JP2011133199A - Ventilating device for store - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To focus attention on the situation where in ventilation of a store such as a convenience store, the magnitude of load of an air conditioner and a food cooling apparatus within the store varies even between the same temperature difference of 5°C between indoor temperature and outdoor temperature, for example, between 5°C which is a difference between 15°C and 20°C and 5°C which is a difference between 20°C and 25°C, and to control air sending amount of a ventilation fan to achieve appropriate air sending amount considering the situation of the temperature difference at that time, so as to eliminate uneven temperature within the store, suppress the load of the air conditioner and suppress the load of refrigerant/freezing showcases within the store. <P>SOLUTION: A space under the roof connected to inside of the store constitutes an air exhaust duct, and ventilating holes leading to the air exhaust duct are provided at least in the ceiling within the store. The ventilation fan is mounted to the wall face of the upper part near a window of the store. A ratio between air exhaust amount via the air exhaust duct and air exhaust amount via the ventilation fan is controlled based on determination using at least room temperature within the store. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a ventilator for a store such as a convenience store.

  There is a system that calculates the difference between the indoor temperature and the outdoor temperature of each room when ventilating the building, preferentially exhausts from the room where the temperature difference is the smallest, and does not exceed the required ventilation volume of the entire building ( Patent Document 1).

  On the other hand, in stores such as convenience stores, the inside of the store is cooled or heated by an air conditioner, and a refrigerated showcase and / or a freezer showcase for storing food for sale is installed. However, the front of a store such as a convenience store is glassed so that the inside of the store can be seen from the outside, and the vicinity of the entrance of the store located on the front side of the store is glassed.

  For this reason, the front side of the store is easily affected by outside air depending on the time zone and season of the day, and heat intrusion into the store is large due to radiant heat and conduction heat, which is large depending on the season and time zone of the day. There is a difference. Further, in the vicinity of the ceiling in the store, the temperature rises due to air convection in the store and heat generated by a lighting fixture such as a fluorescent lamp attached to the ceiling. In particular, when the outside air temperature is high, the in-store temperature is further increased. For this reason, in order to remove the heat of the ceiling portion, generally, measures such as providing a ventilation fan near the lighting fixture are taken.

  Further, in the vicinity where the refrigerated showcase and / or the frozen showcase are installed, the temperature / humidity is low due to leaked cold air from the refrigerated showcase and / or the frozen showcase. Thus, when the temperature and humidity vary depending on the area in the store, it is difficult to say that the store is in a comfortable environment.

JP 2004-301349 A

  In the system of Patent Document 1, the priority order of ventilation is determined by the mere temperature difference between the indoor temperature and the outdoor temperature, and the ventilation amount is determined. However, as described above, in a store such as a convenience store, the outdoor air temperature is Depending on the situation, the load on the air conditioner and food cooling equipment in the store will differ. In this case, when considering the load of the air conditioner and the food cooling device in the store, even if the temperature difference between the indoor temperature and the outdoor temperature is the same temperature difference of 5 ° C., it will be shown in FIG. Thus, for example, the load size of the air conditioner and the food cooling device in the store differs between 5 ° C from 15 ° C to 20 ° C and 5 ° C from 20 ° C to 25 ° C.

 In view of these points, the present invention provides a temperature difference between an indoor temperature and an outdoor temperature as described above as an operation control of a ventilation fan installed to eliminate temperature and humidity unevenness in a store such as a convenience store. Even if the temperature difference is the same, by controlling the ventilation fan so that the amount of air blown in consideration of the situation inside and outside the store at that time, the temperature unevenness in the store is eliminated, and the air that becomes the load of the air conditioner in the store This ventilation is intended to suppress the load on the air conditioner and to suppress the load on the refrigerated showcase and / or the freezer showcase installed in the store.

  Further, the present invention saves energy by suppressing the load on the in-store air conditioner and suppressing the load on the refrigerated showcase and / or the refrigerated showcase in accordance with the Building Standard Law established for such stores. It shall be effective.

  The ventilator in the store according to the present invention is configured such that the back of the ceiling connected to the store is configured as an exhaust duct, and has a ventilation port that leads to the exhaust duct at least on the ceiling in the store, and is attached to the wall surface at the top of the store window. And a ratio between the exhaust amount through the exhaust duct and the exhaust amount through the exhaust fan is adjusted based on a determination using at least room temperature in the store.

  Further, the ventilator in the store of the present invention is configured such that the back of the ceiling connected to the store is configured as an exhaust duct, and includes at least a plurality of ventilation openings leading to the exhaust duct on the ceiling in the store, and at the upper part of the store window. A window ventilation fan attached to a wall surface and a ceiling ventilation fan attached to each of the ventilation openings, and based on a determination using at least room temperature in the store, the exhaust amount by the ceiling ventilation fan and the exhaust amount by the window ventilation fan The ratio is adjusted.

