JPS60501835A - Mechanically operated pressure switch with solid parts - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] have solid parts mechanically actuated pressure switch The present invention relates to the control of electric motors, and more particularly to the energization of submerged pump electric motors. The invention relates to machines that control machines and control switches with solid parts.

Background of the invention Fluid pressure responsive switches are well known and are used to preset the fluid pressure in a tank. a buried tank that supplies fluid under pressure from the well to the receiving tank while the pressure is lower than the It has long been used to control the behavior of the electric motor that drives the 2F0. of this shape An example of control is U.S. Pat. No. 2,741,678 and U.S. Pat. No. 372. Control devices containing these patented features are now widely used. However, in some pumping facilities, the pump motor is For damage that occurs when the rate of recovery of is lower than the rate of fluid removal from the well. May not be protected. As disclosed in U.S. Patent No. 3,345,480 A pressure switch allows the well conditions to pump the equipment's fluid within a preset pressure range. of low water pump conditions by energizing the scraper motor to maintain pressure. This is to prevent damage to the motor under the The fluid level in the well is pumped When the desired system pressure is below the level that maintains it, the switch It operates in a way that prevents the machine from operating. Another pressure switch for submersible pump motor One improvement is shown in U.S. Pat. No. 4,020,308, which describes a fluid switch. Discloses a device that includes an indicator light on the cover of the device. U.S. Patent No. 41 20,608 Pressure switches of the type included in No. 1 are used when the pump motor is energized +1. to see when It is particularly suitable for use in pump devices where it is desirable to have a visual display.

Summary of the invention The mechanical pressure and other switch components according to the invention are housed in one container. It is. In a preferred embodiment of the invention, the container has a pair of... Lower hole for housing fluid pressure responsive components and snap-action switch components 1. A pressure-responsive section in the lower nozzle section for wiring and adjustment purposes. Separate or plug-in connections provide convenient access to components and wire terminals. Snaps on the lower housing part - solid and other electrical connections connected to the switch terminals. and an upper housing portion for containing air components. upper housing The ring section contains solid parts, relays, and current/current/voltage detectors. ” some ・The musing part can be accessed from the top or front and can be programmed to operate the solid-state circuit. Also includes a calibration button that is adapted to calibrate. - The housing part is the pump electric It also includes a position indicator light that is coded to provide a visual indication of the type of machine failure.

One object of the invention is that one segment incorporates a pressure-responsive snap-acting mechanism. and the other segment includes a segment two housing that contains the solid state switch components. In addition to providing control equipment for pump motors with snap switches, plug-in type Electrical connections are made to make electrical connections with other parts of the control device.

Another purpose is to install solid parts to monitor the operating status of the motor. In addition to providing a control device for a pump motor that has the ability to Used respectively to calibrate solid parts and provide light indication of pump motor operating status. The object of the present invention is to provide a housing having a switch button and an indicator light.

Another purpose is to detect fluctuations in the fluid pressure supplied by the pump and Detects when the load on the motor is lower than the normal value and detects when the motor is in fixed rotor or Detects when pump cycles are running too long or too short. It also detects when the input voltage of the motor is excessively high or low. An object of the present invention is to provide a control device for a pump motor having parts that include the following.

Another purpose is to detect and provide signals representing the voltage, current and power factor of the motor. A control for a pump electric motor that also includes parts that control the operation of the electric motor according to signals. The purpose is to provide equipment.

Another purpose is to provide a signal representing the pressure output of the pump driven by the electric motor; and components that detect and supply signals representing the motor's current, voltage, and power factor. control device for the pump motor with Snap-action mechanical switch mechanism and electric motor depending on voltage, current and power factor An object of the present invention is to provide a device including electronic components for controlling the operation of a device.

Other objects and features of the invention include having solid parts incorporating features of the invention. A specification describing a preferred embodiment in which a mechanically actuated pressure switch is illustrated; It will be readily apparent to those skilled in the art from the accompanying drawings.

Drawing description 1 and 1A are cross-sectional front views of a pump motor control device including the present invention. ·vinegar, FIG. 2 is another cross-sectional front view of the switch in FIG. 1, FIG. 6 is a diagram showing some functional relationships of the parts of the control device shown in FIG. FIG. 4 is a diagram showing the interrelationship of parts of the control device shown in FIG. FIG. 5 is a diagram showing the operating range of the control device in FIG. 1, Figure 6 is a flow diagram of the flow diagram utilized by the control logic of the motor controller of Figure 1. This is a diagram.

DESCRIPTION OF THE PREFERRED EMBODIMENT From the drawings, a control including a pressure switch mechanism 12 and a microprocessor type controller is shown. The device 10 is manufactured by Carl A. No. 6,340,372, issued to and incorporated herein by reference. It is equipped with mechanical pressure-responsive components as shown. The control device 10 controls the pump and The electric motor that drives the well and the pump is buried in the fluid in the well and placed above ground. Particularly suitable for use in implantable pump devices that supply fluid under pressure to vessels. .

As disclosed in the Schafer patent, pressure switch mechanism 12 is mounted on support 16. attached and movable contacts in response to changes in pressure applied to the diaphragm mechanism 14; a diaphragm mechanism 14 for actuating a snap-acting mechanism 18 including 20; Ru. The diaphragm mechanism 14 is connected between a fluid container (not shown) and a fitting 24. in response to changes in fluid pressure applied through a connected fluid conduit (not shown). It includes a flexure diaphragm 22 that is moved as the diaphragm 22 moves. The snap action mechanism 18 moves in response to movement of aphram 22 and causes snap-acting movement of member 30 Includes member 26. A member 30 passing through the arm portion, an insulating contact linkage 66, and a conductive Member 68 provides support for movable contact 20 and allows diaphragm 22 to be selected. a pair of stationary contacts 32 which have a snap action in response to a pressure less than the Connect the contacts 20. The member 30 also absorbs the pressure exerted on the diaphragm 22. Is contact 20 a contact that has a snap action when is larger than a preselected value? pull away.

