CN210201488U - Main and auxiliary controller switching circuit and water supply equipment - Google Patents
Main and auxiliary controller switching circuit and water supply equipment Download PDFInfo
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- CN210201488U CN210201488U CN201921496545.0U CN201921496545U CN210201488U CN 210201488 U CN210201488 U CN 210201488U CN 201921496545 U CN201921496545 U CN 201921496545U CN 210201488 U CN210201488 U CN 210201488U
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Abstract
The utility model provides a main controller switching circuit and water supply equipment, wherein, the two ends of a normally open contact I of a first intermediate relay are respectively connected with one end of a normally closed contact of a second intermediate relay and one end of an external power supply, and the two ends of a coil of the first intermediate relay are respectively connected with one end of a first switch device and the other end of the external power supply; the other end of a first normally closed contact of a second intermediate relay is connected with the power supply input end of the main controller, two ends of a coil of the second intermediate relay are respectively connected with the fault signal output end of the main controller and the other end of the external power supply, and two ends of a first normally open contact of the second intermediate relay are respectively connected with the power supply input end of the auxiliary controller and one end of the external power supply; the other end of the first switch device is connected with one end of an external power supply; the power output ends of the main controller and the sub-controller are respectively connected with the other end of the external power supply. The utility model discloses can practice thrift manpower and materials and reduce the water supply cost.
Description
Technical Field
The utility model relates to a water supply equipment technical field especially relates to a master and slave controller switching circuit and water supply equipment.
Background
Most of water supply equipment in the existing market are single in configuration, and due to the fact that an unstable factor exists in a power grid, the probability that a programmable controller fails is high, equipment cannot be timely repaired when the programmable controller fails, and water supply safety is seriously affected. And some manual power frequency starting water pumps supply water during faults, the problems that the water pressure is too high or the flow is too low and the like due to too much or too little starting water pumps can occur under the condition, and workers need to stay on duty for a long time to cause great invariance to community users and managers.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a master and slave controller switching circuit and water supply equipment to not enough in the conventional art.
In one embodiment, the utility model provides a master controller switching circuit is applied to water supply equipment, include: the system comprises a main controller, a sub-controller and a first switching module; the first switching module comprises a first switching device, a first intermediate relay and a second intermediate relay;
the two ends of a normally open contact I of the first intermediate relay are respectively connected with one end of a normally closed contact of the second intermediate relay and one end of an external power supply, and the two ends of a coil of the first intermediate relay are respectively connected with one end of the first switching device and the other end of the external power supply;
the other end of the normally closed contact of the second intermediate relay is connected with the power supply input end of the main controller, the two ends of the coil of the second intermediate relay are respectively connected with the fault signal output end of the main controller and the other end of the external power supply, and the two ends of the normally open contact of the second intermediate relay are respectively connected with the power supply input end of the auxiliary controller and one end of the external power supply;
the other end of the first switch device is connected with one end of an external power supply; the power output ends of the main controller and the sub-controller are respectively connected with the other end of the external power supply.
In one embodiment, the device further comprises a second switching circuit; the second switching circuit includes a second switching device, a third intermediate relay, and a fourth intermediate relay;
two ends of a normally open contact of a third intermediate relay are respectively connected with one end of a normally closed contact of the second intermediate relay and one end of an external power supply, and two ends of a coil of the third intermediate relay are respectively connected with a first end of a second switching device and the other end of the external power supply;
two ends of a normally open contact of a fourth intermediate relay are respectively connected with the power supply input end of the auxiliary controller and one end of an external power supply, and two ends of a coil of the fourth intermediate relay are respectively connected with the second end of the second switching device and the other end of the external power supply;
and the third end of the second switching device is connected with one end of an external power supply through a normally closed contact of the first intermediate relay.
