CN116670394A - Inspection method of water supply pump - Google Patents
Inspection method of water supply pump Download PDFInfo
- Publication number
- CN116670394A CN116670394A CN202180086471.7A CN202180086471A CN116670394A CN 116670394 A CN116670394 A CN 116670394A CN 202180086471 A CN202180086471 A CN 202180086471A CN 116670394 A CN116670394 A CN 116670394A
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- Prior art keywords
- water supply
- supply pump
- voltage
- water
- good
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
- F25C1/22—Construction of moulds; Filling devices for moulds
- F25C1/25—Filling devices for moulds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Production, Working, Storing, Or Distribution Of Ice (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
An inspection method of a water supply pump (28), the water supply pump (28) being provided in an ice maker (25) inside a refrigerator (10) for delivering water from a water supply tank (26) to an ice making tray (27), the inspection method comprising: controlling the operation of a water supply pump (28); and judging whether the water supply pump (28) is good or bad based on the voltage when the water supply pump (28) is operated. The quality of the water supply pump (28) is judged based on the voltage of the water supply pump (28) when the water supply pump is operated, and the water discharge amount of the water supply pump (28) is not required to be measured, so that the quality of the pump can be simply judged.
Description
The present invention relates to a method for inspecting a water supply pump, and more particularly, to a method for inspecting a water supply pump provided in an ice maker of a refrigerator.
Among the refrigerators in recent years, there are refrigerators including an automatic ice maker. In this automatic ice maker, a water supply tank and a water supply pump are disposed in a refrigerator, and an ice tray is disposed in a freezer. When the automatic ice maker makes ice, water stored in the water supply tank is transferred to the ice making tray by an attractive force of the water supply pump, and the water is frozen in the ice making tray, thereby making ice. For example, patent document 1 (japanese patent application laid-open No. 2003-014349) describes a refrigerator including an automatic ice maker.
In a manufacturing process of a refrigerator including an automatic ice maker, there is a testing process in which operations of various constituent devices included in the refrigerator are confirmed after an assembling process of the refrigerator is completed. In this test step, the operation of the automatic ice maker was also confirmed. Specifically, water is stored in the water supply tank, and the water supply pump is operated to confirm the flow rate of water supplied by the water supply pump, thereby confirming the operation of the automatic ice maker.
However, in the above-described background art, there is room for improvement from the viewpoint of efficiently confirming the quality of the ice maker.
Specifically, when determining whether or not the ice maker is good by confirming the discharge amount of the water supply pump, the operator needs to dispose a measuring instrument on the discharge side of the water supply pump, and visually confirm the discharge amount. Such a confirmation operation is complicated, and a long time is required.
Disclosure of Invention
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inspection method capable of judging whether an ice maker is good or bad even if the amount of water discharged is not confirmed.
The inspection method of a water supply pump according to the present invention is for inspecting a water supply pump provided in an ice maker inside a refrigerator for delivering water from a water supply tank to an ice making tray, and includes: controlling the water supply pump to operate; and judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated.
In the inspection method of the water supply pump according to the present invention, the "controlling the operation of the water supply pump" includes: controlling the water supply pump to operate in the forward rotation direction and the reverse rotation direction, and "judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated" includes: and judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated in the forward rotation direction and the voltage when the water supply pump is operated in the reverse rotation direction.
In the inspection method of the water supply pump according to the present invention, the "controlling the operation of the water supply pump" includes: operating the water supply pump in a forward rotation direction and a reverse rotation direction in a state where water is present in the water supply tank and in a state where water is not present in the water supply tank; the "judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated" includes: and determining whether the water supply pump is good or bad based on a voltage when the water supply pump is operated in a forward rotation direction and a voltage when the water supply pump is operated in a reverse rotation direction in a state where water is present in the water supply tank and in a state where water is not present in the water supply tank.
In the inspection method of a water supply pump according to the present invention, the "determining whether the water supply pump is good or bad based on the voltage at the time of operation of the water supply pump" includes: and judging whether the water supply pump is good or bad based on the voltage value detected by the conversion circuit in the refrigerator.
