JP2001317772A - Air conditioning system for stores - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the energy of an air conditioning system keeping the cleanliness of air inside a store in the system for the stores. SOLUTION: The air conditioning system is arranged with an outside air processing filter 3 for removing dust in outside air, an air supply fan 12 for supplying the outside air into the inside of the store through the outside air processing filter 3, an exhaust fan 13 for exhausting the air inside the store to the outside of the store, a differential pressure sensor DP for detecting the differential pressure between the pressures of the inside and the outside of the store, an air supply flow controller CNT1 for controlling the air flow to keep the differential pressure detected by the differential pressure sensor DP at the predetermined value of 0 or higher, an auxiliary blower fan 15 arranged at the ceiling near an entrance door for blowing the taken in air inside the store into the outside of the room through the entrance door, and an auxiliary blower fan controller HOJ1 for operating the auxiliary blower fan 15 for predetermined time when a human body detecting sensor 16 arranged at the upper part of the entrance door detects the approach of a person. As a result, the intrusion of the outer air into the inside of the store can be prevented, the cleanliness of the air inside the store can be maintained and the energy can be saved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system for a store for cooling and heating the inside of a store, and more particularly, to supplying clean air to the inside of the store, and to the inside of the store where the outside air is dirty when the door is opened. The present invention relates to a store air-conditioning system that can keep air in a store clean by preventing intrusion of air, and can save energy.

[0002]

2. Description of the Related Art In recent years, there has been a strong demand for air conditioning systems for stores to improve the cleanliness of air in stores from the viewpoint of ensuring hygiene of foods displayed in stores. A conventional air conditioning system for a store is disclosed in JP-A-10-31555.
Is disclosed in Japanese Patent Publication No.

Hereinafter, the above-mentioned conventional air conditioning system for a store will be described with reference to the drawings.

FIG. 4 is a schematic diagram of a conventional store air conditioning system. As shown in FIG. 4, in a conventional store air conditioning system, as shown in FIG. 4, in a store 1 surrounded by a wall, an outside air processing filter 3, an air supply duct 5, an air inlet 6, an air conditioner 7, exhaust outlets 9a, 9b, and exhaust air. It is composed of ducts 10a and 10b and an in-store suction port 11.

The operation of the store air-conditioning system configured as described above will be described below.

Air conditioning in the store is performed by an air conditioner 7. The air conditioner 7 is configured by connecting an indoor unit 7a installed in a store and an outdoor unit 7b installed outside the store via a refrigerant pipe 8. After the outside air taken in from the outside air intake 4 is subjected to removal of dust in the air by the outside air treatment filter 3,
The air is guided to the indoor unit 7a through the air supply duct 5. Then, in the indoor unit 7a, the outside air from which dust has been removed and the in-store air sucked from the indoor suction port 11 are mixed and then heated or cooled and supplied into the store from the air supply port 6. On the other hand, part of the air in the store is exhausted by the exhaust ports 9a and 9b and the exhaust duct 1
It is discharged to the outside of the store through 0a and 10b.

At this time, the inside of the store is maintained at a positive pressure with respect to the outside of the store by controlling the blowing capacity of the air conditioner 7 so that the amount of outside air taken into the store 1 is larger than the amount of exhaust air. . Therefore, even if the door 2 is opened, dust in the outside air does not enter the store, and the air in the store can be kept clean.

[0008]

However, in the above-mentioned conventional configuration, when the door 2 is opened, the air inside the store is not opened.
However, since the door 2 has a large opening area, the air pressure inside and outside the store immediately becomes uniform (the differential pressure between inside and outside the store is 0). Conversely, if the inside of the store is to be maintained at a positive pressure against the outside of the store while the door 2 is open,
A large amount of air needs to be supplied by the blower of the air conditioner 7, which leads to an increase in the air-conditioning load of the outside air.
Has the disadvantage of increasing the power energy required for the operation of the vehicle.

An object of the present invention is to solve the conventional problem, and an object of the present invention is to provide an air-conditioning system for a store which can maintain air cleanliness in the store and save energy.