In one embodiment, the first switching module further comprises a timer and a fifth intermediate relay;
the power supply input end of the timer is connected with one end of the first switching device, and the signal output end of the timer is connected with one end of a coil of the fifth intermediate relay;
the other end of the coil of the fifth intermediate relay is connected with the other end of the external power supply, the two ends of the normally closed contact of the fifth intermediate relay are respectively connected with one end of the normally open contact I of the first intermediate relay and one end of the normally closed contact of the second intermediate relay, and the two ends of the normally open contact of the fifth intermediate relay are respectively connected with the power input end of the auxiliary controller and one end of the external power supply.
In one embodiment, the first switching module further comprises a sixth intermediate relay;
the two ends of the coil of the sixth intermediate relay are respectively connected with the fault signal output end of the auxiliary controller and the other end of the external power supply, the two ends of the normally closed contact of the sixth intermediate relay are respectively connected with the power input end of the auxiliary controller and one end of the normally open contact of the fourth intermediate relay, and the two ends of the normally open contact of the sixth intermediate relay are respectively connected with the power input end of the main controller and one end of the external power supply.
In one embodiment, the first switching module further comprises a sixth intermediate relay;
two ends of a coil of the sixth intermediate relay are respectively connected with the fault signal output end of the auxiliary controller and the other end of the external power supply, and two ends of a normally closed contact of the sixth intermediate relay are respectively connected with the power supply input end of the auxiliary controller and one end of a normally open contact of the fifth intermediate relay; and two ends of a normally open contact of the sixth intermediate relay are respectively connected with the power input end of the main controller and one end of an external power supply.
In one embodiment, two ends of the normally open contact II of the first intermediate relay are respectively connected with one end of an external power supply and one end of the normally open contact of the fifth intermediate relay.
In one embodiment, the timer is KG316T time controlled switch or ZYT02 time controlled switch.
In one embodiment, the first switching device is a circuit breaker.
On the other hand, the embodiment of the utility model provides a still provide a water supply equipment, including master controller switching circuit.
In one embodiment, the water supply equipment comprises one or a combination of variable-frequency water supply equipment and non-negative-pressure water supply equipment.
The utility model discloses a main control unit switching circuit and water supply equipment, the coil circular telegram normally open contact actuation of first auxiliary relay after closing first switching device, main control unit begins work. When the main controller breaks down, the coil of the second intermediate relay is electrified and the normally closed contact is disconnected, the normally open contact is closed, and the main controller stops working and the auxiliary controller replaces the main controller to start working. The utility model discloses each embodiment secondary control ware can in time start the operation when main control unit breaks down, has effectively guaranteed the continuity of supplying water. The utility model discloses main and auxiliary control ware's switching circuit and water supply equipment simple structure can practice thrift manpower and materials simultaneously and reduce the water supply cost.
Drawings
In order to illustrate the technical solution of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 shows a first structure diagram of a master-slave switching circuit according to an embodiment of the present invention;
fig. 2 shows a second schematic structure diagram of the master-slave switching circuit according to the embodiment of the present invention;
fig. 3 shows a third structural schematic diagram of a master-slave switching circuit according to an embodiment of the present invention;
fig. 4 shows a fourth schematic structure diagram of the master-slave switching circuit according to the embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a water supply device according to an embodiment of the present invention.
Detailed Description
Hereinafter, various embodiments of the present invention will be described more fully. The present invention is capable of various embodiments and of being modified and varied therein. However, it should be understood that: there is no intention to limit the scope of the invention to the specific embodiments disclosed herein, but rather, the invention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the invention.
Hereinafter, the terms "includes" or "may include" used in various embodiments of the present invention indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to refer only to the particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combination of the foregoing.
In various embodiments of the present invention, the expression "at least one of a or/and B" includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The term "user" as used in various embodiments of the present invention may indicate a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. Terms such as those defined in commonly used dictionaries will be interpreted as having a meaning that is the same as a contextual meaning in the related art and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein in various embodiments of the present invention.