Effects of the invention
The inspection method of a water supply pump of the present invention is for inspecting a water supply pump that is provided in an ice maker inside a refrigerator to deliver water from a water supply tank to an ice making tray, characterized by comprising: controlling the water supply pump to operate; and judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated. Therefore, according to the inspection method of the water supply pump of the present invention, the quality of the water supply pump is determined based on the voltage at the time of operation of the water supply pump, and thus it is not necessary to measure the water discharge amount of the pump, so that the quality of the ice maker can be determined even if the water discharge amount is not confirmed.
In the inspection method of the water supply pump according to the present invention, the "controlling the operation of the water supply pump" includes: the "determining whether the water supply pump is good or bad based on the voltage at the time of operation of the water supply pump" includes: and judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated in the forward rotation direction and the voltage when the water supply pump is operated in the reverse rotation direction. Therefore, according to the inspection method of the water supply pump of the present invention, the quality of the water supply pump is determined based on the voltage when the water supply pump is operated in the forward direction and the reverse direction, whereby the quality can be more accurately determined.
In the inspection method of the water supply pump according to the present invention, the "controlling the operation of the water supply pump" includes: when there is water in the water supply tank and when there is no water in the water supply tank, the operation of the water supply pump in the forward rotation direction and the reverse rotation direction, the "determination of whether the water supply pump is good or bad based on the voltage at the time of operation of the water supply pump" includes: and determining whether the water supply pump is good or bad based on the voltage when the water supply pump is operated in the forward rotation direction and the voltage when the water supply pump is operated in the reverse rotation direction when water is present in the water supply tank and when water is not present in the water supply tank. Therefore, according to the inspection method of the water supply pump of the present invention, in the case where water is present in the water supply tank and in the case where water is not present in the water supply tank, the quality is judged based on the voltage of the water supply pump, and thus the inspection of the conversion circuit can be performed in addition to the operation confirmation of the water supply tank.
In the inspection method of a water supply pump according to the present invention, the "determining whether the water supply pump is good or bad based on the voltage at the time of operation of the water supply pump" includes: and judging whether the water supply pump is good or bad based on the voltage value detected by the conversion circuit in the refrigerator. Therefore, according to the inspection method of the water supply pump of the present invention, by using the inverter circuit in the refrigerator, it is possible to easily perform inspection using the inspection apparatus prepared externally.
Fig. 1 is a side sectional view illustrating a refrigerator according to an embodiment of the present invention.
Fig. 2 is a view illustrating a refrigerator according to an embodiment of the present invention, and is a perspective view illustrating an ice maker.
Fig. 3 is a diagram showing a refrigerator according to an embodiment of the present invention, and is a connection diagram showing a connection structure when a test of an ice maker is performed.
Fig. 4 is a diagram showing a refrigerator according to an embodiment of the present invention, and is a circuit diagram showing a conversion circuit for converting a current from a water supply pump into a voltage.
Fig. 5 is a diagram illustrating a refrigerator according to an embodiment of the present invention, and is a flowchart illustrating an inspection method of a water supply pump.
Fig. 6 (a) is a graph showing a change in voltage when water is supplied to the water supply tank and the water supply pump is a good product in the refrigerator according to the embodiment of the present invention;
fig. 6 (B) is a graph showing a change in voltage when the water supply pump is a good product and there is no water in the water supply tank in the refrigerator according to the embodiment of the present invention.
Fig. 7 (a) is a graph showing a case where a water supply pump generates a defective product and a lead wire is broken in the refrigerator according to the embodiment of the present invention;
fig. 7 (B) is a diagram showing a case where other leads are broken;
fig. 7 (C) is a diagram showing a case where the leads are connected in opposition.
Hereinafter, a refrigerator 10 according to an embodiment of the present invention will be described in detail based on the drawings. In the description of the present embodiment, the same members are denoted by the same reference numerals in principle, and duplicate descriptions are omitted. In the following description, the directions of up, down, front, rear, left and right are used, and the left and right are the left and right when the refrigerator 10 is viewed from the front.