Stationary contacts 32 are attached to insulated terminal blocks 34 which are in turn attached by supports 16. is attached. As shown most clearly in Figures 1A and 6, the static The points have contacts 36 and 37 giving the first pair and contacts 38 and 39 giving the second pair. The block 34 includes four contacts 36-39 placed on the block 34 as two pairs of contacts.

Contacts 36-39 are mounted on L-shaped terminal members 40-43, respectively, and The members 40-43 have leg portions to which the associated contacts 36-39 are secured. The leg portions receive terminal screws 44-47, respectively. Terminal member 40- 43, e.g. 5 terminals, i.e. the terminals 50 are mounted on their own individual insulating blocks 51. and includes a terminal screw 52 and members 40-43, e.g., terminal member 40 is described below. They are coupled by prongs 56 that electrically couple with terminal members 40 as shown. insulation Block 51 is fixed to block 34 by screws 53.

As shown in FIGS. 1A and 3, contact linkage 66 is V-shaped in nature; The platform arm has a bridge conductive member 68 having a pair of contacts 36-39 located at each end thereof. It is installed. Contacts 36-39 are cooperating and adjacent pairs of stationary contacts 32. placed in such a position that it joins with

1 and 6, the pressure switch 10 is connected to the cover 70, as will be explained later. contacts when removed to allow access to terminal screws 44-66 and terminal screws 50. Continued. As shown, one side of the alternating current source (not shown) is connected to conductor 72 and The other side of the AC source is connected to the terminal 40 via the terminal screw 44, and the other side of the AC source is connected to the It is connected to the fifth terminal 50 via a screw 52 which has been tightened. disclosed here The AC motor γ6 in the embodiment includes the conductors 78 and 80 and the terminal screws 4 tightened. 5 and 46 to terminals 44 and 42, respectively.

As detailed in U.S. Pat. No. 6,340,372, support 16 is Equipped with twin bosses. A distance spring 79 is placed around one of the posts 81; A differential spring 82 is placed around the other of the paired posts. The upper end of the distance spring 79 captured by a nut 86 screwed into the threaded end 88 of the stop 81 and the switch The camp washer 84 is used to adjust the pressure working distance of 10. ing. The lower end of the distance spring 79 is relatively thick from which a pair of posts including the post 81 come out. It contacts the free end of the apertured member or lever 26 and applies a force thereto. teeth The amount of force exerted on lever 26 by screw 79 is determined by adjustment of nand 86. It is determined by Movement of member 26 through a toggle mechanism including toggle spring 90 This will be communicated to 3o.

As shown in FIG. The top washer 92 is constantly biased by the differential spring 82. The spring 82 is compressed by a nut 94 supported by a cup 96 placed on the upper end of the holder.

In a preferred embodiment, cover 70 is separated into separate parts 100 and 102 for manufacturing purposes. A rear or lower cover portion 100 and a front or upper cover portion made as It consists of a pair of sections identified as section 102. Cover 70 is inside Provides maximum protection for the installed parts ((, on the support 16 ((installation) allows access to mechanical parts and electrical terminals placed within the cover portion 100. make it possible. The cover portion 100 includes a circumferential scarf located adjacent the periphery of the support 160. The front or rear end 104 and cover portions 100 and 102 are assembled together. When installed, the cover 70 is attached to two chambers, identified as the rear chamber 108 and the front chamber 110. There is a front wall 106 that acts as a dividing wall to separate the interior of the. The wall 106 has a plug-in connector. The ends of the connectors 48 and 54 in the vestibule 110 receive the connectors 48 and 54, respectively. A pair of openings 112 and 114 are provided to expose the openings. Also Wall 106 is provided with a bore extending through a post 118 that exits rearwardly from wall 106. It also has an opening 116 that is open. The boss 118 and the opening 116 are connected to the chamber 11 0 through the opening 116 and protruding rearwardly to mate with the terminal 40. placed to receive.

Connectors 48 and 54 extend into openings 112 and 114, respectively, where the connectors terminals 48 and 54 are coupled by a pair of spring-biased plug-in connector type conductors, one of which is represented in Figure 2 as 178 and in Figure 6 by the numbers 178 and 180. It is expressed as Pairs of conductors 178 and 180 are connected to a printed circuit as explained below. It is fixed to the circuit in the circuit board 1γ6. Plug-in connectors 48 and 54 and prongs The plug 56 provides a plug-in, interruptible connection and the cover 70 can be removed to remove the pressure switch. When secured to mechanism 12 it completes and interrupts the electrical circuit.

The tefJ portion or upper cover portion 102 has portions 100 and 102 fixed to each other. A single assembly that can be removed or fixed as a single assembly of the cutter support 16 that is, a rear perimeter that joins the MfJ side of the perimeter of wall 106 to provide cover 70; A rim or skirt 120 is provided. To obtain this assembly, front part 1 02 fixes the rear end of the front section 102 to the front end of the section 100, one of which is shown in FIG. A suitably tapped boss is provided to receive the screw 124 shown.

