WO2019065407A1

WO2019065407A1 - Management system and filter management method

Info

Publication number: WO2019065407A1
Application number: PCT/JP2018/034643
Authority: WO
Inventors: 千鶴村上; 泰弘小田; 絵美桐谷
Original assignee: ダイキン工業株式会社
Priority date: 2017-09-29
Filing date: 2018-09-19
Publication date: 2019-04-04
Also published as: JP6627837B2; JP2019063729A

Abstract

An information acquisition unit (111) acquires first information (51) that can be used in deriving the cost of replacing a filter (23) and second information (52) that can be used in deriving the cost of driving a fan (22). On the basis of the information (51, 52) acquired by the information acquisition unit (111), a filter management unit (112) outputs filter replacement assistance information which is information for assisting in the replacement of the filter (23) and is based on the cost of replacing the filter (23) and the cost of driving the fan (22).

Description

Management system and filter management method

This disclosure relates to techniques for managing filters in an air treatment unit.

BACKGROUND Conventionally, an air processing unit having a fan and a filter provided in an air passage is known. In addition, techniques for managing such air treatment unit filters have been proposed. For example, Patent Document 1 describes a method for predicting clogging of an air filter for an air conditioning system. In this clogging prediction method, a system resistance value is obtained, a detection statistic is calculated using the obtained system resistance value, and it is predicted that the air filter should be replaced based on the detection statistic.

Japanese Patent Application Publication No. 2007-53673

However, in Patent Document 1, the total cost of ownership (TCO) including the cost required to replace the filter and the cost required to drive the fan is not taken into consideration. Therefore, it is not possible to replace the filter in consideration of the total cost of ownership.

Therefore, this disclosure aims to provide a management technology that can support filter replacement in consideration of the total cost of ownership.

A first aspect of the present disclosure relates to a management system for managing a filter (23) of an air processing unit (20) having a fan (22) provided in an air passage (21) and one or more filters (23). This management system can be used to derive the first information (51) that can be used to derive the cost required to replace the filter (23), and the second information that can be used to derive the cost required to drive the fan (22). An information acquisition unit (111) for acquiring information (52), and the first information (51) and the second information (52) acquired by the information acquisition unit (111), the filter (23) A filter management unit (112) for outputting filter replacement support information based on information for supporting replacement and cost for replacing the filter (23) and cost for driving the fan (22) There is.

In the first aspect, by outputting filter replacement support information based on the cost required to replace the filter (23) and the cost required to drive the fan (22), the cost needed to replace the filter (23) and the fan It is possible to support the replacement of the filter (23) in consideration of the total cost of ownership including the cost required to drive (22).

A second aspect of the present disclosure relates to the first aspect, wherein the second information (52) includes clogging related information (70) regarding a tendency of the clogging degree in the filter (23) to change with time. There is.

In the second aspect, the temporal change in the degree of clogging in the filter (23) is correlated with the cost required to drive the fan (22). Specifically, as the degree of clogging in the filter (23) increases, the pressure loss in the filter (23) increases, and as a result, the power consumption of the fan (22) increases, and the drive of the fan (22) Tend to be expensive. Therefore, the cost required to drive the fan (22) can be derived based on the clogging related information (70).

A third aspect of the disclosure relates to the second aspect, wherein the clogging related information (70) includes pressure loss related information (71) regarding a tendency of pressure loss over time in the filter (23). There is.

In the third aspect, the temporal change in pressure loss in the filter (23) is correlated with the temporal change in the degree of clogging in the filter (23). The temporal change in the degree of clogging in the filter (23) is correlated with the cost required to drive the fan (22). Specifically, as the degree of clogging in the filter (23) increases, the pressure loss in the filter (23) increases, and as a result, the power consumption of the fan (22) increases, and the drive of the fan (22) Tend to be expensive. Therefore, the cost required to drive the fan (22) can be derived based on the pressure loss related information (71).

A fourth aspect of the present disclosure relates to the second or third aspect, wherein the clogging related information (70) is dust accumulation related information related to the tendency of dust accumulation amount in the filter (23) to change with time (72 Contains).

In the fourth aspect, the temporal change of the dust accumulation amount in the filter (23) is correlated with the temporal change of the degree of clogging in the filter (23). The temporal change in the degree of clogging in the filter (23) is correlated with the cost required to drive the fan (22). Specifically, as the dust accumulation amount in the filter (23) increases, the degree of clogging in the filter (23) tends to increase. Then, as the degree of clogging in the filter (23) increases, the pressure loss in the filter (23) increases, and as a result, the power consumption of the fan (22) increases, and the cost required to drive the fan (22) Tend to be higher. Therefore, the cost required to drive the fan (22) can be derived based on the dust accumulation related information (72).

A fifth aspect of the present disclosure relates to any one of the first to fourth aspects, wherein the second information (52) relates to power consumption related to the tendency of the power consumption of the fan (22) to change with time. Contains information (75).

In the fifth aspect, the change with time of the power consumption of the fan (22) is correlated with the cost required to drive the fan (22). Specifically, as the pressure loss in the filter (23) increases, the power consumption of the fan (22) increases, and as a result, the cost required to drive the fan (22) tends to increase. Therefore, the cost required to drive the fan (22) can be derived based on the power consumption related information (75).

A sixth aspect of the present disclosure relates to any one of the first to fifth aspects, wherein the filter replacement support information includes the cost required to replace the filter (23) and the drive of the fan (22). It contains information on the total cost of ownership, including the costs involved.

In the sixth aspect, it is possible to facilitate the support of the replacement of the filter (23) in consideration of the total cost of ownership by outputting the filter exchange support information including the information on the total cost of ownership.

A seventh aspect of the present disclosure relates to any one of the first to sixth aspects, including the cost required to replace the filter (23) and the cost required to drive the fan (22). The filter replacement support information includes at least one of a recommended type of the filter (23) and a recommended replacement period corresponding to a total cost of ownership lower than a comparison target cost determined as a comparison target. Contains recommended exchange condition information indicating.

In the seventh aspect, by outputting the filter replacement support information including the recommended replacement condition information, it is possible to support the replacement of the filter (23) such that the total cost of ownership is smaller than the comparison target cost.

An eighth aspect of the present disclosure relates to the seventh aspect, wherein a type of the filter (23) installed in the air treatment unit (20) is the recommended type, and a predetermined cost determination In the period (U), the total cost of ownership required to replace the filter (23) at the recommended replacement cycle is lower than the cost to be compared.

In the eighth aspect, replacement of the filter (23) can be supported so that the total cost of ownership in the cost determination period (U) is smaller than the comparison target cost.

A ninth aspect of the present disclosure relates to the eighth aspect, wherein the cost to be compared sets the type of the filter (23) installed in the air treatment unit (20) as the type determined for the comparison. And, it corresponds to the total cost of ownership required when replacing the filter (23) in the replacement period at the comparison target within the cost determination period (U).

In the ninth aspect, the total cost of ownership in the cost determination period (U) is the comparison target cost in the cost determination period (U) (ie, the type of filter (23) installed in the air processing unit (20)). A filter (the total cost of ownership required when replacing the filter (23) in the cost determination period (U) in the replacement cycle determined as the comparison target) and the type determined as the comparison target (U) 23) can support exchange.

A tenth aspect of the disclosure manages a filter (23) of a plurality of air treatment units (20) having a fan (22) and one or more filters (23) each provided in an air passage (21). Management system, which can be used to derive the cost required to replace the filter (23) provided in any one of the plurality of air treatment units (20). An information acquisition unit (111) for acquiring first information (51) and second information (52) that can be used to derive the cost required to drive the fan (22) provided in the air processing unit (20) And the information acquisition unit (111) of the plurality of air processing units (20) based on the first information (51) and the second information (52) acquired by the information acquisition unit (111) First information (51 And second information (52) for supporting replacement of the filter (23) in the air processing unit (20), cost for replacing the filter (23), and driving of the fan (22) And a filter management unit (112) for outputting filter exchange support information based on the cost required for

In the tenth aspect, by outputting filter replacement support information based on the cost required to replace the filter (23) and the cost required to drive the fan (22), the cost needed to replace the filter (23) and the fan It is possible to support the replacement of the filter (23) in consideration of the total cost of ownership including the cost required to drive (22).

An eleventh aspect of the present disclosure relates to the tenth aspect, wherein the filter management unit (112) comprises a plurality of first information (51) and second information respectively associated with the plurality of air treatment units (20). Information indicating a simultaneous replacement cycle for replacing the filters (23) of the plurality of air treatment units (20) at the same time based on (52), the cost required for replacing the filter (23), and Output recommended simultaneous exchange information based on the cost required to drive the fan (22).

In the eleventh aspect, by outputting recommended simultaneous exchange information based on the cost required to replace the filter (23) and the cost required to drive the fan (22), a plurality of filters (the total cost of ownership is taken into account) Support the simultaneous exchange of 23).

A twelfth aspect of the present disclosure relates to the tenth or eleventh aspect, wherein the filter management unit (112) is provided for any one air treatment unit (20) of the plurality of air treatment units (20). The related filter replacement support information is output as filter replacement support information related to another air processing unit (20) different from the air processing unit (20) among the plurality of air processing units (20).

In the twelfth aspect, the filter replacement support information related to any one of the plurality of air treatment units (20) is used to select the air among the plurality of air treatment units (20). It is possible to support the replacement of the filter (23) in another air treatment unit (20) different from the treatment unit (20).

A thirteenth aspect of the present disclosure relates to a storage unit (104) of a filter (23) of an air processing unit (20) including a fan (22) provided in an air passage (21) and one or more filters (23). Filter management method managed by the control unit (105), the filter management method comprising: first information (51) that can be used to derive a cost required to replace the filter (23); 22) a first step of storing, in the storage unit (104), second information (52) which can be used for deriving the cost required for driving the drive unit; and the first information (51) stored in the storage unit (104). Information for supporting replacement of the filter (23) based on the second information (52) and cost for replacement of the filter (23) and cost for driving the fan (22) Filter exchange support information based on the control unit (105 And the second step of outputting.

In the thirteenth aspect, by outputting filter replacement support information based on the cost required to replace the filter (23) and the cost required to drive the fan (22), the cost needed to replace the filter (23) and the fan It is possible to support the replacement of the filter (23) in consideration of the total cost of ownership including the cost required to drive (22).

According to this disclosure, it is possible to support the replacement of the filter in consideration of the total cost of ownership including the cost required to replace the filter (23) and the cost required to drive the fan (22).

FIG. 1 is a diagram illustrating the configuration of a management system according to the first embodiment. FIG. 2 is a diagram illustrating filter cost information. FIG. 3 is a diagram illustrating pressure loss related information. FIG. 4 is a graph illustrating a pressure loss function. FIG. 5 is a diagram illustrating fan drive information. FIG. 6 is a diagram illustrating filter life information. FIG. 7 is a flowchart for explaining the operation of the management system. FIG. 8 is a graph for explaining the average pressure loss in the cost determination period. FIG. 9 is a flowchart for explaining the first derivation operation. FIG. 10 is a diagram illustrating the total cost of ownership derived in the first derivation operation. FIG. 11 is a graph illustrating the total cost of ownership derived in the first derivation operation. FIG. 12 is a diagram illustrating filter replacement support information. FIG. 13 is a diagram showing a display example of filter replacement support information. FIG. 14 is a flowchart for explaining the second derivation operation. FIG. 15 is a diagram illustrating the total cost of ownership derived in the second derivation operation. FIG. 16 is a flowchart for explaining the third derivation operation. FIG. 17 is a diagram illustrating the total cost of ownership derived in the third derivation operation. FIG. 18 is a flowchart for explaining the fourth derivation operation. FIG. 19 is a diagram illustrating the total cost of ownership derived in the fourth derivation operation. FIG. 20 is a diagram illustrating dust accumulation related information. FIG. 21 is a diagram illustrating power consumption related information. FIG. 22 is a diagram illustrating the configuration of a management system according to the second embodiment. FIG. 23 is a diagram illustrating the configuration of a management system according to a modification of the second embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and their description will not be repeated.

