CN116209860A

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

Info

Publication number: CN116209860A
Application number: CN202180063314.4A
Authority: CN
Inventors: 村井伸哉; 须原辽太; 松冈弘宗
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2020-09-18
Filing date: 2021-09-14
Publication date: 2023-06-02
Also published as: JP7132526B2; JP2022050947A; EP4215830A1; WO2022059673A1; JP7564456B2; JP2022168323A; EP4215830A4

Abstract

The second ventilator (20) selection method is a second ventilator (20) selection method when the other ventilators are replaced with the second ventilator (20) for the indoor Space (SI) in which the existing first ventilator (10) is installed. The ventilation amount of the conventional first ventilation device (10) per 1 hour is a first ventilation amount. In the first step, the second ventilation amount is obtained according to the size of the indoor space. The second ventilation is the ventilation every 1 hour required as a countermeasure against pathogen infection. In the second step, the difference between the second ventilation and the first ventilation is obtained as the additional ventilation. In the third step, a ventilator capable of ventilation with additional ventilation is selected as the second ventilator (20).

Description

Method for selecting additional ventilation device, method for selecting air conditioner, and air conditioning ventilation system

Technical Field

The present invention relates to a method for selecting an additional ventilator, a method for selecting an additional ventilator and an air conditioner, and an air conditioning ventilation system.

Background

Conventionally, a ventilator that discharges indoor air to the outside or supplies outdoor air to the inside has been widely used (for example, refer to patent document 1 (japanese patent application laid-open No. 2005-300112)).

Disclosure of Invention

Problems to be solved by the invention

Most of the existing buildings are provided with ventilation devices to perform ventilation to a certain extent.

On the other hand, recently, as one of measures against infection with a pathogen such as a virus or a bacterium (hereinafter, referred to as pathogen infection), it is demanded to increase the ventilation amount.

However, when the conventional ventilator is replaced, the cost and installation cost of the ventilator are high.

Means for solving the problems

The method for selecting the additional ventilator according to the first aspect is a method for selecting an additional ventilator when the additional ventilator is newly installed as another ventilator with respect to the indoor space in which the conventional first ventilator is installed. The ventilation amount of the existing first ventilation device every 1 hour is the first ventilation amount. The method for selecting an additional ventilator according to the first aspect includes a first step, a second step, and a third step. The first step obtains a second ventilation amount according to the size of the indoor space. As the size of the indoor space, a floor area of the indoor space, a volume of the indoor space, a number of persons accommodated in the indoor space, and the like can be used. The second ventilation is the ventilation every 1 hour required as a countermeasure against pathogen infection. In the second step, the difference between the second ventilation and the first ventilation is obtained as the additional ventilation. In the third step, a ventilator capable of ventilation of the additional ventilation amount is selected as the additional ventilator.

Here, the additional ventilator is selected according to an excellent idea that ventilation is not conventionally performed by directly using the first ventilation amount of the conventional first ventilator and supplementing the insufficient ventilation amount (additional ventilation amount) by the additional ventilator. Thus, ventilation of the second ventilation amount required as a countermeasure against pathogen infection can be realized while suppressing costs.

The method for selecting the additional ventilator and the air conditioner according to the second aspect is a method for selecting the additional ventilator, and further selecting the additional ventilator and the air conditioner according to the first aspect. An air conditioner is a device that conditions air in an indoor space. The method for selecting an additional ventilator and an air conditioner according to the second aspect further 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 obtained 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 ventilation of the existing first ventilation device. The third air conditioning load is an air conditioning load generated by ventilation of the additional ventilator selected in the third step. In the fifth step, an air conditioner 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.

In addition to the conventional first ventilator, when the additional ventilator is provided in the indoor space, it is assumed that the air conditioning load of the indoor space increases due to ventilation of the additional ventilator. If this is not considered, there is a possibility that the warm environment of the indoor space is deteriorated. In view of this, in the method for selecting an additional ventilator and an air conditioner according to the second aspect, the following air conditioner can be selected: the total air conditioning load including the air conditioning load generated by ventilation of the additional ventilation device can be processed.

In the third aspect, the method for selecting an additional ventilator and an air conditioner according to the second aspect is characterized in that in the third step, a ventilator having a heat exchange unit is selected as the additional ventilator. The heat exchange unit exchanges heat between an outside air, which is a supply gas to the indoor space, and a return gas, which is an exhaust gas from the indoor space. In the fourth step, the third air conditioning load is obtained in consideration of the heat exchange amount in the heat exchange portion of the selected additional ventilator.