Referring to fig. 1, in one embodiment, the present invention provides a switching circuit for primary and secondary controllers, which is applied to a water supply device, including: the main controller 110, the sub-controller 120, and a first switching module; the first switching module includes a first switching device 130, a first intermediate relay, and a second intermediate relay;
the two ends of a normally open contact 1A-1 of the first intermediate relay are respectively connected with one end of a normally closed contact 2B of the second intermediate relay and one end of an external power supply, and the two ends of a coil 1M of the first intermediate relay are respectively connected with one end of a first switch device 130 and the other end of the external power supply;
the other end of the normally closed contact 2B of the second intermediate relay is connected to the power input end of the main controller 110, the two ends of the coil 2M of the second intermediate relay are respectively connected to the fault signal output end of the main controller 110 and the other end of the external power supply, and the two ends of the normally open contact 2B of the second intermediate relay are respectively connected to the power input end of the sub-controller 120 and one end of the external power supply;
the other end of the first switching device 130 is connected to one end of an external power supply; the power output terminals of the main controller 110 and the sub-controller 120 are connected to the other end of the external power supply, respectively.
When the first switching device 130 is closed, the coil 1M of the first intermediate relay is energized, and the normally open contact 1A-1 thereof attracts the main controller 110 to start to operate. When the main controller 110 fails, a fault signal is output to the fault signal output end, at this time, the coil 2M of the second intermediate relay is energized, and the normally closed contact 2B thereof is disconnected from the normally open contact 2A for attraction, so that the main controller 110 automatically stops working, and the sub-controller 120 starts to work. When the main controller 110 is recovered to normal, the fault signal is eliminated, the coil 2M of the second intermediate relay loses power, the normally closed contact 2B attracts the normally open contact 2A to be disconnected, so that the sub controller 120 automatically stops working, and the main controller 110 is put into operation again. The main controller 110 and the sub-controller 120 are PLC programmable controllers, and the external power source is AC220V AC.
The utility model discloses master and auxiliary control ware switching circuit, coil 1M circular telegram normally open contact 1A-1 actuation of first auxiliary relay after closing first switching device 130, main control unit 110 begins work. When the main controller 110 fails, the coil 2M of the second intermediate relay is energized to the normally closed contact 2B and is disconnected, and the normally open contact 2A is closed, so that the main controller 110 stops working and the sub-controller 120 replaces the main controller 110 to start working. The embodiment of the utility model provides a sub-controller 120 can in time start the operation when main control unit 110 breaks down, has effectively guaranteed the continuity of supplying water. The utility model discloses main and auxiliary control ware switches circuit simple structure can practice thrift manpower and materials simultaneously and reduce the water supply cost.
Referring to fig. 2, in a specific embodiment, a second switching circuit is further included; the second switching circuit includes a second switching device 140, a third intermediate relay, and a fourth intermediate relay;
both ends of a normally open contact 3A of the third intermediate relay are connected to one end of a normally closed contact 2B of the second intermediate relay and one end of an external power supply, respectively, and both ends of a coil 3M of the third intermediate relay are connected to a first end of the second switching device 140 and the other end of the external power supply, respectively;
both ends of a normally open contact 4A of the fourth intermediate relay are respectively connected to the power input end of the sub-controller 120 and one end of the external power supply, and both ends of a coil 4M of the fourth intermediate relay are respectively connected to the second end of the second switching device 140 and the other end of the external power supply;
the third terminal of the second switching device 140 is connected to one terminal of the external power supply through the normally closed contact 2B of the first intermediate relay.