When sections 100 and 102 are assembled, prongs 56 pass through openings 116 and extend through the ends. It comes out to join with child 40.

The prongs 56 are secured to the printed circuit board 122 through the member and within the chamber 110. has an external cylinder placed in the It is preferable to include a plunger that connects with the two terminals 40. Also part of the hippo When 100 and 102 are assembled, the boss 12γ that protrudes forward from the wall 106 is Aligned with boss 128 rearwardly extending from front wall 130 of portion 102, with boss 12γ and Bore 132 exiting from O'128 is aligned with the front helical end of post 81. Hippo one When parts 100 and 102 are thus assembled, one of the posts 81 A bar member 134 having a female threaded end 136 is threaded through the opening in the front wall 130. Exit through bores 13,2 to threaded Ail end 138.

When a suitable nand is screwed onto the front end 138, the cover 70 is secured to the support 16. Ru.

In addition to the on and off pressure switch function, the switch mechanism 12 allows pressure leakage , a pressure switch 10 is provided to protect the motor 76 from water system failure. Contains parts placed within the vestibule 110. Malfunctions that the pump motor may suffer from Some of these include broken pump shafts or fittings, or insufficient well recovery water flow, air identification. As a result of a blocked pump or bonfire suction (with There is no state. Another form of self-proven failure is when the pump gradually sucks in sand. This is an overload condition that occurs as the pump gradually becomes clogged, such as when Sara The electric motor has a discharge pipe that is corroded with scale, a check valve that does not open properly, or or from excessive back pressure caused by poor combination of motor and pump due to difference in ratings. may be subject to overload. Other failures that may occur include overuse of water. , wear of pump parts or leakage of service piping and water storage tanks, check valves. Due to fast cycling of the pump which may be due to leakage or service piping leakage Includes prolongation of driving motions that would otherwise be triggered. The parts inside chamber 110 are as follows. to detect these failures and create an appropriate response that minimizes the damage resulting from the failure. provided to you.

The control device 100 components as shown in FIG. 3 in the front chamber 110 control the IJ- solid state elements identified as 150, current detector 152, and control logic 154; include. Further components include a pair of light emitting diodes (LEDs) 156 and 158; It includes a calibration switch 160 placed in a recess with normally open contacts. diode 156 and 158 and the switch 160 placed in the recess are respectively removed from the front side of the cover 70. It is mounted in the front wall 130 for viewing and access.

From FIGS. 6 and 4, the controller 10 includes a pressure switch mechanism 12 and a power source 162. and a control relay 150 having a normally closed contact 150a and a coil winding 150b; Current detector 152, voltage detector 166, and single-chip microcomputer 1 68, calibration switch 160, LED diodes 156 and 158, and a storage device 170, an associated control circuit 172, and a high/low voltage detector 174. ing.

Power supply 162, current detector 152, voltage detector 166, microcomputer 16 8. The storage device 170 and the control circuit 172 are connected to the printed circuit board 1 by a method well known to those skilled in the art. 22 and 176 are provided by solid parts mounted on top. Print Circuit boards 122 and 176 are held in parallel and isolated relationship by cover 102. There is. Relay 150 is mounted between circuit boards 122 and 176 and is connected to chamber 110. A current detector 152 and a current detector 152 are placed inside.

The pressure switch mechanism 12 is mechanical, and has a movable contact '20 on a diaphragm 22. 710 Switch to circuit closed position or circuit open position according to change in input pressure .

When the pressure drops below the preset pressure setting, the contacts 20 snap into place. moves the stationary contacts 32 to the circuit closed position, causing the motor 76 and the No pump is energized. The energized pump applies pressure to the diaphragm 22. the contact 20 is moved to the open circuit position by a snap action to open the diaphragm. Motor 76 is deenergized when the pressure on ram 22 exceeds a preset value.

As shown in FIG. 6, the AC source is connected to terminal 40 through connectors 72 and 74. and 50, respectively. The terminal 50 is connected by a plug-in connector 178. It is connected to the internal conductor 54 and the components in the vestibule 110. Terminal 40 has prong 56 and a plug-in connector 180 to connect to components in the vestibule 110.

The connector 54 has a closed contact 150a and a pick (not shown) of the current detector 152. Connect to the bayonet connector 48 through a suitable conductor surrounded by the up coil. be done. Connector 54 also provides input to control logic 154. The probe 56 is It is connected to supply lead γ2 to provide an input to control logic 154. In Figure 4, Pressure switch mechanism 12 does not represent conductors 72 and 74 of FIG. 3 but has an input 162. Illustrated as such.

The mechanism 12 may also have an output 163 representing conductors γ8 and 80 of FIG. Illustrated. The fluid pressure applied to the fitting 24 in FIG. 1 is controlled by a pressure switch mechanism. 12 is represented by arrow 182 representing the pressure applied to 12. As shown in Figure 4 As shown, power supply 162, power relay 150, current detector 152, voltage detector 166 , high/low voltage detector 1γ4, microcomputer 168, persistent storage device 1γ0 and control circuit 172 are all housed within the front chamber 110. calibration switch 160 and visual indicators 156 and 158 are positioned by front wall 130 .

