third control switch (26) is controlled by the control unit (14).

[0015] In one possible implementation, the second power terminal (18) and the fourth power terminal (25) have the same polarity, and the polarity of the second power terminal (18) and the fourth power terminal (25) is opposite to the polarity of the first power terminal (16).

[0016] According to a fourth aspect of the present disclosure, a household appliance is provided, comprising: the above-mentioned door lock; and / or the above-mentioned door lock control device.

[0017] According to the door lock, door lock control device, and household appliance disclosed herein, a parallel circuit is formed between the door contact switch, the door lock driver, and the lock contact switch, with the third connection terminal as the common terminal. Regardless of whether the door contact switch is open or closed, the door lock driver can control the locking of the door in conjunction with the lock contact switch. Thus, when the door of the household appliance is abnormally opened, regardless of whether the door contact switch is open or closed, the door lock driver can open the lock contact switch, thereby mechanically disconnecting the power supply circuit of other loads connected to the third connection terminal, thereby ensuring the safety of the household appliance. Therefore, even when the door of the household appliance is abnormally opened, the safety of the household appliance can be ensured, thereby improving the reliability of the household appliance.

[0018] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0020] Figure 1 Schematic diagram of a door lock for a household appliance in the related art.

[0021] Figure 2 is a block diagram of a door lock of a home appliance according to the present exemplary embodiment.

[0022] Figure 3 is a block diagram of a door lock of a home appliance according to the present exemplary embodiment.

[0023] Figure 4 is a block diagram of a door lock of a home appliance according to the present exemplary embodiment.

[0024] Figure 5 is a block diagram of a door lock control apparatus for a home appliance according to the present exemplary embodiment.

[0025] Figure 6 is a block diagram of a door lock control apparatus for a home appliance according to the present exemplary embodiment.

[0026] Figure 7 is a block diagram of a door lock control apparatus for a home appliance according to the present exemplary embodiment. DETAILED DESCRIPTION

[0027] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0028] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0029] In addition, numerous specific details are provided in the following detailed description to better illustrate the present disclosure. Those skilled in the art will appreciate that the present disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main points of the present disclosure.

[0030] See also Figure 1 In patent publication CN101080528B, the door lock includes: connecting terminals 11, 12, and 13; a door contact switch 7 that responds to the closing of the appliance door 3; a door lock actuator 9 electrically connected in series with the door contact switch 7; and a lock contact switch 8, whose switch state indicates whether the appliance door 3 is locked or unlocked. If the appliance door 3 is closed, the door contact switch 7 closes in response. The door lock actuator 9 can be controlled by supplying power, for example, in a pulsed manner, via the first and second connecting terminals 12 and 11. Activating the door lock actuator 9 locks the appliance door 3, closing the lock contact switch 8.

[0031] However, to ensure the safety of the household appliance during operation, it is necessary to close the door 3 and the door contact switch 7, control the door lock driver 9 via the first connection terminal 12 and the second connection terminal 11 to lock the door 3 so that the door lock is engaged, close the lock contact switch 8, and then energize other loads (not shown) connected to the connection terminal 13. If the door 3 is abnormally opened, the door contact switch 7 is disconnected, but the lock contact switch 8 remains closed and cannot be disconnected. Therefore, the power supply to other loads connected to the connection terminal 13 is not cut off, making it difficult to ensure the safety of the household appliance.

[0032] Therefore, as described above, since the power supply to other loads connected to the connection terminal 13 is not cut off when the door 3 is abnormally opened, the safety of the home appliance is low.

[0033] Therefore, considering that the door contact switch 7 and the door lock actuator 9 are connected in series between the first connection terminal 12 and the second connection terminal 11, the door lock actuator 9 can only be driven when the door contact switch 7 is closed. If the door 3 is abnormally opened, the door contact switch 7 is disconnected, and the door lock actuator 9 cannot be driven. The unactivated door lock actuator 9 naturally cannot perform the unlocking action to disconnect the lock contact switch 8, and thus cannot mechanically cut off the power supply to other loads, making it difficult to ensure the safety of the household appliance.