Fig. 1 is a side sectional view showing a refrigerator 10. The heat insulating box 11 is composed of an outer box 12, an inner box 13, and a heat insulating material 14, the heat insulating box 11 constitutes a main body of the refrigerator 10, the outer box 12 is composed of a steel plate bent into a predetermined shape, the inner box 13 is disposed inside the outer box 12 and is separated from the outer box 12, the inner box 13 is composed of a synthetic resin plate, and the heat insulating material 14 is filled between the outer box 12 and the inner box 13. Inside the heat-insulating box 11, a refrigerating chamber 18 and a freezing chamber 19 are formed as storage chambers from above. The refrigerating compartment 18 and the freezing compartment 19 are separated by an insulating partition wall 23, the insulating partition wall 23 having an insulating construction.
On the inner side of the freezing chamber 19, a cooling chamber 15 is partitioned. Inside the cooling chamber 15, an evaporator 16 as a cooler is provided. Further, a machine room 20 is defined behind the lower end side of the refrigerator 10, and a compressor 22 is disposed in the machine room 20. The evaporator 16 and the compressor 22 together with a condenser and an expansion unit, not shown here, form a refrigerant compression type refrigeration cycle 21. By operating the refrigeration cycle 21, the cold air in the cooling chamber 15 is cooled by the evaporator 16, and the cold air is blown to each storage chamber by the blower 24, whereby the internal temperature of each storage chamber becomes a predetermined cooling temperature range. Specifically, the cool air blown from the blower 24 is blown to the refrigerator compartment 18 and the freezer compartment 19 via an unillustrated air-sending path. The cool air that cools the refrigerator compartment 18 and the freezer compartment 19 is returned to the cooling compartment 15 via a return air passage, not shown. With this structure, the refrigerating chamber 18 is cooled to a refrigerating temperature range, and the freezing chamber 19 is cooled to a freezing temperature range.
Inside the cooling chamber 15 and below the evaporator 16, a defrosting heater 17 is provided. With the operation of the refrigerant compression refrigeration cycle, thick frost is generated on the surface of the evaporator 16. In this way, the control unit, not shown, turns off the compressor 22, closes the cooling chamber 15, and energizes the defrosting heater 17 to heat up, thereby performing a defrosting operation of melting frost.
The icemaker 25 is a device built in the refrigerator 10 and implementing an automatic ice making function. The icemaker 25 has a water supply tank 26, a water supply pump 28, and an ice-making tray 27.
The water supply tank 26 is a tank made of a synthetic resin plate, which is disposed at the lower portion of the refrigerating chamber 18 and stores water for ice making. The user supplements water (tap water, etc.) to the water supply tank 26.
The water supply pump 28 is disposed near the water supply tank 26 in the refrigerator compartment 18, and supplies water from the water supply tank 26 to the ice making tray 27.
The ice making tray 27 is a member disposed at an upper portion of the freezing chamber 19 and configured to freeze water to make ice.
The water supply tank 26 and the water supply pump 28 are connected via a delivery pipe 32. Further, the water supply pump 28 and the ice making tray 27 are connected via a delivery pipe 31.
When the icemaker 25 makes ice, first, the user supplements water to the water supply tank 26. Next, based on an instruction from a control unit (not shown here), the water supply pump 28 transfers water in the water supply tank 26 to the ice making tray 27. The water inside the water supply tank 26 is supplied to the ice making tray 27 via the delivery pipe 32, the water supply pump 28, and the delivery pipe 31. When the water supplied to the ice making tray 27 is frozen, an ice removing process of removing ice from the ice making tray 27 is performed. Thereby, ice is stored in an ice storage container (not shown here).
Fig. 2 is a perspective view partially showing the ice maker 25.
The water supply tank 26 has a substantially rectangular parallelepiped shape, and can store water therein. A water supply pump 28 is disposed on the rear side of the water supply tank 26, and the water supply tank 26 and the water supply pump 28 are connected via a delivery pipe 32. Further, a delivery pipe 31 extends downward from the water supply pump 28.
Fig. 3 is a connection diagram showing a connection structure when the test of the ice maker 25 is performed.
The refrigerator 10 includes a water supply pump 28 and a conversion circuit 29. As described above, the water supply pump 28 has a function of delivering water from the water supply tank 26 to the ice making tray 27 by the driving force of the motor. The conversion circuit 29 converts the current supplied to the water supply pump 28 into a voltage when checking whether the water supply pump 28 is good or bad, and is incorporated in a control board that controls the cooling operation of the refrigerator 10.