(Embodiment 1)
FIG. 1 illustrates the configuration of a management system (10) according to the first embodiment. Here, before describing the management system (10), the air processing unit (20) to be managed by the management system (10) will be described.

[Air treatment unit]
The air processing unit (20) is configured to supply the supply air (SA) to the air supply target space (SS). In this example, the air processing unit (20) takes in and processes outdoor air (OA) and room air (RA) from the outdoor space and the air supply target space (SS), respectively, and supplies processed air to the supplied air (SA). Supply to the air supply target space (SS). In addition, a part of air in the air supply target space (SS) is discharged out of the air supply target space (SS) as the exhaust air (EA). The air supply target space (SS) is, for example, a clean room.

The air processing unit (20) is provided with an air passage (21). In this example, one end (inflow end) of the air passage (21) is connected to the outdoor space and the air supply target space (SS) via a duct or the like, and the other end (outflow end) of the air passage (21) is It is connected to the air supply object space (SS) via a duct, etc. The air processing unit (20) has a fan (22) and one or more filters (23) provided in the air passage (21). The fan (22) is configured to convey air in the air passage (21). The filter (23) is configured to capture dust in the air passing through the filter (23).

In this example, three filters (a first filter (23a), a second filter (23b) and a third filter (23c)) are installed in the air treatment unit (20). In this example, the third filter (23c), the second filter (23b), the fan (22), and the first filter (23a) are directed from the upstream side to the downstream side of the air flow in the air passage (21). Are arranged in order. For example, the first filter (23a) is a HEPA filter (High Efficiency Particulate Air Filter), the second filter (23b) is a medium performance filter, and the third filter (23c) is a coarse dust filter.

The air processing unit (20) is provided with various sensors such as a flow rate sensor (31) and one or more differential pressure sensors (32) corresponding to one or more filters (23). The flow rate sensor (31) is configured to detect the flow rate of air flowing through the air passage (21). The differential pressure sensor (32) is configured to detect a pressure difference (air pressure difference) between the upstream side and the downstream side of the air flow of the filter (23). In this example, the air processing unit (20) includes three differential pressure sensors (a first differential pressure sensor (32a) and a second differential pressure sensor (32b) and a third difference) respectively corresponding to the three filters (23). A pressure sensor (32c) is provided.

[Management system]
The management system (10) is configured to manage a filter (23) of an air treatment unit (20) having a fan (22) provided in the air passage (21) and one or more filters (23) There is. In this example, the management system (10) comprises a storage device (100) and a management device (101).

<Storage device>
The storage device (100) is configured to store information used in the management system (10). For example, the storage device (100) is configured by a large capacity memory such as a hard disk drive. In this example, the storage device (100) stores the first information (51) and the second information (52).

Next, the first information (51) and the second information (52) will be described with reference to FIGS. In the following description, the type of filter (T) indicates the type of filter that can be used as the filter (23). Specifically, in this example, p (p is an integer of 2 or more) types (Ta1, Ta2,..., Tap) are set as the types of filters that can be used as the first filter (23a), As types of filters that can be used as the second filter (23b), q (q is an integer of 2 or more) types (Tb1, Tb2,..., Tbq) are set and used as the third filter (23c) As types of filters that can be performed, r (r is an integer of 2 or more) types (Tc1, Tc2, ..., Tcr) are set.

<First information>
The first information (51) is information that can be used to derive the cost required to replace the filter (23). In this example, the first information (51) includes filter cost information (60).

<< filter cost information >>
The filter cost information (60) is information on the cost required to replace the filter (23) once. As shown in FIG. 2, in this example, the filter cost information (60) indicates the filter cost (C) required to replace the filter (23) once. The filter cost (C) is the cost required to purchase the filter (23) (eg, the price of the filter (23)) and the cost required to replace the filter (23) (eg, labor cost required to replace the filter (23)) And the cost required to discard the filter (23).

Further, as shown in FIG. 2, in this example, filter cost information (60) is set for each type (T) of the filter (23). Specifically, p filter costs respectively indicating p filter costs (Ca1, Ca2, ..., Cap) corresponding to p types (Ta1, Ta2, ..., Tap) of the first filter (23a) Q filters showing information (60) and q filter costs (Cb1, Cb2,..., Cbq) corresponding to q types (Tb1, Tb2,..., Tbq) of the second filter (23b) R pieces of cost information (60) and r pieces of filter costs (Cc1, Cc2, ..., Ccr) corresponding to r types (Tc1, Tc2, ..., Tcr) of the third filter (23c) Filter cost information (60) is set.

<Second information>
The second information (52) is information that can be used to derive the cost required to drive the fan (22). In this example, the second information (52) includes clogging related information (70), fan drive information (80), and filter life information (90).

<< Clogging related information (pressure loss related information) >>
The clogging related information (70) is information on the tendency of the clogging degree of the filter (23) to change with time. The temporal change in the degree of clogging in the filter (23) is correlated with the cost required to drive the fan (22). Specifically, as the degree of clogging in the filter (23) becomes higher, the pressure loss in the filter (23) becomes higher, and as a result, the power consumption of the fan (22) becomes higher. The cost for driving tends to be high. Therefore, the cost required to drive the fan (22) can be derived based on the clogging related information (70).

In this example, the clogging related information (70) includes pressure loss related information (71). The pressure loss related information (71) is information on the tendency of the pressure loss in the filter (23) to change with time. As shown in FIG. 3, in this example, the pressure loss related information (71) indicates a pressure loss function (F _(t) ) corresponding to the tendency of the pressure loss in the filter (23) to change with time. As shown in FIG. 4, the pressure loss function (F _(t) ) shows a curve in which the pressure loss gradually increases from the initial pressure loss (P0) to the final pressure loss (Pf) as time passes. .

The temporal change in pressure loss in the filter (23) is correlated with the temporal change in the degree of clogging in the filter (23). The temporal change in the degree of clogging in the filter (23) is correlated with the cost required to drive the fan (22). Specifically, as the degree of clogging in the filter (23) becomes higher, the pressure loss in the filter (23) becomes higher, and as a result, the power consumption of the fan (22) becomes higher. The cost for driving tends to be high. Therefore, the cost required to drive the fan (22) can be derived based on the pressure loss related information (71).

Further, as shown in FIG. 3, in this example, pressure loss related information (71) (clogging related information (70)) is set for each type (T) of the filter (23). Specifically, p pressure loss functions (F _{a1 (t)} , F _{a2 (t)} ,..., F corresponding to the p types (Ta 1, Ta 2,..., Tap) of the first filter (23 a) p pressure loss related information (71) respectively indicating _{ap (t)} and q pressure loss functions (tb1, Tb2, ..., Tbq) corresponding to q types of the second filter (23b) Q pressure loss related information (71) indicating F _{b1 (t)} , F _{b2 (t)} , ..., F _{bq (t} ), and r types (Tc1, Tc2) of the third filter (23c) ,..., Tcr) and r pressure loss related information (71) respectively indicating r pressure loss functions (F _{c1 (t)} , F _{c2 (t)} ,..., F _{cr (t)} ) corresponding to It is set.

<< Fan drive information >>
The fan drive information (80) is information on the drive status of the fan (22). As shown in FIG. 5, in this example, fan drive information (80) includes information on supply air volume (Q), information on fan efficiency (η), and information on power consumption coefficient (α). . The supply air flow (Q) indicates the flow of the supply air (SA) to be supplied from the air processing unit (20). The fan efficiency (η) indicates the driving efficiency of the fan (22). The power consumption coefficient (α) indicates the electricity charge per unit power consumption of the fan (22).

Filter life information
The filter life information (90) is information on the life (use life) of the filter (23). As shown in FIG. 6, in this example, the filter life information (90) indicates the filter life (L). The filter life (L) is the period until the pressure loss in the filter (23) reaches a predetermined final value (final pressure loss (Pf)) from a predetermined initial value (initial pressure loss (P0)) Corresponds to the length of

Further, as shown in FIG. 6, in this example, filter life information (90) is set for each type (T) of the filter (23). Specifically, p filter lifetimes respectively indicating p filter lifetimes (La1, La2,..., Lap) corresponding to p types (Ta1, Ta2,..., Tap) of the first filter (23a) P filters showing information (90) and q filter lives (Lb1, Lb2,..., Lbq) corresponding to q types (Tb1, Tb2,..., Tbq) of the second filter (23b) R pieces of lifetime information (90) and r pieces of filter lifetimes (Lc1, Lc2, ..., Lcr) corresponding to r types (Tc1, Tc2, ..., Tcr) of the third filter (23c) Filter life information (90) is set.

<Management device>
As shown in FIG. 1, the management apparatus (101) includes an operation unit (102), a display unit (103), a storage unit (104), and a control unit (105).

<< Operation part and display part >>
The operation unit (102) is configured to be operated by the operator and to input information in accordance with the operation by the operator. For example, the operation unit (102) is configured of a keyboard, a mouse, and the like. The display unit (103) is configured to display information. For example, the display unit (103) is configured of a liquid crystal display panel or the like.

<< storage part >>
The storage unit (104) is configured to store information used in the control unit (105). The storage unit (104) stores programs and information for operating the control unit (105). For example, the storage unit (104) is configured by a memory.

Control section
The control unit (105) includes each part of the management system (10) (in this example, the storage unit (100), the operation unit (102), the display unit (103), the storage unit (104)) and the air processing unit (20). Signals are connected to each part (in this example, a fan (22) and various sensors such as a flow rate sensor (31) and a differential pressure sensor (32)). Then, the control unit (105) performs the operation of the management system (10) and the operation of the air treatment unit (20) based on the signals and information from the respective units of the management system (10) and the respective units of the air treatment unit (20). Is configured to control. For example, the control unit (105) is configured by an arithmetic processing unit such as a CPU.

Further, in this example, the control unit (105) includes an operation control unit (110), an information acquisition unit (111), and a filter management unit (112). That is, the operation control unit (110), the information acquisition unit (111), and the filter management unit (112) constitute part of the function of the control unit (105).

<Operation control unit>
The operation control unit (110) is configured to control the driving of the fan (22) such that the air volume of the air supplied from the air processing unit (20) becomes a predetermined air volume supplied. In this example, the supply air volume is a constant value, and the operation control unit (110) controls the drive of the fan (22) so that the supply air volume detected by the flow rate sensor (31) becomes a constant supply air volume. .

<Information acquisition unit>
The information acquisition unit (111) can be used to derive the first information (51) that can be used to derive the cost required to replace the filter (23) and the second information that can be used to derive the cost required to drive the fan (22). It is configured to obtain information (52). In this example, the first information (51) and the second information (52) acquired by the information acquisition unit (111) are stored in the storage unit (104).

<Filter Management Department>
The filter management unit (112) is configured to output filter replacement support information based on the first information (51) and the second information (52) acquired by the information acquisition unit (111). The filter replacement support information is information for assisting the replacement of the filter (23), and is information based on the cost required to replace the filter (23) and the cost required to drive the fan (22). In this example, the filter replacement support information includes information on the total cost of ownership including the cost of replacing the filter (23) and the cost of driving the fan (22). The filter replacement support information will be described in detail later.