Further, the above-mentioned conventional configuration does not consider the influence of the wind speed of the outside air on the air cleanliness in the store. Normal,
When the wind speed of the outside air is high (the wind is strong), the outside air easily enters the store when the door is opened. On the other hand, when the wind speed of the outside air is low (weak wind), it is difficult for the outside air to enter the store when the door is opened. Regardless of the wind speed of the outside air, since the differential pressure inside and outside the store is uniquely fixed, it is not possible to prevent intrusion of the outside air when the wind speed of the outside air is high, or when the wind speed of the outside air is low. In order to maintain the differential pressure between the inside and outside of the store, the air supply is performed in a larger amount than necessary, so that there is a disadvantage that the power energy required for the operation of the air conditioner 7 is increased.

Another object of the present invention is to provide an air-conditioning system for a store which can maintain the air cleanliness in the store with a minimum supply of air according to the wind speed of the outside air and can save energy at the same time. is there.

Further, it is considered that it is necessary to prevent the outside air from entering the store through the door 2 as the outside air becomes heavier (the dust concentration in the air is higher). Since the differential pressure inside and outside the store is uniquely fixed regardless of the degree of dirt (dust concentration) of the outside air, when the dust concentration of the outside air is high, the outside air enters the store and the air cleanliness inside the store is impaired. Is more likely to be On the other hand, when the dust concentration of the outside air is low, even if the outside air enters, even though the influence on the air cleanliness inside the store is small, an excessively large amount of air supply is needed to maintain the pressure difference inside and outside the store. Therefore, there is a drawback that the power energy required for operating the air conditioner 7 is increased.

Another object of the present invention is to provide an air conditioning system for a store which can maintain the air cleanliness in the store with a minimum required air supply and save energy according to the degree of contamination of the outside air (dust concentration). It is to provide.

[0014]

In order to achieve this object, the present invention provides an air conditioner for air-conditioning the inside of a store, an outside air treatment filter for removing dust from outside air, and an outside air treatment filter through the outside air treatment filter. An air supply fan to supply inside the store,
An exhaust fan that discharges air inside the store to the outside of the store and a differential pressure sensor that detects a differential pressure inside and outside the store are installed, and the outside air is set so that the differential pressure detected by the differential pressure sensor becomes a predetermined value of 0 or more. An auxiliary air blower is provided on the ceiling near the door, equipped with an air supply control device for controlling the intake air flow (hereinafter referred to as air supply flow), and blowing out the in-store air that has been drawn in through the entrance door to the outside. An auxiliary blower control device for operating the auxiliary blower for a predetermined time when a human body detection sensor installed above the door detects that a person has approached the door is provided.

[0015] Thus, when the door is opened and closed, the auxiliary blower generates a wind from the store to the outside of the store,
Even if the differential pressure between inside and outside the store is small, it is possible to prevent outside air from entering the inside of the store, and it is possible to maintain air cleanliness in the store and at the same time to save energy.

Further, according to the present invention, there is provided a wind speed sensor for detecting a wind speed of the outside air, wherein when the wind speed detected by the wind speed sensor is large, the air volume of the auxiliary blower is large, and when the wind speed detected by the wind speed sensor is small. Has a second auxiliary blower control device for controlling the air volume of the auxiliary blower to be small.

[0017] Thus, according to the wind speed of the outside air, it is possible to maintain the air cleanliness in the store with the minimum required air supply and at the same time to save energy.

Further, the present invention provides a dust sensor for detecting the dust concentration in the outside air, and when the dust concentration detected by the dust sensor is high, the air volume of the auxiliary blower is increased.
When the dust concentration detected by the dust sensor is low, a third auxiliary blower control device that controls the air volume of the auxiliary blower to be small is provided.

