CN116209860A - Method for selecting additional ventilation device, method for selecting air conditioner, and air conditioning ventilation system - Google Patents

Abstract

The selection method of the second ventilation device (20) is to reset other ventilation devices as the second ventilation device (20) for the indoor space (SI) provided with the existing first ventilation device (10) The selected method of the second ventilator (20) during. The ventilation volume per hour of the existing first ventilation device (10) is the first ventilation volume. In the first step, the second ventilation rate is obtained from the size of the indoor space. The second ventilation volume is the ventilation volume per hour required as a countermeasure against pathogen infection. In the second step, the difference between the second ventilation amount and the first ventilation amount is obtained as the additional ventilation amount. In the third step, a ventilation device capable of performing ventilation with an additional ventilation amount is selected as a second ventilation device (20).

Description

Selection method of additional ventilator, selection of additional ventilator and air conditioner Method and air-conditioning ventilation system

technical field

The present invention relates to a selection method of an additional ventilation device, a selection method of an additional ventilation device and an air-conditioning device, and an air-conditioning ventilation system.

Background technique

Conventionally, ventilators that exhaust indoor air to the outside or supply outdoor air indoors have been widely used (for example, refer to Patent Document 1 (JP-A-2005-300112)).

Contents of the invention

The problem to be solved by the invention

Ventilation devices are installed in most of the existing buildings to perform ventilation to a certain extent.

On the other hand, recently, as one of countermeasures against infection by pathogens such as viruses and bacteria (hereinafter referred to as pathogenic infection), it is required to increase the amount of ventilation.

However, when replacing the existing ventilator, the cost of the device and the installation cost are high.

means to solve the problem

The method of selecting an additional ventilator from the first point of view is the selection of an additional ventilator when another ventilator is installed as an additional ventilator in the indoor space where the existing first ventilator is installed method. The ventilation volume per hour of the existing first ventilation device is the first ventilation volume. The method of selecting an additional ventilator according to the first viewpoint includes a first step, a second step, and a third step. In the first step, the second ventilation rate is obtained from the size of the indoor space. As the size of the indoor space, the floor area of the indoor space, the volume of the indoor space, the number of people accommodated in the indoor space, and the like can be used. The second ventilation rate is the ventilation rate per hour required as a countermeasure against pathogen infection. In the second step, the difference between the second ventilation amount and the first ventilation amount is obtained as the additional ventilation amount. In the third step, a ventilator capable of ventilating the additional amount of ventilation is selected as the additional ventilator.

Here, in accordance with the excellent idea of directly using the first ventilation volume of the existing first ventilation device and supplementing the insufficient ventilation volume (additional ventilation volume) with an additional ventilation device, Select additional ventilator. Thereby, the ventilation of the second ventilation amount required as a countermeasure against pathogenic infection can be realized while suppressing the cost.

The selection method of the additional ventilator and the air conditioner of the second viewpoint is a selection method of selecting the additional ventilator and further the air conditioner by the selection method of the first viewpoint. An air conditioner is a device that air-conditions an indoor space. The method of selecting an additional ventilator and an air conditioner according to the second viewpoint includes a fourth step and a fifth step in addition to the first step, the second step, and the third step. In the fourth step, the sum of the first air-conditioning load, the second air-conditioning load, and the third air-conditioning load is calculated as the total air-conditioning load. The first air conditioning load is determined based on the size of the indoor space. The second air-conditioning load is an air-conditioning load generated by the ventilation of the existing first ventilation device. The third air-conditioning load is the air-conditioning load generated by the ventilation of the additional ventilation device selected in the third step. In the fifth step, an air-conditioning apparatus having an air-conditioning capability capable of handling the total air-conditioning load is selected from candidates of a plurality of air-conditioning apparatuses having different air-conditioning capabilities.

In addition to the conventional first ventilator, when an additional ventilator is installed in the indoor space, it is assumed that the air-conditioning load of the indoor space increases due to the ventilation of the additional ventilator. If this is not taken into account, there is a possibility that the warm environment of the indoor space will deteriorate. In view of this, in the method of selecting an additional ventilator and an air conditioner according to the second viewpoint, an air conditioner that can be selected for the total air-conditioning load including the ventilation by the additional ventilator can be selected. Air conditioning loads are handled.

The selection method of the additional ventilator and the air conditioner of the 3rd viewpoint is based on the selection method of the 2nd viewpoint, In the 3rd step, the ventilator which has a heat exchange part is selected as an additional ventilator. The heat exchange unit performs heat exchange between external air serving as supply air to the indoor space and return air serving as exhaust air from the indoor space. In addition, in the fourth step, the third air-conditioning load is obtained in consideration of the heat exchange amount in the heat exchange unit of the selected additional ventilator.

Here, a ventilator having a heat exchange unit for exchanging heat between the supply gas and the exhaust gas is selected as the additional ventilator. Therefore, deterioration of the warm environment of the indoor space by the ventilation of the additional ventilator can be suppressed to a small extent. Furthermore, since the third air-conditioning load is obtained in consideration of the heat exchange amount in the heat exchange unit, the total air-conditioning load is not calculated excessively. Accordingly, it is possible to accurately recognize the required air-conditioning capacity of the air-conditioning apparatus, and to select an air-conditioning apparatus without excess or deficiency.

The selection method of the additional ventilator and the air conditioner of the 4th viewpoint further has the 6th step and the 7th step in addition to the selection method of the 2nd viewpoint or the 3rd viewpoint. In the sixth step, it is determined whether the air volume at the time of the maximum ventilation volume of the additional ventilator selected in the third step is 30% or less of the rated air volume of the air conditioner selected in the fifth step. In the seventh step, when it is determined in the sixth step that the air volume at the time of the maximum air exchange rate of the additional ventilator exceeds 30% of the rated air volume of the air conditioner, reconsider the selection of the additional ventilator and the air conditioner .

When the air volume at the time of the maximum ventilation volume of the additional ventilation device exceeds 30% of the rated air volume of the air conditioner, even if the total air-conditioning load can be processed by the air-conditioning capacity of the air-conditioner, the operating efficiency of the air-conditioner will deteriorate , operating costs can be high. In view of this, in the selection method of the additional ventilator and air conditioner of the fourth viewpoint, the sixth step and the seventh step are also carried out, and the selection of the additional ventilator and air conditioner is reconsidered. Thereby, for example, it is possible to select an air conditioner with a higher rated air volume and higher air conditioning capacity, thereby reducing running costs for air conditioning and ventilation.