The pressure switch mechanism 12 is completely mechanical, and the electric motor γ6 is activated depending on the input pressure 182. Two sets of movable contacts 2o are switched to energize or de-energize. pressure 18 2 drops below the low voltage setting, the contact 20 couples with the stationary contact 32 to The motive 76 is energized. Pressure exceeds high pressure setting and contact 2o snaps UD increases until it opens and de-energizes the electric motor 76. included in the front chamber 110 Power supply 162 provides energizing current and energizing to other aforementioned components contained within vestibule 110. Supply voltage. A power relay 150 is connected in series between connectors 54 and 48. output from the normally closed contact 150a and the microcomputer 168. The actuating coil 150b is connected in a similar manner. Microcomputer 1 68 monitors the operation of tim76 and thereby the operation of the pump in the /stem. look at When the correct output signal is received from the microcomputer 168, the relay - 150 opens contact 150a, thereby causing the contact of switch mechanism 12 to open under low pressure. Even when closed by signal input 182, operation of the pump is prohibited. motor fluid circuit Contact 150a is closed during normal operation when the conditions are normal.

Current detector 152 includes a current transformer (not shown), which is sine of the motor current. The logical record input to the microphone controller 168 via the wave lead 184 Convert to bell square wave. The edge of the output pulse from the current detector 152 Corresponds to the zero crossing of the flow.

The voltage detector 166 has an output that is supplied as an input to the microcomputer 2 user 168. It is equipped with 186. The microcomputer 168 receives input from the power supply 162. believe The voltage detector 166 detects the voltage sine wave of the AC power source from the microcomputer 1. 68 into a logic level square wave. The edge of the square wave output 1ti2 is Corresponds to the zero crossing of the voltage across motor γ6. The microcomputer 168 , the zero crossing of the voltage signal appearing on lead 186 and the current signal appearing on lead 184. The signal is arranged to count the time interval between the zero crossings of the signal, and the electric current is Motivation 7G electric current power! Set.

The high/low voltage detector 1γ4 detects the line voltage appearing on the line 162 by the microcomputer. to two logic level outputs that are provided as inputs 188 of data processor 168 .

The microcomputer 168 sets the voltage appearing on the line 162 to preset high and low limits. Ignore input 188 as long as it is within the range. If the output of voltage detector 174 When present due to a voltage higher or lower than the preset limit, the detector 174 A signal is provided to the power relay 150 through the microcomputer 168, thereby The relay then opens its contact 150a, thus deenergizing the first motor γ6.

The microcomputer 168 is the central control device of the control device 10. microphone - the computer 168 is connected to the monitor pump operation. As explained later, the microcomputer 168 is an electric motor. An output is provided to relay 150 in response to a signal representing the state of .

The control device 10 includes a permanent storage device γ0. Storage device IO is EFROlvi (Electrically erasable programmable read-only storage device). This storage device is Retains any information stored in it if power is removed or fails. It is a type of storage device. Important parts of the data to be stored in the storage device 170 will be As explained in , it is a calibration value. Other data values (at the end, the control device 10 (0) is programmed into the storage device during manufacturing. Control circuit 172D7. micro Required components to support computer 168, i.e. fittings not shown. Contains a winning rock crystal.

Switch 160 is mounted on the front wall of cover 70 and is thus easily accessible for calibration purposes. Available. Electrical and piping connections of the pump device combined with the control device 10 Once connected, the motor operates under normal operating conditions and the contacts of calibration switch 160 is closed and the input is supplied to the microcomputer, which is controlled by the software. Skip to the routine and read the calibration into persistent storage 170 for future use. and memorize the value. The arrangement of the switches 160 inside the cover 70 is such that the switches 160 are in the recess and connects to the front wall 106 to hide the switch 160 after the calibration procedure is completed. The arrangement is such that a stiffening force is applied. If desired, print a stamp with the date of calibration. Can be carved on top of the tin force.

The storage device that stores calibration values does not require electrical power to retain the data, and It is a non-permanent storage device with data available each time a force is applied to the controller 10.

Thus, even if power is removed from controller 10, the calibration data in storage remains This ensures that no recalibration of the switch is required. The power factor for normal operation of an electric motor is the load and varies not only with voltage, but also with motor design and rated horsepower. also changes. A calibration function is included in the controller 10 to compensate for these changes. ing. According to FIG. 5, point A on curve 190 indicates that switch 160 is actuated. The power factor or calibration value for normal operation is then entered into the memory of the controller 10. .

The value at point A on curve 190 is compared with the power factor value during actual operation, which is determined by the point. used for. The position of the dot on curve 190 is the load on the motor and pump equipment. , if the voltage changes due to reasons such as changes in pressure, it is constantly checked to ensure that it is connected to point A. be compared. If the score is a dog than the value “M” or a positive value that is less than the value “N” When leaving starting point A, power relay 150 is energized and the motor is de-energized to The new signal is indicated by the illumination state of diodes 156 and 158. M Since the values of and N are fixed by the software of the microcomputer 168, , 'Normal changes in the operating characteristics of the electric motor are simulated when the control device 10 is properly calibrated. Does not cause iris drip.

The portion containing the visual indicators represented by diodes 156 and 158 diodes 156 and 158 are placed in front of the diodes 156 and 158 so that the They are arranged to be placed within the wall 130. Light emitting diodes 156 and 158 is a contrasting color such as red for diode 156 and yellow for diode 158. Desired to be selected to have (-) "F", as shown in the garment below. "S" and JOFIi'j indicate the illumination state of diodes 156 and 158; coded to indicate malfunctioning conditions of the motor and pump. . When the diode operates in the manner shown, it represents the type of failure that may occur in the /stem. Show.

In this example, the code of the diode is as follows, and "F" is the flashing diode. OFF, J is the diode that is constantly energized, and OFF is the diode that is constantly energized. diode.

