JP2016091304A - Prepaid-type movable gas device and management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a prepaid-type movable gas device that can easily make payment for use charges including a gas bill with a prepaid card.SOLUTION: In a management system 30 of a movable gas device 1, a card management company issues a prepaid card C to a gas undertaker 35 from a card issuance management device 31, and the gas undertaker 35, who provides a user 36 with the movable gas device 1, records the amount of money that the user has pre-paid into the prepaid card C using a card charge device 32 and issues the prepaid card C to the user. The user allows a prepaid amount A1 to be read by placing the prepaid card C over a management unit 4 of the device 1, so that the user can use the gas device 1 for the prepaid amount of money under control of the management unit 4.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a prepaid mobile gas apparatus and a management system capable of managing a usage fee of a gas appliance such as a mobile gas heater equipped with a gas cylinder using a prepaid card.

  A method using a prepaid card is known as a method for adjusting a gas charge in a gas consumption area such as a house. In Patent Document 1, a gas sales company consigns and sells a memory card for payment of a gas charge from, for example, a convenience store, and each user pays a predetermined amount to purchase the memory card. When the user inserts the purchased memory card into the reader unit connected to the gas meter, the gas can be supplied while the memory card is inserted, and the balance data recorded on the memory card according to the supply amount Is subtracted, and when it reaches zero, the gas supply is stopped.

JP 2002-74497 A

  Conventionally, a gas fee prepaid system using a prepaid card such as an IC card has been used to charge a gas fee at a gas consumption place in a fixed position such as a house as described above. .

  Gas consumption places include gas supply sources, open spaces without gas supply pipes, and outdoors such as parks. In such a place, for example, a gas cylinder built-in type mobile gas heater is used. Such mobile gas appliances may be purchased, but may be rented or leased when used temporarily.

  As a gas billing method for gas cylinders, volume sales and mass sales methods are known. Compared to mass sales where the gas charge is calculated by measuring the weight of the gas cylinder, it is convenient to install a gas meter in volume sales and calculate the gas charge based on the meter reading result.

  Here, it is convenient for the gas company and the user to use the prepaid card to easily charge and pay for the use fee of the mobile gas appliance including the gas fee. However, conventionally, no attention has been paid to a system that is convenient for both gas companies and users using a prepaid card for the management of usage fees for mobile gas appliances. The current situation is that no proposals have been made for such systems.

  In view of this point, an object of the present invention is to provide a prepaid mobile gas apparatus and a management system that can easily perform billing and payment processing of a gas appliance including a gas fee using a prepaid card. To provide a system.

In order to solve the above problems, a prepaid mobile gas apparatus of the present invention includes a gas appliance using a gas cylinder as a gas supply source, and a management unit attached to the gas appliance. The management unit includes a gas usage amount calculation unit (gas meter) for calculating a gas usage amount supplied from the gas cylinder to the gas appliance, reading of a prepaid amount recorded in a prepaid card, and the prepaid card A read / write unit (card reader / writer) that performs a process of writing a prepaid balance after using the gas, and stores and holds the prepaid amount read by the read / write unit, from the prepaid amount to the gas usage amount A balance calculation unit (control unit) that performs a balance update process for calculating and storing the calculated prepaid balance in a form associated with the prepaid card; If there is any remaining money, gas from the gas cylinder to the gas appliance To allow the supply of the prepaid balance is provided with a gas supply control unit to stop the supply of gas to the gas appliance and becomes zero (control unit).

  Note that the “prepaid amount”, “prepaid balance”, and other monetary information can be displayed and stored in various forms, such as when representing the amount of money itself, or when representing these with numerical values such as frequency.

  In the mobile gas apparatus of the present invention, a management unit for performing billing and payment processing of equipment usage fees including gas charges using a prepaid card is attached to a mobile gas equipment using a gas cylinder as a gas supply source. It has been. Therefore, even if the gas consumption place is an indefinite place such as a park or a plaza, the user can immediately use the mobile gas device placed in that place by using the prepaid card, and the gas company side manages it. Volume of gas charges can be sold by the unit. Therefore, it is possible to construct a billing / payment system for the usage fee of the mobile gas apparatus that is convenient for both the user and the gas company.