Here, a ventilator having a heat exchange unit for exchanging heat between the supplied gas and the discharged gas is selected as the additional ventilator. Therefore, deterioration of the warm environment of the indoor space due to ventilation by the additional ventilator can be suppressed to be small. Further, since the third air conditioning load is obtained in consideration of the heat exchange amount in the heat exchange portion, the total air conditioning load is not calculated excessively. Thus, the air conditioning capacity of the air conditioning apparatus can be accurately identified, and the air conditioning apparatus without excess or deficiency can be selected.

The method for selecting an additional ventilator and an air conditioner according to the fourth aspect further includes a sixth step and a seventh step in addition to the method for selecting the second aspect or the third aspect. In the sixth step, it is determined 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. In the seventh step, 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, the additional ventilator and the air conditioner are newly considered for selection.

If the air volume at the time of adding the maximum ventilation amount of the ventilator exceeds 30% of the rated air volume of the air conditioner, the operation efficiency of the air conditioner may be deteriorated and the operation cost may be high even if the total air conditioning load can be handled by the air conditioning capacity of the air conditioner. In view of this, in the method for selecting an additional ventilator and an air conditioner according to the fourth aspect, the sixth step and the seventh step are performed, and the additional ventilator and the air conditioner are newly selected. Thus, for example, an air conditioner having a higher rated air volume and air conditioning capacity can be selected, and the running cost of the air conditioner and ventilation can be reduced.

The method for selecting an additional ventilator and an air conditioner according to the fifth aspect is the method for selecting any one of the second to fourth aspects, wherein in the third step, the additional ventilator is selected from among a plurality of ventilator candidates having different maximum ventilation amounts. In addition, the number of candidates for the plurality of air conditioners in the fifth step is larger than the number of candidates for the plurality of ventilation devices in the third step.

Here, by preparing a large number of candidates for air conditioners, a more appropriate air conditioner can be selected based on the selected additional ventilator. This can suppress the cost of the device and the installation cost of the device.

The air conditioning ventilation system of the sixth aspect is provided in a floor area of 70m ² Above, 95m ² An indoor space provided with a conventional first ventilation device, wherein the ventilation amount of each 1 hour of the conventional first ventilation device is a first ventilation amount, and the air conditioning ventilation system comprises: an air conditioning unit having a rated cooling capacity of about 12.5kW; and a ventilation device with a maximum ventilation volume of 250m ³ /h。

If the air conditioning ventilation system is installed in an indoor space of a conventional building where the floor area of the first ventilation is secured, the ventilation required for 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 ventilation can be handled by the air conditioning apparatus.

The air conditioning ventilation system of the seventh aspect is provided at a floor area of 40m ² Above, 60m ² An indoor space provided with a conventional first ventilation device, wherein the ventilation amount of each 1 hour of the conventional first ventilation device is a first ventilation amount, and the air conditioning ventilation system comprises: an air conditioning unit having a rated cooling capacity of about 7.1kW; and a ventilation device, the maximum of which isVentilation is 150m ³ /h。

An air conditioning ventilation system according to an eighth aspect is the air conditioning ventilation system according to the sixth or seventh aspect, wherein the air conditioning device has an air supply port. The gas supply port receives a supply gas from outside the indoor space. The ventilator has an air supply fan. The air supply fan is a fan for supplying external air as supply air to the air conditioner. The air conditioning ventilation system according to the eighth aspect further includes an air supply passage forming member. The air supply path forming part is connected with the ventilation device and the air conditioner to form an air supply path. The air supply passage is a passage for guiding the supply air from the ventilator to the air supply port of the air conditioner.

Since the ventilation device, the air conditioner, and the air supply path forming member are packaged in this air conditioning ventilation system, the cost of introduction including the cost of installation work can be reduced as compared with a case where the ventilation device and the air conditioner are connected by using a member such as a pipe purchased in the field. Further, since the supply gas from the ventilator is received by the air conditioner, the temperature of the supply gas can be changed in the air conditioner and supplied to the indoor space.

