KR20230087854A - Apparatus for injecting urea solution containing filter and System for supplying urea solution using the same - Google Patents

Abstract

The present invention relates to a urea water injection device including a filter and a urea water supply system using the same, and more particularly, to a urea water injection device including a filter to remove impurities that may occur in the storage process A urea water injection device that can be injected into a vehicle and analyzes sensing information of urea water stored in a storage tank to maintain the quality of urea water and enable economical supply, and a urea water supply system using the same.

Description

Urea water injection device including a filter and urea water supply system using the same {Apparatus for injecting urea solution containing filter and System for supplying urea solution using the same}

The present invention relates to a urea water injection device including a filter and a urea water supply system using the same, and more particularly, to a urea water injection device including a filter to remove impurities that may occur in the storage process A urea water injection device that can be injected into a vehicle and analyzes sensing information of urea water stored in a storage tank to maintain the quality of urea water and enable economical supply, and a urea water supply system using the same.

Urea water is a catalyst used in an exhaust gas reduction device of a vehicle that uses diesel as fuel. It reacts with the exhaust gas discharged from the vehicle to reduce nitrogen oxides to nitrogen and water that are harmless to the environment. When there are impurities such as triuret, coal tar, and biuret in the urea solution, the DPF and SCR of the exhaust gas reduction device are clogged in the process of treating nitrogen oxide using the urea solution. Accordingly, as described in the following patent documents, a urea solution manufacturing technology is being developed to prevent impurities such as triuret, coal tar, and biuret from being generated during the manufacturing process.

<Patent Document>

Patent No. 10-1879350 (registered on July 11, 2018) "Method for manufacturing urea water"

However, the prior art focuses on manufacturing urea with less impurities, and even if the manufactured urea does not contain impurities, impurities are added to the urea during the process of storing the produced urea and injecting it into the vehicle. Mixed problems cannot be solved.

Therefore, there is an increasing need for a urea water injection device capable of injecting into a vehicle after removing impurities that may occur in the storage process of urea water by using a filter or the like.

The present invention is to solve the above-mentioned problems of the prior art,

The present invention uses a urea water injection device including a filter to inject urea water from which impurities that may occur during the storage process of urea water have been removed into a vehicle, thereby preventing damage to the exhaust gas reduction device. Its purpose is to provide an apparatus and a urea water supply system using the same.

In addition, an object of the present invention is to provide a urea water injection device and a urea water supply system using the same to maintain the quality of the urea water and enable economical supply by analyzing the sensing information of the urea water stored in the storage tank.

also. An object of the present invention is to provide a urea water injection device and a urea water supply system using the same, which can prevent the device from malfunctioning by confirming the contamination state of the filter and cleaning it.

The present invention is implemented by an embodiment having the following configuration in order to achieve the above object.

According to one embodiment of the present invention, the urea water injection device according to the present invention includes a storage tank for storing urea water and a filter device for filtering the urea water stored in the storage tank, wherein the filter device is configured to flow urea water. It is characterized in that it includes a housing including an inlet, an outlet through which the filtered urea water is discharged, and a filtering net positioned inside the housing to filter the urea water introduced into the housing.

According to another embodiment of the present invention, the urea water injection device according to the present invention includes a pump for supplying the urea water stored in the storage tank to the filter device, and an element disposed at the rear of the filter device and discharged from the filter device. It includes a sensor for measuring the flow rate of the water, and a controller for controlling the operation of the pump and the sensor, and inside the storage tank, a water level sensor for measuring the level of the stored urea water, and a plurality of water level sensors at regular intervals up and down. It is characterized in that the dog is installed to include a temperature sensor for measuring the temperature of the urea water, and a motor for stirring the urea water.

According to another embodiment of the present invention, in the urea water injection device according to the present invention, the controller checks the information transmitted by a plurality of temperature sensors, and the difference between the temperature values transmitted by each temperature sensor is greater than the preset reference value. In this case, the motor is operated so that the urea water is stirred, and then, when the difference between the temperature values measured by each temperature sensor is smaller than the reference value, the state holding unit for stopping the operation of the motor and the information transmitted by the water level sensor When the level of the urea water stored in the storage tank is lower than a predetermined reference value, a supply request unit generating a signal requesting supply of the urea water and analyzing information output from a sensor for measuring the flow rate to analyze the filter device It is characterized in that it includes a filter determination unit for determining whether the failure and contamination of the.