The second switching circuit plays a role of manually switching the main controller and the auxiliary controller, when the main controller and the auxiliary controller are manually switched, the first switching device 130 is switched off, at the moment, the coil of the first intermediate relay is powered off, the normally open contact 1A-1 is switched off, and the normally closed contact 1B is switched on. The second switching device 140 is a selector switch, and when the main controller 110 is selected to operate, the first end of the second switching device 140 is connected to the coil 3M of the third intermediate relay, and at this time, the coil 3M of the third intermediate relay is energized, and the normally open contact 3A thereof closes the main controller 110 to start operating. When the sub-controller 120 is selected to operate, the second switching device 140 is disconnected from the coil 3M of the third intermediate relay, and the coil 4M of the fourth intermediate relay is selected to be turned on, at this time, the coil 4M of the fourth intermediate relay is energized, and the normally open contact 4A thereof closes the main controller 110 to start operating.
The utility model discloses master controller switching circuit can be according to actual need manual switching water supply equipment's master and auxiliary control ware, is convenient for supply water for the user, makes master and auxiliary control ware work in turn simultaneously, prevents controller overload work, prolongs the life of equipment.
Referring to fig. 3, in a specific embodiment, the first switching module further includes a timer 150 and a fifth intermediate relay;
a power input end of the timer 150 is connected with one end of the first switching device 130, and a signal output end of the timer 150 is connected with one end of the coil 5M of the fifth intermediate relay;
the other end of the coil 5M of the fifth intermediate relay is connected to the other end of the external power supply, both ends of the normally closed contact 5B of the fifth intermediate relay are respectively connected to one end of the normally open contact 1A-1 of the first intermediate relay and one end of the normally closed contact 2B of the second intermediate relay, and both ends of the normally open contact 5A of the fifth intermediate relay are respectively connected to the power input end of the sub-controller 120 and one end of the external power supply.
The first switching module plays a role of automatically switching the main controller and the sub controller. When the second switching device is turned off and the first switching device 130 is closed, the timer 150 is powered on to start timing, when the preset time is reached, the main controller 110 is put into operation, and when the preset time is reached, the timer 150 sends a trigger signal to connect the fifth intermediate relay. At this time, the coil 5M of the fifth intermediate relay is energized, the normally closed contact 5B thereof is opened, so that the main controller 110 automatically stops operating, and the normally open contact 5A thereof attracts the sub-controller 120 to automatically operate.
The utility model discloses master controller switching circuit can make water supply equipment work in turn automatically to can be according to the actual demand if make letting master and slave controller switch work daytime and night, help realizing that master and slave controller operating time is unanimous, thereby prolong the life of equipment.
Referring to fig. 4, in a particular embodiment, the first switching module further includes a sixth intermediate relay;
two ends of a coil 6M of the sixth intermediate relay are respectively connected with the fault signal output end of the auxiliary controller 120 and the other end of the external power supply, and two ends of a normally closed contact 6B of the sixth intermediate relay are respectively connected with the power supply input end of the auxiliary controller 120 and one end of a normally open contact 5A of the fifth intermediate relay; both ends of the normally open contact 6A of the sixth intermediate relay are connected to the power input terminal of the main controller 110 and one end of the external power supply, respectively.
In the case of automatically switching the operation of the main and sub controllers, when the time of the timer 150 reaches the time of the operation of the sub controller 120, if the sub controller 120 fails, a failure signal is sent to the failure signal output terminal thereof to turn on the sixth intermediate relay. At this time, the coil 6M of the sixth intermediate relay is energized, the normally closed contact 6B is opened, and the normally open contact 6B is closed, so that the sub-controller 120 automatically stops working and the main controller 110 starts working.
The utility model discloses main control unit switching circuit in time switches to main control unit 110 when sub-control unit 120 trouble, guarantees the continuity of supplying water, and is multiple functional.
Referring to fig. 4, in a particular embodiment, the first switching module further includes a sixth intermediate relay;
two ends of a coil 6M of the sixth intermediate relay are respectively connected with the fault signal output end of the auxiliary controller 120 and the other end of the external power supply, two ends of a normally closed contact 6B of the sixth intermediate relay are respectively connected with the power input end of the auxiliary controller 120 and one end of a normally open contact 4A of the fourth intermediate relay, and two ends of the normally open contact 6A of the sixth intermediate relay are respectively connected with the power input end of the main controller 110 and one end of the external power supply.