  In the mobile gas apparatus of the present invention, in order to be able to add a prepaid amount using a prepaid card, when the prepaid card enters the pre-set read / write area, the prepaid card starts from the prepaid card. A first card reading process for reading the prepaid amount is performed. The balance calculation unit calculates a total amount by adding the read prepaid amount to the stored prepaid balance, and performs a balance rewriting process for storing and storing the total amount as the prepaid balance. When the balance rewriting process is performed, the read / write unit is assigned to a first card writing process for rewriting the prepaid amount of the prepaid card to zero, a date and time of the first writing process, and the management unit. And a second card writing process for writing the unit unique number to the prepaid card.

  The prepaid amount of the prepaid card becomes zero after charging the management unit. If there is a balance remaining on the prepaid card, there is a risk that the balance cannot be settled if the prepaid card is lost. In the present invention, every time the prepaid card is used, the balance is reset to zero. Losing a prepaid card with zero balance will not cause significant damage to the user. In addition, the gas business operator who provides the mobile gas apparatus can perform the settlement process based on the prepaid balance recorded in the management unit.

  In the mobile gas apparatus of the present invention, the read / write unit is stored and held in the balance calculation unit in the prepaid card when the prepaid card in which zero is written as the prepaid amount enters the read / write area. The third card writing process for writing the prepaid balance, and the fourth writing process for writing the date and time of the third card writing process and the unit unique number of the management unit may be performed. When the fourth write process is performed, the balance calculation unit performs a process of rewriting the stored prepaid balance to zero. When the prepaid balance is rewritten to zero, the gas supply control unit performs a gas shut-off process for stopping the supply of gas to the gas appliance.

  Without requiring a complicated operation, the user can transfer the balance to the prepaid card by simply holding the prepaid card with no balance over the read / write unit of the management unit or inserting it from the card insertion slot. For example, by handing this prepaid card to a gas company, it is also possible to perform a payment process for a usage fee including a gas fee for a gas appliance that has been paid in advance.

  Here, the management unit inputs an opening instruction for enabling gas supply from the gas cylinder and a manual operation member (open / close button) for inputting a closing instruction for stopping the gas supply, and gas supply from the gas cylinder to the gas appliance And a gas shut-off valve that opens and closes the path, the gas supply control unit opens and closes the gas shut-off valve based on the opening instruction and the closing instruction, and is stored and held in the balance calculation unit When the prepaid balance becomes zero and when the prepaid balance is rewritten to zero, the gas shut-off valve may be controlled to be closed regardless of the presence or absence of the opening instruction.

  In addition, in order for the user to understand the operating state of the mobile gas device, the management unit is configured to use the gas usage amount, the prepaid balance, the open / close state of the gas cutoff valve, and the second write to the prepaid card. It is desirable to provide a display unit for displaying at least one of a process end notification indicating that the process or the fourth write process has ended.

  Next, a management system that manages the prepaid mobile gas device having the above-described configuration includes a card issuance management unit that issues and manages the prepaid card, and a process of writing the prepaid amount to the prepaid card according to a deposit amount A card charge unit for

  As a management system for the mobile gas device, a management system in which the card issue management device and the card charging device are configured separately can be used.

  In this case, it is desirable that the card issuance management device and the card charging device have an online configuration in which communication is possible via a dedicated communication line or a general communication line.

  In the management system in this case, the card issuance management device generates a unique number for management and assigns it to each issued prepaid card, and the mobile gas usable by the prepaid card. An operator code assigning unit for assigning an operator code for identifying an operator providing the device, a serial number assigning unit for assigning a serial number to each prepaid card in the order of issuing the prepaid card, an issue history of the prepaid card, and A card history management unit that records and holds a usage history, a communication unit that communicates with the card charging device, and a card lead that writes the unique number, the operator code, and the serial number to the prepaid card The card unit via the light unit and the communication unit. Based on the card authentication information provided from the over-di device performs authentication of the prepaid cards used in the card charging device, it is desirable to provide a card authentication unit returns the authentication result.

  On the card issuance management device side, the prepaid card used in each card charging device placed on each gas business operator side is authenticated, so the security level against fraud such as the use of counterfeit cards in the system is increased. Can do. As the card authentication information, any one of the above management unique number, business operator code, serial number, card history, unit unique number of the management unit attached to each mobile gas device, or Combinations of these can be used.