The inspection machine 30 is an external device connected to the refrigerator 10 in the step of inspecting the quality of the refrigerator 10, and is, for example, a small computer programmed with a predetermined program.
The conversion circuit 29 is connected to the inspection machine 30. The conversion circuit 29 and the inspection machine 30 may be connected by a connection line or may be connected wirelessly.
Fig. 4 is a circuit diagram showing an example of the conversion circuit 29 for converting the current from the water supply pump 28 into the voltage. The conversion circuit 29 can convert the current input from the water supply pump 28 into a voltage.
One side terminal of the water supply pump 28 is connected to a non-inverting input terminal of the operational amplifier 55 via a path 33. Further, the inverting input terminal of the operational amplifier 55 is grounded via the path 35, and the resistor 50 is inserted into the path 35. The connection point 61 of the path 33 and the connection point 60 of the path 35 are connected via the path 34, and the resistor 51 is inserted into the path 34. The connection point 63 of the path 35 is connected to the inspection machine 30 via the path 36. Resistor 52 and resistor 53 are inserted into path 36.
Operational amplifier 55 is connected to a power supply via path 37 and to ground via path 38. Further, the connection point 64 of the path 37 and the connection point 62 of the path 38 are connected via the path 39. A capacitor 56 is inserted into path 39.
The output terminal of op amp 55 is connected via path 40 to connection point 65 of path 36.
One end side terminal of the resistor 54, the capacitor 57, the capacitor 58, and the diode 59 is connected to the path 36, and the other end side terminal is commonly grounded. The resistor 54, the capacitor 57, the capacitor 58, and the diode 59 are elements for stabilizing the voltage output to the inspection machine 30.
When the inspection of the water supply pump 28 is performed, a current flows through the path 33 and a voltage corresponding to the magnitude of the current is outputted to the inspection machine 30 via the operational amplifier 55, the path 40, the connection point 65, and the path 36 when the water supply pump 28 is operated. For example, the current value of the current flowing through the water supply pump 28 is Ip, and the voltage value of the voltage outputted from the conversion circuit 29 to the inspection machine 30 is Vout, vout=6.4×ip. That is, a voltage proportional to the current flowing through the water supply pump 28 is output to the inspection machine 30 via the conversion circuit 29.
Fig. 5 is a flowchart showing an inspection method of the water supply pump 28. In the manufacturing process of the refrigerator 10, after the assembly process is completed, inspection of various constituent devices such as a refrigeration cycle is performed. The inspection step of the water supply pump 28 is one of such inspections.
In step S10, after the assembly process of the refrigerator 10 is completed, the operator connects the inverter circuit 29 to the inspection machine 30 in order to determine whether the water supply pump 28 is good or bad. Specifically, the terminals of the inspection machine 30 are connected to a conversion circuit 29, and the conversion circuit 29 is a part of the control board of the refrigerator 10.
In step S11, the operator fills the water supply tank 26 with water.
In step S12, the water supply pump 28 performs forward and reverse rotation operations based on an instruction from the control device. That is, the motor, which is a part of the water supply pump 28, performs forward rotation and reverse rotation.
In step S13, based on an instruction from the control device of the inspection machine 30, the voltage output from the conversion circuit 29 when the water supply pump 28 is rotated forward and backward in step S12 is measured and recorded. Here, the control device is, for example, a control board included in the refrigerator 10 or a microcomputer included in the inspection machine 30. In the present embodiment, the operating current of the water supply pump 28 is detected as a voltage by the conversion circuit 29, and the quality of the water supply pump 28 is determined based on the voltage value.
In step S14, water is pumped from the water supply tank 26. For example, the water supply pump 28 is operated until the water stored in the water supply tank 26 is discharged based on an instruction of the control device on the refrigerator 10 side.
In step S15, the forward rotation operation and the reverse rotation operation of the water supply pump 28 are controlled in a state where there is no water in the water supply tank 26 based on an instruction from the control device.
In step S16, the voltage output from the conversion circuit 29 when the water supply pump 28 is rotated forward and backward in step S15 is measured and recorded based on an instruction from the control device of the inspection machine 30.
In step S17, the quality of the water supply pump 28 is determined based on the change in the voltage value recorded in steps S13 and S16, according to the instruction of the control device of the inspection machine 30. After the completion of step S17, a notification means such as a display or a speaker may be used to notify the operator of the quality determination.