For example, the filter management unit (112) outputs filter replacement support information via the display unit (103). Specifically, the filter management unit (112) outputs the filter replacement support information to the display unit (103), and the display unit (103) displays the filter replacement support information output by the filter management unit (112). Do.

[Management operation by management system]
Next, with reference to FIG. 7, a management operation (operation of managing the filter (23)) by the management system (10) will be described.

<Step (S11)>
The control unit (105) (specifically, the information acquisition unit (111)) acquires the first information (51) and the second information (52). Then, the control unit (105) stores the first information (51) and the second information (52) in the storage unit (104). In this example, the control unit (105) includes filter cost information (60), pressure loss related information (71), fan drive information (80) and filter life information (90) stored in the storage device (100). The filter cost information (60), the pressure loss related information (71), the fan drive information (80) and the filter life information (90) are stored in the storage unit (104).

<Step (S12)>
Next, the control unit (105) (specifically, the filter management unit (112)) receives the first information (51) and the second information (52) acquired in step (S11) (i.e., the storage unit (104)). Outputs filter replacement support information based on the cost required to replace the filter (23) and the cost required to drive the fan (22) based on the first information (51) and the second information (52) stored in Do. In this example, the control unit (105) includes filter cost information (60) stored in the storage unit (104), pressure loss related information (71), fan drive information (80), and filter life information (90). Based on the filter exchange support information.

Also, in this example, the filter replacement support information includes recommended replacement condition information. The recommended exchange condition information includes at least one of a recommended type of filter (23) (hereinafter referred to as “recommended type”) and a recommended exchange cycle of filter (23) (hereinafter referred to as “recommended exchange cycle”) It is information to show. The recommended type of the filter (23) and the recommended replacement cycle correspond to the total cost of ownership lower than the cost determined as the comparison target (hereinafter referred to as the “comparison target cost”). Specifically, the type of filter (23) installed in the air processing unit (20) is set as a recommended type, and the filter (23) is replaced at a recommended replacement cycle within a predetermined cost determination period (U) The total cost of ownership required to do this is lower than the cost to be compared.

In this example, the cost to be compared is the type of filter (23) set in the air processing unit (20) as the type determined for comparison (hereinafter referred to as "comparison type"), and the cost determination period This corresponds to the total cost of ownership required when replacing the filter (23) in (U) in the replacement cycle defined as the comparison target (hereinafter referred to as “comparison target replacement cycle”). For example, the comparison target type is set to the type of filter (23) currently installed in the air processing unit (20), and the comparison target replacement cycle is the filter (23) currently installed in the air processing unit (20). ) (The filter life (L) indicated in the filter life information corresponding to the type of filter (23)). That is, the comparison target cost is set, for example, to the total cost of ownership required when replacing the filter (23) currently installed in the air processing unit (20) in the lifetime.

In this example, the filter management unit (112) is configured to perform the first to fourth derivation operations (operations for deriving recommended replacement condition information). The derivation operation by the filter management unit (112) will be described in detail later.

Derivation of total cost of ownership
Next, derivation of the total cost of ownership within the cost determination period (U) will be described. The total cost of ownership within the cost determination period (U) is the cost required to replace the filter (23) within the cost determination period (U), and the cost required to drive the fan (22) within the cost determination period (U) Contains. Then, the total cost of ownership (TCO) within the cost determination period (U) can be expressed as the following equation 1.

The first term of the right side of Equation 1 corresponds to the cost required to replace the filter (23) in the cost determination period (U), and the second term of the right side of the equation 1 is a fan in the cost determination period (U) This corresponds to the cost required to drive (22). In Equation 1, "H _(t) " corresponds to the average pressure loss (H _(t) ) in the cost determination period (U). Further, in Equation 1, "[U / t]" is a Gaussian function, which corresponds to a quotient obtained by dividing the cost determination period (U) by the exchange period (t). For example, when the cost determination period (U) is “4” and the replacement period (t) is “2.5”, [U / t] is “1”.

As shown in FIG. 8, the average pressure loss (H _(t) ) in the cost determination period (U) is the number of times the filter (23) is replaced in the cost determination period (U) and the cost determination period (U). It changes according to the time-dependent change of the pressure loss of the filter (23). Then, the average pressure loss (H (t)) in the cost determination period (U) can be expressed as the following equation 2.

As described above, the total cost of ownership (TCO) within the cost determination period (U) can be expressed as equation 1, and the average pressure loss (H (t)) in equation 1 is expressed as equation 2. can do. Therefore, by substituting various parameter values into Equation 1 and Equation 2 and substituting Equation 2 into Equation 1, the total cost of ownership within the cost determination period (U) can be derived.

[First derivation operation]
Next, with reference to FIG. 9, a first derivation operation (operation for deriving recommended replacement condition information) by the filter management unit (112) will be described. In the first derivation operation, the filter management unit (112) generates first information (51) and second information (21) according to a predetermined cost determination period (U) and a predetermined type of filter (23). 52) and a plurality of total ownership costs (total cost of ownership within the cost determination period (U) respectively corresponding to a plurality of replacement cycles, based on the plurality of replacement cycles which become candidates for the recommended replacement cycle of the filter (23) Derive). Then, based on the derived total ownership costs, the filter management unit (112) selects, from among the plurality of replacement cycles that become candidates for the recommended replacement cycle of the filter (23), the total ownership lower than the comparison target cost. The replacement cycle of the filter (23) corresponding to the cost is detected, and the recommended replacement condition information indicating the detected replacement cycle of the filter (23) as the recommended replacement cycle of the filter (23) is derived (generated).

In the following, the first filter (23a) is to be processed, and the type of the first filter (23a) is set to one predetermined type (in this example, the first type (Ta1)), Set n exchange cycles (ta1, ta2, ..., tan) as candidates for the recommended exchange cycle of the filter (23a) to derive recommended exchange condition information indicating the recommended exchange cycle of the first filter (23a) The case will be described as an example. Here, n is an integer of 2 or more.

Further, in the following example, the cost determination period (U) is the filter life (90) indicated by the first filter life information (90) corresponding to the first type (Ta1) of the first filter (23a). It is set to La1). Also, the length of n exchange cycles (ta1, ta2,..., Tan) of the first filter (23a) is from the first exchange cycle (ta1) to the nth exchange cycle (tan) It is set to become shorter gradually. The length of the first exchange period (ta1) is equal to or less than the cost determination period (U).

<Step (S101)>
First, the filter management unit (112) selects the first exchange cycle (ta1) from among n exchange cycles (ta1, ta2,..., Tan) that become candidates for the recommended exchange cycle of the first filter (23a). Is selected for processing. As a result, the first exchange cycle (ta1) of the first filter (23a) is selected as the process target (i-th exchange cycle (tai)). Here, i is an integer of 1 or more and n or less.

<Step (S102)>
Next, the filter management unit (112) sets the first information (51) and the second information (52) corresponding to the predetermined cost determination period (U) and the predetermined type of the first filter (23a). And the total cost of ownership (cost determination period) corresponding to the i-th replacement cycle (tai) of the first filter (23a) based on the i-th replacement cycle (tai) of the first filter (23a) Deduce the total cost of ownership (TCO _i )) within (U).

In this example, the information acquisition unit (111) includes fan drive information (80) and first filter life information (90) corresponding to the first type (Ta1) of the first filter (23a). get. In addition, the information acquisition unit (111), the first filter cost information (60) corresponding to the first type (Ta1) of the first filter (23a) and the first pressure loss related information (71) To get

The filter management unit (112) calculates the supply air volume (Q), the fan efficiency (η) and the power consumption coefficient (α) indicated in the fan drive information (80) according to “Q”, “η” and “α And the filter life (Lal) indicated in the first filter life information (90) is substituted into "U" of Formula 1 and Formula 2. Further, the filter management unit (112) substitutes the filter cost (Ca1) shown in the first filter cost information (60) into "C" of the equation 1, and the first pressure loss related information (71 Substituting the pressure loss function (F _{a1 (t)} ) shown in) into "F _(t) " of equation 2. In addition, the filter management unit (112) substitutes the ith exchange period (tai) of the first filter (23a) into "t" of Equation 1 and Equation 2. Then, the filter management unit (112) substitutes Equation 2 into Equation 1. Thereby, the total cost of ownership (TCO _i ) corresponding to the i-th exchange period (tai) of the first filter (23a) is derived.

<Step (S103)>
Next, the filter management unit (112) determines that the ith exchange cycle (tai) of the first filter (23a) to be processed corresponds to the nth exchange cycle (tan) to be finally processed. It is determined whether or not. That is, the filter management unit (112), n-number of replacement cycle of the first filter (23a) (ta1, ta2, ..., tan) to the corresponding n pieces of total cost of ownership (TCO _1, TCO _2, ..., It is determined whether the derivation of TCO _n ) is completed. If the i-th exchange period (tai) of the first filter (23a) does not correspond to the n-th exchange period (tan), the process proceeds to step (S104). If not, the step (S105) Go to

<Step (S104)>
If the ith exchange cycle (tai) of the first filter (23a) to be processed does not fall under the nth exchange cycle (tan) to be processed finally, the filter management section (112) The next exchange cycle (i + 1th exchange cycle) of the i-th exchange cycle (tai) among n exchange cycles (ta1, ta2,..., Tan) which become candidates for the recommended exchange cycle of the 1 filter (23a) ) Is selected for processing. As a result, the (i + 1) th switching cycle is selected as the process target (i-th switching cycle (tai)). Next, the process proceeds to step (S102).

<Step (S105)>
On the other hand, if the ith exchange cycle (tai) of the first filter (23a) to be processed corresponds to the nth exchange cycle (tan) to be processed last, as shown in FIG. Derivation of _n total possessed costs (TCO ₁ , TCO ₂ ,..., TCO _n ) respectively corresponding to n exchange cycles (ta1, ta2,..., Tan) of the first filter (23a) is completed . Then, the filter management unit (112) detects the total cost of ownership lower than the comparison target cost out of the n total cost of ownership (TCO ₁ , TCO ₂ ,..., TCO _n ) derived, and The first filter (23a) corresponding to the detected total cost of ownership (total cost of ownership lower than the comparison target cost) among the n replacement cycles (ta1, ta2, ..., tan) of the filter (23a) The exchange cycle is detected, and the recommended exchange condition information indicating the detected exchange cycle of the first filter (23a) as the recommended exchange cycle of the first filter (23a) is derived (generated).

[Specific example of recommended exchange condition information]
FIG. 11 shows n total cost of ownerships corresponding to n total cost of ownerships (t 1, ta 2,..., Tan of the first filter (23 a)) derived in the first derivation operation. The distribution of (TCO ₁ , TCO ₂ ,..., TCO _n )) is illustrated.

In the example of FIG. 11, n = 31, and the type of the first filter (23a) determined in advance is the first type (Ta1) of the first filter (23a), and the first filter (23a) The 31 exchange periods (ta1, ta2,..., Ta31) are set as candidates for the recommended exchange period. Then, 31 total costs of ownership (TCO ₁ , TCO ₂ ,..., TCO ₃₁ ) corresponding to the 31 replacement cycles (ta1, ta2,..., Ta31) of the first filter (23a) are derived. There is.

Also, in this example, the first type (Ta1) of the first filter (23a) is set to "type 1", and the filter life corresponding to the first type (Ta1) of the first filter (23a) (La1) is set to "4 years", and the cost determination period (U) and the first replacement cycle (ta1) of the first filter (23a) are the filter life (La1) (La1) of the first filter (23a) That is, "four years" is set, and the sixteenth exchange period (ta16) of the first filter (23a) is set to "2.5 years".