No load F’F High speed circulation S S Low voltage FS High voltage S filter Overload F OFF Operation extension OFF S Normal on/off OFF OFF When low water conditions or no load of the motor or pump occurs, the power factor of the motor is 0.4 5 or less, and the current of electric ybb decreases. When the motor current decreases, the motor Restart the motor several times until the need to de-energize the motor decreases and the motor is completely de-energized. It can be activated. When a no-load condition occurs, the pump controller will is detected and the electric motor is deenergized. After a short delay, the microcomputer powers up, Attempt to restart the motivation. If the no-load state continues, the microcomputer will Gradually increase the delay time for subsequent restarts, and delay restarts by a certain number of pre-programs. Later the microcomputer aborts its attempt to restart the motor. power factor change By detecting this, the electric motor is protected from damage.

If the shaft is damaged or the pump inlet is clogged, the electric motor will It will not be damaged if you ask for it.

Sometimes it's the result. Electric motor overload occurs under fixed rotor conditions and Pump overload occurs when increased backpressure reduces pump flow. these The two overload conditions are distinguished when the motor current and voltage parameters are The pump shows different changes under two conditions and therefore under two different overload conditions. and because different protection features are required to protect the electric motor. electric motor Overloading can occur when the pump becomes clogged with sand or the motor stalls.

In this case, the timing of the motor going to a fixed rotor state is determined by the pump controller. is an important element in the protection of

When the pump slowly becomes clogged with sand, the controller detects an increase in power factor 710 and It seems that there is time to de-energize the electric motor. In contrast, the pump and electric motor Once determined, the pump and motor require complete removal of the pump from the well. shall not provide any additional protection to the protection provided by conventional circadian play forces in the circuit. 7JD protection seems unnecessary. Additionally, if the control device is a fixed rotor or pump If a clogged condition is detected, restarting the pump and motor will worsen the situation. . For this reason, time delays and restarts occur under stationary rotor or pump clogged conditions. No movement is attempted.

, if the pump is overloaded due to excessive backpressure, the pump's flow output will be reduced. As a result, both the power factor and current of the motor decrease. When this type of fault is detected , there is sufficient time to de-energize the motor before the pump and motor are damaged. . If the pump continues to be overloaded, a no-load signal is given, which is This is because the control device cannot distinguish between a no-load condition and an overvoltage condition.

When the pump device receives an extended operation condition, the microcomputer de-energizes the pump. Adjust the time interval to begin and if the pressure is not restored within the predetermined time period, a visual signal will appear. number is given.

Rapid circulation can result from a clogged tank, leaking check valve, or leaking piping. system The controller 10 detects the low pressure signal and energizes the motor to restore the correct pressure. let If a low pressure signal is detected prematurely after the motor has been de-energized, the signal will Do not energize the motor until the position is reset. This function is This prevents the motor from overheating due to repeated large starting currents. The control device is an electric motor winding Overvoltage conditions that cause excessive stress on the wires and faults that cause overheating of the motor windings. It also detects the foot voltage status. According to good electric motor design, the electric motor has its normal voltage It is prevented from receiving voltages 10% greater or 10% less than the rating. present invention In a control device, when an incorrect voltage level is detected, the control device energizes the motor and prolong the life of motors controlled in this way.

The operation of the control device 10 as shown in FIG. 6 is considered self-evident and relevant to the present invention. As may be readily apparent to those skilled in the art, as shown in FIG. Control logic 154 is connected to conductors 72 and 74, connector 178 and conductor 180. It is constantly energized from the power source. Furthermore, as shown in FIG. Provides input to pressure detector 166 and microcomputer 168. current detection 152 and high/low voltage detector 174 provide input to microcomputer 168. supply

Initially, when motor 76 is energized as a result of fluid pressure decrease signal 182, high/low The output of voltage detector 1γ4 is interrogated by microcomputer 168.

If the power supply voltage is too low, control is transferred from block 200 to control 202, where An energizing signal is provided to relay coil 150b to de-energize motor 76 and Flash the red LED 156 to which the toggle signal is supplied, and switch to the yellow LED 158. A steady glow is emitted across the conductors 12 and 74 indicating a low voltage condition. If low power If there is no pressure condition, control is transferred to block 204 and control 206, where Determine if the supply voltage is too high. If the supply voltage is too high, control 206 energize the relay coil 150b and supply the output to erase the motor γ6; In addition, the red LED 156 is kept in a steady state, and the yellow LED 153 is kept in a blinking state. to indicate a high voltage condition.

If a high voltage condition does not exist, control transfers to block 208 where motor 1 6 is checked to see if it is operating as indicated by adequate motor current. Ru. If the motor is not running, control returns to block 200 via input A. and restart the motor starting current. Block 208 energizes electric motor 16. When it is determined that the control signal is to be opened after a predetermined time delay, the control signal is is started, thereby causing block 212 to detect current detector 164 and voltage detector 166. to determine the power factor of the motor current.

After control 212 begins reading the power factor, control passes to block 214. , where it is determined whether the motor has turned off. motor turns off If block 214 determines that the Here, it is determined whether the interval between on/off operation cycles of the motor is smaller than a predetermined value. is determined. If the operating cycle of the motor is less than a predetermined value, the control is restricted. m21B, where relay coil 150b is energized and motor 76 is turned off. The red IJD 156 is kept in a steady state, and the yellow LED 15B is in a steady state, indicating high-speed circulation of the motor. Block 216 Once it is determined that the value is not less than the preprogrammed value, the control is returned to point A.