An air conditioning ventilation system according to a ninth aspect is the air conditioning ventilation system according to the eighth aspect, wherein the ventilation device further includes a housing, an exhaust fan, and a heat exchanger. The housing accommodates an air supply fan and an exhaust fan. The exhaust fan is a fan for sending air in the indoor space as exhaust gas to the outside of the indoor space. The heat exchanger exchanges heat between the outside air and the return air that is the exhaust air. The housing is formed with a first opening, a second opening, a third opening, and a fourth opening. The third opening is an opening for taking in the outside air. The fourth opening is connected to the gas supply path forming member. The first opening is an opening for taking in air of the indoor space as return gas. The second opening is an opening for sending the return gas as the exhaust gas to the outside of the indoor space. The air conditioning ventilation system according to the ninth aspect further includes a pressure adjustment unit. The pressure adjusting section adjusts the pressure of the air as follows: so that the difference between the pressure of the return gas flowing from the first opening to the second opening in the ventilator and the pressure of the external gas flowing from the third opening to the fourth opening in the ventilator becomes small.

Here, when the exhaust fan is operated, air of the indoor space is taken into the casing from the first opening as a return gas, and is sent out of the indoor space as an exhaust gas from the second opening. When the air supply fan is operated, the outside air is taken into the casing through the third opening, flows from the third opening to the fourth opening, and is supplied to the air conditioning apparatus through the air supply passage through the fourth opening. The return gas taken into the housing from the first opening and the outside gas taken into the housing from the third opening exchange heat in the heat exchanger. This can suppress an increase in the air conditioning load of the indoor space caused by ventilation.

In the air conditioning ventilation system according to the ninth aspect, the pressure adjustment unit is provided so that the difference between the pressure of the external air and the pressure of the return air, which are heat-exchanged with each other, becomes small. This can suppress the mixing of the external gas and the return gas in the heat exchanger or the like.

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

Here, for example, the operation/stop of the air conditioner and the ventilator may be linked by a remote controller, or the ventilation by the ventilator may be controlled not to be performed when the air conditioner is not operating.

Drawings

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

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

Fig. 2 is a perspective view of an air conditioning indoor unit, and a supply gas intake member and a supply gas duct mounted on the air conditioning indoor unit for assembly.

Fig. 3 is a control block diagram of an air conditioning ventilation system.

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

Fig. 4B is a view showing a ventilation state in a room in a case where a window is opened to increase ventilation amount without providing a second ventilator.

Fig. 4C is a diagram showing a ventilation state in the room in the case where the second ventilator is additionally provided.

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

Detailed Description

(1) Integral structure of first air interchanger and air-conditioning air interchanger system

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

The first ventilation device 10 is a ventilation device that has been set for the indoor space SI before the second ventilation device 20 is set.

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

Fig. 1B shows a 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 ventilation system 100 are additionally installed to the indoor space SI where the first ventilator 10 and the air conditioning indoor unit 30 are installed.

In the present embodiment, the first ventilator 10 and the air conditioning indoor unit 30 shown in fig. 1A and 1B are assumed to be installed, and the second ventilator 20 and the ducts 21 to 24 shown in fig. 1A are assumed to be installed in the design study stage.

(2) Details of the first ventilator

The first ventilator 10 is a ventilator having a propeller fan or a ventilator having a sirocco fan. The first ventilator 10 shown in fig. 1A and 1B sucks in the indoor air of the indoor space SI and discharges the air to the outside of the building H (outdoor space SO). The intake port of the first ventilator 10 is connected to a first return air port 16 provided in the ceiling of the indoor space SI. The air supply port of the first ventilator 10 is connected to a first air outlet 18 provided in the outer wall of the building H. The first ventilator 10 is 500m, for example ³ Ventilation per hour.

(3) Details of indoor unit of air conditioner

The air conditioning indoor unit 30 is a device that constitutes an air conditioning apparatus together with an air conditioning outdoor unit (not shown) provided on the roof or outside of the building H. An air conditioner is a device that performs cooling and heating of an indoor space SI by a vapor compression refrigeration cycle. As shown in fig. 1A or 1B, the air conditioning indoor unit 30 includes a heat exchanger 37 constituting a refrigeration cycle, an indoor fan 35 for sending indoor air to the heat exchanger 37 and returning the indoor air to the indoor space SI, and the like. The casing of the air conditioning indoor unit 30 is rectangular in plan view, and has a suction port 31 formed in the center of the lower surface and blow-out ports 32 formed along the four sides of the lower surface. Indoor air is sucked in through the suction port 31 (see arrow Ain in fig. 1A), and air-conditioned air is returned to the indoor space SI through the blowout port 32 (see arrow Aout in fig. 1A).