The selection method of the additional ventilator and the air conditioner of the fifth viewpoint is based on the selection method of any one of the second viewpoint to the fourth viewpoint, and in the third step, the maximum ventilation volume is different The additional ventilator is selected from the candidates of the ventilator. In addition, the number of candidates for the plurality of air conditioners in the fifth step is greater than the number of candidates for the plurality of ventilation devices in the third step.

Here, by preparing a large number of air conditioner candidates, it is possible to select a more appropriate air conditioner according to the selected additional ventilator. Accordingly, the cost of the device and the installation cost of the device can be suppressed.

The air-conditioning and ventilation system of the sixth viewpoint is installed in an indoor space with a floor area of ^70m2 or more and ^95m2 or less and an existing first ventilation device, and the existing first ventilation device changes every hour. The air volume is the first ventilation volume, and the air-conditioning and ventilation system includes: an air-conditioning device with a cooling rated capacity of about 12.5kW; and a ventilation device with a maximum ventilation volume of 250m ³ /h.

If this air-conditioning and ventilation system is installed in the indoor space of the above-mentioned floor area that has ensured the first ventilation rate in an existing building, the ventilation rate required as a countermeasure against pathogen infection can be obtained, and the air-conditioning device can The total air-conditioning load of the indoor space including the air-conditioning load due to the increased ventilation volume is processed.

The air-conditioning and ventilation system of the seventh aspect is installed in an indoor space with a floor area of ^40m2 or more and ^60m2 or less and an existing first ventilation device, and the existing first ventilation device changes every hour. The air volume is the first ventilation volume, and the air-conditioning and ventilation system includes: an air-conditioning device with a cooling rated capacity of about 7.1kW; and a ventilation device with a maximum ventilation volume of 150m ³ /h.

If this air-conditioning and ventilation system is installed in the indoor space of the above-mentioned floor area that has ensured the first ventilation rate in an existing building, the ventilation rate required as a countermeasure against pathogen infection can be obtained, and the air-conditioning device can The total air-conditioning load of the indoor space including the air-conditioning load due to the increased ventilation volume is processed.

The air-conditioning ventilation system of an 8th viewpoint In addition to the air-conditioning ventilation system of a 6th viewpoint or a 7th viewpoint, an air conditioner has an air supply port. The air supply port receives supply air from the outside of the indoor space. The ventilation device has an air supply fan. The air supply fan is a fan for sending external air as supply air to the air conditioner. In addition, the air-conditioning and ventilation system according to the eighth viewpoint further includes an air supply path forming member. The air supply path forming part is connected with the ventilation device and the air conditioner to form the air supply path. The air supply path is an air flow path that guides supply gas from the ventilator to the air supply port of the air conditioner.

This air-conditioning and ventilation system encapsulates the ventilating device, air-conditioning device, and air supply path forming parts, so compared with the case of connecting the ventilating device and the air-conditioning device using parts such as pipes procured on site, it is possible to reduce the cost of installation work. The import cost including the cost of . In addition, since the supply air from the ventilator is received by the air conditioner, the temperature of the supply air can be changed in the air conditioner and then supplied to the indoor space.

In the air-conditioning and ventilation system of the ninth aspect, in addition to the air-conditioning and ventilation system of the eighth aspect, the ventilation device further includes a casing, an exhaust fan, and a heat exchanger. The housing houses the supply and exhaust fans. The exhaust fan is a fan for sending the air in the indoor space out of the indoor space as exhaust air. The heat exchanger exchanges heat between the outside air and the return air that becomes exhaust air. A first opening, a second opening, a third opening, and a fourth opening are formed in the case. The third opening is an opening for taking in outside air. The fourth opening is connected to the air supply path forming member. The first opening is an opening for taking in air in the indoor space as return air. The second opening is an opening for sending the return gas to the outside of the indoor space as exhaust gas. In addition, the air-conditioning and ventilation system of the ninth aspect further includes a pressure adjustment unit. The pressure regulator adjusts the pressure of the air so that the pressure of the return gas flowing from the first opening to the second opening in the ventilator is the same as the pressure of the external air flowing from the third opening to the fourth opening in the ventilator. The difference in pressure becomes smaller.

Here, when the exhaust fan operates, air in the indoor space is taken into the housing from the first opening as return air, and is sent out of the indoor space from the second opening as exhaust air. In addition, when the air supply fan operates, external air is taken into the casing from the third opening, flows from the third opening to the fourth opening, and supplies air from the fourth opening to the air conditioner through the air supply path. The return air taken into the casing from the first opening and the outside air taken into the casing from the third opening exchange heat in the heat exchanger. Accordingly, it is possible to suppress an increase in the air-conditioning load of the indoor space due to ventilation.

In addition, in the air-conditioning and ventilation system according to the ninth aspect, a pressure regulator is provided so as to reduce the difference between the pressure of the outside air and the pressure of the return air that exchange heat with each other. Thereby, it is possible to suppress troubles such as mixing of external air and return air in a heat exchanger or the like.

The air-conditioning and ventilation system according to the tenth aspect is the air-conditioning system according to any one of the sixth to ninth aspects, and further includes a remote controller for controlling the air-conditioning device and the ventilation device.

Here, for example, by using a remote controller, it is possible to link the operation/stop of the air conditioner and the ventilator, or to control not to perform ventilation by the ventilator when the air conditioner is not in operation.

Description of drawings

FIG. 1A is a state diagram of a building provided with a first ventilation device and an air conditioning and ventilation system.

Fig. 1B is a state diagram of the building before the second ventilator is added.

2 is a perspective view for assembling an air-conditioning indoor unit, a supply air intake member attached to the air-conditioning indoor unit, and an air supply duct.

Figure 3 is a control block diagram of the air conditioning ventilation system.

Fig. 4A is a diagram showing a ventilation state in a room by the first ventilation device before the second ventilation device is installed.

FIG. 4B is a diagram showing the indoor ventilation state when the window is opened to increase the ventilation amount without installing the second ventilation device.

FIG. 4C is a diagram showing a ventilation state in a room when a second ventilation device is additionally installed.