According to another embodiment of the present invention, in the urea water injection device according to the present invention, the filter determination unit has a flow rate value output from a sensor for measuring the flow rate of the urea water while supplying the urea water to a predetermined first failure limit. If the value is greater than a certain number of times over a certain period of time, the flow rate value output from the first failure judgment unit for determining that a failure has occurred in the filter device and a sensor for measuring the flow rate of urea water while supplying urea water is If the number of cases smaller than the predetermined second failure limit is more than a certain number of times during a certain period, the second failure determination unit that determines that the pump has failed, and the output from the sensor that measures the flow rate of urea water while supplying urea water and a contamination determination unit that determines that the filter device is contaminated when the flow velocity value is within a predetermined contamination limit range at least a certain number of times during a certain period of time, wherein the first failure limit value has a value greater than the second failure limit value , The contamination limit range is characterized in that located between the first failure limit value and the second failure limit value.

According to another embodiment of the present invention, the urea water supply system according to the present invention exchanges information with a plurality of injection devices installed in different regions and supplies urea water through the injection devices. It includes a management server for controlling, and the injection device uses the urea solution injection device of claim 4, and the management server sends information about the failure of the pump or filter device to the operator terminal when information is output from the injection device. and a repair/cleaning request unit outputting information requesting cleaning of the filter device to the cleaner terminal when the information that the filter device is contaminated is output from the injection device, and the injection device controls the supply of urea water. A supply requesting unit that outputs a signal requesting supply of urea water to the supplier terminal when the requested information is output, and completes a urea water supply contract when information to supply urea water is output from the supplier terminal; After the urea water supply contract is completed by the supply request unit, if the contents of the supply contract are checked and it is confirmed that the urea water is supplied after a certain period of time, the Request information on the level of the urea water stored in the storage tank from other injection devices, and if the information on the level of the urea water is output from the other injection devices, check it to select other injection devices whose water level is higher than the standard By checking the distance between the selected other injection devices and the injection device requesting the supply of urea solution, a portion of urea water is collected from the injection device closest to the injection device requesting the supply of urea solution, and the injection device requesting the supply of urea solution is injected. and a supply adjustment unit outputting a signal to supply the device to the operator terminal.

The present invention can obtain the following effects by the above embodiment.

The present invention has an effect of preventing damage to the exhaust gas reduction device by injecting urea water from which impurities that may occur during the storage process of urea water have been removed into a vehicle by using a urea water injection device including a filter. .

In addition, the present invention has the effect of maintaining the quality of the urea water and enabling economical supply by analyzing the sensing information of the urea water stored in the storage tank.

also. The present invention has an effect of preventing the device from malfunctioning by checking the contamination state of the filter so that cleaning is performed.

1 is a block diagram showing the detailed configuration of a urea water supply system according to an embodiment of the present invention.
Figure 2 is a schematic configuration diagram of a urea water injection device used in the urea water supply system according to an embodiment of the present invention.
3 is a cross-sectional view showing a detailed configuration of the filter device of FIG. 2;
Figure 4 is a block diagram showing the detailed configuration of the controller of Figure 2;
5 is a block diagram showing a detailed configuration of a filter judgment unit of FIG. 4;
Figure 6 is a block diagram showing the detailed configuration of the management server of Figure 1;

Hereinafter, preferred embodiments of a urea water injection device including a filter according to the present invention and a urea water supply system using the same will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Throughout the specification, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated, and also described in the specification. Terms such as "... unit, ... module" mean a unit that processes at least one function or operation, and may be implemented as hardware, software, or a combination of hardware and software.

Referring to FIGS. 1 to 5, the urea water injection device including a filter according to an embodiment of the present invention, the urea water injection device 1 includes a storage tank 11 in which urea water is stored, and the storage tank A pump 12 for supplying the urea water stored in 11, located between the pump 12 and the filter device 14, and the urea water supplied to the filter device 14 by the operation of the pump 12 Between the first sensor 13 for measuring the flow rate, the filter device 14 for filtering the urea water supplied by the operation of the pump 12, and the filter device 14 and the nozzle device 16 A second sensor 15 located in the filter device 14 to measure the flow rate of the urea water discharged from the filter device 14, and a nozzle device 16 for supplying the urea water that has passed through the filter device 14 to the vehicle; In order to inject urea water into the vehicle using the urea water injection device, the user of the vehicle manipulates and displays the urea water supply state to the vehicle, and various devices located in the storage tank 11, A controller 18 that controls the supply of urea water to the vehicle by exchanging information with the pump 12, the first sensor 13, the second sensor 15, the nozzle device 16, the operation display unit 17, etc. include

The storage tank 11 has a configuration in which urea water is stored inside, and although not shown, a plurality of water level sensors for measuring the level of the stored urea water are installed at regular intervals above and below to measure the temperature of the urea water. A temperature sensor, a motor for stirring the urea water, etc. are installed.