In addition, in the air conditioning indoor unit 30 shown in fig. 1A, a supply gas intake member 30a shown in fig. 2 is mounted as an optional device. The supply gas 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 gas intake member 30a 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 ventilator and the duct that form the air-conditioning ventilation system together with the air-conditioning indoor unit

The second ventilator 20 is disposed in a space SC on the back surface of the ceiling of the indoor space SI of the building H, and exchanges heat between the outside air OA serving as the supply air SA and the return air RA serving as the exhaust air EA while ventilating the indoor space SI.

The pipes 21 to 24 are a return gas pipe 21, an exhaust gas pipe 22, an outside air introduction pipe 23, and a gas supply pipe 24.

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

The casing 50 houses the heat exchange element 40, the air supply fan 26, the exhaust fan 28, and the like therein. The housing 50 is formed with a first opening 51 connected to the return air duct 21, a second opening 52 connected to the exhaust air duct 22, a third opening 53 connected to the outside air introduction duct 23, and a fourth opening 54 connected to the air supply duct 24.

Inside the housing 50 there is 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, a third space 53a between the third opening 53 and the heat exchange element 40, and a fourth space 54a between the fourth opening 54 and the heat exchange element 40.

The air supply fan 26 is disposed in the fourth space 54a and has an air supply fan motor 26m. The exhaust fan 28 is disposed in the second space 52a and has an 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 in the ceiling of the indoor space SI, and forms a return air path 21a through which the return air RA flows.

The exhaust duct 22 connects the second opening 52 of the second ventilator 20 and the second exhaust port 82 opened in the outer wall of the building H, and forms an exhaust passage 22a through which the exhaust gas EA flows.

The outside air introduction duct 23 connects the third opening 53 of the second ventilator 20 and the outside air introduction port 83 opened in the outer wall of the building H, and forms 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 conditioning indoor unit 30, and forms an air supply path 24a through which the supply air SA flows. The air supply duct 24 is divided into two and connected to 2 inlets 33. By dividing into two, the air passage area 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 implemented by a computer. The ventilation control unit 70 includes a control arithmetic device and a storage device. The control arithmetic device may use a processor such as a CPU or GPU. The control arithmetic device reads out the program stored in the storage device, and performs predetermined image processing or arithmetic processing according to the program. Further, the control arithmetic device can write the arithmetic result into the storage device or read out the 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 air discharge fan 28 in response to a command from a remote controller 90, which will be described later.

Although not shown and described here, an outside air temperature sensor and an indoor temperature sensor may be connected to the ventilation control unit 70, and the sensor values may be used for control.

(5) Details of remote controller

The remote controller 90 allows a user in the indoor space SI to perform various setting operations on the air conditioner indoor unit 30 and the second ventilator 20. The remote controller 90 is also realized by a computer similarly to the ventilation control unit 70.

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

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

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

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

(7) Method for selecting second ventilator additionally provided for increasing ventilation amount of indoor space and method for selecting indoor unit of air conditioner

As shown in fig. 1B, an increase in ventilation is required for an indoor space SI of a building H in which the first ventilator 10 and the air conditioning indoor unit 30 are installed, as one of measures against infection with pathogens such as viruses and bacteria. For example, assume that 20m per 1 person ³ The ventilation amount of the first ventilator 10 is determined by designing ventilation amount, but 10m is further required ³ /h, total 30m ³ Ventilation per hour. In other words, the current ventilation amount is required to be 1.5 times. In this case, the second ventilator 20 to be additionally provided is selected by the following steps.

(7-1) method of selecting a second ventilator

First, in the first step, the second ventilation amount required by the additionally provided second ventilator 20 is obtained based on the size of the indoor space SI. In the present embodiment, the first step includes a step of calculating the maximum number of people entering the indoor space SI and a step of calculating the ventilation amount required in the indoor space SI from the maximum number of people. Specifically, the ventilation amount required in the indoor space SI is a value as follows: floor area (m) of indoor space SI ² ) Divided by a specific area (m) per 1 person determined by the use of the indoor space SI (room) (general store, office building, etc.) ² ) And the resulting value is multiplied by the ventilation (m) per 1 person per 1 hour ³ /h). Specific area (m) per 1 person determined by use of the indoor space SI ² ) For example, 3m according to the application ² 、5m ² Etc. The volume (m ³ ) The necessary ventilation number of the room is calculated.