Accordingly, the degree of contamination of the outside air (dust concentration)
Accordingly, it is possible to maintain the air cleanliness in the store with the minimum necessary air supply and at the same time to save energy.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to an air conditioner for air-conditioning the inside of a store, an outside air treatment filter for removing dust in outside air, and an outside air through the outside air treatment filter. An air supply fan that supplies the inside of the store, an exhaust fan that exhausts the air inside the store to the outside of the store, and a differential pressure sensor that detects the differential pressure inside and outside the store are installed, and the differential pressure detected by the differential pressure sensor is An auxiliary air blower is provided at the ceiling near the door, which is provided with an air supply control device that controls the air supply amount to be a predetermined value of 0 or more, and that blows out the in-store air taken in through the entrance door to the outside of the room. An auxiliary blower control device that operates the auxiliary blower for a predetermined time when a human body detection sensor installed at the upper part of the door detects that a person has approached the door is provided. The outside air is inside the store even if it is small It can be prevented from entering, an effect that can simultaneously hold the air cleanliness in the store saving energy.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, a wind speed sensor for detecting a wind speed of the outside air is further provided, and when the wind speed detected by the wind speed sensor is high, an auxiliary blower is provided. A second auxiliary blower control device for controlling the air flow of the auxiliary blower to be small when the air flow is large and the wind speed detected by the wind speed sensor is small, and the minimum necessary air supply is provided according to the wind speed of the outside air Has the effect of maintaining air cleanliness in the store and at the same time saving energy.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a dust sensor for detecting a dust concentration in the outside air is installed, and the dust concentration detected by the dust sensor is high. Is equipped with a third auxiliary blower control device for controlling the air flow of the auxiliary blower to be large, and when the dust concentration detected by the dust sensor is low, to reduce the air flow of the auxiliary blower. According to (1), it is possible to maintain the air cleanliness in the store with the minimum necessary air supply and at the same time to save energy.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a store air conditioning system according to the present invention will be described below with reference to the drawings. In addition,
The same reference numerals are given to the same components as those in the related art, and the detailed description is omitted.

(Embodiment 1) FIG. 1 is a schematic diagram of a store air-conditioning system according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 1 denotes a store whose wall is surrounded by a wall, on which a door 2 for entering and exiting is installed. The outside air taken in from the outside air intake 4 is supplied to the air supply duct 5,
The air is supplied to the outside air processing filter 3 through the air supply fan 12, where the dust in the air is removed, and then the air is supplied into the store from the air supply port 6. The air in the store sucked from the outlet 9 is discharged to the outside of the store via the exhaust fan 13 and the exhaust duct 10.

Normally, an air supply fan 12, an exhaust fan 13,
Devices such as the air supply duct 5 and the exhaust duct 10 are often installed in the space above the ceiling. Air conditioning in the store is performed by an air conditioner 7. The air conditioner 7 is configured by connecting an indoor unit 7a installed in a store and an outdoor unit 7b installed outside the store by a refrigerant pipe 8. As the form of the indoor unit 7a, a cassette type installed on a ceiling surface, a floor-standing type installed on a floor surface, a duct concealed type installed behind a ceiling, and the like are mainly used.

DP is a differential pressure sensor, and the differential pressure sensor DP is connected to the inside of the store and the differential pressure sensor DP is connected to the outside of the store by the pressure extraction pipe 14 to detect the differential pressure inside and outside the store. The CNT 1 takes in outside air to the air supply fan 12 such that the differential pressure inside and outside the store detected by the differential pressure sensor DP becomes a predetermined value of 0 or more (that is, the inside of the store is a positive pressure or equivalent to the outside of the store). This is an air supply amount control device that controls the air volume (air supply amount).

Here, the air supply amount can be controlled by a method in which an inverter is installed in the air supply fan 12 to change the rotation speed of the fan, or a damper is installed in the air supply duct 5 and its opening degree is adjusted. There is a method to adjust.

Specifically, when the pressure difference between the inside and outside of the store is smaller than a predetermined value, a request to increase the air supply amount from the air supply amount control device CNT1 to the air supply fan 12 (increase in the fan speed) Or the damper opening is increased). When the pressure difference between the inside and outside of the store is larger than a predetermined value, the air supply amount control device CNT1 requests the air supply fan 12 to reduce the air supply amount (reduction of the fan speed or reduction of the damper opening). ) Is made.

When the air supply fan 12 is operated for a long time, the outside air processing filter 3 is clogged and the amount of air supply is reduced, so that the differential pressure inside and outside the store becomes small, and furthermore, the inside of the store becomes negative pressure, and the outside air is reduced. There is a possibility that the air enters the store and the cleanliness of the store is reduced.

Therefore, by controlling the air supply amount so that the pressure difference between the inside and outside of the store becomes a predetermined value equal to or greater than 0, it is possible to always prevent outside air from entering the inside of the store and to improve the air cleanliness inside the store. It can be retained. Reference numeral 15 denotes an auxiliary blower, which is installed on the ceiling near the door 2 in the store so as to blow out the in-store air taken in through the door 2 to the outside of the store.

