JP2023128883A - Software update apparatus - Google Patents

Abstract

To provide a software update apparatus for updating software.SOLUTION: A software update apparatus 1 which is connected to a household equipment apparatus 2 over a network to update software to be used in the household equipment apparatus 2 includes: an update file storage unit 10 which stores, as an update file, update software to be used for updating the software; an operation information acquisition unit 11 which acquires, from the household equipment apparatus 2, operation information indicating an operation condition of the household equipment apparatus 2; an operation condition determination unit 12 which determines whether or not the household equipment apparatus 2 is in operation on the basis of the operation information acquired by the operation information acquisition unit 11; a distribution target setting unit 13 which sets, on the basis of a result determined by the operation condition determination unit 12, the household equipment apparatus 2 which is not in operation at least, as a distribution target to which the update file is to be distributed; and an update file distribution unit 14 which distributes the update file to the household equipment apparatus 2 set as the distribution target.SELECTED DRAWING: Figure 1

Description

The present invention relates to a software update device that is connected to residential equipment via a network and updates software used in the residential equipment.

In recent years, the use of IoT in devices has progressed, and various services have been provided. Examples of such devices include residential equipment such as water heaters and fuel cells installed in houses. Some home appliances have a function of receiving remotely distributed software (parameters) and setting it up in the home appliance. As a technique related to such software distribution, for example, there is a technique described in Patent Document 1 whose source is shown below.

Patent Document 1 describes a fuel cell system. This fuel cell system includes a fuel cell unit having a fuel cell, a processor that executes a control program for operating the fuel cell, a memory including a first area and a second area, and an update instruction section. There is. The first area stores a first control program as a control program executed in the processor, and the second area stores a second control program as an updated control program executed in the processor instead of the first control program. A control program is stored. The update instruction unit is configured to switch the control program executed by the processor from the first control program to the second control program during a power generation stop period of the fuel cell.

JP2018-73546A

Software updates are often carried out irregularly, and may also be carried out to prevent problems, so it is desirable to update them quickly and reliably. Software updates are normally distributed from a server, but depending on network communication conditions and device conditions (other than outages), updates may not be possible or software updates may fail. Problems may occur due to not being updated. Further, depending on the software update status, there is a possibility that the intended operation will be affected, and energy saving and economic efficiency may also be affected. Furthermore, if a problem occurs, on-site repair will be required, which will cause trouble to the user.

Therefore, there is a need for a software update device that can quickly and reliably update software.

The characteristic configuration of the software update device according to the present invention is as follows:
A software update device that is connected to housing equipment via a network and updates software used in the housing equipment, comprising:
an update file storage unit that stores update software used for updating the software as an update file;
an operating information acquisition unit that acquires operating information indicating the operating status of the housing equipment from the housing equipment;
an operating state determination unit that determines whether the housing equipment is in operation based on the operating information acquired by the operating information acquisition unit;
a distribution target setting unit that sets at least the residential equipment that is not in operation as a distribution target for distributing the update file based on a determination result of the operating state determination unit;
an update file distribution unit that distributes the update file to the housing equipment set as the distribution target;
The point is that it has the following.

With such a characteristic configuration, it becomes possible to distribute updated software to be used in the home equipment via the network under optimal conditions while grasping the operating status of the home equipment. Further, it is possible to avoid a situation where an update file cannot be distributed depending on the operating state of the housing equipment. Therefore, it is possible to realize a software update device that can quickly and reliably update software.

Further, it is preferable that the distribution target setting unit sets the residential equipment whose operation is stopped as the distribution target.

With such a configuration, it is possible to avoid interfering with the operation of the housing equipment.

Further, it is preferable that the distribution target setting unit excludes the residential equipment whose operation has been stopped due to an error from the distribution targets.

With such a configuration, it is possible to avoid a situation where an update file cannot be distributed depending on the operating state of the housing equipment. Moreover, this makes it possible to avoid a situation where an update file cannot be updated even though it has been distributed, and a situation where the network is unnecessarily congested can be avoided.

Further, the software update device includes:
a load calculation unit that calculates a load on the update file distribution unit at a time when the update file distribution unit attempts to distribute the update file;
It is preferable to further include a distribution canceling section that causes the update file distribution section to stop distribution when the load calculated by the load calculation section is larger than a preset value.

With such a configuration, it is possible to reliably update the software used in the home equipment via the network under optimal conditions, depending on the load on the update file distribution unit.