First ventilation (m) ³ /h) is for example the ventilation required for the indoor space SI based on the carbon dioxide discharge of the person. Second ventilation (m) ³ /h) is the ventilation per 1 hour required for the indoor space SI as a countermeasure against pathogen infection. The pathogens to be the target of the measures against infection are, for example, viruses or bacteria such as influenza virus, norovirus, coronavirus, tubercle bacillus, and the like. Second ventilation (m) ³ And/h) is greater than the first ventilation (m) ³ /h) large values.

Next, in the second step, the difference between the second ventilation and the first ventilation is obtained as the additional ventilation (m ³ /h). First ventilation (m) ³ /h) is the ventilation quantity of the first ventilation 10 which has been set for the indoor space SI.

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

(7-2) candidates V1 to V6 for ventilator

The candidate of the air interchanger is ventilation quantity 150m ³ Ventilation device V1 for/h, ventilation volume 250m ³ Ventilation device V2 for/h, ventilation volume 350m ³ Ventilation device V3 for/h, ventilation volume 500m ³ Ventilation device V4 of/h and ventilation quantity 650m ³ Ventilation device V5 for a ventilation system/h and ventilation volume 800m ³ And/h ventilation means V6.

(7-3) method for selecting indoor unit of air conditioner

After the second ventilator 20 in the third step is selected, 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 obtained as the total air conditioning load. The first air conditioning load is determined based on the size of the indoor space SI, and is obtained by summing up the heat load of the person or the equipment located in the room, the solar heat entering through the window or the wall, the heat load based on the difference between the inside and outside temperatures, and the like. Depending on the use of the indoor space SI (room) of the building H (general shops, office buildings, etc.), an air conditioning load (first air conditioning load) for cooling and heating per unit area is known. The second air conditioning load is an air conditioning load generated by ventilation of the existing first ventilation device 10. When ventilation is performed, outside air is taken into the indoor space SI through a duct, a gap between doors, or the like, and a load is generated to maintain the outside 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 an air conditioning load generated by ventilation of the second ventilator 20 selected in the third step.

In the fourth step, the third air conditioning load is determined taking into consideration the amount of heat exchange caused by 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 the air conditioning energy lost by ventilation, and in the fourth step, the recovery amount thereof is considered.

In the fifth step, the air conditioning indoor unit 30 having the air conditioning capacity capable of handling the total air conditioning load is selected from among the candidates of the plurality of air conditioning indoor units having different air conditioning capacities. Here, the air conditioning indoor unit 30 is selected from candidates A1 to A9 of the air conditioning indoor unit shown in the following (7-4).

(7-4) air conditioner indoor unit candidates A1 to A9

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

(7-5) selected reconsideration of the second ventilator and the indoor unit of the air conditioner

In the sixth step, it is determined whether or not the air volume at the time of the maximum ventilation volume of the second ventilator 20 selected in the third step is 30% or less of the rated air volume of the air-conditioning 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 ventilation of the second ventilator 20 exceeds 30% of the rated air volume of the air conditioning indoor unit 30, the selection of the second ventilator and the air conditioning indoor unit is reconsidered. In the selected reconsideration, the air conditioning indoor unit 30 is reselected from among candidates for air conditioning indoor units having a larger rated air volume, or the second ventilator 20 is reselected from among candidates for ventilators having a smaller maximum ventilation volume.

(7-6) selected specific examples

Next, a specific example of selection of the second ventilator 20 when the ventilation amount is increased and the second ventilator 20 is additionally installed in the indoor space SI of the building H in which the first ventilator 10 is installed will be described with reference to fig. 4A to 4C.

As shown in fig. 4A, it is assumed that an air conditioning indoor unit 30 having 5 horsepower (5 HP) and a ventilation amount of 500m are currently provided in, for example, an indoor space SI of a certain store ³ First ventilation means 10 of/h. Specific area (m ² ) In the case of a general store, 3m ² . Floor area in indoor space SI is 75m ² Stores with 25 persons in indoor space SI were previously occupied at 20m per 1 person ³ In the case of designing the ventilation amount per hour, the ventilation amount is set to be 500m ³ First ventilation means 10 of/h. In general shops, as an air conditioning indoor unit of 5 horsepower30.5 kW capable of floor area 83m ³ Is provided. On the other hand, the current ventilation is 500m ³ In the case of/h, 75m for the floor area of a typical store ² The air conditioning capacity required for the indoor space SI is 11.3kW. Thus, the floor area relative to the current indoor space SI is 75m ² The 5 horsepower air conditioning indoor unit 30 has about 10% of the remaining power.