Reference numeral 16 denotes a human body detection sensor which detects that a person has approached the door 2. HOJ1 is an auxiliary blower control device.
Is detected, that is, when the door 2 is opened and closed, the auxiliary blower 15 is operated for a predetermined time.

As described above, by operating the auxiliary blower 15 in accordance with the opening and closing of the door 2 to temporarily generate the wind from the inside of the store to the outside of the store, the differential pressure inside and outside the store is reduced or reduced to zero. That is, it is possible to prevent dirty outside air from entering the store through the door 2 with a small air supply amount, and to maintain the air cleanliness in the store and save energy.

As described above, the store air conditioning system of this embodiment removes dust in the outside air with the outside air treatment filter 3 and supplies clean air to the store. When the human body detection sensor 16 detects that a person has approached the door 2, the auxiliary blower 15 is operated for a predetermined time to generate wind from the store to the outside of the store. It is possible to prevent the outside air from directly entering the store with a small air supply amount and lowering the air cleanliness in the store. Therefore, it is possible to save energy while maintaining the air cleanliness in the store.

(Embodiment 2) FIG. 2 is a schematic diagram of a store air conditioning system according to Embodiment 2 of the present invention.

In this embodiment, in the air conditioning system for a store according to the first embodiment, the wind speed sensor 17 for detecting the wind speed of the outside air, and when the wind speed detected by the wind speed sensor 17 is high, the air volume of the auxiliary blower 15 is increased. Sensor 17
If the wind speed detected in step (1) is low, a second auxiliary blower control device HOJ2 for controlling the air flow of the auxiliary blower 15 to be small is provided.

As described above, the auxiliary blower 15 is operated in accordance with the opening and closing of the door 2 to temporarily generate the wind from the inside of the store toward the outside, thereby reducing the differential pressure inside and outside the store to zero or zero. That is, it is possible to prevent dirty outside air from entering the store through the door 2 with a small air supply amount.

In addition, when the wind speed of the outside air is high (the wind is strong), the outside air easily enters the store when the door 2 is opened. On the other hand, when the wind speed of the outside air is low (the wind is weak), when the door 2 is opened, the outside air does not easily enter the store. By operating while controlling the air volume of the auxiliary blower 15 in consideration of the influence of the wind speed of the outside air on the air cleanliness in the store, the inside of the store can be supplied with the minimum required air supply according to the wind speed of the outside air. The air cleanliness can be maintained and energy can be saved at the same time.

As described above, the store air conditioning system according to the present embodiment controls the air volume of the auxiliary blower 15 in accordance with the wind speed of the outside air to maintain the air cleanliness in the store with the minimum required air supply. At the same time, energy can be saved.

(Embodiment 3) FIG. 3 is a schematic diagram of a store air-conditioning system according to Embodiment 3 of the present invention.

In this embodiment, a dust sensor 18 for detecting the concentration of dust in the outside air is installed in the air conditioning system for a store according to the first or second embodiment.
In the case where the dust concentration detected by the above is high, the air volume of the auxiliary blower 15 is increased, and when the dust concentration detected by the dust sensor 18 is low, the air volume of the auxiliary air blower 15 is controlled to be small.
An auxiliary blower control device HOJ3 is provided.

As described above, the auxiliary blower 15 is operated in accordance with the opening and closing of the door 2 to temporarily generate the wind from the inside of the store to the outside of the store, thereby reducing the differential pressure between the inside and outside of the store to zero or zero. That is, it is possible to prevent dirty outside air from entering the store through the door 2 with a small air supply amount.

Further, it is considered that it is necessary to prevent the outside air from entering the store through the door 2 as the outside air becomes heavier (the dust concentration in the air is higher). By operating while controlling the air volume of the auxiliary blower 15 in consideration of the effect of the condition (dust concentration) on the cleanliness of the air in the store, the minimum supply of air is required according to the degree of contamination of the outside air (dust concentration). Energy can be saved while maintaining the air cleanliness in the store.

As described above, the store air conditioning system of the present embodiment controls the air volume of the auxiliary blower 15 in accordance with the degree of dirt (dust concentration) of the outside air, so that the air in the store can be supplied with the minimum necessary air supply. Energy conservation can be achieved while maintaining cleanliness.