Further, the software update device includes:
further comprising a communication state determination unit that determines the communication state of the network for each time zone in which one day is divided into predetermined time periods;
Preferably, the update file distribution unit distributes the update file while avoiding times when the communication state is worse than a preset standard.

With such a configuration, the time required to distribute update files can be shortened. Furthermore, it is possible to avoid a situation in which the communication state of the network deteriorates due to the distribution of the update file. Furthermore, it is possible to avoid a situation where distribution fails due to deterioration of network communication conditions.

In addition, the area where the housing equipment is managed is divided into multiple blocks,
A plurality of the housing equipment are included in the single block,
Preferably, the update file distribution unit distributes the update file for each group in which the plurality of housing equipment included in the single block is divided into a plurality of groups.

With this configuration, compared to distributing update files to residential equipment all at once, it is easier to avoid situations where network communication conditions deteriorate; It is possible to avoid a situation where the delivery fails due to this.

Further, it is preferable that the housing equipment is a fuel cell device.

For example, if the residential equipment is a fuel cell device, it is possible to update the software while reducing the impact on power generation.

FIG. 1 is a schematic diagram showing the configuration of a software update device. FIG. 3 is an explanatory diagram of the operating status of housing equipment. FIG. 2 is an explanatory diagram of the communication amount and distribution status for each hour. FIG. 7 is a diagram illustrating an example of grouping related to distribution of update files.

A software update device according to the present invention is configured with a function of updating software used in residential equipment connected via a network. The software update device 1 of this embodiment will be described below.

FIG. 1 shows a schematic diagram of a software update device 1. As shown in FIG. Further, FIG. 1 also shows residential equipment 2 connected to the software update device 1 via a network. The housing equipment 2 refers to the equipment installed in the housing 3, and specifically includes a water heater, a stove, a fan heater, an alarm, an air conditioner, a floor heating system, a fuel cell system, etc. installed in the housing 3. housing facilities. It also includes a remote control, which is an operating device for remotely controlling these devices. Such housing equipment 2 can grasp its own status (for example, whether it is normal or not) and is connected directly to the network or connected to the network via a remote control. The network is an Internet line, and includes both a wireless network and a wired network. For example, in the case of a wired network, it includes not only an optical cable line and a cable television line, but also other priority networks. Further, the software update device 1 and the housing equipment 2 are configured to be able to communicate bidirectionally via this network. As a result, various data are transmitted from the residential equipment 2 to the software update device 1, and the software update device 1 can grasp the device status of the residential equipment 2. Therefore, the software update device 1 not only updates the software used in the home equipment 2 but also functions as a server that manages the home equipment 2.

The software update device 1 updates software used in the housing equipment 2 via such a network. The software used in the housing equipment 2 is software that is built into the housing equipment 2 and corresponds to software that causes the housing equipment 2 to operate. As shown in FIG. 1, when there are multiple residential equipment 2 connected via a network, each residential equipment 2 is given identification information (for example, an identification number) to be managed so that they can be identified. It's good to do that.

Moreover, the software update device 1 is configured to be able to monitor the operating status (in operation, stopped, stopped due to an error) of the housing equipment 2 and monitor the equipment status (state of the housing equipment 2). The housing equipment 2 is equipped with a sensor (not shown) that detects the state of the equipment. When the housing equipment 2 is a fuel cell device, it is preferable to include a sensor that obtains information regarding the power generation state (for example, gas usage amount, power generation amount, temperature, etc.) using a sensor.

As shown in FIG. 1, the software update device 1 includes an update file storage section 10, an operation information acquisition section 11, an operation state determination section 12, a distribution target setting section 13, an update file distribution section 14, a load calculation section 15, a distribution It is configured to include a canceling unit 16 and a communication state determining unit 17, and each functional unit is constructed of hardware, software, or both, with a CPU as a core component, in order to perform processing related to software updates.

The update file storage unit 10 stores update software used for updating software as an update file. The update software used to update the software is software that updates the software installed in the housing equipment 2. Such update software is stored in the update file storage unit 10 in the form of an electronic file. As described above, the residential equipment 2 includes various types of equipment, and the update file storage unit 10 stores update software for each type and model number of the residential equipment 2. Of course, if there is a housing equipment 2 whose software does not need to be updated, it is not necessary to store update software for the housing equipment 2. Further, in the housing equipment 2, after the software installed in the update software is updated, it may be further updated. Therefore, the update file storage unit 10 may be configured to sequentially store update software when the update software is prepared. Of course, the update file storage unit 10 may be configured to store only the latest update software for each type and model number of the housing equipment 2.