Also, in this example, the comparison target cost (the cost determined as the comparison target) is the first total cost of ownership (TCO ₁ ) corresponding to the first exchange period (ta1) of the first filter (23a). It is set to. Specifically, in this example, the comparison target type (type determined as the comparison target) of the first filter (23a) is the first type (Ta1) of the first filter (23a) (ie, type 1). And the comparison target exchange period (the exchange period determined as the comparison target) of the first filter (23a) is set to the filter life (La1) (i.e., 4 years) of the first filter (23a). That is, in this example, the comparison target type of the first filter (23a) is the same as the type of the first filter (23a) determined in advance, and the comparison target exchange period of the first filter (23a) is the first It is identical to the first exchange period (ta1) of the filter (23a). Then, the comparison target cost is the type of the first filter (23a) installed in the air processing unit (20) as the comparison target type (ie, type 1), and the first filter (23a) in the cost determination period (U) It corresponds to the total cost of ownership required to replace in the comparable replacement cycle (ie 4 years).

Also, in this example, the 24th from the second to the twenty-fifth corresponding to the twenty-fourth from the second to the twenty-fifth twenty-fourth exchange periods (ta2, ..., ta25) of the first filter (23a) The total cost of ownership (TCO ₂ , ..., TCO ₂₅ ) is lower than the _first total cost of ownership (TCO ₁ ) corresponding to the first replacement period (ta1) of the first filter (23a) . Also, the 16th total cost of ownership (TCO ₁₆ ) is the lowest among the 24 total cost of ownership (TCO ₂ ,..., TCO ₂₅ ) from the second to the 25th. Specifically, the first total cost of ownership (TCO ₁ ) is “1300 $”, and the 24 total cost of ownership (TCO ₂ ,..., TCO ₂₅ ) from the second to the 25th are “ Below the 1300 $ ”, the 16th total cost of ownership (TCO ₁₆ ) is“ 1232 $ ”.

Thus, in this example, the filter management unit (112) detects one total cost of ownership out of the 24 total cost of ownership (TCO ₂ ,..., TCO ₂₅ ) from the second to the 25th. Specifically, in this example, the filter management unit (112) is the 16th total owned from the 24th total cost of ownership (TCO ₂ , ..., TCO ₂₅ ) from the second to the _25th. Detect the cost (TCO ₁₆ ) (ie the lowest total cost of ownership).

[Output of filter exchange support information]
FIG. 12 exemplifies filter replacement support information output by the control unit (105) (specifically, the filter management unit (112)). The example of FIG. 12 corresponds to the example of FIG.

As shown in FIG. 12, in this example, the filter replacement support information includes recommended replacement condition information. The recommended exchange condition information includes information indicating a recommended exchange cycle which is a recommended exchange cycle of the first filter (23a). In addition to the information indicating the recommended exchange cycle, the recommended exchange condition information includes information indicating the type of the first filter (23a) determined in advance and information indicating the total cost of ownership corresponding to the recommended exchange cycle. It contains. In the example of FIG. 12, the recommended exchange cycle is the 16th exchange cycle (ie 2.5 years) of the first filter (23a), and the type of the first filter (23a) determined in advance is the first The first type (Ta1) of the filter (23a) (ie type 1) and the total cost of ownership corresponding to the recommended replacement period is the 16th total cost of ownership (TCO ₁₆ ) of the first filter (23a) (Ie 1232 $). The information indicating the total cost of ownership (the total cost of ownership corresponding to the recommended replacement cycle) included in the recommended replacement condition information includes the cost required to replace the filter (23) and the cost required to drive the fan (22). It is an example of the information regarding the total cost of ownership.

Also, in this example, the filter replacement support information includes comparison and replacement condition information in addition to the recommended replacement condition information. The comparison and exchange condition information includes information indicating a comparison target cost that is a cost determined as a comparison target, and information indicating a comparison target type that is a type of the first filter (23a) determined as a comparison target, as comparison targets. And information indicating a comparison target exchange cycle which is a defined exchange cycle of the first filter (23a). In the example of FIG. 12, the comparison target cost is the first total cost of ownership (TCO ₁ ) (ie, 1300 $) of the first filter (23a), and the comparison target type is the first one of the first filter (23a) The first type (Ta1) (i.e., type 1), and the replacement cycle to be compared is the filter life (La1) (i.e., 4 years) of the first filter (23a).

Furthermore, in this example, the filter replacement support information includes the determination period information (not shown in FIG. 11) indicating the cost determination period (U) and the total owned cost shown in the recommended replacement condition information in the comparison replacement condition information. It includes cost explanation information (not shown in FIG. 11) for explaining the fact that it is lower than the indicated comparison cost.

Then, in this example, the filter management unit (112) outputs, to the display unit (103), filter replacement support information including recommended replacement condition information, comparison replacement condition information, determination period information, and cost explanation information. As shown in FIG. 13, the display unit (103) displays filter replacement support information including recommended replacement condition information, comparison replacement condition information, determination period information, and cost explanation information. In the example of FIG. 13, the cost judgment period (U) indicated in the judgment period information is “4 years”, and the cost explanation information indicates that the total cost of ownership indicated in the recommended exchange condition information is indicated in the comparison exchange condition information. The explanatory text is shown to explain that the cost is lower than the comparison cost.

[Second derivation operation]
Next, the second derivation operation (operation for deriving recommended replacement condition information) by the filter management unit (112) will be described with reference to FIG. In the second derivation operation, the filter management unit (112) becomes a candidate for a predetermined cost determination period (U), a predetermined replacement period of the filter (23), and a recommended type of the filter (23). A plurality of total cost of ownership (cost determination period) corresponding to the types of the plurality of filters (23) based on the first information (51) and the second information (52) according to the types of the plurality of filters (23) Deduce the total cost of ownership within (U). Then, the filter management unit (112) determines, based on the derived plurality of total cost of ownership, among the types of the plurality of filters (23) which are candidates for the recommended type of the filter (23), more than the comparison target cost. The type of the filter (23) corresponding to the low total cost of ownership is detected, and the recommended exchange condition information indicating the type of the detected filter (23) as the recommended type of the filter (23) is derived (generated).

In the following, the first filter (23a) is targeted for processing, the exchange cycle of the first filter (23a) is set to one predetermined exchange cycle, and it becomes a candidate for the recommended type of the first filter (23a) Description will be made by taking as an example a case where p types (Ta1, Ta2,..., Tap) of the first filter (23a) are set, and recommended replacement condition information indicating the recommended type of the first filter (23a) is derived. .

In the following example, the cost determination period (U) is indicated by p filter life information (90) corresponding to the p types (Ta1, Ta2,..., Tap) of the first filter (23a). Among the p filter lifetimes (La1, La2, ..., Lap), the longest filter lifetime is set. The length of the replacement cycle of the first filter (23a) determined in advance is equal to or less than the cost determination period (U).

[Step (S201)]
First, the filter management unit (112) processes the first type (Ta1) of p types (Ta1, Ta2,..., Tap) as candidates for the recommended type of the first filter (23a). Choose as. As a result, the first type (Ta1) of the first filter (23a) is selected as the processing target (xth type (Tax)). In addition, x is an integer of 1 or more and p or less.

[Step (S202)]
Next, the filter management unit (112) determines a predetermined cost determination period (U), a predetermined replacement period of the first filter (23a), and the x-th type of the first filter (23a). Based on the first information (51) and the second information (52) corresponding to (Tax), the total cost of ownership corresponding to the x-th type (Tax) of the first filter (23a) (cost determination period (Tax) U) derive the total cost of ownership (TCO _x )) within

In this example, the information acquisition unit (111) includes fan drive information (80) and p filter life information (p) corresponding to p types (Ta1, Ta2,..., Tap) of the first filter (23a). The longest filter life among the p filter lives (La1, La2,..., Lap) shown in 90) is acquired. The information acquisition unit (111) further includes an x-th filter cost information (60) and an x-th pressure loss related information (71) corresponding to the x-th type (Tax) of the first filter (23a). To get

The filter management unit (112) calculates the supply air volume (Q), the fan efficiency (η) and the power consumption coefficient (α) indicated in the fan drive information (80) according to “Q”, “η” and “α The filter life (the longest filter life among the p filter lives (La1, La2,..., Lap)) obtained by the information acquisition unit (111) is substituted for “U” in

Equations

1 and 2 Assign to In addition, the filter management unit (112) substitutes the filter cost (Cax) indicated in the x-th filter cost information (60) into "C" of Expression 1, and the x-th pressure loss related information (71 Substituting the pressure loss function (F _{ax (t)} ) shown in) into "F _(t) " of equation 2. In addition, the filter management unit (112) substitutes a predetermined replacement cycle of the first filter (23a) into "t" of Equation 1 and Equation 2. Then, the filter management unit (112) substitutes Equation 2 into Equation 1. Thereby, the total cost of ownership (TCO _x ) corresponding to the x-th type (Tax) of the first filter (23a) is derived.

[Step (S203)]
Next, the filter management unit (112) determines whether the x-th type (Tax) of the first filter (23a) to be processed corresponds to the p-th type (Tap) to be finally processed. Determine if That is, the filter management unit (112), p-number of types of the first filter (23a) (Ta1, Ta2, ..., Tap) p pieces of TCO respectively corresponding to (TCO _1, TCO _2, ..., TCO _p ) It is determined whether the derivation of the data has been completed. If the x-th type (Tax) of the first filter (23a) does not correspond to the p-th type (Tap), the process proceeds to step (S204). If not, the process proceeds to step (S205) .

[Step (S204)]
If the x-th type (Tax) of the first filter (23a) to be processed does not correspond to the p-th type (Tap) to be finally processed, the filter management unit (112) selects the first filter Among the p types (Ta1, Ta2,..., Tap) which are candidates for the recommended type of (23a), the next type (x + 1st type) next to the x-th type (Tax) is selected as a processing target . As a result, the (i + 1) th type is selected as the processing target (xth type (Tax)). Next, the process proceeds to step (S202).

[Step (S205)]
On the other hand, when the x-th type (Tax) to be processed corresponds to the p-th type (Tap) to be finally processed, as shown in FIG. Derivation of _p total cost of ownership (TCO ₁ , TCO ₂ ,..., TCO _p ) corresponding to each type (Ta1, Ta2,..., Tap) has been completed. Then, the filter management unit (112) detects a total cost of ownership lower than the comparison target cost out of the derived p total cost of ownership (TCO ₁ , TCO ₂ ,..., TCO _p ). The first corresponding to the detected total cost of ownership (total cost of ownership lower than comparison cost) among p types (Ta1, Ta2,..., Tap) which are candidates for recommended types of filter (23a) The type of the filter (23a) is detected, and recommended exchange condition information indicating the type of the detected first filter (23a) as the recommended type of the first filter (23a) is derived (generated).

In the recommended exchange condition information, in addition to the information indicating the recommended type of the first filter (23a), the information indicating the predetermined exchange cycle of the first filter (23a), and the information of the first filter (23a) The information indicating the total cost of ownership corresponding to the recommended type (an example of the information on the total cost of ownership) may be included.