The store is considered to increase the current ventilation (20 m per 1 person as a countermeasure against pathogen infection ³ /h), ensuring a total of 30m for indoor space SI ³ When the ventilation amount per hour (per 1 person) is ensured, a simple method is exemplified as a candidate for ventilation by windowing.

In the case of ventilation with a window, as shown in FIG. 4B, it is necessary to open the window and to open the window by 250m ³ The outdoor air/h is additionally taken into the indoor space SI. However, when the window is opened, problems such as an increase in noise, invasion of insects into the indoor space SI, and occurrence of temperature unevenness in the indoor space SI occur, and comfort to customers in the store is hindered. In addition, as an increase in the air conditioning load due to the introduction of the outside air, for example, when the outside air temperature is 35 ℃ and the indoor temperature is 27 ℃, the outside air load is increased by 1.5kW, and the floor area of the indoor space SI is 75m ² An air conditioning capacity of 12.8kW (=11.3kw+1.5kw) is required. On the other hand, since the air conditioning capacity (12.5 kW) of the conventional 5-horsepower air conditioning indoor unit 30 is insufficient, the 5-horsepower air conditioning indoor unit 30 must be removed from the store in which the ventilation is performed, and the 6-horsepower (14.0 kW) air conditioning indoor unit must be newly installed.

On the other hand, as ensuring the total of 30m for the indoor space SI ³ By adopting the above-described selected methods (7-1) to (7-5), the ventilation amount of the indoor space SI can be ensured and the air conditioning load can be handled while suppressing the initial cost and the running cost.

Using the above-described selection method, first, in step 1, according to the size of the indoor space SI (floor area 75m ² And a number of accommodated persons of 25), and a first step required for the indoor space SI as a countermeasure against pathogen infection is obtainedAnd (3) secondary ventilation. As a countermeasure against pathogen infection, 30m is required for every 1 person ³ /h, second ventilation as 750m ³ /h(25×30m ³ And/h) obtaining.

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

Next, in the third step, a ventilator capable of ventilation with additional ventilation is selected from among the ventilator candidates V1 to V6, and this is selected as the second ventilator 20. Here, the ventilation is 250m ³ The ventilation device V2 of/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 obtained as the total air conditioning load. As described above, the second air conditioning load is an air conditioning load generated by ventilation of the conventional first ventilator 10. Ventilation by the conventional first ventilator 10 (ventilation volume 500m ³ (h) the total floor area of the generated second air conditioning load and first air conditioning load in the general store is 75m ² In the case of the indoor space SI, the above-described 11.3kW is obtained. The third air conditioning load is an additional air conditioning load associated with the ventilation operation of the second ventilator 20, which is generated by the additional installation of the second ventilator 20. The ventilation device selected as the second ventilation device 20 is 250m ventilation ³ In the case of the ventilator V2 of/h, the additional air conditioning load (third air conditioning load) was 0.6kW when the outside air temperature was 35 ℃ and the indoor temperature was 27 ℃. In the case of the above-described ventilation by opening the window, the air conditioning load was set to be 1.5kW under the same conditions, but in the case of using the second ventilator 20, the total heat exchange in the heat exchange element 40 was performed, and thus the additional air conditioning load was set to be 0.6kW. Therefore, the total air conditioning load was 11.9kW (11.3kw+0.6kw).

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

Next, in a fifth step, an air conditioning indoor unit 30 having an air conditioning capability capable of handling the total air conditioning load is selected from among the candidates A1 to A9 of the air conditioning indoor units. Here, the 5 horsepower (12.5 kW) air conditioning indoor unit A8 that has been set 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 horse force (12.5 kW).

Next, in the sixth step, it is determined whether or not the air volume at the time of the maximum ventilation volume of the second ventilator 20 selected in the third step is 30% or less of the rated air volume of the air-conditioning indoor unit 30 selected in the fifth step. Here, the air volume at the time of maximum ventilation of the second ventilator 20 is 30% or less of the rated air volume of the air conditioning indoor unit 30. Therefore, the second ventilator and the air conditioning indoor unit in the seventh step are not newly considered.