5 is a table showing various numerical values for combinations of candidates for the second ventilator and candidates for the air-conditioning indoor unit.

Detailed ways

(1) The overall structure of the first ventilation device and air conditioning ventilation system

FIG. 1A shows the installation state of the first ventilation device 10 and the air conditioning ventilation system 100 in the building H. As shown in FIG. The first ventilation device 10 and the air-conditioning ventilation system 100 are installed for one predetermined indoor space SI in the building H. As shown in FIG. The air conditioning ventilation system 100 mainly includes a second ventilation device 20 , an air conditioning indoor unit 30 , ducts 21 to 24 , and a remote controller 90 .

The first ventilator 10 is a ventilator installed for the indoor space SI before the second ventilator 20 is installed.

The air-conditioning indoor unit 30 of the air-conditioning and ventilation system 100 is also a device that has been installed for the indoor space SI before the second ventilation device 20 is installed.

FIG. 1B shows the state of the building H before the second ventilator 20 is installed.

The second ventilator 20 and the ducts 21 to 24 of the air-conditioning and ventilation system 100 are additionally installed for the indoor space SI where the first ventilator 10 and the air-conditioning indoor unit 30 are already installed.

In this embodiment, it is assumed that the first ventilation device 10 and the air-conditioning indoor unit 30 shown in FIG. 1A and FIG. The means of setting up the design study phase are described.

(2) Details of the first ventilation device

The first ventilator 10 is a ventilator with a propeller fan or a ventilator with a Sirocco fan. The first ventilator 10 shown in FIGS. 1A and 1B takes in room air in the indoor space SI, and discharges it to the outside of the building H (outdoor space SO). The intake port of the first ventilator 10 is connected to the first return air port 16 provided on the ceiling of the indoor space SI. The air supply port of the first ventilation device 10 is connected to the first exhaust port 18 opened on the outer wall of the building H. As shown in FIG. The first ventilation device 10 has a ventilation rate of, for example, 500 m ³ /h.

(3) Details of air conditioner indoor unit

The air conditioner indoor unit 30 constitutes an air conditioner together with an air conditioner outdoor unit (not shown) installed on the roof of the building H or outside. The air conditioner is a device that cools and heats the indoor space SI through a vapor compression refrigeration cycle. As shown in FIG. 1A or FIG. 1B , the air conditioner indoor unit 30 has a heat exchanger 37 constituting a refrigeration cycle, an indoor fan 35 for sending indoor air to the heat exchanger 37 and returning to the indoor space SI, and the like. The casing of the air conditioner indoor unit 30 is rectangular in plan view, with a suction port 31 formed in the center of the lower surface, and air outlets 32 formed along the four sides of the lower surface. Indoor air is sucked in from the suction port 31 (see arrow Ain in FIG. 1A ), and air-conditioned air is returned to the indoor space SI from the blower port 32 (see arrow Aout in FIG. 1A ).

In addition, in the air-conditioning indoor unit 30 shown in FIG. 1A, the supply air intake member 30a shown in FIG. 2 is attached as optional equipment. The supply air intake member 30a is a member that forms a flow path through which air flows. The air taken in from the inlet 33 of the supply air intake member 30 a flows out to the vicinity of the suction port 31 of the casing of the air conditioning indoor unit 30 .

(4) Details of the second ventilation device and pipelines that constitute the air-conditioning ventilation system together with the air-conditioning indoor unit

The second ventilator 20 is arranged in the space SC behind the ceiling of the indoor space SI of the building H, and ventilates the indoor space SI while making the external air OA which becomes the supply air SA and the return air RA which becomes the exhaust air EA heat exchange between them.

The ducts 21 to 24 are a return air duct 21 , an exhaust duct 22 , an external air introduction duct 23 , and an air supply duct 24 .

The second ventilator 20 has a casing 50 , an air supply fan 26 , an exhaust fan 28 , a heat exchange element 40 having a substantially rectangular prism shape, and a ventilation control unit 70 .

The housing 50 accommodates the heat exchange element 40, the air supply fan 26, the exhaust fan 28, etc. inside. In addition, the casing 50 is formed with a first opening 51 connected to the return gas duct 21 , a second opening 52 connected to the exhaust duct 22 , a third opening 53 connected to the external air introduction duct 23 , and a third opening 53 connected to the air supply duct 24 . Connected fourth opening 54 .

Inside the housing 50 there are a first space 51a between the first opening 51 and the heat exchange element 40, a second space 52a between the second opening 52 and the heat exchange element 40, and a space between the third opening 53 and the heat exchange element 40. The third space 53a between them, and the fourth space 54a between the fourth opening 54 and the heat exchange element 40 .

The air supply fan 26 is arrange|positioned in the 4th space 54a, and has the air supply fan motor 26m. The exhaust fan 28 is arrange|positioned in the 2nd space 52a, and has the exhaust fan motor 28m.

The return air duct 21 connects the first opening 51 of the second ventilator 20 and the second return air port 81 provided on the ceiling of the indoor space SI to form a return air passage 21a through which the return air RA flows.

The exhaust pipe 22 connects the second opening 52 of the second ventilator 20 and the second exhaust port 82 opened on the outer wall of the building H to form an exhaust passage 22a for the exhaust gas EA to flow.

The outside air introduction duct 23 connects the third opening 53 of the second ventilator 20 and the outside air introduction port 83 opened on the outer wall of the building H to form an outside air introduction path 23a through which the outside air OA flows.

The air supply duct 24 connects the fourth opening 54 of the second ventilator 20 and the inlet 33 of the supply air intake member 30a additionally provided in the air conditioner indoor unit 30 to form an air supply path 24a through which the supply air SA flows. The air supply duct 24 is divided into two and connected to two inlets 33 . By dividing into two, the area of the air path can be increased, and the pressure loss in the air supply duct can be reduced.

As shown in FIG. 3 , the ventilation control unit 70 is connected to the air supply fan motor 26m, the exhaust fan motor 28m, the remote controller 90, and the like. The ventilation control unit 70 is realized by a computer. The ventilation control unit 70 includes a control computing device and a storage device. A processor such as a CPU or a GPU can be used as the control computing device. The control operation device reads out the program stored in the storage device, and performs predetermined image processing or operation processing according to the program. Furthermore, the control calculation device can write calculation results into the storage device or read information stored in the storage device according to the program. The ventilation control unit 70 turns on and off the air supply fan 26 and the exhaust fan 28 in accordance with an instruction or the like from a remote controller 90 described later.