The operating information acquisition unit 11 acquires operating information indicating the operating status of the housing equipment 2 from the housing equipment 2 . The operating status of the housing equipment 2 corresponds to the state of the housing equipment 2. As shown in FIG. 2, such driving conditions include at least "running" and "stopping". In addition, as shown in FIG. 2, "stopped" includes "stopped (normal)", which is a state in which the device is stopped in response to the user's intention, the device's own judgment, or a command from a management device (not shown). (hereinafter sometimes referred to as "stopping normally") and "stopping (error)" (hereinafter sometimes referred to as "stopping due to error") when the housing equipment 2 is stopped due to a problem in operation. ) should be separated. In this embodiment, information indicating such driving conditions is treated as driving information. The operating information is transmitted from the residential equipment 2 to the software update device 1 via the network at preset times in the residential equipment 2, and is acquired by the operating information acquisition unit 11. The driving information acquisition unit 11 preferably stores the acquired driving information for each housing equipment 2 together with time information indicating the time of acquisition.

Returning to FIG. 1, the operating state determining unit 12 determines whether the housing equipment 2 is in operation based on the operating information acquired by the operating information acquiring unit 11. The operation information acquired by the operation information acquisition unit 11 is information indicating the operating status of the housing equipment 2 transmitted from the housing equipment 2 via the network, and in this embodiment, the operation information acquired by the operation information acquisition unit 11 is information indicating the operating status of the housing equipment 2 transmitted via the network. remembered. The operating information also includes information indicating whether the housing equipment 2 is in operation, normally stopped, or stopped due to an error at the time the operating information is acquired. Therefore, the operating state determination unit 12 determines the operating information based on the operating information indicating the operating status of the housing equipment 2 that is stored in the operating information acquisition unit 11 and transmitted from the housing equipment 2 via the network. It is determined whether the housing equipment 2 is in operation at the time of acquisition.

Based on the determination result of the operating state determination unit 12, the distribution target setting unit 13 sets at least the residential equipment 2 that is not in operation as a distribution target for distributing the update file. The determination result of the operating state determining unit 12 is a result of the operating state determining unit 12 determining whether or not the housing equipment 2 is in operation. The software update device 1 is configured to avoid distributing update files when the housing equipment 2 is in operation in order to avoid problems, and to distribute update files to the housing equipment 2 that is not in operation. has been done. The distribution target to which the update file is distributed is the residential equipment 2 to which the software update device 1 distributes the update file.

At least the housing equipment 2 that is not in operation corresponds to the housing equipment 2 that is not operating. Therefore, the distribution target setting unit 13 sets the residential equipment 2 whose operation is stopped as a distribution target. At this time, even if the update file is distributed to the housing equipment 2 that has stopped operating due to an error, there is a possibility that the housing equipment 2 that has stopped operating due to an error will not be able to properly receive the updated file. be. Furthermore, even if the housing equipment 2 that has stopped operating due to an error receives the update file, it may not be able to update the software. Therefore, in this embodiment, the distribution target setting unit 13 excludes the housing equipment 2 whose operation has been stopped due to an error from the distribution targets. The housing equipment 2 whose operation has stopped due to an error can be identified based on the operation information as described above. Therefore, the distribution target setting unit 13 sets the residential equipment 2 that is normally stopped as the target for distributing the update file, and the residential equipment 2 that is in operation and the residential equipment 2 that is stopped due to an error will receive the updated file. It is better to exclude it from the target. It is preferable to manage such housing equipment 2 to be distributed based on the above-mentioned identification information.

Therefore, in the software update device 1, as shown in FIG. 2, the residential equipment 2 that is "in operation" is set to "disable" distribution, and the residential equipment 2 that is "normally stopped" is set to "possible" for distribution. It's good to do that. Further, it is preferable that distribution of the housing equipment 2 that is “stopped due to error” is “disabled”.

Returning to FIG. 1, the update file distribution unit 14 distributes the update file to the housing equipment 2 set as a distribution target. The residential equipment 2 set as a distribution target is the residential equipment 2 set by the above-mentioned distribution target setting unit 13 to which the update file is to be distributed. Therefore, the update file distribution unit 14 distributes the update file to the housing equipment 2 to which the update file is to be distributed. Note that, as described above, since identification information is assigned to the residential equipment 2, the residential equipment 2 distributed by the update file distribution unit 14 may also be managed based on the identification information.