After the completion of the above-described steps, the connection terminal of the inspection machine 30 is removed from the conversion circuit 29.
Thereafter, if the water supply pump 28 is a qualified product, the manufacturing process of the refrigerator 10 is ended in consideration of the results of other test items. On the other hand, if the water supply pump 28 is a defective product, the water supply pump 28 is replaced. Alternatively, if the connection of the water supply pump 28 and the lead wire is improper, the connection of the lead wire is corrected.
Fig. 6 (a) and 6 (B) show the water supply pump 28 and the connection thereof being normal, fig. 6 (a) is a graph showing a change in voltage when water is present in the water supply tank 26, and fig. 6 (B) is a graph showing a change in voltage when water is not present in the water supply tank 26. In the graph shown here, the horizontal axis shows time, and the vertical axis shows voltage applied to the inspection machine 30.
Referring to fig. 6 (a), when water is present in the water supply tank 26, the water supply pump 28 is reversed during the period T11, the water supply pump 28 is rotated forward during the period T12, and the water supply pump 28 is rotated backward during the period T13. The other periods are non-operation periods in which the water supply pump 28 is not operated. In this way, the operation of the water supply pump 28 when water is present in the water supply tank 26 can be confirmed, and the water supply amount of the water supply pump 28 can be confirmed. Further, when water is present in the water supply tank 26, by confirming the operation of the water supply pump 28, it is possible to check whether the forward rotation and the reverse rotation of the water supply pump 28 are correctly switched.
As is apparent from this graph, the voltage is higher during any one of the period T11, the period T12, and the period T13 than during the non-operation period. Here, by comparing the voltage during T11 with the voltage during T12, it is possible to determine whether the water supply pump 28 is good or bad.
An example of specific quality determination is described. The water supply pump 28 is configured to flow a current of 0.05A to 0.16A under no load and a current of 0.2A to 0.5A under rated load. On the other hand, the output voltage of the inverter circuit 29 is 6.4 times the current flowing in the water supply pump 28. Therefore, the output voltage of the conversion circuit 29 is 0.32V to 1.02V at no load, and the output voltage of the conversion circuit 29 is 1.28V to 3.2V at rated load. The inspection machine 30 determines whether the water supply pump 28 is good or bad based on the voltage value.
For example, if the peak voltage during the period T11 (no load on the water supply pump 28) is lower than the peak voltage during the period T12 (rated load on the water supply pump 28), it can be determined that the water supply pump 28 is a good product. That is, the water supply pump 28 has no trouble and is correctly wired to the water supply pump 28. Further, it can be confirmed that a signal for switching between the normal rotation and the reverse rotation of the water supply pump 28 is correctly output.
Referring to fig. 6a, if the peak voltage during T12 (the water supply pump 28 is rated load) is equal to or higher than a predetermined threshold voltage (for example, 1.2V), it can be determined that the water supply pump 28 is a good product.
If the voltage value at the time of forward rotation or reverse rotation of the water supply pump 28 is higher than the voltage value at the time of stop of the water supply pump 28, it can be determined that the water supply pump 28 is a good product. For example, referring to fig. 6 (a), if the voltage during T11 is higher than the voltage between the period T11 and the period T12, it can be determined that the water supply pump 28 is a good product.
Here, any one of the above-described determinations may be used, or 2 or more may be used.
Referring to fig. 6 (B), when there is no water in the water supply tank 26, the water supply pump 28 is reversed during the period T21, the water supply pump 28 is rotated forward during the period T22, and the water supply pump 28 is rotated backward during the period T23. In this way, the operation of the water supply pump 28 when no water is present in the water supply tank 26 can be confirmed.
Here, the quality of the water supply tank 26 can be judged based on the peak voltage of the T22 during the forward rotation of the water supply pump 28.
For example, if the peak voltage during the period T22 (the water supply pump 28 becomes no load) is less than a predetermined threshold voltage (for example, 1.2V), it can be determined that the water supply pump 28 is a good product. Further, by checking in a state where there is no water in the water supply pump 28, it is possible to check whether there is no water in the water supply tank 26 at the time of shipment of the refrigerator 10. At the same time, the function of the conversion circuit 29 can also be checked.