[Third derivation operation]
Next, the third derivation operation (operation for deriving recommended replacement condition information) by the filter management unit (112) will be described with reference to FIG. In the third derivation operation, the filter management unit (112) includes a predetermined cost determination period (U), a plurality of replacement periods which become candidates for a recommended replacement period of the filter (23), and a recommendation of the filter (23). Corresponding to a plurality of combinations of the type of filter (23) and the replacement cycle based on the first information (51) and the second information (52) according to the types of the plurality of filters (23) which are candidates for the type The total cost of ownership (total cost of ownership within the cost determination period (U)) is derived. Then, the filter management unit (112) copes with the total cost of ownership lower than the comparison target cost among the plurality of combinations of the type of the filter (23) and the replacement cycle, based on the plurality of total cost of ownership derived. Of the type of filter (23) to be detected and the combination of the replacement cycle, and the indicated combination of the type of filter (23) and the replacement cycle indicated as the combination of the recommended type of the filter (23) and the recommended replacement cycle Deriving (generating) information.

In the following, the first filter (23a) is to be processed, and p types (Ta1, Ta2,..., Tap) to be candidates for the recommended type of the first filter (23a) are set. Setting the n replacement cycles (ta1, ta2,..., Tan) to be candidates for the recommended replacement cycle of), and the recommended replacement condition information indicating the combination of the recommended type of the first filter (23a) and the recommended replacement cycle The case of derivation will be described as an example.

Also, in the following example, the cost determination period (U) corresponds to p filter lifetimes (La1, La2,...) Corresponding to the p types (Ta1, Ta2,..., Tap) of the first filter (23a). , Lap) is set to the longest filter life. The length of n exchange cycles (ta1, ta2,..., Tan) of the first filter (23a) is from the first exchange cycle (ta1) to the nth exchange cycle (tan) It is set to become shorter gradually. The length of the first exchange period (ta1) is equal to or less than the cost determination period (U).

[Step (S301)]
First, the filter management unit (112) selects the first exchange cycle (ta1) from among n exchange cycles (ta1, ta2,..., Tan) that become candidates for the recommended exchange cycle of the first filter (23a). Is selected for processing. As a result, the first exchange cycle (ta1) of the first filter (23a) is selected as the process target (i-th exchange cycle (tai)). Also, the filter management unit (112) processes the first type (Ta1) among the p types (Ta1, Ta2,..., Tap) as candidates for the recommended type of the first filter (23a). Choose as. As a result, the first type (Ta1) of the first filter (23a) is selected as the processing target (xth type (Tax)).

[Step (S302)]
Next, the filter management unit (112) determines a predetermined cost determination period (U), the ith exchange period (tai) of the first filter (23a), and the xth value of the first filter (23a). Based on the first information (51) and the second information (52) corresponding to the ith type (Tax), the ith exchange cycle (tai) of the first filter (23a) and the xth type (Tax) The total cost of ownership (total cost of ownership (TCO _ix ) within the cost determination period (U)) corresponding to the combination of Tax) is derived.

Equations

1 and 2 Assign to In addition, the filter management unit (112) substitutes the filter cost (Cax) indicated in the x-th filter cost information (60) into "C" of Expression 1, and the x-th pressure loss related information (71 Substituting the pressure loss function (F _{ax (t)} ) shown in) into "F _(t) " of equation 2. In addition, the filter management unit (112) substitutes the ith exchange period (tai) of the first filter (23a) into "t" of Equation 1 and Equation 2. Then, the filter management unit (112) substitutes Equation 2 into Equation 1. Thereby, the total cost of ownership (TCOix) corresponding to the combination of the i-th exchange period (tai) and the x-th type (Tax) of the first filter (23a) is derived.

[Step (S303)]
Next, the filter management unit (112) determines that the ith exchange cycle (tai) of the first filter (23a) to be processed corresponds to the nth exchange cycle (tan) to be finally processed. It is determined whether or not. If the i-th exchange period (tai) of the first filter (23a) does not correspond to the n-th exchange period (tan), the process proceeds to step (S304). If not, the step (S305) Go to

[Step (S304)]
If the ith exchange cycle (tai) of the first filter (23a) to be processed does not fall under the nth exchange cycle (tan) to be processed finally, the filter management section (112) The next exchange cycle (i + 1th exchange cycle) of the i-th exchange cycle (tai) among n exchange cycles (ta1, ta2,..., Tan) which become candidates for the recommended exchange cycle of the 1 filter (23a) ) Is selected for processing. As a result, the (i + 1) th exchange cycle of the first filter (23a) is selected as the process target (i-th exchange cycle (tai)). Next, the process proceeds to step (S302).

[Step (S305)]
On the other hand, when the ith exchange cycle (tai) of the first filter (23a) to be processed corresponds to the nth exchange cycle (tan) to be finally processed, the filter management section (112) It is determined whether the x-th type (Tax) of the first filter (23a) to be processed corresponds to the p-th type (Tap) to be finally processed. That is, the filter management unit (112) calculates n × p total cost of ownership (TCO ₁₁ , TCO ₂₁ ,..., TCO) respectively corresponding to the type of the first filter (23a) and n × p combinations of replacement cycles. _It is determined whether the derivation of _np ) is completed. If the x-th type (Tax) of the first filter (23a) does not correspond to the p-th type (Tap), the process proceeds to step (S306). If not, the process proceeds to step (S307) .

[Step (S306)]
If the x-th type (Tax) of the first filter (23a) to be processed does not correspond to the p-th type (Tap) to be finally processed, the filter management unit (112) selects the first filter Among the p types (Ta1, Ta2,..., Tap) which are candidates for the recommended type of (23a), the next type (x + 1st type) next to the x-th type (Tax) is selected as a processing target . As a result, the (i + 1) th type is selected as the processing target (xth type (Tax)). In addition, the filter management unit (112) is the first exchange cycle (ta1) among n exchange cycles (ta1, ta2,..., Tan) to be candidates for the recommended exchange cycle of the first filter (23a). Is selected for processing. As a result, the first exchange cycle (ta1) of the first filter (23a) is selected as the process target (i-th exchange cycle (tai)). Next, the process proceeds to step (S302).

[Step (S307)]
On the other hand, when the x-th type (Tax) of the first filter (23a) to be processed corresponds to the p-th type (Tap) to be finally processed, as shown in FIG. Derivation of n × p total cost of ownership (TCO ₁₁ , TCO ₂₁ ,..., TCO _np ) respectively corresponding to the type of filter (23a) and n × p combinations of exchange cycles has been completed. Then, the filter management unit (112) detects a total cost of ownership lower than the comparison target cost among the derived n × p total costs of ownership (TCO ₁₁ , TCO ₂₁ ,..., TCO _np ), The type of the first filter (23a) corresponding to the detected total cost of ownership (total cost of ownership lower than the comparison target cost) among the type of the first filter (23a) and the n × p combinations of replacement cycles And a combination of replacement cycles is detected, and the recommended replacement condition information indicating the combination of the type and replacement cycle of the detected first filter (23a) as the combination of the recommended type and the recommended replacement cycle of the first filter (23a) is derived (Generate)

The recommended exchange condition information includes information indicating the combination of the recommended type of the first filter (23a) and the recommended exchange cycle, and a total corresponding to the combination of the recommended type of the first filter (23a) and the recommended exchange cycle Information indicating the cost of ownership (an example of information on the total cost of ownership) may be included.

[4th derivation operation]
Next, the fourth derivation operation (operation of deriving recommended replacement condition information) by the filter management unit (112) will be described with reference to FIG. In the fourth derivation operation, the filter management unit (112) selects a plurality of candidates for a recommended type of filter (23) determined for each of a plurality of filters (23) and a predetermined cost determination period (U). First exchange (51) and second information (52) according to the type of the filter (23) and a plurality of exchanges serving as candidates for a recommended exchange cycle of the filter (23) determined for each of the plurality of filters (23) A plurality of total cost of ownership (cost determination period (C) corresponding to a plurality of combinations each corresponding to a combination of the type of filter (23) and the replacement period determined for each of the plurality of filters (23) U) derive the total cost of ownership). Then, the filter management unit (112) corresponds to the combination of the type of the filter (23) and the replacement cycle defined for each of the plurality of filters (23) based on the derived total cost of ownership derived. The combination (the combination of the type of filter (23) defined for each of the plurality of filters (23) and the replacement cycle) corresponding to the total cost of ownership lower than the comparison cost among the plurality of combinations is detected and detected. It derives (generates) recommended exchange condition information indicating the combination as a combination of the recommended type of the filter (23) and the recommended exchange cycle determined for each of the plurality of filters (23).

In the following, the first filter (23a), the second filter (23b) and the third filter (23c) are targeted for processing, and the first filter (23a) to be a candidate for the recommended type of the first filter (23a) is p Set the number of types (Ta1, Ta2,..., Tap), and set n exchange periods (ta1, ta2,..., Tan) as candidates for the recommended exchange period of the first filter (23a) Q types (Tb1, Tb2,..., Tbq) are set for the second filter (23b) which is a candidate for the recommended type of the filter (23b), and m is a candidate for the recommended replacement period of the second filter (23b) Set the number of exchange cycles (tb1, tb2, ..., tbm) and select the third filter (23c) as a candidate for the recommended type of the third filter (23c) as r types (Tc1, Tc2, ..., Tcr) And set 1 replacement cycles (tc1, tc2,..., Tcl) as candidates for the recommended replacement cycle of the third filter (23c), and select the recommended type and recommended replacement cycle of the first filter (23a). When A case of deriving the recommended replacement condition information indicating a combination of the recommended type and recommended type and recommended replacement period of the recommended replacement period and a third filter (23c) of the second filter (23b) will be described as an example. Here, m is an integer of 2 or more, and l (el) is an integer of 2 or more.

Also, in the following example, the cost determination period (U) corresponds to p filter lifetimes (La1, La2,...) Corresponding to the p types (Ta1, Ta2,..., Tap) of the first filter (23a). , Lap) and q types (Tb1, Tb2,..., Tbq) of the second filter (23b) q filter lifetimes (Lb1, Lb2,..., Lbq) and the third filter (23c) Among the r filter lives (Lc1, Lc2,..., Lcr) corresponding to the r types (Tc1, Tc2,..., Tcr), the longest filter life is set. Also, the length of n exchange cycles (ta1, ta2,..., Tan) of the first filter (23a) is from the first exchange cycle (ta1) to the nth exchange cycle (tan) The length of m exchange periods (tb1, tb2,..., Tbm) of the second filter (23b) is set so as to be gradually shorter accordingly, and the length of the mth from the first exchange period (tb1) is set. The length of l exchange cycles (tc1, tc2,..., Tcl) of the third filter (23c) is set to become gradually shorter toward the exchange cycle (tbm), and the first exchange cycle It is set to become gradually shorter from (tc1) to the l-th switching period (tcl). The length of the first exchange period (ta1) of the first filter (23a) and the length of the first exchange period (tb1) of the second filter (23b) and the first of the third filter (23c) The length of the replacement cycle (tc1) of each is equal to or less than the cost determination period (U).

[Step (S401)]
First, the filter management unit (112) selects the first exchange cycle (ta1) from among n exchange cycles (ta1, ta2,..., Tan) that become candidates for the recommended exchange cycle of the first filter (23a). Is selected for processing. As a result, the first exchange cycle (ta1) of the first filter (23a) is selected as the process target (i-th exchange cycle (tai)). Similarly to this, the filter management unit (112) selects the first exchange cycle out of m exchange cycles (tb1, tb2,..., Tbm) as candidates for the recommended exchange cycle of the second filter (23b). The first exchange cycle (tc1) among the 1 exchange cycles (tc1, tc2,..., Tcl) which are candidates for the recommended exchange cycle of the third filter (23c) by selecting (tb1) as the processing target Is selected for processing. As a result, the first exchange cycle (tb1) of the second filter (23b) and the first exchange cycle (tc1) of the third filter (23c) are processed (j-th exchange cycle (tbj) and It is selected as the kth exchange period (tck). Here, j is an integer of 1 or more and m or less, and k is an integer of 1 or more and l (el) or less.