As described above, here, as shown in fig. 4C, the second ventilator 20 having the heat exchange element 40 for performing total heat exchange is additionally provided, and the air conditioning ventilation system 100 is constituted by the second ventilator 20 and the conventional 5-horsepower air conditioning indoor unit 30.

In addition, as described above, when the windowed ventilation is adopted as a countermeasure against pathogen infection, it is necessary to remove the 5-horsepower air conditioning indoor unit 30 and to newly set the 6-horsepower (14.0 kW) air conditioning indoor unit, but when the second ventilation device 20 having the heat exchange element 40 for performing total heat exchange is additionally provided, the conventional 5-horsepower air conditioning indoor unit 30 can be directly continued to be used.

(8) Features of the second ventilator selection method

(8-1)

According to the method for selecting the second ventilator described in (7), the second ventilator 20 is selected according to the excellent idea that ventilation is not conventionally performed by directly using the first ventilation amount of the conventional first ventilator 10 and supplementing the insufficient additional ventilation amount by the second ventilator 20. Thus, ventilation of the second ventilation amount required as a countermeasure against pathogen infection can be realized while suppressing costs.

(8-2)

In addition to the conventional first ventilator 10, if an additional second ventilator 20 is provided for the indoor space SI, it is assumed that the ventilation of the second ventilator 20 increases the air conditioning load of the indoor space SI. If this is not considered, the warm environment of the indoor space SI may deteriorate. In view of this, in the above-described method for selecting the second ventilator 20 and the air conditioning indoor unit 30, the air conditioning indoor unit 30 capable of processing the total air conditioning load including the air conditioning load generated by ventilation is selected. This makes it possible to judge: whether the air conditioning indoor unit 30 already provided in the indoor space SI can be directly used or a new air conditioning indoor unit 30 having higher air conditioning capability needs to be replaced.

(8-3)

In the method for selecting the second ventilator described in (7), the second ventilator 20 having the heat exchange element 40 for exchanging heat between the supplied gas SA and the discharged gas EA is selected as an additional ventilator. Therefore, deterioration of the warm environment of the indoor space SI due to ventilation by the second ventilator 20 can be suppressed to be small. Further, since the third air conditioning load (the air conditioning load accompanying the 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. Thus, the required air conditioning capacity is accurately identified, and the air conditioning indoor unit 30 is selected without excess or deficiency.

(8-4)

If the air volume at the time of the maximum ventilation 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, the operation efficiency of the air conditioning apparatus may be deteriorated and the operation cost may be high even if the total air conditioning load can be handled by the air conditioning capacity of the air conditioning indoor unit 30. In view of this, in the method for selecting the second ventilator and the air conditioning indoor unit according to the present embodiment, the sixth step and the seventh step are performed, and the selection of the second ventilator and the air conditioning indoor unit is reconsidered. Thus, for example, an air conditioning indoor unit having a higher rated air volume and air conditioning capacity can be selected, and the running cost of air conditioning and ventilation can be reduced.

(8-5)

In the above embodiment, by preparing the candidates for the plurality of air conditioning indoor units shown in the above (7-4), a more appropriate air conditioning indoor unit 30 can be selected according to the selected second ventilator 20. This can suppress the running cost and installation cost of the air conditioning ventilation system 100.

(9) Deformation and features of air conditioning ventilation system

(9-1)

In the air conditioning ventilation system 100 of the above-described (1) to (6), the case where the air conditioning indoor unit 30 is an already installed device has been described, but as the air conditioning ventilation system 100, the second ventilation device 20, the air conditioning indoor unit 30, and the ducts 21 to 24 such as the air supply duct 24 forming the flow path of the supply air SA may be packaged. When the fan of the second ventilator 20 is operated at a predetermined rotational speed, the ducts 21 to 24 connected to the second ventilator so that the amount of air supplied into the room becomes the target ventilation air amount, and a supply gas intake member 30a described later are configured to have a constant flow path resistance. The encapsulation means a system as follows: the desired flow path resistance can be generated only by connecting the ducts 21 to 24 having the flow path resistance and the supply gas intake member 30a to the air conditioning indoor unit 30 and the second ventilator 20, and as a result, the target ventilation air volume can be supplied without calculating the flow path resistance on site. If the packaged air conditioning ventilation system 100 is used, the cost of introduction including the cost of installation engineering can be suppressed as compared with a case where the ventilation device and the indoor unit of the air conditioning device are connected using components such as a pipe purchased in the field.