In addition, illustration and description are omitted here, but an outside air temperature sensor and a room temperature sensor may be connected to the ventilation control unit 70 and the sensor values may be used for control.

(5) Details of the remote control

The remote controller 90 is used for the user in the indoor space SI to perform various setting operations on the air-conditioning indoor unit 30 and the second ventilation device 20 . The remote controller 90 is also realized by a computer in the same manner as the ventilation control unit 70 .

The remote controller 90, the ventilation control unit 70, and the control unit (not shown) of the air-conditioning indoor unit 30 are connected via communication lines.

(6) Details of the ventilation of the air conditioning ventilation system

The remote controller 90 operates the second ventilator 20 when the indoor fan 35 of the air conditioner indoor unit 30 operates. In other words, when the second ventilator 20 needs to be operated, the remote controller 90 also operates the air conditioner indoor unit 30 . When the air supply fan 26 and the exhaust fan 28 of the second ventilator 20 work, the outside air OA in the outdoor space SO reaches the heat exchange element 40 from the outside air introduction path 23a, and the air passing through the heat exchange element 40 passes through the supply air. The fan 26 supplies the indoor space SI as fresh supply air SA. The indoor air in the indoor space SI reaches the heat exchange element 40 as return air RA via the return air passage 21a, and the air passing through the heat exchange element 40 passes through the exhaust fan 28, and is discharged into the outdoor space SO as exhaust air EA.

In the heat exchange element 40, heat is exchanged between the outside air OA and the return air RA, and an increase in the air conditioning load accompanying the ventilation of the second ventilator 20 is suppressed.

(7) The selection method of the second ventilation device and the selection method of the air conditioner indoor unit to increase the ventilation volume of the indoor space

As shown in FIG. 1B , for the indoor space SI of the building H where the first ventilator 10 and the air conditioner indoor unit 30 are installed, it is required to increase the ventilation volume as one of the countermeasures against infection by pathogens such as viruses and bacteria. For example, it is assumed that the ventilation rate of the first ventilator 10 is determined by the design of the ventilation volume per person of 20 m ³ /h, but further, a ventilation volume of 10 m ³ /h, totaling 30 m ³ /h is required. In other words, it is required to increase the current ventilation rate to 1.5 times. In this case, the second ventilator 20 to be additionally installed is selected through the following steps.

(7-1) Selection method of the second ventilation device

First, in the first step, the second ventilation volume required for the additionally installed second ventilation device 20 is obtained from the size of the indoor space SI. In this embodiment, the first step includes the step of calculating the maximum number of people entering the indoor space SI and the step of calculating the ventilation volume required in the indoor space SI according to the maximum number of people. Specifically, the amount of ventilation required in the indoor space SI is a value obtained by dividing the floor area (m ² ) of the indoor space SI by the value determined by the use of the indoor space SI (room) (general store, office building, etc.) The value obtained per person's dedicated area (m ² ) is multiplied by the ventilation rate per hour (m ³ /h) required per one person. The dedicated area per person (m ² ) determined by the use of the indoor space SI is determined to be 3 m ² , 5 m ^{2 ,} etc., for example, depending on the use. The required air exchange rate may be calculated using the volume (m ³ ) of the indoor space SI and the required air exchange rate of the room.

The first ventilation rate (m ³ /h) is, for example, the ventilation rate required for the indoor space SI based on human carbon dioxide emissions. The second ventilation rate (m ³ /h) is the ventilation rate per hour required for the indoor space SI as a countermeasure against pathogen infection. Pathogens to be targeted for countermeasures against infection are, for example, viruses or bacteria such as influenza virus, norovirus, coronavirus, and tuberculosis. The second ventilation rate (m ³ /h) is a value larger than the first ventilation rate (m ³ /h).

Next, in the second step, the difference between the second ventilation rate and the first ventilation rate is obtained as the additional ventilation rate (m ³ /h). The first ventilation rate (m ³ /h) is the ventilation rate of the first ventilation device 10 already installed for the indoor space SI.

Next, in the third step, a ventilator capable of performing ventilation with an additional ventilation amount is selected as the additional second ventilator 20 . In the third step, the second ventilator 20 is selected from the ventilator candidates V1 to V6 shown in (7-2) below.

(7-2) Candidates V1 to V6 of ventilator

Candidates for ventilation devices are ventilation device V1 with a ventilation volume of 150m ³ /h, ventilation equipment V2 with a ventilation volume of 250m ³ /h, ventilation equipment V3 with a ventilation volume of 350m ³ /h, and a ventilation volume of 500m ³ /h ventilation device V4, ventilation device V5 with a ventilation volume of 650m ³ /h, and ventilation device V6 with a ventilation volume of 800m ³ /h.

(7-3) Selection method of air conditioner indoor unit

After the selection of the second ventilator 20 in the third step is completed, the process proceeds to the fourth step. In the fourth step, the sum of the first air-conditioning load, the second air-conditioning load, and the third air-conditioning load is calculated as the total air-conditioning load. The first air-conditioning load is an air-conditioning load determined based on the size of the indoor space SI, and is calculated by summing up heat loads of people and equipment indoors, solar heat entering through windows and walls, and heat loads based on temperature differences between inside and outside. out. The cooling and heating air-conditioning load (first air-conditioning load) per unit area is known according to the use of the indoor space SI (room) of the building H (general store, office building, etc.). The second air-conditioning load is an air-conditioning load generated by the ventilation of the existing first ventilation device 10 . When ventilation is performed, external air is taken into the indoor space SI through ducts, gaps in doors, etc., and a load is generated to maintain the external air at the indoor temperature and humidity. The external air load is a second air conditioning load generated by ventilation. The third air conditioning load is the air conditioning load generated by the ventilation of the second ventilation device 20 selected in the third step.

In addition, in the fourth step, the third air conditioning load is obtained in consideration of the heat exchange amount due to the heat exchange between the outside air OA and the return air RA in the heat exchange element 40 of the second ventilator 20 . The heat exchange element 40 is provided to recover the total heat (sensible heat and latent heat) of air-conditioning energy lost due to ventilation, and the recovered amount is considered in the fourth step.