Also, the filter management unit (112) processes the first type (Ta1) among the p types (Ta1, Ta2,..., Tap) as candidates for the recommended type of the first filter (23a). Choose as. As a result, the first type (Ta1) of the first filter (23a) is selected as the processing target (xth type (Tax)). Similarly, the filter management unit (112) is the first type (Tb1) of q types (Tb1, Tb2,..., Tbq) to be candidates for the recommended type of the second filter (23b). Is selected as the processing target, and the first type (Tc1) is selected as the processing target out of r types (Tc1, Tc2,..., Tcr) which are candidates for the recommended type of the third filter (23c) . Thereby, the first type (Tb1) of the second filter (23b) and the first type (Tc1) of the third filter (23c) are to be processed (the y-th type (Tby) and the z-th Selected as the type of (Tcz)). Note that y is an integer of 1 or more and q or less, and z is an integer of 1 or more and r or less.

[Step (S402)]
Next, the filter management unit (112) determines a predetermined cost determination period (U), the ith exchange period (tai) of the first filter (23a), and the xth value of the first filter (23a). Based on the first information (51) and the second information (52) corresponding to the ith type (Tax), the ith exchange cycle (tai) of the first filter (23a) and the xth type (Tax) The total cost of ownership (total cost of ownership (TCO _ix ) within the cost determination period (U)) corresponding to the combination of Tax) is derived.

Also, the filter management unit (112) has a predetermined cost determination period (U), the j-th exchange cycle (tbj) of the second filter (23b), and the y-th of the second filter (23b). On the basis of the first information (51) and the second information (52) corresponding to the type (Tby) of the second filter (23b), the jth exchange cycle (tbj) and the yth type (Tbj) of the second filter (23b) The total cost of ownership (total cost of ownership (TCO _jy ) within the cost determination period (U)) corresponding to the combination of.

In addition, the filter management unit (112) is configured to determine a predetermined cost determination period (U), the k-th exchange cycle (tck) of the third filter (23c), and the z-th of the third filter (23c). On the basis of the first information (51) and the second information (52) corresponding to the type (Tcz) of the third filter (23c), the kth exchange cycle (tck) of the third filter (23c) and the zth type (Tcz) The total cost of ownership (total cost of ownership (TCO _kz ) within the cost determination period (U)) corresponding to the combination of.

Then, the filter management unit (112) determines the total cost of ownership (TCO _ix ) corresponding to the combination of the ith exchange period (tai) and the xth type (Tax) of the first filter (23a), Total cost of ownership (TCO _jy ) corresponding to the combination of the jth exchange cycle (tbj) and the yth type (Tbj) of the two filters (23b) and the kth exchange of the third filter (23c) The total cost of ownership (TCO _kz ) corresponding to the combination of the period (tck) and the z-th type (Tcz) is added to obtain the ith exchange period (tai) and the x-th of the first filter (23a) The jth exchange period (tbj) and the yth kind (Tbj) of the second type (Tax) and the second filter (23b) and the kth exchange period (tck) and the third type of the third filter (23c) Total cost of ownership corresponding to the combination of the z-th type (Tcz) (total cost of ownership within the cost determination period (U) _Derive (TCO _ixjykz ));

[Step (S403)]
Next, the filter management unit (112) determines that the ith exchange cycle (tai) of the first filter (23a) to be processed corresponds to the nth exchange cycle (tan) to be finally processed. It is determined whether or not.

[Step (S404)]
If "NO" in the step (S403), the filter management unit (112) selects the i-th exchange cycle (tai, among the n exchange cycles (ta1, ta2, ..., tan) of the first filter (23a). ) Is selected as the processing target. As a result, the (i + 1) th exchange cycle of the first filter (23a) is selected as the process target (i-th exchange cycle (tai)). Next, the process proceeds to step (S402).

[Step (S405)]
On the other hand, if "YES" in the step (S403), the filter management unit (112) determines that the x-th type (Tax) of the first filter (23a) to be processed is the p-th to be finally processed It is determined whether it corresponds to the type (Tap) of.

[Step (S406)]
If "NO" in the step (S405), the filter management unit (112) determines that the x-th type (Tax) of the p types (Ta1, Ta2,..., Tap) of the first filter (23a). The next type (x + 1st type) is selected as the processing target. As a result, the (x + 1) th type is selected as the processing target (xth type (Tax)). In addition, the first exchange cycle (ta1) among the n exchange cycles (ta1, ta2, ..., tan) of the first filter (23a) is set as the processing target (i-th exchange cycle (tai)) It is selected. Next, the process proceeds to step (S402).

[Step (S407)]
On the other hand, if "YES" in the step (S405), the filter management unit (112) determines that the j-th exchange cycle (tbj) of the second filter (23b) to be processed is finally the process target It is determined whether the second exchange cycle (tbm) applies.

[Step (S408)]
If "NO" in the step (S407), the filter management unit (112) selects the j-th exchange period (tbj) of m exchange periods (tb1, tb2, ..., tbm) of the second filter (23b). ) Is selected as the processing target. Thereby, the (j + 1) th switching cycle of the second filter (23b) is selected as the processing target (j-th switching cycle (tbj)). In addition, the first exchange cycle (ta1) among the n exchange cycles (ta1, ta2, ..., tan) of the first filter (23a) is set as the processing target (i-th exchange cycle (tai)) It is selected. In addition, the first type (Ta1) is selected as the processing target (the x-th type (Tax)) from the p types (Ta1, Ta2, ..., Tap) of the first filter (23a) . Next, the process proceeds to step (S402).

[Step (S409)]
On the other hand, if “YES” in the step (S407), the filter management unit (112) determines that the y-th type (Tby) of the second filter (23b) to be processed is finally processed It is determined whether it corresponds to the second type (Tbq).

[Step (S410)]
In the case of “NO” in the step (S409), the filter management section (112) makes the y-th type (Tby) of the q types (Tb1, Tb2,..., Tbq) of the second filter (23b). The next type (y + 1 type) is selected as the processing target. As a result, the (y + 1) th type of the second filter (23b) is selected as the processing target (yth type (Tby)). In addition, the first exchange cycle (ta1) among the n exchange cycles (ta1, ta2, ..., tan) of the first filter (23a) is set as the processing target (i-th exchange cycle (tai)) The first exchange cycle (tb1) is selected for processing among the m exchange cycles (tb1, tb2,..., Tbm) of the second filter (23b) (jth exchange cycle (tbj)) Selected as In addition, the first type (Ta1) is selected as the processing target (the x-th type (Tax)) from the p types (Ta1, Ta2, ..., Tap) of the first filter (23a) . Next, the process proceeds to step (S402).

[Step (S411)]
On the other hand, if "YES" in the step (S409), the filter management unit (112) determines whether the kth replacement cycle (tck) of the third filter (23c) to be processed is finally processed. It is determined whether or not the second exchange cycle (tcl) applies.

[Step (S412)]
If "NO" in the step (S411), the filter management unit (112) selects the k-th replacement period (tck) of the 1 replacement periods (tc1, tc2, ..., tcl) of the third filter (23c). ) Is selected as the process target. As a result, the (k + 1) th exchange cycle of the third filter (23c) is selected as the process target (kth exchange cycle (tck)). In addition, the first exchange cycle (ta1) among the n exchange cycles (ta1, ta2, ..., tan) of the first filter (23a) is set as the processing target (i-th exchange cycle (tai)) The first exchange cycle (tb1) is selected for processing among the m exchange cycles (tb1, tb2,..., Tbm) of the second filter (23b) (jth exchange cycle (tbj)) Selected as Further, the first type (Ta1) is selected as the processing target (the x-th type (Tax)) from the p types (Ta1, Ta2,..., Tap) of the first filter (23a), Among the q types (Tb1, Tb2,..., Tbq) of the second filter (23b), the first type (Tb1) is selected as the processing target (y-th type (Tby)). Next, the process proceeds to step (S402).

[Step (S413)]
On the other hand, if "YES" in the step (S411), the filter management unit (112) determines that the z-th type (Tcz) of the third filter (23c) to be processed is the r-th to be finally processed It is determined whether or not it corresponds to the type (Tcr) of That is, the filter management unit (112) is a combination of the type and replacement cycle of the first filter (23a), the type and replacement cycle of the second filter (23b), and the type and replacement cycle of the third filter (23c). Derivation of total cost of ownership (TCO ₁₁₁₁₁₁ , ..., TCO _npmqlr ) corresponding to n × p × m × q × l × r combinations corresponding to It is determined whether it has been done.

[Step (S414)]
If "NO" in the step (S413), the filter management unit (112) determines that the z-th type (Tcz) of the r types (Tc1, Tc2, ..., Tcr) of the third filter (23c). The next type (the z + 1st type) is selected as a processing target. As a result, the z + 1st type of the third filter (23c) is selected as a processing target (zth type (Tcz)). In addition, the first exchange cycle (ta1) among the n exchange cycles (ta1, ta2, ..., tan) of the first filter (23a) is set as the processing target (i-th exchange cycle (tai)) The first exchange cycle (tb1) is selected for processing among the m exchange cycles (tb1, tb2,..., Tbm) of the second filter (23b) (jth exchange cycle (tbj)) And the first exchange cycle (tc1) among the 1 exchange cycles (tc1, tc2,..., Tcl) of the third filter (23c) is to be processed (k th exchange cycle (tck) Is selected as Further, the first type (Ta1) is selected as the processing target (the x-th type (Tax)) from the p types (Ta1, Ta2,..., Tap) of the first filter (23a), Among the q types (Tb1, Tb2,..., Tbq) of the second filter (23b), the first type (Tb1) is selected as the processing target (y-th type (Tby)). Next, the process proceeds to step (S402).

[Step (S415)]
On the other hand, if "YES" in the step (S413), as shown in FIG. 19, the type and replacement cycle of the first filter (23a), the type and replacement cycle of the second filter (23b), and the third filter 23c) n × p × m × q × l × r combinations corresponding to the combination with the type and exchange period of each total cost of ownership n × p × m × q × l × r units (TCO _111111) , ..., TCO _npmqlr ) has been derived. Then, the filter management unit (112) determines the total ownership cost lower than the comparison target cost among the derived n × p × m × q × l × r total cost of ownership (TCO ₁₁₁₁₁₁ , ..., TCO _npmqlr ) The cost is detected, each of which is equivalent to the combination of the type and exchange cycle of the first filter (23a), the type of the second filter (23b), the exchange cycle and the type of the third filter (23c) and exchange cycle Among the combinations of p × m × q × 1 × r, the type and exchange cycle of the first filter (23a) corresponding to the detected total cost of ownership (total cost of ownership lower than the comparison target cost) among the combinations The type of the second filter (23b) and the replacement cycle, and the combination of the type of the third filter (23c) and the replacement cycle) are detected, and the detected combination is used as the recommended type and the recommended replacement cycle of the first filter (23a) And recommended type of second filter (23b) Deriving a recommended replacement condition information indicating a combination of the recommended type and recommended replacement cycle of the fine recommended replacement period and a third filter (23c).

The recommended exchange condition information is determined for each of a plurality of filters (23) in addition to information indicating the combination of a recommended type of a filter (23) determined for each of a plurality of filters (23) and a recommended exchange cycle. Information indicating the total cost of ownership corresponding to the combination of the recommended type of the filter (23) and the recommended replacement cycle may be included (an example of information on the total cost of ownership).