[0034] On this basis, it is further thought that: when the machine door 3 is opened abnormally, if the door lock drive 9 is not unable to be driven due to the door contact switch 7 being disconnected, then when the machine door 3 is opened abnormally, the (driven) door lock drive 9 can be used to disconnect the locking contact switch 8 regardless of the opening and closing of the door contact switch 7, thereby disconnecting the power supply of other loads connected to the connection terminal 13.

[0035] Therefore, the present disclosure proposes a door lock. Compared with the door contact switch and the door lock driver being connected in series between two connection terminals, the door contact switch and the door lock driver of the door lock of the present disclosure are connected in parallel, and the parallel node of the door contact switch and the door lock driver is connected to the third connection terminal serving as the common end. Thus, even when the machine door is opened abnormally, although the door contact switch is disconnected, the door lock driver will not be unable to be driven due to the disconnection of the door contact switch. On the contrary, the door lock driver can be driven to disconnect the locking contact switch without being affected by the disconnection of the door contact switch, thereby disconnecting the power supply of other loads connected to the third connection terminal serving as the common end, thereby ensuring the safety of household appliances, thereby solving the problems described above.

[0036] Based on the above concept, Figures 2 to 4 The door lock shown and Figures 5 to 7 The door lock control device shown, the aforementioned door lock and door lock control device can be applied to household appliances, which may include but are not limited to dishwashers, clothes washing machines, etc.

[0037] See also Figure 2 The door lock of this exemplary embodiment may include a door contact switch 7 , a lock contact switch 8 , and a door lock driver 9 .

[0038] The door contact switch 7 is configured to open and close in response to the opening and closing of the door of the household appliance. In this embodiment, the opening and closing of the door can trigger the door contact switch 7 to respond, wherein the door contact switch 7 is opened in response to the opening of the household appliance door and is closed in response to the closing of the household appliance door.

[0039] The door lock driver 9 controls the locking of the door independently of the opening and closing of the door contact switch 7 and in conjunction with the lock contact switch 8. The door contact switch 7 and the door lock driver 9 are connected in parallel, and the parallel node of the door contact switch 7 and the door lock driver 9 is connected to the third connection terminal 42.

[0040] In this embodiment, compared with Figure 1The door contact switch 7 and the door lock driver 9 are connected in series between the first connection terminal 12 and the second connection terminal 11. In the present disclosure, the third connection terminal 42 is used as a common terminal. The door contact switch 7 and the door lock driver 9 are connected in parallel. The parallel node of the door contact switch 7 and the door lock driver 9 is N1, and the parallel node N1 is connected to the third connection terminal 42. Thus, by connecting the door contact switch 7 and the door lock driver 9 in parallel, the door lock driver 9 can control the locking of the machine door in conjunction with the lock contact switch 8, regardless of the opening and closing of the door contact switch 7.

[0041] The door contact switch 7 and the locking contact switch 8 are connected in parallel, and the parallel node of the door contact switch 7 and the locking contact switch 8 is connected to the third connection terminal 42. In this embodiment, the door contact switch 7 and the locking contact switch 8 are connected in parallel, and the parallel node of the door contact switch 7 and the locking contact switch 8 is N1 or N2, which is connected to the third connection terminal 42.

[0042] The locking contact switch 8 and the door lock driver 9 are connected in parallel, and the parallel node of the locking contact switch 8 and the door lock driver 9 is connected to the third connection terminal 42. In this embodiment, the locking contact switch 8 and the door lock driver 9 are connected in parallel, and the parallel node of the locking contact switch 8 and the door lock driver 9 is N1 or N2, and the parallel node N1 or N2 is connected to the third connection terminal 42.

[0043] Therefore, the door lock of this embodiment uses the third connection terminal 42 as the common end, and forms parallel connections between the door contact switch 7, the door lock driver 9 and the locking contact switch 8, and the parallel nodes of the parallel connections are all connected to the third connection terminal 42.