In the fifth step, an air-conditioning indoor unit 30 having an air-conditioning capability capable of handling the total air-conditioning load is selected from candidates of a plurality of air-conditioning indoor units with different air-conditioning capabilities. Here, the air-conditioning indoor unit 30 is selected from the candidates A1 to A9 of the air-conditioning indoor units shown in (7-4) below.

(7-4) Air Conditioning Indoor Unit Candidates A1 - A9

Candidates for the air-conditioning indoor unit with respect to the indoor space SI used as a general store are the 1.5-horsepower (3.6 kW) air-conditioning indoor unit A1 suitable for a floor area of 22 to 25 m ² , and the 1.8 horsepower (3.6 kW) air-conditioning indoor unit suitable for a floor area of 25 to 28 m ^{2 .} Horsepower (4.0kW) air-conditioning indoor unit A2, 2 horsepower (4.5kW) air-conditioning indoor unit A3 suitable for a floor area of ^28-31m2 , 2.3 horsepower (5.0kW ⁾ suitable for a floor area of 31-35m2 Air-conditioning indoor unit A4, 2.5-horsepower (5.6kW) air-conditioning indoor unit A5 suitable for a floor area of ^35-39m2 , 3-horsepower (7.1kW) air-conditioning indoor unit A6 suitable for a floor area of ^44-50m2 , suitable for The 4-horsepower (10.0kW) air-conditioning indoor unit A7 for a floor area of ^62-70m2 , the 5-horsepower (12.5kW) air-conditioning indoor unit A8 for ^a floor area of 78-88m2, and the air-conditioning indoor unit A8 for a floor area of ^89-100m2 The 6 horsepower (14.0kW) air conditioner indoor unit A9 with the largest floor area. The number of candidates A1 to A9 of this air-conditioning indoor unit is larger than the number of candidates V1 to V6 of the above-mentioned ventilator.

(7-5) Reconsideration of the selection of the second ventilation device and the indoor unit of the air conditioner

In the sixth step, it is judged whether the air volume of the second ventilator 20 selected in the third step is less than 30% of the rated air volume of the air conditioner indoor unit 30 selected in the fifth step. .

Next, in the seventh step, when it is determined in the sixth step that the air volume at the time of the maximum air exchange rate of the second ventilator 20 exceeds 30% of the rated air volume of the air-conditioning indoor unit 30, the second air exchange rate is reconsidered. The selection of equipment and indoor units of air conditioners. In the selected reconsideration, the air-conditioning indoor unit 30 is reselected from the candidates of the air-conditioning indoor unit with a larger rated air volume, or the second air-conditioning indoor unit 30 is re-selected from the candidates of the ventilation device with a smaller maximum air-flow volume. device 20.

(7-6) Specific examples of selection

Next, with reference to FIGS. 4A to 4C , for the indoor space SI of the building H in which the first ventilation device 10 has been installed, the ventilation rate is increased and the second ventilation device 20 is additionally installed. Selected specific examples will be described.

As shown in FIG. 4A , it is assumed that a 5-horsepower (5HP) air-conditioning indoor unit 30 and a first ventilation device 10 with a ventilation volume of 500m ³ /h are installed in an indoor space SI of a store. The dedicated area (m ² ) per one person determined according to the use of the indoor space SI is 3 m ² in the case of a general store. In the case of a store where the floor area of the indoor space SI is 75m ² and the number of people in the indoor space SI is 25 people, the ventilation volume was designed at 20m ³ /h per person in the past, and the ventilation volume is set at 500m ³ / The first ventilation device 10 of h. In general stores, the air-conditioning indoor unit 30 of 5 horsepower has an air-conditioning capacity of 12.5 kW, which can perform air-conditioning in a room with a floor area of 83 m ³ . On the other hand, when the current ventilation rate is 500 m ³ /h, the air-conditioning capacity required for the indoor space SI with a floor area of 75 m ² of a general store is 11.3 kW. Therefore, the 5-horsepower air-conditioning indoor unit 30 has a margin of about 10% with respect to the floor area of the current indoor space SI of 75 m ² .

As a countermeasure against pathogen infection in this store, in consideration of increasing the current ventilation rate (20m ³ /h per person) and securing a total ventilation rate of 30m ³ /h (per person) for the indoor space SI, As a simple method, open a window for ventilation as a candidate.

In the case of opening the window for ventilation, as shown in FIG. 4B , it is necessary to open the window and additionally take in 250 m ³ /h of outside air into the indoor space SI. However, if the windows are opened, problems such as an increase in noise, intrusion of insects into the indoor space SI, and occurrence of temperature unevenness in the indoor space SI occur, which hinder the comfort of customers in the store. In addition, as the air-conditioning load increase caused by the introduction of external air, for example, when the external air temperature is 35°C and the indoor temperature is 27°C, the external air load increases by 1.5kW, and for the floor area of the indoor space SI of 75m ² , 12.8kW ( =11.3kW+1.5kW) air-conditioning capacity. On the other hand, the air-conditioning capacity (12.5kW) of the existing 5-horsepower air-conditioning indoor unit 30 is insufficient. Therefore, a shop that opens the window for ventilation must remove the 5-horsepower air-conditioning indoor unit 30 and reinstall the 6-horsepower (14.0kW) air-conditioning indoor unit 30. ) air conditioner indoor unit.

On the other hand, as a method of securing a total ventilation rate of 30 m ³ /h for the indoor space SI, if the selection method shown in the above-mentioned (7-1) to (7-5) is adopted, the initial cost can be suppressed. , operating costs, while ensuring the ventilation volume of the indoor space SI and handling the air conditioning load.

Using the above-mentioned selection method, first, in step 1, the second air exchange rate required for the indoor space SI as a countermeasure against pathogen infection is obtained based on the size of the indoor space SI (floor area of 75 m ² and capacity of 25 people) . Here, 30 m ³ /h is required per person as a measure against pathogen infection, and the second ventilation rate is calculated as 750 m ³ /h (25×30 m ³ /h).

Next, in the second step, the difference between the second ventilation rate and the first ventilation rate is obtained as the additional ventilation rate (m ³ /h). The additional ventilation volume is determined to be 250 m ³ /h (second ventilation volume 750 m ³ /h−first ventilation volume 500 m ³ /h of the first ventilation device 10 ).