  In this case, the card charging device includes a read / write unit that writes and reads information to and from the prepaid card that has entered the read / write area, and a communication unit that performs communication between the card issue management device, Via the communication unit, the card authentication information read by the read / write unit is transmitted to the card issuance management device, the card authentication unit for receiving the authentication result, and the received prepaid amount after authentication. A deposit processing unit for writing to the prepaid card, and a card use history notifying unit for transmitting a card usage history including processing contents and processing date / time for the prepaid card to the card issuance management device via the communication unit are arranged. Is done.

It is explanatory drawing which shows an example of the mobile gas apparatus of the prepaid system to which this invention is applied. It is a schematic block diagram which shows the management unit attached to the mobile gas apparatus of FIG. It is a whole block diagram which shows an example of the management system of the mobile gas apparatus of FIG. It is a schematic flowchart which shows the charge operation of the prepaid amount with respect to the management unit of the mobile gas apparatus of FIG. It is a schematic flowchart which shows the operation | movement at the time of completion | finish of use of the mobile gas apparatus of FIG.

  DESCRIPTION OF EMBODIMENTS Embodiments of a prepaid mobile gas apparatus to which the present invention is applied and a management system thereof will be described below with reference to the drawings. In the following embodiments, the present invention is applied to a mobile gas heater using a gas cylinder as a gas supply source. The present invention is not limited to the following embodiment, and can be similarly applied to a mobile gas appliance such as a gas stove other than the gas heating appliance.

(Example of mobile gas equipment)
FIG. 1 is a schematic configuration diagram illustrating an example of a prepaid mobile gas apparatus according to an embodiment. A prepaid mobile gas device 1 (hereinafter referred to as “mobile gas device 1”) includes a gas heater 3 that is a gas appliance using a gas cylinder 2 as a gas supply source, and a management unit attached to the gas heater 3. 4 is provided. The management unit 4 calculates the gas charge supplied from the gas cylinder 2 to the gas heater 3 by the volume sales method.

  The gas heater 3 includes a main body case 6 in which a gas cylinder mounting portion 5 to which the gas cylinder 2 is detachably mounted is formed. The gas combustion unit 7 (gas heater) of the gas heater 3 is attached to, for example, the upper end of the main body case 6, and gas is supplied from the gas cylinder 2 attached to the gas cylinder attachment unit 5 via the built-in gas supply pipe 8. Is supplied. The management unit 4 is attached to the outer peripheral surface of the case portion of the main body case 6 where the gas cylinder mounting portion 5 is formed.

  As described below, the management unit 4 includes a gas meter 11 and a control device 12, and a gas cutoff valve 14 is disposed in a gas passage 13 for measuring a gas flow rate of the gas meter 11. In this example, the gas meter 11 and the control device 12 are wired and connected as separate components, but they may be integrated into a common case. The gas meter 11 and the control device 12 are respectively provided with display units 15 and 16 and display their operation states and the like. Further, the control device 12 is provided with an open button 17a and a stop button 17b for inputting an instruction to start and stop the gas supply below the display unit 16.

FIG. 2 is a schematic configuration diagram of the management unit 4 of the mobile gas apparatus 1. As shown in this figure, the gas meter 11 of the management unit 4 integrates the measured gas flow rate with a measuring unit 21 that measures the gas flow rate supplied from the gas cylinder 2 to the gas combustion unit 7 of the gas heater 3. The integrating unit 22 that calculates the usage amount and the control unit 23 that performs drive control of the gas cutoff valve 14 and the like are provided. Further, a communication terminal 24 is connected to the control unit 23 and performs communication with the control device 12. Further, in the integrating unit 22, the volume value of the gas cylinder 2 to be installed is set, and the remaining amount of the gas cylinder 2 can be managed based on the gas flow rate from the time when the full gas cylinder 2 is installed. . In this case, when an input unit is arranged in the gas meter 11 to input that the gas cylinder 2 has been replaced, and the gas company that has replaced the gas cylinder 2 inputs that the gas cylinder 2 has been replaced from the input unit, Under the control of the control unit 23, the integrating unit 22 may reset the management remaining amount of the gas cylinder 2 so as to newly start the remaining amount management operation. In this case, when the remaining amount of the gas cylinder 2 is low, a warning display for notifying that the replacement time is near may be performed.