The load calculation unit 15 calculates the load on the update file distribution unit 14 at the time when the update file distribution unit 14 attempts to distribute the update file. The time at which the update file distribution unit 14 attempts to distribute the update file is at least the time from when the distribution target setting unit 13 sets the distribution target housing equipment 2 to when the update file distribution unit 14 distributes the update file. It is a point in time between The load on the update file distribution unit 14 is the calculation load on the update file distribution unit 14, and for example, when the update file is being distributed to the housing equipment 2, the update file is not being distributed. The load will be greater than in the case of Furthermore, in addition to distributing the update file, for example, when information (identification information) indicating the housing equipment 2 to which the update file set by the distribution target setting unit 13 is to be distributed is acquired from the distribution target setting unit 13. The load also increases when receiving commands from a management device (not shown) or transmitting information to a management device (not shown). If the load on the update file distribution unit 14 is too large, there is a possibility that distribution of update files will be hindered. Therefore, the load calculation unit 15 calculates the load on the update file distribution unit 14 at least from the time the distribution target setting unit 13 sets the distribution target housing equipment 2 until the update file distribution unit 14 distributes the update file. Calculate. The load on the update file distribution unit 14 can be, for example, the operating rate or usage rate of the arithmetic processing unit included in the update file distribution unit 14, or the load on the update file distribution unit 14 can be the number of houses that can be simultaneously distributed. It is also possible to set the ratio between the number of equipment 2 and the number of residential equipment 2 to which updated software is currently being distributed. Furthermore, it is also possible to use the file size of an update file distributed to the housing equipment 2 or the amount of communication of information transmitted from the operating state determination unit 12. In addition, the load calculation unit 15 calculates the load at a predetermined point in time after the distribution target setting unit 13 sets the distribution target housing equipment 2 until the update file distribution unit 14 distributes the update file. However, it may be configured to calculate the average load from the time the distribution target setting unit 13 sets the distribution target housing equipment 2 until the update file distribution unit 14 distributes the update file. good. Note that a large load means the same thing as a heavy load.

The distribution canceling unit 16 causes the update file distribution unit 14 to cancel distribution when the load calculated by the load calculating unit 15 is larger than a preset value. The load calculated by the load calculation section 15 is the load on the update file distribution section 14. When the load on the update file distribution unit 14 has been calculated, the update file distribution unit 14 is scheduled to distribute the update file. For example, there is a certain amount of load on the update file distribution unit 14 that is scheduled to distribute update files, and if further update files are distributed, there is a possibility that the processing currently being performed by the update file distribution unit 14 will be hindered. Therefore, the distribution canceling unit 16 causes the update file distribution unit 14 to cancel the distribution when the load on the update file distribution unit 14 is larger than a preset value. When the distribution of the update file is canceled by the distribution cancellation unit 16, when the load on the update file distribution unit 14 becomes less than or equal to a preset value, the cancellation of the distribution is canceled and the update file distribution unit 14 The update file may be configured to be distributed, or the update file may be configured to be distributed when the update file is set as a distribution target by the distribution target setting unit 13.

The communication state determination unit 17 determines the communication state of the network for each time period in which one day is divided into predetermined time periods. The communication state of a network is an index indicating whether the amount of data (communication amount) being sent and received using lines constituting the network is large or small, and corresponds to so-called network traffic. In general, network communication speeds often slow down around lunchtime and between evening and midnight. Therefore, the communication state determination unit 17 checks the communication state of the network in the house 3 where the home equipment 2 is installed or the communication state of the network in the area including the home 3 where the home equipment 2 is installed at a predetermined time interval. Judgment is made for each time zone.

FIG. 3A shows an example of the amount of communication determined by the communication state determination unit 17. The example in FIG. 3A shows that the amount of communication is low from 0:00 to 8:00, and the amount of communication is moderate from 8:00 to 12:00. It is also shown that the amount of communication is high from 12:00 to 13:00, the amount of communication is moderate from 13:00 to 16:00, and the amount of communication is high from 16:00 to 24:00. The determination result of the communication state determination unit 17 is transmitted to the update file distribution unit 14. Note that "the amount of communication is small" means that the amount of data being transmitted along the network is less than the predetermined first data amount, and "the amount of communication is large" means that the amount of data being transmitted along the network is less than the first predetermined amount of data. The amount of data transmitted along the network is equal to or greater than the second amount of data, which is larger than the first amount of data, and the amount of communication is medium. This refers to a case where the amount of data is one or more and less than the second amount of data.