Next, in the third step, a ventilator capable of performing ventilation with an additional ventilation amount is selected from among the above-mentioned ventilator candidates V1 to V6, and is selected as the second ventilator 20 . Here, the ventilation device V2 having a ventilation rate of 250 m ³ /h is selected as the second ventilation device 20 .

Next, in the fourth step, the sum of the first air-conditioning load, the second air-conditioning load, and the third air-conditioning load is calculated as the total air-conditioning load. As described above, the second air-conditioning load is the air-conditioning load generated by the ventilation of the conventional first ventilator 10 . The total of the second air-conditioning load and the first air-conditioning load generated by the ventilation performed by the existing first ventilation device 10 (air exchange rate: 500m ³ /h) is calculated in the indoor space SI with a floor area of 75m ² in a general store. In this case, it becomes 11.3kW mentioned above. The third air-conditioning load is an additional air-conditioning load accompanying the ventilation operation of the second ventilator 20 due to the additional installation of the second ventilator 20 . In the case where the ventilation device selected as the second ventilation device 20 is the ventilation device V2 with a ventilation volume of 250 m ³ /h, when the outside air temperature is 35°C and the indoor temperature is 27°C, the additional air conditioning load (No. Three air conditioning load) is 0.6kW. In the above-mentioned case of opening the window for ventilation, it is 1.5kW under the same conditions, but in the case of using the second ventilation device 20, since the total heat exchange in the heat exchange element 40 is performed, the air conditioning load is added. 0.6kW. Therefore, the total air conditioning load is 11.9 kW (11.3 kW+0.6 kW).

For reference, FIG. 5 shows additional air-conditioning loads and other numerical values for each combination of candidates for the second ventilator 20 and candidates for the air-conditioning indoor unit 30 .

Next, in the fifth step, an air-conditioning indoor unit 30 having an air-conditioning capability capable of handling the total air-conditioning load is selected from the candidates A1 to A9 of the air-conditioning indoor units. Here, the 5-horsepower (12.5 kW) air-conditioning indoor unit A8 already installed for the indoor space SI is selected as the air-conditioning indoor unit 30 . This is because the total air conditioning load (11.9 kW) can be handled with 5 horsepower (12.5 kW).

Next, in the sixth step, it is determined whether the air volume at the maximum air exchange rate of the second ventilation device 20 selected in the third step is 30% of the rated air volume of the air-conditioning indoor unit 30 selected in the fifth step. %the following. Here, the air volume at the time of the maximum ventilation volume of the second ventilator 20 is 30% or less of the rated air volume of the air-conditioning indoor unit 30 . Therefore, reconsideration of the selection of the second ventilator and the air-conditioning indoor unit in the seventh step is not performed.

In this way, here, as shown in FIG. 4C, a second ventilation device 20 with a heat exchange element 40 for performing total heat exchange is added, and the second ventilation device 20 and the existing 5-horsepower air-conditioning indoor unit 30 constitutes the air conditioning ventilation system 100.

In addition, as mentioned above, in the case of opening the window for ventilation as a countermeasure against pathogen infection, the 5-horsepower air-conditioning indoor unit 30 must be removed and a 6-horsepower (14.0 kW) air-conditioning indoor unit must be installed again. In the case of the second ventilator 20 having the heat exchange element 40 for total heat exchange, the existing 5-horsepower air conditioner indoor unit 30 can be directly used.

(8) Features of the selection method of the second ventilation device

(8-1)

According to the selection method of the second ventilation device described in (7) above, the first ventilation volume of the existing first ventilation device 10 is directly used, and the second ventilation device 20 makes up for the shortage. The second ventilator 20 was selected based on an excellent idea such as ventilating the amount of ventilated air that has never existed before. Thereby, the ventilation of the second ventilation amount required as a countermeasure against pathogenic infection can be realized while suppressing the cost.

(8-2)

In the case where an additional second ventilator 20 is provided for the indoor space SI in addition to the existing first ventilator 10, it is assumed that the air conditioning load of the indoor space SI increases due to the ventilation of the second ventilator 20. . If this is not taken into account, the warm environment of the indoor space SI may deteriorate. In view of this, in the method of selecting the second ventilator 20 and the air-conditioning indoor unit 30 described above, the air-conditioning indoor unit 30 capable of handling the total air-conditioning load including the air-conditioning load by ventilation is selected. Accordingly, it can be determined whether the air-conditioning indoor unit 30 already installed in the indoor space SI can be used as it is, or whether it needs to be replaced with a new air-conditioning indoor unit 30 with a higher air-conditioning capability.

(8-3)

In the method of selecting the second ventilator described in (7) above, the second ventilator 20 having the heat exchange element 40 for exchanging heat between the supply gas SA and the exhaust gas EA is selected as an additional ventilation device. Therefore, deterioration of the warm environment of the indoor space SI due to the ventilation of the second ventilator 20 can be suppressed to a small extent. Furthermore, since the third air-conditioning load (air-conditioning load accompanying additional ventilation) is obtained in consideration of the heat exchange amount in the heat exchange element 40, the total air-conditioning load is not calculated excessively. In this way, the required air-conditioning capacity is accurately recognized, and the air-conditioning indoor unit 30 without excess or deficiency is selected.

(8-4)

When the air volume at the maximum ventilation volume of the second ventilator 20 added as a countermeasure against pathogen infection exceeds 30% of the rated air volume of the air-conditioning indoor unit 30, even if the air-conditioning capacity of the air-conditioning indoor unit 30 can be summed up The handling of the air-conditioning load, the operating efficiency of the air-conditioning device will also deteriorate, and the operating cost may be high. In view of this, in the method for selecting the second ventilation device and the air-conditioning indoor unit in this embodiment, the sixth step and the seventh step are performed, and the selection of the second ventilation device and the air-conditioning indoor unit is reconsidered. Thereby, for example, an air-conditioning indoor unit with a higher rated air volume and air-conditioning capability can be selected, thereby reducing running costs for air-conditioning and ventilation.

(8-5)

In the above embodiment, by preparing a large number of air-conditioning indoor unit candidates shown in (7-4) above, it is possible to select a more appropriate air-conditioning indoor unit 30 according to the selected second ventilator 20 . Thereby, the running cost and installation cost of the air conditioning ventilation system 100 can be suppressed.