  The control device 12 performs a subtraction process for subtracting the gas charge from the prepaid amount based on the gas usage calculated by the gas meter 11. The control device 12 calculates a remaining amount based on, for example, a card reader / writer 25 that reads / writes a prepaid card C made of an IC card, and a gas usage amount transmitted from the gas meter 11 via the communication unit 26. And a gas supply control unit 28 for controlling the supply of gas from the gas cylinder 2 based on the prepaid balance. The gas supply control unit 28 transmits a command for instructing opening and closing of the gas cutoff valve 14 of the gas meter 11.

  The card reader / writer 25 reads the prepaid amount A1 recorded in the prepaid card C issued to the user of the mobile gas apparatus 1 as described later, and the prepaid balance after using the gas to the prepaid card C A2 writing processing can be performed. The balance calculation unit 27 stores and holds the prepaid amount A1 read by the card reader / writer 25. Further, while the gas in the gas cylinder 2 is being used, a balance for calculating the prepaid balance A2 by subtracting the gas charge A3 calculated based on the gas usage from the prepaid amount A1, and updating the prepaid balance A2 with the calculated value. The update process is repeated at regular intervals.

  In a state where the prepaid balance A2 remains, the gas supply control unit 28 transmits a command for opening the gas shut-off valve 14 to the gas meter 11 so that gas can be supplied from the gas cylinder 2 to the gas heating appliance 3 To. Note that when the balance of the prepaid balance A2 becomes small, a remaining amount warning may be displayed to notify that the time when the balance becomes zero is almost reached. It is also possible to change the remaining amount at which this remaining amount warning is generated. When the prepaid balance A2 becomes zero, a shut-off command for forcibly shutting off the gas shut-off valve 14 is transmitted to the gas meter 11 side, and the supply of gas to the gas heater 3 is stopped. Further, when the opening button 17a and the stop button 17b are operated, the gas supply control unit 28 transmits an opening command and a closing command for the gas shut-off valve 14 to the gas meter 11 side accordingly.

(Management system)
FIG. 3 is an overall configuration diagram illustrating an example of a management system that manages the mobile gas apparatus 1 having the above-described configuration. The management system 30 issues a card issuance management device 31 that issues and manages a prepaid card C used to use the mobile gas device 1 and a process of writing the prepaid amount A1 to the prepaid card C according to the user's deposit amount. And a card charging device 32 for performing. The card charging device 32 may be provided with a function of performing a payment processing for the usage fee of the mobile gas device 1 based on the prepaid balance A2 written in the prepaid card C. In the management system 30 of this example, the card issue management device 31 and the card charging device 32 can communicate via a dedicated communication line or a general communication line. For example, communication is possible via the Internet line 33.

The card issue management device 31 is installed in the management center 34 of the system operating company. The card charge device 32 is possessed by each gas company 35 that provides the mobile gas device 1. The mobile gas apparatus 1 is provided from the gas company 35 to the use place 37 of the user 36. The payment of the usage fee including the gas fee of the mobile gas device 1 is performed using the prepaid card C issued by the system operating company, that is, issued by the card issue management device 31.

  The card issue management device 31 of the management center 34 includes a personal computer 41, an input device 42 and a display device 43 connected thereto, and a card reader / writer 44. The personal computer 41 has a communication function for communicating with the card charging device 32 via the Internet line 33 and a communication function for communicating with the card reader / writer 44. In addition, a database DB for prepaid card issuance / authentication is provided. The database DB stores information D1 to D4 described below and other information in a form associated with the issued prepaid card C. Furthermore, the personal computer 41 realizes the following functions by executing the installed management program.

(1) A unique number assignment function that generates and assigns a management unique number D1 to each issued prepaid card C. (2) A gas operator 35 that provides a mobile gas apparatus 1 that can be used by the prepaid card C. (3) Serial number assignment function for assigning serial number D3 to each prepaid card C in order of issuance of prepaid card C (4) Issuance / use history of prepaid card C Card history management function for recording and holding D4 (5) Card authentication for authenticating the prepaid card C used in the card charging device 32 and returning the authentication result based on the card authentication information D5 provided from the card charging device 32 function

  The card reader / writer 44 writes the unique number D1, the business code D2, and the serial number D3 provided from the personal computer 41 to the unused prepaid card C or the used prepaid card C collected after use. . A prepaid card C on which these pieces of information are recorded is issued (distributed) to the gas company 35.