[0044] In this way, in order to ensure the safety of the household appliance during operation, the door can be closed, the door contact switch 7 is closed, the door lock is locked, and the locking contact switch 8 is closed. Then, other loads connected to the third connection terminal 42 ( Figures 2 to 4 If the appliance door is abnormally opened, the door contact switch 7 is disconnected. Since the door contact switch 7 and the door lock driver 9 are connected in parallel, the door lock driver 9 can be driven to disconnect the locking contact switch 8 without being affected by the disconnection of the door contact switch 7 (i.e., regardless of the opening and closing of the door contact switch 7). This disconnects the power supply to other loads connected to the third connection terminal 42 serving as the common end, thereby ensuring the safety of the household appliance.

[0045] Therefore, according to the door lock of this exemplary embodiment, compared with the door contact switch and the door lock driver being connected in series between two connection terminals, the door contact switch and the door lock driver of the door lock disclosed herein are connected in parallel, and the parallel node of the door contact switch and the door lock driver is connected to the third connection terminal serving as a common end. Thus, even when the machine door is opened abnormally, the door lock driver can be driven to disconnect the locking contact switch regardless of the disconnection of the door contact switch, thereby disconnecting the power supply of other loads connected to the third connection terminal serving as the common end. Therefore, the power supply of other loads can be mechanically cut off, thereby ensuring the safety of the household appliance, thereby improving the reliability of the use of the household appliance.

[0046] In a possible implementation, the door lock driver 9 responds to the self-control unit ( Figures 2 to 4 The control unit (not shown) receives an unlocking command and turns off the lock contact switch 8, wherein the control unit sends an unlocking command to the door lock driver 9 when the machine door is abnormally opened.

[0047] In this embodiment, when the door is abnormally opened, the control unit sends an unlocking command to the door lock driver 9. Since, when the door is abnormally opened, although the door contact switch 7 is disconnected, the door lock driver 9 is connected in parallel with the door contact switch 7, and thus the door lock driver 9 can still be driven, and thus the door lock driver 9 can still receive the unlocking command and can still disconnect the locking contact switch 8 according to the unlocking command, thereby mechanically cutting off other loads connected to the third connection terminal 42 ( Figures 2 to 4 (not shown) power supply, thereby ensuring the safety of household appliances.

[0048] Therefore, even if the household appliance is opened abnormally, the door lock driver 9 can disconnect the locking contact switch 8 in response to receiving the unlocking command from the control unit, thereby ensuring the safety of the household appliance and further improving the reliability of the use of the household appliance.

[0049] See also Figure 2 The two ends of the door contact switch 7 are respectively connected to the first connecting terminal 40 and the third connecting terminal 42, the two ends of the door lock driver 9 are respectively connected to the second connecting terminal 41 and the third connecting terminal 42, and the two ends of the locking contact switch 8 are respectively connected to the third connecting terminal 42 and the fourth connecting terminal 43.

[0050] In this embodiment, the door contact switch 7 is connected between the first connection terminal 40 and the parallel node N1, the door lock actuator 9 is connected between the parallel node N1 and the second connection terminal 41, and the locking contact switch 8 is connected between the parallel node N2 and the fourth connection terminal 43. The parallel nodes N1 and N2 are connected to the third connection terminal 42. Therefore, with the third connection terminal 42 as the common terminal, parallel connections are formed between the door contact switch 7, the door lock actuator 9, and the locking contact switch 8, and the parallel nodes of the parallel connections are all connected to the third connection terminal 42.

[0051] See also Figure 3 The door lock may further include a door opening driver 24 for controlling the opening of the machine door 3 , wherein the door opening driver 24 is connected between the door contact switch 7 and the first connection terminal 40 .

[0052] In this embodiment, the door opening driver 24 and the door contact switch 7 are connected in series between the parallel node N1 and the first connecting terminal 40. The series circuit of the door opening driver 24 and the door contact switch 7 is connected in parallel with the door locking driver 9. The parallel node of the series circuit of the door opening driver 24 and the door contact switch 7 and the door locking driver 9 is node N1. The node N1 is connected to the third connecting terminal 42. Therefore, the parallel connection of the series circuit of the door opening driver 24 and the door contact switch 7 and the door locking driver 9 uses the third connecting terminal 42 as the common end.