Fig. 7 (a) is a diagram showing a case where a wire is broken, fig. 7 (B) is a diagram showing a case where another wire is broken, and fig. 7 (C) is a diagram showing a case where wires are connected in opposition. In the case shown in these figures, a control signal for causing the water supply pump 28 to perform normal rotation and reverse rotation is input from the control device to the water supply pump 28 at the same timing as in the case of fig. 6 (a).
Referring to fig. 7 (a), the water supply pump 28 is not operated, and no change in the voltage value is seen. The reason for this is that the wire of the lead wire connected to the water supply pump 28 for supplying electric power is broken, or a control board or a circuit element incorporated with the conversion circuit 29 is broken.
Referring to fig. 7 (B), in all of the periods T31, T32, and T33, the water supply pump 28 is reversed, and no water supply from the water supply tank 26 is performed at all. The cause of this is breakage of the lead, the control board, or the circuit element, as in the case of fig. 7 (a).
Referring to fig. 7 (C), the water supply pump 28 is not operated, and no change in the voltage value is seen. The reason for this is that the lead wires are connected inversely with respect to the water supply pump 28.
As described above, when water is present in the water supply tank 26 and when water is not present, the water supply pump 28 is rotated in the forward and reverse directions, so that the quality of the water supply pump 28 and the connection state thereof can be accurately determined.
According to the present embodiment described above, the following main effects can be achieved.
That is, the quality of the ice maker can be judged even if the amount of water discharged is not confirmed. Specifically, the quality of the water supply pump 28 is determined based on the voltage at which the water supply pump 28 is operated, and therefore, it is not necessary to measure the water discharge amount of the pump, and therefore, the quality of the pump can be easily determined.
Further, by determining whether the water supply pump 28 is good or bad based on the voltage when the water supply pump 28 is operated in the forward direction and the reverse direction, it is possible to check the water supply pump 28 and accurately determine whether the water supply pump 28 is connected.
In addition, when water is present in the water supply tank 26 and when water is not present in the water supply tank 26, the quality of the water supply pump 28 can be determined based on the voltage of the water supply pump 28, and the quality of the water supply pump 28 can be determined in these respective states, and the inspection of the conversion circuit 29 can be performed simultaneously.
By using the conversion circuit 29 included in the refrigerator 10, inspection can be easily performed using an inspection device prepared externally.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
For example, referring to fig. 1, when water is supplied from the water supply tank 26 to the ice making tray 27, the reverse rotation operation, the forward rotation operation, and the reverse rotation operation of the water supply pump 28 can be performed based on an instruction of the control unit. By the initial reverse rotation, the accumulated water present at the front end of the transport pipe 31 is sucked up. In addition, water is supplied from the water supply tank 26 to the ice making tray 27 by the forward rotation in a state where the air is introduced into the duct 31. In addition, by the second reverse operation, the siphon phenomenon is not generated. In this way, the following can be suppressed: when melted water remains near the distal end portion of the duct 31 in a duct heater (not shown), if the duct is rotated forward during initial operation, air in the duct 31 is compressed, and water accumulated at the distal end is suddenly scattered.
Claims (10)
- A method of inspecting a water supply pump for delivering water from a water supply tank to an ice making tray in an ice making machine provided inside a refrigerator, the method comprising:controlling the water supply pump to operate; andand judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated.
- The method for inspecting a water supply pump according to claim 1, wherein,"controlling the operation of the water supply pump" includes:the water supply pump is controlled to operate in the forward rotation direction and the reverse rotation direction,the "judging whether the water supply pump is good or bad based on the voltage at the time of operation of the water supply pump" includes: and judging whether the water supply pump is good or bad based on the voltage when the water supply pump is operated in the forward rotation direction and the voltage when the water supply pump is operated in the reverse rotation direction.
- The method for inspecting a water supply pump according to claim 1, wherein,"controlling the operation of the water supply pump" includes:controlling the water supply pump to operate in a forward rotation direction and a reverse rotation direction in a state that water exists in the water supply tank and in a state that water does not exist in the water supply tank,the "judging whether the water supply pump is good or bad based on the voltage at the time of operation of the water supply pump" includes: and determining whether the water supply pump is good or bad based on a voltage when the water supply pump is operated in a forward rotation direction and a voltage when the water supply pump is operated in a reverse rotation direction in a state where water is present in the water supply tank and in a state where water is not present in the water supply tank.