Under the condition of manually switching the work of the main controller and the auxiliary controller, when the auxiliary controller 120 is selected to work, if the auxiliary controller 120 fails, a fault signal is sent to the fault signal output end of the auxiliary controller to switch on a sixth intermediate relay. At this time, the coil 6M of the sixth intermediate relay is energized, the normally closed contact 6B is opened, and the normally open contact 6A is closed, so that the sub-controller 120 automatically stops working and the main controller 110 starts working.
The utility model discloses main control unit switching circuit in time switches to main control unit 110 when sub-control unit 120 trouble, guarantees the continuity of supplying water, and is multiple functional.
Referring to fig. 4, in a specific embodiment, two ends of the normally open contact two 1A-2 of the first intermediate relay are respectively connected with one end of the external power supply and one end of the normally open contact 5A of the fifth intermediate relay.
The utility model discloses main control unit switching circuit when sub-controller 120 is at work but need the stop work, can ensure to break off sub-controller 120's working circuit in time and completely.
In one specific embodiment, the timer is KG316T time-controlled switch or ZYT02 time-controlled switch.
The utility model discloses master controller switching circuit, its timer can adopt KG316T time switch or ZYT02 time switch, and is with low costs and the precision is high, can effectively guarantee to switch master and slave controller at the preset time accurately.
In a specific embodiment, the first switching device is a circuit breaker.
Referring to fig. 5, in an embodiment, the present invention further provides a water supply apparatus, including a main controller switching circuit 510.
It should be noted that the main-controller switching circuit in this embodiment has the same limitations as those of the main-controller switching circuits in the above embodiments, and is not described herein again.
The utility model discloses water supply equipment, including main control unit switching circuit, the coil circular telegram normal open contact actuation of first auxiliary relay after closing first switching device, main control unit begins work. When the main controller breaks down, the coil of the second intermediate relay is electrified and the normally closed contact is disconnected, the normally open contact is closed, and the main controller stops working and the auxiliary controller replaces the main controller to start working. The utility model discloses each embodiment secondary control ware can in time start the operation when main control unit breaks down, has effectively guaranteed the continuity of supplying water. The utility model discloses main and auxiliary control ware's switching circuit and water supply equipment simple structure can practice thrift manpower and materials simultaneously and reduce the water supply cost.
In a specific embodiment, the water supply equipment comprises one or a combination of variable frequency water supply equipment and non-negative pressure water supply equipment.
The utility model discloses water supply equipment application scope is wide, and the reducible staff condition of staying on duty, the user of being convenient for more uses.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario. The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (10)
1. A master-slave switching circuit, applied to a water supply device, comprising: the system comprises a main controller, a sub-controller and a first switching module; the first switching module comprises a first switching device, a first intermediate relay and a second intermediate relay;
two ends of a normally open contact I of the first intermediate relay are respectively connected with one end of a normally closed contact of the second intermediate relay and one end of an external power supply, and two ends of a coil of the first intermediate relay are respectively connected with one end of the first switch device and the other end of the external power supply;
the other end of the normally closed contact of the second intermediate relay is connected with the power supply input end of the main controller, two ends of a coil of the second intermediate relay are respectively connected with the fault signal output end of the main controller and the other end of the external power supply, and two ends of the normally open contact of the second intermediate relay are respectively connected with the power supply input end of the auxiliary controller and one end of the external power supply;
the other end of the first switch device is connected with one end of the external power supply; and the power output ends of the main controller and the secondary controller are respectively connected with the other end of the external power supply.