[0053] When the door contact switch 7 is off, the door opening actuator 24 cannot be driven. Conversely, when the door contact switch 7 is closed, the door opening actuator 24 is driven, which can release the elastic energy storage structure in the closed door lock, and directly or indirectly apply the energy of the elastic energy storage structure to the closed door, so that the closed door is opened, thereby realizing the function of electrically controlled door opening.

[0054] See also Figure 4 The door lock may further include a temperature sensor 23, which has a characteristic that its resistance increases with increasing temperature. When the door lock is abnormally driven, the temperature of the temperature sensor 23 increases. The two ends of the temperature sensor 23 are respectively connected to the first node and the third connection terminal 42. The first node is a node shared by the door contact switch 7 and the door lock driver 9.

[0055] In this embodiment, the temperature sensor 23 (also called "temperature sensitive element") is connected between the parallel node N1 and the parallel node N2. The parallel node N1 is connected to the second connection terminal 41 via the door lock driver 9, and the parallel node N2 is connected to the third connection terminal 42.

[0056] Therefore, the temperature sensor 23 and the door lock driver 9 are connected in series between the second connection terminal 41 and the third connection terminal 42. The temperature sensor 23 can protect the door lock driver 9 and prevent damage to the door lock driver 9 caused by abnormal driving, thereby protecting the door lock driver 9 from damage caused by abnormal driving. At the same time, the temperature sensor 23, the door contact switch 7 and the door opening driver 24 are connected in series between the first connection terminal 40 and the third connection terminal 42. The temperature sensor 23 can also protect the door opening driver 24 and prevent damage to the door opening driver 24 caused by abnormal driving, thereby protecting the door opening driver 24 from damage caused by abnormal driving.

[0057] Therefore, compared with the independent circuits of the door opening driver 24 and the door locking driver 9, which require a temperature sensor to be set for each of the door opening driver 24 and the door locking driver 9 to protect each other, the present disclosure merges the circuits of the door opening driver 24 and the door locking driver 9, so that the door opening driver 24 and the door locking driver 9 can share a temperature sensor 23, thereby reducing material costs and protecting the door locking driver 9 or the door opening driver 24 from damage caused by abnormal driving.

[0058] See also Figure 5 , the door lock control device may include: Figures 2 to 4 any one of the door locks; a control unit 14; a door detection circuit 15, both ends of which are respectively connected to the first connection terminal 40 and the control unit 14, for feeding back to the control unit 14 a first state indicating whether the door contact switch 7 is open or closed; a first power supply terminal 16, which is connected to the third connection terminal 42, for supplying power to the door lock; a lock detection circuit 17, both ends of which are respectively connected to the fourth connection terminal 43 and the control unit 14, for feeding back to the control unit 14 a second state indicating whether the door lock is locked or unlocked; a second power supply terminal 18; and a first control switch 19, both ends of which are respectively connected to the second connection terminal 41 and the second power supply terminal 18, and the opening and closing of the first control switch 19 is controlled by the control unit 14.

[0059] In this embodiment, power is supplied to the door lock via the first power terminal 16 connected to the third connection terminal 42. The door contact switch 7 is connected to the door detection circuit 15 via the first connection terminal 40. The door detection circuit 15 provides feedback of the open / closed state of the door contact switch 7 to the control unit 14. Based on this open / closed state, the control unit 14 can determine whether the door contact switch 7 is open or closed.

[0060] Specifically, when the door is closed, the door contact switch 7 is closed, and the door detection circuit 15 feeds back a closed state indicating that the door contact switch 7 is closed to the control unit 14. Based on this closed state, the control unit 14 can determine that the door contact switch 7 is closed. Conversely, when the door is opened, the door contact switch 7 is opened, and the door detection circuit 15 feeds back an open state indicating that the door contact switch 7 is opened to the control unit 14. Based on this open state, the control unit 14 can determine that the door contact switch 7 is opened.