The pump 12 is configured to move the urea water stored in the storage tank 11, and the first sensor 13 is located between the pump 12 and the filter device 14 to It is a configuration for measuring the flow rate of the urea water supplied to the filter device 14 by operation on a periodic basis.

The filter device 14 filters the urea water supplied by the operation of the pump 12, and includes an inlet 141a through which the urea water flows and an outlet 141b through which the filtered urea water is discharged. and a filtering net 142 located inside the housing 141 to filter the urea water introduced into the housing 141. The urea water introduced through the inlet 141a is filtered through the filter net 142, and the urea water from which impurities are removed is discharged through the outlet 141b. When the filter device 14 is continuously used, the filter net 142 is contaminated, and filtration and supply of urea water are not smooth, and a failure of a device such as a motor may occur. 142) to determine the degree of contamination and perform cleaning, which will be described in detail below.

The second sensor 15 is configured to periodically measure the flow rate of urea water discharged from the filter device 14, and the nozzle device 16 supplies the urea water that has passed through the filter device 14 to the vehicle. It is a composition that When the user of the vehicle holds the nozzle device 16, inserts the tip into the urea water injection port and presses a lever (not shown) of the nozzle device 16, urea water is injected into the vehicle. Since a conventional nozzle device is used for the nozzle device 16, a detailed description thereof will be omitted.

The operation display unit 17 is a configuration in which a user of the vehicle operates to inject urea water into the vehicle using the urea water injection device and displays a state of supplying urea water to the vehicle, and generates an operation signal by a user's touch. It may include a button unit (not shown) and a display (not shown) displaying the supply state of urea water to the vehicle.

The controller 18 displays information such as various devices located in the storage tank 11, the pump 12, the first sensor 13, the second sensor 15, the nozzle device 16, the operation display unit 17, etc. It is a configuration that controls the supply of urea water to the vehicle by exchanging, and the transmission and reception unit 181, the urea water supply unit 182, the state maintenance unit 183, the supply request unit 184, the filter determination unit 185, the storage A unit 186, a control unit 187, and the like are included.

The transceiver 181 includes various devices located in the storage tank 11, the pump 12, the first sensor 13, the second sensor 15, the nozzle device 16, the operation display unit 17, and It is connected to the management server 2, etc., and transmits and receives information.

The urea water supply unit 182 controls the supply of urea water to the vehicle, and when the vehicle user manipulates the button unit to inject urea water into the vehicle and makes a payment, the urea water supply unit 182 The urea water injection method is displayed on the display, and accordingly, when the user inserts the end of the nozzle device 16 into the urea water inlet and presses the lever, the urea water supply unit 182 operates the pump to supply the storage tank 11 After the stored urea water passes through the filter device 14, it is supplied to the vehicle through the nozzle device 16.

The state holding unit 183 checks the information transmitted by the plurality of temperature sensors, and when the difference between the temperature values output by each temperature sensor is greater than a preset reference value, operates the motor to stir the urea water, and then When the difference between the temperature values output by each temperature sensor is less than the reference value, the operation of the motor is stopped. When a temperature difference occurs in the urea water stored in the storage tank 11, the quality of the urea water changes. to keep this

The supply request unit 184 checks the information transmitted by the water level sensor and generates a signal requesting the supply of urea water when the level of the urea water stored in the storage tank 11 is lower than a reference value, and the signal is managed. It is controlled to be transmitted to the server (2).

The filter determination unit 185 analyzes the information output to the first sensor 13 and the second sensor 15 to determine whether the filter device 14 is out of order or contaminated, and is a data collection unit. 185a, a first failure determination unit 185b, a second failure determination unit 185c, a contamination determination unit 185d, and the like.

The data collection unit 185a is a component that collects and outputs information about the flow rate output to the first sensor 13 and the second sensor 15 .

The first failure determination unit 185b checks the information output from the data collection unit 185a to determine whether the filter device 14 is out of order, and if it is determined to be out of order, the urea water supply unit 182 stops operating. It is configured to stop and transmit the result to the management server 2, specifically, during the supply of urea water, when the flow rate value output from the second sensor 15 is greater than the preset first failure limit value for a certain period of time It is configured to determine that a failure has occurred in the filter device 14 if it is more than a certain number of times during the period. When a failure such as separation or tearing of the filter net 142 of the filter device 14 occurs, the flow rate discharged from the filter device 14 significantly increases, so the first failure threshold is set in consideration of this. do.