- The inspection method of a water supply pump according to any one of claims 1 to 3, wherein "judging whether the water supply pump is good or bad based on a voltage at the time of operation of the water supply pump" includes: and judging whether the water supply pump is good or bad based on the voltage value detected by the conversion circuit in the refrigerator.
- The inspection method of a water supply pump according to claim 3, wherein "judging whether the water supply pump is good or bad based on a voltage at the time of operation of the water supply pump" includes: and in a state where water is present in the water supply tank, if the peak voltage during reverse rotation of the water supply pump is lower than the peak voltage during normal rotation of the water supply pump at the time of rated load of the water supply pump, determining that the water supply pump is qualified.
- The inspection method of a water supply pump according to claim 3, wherein "judging whether the water supply pump is good or bad based on a voltage at the time of operation of the water supply pump" includes:and in the state that water exists in the water supply tank, if the peak voltage of the water supply pump is larger than the threshold voltage during the normal rotation of the water supply pump when the water supply pump is rated to be loaded, judging that the water supply pump is qualified.
- The inspection method of a water supply pump according to claim 3, wherein "judging whether the water supply pump is good or bad based on a voltage at the time of operation of the water supply pump" includes:and in a state that the water supply tank is not filled with water, if the peak voltage during the forward rotation of the water supply pump is smaller than the threshold voltage when the water supply pump is not loaded, judging that the water supply pump is qualified.
- The inspection method of a water supply pump according to claim 3, wherein "judging whether the water supply pump is good or bad based on a voltage at the time of operation of the water supply pump" includes:if the voltage value does not change, it is determined that an electric wire connected to the water supply pump is disconnected or a control board or a circuit element is damaged.
- The inspection method of a water supply pump according to claim 3, wherein "judging whether the water supply pump is good or bad based on a voltage at the time of operation of the water supply pump" includes:if the voltage value does not change, it is determined that the lead wire is connected to the water supply pump in reverse.
- The inspection method of a water supply pump according to claim 3, wherein "judging whether the water supply pump is good or bad based on a voltage at the time of operation of the water supply pump" includes:if the water supply pump is reversed and water is not supplied from the water supply tank in all the time periods, it is determined that an electric wire connected to the water supply pump is broken or a control board or a circuit element is damaged.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020216016A JP2022101755A (en) | 2020-12-25 | 2020-12-25 | Method for inspecting water supply pump |
| JP2020-216016 | 2020-12-25 | ||
| PCT/CN2021/139787 WO2022135351A1 (en) | 2020-12-25 | 2021-12-20 | Water supply pump inspection method |
Publications (1)
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| CN116670394A true CN116670394A (en) | 2023-08-29 |
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| CN202180086471.7A Pending CN116670394A (en) | 2020-12-25 | 2021-12-20 | Inspection method of water supply pump |
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| JP (1) | JP2022101755A (en) |
| CN (1) | CN116670394A (en) |
| WO (1) | WO2022135351A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| IN190197B (en) * | 1995-12-21 | 2003-06-28 | Lg Electronics Inc | |
| JP2012082688A (en) * | 2010-10-06 | 2012-04-26 | Panasonic Corp | Drive control device of electric pump |
| KR101535009B1 (en) * | 2014-02-06 | 2015-07-24 | 현대자동차주식회사 | Method for judging state of cooling water |
| CN204636250U (en) * | 2015-03-23 | 2015-09-16 | 佛山市顺德区美的洗涤电器制造有限公司 | A kind of dish-washing machine and draining pump operating condition checkout gear thereof |
| CN208431175U (en) * | 2018-06-22 | 2019-01-25 | 浙江源控节能科技有限公司 | Water pump safety detection circuit |
| CN110165964B (en) * | 2019-06-10 | 2020-09-04 | 爱科赛智能科技(浙江)有限公司 | Intelligent control method and control device for alternating-current submersible pump |
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2020
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2021
- 2021-12-20 WO PCT/CN2021/139787 patent/WO2022135351A1/en active Application Filing
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| JP2022101755A (en) | 2022-07-07 |
| WO2022135351A1 (en) | 2022-06-30 |
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