  On the other hand, the card charging device 32 owned by the gas company 35 also includes a personal computer 51, an input device 52 and a display device 53 connected thereto, and a card reader / writer 55. The personal computer 51 has a communication function for communicating with the card issuance management apparatus 31 via the Internet line 33 and a communication function for communicating with the card reader / writer 55. The personal computer 51 implements the following functions by executing the installed processing program.

(A) A card authentication function for transmitting the card authentication information D5 read from the prepaid card C by the card reader / writer 55 to the card issuance management device 31 and receiving an authentication result. (B) A prepaid amount A1 prepaid by the user. , Deposit processing function to be written to prepaid card C after authentication (c) Card usage history report for sending card issuance / use history update information D4a including processing contents and processing date / time for prepaid card C to card issuing management device 31 Function A settlement process for executing a processing program, performing a settlement process for the usage fee of the mobile gas apparatus 1 based on the prepaid balance A2 recorded in the prepaid card C after the authentication, and calculating a refund amount It is also possible to realize the function.

(Description of operation)
Next, an operation example when the mobile gas apparatus 1 is used using the prepaid card C issued by the management system 30 having the above configuration will be described.

  The prepaid card C issued from the management center 34 is provided to the gas company 35. The user 36 purchases the prepaid card C from the gas company 35, and an amount obtained by subtracting the usage fee of the mobile gas apparatus 1 from the payment price at that time is recorded on the prepaid card C as a prepaid amount A1. The user 36 can charge the prepaid amount A1 to the control device 12 by holding the prepaid card C over the card reader / writer 25 of the mobile gas apparatus 1 installed at the use place 37 by the gas company 35.

<Prepaid charge processing>
FIG. 4 is a schematic flowchart showing the charging operation by the management unit 4 of the mobile gas apparatus 1. Describing according to this schematic flowchart, when the prepaid card C enters a preset read / write area (when the prepaid card C is detected), the card reader / writer 25 performs card authentication (step ST1). The authentication is performed based on the read card authentication information D5 by reading the card authentication information D5 (property: serial number, security information) from the prepaid card C. It is also possible to transmit the read card authentication information D5 to the card issuance management apparatus 31 and perform authentication on the card issuance management apparatus 31 side. Based on the authentication result, the management unit 4 performs a first card reading process for reading the prepaid amount A1 from the prepaid card C when the prepaid card C is usable (step ST2).

  The remaining amount calculation unit 27 of the management unit 4 calculates the total amount by adding the read prepaid amount A1 to the stored prepaid amount A2, and rewrites and stores the prepaid amount A2 in the total amount. A balance rewriting process is performed (step ST3). Since the prepaid balance A2 is zero at the first use, the prepaid amount A1 is written as the prepaid balance A2. Thereafter, the card reader / writer 25 performs the first card writing process for rewriting the prepaid amount A1 of the prepaid card C to zero, the date and time D6 of the first writing process, and the unit unique number assigned to the management unit 4. A second card writing process for writing D7 into the prepaid card C is performed (step ST4).

<Operation during use of mobile gas equipment>
In a state where there is a prepaid balance recorded in the management unit 4 after charging as described above, the mobile gas apparatus 1 can be used. When the user 36 starts using the mobile gas apparatus 1, first, the user 36 inputs an instruction by operating the open button 17 a of the management unit 4. The management unit 4 instructs the gas meter 11 to open the gas cutoff valve 14, and the gas meter 11 opens the gas cutoff valve 14. Thereby, use of gas is attained and the mobile gas apparatus 1 can be utilized.

  When the mobile gas device 1 is used and gas is consumed, the gas usage amount is calculated by the gas meter 11. The gas supply control unit 28 of the management unit 4 issues a command for forcibly shutting off the gas shutoff valve 14 to the gas meter 11 when the prepaid balance A2 stored and held in the balance calculation unit 27 becomes zero. Thereby, supply of gas is stopped.

  Further, when the user 36 operates the stop button 17b to end the use of the mobile gas apparatus 1, the gas supply control unit 28 issues a command to shut off the gas shutoff valve 14 to the gas meter 11. This stops the gas supply.