[0061] The second power terminal 18 and the first control switch 19 are connected in series to the second connection terminal 41, and the first control switch 19 is controlled by the control unit 14. The control unit 14 can close the first control switch 19, thereby forming a closed circuit between the first power terminal 16 and the second power terminal 18, thereby activating the door lock actuator 9. If the control unit 14 sends an unlock command to the door lock actuator 9, the door lock actuator 9 opens the lock contact switch 8, thereby unlocking the door. Similarly, if the control unit 14 sends a lock command to the door lock actuator 9, the door lock actuator 9 closes the lock contact switch 8, thereby locking the door.

[0062] The lock contact switch 8 is connected to the lock detection circuit 17 via the fourth connection terminal 43. The lock detection circuit 17 provides feedback to the control unit 14 regarding the locked or unlocked state of the door lock. Specifically, if the lock contact switch 8 is closed, the lock detection circuit 17 provides feedback to the control unit 14 indicating that the door lock is locked. The control unit 14 can detect that the door lock is locked based on this locked state. Conversely, if the lock contact switch 8 is open, the lock detection circuit 17 provides feedback to the control unit 14 indicating that the door lock is unlocked. The control unit 14 can detect that the door lock is unlocked based on this unlocked state.

[0063] The control unit 14 may receive the closed state / open state fed back by the door detection circuit 15 , may also receive the locked state / unlocked state fed back by the lock detection circuit 17 , and may also issue an instruction to close or open the first control switch 19 .

[0064] See also Figure 6 The door lock control device may further include: another load 20, one end of which is connected to the fourth connection terminal 43; a third power supply terminal 21; and a second control switch 22, both ends of which are respectively connected to the other end of the other load 20 and the third power supply terminal 21, and the opening and closing of the second control switch 22 is controlled by the control unit 14.

[0065] In this embodiment, power is supplied to other loads 20 through the door lock, ensuring that other loads 20, such as motors and heaters, can operate even when the door is locked. The other loads 20, the second control switch 22, and the third power terminal 21 are connected in series at the fourth connection terminal 43. The control unit 14 can close or open the second control switch 22. When both the locking contact switch 8 and the second control switch 22 are closed, a closed circuit is formed between the first power terminal 16 and the third power terminal 21, providing power to the other loads 20 and allowing them to operate.

[0066] In a possible implementation, the second power terminal 18 and the third power terminal 21 have the same polarity, and the polarity of the second power terminal 18 and the third power terminal 21 is opposite to the polarity of the first power terminal 16 .

[0067] See also Figure 7 , the door lock control device may include: Figures 2 to 4 any one of the door locks; a control unit 14; a door detection circuit 15, wherein both ends are connected to the first connection terminal 40 and the control unit 14 respectively, for feeding back to the control unit 14 a first state indicating whether the door contact switch 7 is open or closed; a first power supply terminal 16, which is connected to the third connection terminal 42, for supplying power to the door lock; a lock detection circuit 17, wherein both ends are connected to the fourth connection terminal 43 and the control unit 14 respectively, for feeding back to the control unit 14 a second state indicating whether the door lock is locked or unlocked; a second power supply terminal 18; a first control switch 19, wherein both ends are connected to the second connection terminal 41 and the second power supply terminal 18 respectively, and the opening and closing of the first control switch 19 is controlled by the control unit 14; a fourth power supply terminal 25; and a third control switch 26, wherein both ends are connected to the first connection terminal 40 and the fourth power supply terminal 25 respectively, and the opening and closing of the third control switch 26 is controlled by the control unit 14.

[0068] In this embodiment, power is supplied to the door lock via the first power terminal 16 connected to the third connection terminal 42. The door contact switch 7 is connected to the door detection circuit 15 via the first connection terminal 40. The door detection circuit 15 provides feedback of the open / closed state of the door contact switch 7 to the control unit 14. Based on this open / closed state, the control unit 14 can determine whether the door contact switch 7 is open or closed.