The update file distribution unit 14 distributes the update file while avoiding times when the communication state is worse than a preset standard. In other words, in the state of traffic shown in FIG. 3(a), distribution is performed from 0:00 to 8:00, and from 12:00 to 13:00 and from 12:00 to 13:00, as shown in FIG. 3(b). Distribution is not performed between 16:00 and 24:00 (distribution is prohibited). Further, it is preferable to perform distribution conditionally between 8:00 and 12:00 and between 1:00 and 16:00. Specifically, the update file may be distributed depending on the content (for example, importance level), or the number of residential equipment 2 to be distributed at the same time may be limited (reduced). . In addition, if an update schedule for software updates is set in advance, and if it is set during a time when communication volume is high, the number of distribution targets may be reduced or the timing of software updates may be changed. It is recommended that the number of distribution targets for software updates be increased during times when communication traffic is low, or that the timing of software updates may be brought forward. Further, the software may be updated during a time period when the amount of communication is low. For example, during times when the line is busy, the communication speed will decrease and it will take time to deliver the updated file. For example, the delivery may fail due to a term over, but the delivery time as described above By specifying the band, such delivery failures can be avoided. In addition, if the distribution fails, it is possible to configure the system to retry a preset number of times, or to set the update schedule again and distribute the updated file based on the new update schedule. It is also possible to configure it to do so.

Here, it is assumed that the area (management area) in which the software update device 1 manages the housing equipment 2 is divided into a plurality of areas as shown in FIG. In the example of FIG. 4, it is assumed that the management area is divided into four blocks: A block, B block, C block, and D block. Further, it is assumed that each block, that is, a single block, includes a plurality of housing equipment 2. In the example of FIG. 4, block A includes seven housing equipment 2, block B includes nine housing equipment 2, block C includes six housing equipment 2, and block D includes six housing equipment 2. Housing equipment 2 is included.

In this case, the update file distribution unit 14 preferably distributes the update file for each group in which the plurality of housing equipment 2 included in a single block is divided into a plurality of groups. In the example of FIG. 4, the plurality of housing equipment 2 belonging to each of A block, B block, C block, and D block are divided into three groups: a first group, a second group, and a third group. . Therefore, when distributing an update file to the housing equipment 2 belonging to A block, for example, the update file distribution unit 14 first selects one of the first group, second group, and third group of A block. The update file is distributed to the housing equipment 2 that belongs to one of the groups, and when this distribution is finished, the update file is distributed to the housing equipment 2 that belongs to one of the remaining two groups, and then this distribution ends. Then, it is preferable to distribute the update file to the housing equipment 2 belonging to the remaining groups. As a result, the timing of distribution in one block can be distributed (shifted in time), and it is possible to avoid a situation where distribution is concentrated within one group and the amount of communication becomes excessive. In addition, in such a case, when an update file is being distributed to the housing equipment 2 belonging to a predetermined group in block A, the update file may be distributed to the housing equipment 2 belonging to a predetermined group in another block. It may be configured as follows. It is preferable that the software update device 1 manages the housing equipment 2 using such a map. Moreover, the blocks and grouping described above may be performed manually or automatically. In addition, when distributing an update file based on such blocks and groupings, it is preferable to distribute the update file to the residential equipment 2 that is not in operation among the groups to which the update file is to be distributed.

By configuring as described above, the line usage rate of the network between the software update device 1 and the residential equipment 2 can be alleviated, that is, line congestion can be alleviated. Moreover, by configuring as described above, the residential equipment 2 that is set as a distribution target and is normally stopped receives the update file, and the software can be updated while it is normally stopped. Therefore, it is possible to update the software so that the operation of the housing equipment 2 is not hindered. Furthermore, by understanding and controlling the status of the housing equipment 2, it becomes possible to take into consideration the load on the software update device 1 and the alleviation of network congestion, and it becomes possible to update the software reliably. Furthermore, since the housing equipment 2 is in an optimal operating state, future failures can be suppressed and maintenance costs can be reduced. Furthermore, by linking with the network, it becomes possible to grasp the health of the housing equipment 2, which can lead to improvements in service.

[Another embodiment]
(1) In the above embodiment, it has been explained that the software update device 1 does not distribute update files to the residential equipment 2 that is stopped due to an error. For example, the software update device 1 can be configured to restore the residential equipment 2 that has stopped due to an error, or can be configured to automatically distribute update files in response to recovery. It is possible.