A readout of the motor power factor is initiated by control 212 and the motor is turned off. After block 214 determines that the It is then determined whether the power factor of the motor current has been read. Power factor readout If the process is not completed, control (2) is returned to block 214 where control is blocked. It is determined again whether the motor is turned off until it is transferred back to 220. be done. Once the motor power factor reading is complete, block 220 blocks control. Move to 222. Block 222 indicates that the calibration request is made by closing the contacts of switch 160. Determine whether it has started. In that case, control 224 controls the calibration parameters. Microcomputer 168 is entered and control is returned to block 212 at point B.

Once the calibration values have been filled in, control passes to block 226. Block 226 is low Determine if no-load conditions exist, such as those due to water conditions. low water The condition is indicated by a power factor drop below 0.45 and a decrease in motor current.

When a low water condition exists, control passes to block 228 where the detected It is determined whether the condition is an initial low water condition. By block 228 If the detected low water condition is the first low water condition, the control returns to control 23. 0, where, after a short delay, relay 150 is energized to turn off motor 76. Also, keep the red LED 156 in a blinking state and the yellow LED I'58. to steady state to indicate the presence of low water or no-load conditions. After a short delay, control Control is transferred from control 230 to block 232 where relay 150 is deenergized. Both restart the electric motor 16. Block 228 is a continuous low water or no load condition. In response to the indication, input is provided to block 234 for each occurrence. Block 2 After 34 determines the occurrence of four consecutive no-load conditions, it passes to control 236. , now energizes relay 150b and connects IJDs 156 and 158 as described above. to indicate the presence of low water or no load conditions. detected by block 234. If the condition entered is not the fourth low water condition, control is transferred to control N238 where the second and as a third low water condition is detected by block 226, block 2 The delay of the signal provided to 32 is gradually increased.

Thus, after four low water conditions are detected by block 226, relay 150 is activated. energized to interrupt the motor circuit and also diode LEDs 156 and 1 58 is energized in the manner previously described.

If the device does not have a low water or no negative condition, control passes from block 226 to block 2. Moved to 40. If a motor and pump overload condition exists, the motor The power factor of the flow increases above point C in FIG. 5, and block 240 transfers control to control 242. vinegar. An overload condition causes control 242 to energize relay 150, which is de-energized, the red LED 156 outputs a blinking output, and the yellow LED 158 Make it male.

If no overload condition exists, block 240 transfers control to block 244 . Block 244 is responsive to the low voltage, voltage signal from detector 1γ4, and if the low voltage signal exists, control is transferred from point A to block 200 where relay 150 is attached. At the same time as stopping the electric motor, the red LED 156 outputs a flashing output. , Yellow LED 158 IC to output steady or continuous output.

The voltage detected by block 244 is greater than a preprogrammed value. If not, control is transferred to block 246 where the signals from detector 174 are quality-coded. Regarding the high voltage that reaches point A and the high voltage block 204 via the low voltage block 200, Provides an output that displays pressure. Block 204 controls the control in response to the detected high voltage. Control is transferred to control 206, which energizes relay 150 to stop motor 76. , and the red LED 1'56 is continuously illuminated and the yellow LED 158 flashes. Toggle the LED to hold it.

A signal from voltage detector 174 to block 246 indicates that the motor is within predetermined voltage limits. , control is transferred to block 248. block 24 8 adjusts the pump operation time, and if the pump operation time is exceeded, the control is Transferred to control 250.

If the time period of the pump cycle is exceeded, control is transferred to control 250, which The red LED 156 is not illuminated and the yellow LED 158 outputs a steady output. Control 250 then toggles the LED.

If no extension of operation is detected by block 248vc, control passes to block 24 8 to point B and question the voltage and current operation of the motor as described. Another cycle occurs.

Although certain preferred embodiments of the invention have been specifically disclosed, it will be understood that the invention can be used in many ways. Variations are not limited to, as would be readily apparent to those skilled in the art, and The invention is intended to be given its broadest possible interpretation within the scope of the following claims.

Engraving (no change in internal provision) Procedural amendment (formality) March 73, 1973 Commissioner of the Patent Office 3. Person who makes corrections Relationship to the incident: Patent applicant 5. Date of amendment order July 8th, 1965 6. Number of inventions increased by amendment Translation of statement of claim and scope of claims international search report

Claims (1)