During use of the mobile gas apparatus 1, the display unit 15 of the gas meter 11 of the management unit 4 displays an operation state including the amount of gas used. Further, the display unit 16 of the control device 12 displays the prepaid balance A2, the operation state including the open / close state of the gas shut-off valve, and the like.

<End-of-use processing>
When the prepaid balance A2 remains after the use of the mobile gas apparatus 1 as described above, a process of writing the prepaid balance A2 to the prepaid card C is performed as follows.

  FIG. 5 is a schematic flowchart showing the use end process. Referring to this figure, first, the user 36 holds the prepaid card C over the card reader / writer 25 of the management unit 4. The card reader / writer 25 that has detected the prepaid card C authenticates the prepaid card C (step ST11). It is also possible to perform authentication by the card issue management device 31 and receive the authentication result.

  When “0” is written as the prepaid amount A1 of the prepaid card C after authentication, the third card writing process for writing the prepaid balance A2 stored and held in the balance calculation section 27 to the prepaid card C Then, a fourth writing process for writing the date and time D8 of the third card writing process and the unit unique number D7 of the management unit 4 is performed (steps ST12 and ST13).

  Thereafter, the balance calculation unit 27 performs a process of rewriting the stored prepaid balance A2 to zero (step ST14). When the prepaid balance A2 is rewritten to zero, the gas supply control unit 28 instructs gas cutoff (step ST15).

  Thereafter, the user 36 returns the prepaid card C to the gas company 35. The gas company 35 collects the prepaid card C and the mobile gas device 1, and the series of use of the mobile gas device 1 ends. In addition, based on the prepaid balance of the prepaid card C, it is also possible to perform the payment processing of the usage fee of the mobile gas apparatus 1. In this case, the prepaid card C can be held over the card charging device 32, and the card charging device 32 can perform processing for calculating a refund amount by reducing the amount including a predetermined fee.

(Another example of management system)
Note that a management system having the following configuration may be used instead of the management system 30 described above.

  First, the card issue management device 31 and the card charging device 32 can be a management device constructed using a single personal computer. For example, such a system can be used when the management center 34 and the gas company 35 are the same.

  Further, the card issue management device 31 and the card charging device 32 can be configured offline. In this case, since the prepaid card authentication procedure cannot be performed in real time, the security is lower than that of the management system 30 described above. Therefore, it can be used as a management system consisting of a limited number of gas operators.

DESCRIPTION OF SYMBOLS 1 Mobile gas apparatus, 2 Gas cylinder, 3 Gas heating appliance, 4 Management unit, 5 Gas cylinder mounting part, 6 Main body case, 7 Gas combustion part, 8 Gas supply pipe, 11 Gas meter, 12 Control apparatus, 13 Gas passage, 14 Gas Shut-off valve, 15, 16 display unit, 17a open button, 17b stop button, 21 measuring unit, 22 integrating unit, 23 control unit, 24 communication terminal, 25 card reader / writer, 26 communication unit, 27 balance calculation unit, 28
Gas supply control unit, 30 management system, 31 card issuance management device, 32 card charging device, 33 internet line, 34 management center, 35 gas operator, 36 users, 41 personal computer, 42 input device, 43 display device, 44 card Reader / writer, 51 personal computer, 52 input device, 53 display device, 55 card reader / writer, C prepaid card, DB database, D1 management unique number, D2 business code, D3 serial number, D4 issuance / use history, D5 Card authentication information, D6 writing process date, D7 unit unique number, A1
Prepaid amount, A2 prepaid balance, A3 gas fee

Claims (11)