(9) Deformation and characteristics of the air-conditioning ventilation system

(9-1)

In the air-conditioning and ventilation systems 100 of (1) to (6) described above, the case where the air-conditioning indoor unit 30 is already installed has been described, but as the air-conditioning and ventilation system 100, the second ventilation device 20. The air-conditioning indoor unit 30 and the pipes 21 to 24 such as the air supply pipe 24 forming the flow path for supplying the gas SA are packaged. When the fan of the second ventilator 20 is operated at a predetermined speed, the ducts 21 to 24 connected to the second ventilator and the supply air intake member described later are arranged so that the air volume supplied to the room becomes the target ventilation air volume. 30a is configured to have a certain flow path resistance. Encapsulation refers to a system in which a desired flow path can be created only by connecting the pipes 21 to 24 having flow path resistance and the supply gas intake member 30a to the air conditioner indoor unit 30 and the second ventilator 20 As a result, the target ventilation air volume can be supplied without calculating the flow path resistance on site. The packaged air-conditioning and ventilation system 100 can reduce the introduction cost including the cost of installation work compared to the case where the ventilator and the indoor unit of the air conditioner are connected using components such as pipes procured on site.

(9-2)

In addition, in the air-conditioning and ventilation system 100, the supply air SA from the second ventilation device 20 enters the air-conditioning indoor unit 30, and therefore, the temperature of the supply air SA can be adjusted by the air-conditioning indoor unit 30, and the temperature can be adjusted to Indoor space SI supply.

(9-3)

The air conditioning and ventilation system 100 includes a remote controller 90 for controlling the air conditioning indoor unit 30 and the second ventilation device 20 . Thereby, it is possible to link the operation/stop of the air-conditioning indoor unit 30 with the second ventilator 20, or to control so that ventilation by the second ventilator 20 is not performed when the air-conditioning indoor unit 30 is not in operation.

In addition, in the air-conditioning and ventilation system 100, if the ventilation of the second ventilation device 20 is performed when the air-conditioning indoor unit 30 is not in operation, dust adhering to the suction filter of the air-conditioning indoor unit 30 may fall into the indoor space. Bad situations like SI. This disadvantage can be prevented by setting the remote control 90 and the linkage control of the air conditioner indoor unit 30 and the second ventilator 20 .

(10) Specific examples of air conditioning and ventilation systems

(10-1)

In the selected specific example of the second ventilation device of (7-6) above, the following situation has ^been described: Assume that a 5 horsepower (5HP ) air-conditioning indoor unit 30 and the first ventilation device 10 with an air exchange rate of 500m ³ /h. As a countermeasure against pathogen infection, the current air exchange rate (20m ³ /h per person) is increased to secure the indoor space SI A total of 30m ³ /h ventilation volume per person.

If selected through the same idea as this specific example, the air-conditioning and ventilation system installed in an indoor space with a floor area of ^70m2 or more and ^{95m2 or} less preferably includes: an air-conditioning indoor unit with a cooling rated capacity of about 12.5kW; And the second ventilation device, its maximum ventilation volume is 250m ³ /h.

If the air-conditioning and ventilation system is installed in an existing building to ensure the first ventilation rate (for example, the ventilation rate twice the maximum ventilation rate of the second ventilation device) in the indoor space of the above-mentioned floor area , the air exchange rate required as a countermeasure against pathogen infection can be obtained, and the total air conditioning load of the indoor space including the air conditioning load caused by the increased air exchange rate can be processed by the air conditioner.

(10-2)

In the selected specific example of the second ventilation device of (7-6) above, the following situation has ^been described: Assume that a 5 horsepower (5HP ) air-conditioning indoor unit 30 and the first ventilation device 10 with an air exchange rate of 500m ³ /h. As a countermeasure against pathogen infection, the current air exchange rate (20m ³ /h per person) is increased to secure the indoor space SI A total of 30m ³ /h ventilation volume per person.

If selected through the same idea as this specific example, the air-conditioning and ventilation system installed in an indoor space with a floor area of ^40m2 or more and ^{60m2 or} less preferably includes: an air-conditioning indoor unit with a cooling rated capacity of about 7.1kW; And the second ventilation device, its maximum ventilation volume is 150m ³ /h.

If the air-conditioning and ventilation system is installed in an existing building in the indoor space of the above-mentioned floor area that ensures the first ventilation rate (for example, the ventilation rate twice the maximum ventilation rate of the second ventilation device), Then, the air exchange rate required as a countermeasure against pathogen infection can be obtained, and the total air conditioning load of the indoor space including the air conditioning load due to the increased air exchange rate can be processed by the air conditioner.

(11)Modification

(11-1)

In the air-conditioning and ventilation system 100 of the above-mentioned embodiment, the indoor air in the indoor space SI reaches the heat exchange element 40 as return air RA via the return air passage 21a, and the air passing through the heat exchange element 40 passes through the exhaust fan 28 to become exhaust gas. EA is exhausted to the outdoor space SO. On the other hand, the outside air OA in the outdoor space SO reaches the heat exchange element 40 from the outside air introduction path 23a, and the air passing through the heat exchange element 40 is supplied to the indoor space SI as fresh supply air SA by the air supply fan 26. However, a certain level of static pressure is required in order to pass the supply gas SA through the narrow flow path in the air-conditioning indoor unit 30 to which the supply gas intake member 30a is attached. Therefore, a pressure difference may be generated between the flow paths of the return gas RA and the exhaust gas EA having low flow path resistance, and the flow paths of the outside air OA and the supply gas SA having large flow path resistance.

Therefore, when the pressure loss of the supply gas SA becomes considerably large, it is preferable to add a pressure adjustment unit to the air conditioning ventilation system 100 .

For example, as a pressure regulator, a decompression member 58 such as a baffle or a damper is provided in the first space 51a of the second ventilator 20 in FIG. 1A to increase the flow path resistance of the return gas RA and the exhaust gas EA. Then, the above-mentioned pressure difference becomes small, and the trouble of mixing the external air and the return air hardly occurs in the heat exchange element 40 .

(11-2)

The embodiments of the present invention have been described above, but it should be understood that various changes in the form and details can be made without departing from the spirit and scope of the present disclosure described in the claims.