[0069] Specifically, when the door is closed, the door contact switch 7 is closed, and the door detection circuit 15 feeds back a closed state indicating that the door contact switch 7 is closed to the control unit 14. Based on this closed state, the control unit 14 can determine that the door contact switch 7 is closed. Conversely, when the door is opened, the door contact switch 7 is opened, and the door detection circuit 15 feeds back an open state indicating that the door contact switch 7 is opened to the control unit 14. Based on this open state, the control unit 14 can determine that the door contact switch 7 is opened.

[0070] The second power terminal 18 and the first control switch 19 are connected in series to the second connection terminal 41, and the first control switch 19 is controlled by the control unit 14. The control unit 14 can close the first control switch 19, thereby forming a closed circuit between the first power terminal 16 and the second power terminal 18, thereby activating the door lock actuator 9. If the control unit 14 sends an unlock command to the door lock actuator 9, the door lock actuator 9 opens the lock contact switch 8, thereby unlocking the door. Similarly, if the control unit 14 sends a lock command to the door lock actuator 9, the door lock actuator 9 closes the lock contact switch 8, thereby locking the door.

[0071] The lock contact switch 8 is connected to the lock detection circuit 17 via the fourth connection terminal 43. The lock detection circuit 17 provides feedback to the control unit 14 regarding the locked or unlocked state of the door lock. Specifically, if the lock contact switch 8 is closed, the lock detection circuit 17 provides feedback to the control unit 14 indicating that the door lock is locked. The control unit 14 can detect that the door lock is locked based on this locked state. Conversely, if the lock contact switch 8 is open, the lock detection circuit 17 provides feedback to the control unit 14 indicating that the door lock is unlocked. The control unit 14 can detect that the door lock is unlocked based on this unlocked state.

[0072] The control unit 14 may receive the closed state / open state fed back by the door detection circuit 15 , may also receive the locked state / unlocked state fed back by the lock detection circuit 17 , and may also issue an instruction to close or open the first control switch 19 .

[0073] The fourth power terminal 25 and the third control switch 26 are connected in series to the first connection terminal 40, and the third control switch 26 is controlled by the control unit 14. The control unit 14 can close the third control switch 26 to form a closed circuit between the first power terminal 16 and the fourth power terminal 25. When the door opening actuator 24 is actuated, it can release the elastic energy storage structure within the closed door lock, and the energy of the elastic energy storage structure can be directly or indirectly applied to the closed door to open the closed door, thereby realizing the function of electrically controlled door opening.

[0074] In a possible implementation, the second power terminal 18 and the fourth power terminal 25 have the same polarity, and the polarity of the second power terminal 18 and the fourth power terminal 25 is opposite to the polarity of the first power terminal 16 .

[0075] The present disclosure also provides a household appliance, which may include Figures 2 to 4 Any door lock; and / or Figures 5 to 7 Any door lock control device.

[0076] While various embodiments of the present disclosure have been described above, the foregoing description is intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A door lock, used in household appliances, characterized in that: include: a door contact switch (7) for opening and closing in response to the opening and closing of the door of the household appliance; Locking contact switch (8); as well as A door lock driver (9) is used to control the locking of the machine door in conjunction with the locking contact switch (8) regardless of the opening and closing of the door contact switch (7). The locking contact switch (8) and the door lock driver (9) are connected in parallel, and the parallel node of the locking contact switch (8) and the door lock driver (9) is connected to the third connecting terminal (42). The door contact switch (7) and the door lock driver (9) are connected in parallel, and the parallel node of the door contact switch (7) and the door lock driver (9) is connected to the third connection terminal (42). The door contact switch (7) and the locking contact switch (8) are connected in parallel, and a parallel node of the door contact switch (7) and the locking contact switch (8) is connected to the third connection terminal (42).

2. The door lock according to claim 1, characterized in that The door lock driver (9) disconnects the locking contact switch (8) in response to receiving an unlocking command from a control unit (14), wherein the control unit (14) sends the unlocking command to the door lock driver (9) when the machine door is abnormally opened.