[Effect by Embodiment 1]
As described above, by outputting filter replacement support information based on the cost required to replace the filter (23) and the cost required to drive the fan (22), the cost required to replace the filter (23) and the fan (22) The replacement of the filter (23) can be supported in consideration of the total cost of ownership, including the cost required to drive the This makes it possible to replace the filter (23) taking into account the total cost of ownership.

Also, in this example, the filter replacement support information includes information on the total cost of ownership including the cost required to replace the filter (23) and the cost required to drive the fan (22). By outputting the filter replacement support information including the information on the total cost of ownership, it is possible to facilitate the support of replacement of the filter (23) in consideration of the total cost of ownership.

Further, in this example, the filter replacement support information indicates at least one of the recommended type and the recommended replacement period of the filter (23) corresponding to the total cost of ownership lower than the comparison target cost (the cost determined as the comparison target). Contains recommended exchange condition information. By outputting the filter replacement support information including such recommended replacement condition information, it is possible to support the replacement of the filter (23) such that the total cost of ownership is smaller than the comparison target cost.

Moreover, in this example, the type of filter (23) installed in the air processing unit (20) is the recommended type, and the total amount required when replacing the filter (23) in the recommended replacement cycle within the cost determination period (U) The cost of ownership is lower than the cost to be compared. Therefore, it is possible to support the replacement of the filter (23) so that the total cost of ownership in the cost determination period (U) is smaller than the comparison target cost.

Moreover, in this example, the comparison target cost sets the type of the filter (23) installed in the air processing unit (20) as the comparison target type (type determined as the comparison target) and within the cost determination period (U) This corresponds to the total cost of ownership required when replacing the filter (23) in the comparison target cycle (the replacement cycle determined as the comparison target). Therefore, it is possible to support replacement of the filter (23) such that the total cost of ownership in the cost determination period (U) is smaller than the comparison target cost in the cost determination period (U).

(Modification of Embodiment 1)
The filter management unit (112) may be configured to perform the fifth derivation operation. In the fifth derivation operation, the filter management unit (112) responds to the predetermined cost determination period (U) and the type (one type) of the filter (23) determined for each of the plurality of filters (23). Based on the first information (51) and the second information (52), and a plurality of replacement cycles as candidates for the recommended replacement cycle of the filter (23) determined for each of the plurality of filters (23). Derivation of a plurality of total cost of ownership (total cost of ownership within the cost determination period (U)) respectively corresponding to a plurality of combinations corresponding to a combination of replacement cycles of the filters (23) defined for each of the plurality of filters (23) Do. Then, the filter management unit (112) determines a plurality of combinations of replacement cycles of the filters (23) determined for each of the plurality of filters (23) based on the derived total cost of ownership. Among the combinations, the combination corresponding to the total cost of ownership lower than the comparison target cost (combination of the replacement cycles of the filters (23) defined for each of the plurality of filters (23)) is detected, and the detected combinations are plural The recommended exchange condition information shown as a combination of the recommended exchange cycle of the filter (23) which is desired to be determined for each filter (23) is derived (generated). This fifth derivation operation can be realized, for example, by omitting the steps (S403, S404, S407, S408, S411, S412) from the fourth derivation operation shown in FIG.

The filter management unit (112) may be configured to perform the sixth derivation operation. In the sixth derivation operation, the filter management unit (112) includes a predetermined cost determination period (U) and a replacement period (one replacement period) of the filter (23) determined for each of the plurality of filters (23). And first information (51) and second information (52) corresponding to the types of the plurality of filters (23) which are candidates for the recommended type of the filter (23) determined for each of the plurality of filters (23). On the basis of a plurality of total possessed costs (total possessed within the cost determination period (U) respectively corresponding to a plurality of combinations respectively corresponding to a combination of types of filters (23) defined for Derive the cost). Then, the filter management unit (112) determines a plurality of combinations each corresponding to a combination of types of filters (23) determined for each of the plurality of filters (23) based on the derived plurality of total cost of ownership. Among them, a combination (combination of types of filters (23) defined for each of a plurality of filters (23)) corresponding to the total cost of ownership lower than the comparison target cost is detected, and the detected combination is subjected to a plurality of filters (23) Deriving (generating) recommended exchange condition information indicated as a combination of recommended types of filters (23) defined for each of the filters. This sixth derivation operation can be realized, for example, by omitting the steps (S405, S406, S409, S410, S413, and S414) from the fourth derivation operation shown in FIG.

(Modification of clogging related information)
As shown in FIG. 20, the clogging related information (70) may include dust accumulation related information (72). The dust accumulation related information (72) is information on the tendency of the dust accumulation amount in the filter (23) to change with time. In this example, the dust accumulation related information (72) indicates a dust accumulation function (D _(t) ) corresponding to the tendency of the dust accumulation amount in the filter (23) to change with time.

The pressure loss function (F _(t) ) can be expressed as the following equation 3 using the dust accumulation function (D _(t) ).

In addition, "(beta)" of Formula 3 is a conversion factor. Further, the average pressure drop (H _(t) ) in the cost determination period (U) can be expressed as the following formula 4 using a dust accumulation function (D _(t) ).

In the example of FIG. 20, dust accumulation related information (72) (clogging related information (70)) is set for each type (T) of the filter (23). Specifically, p dust accumulation functions (D _{a1 (t)} , D _{a2 (t)} ,..., D corresponding to the p kinds (Ta1, Ta2,..., Tap) of the first filter (23 a) p dust accumulation related information (72) respectively indicating _{ap (t)} and q dust accumulation functions (tb1, Tb2, ..., Tbq) corresponding to q types of the second filter (23b) Q dust accumulation related information (72) indicating D _{b1 (t)} , D _{b2 (t)} , ..., D _{bq (t)} ) and r kinds (Tc1, Tc2) of the third filter (23c) , ..., Tcr) and r dust accumulation related information (72) respectively indicating r dust accumulation functions (D _{c1 (t)} , D _{c2 (t)} , ..., D _{cr (t)} ) It is set.

As described above, the dust accumulation function indicated in the dust accumulation related information (72) (that is, the temporal change of dust accumulation amount in the filter (23)) is correlated with the temporal change of the degree of clogging in the filter (23) . The temporal change in the degree of clogging in the filter (23) is correlated with the cost required to drive the fan (22). Specifically, as the dust accumulation amount in the filter (23) increases, the degree of clogging in the filter (23) tends to increase. Then, as the degree of clogging in the filter (23) increases, the pressure loss in the filter (23) increases, and as a result, the power consumption of the fan (22) increases, and the cost required to drive the fan (22) Tend to be higher. Therefore, the cost required to drive the fan (22) can be derived based on the dust accumulation related information (72). That is, the filter management unit (112) may be configured to derive the total cost of ownership (TCO) in the cost determination period (U) based on Equation 1 and Equation 4.

The clogging related information (70) may include both the pressure loss related information (71) and the dust accumulation related information (72), or the pressure loss related information (71) and the dust accumulation related information One of (72) may be included.

(Modification of second information)
The second information (52) may include power consumption related information (75) illustrated in FIG. The power consumption related information (75) is information regarding the tendency of the power consumption of the fan (22) to change with time in accordance with the tendency of the pressure loss of the filter (23) to change with time. In this example, the power consumption related information (75) corresponds to the power consumption function (W _{(t (t (t} )) corresponding to the tendency of the power consumption of the fan (22) with time in accordance with the tendency of the pressure loss of the filter (23) with time. ₎ Is shown.

The total cost of ownership (TCO) in the cost determination period (U) can be expressed as the following equation 5 using the power consumption function (W _(t) ).

Also, the power consumption function (W _(t) ) can be expressed as the following equation 6 using the pressure loss function (F _(t) ).

In the example of FIG. 21, the power consumption related information (75) is set for each type (T) of the filter (23). Specifically, p power consumption functions (W _{a1 (t)} , W _{a2 (t)} ,..., W corresponding to the p kinds (Ta 1, Ta 2,..., Tap) of the first filter (23 a) p power consumption related information (75) respectively indicating _{ap (t)} and q power consumption functions (tb1, Tb2, ..., Tbq) corresponding to q types of the second filter (23b) Q power consumption related information (75) indicating W _{b1 (t)} , W _{b2 (t)} , ..., W _{bq (t)} ), and r types (Tc1, Tc2) of the third filter (23c) ,..., Tcr) and r power consumption related information (75) respectively indicating the power consumption functions (W _{c1 (t)} , W _{c2 (t)} ,..., W _{cr (t)} ) corresponding to It is set.

As described above, the power consumption function (W _(t) ) indicated in the power consumption related information (75) (that is, the change with time of the power consumption of the fan (22)) is the cost required to drive the fan (22) There is a correlation. Specifically, as the pressure loss in the filter (23) increases, the power consumption of the fan (22) increases, and as a result, the cost required to drive the fan (22) tends to increase. Therefore, the cost required to drive the fan (22) can be derived based on the power consumption related information (75). That is, the filter management unit (112) may be configured to derive the total cost of ownership (TCO) in the cost determination period (U) based on Equation 5 and Equation 6.

The second information (52) may include both the clogging related information (70) and the power consumption related information (75), or the clogging related information (70) and the power consumption related information ( 75) may be included.

Second Embodiment
FIG. 22 illustrates the configuration of the management system (10) according to the second embodiment. In the second embodiment, a plurality of air treatment units (20) are provided. The configuration of the plurality of air treatment units (20) is the same as the configuration of the air treatment unit (20) shown in FIG. That is, each of the plurality of air processing units (20) has a fan (22) provided in the air passage (21) and one or more (three in this example) filters (23).

In the second embodiment, the management system (10) is configured to manage the filters (23) of the plurality of air treatment units (20). In this example, three air treatment units (20) are provided in one building. That is, in this example, the management system (10) is configured to manage the filters (23) of a plurality of air treatment units (20) provided in one building.

The management system (10) according to the second embodiment has the same configuration as the management system (10) according to the first embodiment shown in FIG. That is, in this example, the management system (10) includes a storage device (100) and a management device (101).

In the second embodiment, the information acquiring unit (111) is used to derive the cost required to replace the filter (23) provided in any one of the plurality of air processing units (20). In order to obtain the first information (51) that can be used and the second information (52) that can be used for deriving the cost required to drive the fan (22) provided in the air processing unit (20) It is configured.

In the second embodiment, the filter management unit (112) outputs the filter exchange support information based on the first information (51) and the second information (52) acquired by the information acquisition unit (111). Is configured. The filter replacement support information is included in the air processing unit (20) corresponding to the first information (51) and the second information (52) acquired by the information acquiring unit (111) among the plurality of air processing units (20). It is information for supporting replacement of the filter (23), and is information based on the cost required to replace the filter (23) and the cost required to drive the fan (22).

The management operation by the management system (10) according to the second embodiment (the operation of managing the filter (23) of any one air treatment unit (20) among the plurality of air treatment units (20)) is the first embodiment. Is the same as the management operation by the management system (10). Further, the derivation operation by the filter management unit (112) in the second embodiment (the operation of deriving the recommended replacement condition information regarding the filter (23) of any one air processing unit (20) among the plurality of air processing units (20) ) Is also similar to the derivation operation by the filter management unit (112) in the first embodiment. That is, in the second embodiment, as in the first embodiment, the filter replacement support information corresponds to the air handling unit (20) corresponding to the filter replacement support information among the plurality of air handling units (20) (specifically, information For the cost required to replace the filter (23) in the air processing unit (20) corresponding to the first information (51) and the second information (52) acquired by the acquisition unit (111) and for driving the fan (22) It may include information on the total cost of ownership, including costs involved. Further, as in the first embodiment, the filter replacement support information is a recommended type and a recommended replacement of the filter (23) of the air processing unit (20) corresponding to the filter replacement support information among the plurality of air processing units (20). The recommended exchange condition information indicating at least one of the cycles may be included. Further, as in the first embodiment, the filter replacement support information may include comparison replacement condition information, inversion period information, cost explanation information, and the like.