Label description

10 first ventilation device

20 Second ventilator (ventilator, additional ventilator)

24 Air supply path forming part

24a gas supply path

26 air supply fan

28 exhaust fan

30 Air-conditioning indoor unit (air-conditioning unit)

30a supply gas intake part

33 Inlet of supply gas intake part (air supply port)

40 heat exchange elements

50 shells

51 first opening

52 second opening

53 third opening

54 fourth opening

58 decompression part (pressure adjustment part)

90 remote control (controller)

100 air conditioning ventilation system

EA Exhaust Gas

OA outside air

RA return gas

SA supply gas

SI interior space

SO outdoor space (outside the indoor space)

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2005-300112

Claims (10)

1. A method for selecting an additional ventilator, which is a method for selecting an additional ventilator when the additional ventilator (20) is replaced with another ventilator with respect to an indoor Space (SI) in which an existing first ventilator (10) is installed, wherein the ventilation amount of the existing first ventilator (10) per 1 hour is a first ventilation amount,

the method for selecting the additional ventilation device comprises the following steps:

a first step of obtaining a second ventilation amount, which is a ventilation amount per 1 hour required as a countermeasure against pathogen infection, from the size of the indoor Space (SI);

a second step of obtaining a difference between the second ventilation and the first ventilation as an additional ventilation; and

and a third step of selecting, as the additional ventilator (20), a ventilator capable of ventilating the additional ventilation amount.

2. A method for selecting an additional ventilator and an air conditioner, wherein the additional ventilator (20) is selected by the method for selecting according to claim 1, and the air conditioner (30) for air-conditioning the indoor space is further selected,

The method for selecting an additional ventilation device and an air conditioner comprises the steps of:

a fourth step of obtaining, as a total air-conditioning load, a sum of a first air-conditioning load determined based on the size of the indoor Space (SI), a second air-conditioning load generated by ventilation of the existing first ventilator, and a third air-conditioning load generated by ventilation of the additional ventilator selected in the third step; and

fifth, an air conditioner (30) having an air conditioning capacity capable of handling the total air conditioning load is selected from among a plurality of candidates of air conditioners having different air conditioning capacities.

3. The method for selecting an additional ventilator and an air conditioner according to claim 2, wherein,

in the third step, a ventilator having a heat exchange unit (40) is selected as the additional ventilator (20), the heat exchange unit (40) exchanges heat between an Outside Air (OA) which is a supply gas (SA) to the indoor space and a return gas (RA) which is an exhaust gas (EA) from the indoor space,

in the fourth step, the third air conditioning load is determined taking into consideration the heat exchange amount in the heat exchange portion (40) of the selected additional ventilator.

4. The method for selecting an additional ventilator and an air conditioner according to claim 2 or 3, wherein,

the method for selecting an additional ventilation device and an air conditioner further comprises:

a sixth step of determining whether or not the air volume at the time of the maximum ventilation volume of the additional ventilator selected in the third step is 30% or less of the rated air volume of the air conditioner selected in the fifth step; and

a seventh step of, when it is determined in the sixth step that the air volume at the time of maximum ventilation of the additional ventilator exceeds 30% of the rated air volume of the air conditioner, reconsidering selection of the additional ventilator and the air conditioner.

5. The method for selecting an additional ventilation device and an air conditioner according to any one of claim 2 to 4, wherein,

in the third step, the additional ventilator is selected from among a plurality of ventilators having different maximum ventilation amounts,

the number of candidates for the plurality of air conditioners in the fifth step is greater than the number of candidates for the plurality of ventilators in the third step.

6. An air conditioning ventilation system is arranged on a floor with the area of 70m ² Above, 95m ² An indoor space provided with a conventional first ventilation device (10), wherein the ventilation amount of the conventional first ventilation device (10) is a first ventilation amount every 1 hour,

the air conditioning ventilation system comprises:

an air conditioning unit having a rated cooling capacity of about 12.5kW; and

a ventilation device (20) with a maximum ventilation volume of 250m ³ /h。

7. An air conditioning ventilation system is arranged on a floor with an area of 40m ² Above, 60m ² An indoor space provided with a conventional first ventilation device (10), wherein the ventilation amount of the conventional first ventilation device (10) is a first ventilation amount every 1 hour,

the air conditioning ventilation system comprises:

an air conditioning unit having a rated cooling capacity of about 7.1kW; and

a ventilation device (20) with a maximum ventilation volume of 150m ³ /h。

8. An air conditioning ventilation system according to claim 6 or 7, wherein,

the air conditioner has an air supply port (33) for receiving Supply Air (SA) from outside the indoor space,

the ventilation device (20) further comprises an air supply fan (26), wherein the air supply fan (26) is used for conveying external air (OA) as the Supply Air (SA) to the air conditioning device,

the air conditioning ventilation system further comprises an air supply path forming member (24), wherein the air supply path forming member (24) is connected with the ventilation device and the air conditioning device, and forms an air supply path (24 a) for guiding the Supply Air (SA) from the ventilation device to the air supply port of the air conditioning device.

9. The air conditioning ventilation system of claim 8, wherein,

the ventilation device (20) further comprises:

a housing (50) that houses the air supply fan (26);

an exhaust fan (28) which is housed in the casing and which sends air in the indoor Space (SI) as exhaust gas (EA) to the outside (SO) of the indoor space; and

a heat exchanger (40) for exchanging heat between the return gas (RA) that becomes the exhaust gas (EA) and the Outside Air (OA),

the housing is formed with: a first opening (51) for taking in the air in the indoor space as the return gas (RA); a second opening (52) for sending the return gas (RA) out of the indoor space as the exhaust gas (EA); a third opening (53) for taking in the Outside Air (OA); and a fourth opening (54) connected to the gas supply path forming member,

the air conditioning ventilation system further comprises a pressure adjustment unit (58), and the pressure adjustment unit (58) adjusts the pressure of the air in the following manner: so that the difference between the pressure of the return gas (RA) flowing from the first opening (51) to the second opening (52) in the ventilation device and the pressure of the external gas (OA) flowing from the third opening (53) to the fourth opening (54) in the ventilation device becomes small.

10. An air conditioning ventilation system according to any of claims 6 to 9, wherein,

the air conditioning ventilation system further comprises a remote controller (90) for controlling the air conditioning device and the ventilation device.

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