The second failure determination unit 185c checks the information output from the data collection unit 185a to determine whether the pump 12 is out of order, and stops the operation of the urea water supply unit 182 when it is determined that the pump 12 is out of order. and the result is transmitted to the management server 2, specifically, during the supply of urea water, when the flow rate value output from the second sensor 12 is smaller than the preset second failure limit value for a certain period of time It is a configuration that determines that a failure has occurred in the pump 12 if the number of times or more during the period. When the pump 12 fails, the flow rate discharged from the filter device 14 rapidly decreases, so the second failure threshold is set in consideration of this.

The contamination determination unit 185d checks the information output from the data collection unit 185a to determine whether the filter device 14 is contaminated, and when it is determined that the filter device 14 is contaminated, the result is sent to the management server 2. (2), specifically, when the flow rate value output from the second sensor 15 is within a predetermined contamination limit range during the supply of urea water, the filter device is more than a certain number of times during a certain period of time (14) is a configuration that determines that it is contaminated. When the filter net 142 of the filter device 14 is contaminated and clogged, the flow rate discharged from the filter device 14 decreases, so the contamination limit range is set in consideration of this. That is, the first failure limit value has the largest value, the second failure limit value has the smallest value, and the contamination limit range is located between the first failure limit value and the second failure limit value. For example, when the first failure limit value is set to 10, the second failure limit value is set to 2, and the contamination limit range is set to 2 to 5, and the output value of the second sensor is 11, it is determined that the filter device is out of order, When the output value of the second sensor is 1, it is determined that the motor is out of order, when the output value of the second sensor is 4, it is determined that the filter device is contaminated, and when the output value of the second sensor is 6, the filter determination unit It will not output any information.

The urea water supply system according to another embodiment of the present invention includes a supplier terminal 100, a cleaner terminal 200, an operator terminal 300, a plurality of injection devices 1 installed in different regions, and a management server ( 2), etc. Since the injection device 1 has been described above, a detailed description thereof will be omitted.

The supplier terminal 100 is a configuration used by a company that produces and supplies urea water to exchange information with the management server 2, and the supplier terminal 100 can exchange information through the Internet. An electronic device capable of storing and storing information may be used, and for example, a PC, smart phone, tablet, and the like may be used. The cleaner terminal 200 enters into an agreement with the operator of the urea water supply system and exchanges information with the management server 2 This is the configuration you are using. The operator terminal 300 is a configuration used by an operator of the urea water supply system to exchange information with the management server 2 .

The management server 2 exchanges information with the supplier terminal 100, the cleaner terminal 200, the operator terminal 300, and a plurality of injection devices 1 installed in different regions to exchange information with the injection device ( A configuration for controlling the supply of urea water through 1), a transceiver 21 for transmitting and receiving information to and from the terminals 100, 200, and 300 and the injection device 1, and a pump or filter from the injection device 1 When the information that the device is out of order is output, information about this is output to the operator terminal, and when the information that the filter device is contaminated is output from the injection device (1), the cleaner terminal 200 is used to clean the filter device. When the repair and washing request unit 22 outputs information requesting the supply of urea water, and the injection device 1 outputs information requesting supply of urea water, requesting the supply of urea water to the supplier terminal 100 A supply request unit 24 that outputs a signal and completes a urea water supply contract when information to supply urea water is output from the supplier terminal 100, and urea water is supplied by the supply request unit 24 After the contract is completed, if the content of the supply contract is checked and it is confirmed that urea water is supplied after a certain period of time, the supply of urea water is stored in the storage tank to other injection devices at a certain distance from the injection device that outputs the signal requesting the supply of urea water. Request information on the level of urea water, and if information on the level of urea water is output from the other injection devices, check it to select other injection devices whose water level is higher than the standard, and select other injection devices and urea water A supply adjustment unit for outputting a signal to the operator terminal 300 to check the distance of the injection device requesting supply, recover some of the urea water from another injection device that is closest to the injection device, and supply it to the injection device that requested the supply of the urea solution ( 24), a storage unit 25 for storing setting information necessary for the operation of the system and information generated in the operation process of the system, and a control unit 26 for controlling the overall operation of the management server 2, etc. include A signal requesting the supply of urea water is output from the one injection device 1, and a contract is signed with the supplier to supply urea water. ) If there is a concern that urea water may not be sold, the supply adjustment unit 24 checks the level (ie, capacity) of urea water stored in other injection devices, selects other injection devices above a certain level, and selects another injection device from one injection device. A signal to collect some urea water from other selected injection devices in the closest distance and supply it to one injection device is transmitted to the operator so that the operator can collect some urea water from other injection devices and supply it to one injection device. This prevents the case where one injection device fails to sell urea water.