Further, in the second embodiment, the filter management unit (112) performs the recommended period exchange based on the plurality of first information (51) and the second information (52) respectively associated with the plurality of air processing units (20). It is configured to output information. The recommended simultaneous exchange information is information indicating a simultaneous exchange cycle for replacing the filters (23) of the plurality of air processing units (20) in the same period, and the cost required to replace the filter (23) It is information based on the cost required to drive the fan (22).

For example, the filter management unit (112) corresponds to the filters (23) of the plurality of air treatment units (20) by performing the derivation operation for each filter (23) of the plurality of air treatment units (20). And, a plurality of recommended replacement condition information indicating the recommended replacement period of the filter (23) of the corresponding air processing unit (20) is derived. Then, the filter management unit (112) obtains a simultaneous exchange cycle (for example, an average value of a plurality of recommended exchange cycles) based on the plurality of recommended exchange cycles respectively indicated in the plurality of derived recommended exchange condition information , Deriving recommended simultaneous exchange information indicating the obtained simultaneous exchange cycle. The recommended same-period exchange information may be included in the filter exchange support information.

In the second embodiment, the filter management unit (112) is configured to convert the filter replacement support information related to any one of the plurality of air processing units (20) into a plurality of air processing units 20) is configured to output as filter replacement support information related to another air treatment unit (20) different from the air treatment unit (20).

[Effect by Embodiment 2]
As described above, by outputting filter replacement support information based on the cost required to replace the filter (23) and the cost required to drive the fan (22), the cost required to replace the filter (23) and the fan (22) The replacement of the filter (23) can be supported in consideration of the total cost of ownership, including the cost required to drive the

In addition, by outputting recommended simultaneous exchange information based on the cost required to replace the filter (23) and the cost required to drive the fan (22), the same period of the plurality of filters (23) considering the total cost of ownership It can support exchange.

In addition, filter replacement support information related to any one air processing unit (20) of the plurality of air processing units (20) is the same as the air processing unit (20) of the plurality of air processing units (20) The filter replacement support information related to any one of the plurality of air processing units (20) is output by outputting it as filter replacement support information related to another different air processing unit (20). The plurality of air treatment units (20) can be used to support replacement of the filter (23) in another air treatment unit (20) different from the air treatment unit (20).

(Modification of Embodiment 2)
As shown in FIG. 23, a plurality of management systems (10) are provided via a communication network (40) and a plurality of communication terminals (41) respectively provided in a plurality (2 in this example) of buildings. The filters (23) of one or more (three in this example) air treatment units (20) provided in each of the buildings of (1) may be configured to manage.

In the example of FIG. 23, a management apparatus (101) and a plurality of communication terminals (41) are connected to a communication network (40). Moreover, the management apparatus (101) (specifically, the control unit (105)) and the plurality of communication terminals (41) can communicate with each other. For example, the communication terminal (41) has the same configuration as the management device (101). Further, in the example of FIG. 23, the filter management unit (112) is configured to be able to output filter exchange support information to the communication terminal (41) via the communication network (40).

(Other embodiments)
In the above description, it is assumed that the filter replacement support information includes information on the total cost of ownership (the total cost of ownership including the cost of replacing the filter (23) and the cost of driving the fan (22)). Although listed, the present invention is not limited to this, and the filter replacement support information may include information on the cost required to replace the filter (23) and information on the cost required to drive the fan (22). For example, the filter management unit (112) may include information on the cost required to replace the filter (23) in the cost determination period (U) and information on the cost required to drive the fan (22) in the cost determination period (U). Information on the cost required to replace the filter (23) in the cost determination period (U) and driving of the fan (22) in the cost determination period (U). The information related to the cost required for the display may be displayed individually on the display unit (103).

Further, the output timing of the filter replacement support information may be a timing according to the operation (operation for requesting the output of the filter replacement support information) by the operator given to the operation unit (102), or the like It may be any timing of For example, when an operation by the operator (an operation for requesting output of filter replacement support information) is given to the operation unit (102), the filter management unit (112) responds to the operation and supports filter replacement. It may be configured to output information. In addition, the filter management unit (112), filter replacement support information when the period corresponding to the recommended replacement period of the filter (23) has passed since the day the filter (23) was replaced in the air processing unit (20) May be configured to output the

Further, in the above description, the case where the cost determination period (U) is set to the filter life (L) is taken as an example, but not limited to this, the cost determination period (U) has another length of time It may be set to For example, the cost determination period (U) is set to the maintenance inspection cycle (period of maintenance inspection periodically performed on the air processing unit (20)) defined for the air processing unit (20). It is also good.

The pressure loss related information (71) is the differential pressure of the filter (23) detected by the differential pressure sensor (32) while the fan (22) is driven (the pressure difference between the upstream side and the downstream side of the air flow) It may be derived based on temporal change within a predetermined period of time. For example, the filter management unit (112) monitors the differential pressure of the filter (23) detected by the differential pressure sensor (32) while driving the fan (22), and the differential pressure of the detected filter (23) Of the pressure drop in the filter (23) based on the temporal change in the predetermined period of time, and the pressure loss related information on the trend of the pressure drop in the estimated filter (23) (71) ) (Specifically, it may be configured to derive a pressure loss function (F _(t) ) corresponding to the tendency of pressure loss in the filter (23) to change with time).

Also, the dust accumulation related information (72) may be derived based on the dust concentration of the surrounding environment. For example, the filter management unit (112) may detect dust concentration detected by a dust densitometer (not shown) or dust concentration (for example, PM 2.5 concentration) indicated in meteorological information and dust deposition in the filter (23). Dust accumulation related information regarding the tendency of dust accumulation amount over time in the estimated filter (23) is estimated by estimating the tendency of dust accumulation amount over time in the filter (23) based on efficiency and supply air volume (Q) (72) It may be configured to derive a dust deposition function (D _(t) ) corresponding to the tendency of the dust deposition amount in the filter (23) to change with time.

Further, the power consumption related information (75) may be derived based on a temporal change in the power consumption of the fan (22) within a predetermined period. For example, the filter management unit (112) monitors the power consumption of the fan (22) and changes the power consumption of the fan (22) with time based on the temporal change in the power consumption of the fan (22) within a predetermined period. Power consumption related information (75) regarding the tendency of the power consumption of the estimated fan (22) over time, specifically corresponding to the power consumption of the fan (22) It may be configured to derive the power function (W _(t) ).

Also, the above embodiments may be implemented in combination as appropriate. The above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, the applications thereof, or the applications thereof.

As described above, the present disclosure is useful as a technique for managing a filter of an air treatment unit.

10 management system 100 storage device 101 management unit 102 operation unit 103 display unit 104 storage unit 105 control unit 111 information acquisition unit 112 filter management unit 20 air processing unit 21 air passage unit 22 fan 23 filter 23a first filter 23b second filter 23c 3 filter 31 flow sensor 32 differential pressure sensor 51 first information 52 second information 60 filter cost information 70 clogging related information 71 pressure loss related information 72 dust accumulation related information 75 power consumption related information 80 fan drive information 90 filter life information

Claims

A system for managing a filter (23) of an air treatment unit (20) comprising a fan (22) provided in an air passage (21) and one or more filters (23),
The first information (51) that can be used to derive the cost required to replace the filter (23), and the second information (52) that can be used to derive the cost required to drive the fan (22) An information acquisition unit (111) to acquire;
Information to support the exchange of the filter (23) based on the first information (51) and the second information (52) acquired by the information acquisition unit (111), and the exchange of the filter (23) A management system characterized by comprising: a filter management unit (112) for outputting filter replacement support information based on the cost required for and the cost required for driving the fan (22).
In claim 1,
A management system characterized in that the second information (52) includes clogging related information (70) regarding a tendency of the clogging degree in the filter (23) to change with time.
In claim 2,
The management system, wherein the clogging related information (70) includes pressure loss related information (71) regarding a tendency of pressure loss over time in the filter (23).
In claim 2 or 3,
The management system, wherein the clogging related information (70) includes dust accumulation related information (72) on the tendency of dust accumulation amount in the filter (23) to change with time.
In any one of claims 1 to 4,
The management system, wherein the second information (52) includes power consumption related information (75) on a tendency of the power consumption of the fan (22) to change with time.
In any one of claims 1 to 5,
The management system, wherein the filter replacement support information includes information on the total cost of ownership including the cost required to replace the filter (23) and the cost required to drive the fan (22).
In any one of claims 1 to 6,
The total cost of ownership is the cost including the cost for replacing the filter (23) and the cost for driving the fan (22),
The filter replacement support information indicates at least one of a recommended type of the filter (23) and a recommended replacement period corresponding to a total cost of ownership lower than a comparison target cost determined as a comparison target. Management system characterized by including information.
In claim 7,
The type of the filter (23) installed in the air treatment unit (20) is the recommended type, and the filter (23) is recommended within a predetermined cost determination period (U) A management system characterized in that a total cost of ownership required when exchanging in an exchange cycle is lower than the comparison target cost.
In claim 8,
The comparison target cost refers to the type of the filter (23) installed in the air processing unit (20) as the type determined as the comparison target, and the filter (23) within the cost determination period (U). A management system characterized by corresponding to the total cost of ownership required when replacing in a replacement cycle determined as a comparison target.
A system for managing filters (23) of a plurality of air treatment units (20) each having a fan (22) and one or more filters (23) provided in an air passage (21),
First information (51) that can be used to derive the cost required to replace the filter (23) provided in any one of the plurality of air treatment units (20), and the air An information acquisition unit (111) that acquires second information (52) that can be used to derive the cost required to drive the fan (22) provided in the processing unit (20);
Of the plurality of air processing units (20) acquired by the information acquisition unit (111) based on the first information (51) and the second information (52) acquired by the information acquisition unit (111) Information for supporting replacement of the filter (23) in the air processing unit (20) corresponding to the first information (51) and the second information (52), the cost required for replacing the filter (23), and And a filter management unit (112) for outputting filter replacement support information based on the cost required to drive the fan (22).
In claim 10,
The filter management unit (112) is configured to receive the plurality of air treatment units (20) based on a plurality of first information (51) and second information (52) respectively associated with the plurality of air treatment units (20). Recommended period exchange based on the cost of replacing the filter (23) and the cost of driving the fan (22). A management system characterized by outputting information.
In claim 10 or 11,
The filter management unit (112) is configured to receive the filter replacement support information associated with any one air processing unit (20) of the plurality of air processing units (20) in the plurality of air processing units (20). A management system characterized by outputting as filter replacement support information related to another air processing unit (20) different from the air processing unit (20).
A filter (23) of an air processing unit (20) having a fan (22) and one or more filters (23) provided in the air passage (21) is stored in a storage unit (104) and a control unit (105). How to manage,
The first information (51) that can be used to derive the cost required to replace the filter (23), and the second information (52) that can be used to derive the cost required to drive the fan (22) A first step of storing in the storage unit (104);
Information for supporting the exchange of the filter (23) based on the first information (51) and the second information (52) stored in the storage unit (104), for the exchange of the filter (23) And a second step of outputting filter replacement support information based on the required cost and the cost required for driving the fan (22) by the control unit (105).