[Claims] Claim 1. a support, a cover with a rear end resting on the support, a side wall extending forward from the rear end, a front wall extending between the front ends of the side walls, a support, a cavity extending between the side wall and the front wall, and a support within the cavity. terminals mounted on and connected to an alternating current power supply and A pressure-responsive snap-acting switch mechanism including terminals connected to the machine and placed within the cavity. a plurality of components including a programmable microcomputer that represents the desired operating state of the motor when the motor is energized and a switch is actuated; A hand mounted on the front wall that is accessible to the operator from outside the circuit cover and contacts with the microcomputer for entering data points into the microcomputer. A pressure switch characterized in that it includes a switch that can be operated manually. Claim 2. a support; a pressure-responsive snap-acting switch mechanism mounted on the support and including terminals connected to an alternating current power source and connected to an alternating current motor; a rear end resting on the support; and from the rear end to the front end. a side wall extending forward, a front wall extending between the front ends of the side walls, a support, a cavity extending between the side wall and the front wall and housing a pressure-responsive snump-acting switch mechanism, a rear chamber and a front chamber housing the switch mechanism; a wall extending between the side walls dividing the cavity into two parts, a plurality of parts including a programmable microcomputer placed in the vestibule and representing the desired operating state of the motor when the motor is energized and a switch actuated; circle A hand mounted on the front wall that is accessible to the operator from outside the circuit cover and contacts with the microcomputer for entering data points into the microcomputer. A pressure switch characterized in that it includes a switch that can be operated manually. Claim 6. A wall spanning between the side walls divides the cavity into an anterior chamber and a posterior chamber, and characterized in that the number-operating switch mechanism is placed in the rear chamber and the parts are placed in the front chamber. A pressure switch according to claim 1. Claim 4. At least one lighting device shall be placed on the front wall and visible from the outside. A pressure switch according to claim 6, characterized in that the pressure switch is connected in a circuit with a component having multiple illumination states coded to indicate the operating state of the motor. Itch. Claim 5. Pressure switch according to claim 1, characterized in that at least one lighting device is visible from the outside of the front wall to indicate the operating status of the electric motor. Claim 6. 4. Pressure switch according to claim 3, characterized in that at least one lighting device is visible from the outside of the front wall to indicate the operating status of the electric motor. Claim 7. Pressure switch according to claim 2, characterized in that at least one lighting device is visible from the outside of the front wall to indicate the operating status of the electric motor. Claim 8. Pressure switch according to claim 5, characterized in that two lighting devices with contrasting colors are placed on the front wall. Claim 9. Pressure switch according to claim 2, characterized in that the terminals and the parts are electrically connected by a separable connection. Claim 10. Pressure switch according to claim 1, characterized in that the terminals and the parts are electrically connected by a separable connection. Claim 11. Pressure switch according to claim 6, characterized in that the terminals and the parts are electrically connected by a separable connection. Claim 12. 9. Pressure switch according to claim 8, characterized in that the terminals and the parts are electrically connected by a separable connection. Claim 16. A connection that opens and closes a motor circuit in response to pressure changes in a fluid device. a mechanically actuated pressure-responsive switching device with a point; a device that detects and supplies a signal that manipulates the current in the circuit; a device that detects and supplies a signal representative of the voltage across the motor; and a device that detects and supplies a signal representing the voltage across the motor; a device for providing, in response to a signal, a signal representative of the power factor of the current in the circuit; and, in response to the signal, interrupting the circuit when at least one signal changes by an amount exceeding a preprogrammed value; 15. A motor control switch 1, comprising: a device for controlling the motor; 14. Motor control switch according to claim 13, characterized in that the contacts are actuated by a snap action. Claim 15. 17. A motor control switch according to claim 16, characterized in that the device for interrupting the circuit comprises an electromagnetically actuated device. Claim 16. A mechanically actuated pressure-responsive device with switching contacts that opens and closes a circuit between an AC power source and an AC motor in response to pressure changes in a fluid device; A device detects and supplies a signal that manipulates the voltage across the motor, a device that detects and supplies a signal representing the current in the circuit, and a device that responds to the current and voltage signals to generate a signal representing the power factor of the motor current. a device for making and measuring the duration of the interval when the motor is energized and the duration between the intervals when the motor is energized and providing an output that varies the duration of the interval; The pre-selected outputs and signals are pre-programmed in response to the outputs and signals. and a device for interrupting the circuit when the value changes by an amount greater than the programmed value. Claim 17. A mechanically actuated pressure-responsive switching device with contacts that opens and closes a circuit between an AC power source and an AC motor in response to pressure changes in a fluid device; A device for detecting and supplying a voltage signal representing an alternating voltage across a circuit; a device for detecting and supplying a current signal representing an alternating current in a circuit; A device for supplying a power factor signal that determines the duration of the interval between instants in which the polarity of the current is opposite, and for measuring and supplying an execution signal that represents the duration of the interval when the motor is energized. a time adjustment device for measuring and providing an off signal representative of the duration of the interval between successive run signal occurrences; A motor control switch comprising: a device including a microcomputer that interrupts a circuit in response to a signal; Claim 18. If the device interrupting the circuit is a relay with normally closed contacts in the circuit, 18. The motor control switch according to claim 17, further comprising a coil winding whose energization is controlled by a microcomputer. Claim 19. A motor control switch according to claim 18, characterized in that the device for opening and closing the circuit comprises a switch having snap-acting contacts. Claim 20. The device for opening and closing the circuit comprises a switch having snap-acting contacts. A motor side leg switch according to claim 13, characterized in that it includes a switch.Claim 21. An electric motor according to claim 17, characterized in that the electric motor drives an immersed pump. Control switch. Claim 22. The snap-acting contacts, the voltage sensing device, the current sensing device, the power factor supply device, the run signal supply device, the off signal supply device, and the microcomputer are surrounded by a common cover, and the cover 〇A pair of light emitting devices placed on the front wall A motor control switch according to claim 2O, characterized in that the chair is coded as 5 to indicate a detected malfunction of the motor and pump 0. Claim 26. A motor control system according to claim 22, characterized in that the pair of light emitting diodes are attached to the cover and have contrasting colors. Itch. Claim 24. A motor control switch according to claim 2, wherein the code for the diode is provided by a microcomputer so that the diode is selectively switched between an off state, a steady on state, and a blinking state. Claim 25. 