In the above, the applicant has described various embodiments of the present invention, but such embodiments are only one embodiment for implementing the technical idea of the present invention, and any changes or modifications are made according to the present invention as long as the technical idea of the present invention is implemented. should be construed as falling within the scope of

1: injection device 2: management server 11: storage tank
12: pump 13: first sensor 14: filter device
15: second sensor 16: nozzle device 17: operation display
18: controller 21: transmission and reception unit 22: repair cleaning request unit
23: supply request unit 24: supply adjustment unit 25: storage unit
26: control unit 141: housing 142: filter net
181: transmission and reception unit 182: urea water supply unit 183: state maintenance unit
184: supply request unit 185: filter determination unit 186: storage unit
187: control unit 141a: inlet 141b: outlet
185a: data collection unit 185b: first failure determination unit 185c: second failure determination unit
185d: contamination determination unit

Claims (5)

It includes a storage tank for storing urea water and a filter device for filtering the urea water stored in the storage tank,
The filter device comprises a housing including an inlet through which urea water is introduced and an outlet through which filtered urea water is discharged, and a filtering net positioned inside the housing to filter urea water introduced into the housing. water injection device. According to claim 1,
The urea water injection device includes a pump for supplying the urea water stored in the storage tank to the filter device, a sensor located at the rear of the filter device and measuring the flow rate of the urea water discharged from the filter device, the pump and It includes a controller that controls the operation of the sensor,
Inside the storage tank, a water level sensor for measuring the level of the stored urea water, a plurality of temperature sensors installed at regular intervals up and down to measure the temperature of the urea water, and a motor for stirring the urea water Urea water injection device, characterized in that for. According to claim 2,
The controller checks the information transmitted by the plurality of temperature sensors, and when the difference between the temperature values transmitted by each temperature sensor is greater than a preset reference value, operates the motor so that the urea solution is stirred, and then each temperature sensor measures When the difference between the temperature values is smaller than the reference value, if the level of the urea water stored in the storage tank is lower than the preset reference value by checking the information transmitted by the state holding unit for stopping the operation of the motor and the water level sensor, the urea water level is lower than the predetermined reference value. The number of elements characterized in that it comprises a supply request unit for generating a signal requesting the supply of, and a filter determination unit for determining whether the filter device is out of order and whether or not it is contaminated by analyzing the information output from the sensor for measuring the flow rate. injection device. According to claim 3,
When the flow rate value output from the sensor for measuring the flow rate of the urea water is greater than a predetermined first failure limit value during the supply of the urea water, the filter unit malfunctions in the filter unit when the number of times is greater than a predetermined number of times during a predetermined period. If the flow rate value output from the first failure determination unit and the sensor measuring the flow rate of the urea water during supply of the urea water is smaller than the preset second failure limit value, the pump operates more than a certain number of times during a certain period of time. If the flow rate value output from the second failure judgment unit that determines that a failure has occurred and the sensor that measures the flow rate of urea water during supply of urea water is within the preset pollution limit range, the case is more than a certain number of times during a certain period of time. and a contamination determination unit that determines that the filter device is contaminated, wherein the first failure limit value has a value greater than a second failure limit value, and the contamination limit range is between the first failure limit value and the second failure limit value. Urea water injection device, characterized in that located. It includes a plurality of injection devices installed in different regions and a management server that exchanges information with the plurality of injection devices and controls the supply of urea water through the injection device, wherein the injection device is the urea water injection device of claim 4 is used,
The management server outputs this information to the operator terminal when information that the pump or filter device is out of order is output from the injection device, and outputs information about the contamination of the filter device from the injection device to the cleaner terminal. A repair/washing request unit for outputting information requesting washing of the filter device, and outputting a signal requesting supply of urea water to the supplier terminal when the injection device outputs information requesting supply of urea water; When the information to supply urea water is output from the supplier terminal, the supply request unit that completes the urea water supply contract and the supply request unit confirm the contents of the supply contract after the urea water supply contract is completed, and a certain period When it is confirmed that the urea water is supplied after a certain period of time, information on the level of the urea water stored in the storage tank is requested from other injection devices at a certain distance from the injection device that outputs the signal requesting the supply of urea water, and the other injection devices are requested. If information on the level of urea water is output from the devices, check this to select other injection devices whose water level is higher than the standard, check the distance between the selected injection devices and the injection device requesting urea water supply, and supply the urea solution. And a supply adjustment unit for outputting a signal to the operator terminal to collect some of the urea water from another injection device closest to the injection device requesting the supply and supply it to the injection device requesting the supply of the urea solution. supply system.

Images