(9-2)

In the air-conditioning ventilation system 100, the supply gas SA from the second ventilator 20 enters the air-conditioning indoor unit 30, and therefore, the temperature of the supply gas SA can be adjusted by the air-conditioning indoor unit 30, and the supply gas SA can be supplied to the indoor space SI after the temperature or humidity is adjusted.

(9-3)

The air conditioning ventilation system 100 includes a remote controller 90 that controls the air conditioning indoor unit 30 and the second ventilator 20. This allows the operation/stop of the second ventilator 20 and the air conditioning indoor unit 30 to be linked, or allows the second ventilator 20 to be controlled not to perform ventilation when the air conditioning indoor unit 30 is not operating.

In the air-conditioning ventilation system 100, if the ventilation of the second ventilation device 20 is performed when the air-conditioning indoor unit 30 is not operating, there is a possibility that dust adhering to the suction filter of the air-conditioning indoor unit 30 falls down to the indoor space SI. This problem can be prevented by providing the remote controller 90 and controlling the air conditioning indoor unit 30 and the second ventilator 20 in a linked manner.

(10) Specific examples of air-conditioning ventilation systems

(10-1)

In the specific example selected for the second ventilator of (7-6), the following will be described: suppose that the indoor space SI (floor area 75 m) ² ) Air conditioning indoor unit 30 provided with 5 horse power (5 HP) and ventilation volume of 500m ³ First ventilation device 10 of/h, as countermeasure for pathogen infection, increases the current ventilation (20 m per 1 person ³ /h) ensuring a total of 30m per 1 person for the indoor space SI ³ Ventilation per hour.

When selected by the same idea as in this specific example, the floor area is set to 70m ² Above and 95m ² The following air conditioning ventilation system for an indoor space is preferably provided with: an air conditioning indoor unit having a rated cooling capacity of about 12.5kW; and a second ventilator having a maximum ventilation of 250m ³ /h。

If the air conditioning ventilation system is installed in an indoor space of a conventional building where the floor area of the first ventilation (for example, ventilation 2 times the maximum ventilation of the second ventilation device) is secured, the ventilation required for 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 ventilation can be handled by the air conditioning device.

(10-2)

In the specific example of the second ventilator of the above (7-6), the following will be described: suppose that the indoor space SI (floor area 75 m) ² ) Air conditioning indoor unit 30 provided with 5 horse power (5 HP) and ventilation volume of 500m ³ First ventilation device 10 of/h, as countermeasure for pathogen infection, increases the current ventilation (20 m per 1 person ³ /h) ensuring a total of 30m per 1 person for the indoor space SI ³ Ventilation per hour.

When selected by the same idea as in this specific example, the floor area is set to 40m ² Above and 60m ² The following air conditioning ventilation system for an indoor space is preferably provided with: an air conditioning indoor unit having a refrigeration rating of about 7.1kW; and a second ventilator having a maximum ventilation of 150m ³ /h。

(11) Modification examples

(11-1)

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

Therefore, when the pressure loss of the supplied gas SA becomes considerable, it is preferable to additionally provide the air conditioning ventilation system 100 with a pressure adjusting unit.

For example, as the pressure adjusting portion, a pressure reducing member 58 such as a damper or a damper is provided in the first space 51A of the second ventilator 20 in fig. 1A, and the flow path resistances of the return gas RA and the exhaust gas EA are increased. Accordingly, the pressure difference is reduced, and the heat exchange element 40 hardly causes a problem in that the external air and the return air are mixed.

(11-2)

While the embodiments of the present invention have been described above, it should be understood that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as set forth in the following claims.

Description of the reference numerals

10 first ventilating device

20 second ventilator (ventilator, additional ventilator)

24 air supply path forming member

24a air supply path

26 air supply fan

28 exhaust fan

30 air-conditioner indoor set (air-conditioner)

30a supplied gas intake member

33 inlet of gas intake member (gas supply port)

40 heat exchange element

50 outer casing

51 first opening

52 second opening

53 third opening

54 fourth opening

58 decompression parts (pressure adjusting part)

90 remote controller (controller)

100 air conditioner ventilation system

EA exhaust gas

OA outside air

RA return gas

SA feed gas

SI indoor space

SO outdoor space (indoor space outside)

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2005-300112

Claims

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.