A gas appliance using a gas cylinder as a gas supply source;
A management unit attached to the gas appliance;
Have
The management unit is
A gas use amount calculation unit for calculating a gas use amount supplied from the gas cylinder to the gas appliance;
A read / write unit that reads a prepaid amount recorded in a prepaid card and writes a prepaid balance after using gas to the prepaid card;
The prepaid amount read by the read / write unit is stored and held, and the prepaid balance is calculated by subtracting the gas fee calculated based on the gas usage from the prepaid amount at a predetermined cycle, A balance calculation unit for performing a balance update process for storing and holding a prepaid balance in a form associated with the prepaid card;
A gas supply control unit that enables supply of gas from the gas cylinder to the gas appliance when the prepaid balance remains, and stops supply of gas to the gas appliance when the prepaid balance becomes zero;
A prepaid mobile gas device characterized by comprising: When the prepaid card enters a preset read / write area, the read / write unit performs a first card reading process of reading the prepaid amount from the prepaid card,
The balance calculation unit calculates a total amount by adding the read prepaid amount to the stored prepaid balance, and performs a balance rewriting process for storing and storing the total amount as the prepaid balance,
When the balance rewriting process is performed, the read / write unit is assigned to a first card writing process for rewriting the prepaid amount of the prepaid card to zero, a date and time of the first card writing process, and the management unit. A second card writing process for writing the unit unique number to the prepaid card.
The prepaid mobile gas device according to claim 1. When the prepaid card in which zero is written as the prepaid amount enters the read / write area, the read / write unit writes the prepaid balance stored in the balance calculation unit to the prepaid card. Card writing process and a fourth writing process for writing the date and time of the third card writing process and the unit unique number of the management unit,
When the fourth writing process is performed, the balance calculation unit performs a process of rewriting the stored prepaid balance to zero,
When the prepaid balance is rewritten to zero, the gas supply control unit performs a gas shut-off process for stopping gas supply to the gas appliance.
The prepaid mobile gas device according to claim 2. The management unit is
A manual operation member for inputting an opening instruction for enabling gas supply from the gas cylinder and a closing instruction for stopping the gas supply;
A gas cutoff valve that opens and closes a gas supply path from the gas cylinder to the gas combustion section;
With
The gas supply controller is
Open and close the gas shut-off valve based on the opening instruction and the closing instruction;
Control that closes the gas shut-off valve regardless of the presence or absence of the opening instruction when the prepaid balance stored in the balance calculation section becomes zero and when the prepaid balance is rewritten to zero The prepaid type mobile gas apparatus according to claim 3, wherein: The management unit is
The gas consumption,
The prepaid balance,
The open / close state of the gas shut-off valve, and
5. The display device according to claim 1, further comprising a display unit configured to display at least one of a process completion notification indicating that the second card writing process or the fourth writing process with respect to the prepaid card has been completed. The prepaid type mobile gas device according to any one of the items.   The prepaid mobile gas device according to any one of claims 1 to 5, wherein the gas appliance is a gas heater or a gas stove. A management system for managing the prepaid mobile gas device according to any one of claims 1 to 6,
A card issuance management unit for issuing and managing the prepaid card;
A card charging unit for performing processing of writing the prepaid amount into the prepaid card according to a deposit amount;
The management system characterized by having. A management system for managing the prepaid mobile gas device according to any one of claims 1 to 6,
A card issue management device for issuing and managing the prepaid card;
A card charging device for performing a process of writing the prepaid amount into the prepaid card according to a deposit amount;
The management system characterized by having. A management system for managing the prepaid mobile gas device according to any one of claims 1 to 6,
A card issue management device for issuing and managing the prepaid card;
A card charging device for performing a process of writing the prepaid amount into the prepaid card according to a deposit amount;
Have
The card issuing management device and the card charging device can communicate via a dedicated communication line or a general communication line. The card issue management device is:
A unique number assignment unit that generates and assigns a unique number for management to each issued prepaid card,
An operator code assigning unit for assigning an operator code for identifying an operator that provides the mobile gas device that can be used by the prepaid card;
A serial number assigning unit that assigns a serial number to each prepaid card in the order in which the prepaid cards are issued;
A card history management unit that records and holds issuance history and usage history of the prepaid card;
A communication unit for communicating with the card charging device;
A card read / write unit that writes the unique number, the business operator code, and the serial number to the prepaid card;
Based on card authentication information provided from the card charging device via the communication unit,
A card authentication unit for authenticating the prepaid card used in the card charging device and returning an authentication result;
The management system according to claim 9. The card charging device is:
A read / write unit for writing and reading information on the prepaid card that has entered the read / write area;
A communication unit that communicates with the card issue management device;
A card authentication unit that transmits the card authentication information read by the read / write unit to the card issuance management device and receives the authentication result via the communication unit;
A deposit processing unit for writing the deposited prepaid amount into the prepaid card after authentication;
A card usage history notifying unit that transmits a card usage history including processing contents and processing date and time for the prepaid card to the card issue management device via the communication unit;
The management system according to claim 10, comprising:

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