[0045]

As described above, the first aspect of the present invention provides an air conditioner for air-conditioning the inside of a store, an outside air processing filter for removing dust in the outside air, and an outside air through the outside air processing filter. An air supply fan that supplies the inside of the store, an exhaust fan that exhausts the air inside the store to the outside of the store, and a differential pressure sensor that detects the differential pressure inside and outside the store are installed, and the differential pressure detected by the differential pressure sensor is An auxiliary air blower is provided at the ceiling near the door, which is provided with an air supply control device that controls the air supply amount to be a predetermined value of 0 or more, and that blows out the in-store air taken in through the entrance door to the outside of the room. An auxiliary blower control device for operating the auxiliary blower for a predetermined time when a human body detection sensor installed at the upper part of the door detects that a person has approached the door. Maintains air cleanliness That if it is possible at the same time saving energy.

Further, the invention described in claim 2 is the first invention.
In addition to the invention described in the above, a wind speed sensor for detecting the wind speed of the outside air is installed, when the wind speed detected by the wind speed sensor is large, the air volume of the auxiliary blower is large, and when the wind speed detected by the wind speed sensor is small, Is equipped with a second auxiliary blower control device that controls the air volume of the auxiliary blower to be small, thereby keeping the air cleanliness in the store with the minimum necessary air supply and saving energy according to the wind speed of the outside air. Can be planned.

Further, the invention according to claim 3 provides the invention according to claim 1.
Or, in addition to the invention according to claim 2, a dust sensor for detecting dust concentration in the outside air is installed, and when the dust concentration detected by the dust sensor is high, the air volume of the auxiliary blower is increased, and the dust sensor is used. When the detected dust concentration is low, a third auxiliary blower control device for controlling the air volume of the auxiliary blower to be small is provided, whereby the necessary minimum air supply is made according to the degree of contamination of the outside air (dust concentration). Thus, it is possible to maintain the air cleanliness in the store and at the same time to save energy.

[Brief description of the drawings]

FIG. 1 is a first embodiment of a store air conditioning system according to the present invention;
Schematic diagram of

FIG. 2 is a second embodiment of the air conditioning system for stores according to the present invention.
Schematic diagram of

FIG. 3 is a third embodiment of a store air conditioning system according to the present invention.
Schematic diagram of

FIG. 4 is a schematic diagram of a conventional air conditioning system for a store.

[Explanation of symbols]

 3 outside air processing filter 7a indoor unit 7b outdoor unit 12 air supply fan

Continuation of front page (72) Inventor Kazuhiko Marumoto 4-5-2-5 Takaida Motodori, Higashiosaka-shi, Osaka Matsushita Refrigeration Co., Ltd. F-term (reference) 3L056 BD01 BD04 BD07 BE01 BF06 3L060 AA03 AA08 CC09 CC11 CC13 CC19 DD08 EE27

Claims (3)

[Claims] 1. An air conditioner for air-conditioning the inside of a store, an outside air treatment filter for removing dust from outside air, an air supply fan for supplying outside air to the inside of the store via the outside air treatment filter, and an air inside the store. An exhaust fan that discharges air outside the store, and a differential pressure sensor that detects a differential pressure between the air pressure in the store and the outdoor air are installed so that the differential pressure detected by the differential pressure sensor becomes a predetermined value of 0 or more. An auxiliary air blower that includes an air supply amount control device that controls the air supply amount and that blows out in-store air that has been drawn into the outside of the room through an entrance door, is installed on the ceiling near the door, and a human body installed above the door A store air-conditioning system including an auxiliary blower control device that operates the auxiliary blower for a predetermined time when a detection sensor detects that a person has approached the door. 2. A wind speed sensor for detecting a wind speed of the outside air is provided. When the wind speed detected by the wind speed sensor is high, the air volume of the auxiliary blower is large, and when the wind speed detected by the wind speed sensor is low, the auxiliary air blower is provided. The air-conditioning system for a store according to claim 1, further comprising a second auxiliary blower control device that controls the amount of air to be reduced. 3. A dust sensor for detecting the concentration of dust in the outside air is installed. When the dust concentration detected by the dust sensor is high, the air volume of the auxiliary blower is large, and when the dust concentration detected by the dust sensor is low. 3. The air conditioning system for a store according to claim 1, further comprising a third auxiliary blower control device that controls the air volume of the auxiliary blower to be small.