20. The electric motor limit switch according to claim 19, wherein the electric motor drives an immersed pump. Claim 26. The snap-acting contacts, the voltage sensing device, the current sensing device, the power factor feeding device, the run signal feeding device, the off signal feeding device and the microcomputer are surrounded by a common cover, and a pair of light emitting devices placed on the front wall of the cover. is coded to indicate detected malfunctions of the motor and pump. A motor control switch according to claim 25, characterized in that: Claim 27. A motor control system according to claim 26, characterized in that the pair of light emitting diodes are attached to the cover and have contrasting colors. Itch. Claim 28. The diode code is programmed into the microcomputer so that the diode can be selectively switched between an off state, a steady on state, and a flashing state. Accordingly, the motor control system according to claim 27 is provided Itch. Claim 29. a support and a first halves removably mounted on the support; a housing portion, a second housing portion mounted on the first housing portion, and a second housing portion mounted on the support and enclosed within a cavity supplied by the first housing portion. a pressure-responsive snap-action switch mechanism enclosed and provided by the second housing portion; A solid control component enclosed within a cavity is supplied and a switch exits through an opening between the cavities. and a device for providing a separable electrical connection between the chain mechanism and the solid component. Electric motor control device with characteristics. Claim No. 0. Separable electrical connections may be provided by plug-in elements. An electric motor control device according to claim 29, characterized in that: Claim 31. The pressure-responsive snap-action switch mechanism is mounted on a support. a stationary contact assembly including a pressure-responsive diaphragm mounted on a support, a plurality of stationary contacts mounted on a support, and contacts movable by snapping action in response to movement of the diaphragm into and out of engagement with the stationary contacts. 30. The motor control device according to claim 29, further comprising: a movable contact assembly. Claim 62. 29. The components enclosed within the second housing portion include relays, current-responsive devices, and voltage-responsive devices. Electric motor control device. Claims No. 1 and 2. 62. The components enclosed within the second housing portion include relays, current-responsive devices, and voltage-responsive devices. Yang subarea control il+] device. Claim 34. The pressure-centered snap-action switch mechanism is mounted on a support. a stationary contact assembly including a pressure-responsive diaphragm mounted on a support, a plurality of stationary contacts mounted on a support, and a movable contact assembly including contacts movable by a snap action in response to movement of the diaphragm into and away from the stationary contacts. and a contact assembly. An electric motor control device according to claim 30, characterized in that: Claim No. 65. Components enclosed within the second housing portion include relays, electrical 61. A motor control device according to claim 60, comprising a flow responsive device and a voltage responsive device. Claim 66. The component enclosed within the second housing portion is a relay. electric 65. A motor control device according to claim 64, characterized in that it includes a flow responsive device and a voltage responsive device. Claim 67. a support, a mechanical switch mechanism mounted on the support, the switch mechanism including a wire and connection terminal connecting the switch mechanism to a motor to be energized by a power source and a power source; and a force/power support. Sui when placed in A force that surrounds the switch mechanism and provides access to the terminal being removed. a cup removably housed on a supporting support, a component including a solid state control component enclosed within the cup, and providing a separable electrical connection between the terminal and the solid component. A motor control switch characterized in that it comprises: Claim 68. Separable electrical connections may be provided by plug-in elements. A motor control switch according to claim 67, characterized in that: Claim 39. A pressure-responsive snap-action switch mechanism includes a pressure-responsive diaphragm that is swung onto a support, a stationary contact assembly that includes a plurality of stationary contacts, and that snap-acts in response to movement of the diaphragm into and out of engagement with the stationary contacts. Yo 68. A motor control switch according to claim 67, further comprising a movable contact assembly including a movable contact. Claim No. 40. An electrical device according to claim 37, characterized in that one part enclosed within the housing includes a relay, a current responsive device and an electrically responsive device. Motivation control switch. Claim No. 41. The cover has an internal dividing wall with control components placed within the cover on the side remote from the switch mechanism, and a device providing separable electrical connections. The electric motor according to claim 67, characterized in that the position exits through the dividing wall. Machine control switch. Claim 42. A separable electrical connection is a terminal-attached electrical connection. is provided by the cooperation of the connector and the printed circuit board enclosed within the cover. 42. A motor control switch according to claim 41, characterized in that it is supplied with electricity and exits through an opening in the dividing wall. Claim 43. a support with a perimeter and a lever pivotally mounted on the support and a port with the end secured to the support and threaded through the opening in the lever and over the threaded end. a spring seat placed over the threaded end; a compression spring surrounding the post and placed between the spring seat and the lever; and a support adapted to urge the lever in a direction that compresses the spring. pressure responsive machine placed structure, an insulating block placed by a support, and each contact structure including stationary contacts and terminal members. a plurality of stationary contact structures placed by a block together with the structure; a plurality of movable contacts which are moved by means of levers that engage and disengage the stationary contacts; and a cover for the switch, said cover having an internal area and Adjacent to the perimeter of the support It has a peripheral skirt placed in contact with it and a dividing wall separating the front chamber from the rear chamber in the inner area of the cover, the rear chamber containing a mechanically operated switch part and the i'11 chamber containing a plurality of electronic components. a plurality of separable connectors arranged to pass through openings in the dividing wall and connect components of the front chamber with selected stationary contact structures of the rear chamber; 1. A motor control switch having a mechanically actuated switch portion comprising: a threaded connection having a threaded end of a post through which the cover is secured to a support; Claim 44. A separable electrical connection can be made on the support to make a static connection. A separable block of insulating material is identified on the block of insulating material to provide support for one of the wire connection terminals and a separation combined with said one wire connection terminal. Possible connector insertion part and An electric motor control device according to claim 39, characterized in that: Claim 45. 45. A motor control device according to claim 44, characterized in that it includes a plug-in portion of a separable connector with which a stationary contact is associated with said one terminal. Engraving (no changes to the content)