(2) In the above embodiment, it has been explained that the update file distribution unit 14 distributes the update file, but the update file distribution unit 14 once distributes the update file to the related terminal (terminal related to the housing equipment 2, that is, the housing equipment 2 to a remotely controllable remote control, a mobile terminal owned by the owner of the home equipment 2, etc.), and the information can be transmitted from this related terminal to the home equipment 2.

(3) In the above embodiment, the communication state determination unit 17 determines the communication state of the network, but the housing equipment 2 determines the communication state of the network and transmits this determination result to the software update device 1. It is also possible to configure it as follows. Further, it is also possible to configure both the communication state determination unit 17 and the housing equipment 2 to determine the communication state of the network. Further, these determinations may be made automatically or manually.

(4) In the above embodiment, it has been explained that the distribution target setting unit 13 sets the residential equipment 2 that is not operating as the distribution target, but for example, the residential equipment 2 that is undergoing trial operation due to maintenance. It is also possible to set it as a distribution target.

(5) In the above embodiment, it has been explained that the distribution target setting unit 13 excludes the housing equipment 2 that has stopped operation due to an error from the distribution target. It is also possible to configure so that residential equipment 2 that is stopped is set as a distribution target.

(6) In the above embodiment, the load calculation unit 15 calculates the load on the update file distribution unit 14 at the time when the update file distribution unit 14 is about to distribute the update file, and the distribution cancellation unit 16 It has been explained that when the load calculated by 15 is larger than a preset value, distribution by the update file distribution unit 14 is stopped. However, it is also possible to configure the update file distribution unit 14 to distribute the update file regardless of the load at the time when the update file is to be distributed.

(7) In the above embodiment, it has been explained that the update file distribution unit 14 distributes update files while avoiding times when the communication state is worse than a preset standard. It is also possible to configure the update file to be distributed regardless of the status.

In the above embodiment, the update file distribution unit 14 has been described as distributing the update file for each group in which the plurality of housing equipment 2 included in a single block is divided into a plurality of groups, but the update file distribution unit 14 However, it is also possible to configure the update file to be distributed regardless of blocks or groups.

Note that the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction, and The embodiments disclosed in this specification are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the purpose of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for a software update device that is connected to residential equipment via a network and updates software used in the residential equipment.

1: Software update device 2: Housing equipment 10: Update file storage unit 11: Operating information acquisition unit 12: Operating status determination unit 13: Distribution target setting unit 14: Update file distribution unit 15: Load calculation unit 16: Distribution cancellation unit 17: Communication status determination unit

Claims (7)

A software update device that is connected to housing equipment via a network and updates software used in the housing equipment, comprising:
an update file storage unit that stores update software used for updating the software as an update file;
an operating information acquisition unit that acquires operating information indicating the operating status of the housing equipment from the housing equipment;
an operating state determination unit that determines whether the housing equipment is in operation based on the operating information acquired by the operating information acquisition unit;
a distribution target setting unit that sets at least the residential equipment that is not in operation as a distribution target for distributing the update file based on a determination result of the operating state determination unit;
an update file distribution unit that distributes the update file to the housing equipment set as the distribution target;
A software update device comprising: The software update device according to claim 1, wherein the distribution target setting unit sets the residential equipment whose operation is stopped as the distribution target. The software update device according to claim 1 or 2, wherein the distribution target setting unit excludes the housing equipment whose operation has been stopped due to an error from the distribution targets. a load calculation unit that calculates a load on the update file distribution unit at a time when the update file distribution unit attempts to distribute the update file;
4 . The update file distribution unit according to claim 1 , further comprising a distribution canceling unit that causes the update file distribution unit to stop distribution when the load calculated by the load calculation unit is larger than a preset value. software update device. further comprising a communication state determination unit that determines the communication state of the network for each time zone in which one day is divided into predetermined time periods;
The software update device according to any one of claims 1 to 4, wherein the update file distribution unit distributes the update file while avoiding times when the communication state is worse than a preset standard. The area where the housing equipment is managed is divided into multiple blocks,
A plurality of the housing equipment are included in the single block,
6. The update file distribution unit distributes the update file for each group in which the plurality of housing equipment included in the single block is divided into a plurality of groups. Software update device. The software update device according to any one of claims 1 to 6, wherein the housing equipment is a fuel cell device.

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