3. The door lock according to claim 1 or 2, characterized in that: The two ends of the door contact switch (7) are connected to the first connecting terminal (40) and the third connecting terminal (42) respectively. The two ends of the door lock driver (9) are connected to the second connecting terminal (41) and the third connecting terminal (42) respectively. The two ends of the locking contact switch (8) are respectively connected to the third connecting terminal (42) and the fourth connecting terminal (43).

4. The door lock according to claim 3, characterized in that: Also includes: A door opening driver (24) for controlling the opening of the machine door (3). The door opening driver (24) is connected between the door contact switch (7) and the first connection terminal (40).

5. The door lock according to claim 3, characterized in that: Also includes: The temperature sensor (23) has a characteristic that its resistance increases as the temperature rises, When the door lock is abnormally driven, the temperature of the temperature sensor (23) increases. The two ends of the temperature sensor (23) are respectively connected to a first node and the third connection terminal (42), and the first node is a node shared by the door contact switch (7) and the door lock driver (9).

6. The door lock according to claim 4, characterized in that Also includes: The temperature sensor (23) has a characteristic that its resistance increases as the temperature rises, When the door lock is abnormally driven, the temperature of the temperature sensor (23) increases. The two ends of the temperature sensor (23) are respectively connected to a first node and the third connection terminal (42), and the first node is a node shared by the door contact switch (7) and the door lock driver (9).

7. A door lock control device, characterized in that: include: The door lock according to any one of claims 1 to 6; a control unit (14); a door detection circuit (15), two ends of which are respectively connected to the first connection terminal (40) and the control unit (14), and are used to feed back to the control unit (14) a first state indicating whether the door contact switch (7) is open or closed; a first power supply terminal (16), connected to the third connection terminal (42) and used to supply power to the door lock; a lock detection circuit (17), two ends of which are respectively connected to the fourth connection terminal (43) and the control unit (14), and are used to feed back to the control unit (14) a second state indicating whether the door lock is locked or unlocked; a second power terminal (18); as well as The first control switch (19) has two ends connected to the second connection terminal (41) and the second power supply terminal (18) respectively, and the opening and closing of the first control switch (19) is controlled by the control unit (14).

8. The door lock control device according to claim 7, characterized in that: Also includes: Another load (20), one end of which is connected to the fourth connection terminal (43); a third power supply terminal (21); as well as The second control switch (22) has two ends connected to the other end of the other load (20) and the third power supply terminal (21) respectively, and the opening and closing of the second control switch (22) is controlled by the control unit (14).

9. The door lock control device according to claim 8, characterized in that: The second power terminal (18) and the third power terminal (21) have the same polarity, and the polarity of the second power terminal (18) and the third power terminal (21) is opposite to the polarity of the first power terminal (16).

10. A door lock control device, characterized in that: include: The door lock according to claim 4; a control unit (14); a door detection circuit (15), two ends of which are respectively connected to the first connection terminal (40) and the control unit (14), and are used to feed back to the control unit (14) a first state indicating whether the door contact switch (7) is open or closed; a first power supply terminal (16), connected to the third connection terminal (42) and used to supply power to the door lock; a lock detection circuit (17), two ends of which are connected to the fourth connection terminal (43) and the control unit (14) respectively, and are used to feed back to the control unit (14) a second state indicating whether the door lock is locked or unlocked; a second power terminal (18); a first control switch (19), two ends of which are respectively connected to the second connection terminal (41) and the second power supply terminal (18), and the opening and closing of the first control switch (19) is controlled by the control unit (14); a fourth power terminal (25); and The third control switch (26) has two ends connected to the first connection terminal (40) and the fourth power supply terminal (25) respectively, and the opening and closing of the third control switch (26) is controlled by the control unit (14).

11. The door lock control device according to claim 10, characterized in that: The second power terminal (18) and the fourth power terminal (25) have the same polarity, and the polarity of the second power terminal (18) and the fourth power terminal (25) is opposite to the polarity of the first power terminal (16).

12. A household appliance, characterized in that: include: The door lock according to any one of claims 1 to 6; and / or The door lock control device according to any one of claims 7 to 11.

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