2. The master-slave switching circuit of claim 1, further comprising a second switching circuit; the second switching circuit includes a second switching device, a third intermediate relay, and a fourth intermediate relay;
two ends of a normally open contact of the third intermediate relay are respectively connected with one end of a normally closed contact of the second intermediate relay and one end of the external power supply, and two ends of a coil of the third intermediate relay are respectively connected with the first end of the second switching device and the other end of the external power supply;
two ends of a normally open contact of the fourth intermediate relay are respectively connected with the power supply input end of the auxiliary controller and one end of the external power supply, and two ends of a coil of the fourth intermediate relay are respectively connected with the second end of the second switching device and the other end of the external power supply;
and the third end of the second switching device is connected with one end of the external power supply through the normally closed contact of the first intermediate relay.
3. The master-slave switching circuit of claim 1, wherein the first switching module further comprises a timer and a fifth intermediate relay;
a power supply input end of the timer is connected with one end of the first switching device, and a signal output end of the timer is connected with one end of a coil of the fifth intermediate relay;
the other end of the coil of the fifth intermediate relay is connected with the other end of the external power supply, the two ends of the normally closed contact of the fifth intermediate relay are respectively one end of the normally open contact I of the first intermediate relay and one end of the normally closed contact of the second intermediate relay, and the two ends of the normally open contact of the fifth intermediate relay are respectively connected with the power input end of the auxiliary controller and one end of the external power supply.
4. The master-slave switching circuit of claim 2, wherein the first switching module further comprises a sixth intermediate relay;
the both ends of sixth intermediate relay's coil are connected respectively the fault signal output of auxiliary control ware with external power source's the other end, the both ends of sixth intermediate relay's normally closed contact are connected respectively the power input of auxiliary control ware with the one end of fourth intermediate relay's normally open contact, the both ends of sixth intermediate relay's normally open contact are connected respectively the power input of main control unit with external power source's one end.
5. The master-slave switching circuit of claim 3, wherein the first switching module further comprises a sixth intermediate relay;
two ends of a coil of the sixth intermediate relay are respectively connected with the fault signal output end of the auxiliary controller and the other end of the external power supply, and two ends of a normally closed contact of the sixth intermediate relay are respectively connected with the power supply input end of the auxiliary controller and one end of a normally open contact of the fifth intermediate relay; and two ends of a normally open contact of the sixth intermediate relay are respectively connected with the power input end of the main controller and one end of the external power supply.
6. The master-slave switching circuit according to claim 3, wherein both ends of the second normally open contact of the first intermediate relay are respectively connected to one end of the external power supply and one end of the normally open contact of the fifth intermediate relay.
7. The master-slave switching circuit of claim 3, wherein the timer is KG316T time controlled switch or ZYT02 time controlled switch.
8. A master-slave switching circuit according to claim 1, wherein the first switching means is a circuit breaker.
9. A water supply apparatus, characterized by comprising the main controller switching circuit of any one of claims 1 to 8.
10. The water supply apparatus of claim 9, wherein the water supply apparatus comprises one or a combination of a variable frequency water supply apparatus and a non-negative pressure water supply apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921496545.0U CN210201488U (en) | 2019-09-09 | 2019-09-09 | Main and auxiliary controller switching circuit and water supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921496545.0U CN210201488U (en) | 2019-09-09 | 2019-09-09 | Main and auxiliary controller switching circuit and water supply equipment |
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| Publication Number | Publication Date |
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| CN210201488U true CN210201488U (en) | 2020-03-27 |
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| CN201921496545.0U Active CN210201488U (en) | 2019-09-09 | 2019-09-09 | Main and auxiliary controller switching circuit and water supply equipment |
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| CN (1) | CN210201488U (en) |
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- 2019-09-09 CN CN201921496545.0U patent/CN210201488U/en active Active
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Denomination of utility model: Main and standby controller switching circuit and water supply equipment Effective date of registration: 20200629 Granted publication date: 20200327 Pledgee: Science City (Guangzhou) Finance Leasing Co.,Ltd. Pledgor: GUANGZHOU BAIYUAN PUMP Group Ltd. Registration number: Y2020980003573 |
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