  Furthermore, the determination includes at least an outside air temperature, a temperature near the window, and a temperature on the ceiling side.

  According to the present invention, temperature unevenness in a store such as a convenience store is eliminated, the load on the store air conditioner is suppressed, and the load on the refrigerated showcase and / or the freezer showcase installed in the store is suppressed. be able to.

It is a side view which shows schematic structure of the convenience store provided with the ventilation apparatus in the shop which concerns on this invention. It is a figure which shows the relationship of the power consumption with respect to the external temperature of the store air conditioner which concerns on this invention with a graph. It is a related figure of the calculated value based on the relationship between the outdoor temperature for every season in the store which concerns on this invention, the window side, and the temperature of a ceiling, and store preset temperature. It is a control flowchart of each ventilation fan which concerns on this invention. It is a block diagram of a control device which controls operation of each ventilation fan concerning the present invention. It is explanatory drawing of the structure which provided the damper apparatus in the suction inlet side of each ventilation fan which concerns on this invention. It is a block diagram of a control device which controls each damper device concerning the present invention. It is a figure which shows one measurement data, such as the temperature of each part in the summer, an intermediate period, and winter, the amount of solar radiation, and illumination load about the store inside and outside environment which concerns on this invention. It is a figure which shows the ventilation fan control window ratio and ventilation fan control ceiling ratio which were computed according to the thermal load for the operation control of each ventilation fan which concerns on this invention. It is a figure which shows the relational expression of the window-side temperature and window solar radiation amount in the summer when the window of the store which concerns on this invention turned to the northeast.

  The ventilator in the store according to the present invention is configured such that the back of the ceiling connected to the store is configured as an exhaust duct, and has a ventilation port that leads to the exhaust duct at least on the ceiling in the store, and is attached to the wall surface at the top of the store window. And a ratio between the exhaust amount through the exhaust duct and the exhaust amount through the exhaust fan is adjusted based on a determination using at least room temperature in the store.

First, an embodiment of a ventilator in a store according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a schematic configuration of a convenience store 1 equipped with an in-store ventilation device according to the present invention. It consists of walls. On the front side 2, although not shown, an entrance / exit (not shown) is formed by a glass door. In addition, an air conditioner 5 for performing air conditioning in the store 4 is installed outside the store on the back side 3, and the store 4 is maintained at a predetermined temperature (referred to as a set temperature). Thus, the air conditioner 5 is controlled to be cooled or heated. In the store 4, a refrigerated showcase and / or a frozen showcase (hereinafter referred to as a showcase 6) for storing sold foods are installed, and a display shelf (not shown) for sold products is further installed.

  In this invention, it is the structure which utilizes the ceiling back 7 formed in the upper part of the ceiling 9 of the shop 1 as the exhaust duct 8 (it is also called the ventilation duct 8). The exhaust duct 8 may be configured by the ceiling back 7 itself, but the exhaust duct 8 specially formed in a shape such as a rectangular cross section or a circular shape may be disposed in the ceiling back 7. A lighting fixture 18 such as a fluorescent lamp is attached to the ceiling 9 of the store 1, and ventilation openings 8 A, 8 B, 8 C that guide heat generated by the lighting fixture 18 to the exhaust duct 8 are formed at intervals on the ceiling 9. ing.

  In order to exhaust the air in the store (ventilation), a window ventilation fan 10 is attached to the wall surface at the top of the window on the front side 2 and the vents 8A, 8B, 8C Are attached with ceiling ventilation fans 11A, 11B, and 11C, respectively. In order to measure the temperature at the window of the store 4 in the store 1, a window temperature measurement sensor 12 is provided, and in order to measure the outside air around the store 1, an outside air temperature measurement sensor 13 is provided. A ceiling temperature measurement sensor 14 is provided to measure the temperature of the ceiling 9 portion.

The Building Standard Law stipulates that if the volume of air in the store is 1, then half (0.5) must be ventilated in 1 hour. Therefore, if the store 500 m3 (500 meters ^3), next ventilation is 250 meters ³ in 1 hour, which is a ventilation of about 4.17M ³ in 1 min. Within the range of this standard, the present invention varies the air flow rate (ventilation amount) of each ventilation fan in accordance with the temperature conditions in the store, and discharges high-temperature air outside the store.

  Hereinafter, this method will be described. 3 (a), (b), (c), and (d) show the relationship between the calculated values based on the relationship between the outdoor temperature, the window, the ceiling temperature, and the set temperature in the store for each season in the store. Yes. 3 (a), (b), (c), and (d) show that the seasons are divided into summer, winter, and intermediate period, and the temperature inside and outside the store is measured during this season. 10. Ventilation amount (ventilation amount) by the ceiling ventilation fans 11A, 11B, and 11C is varied. The interior 4 of the store is kept at a predetermined temperature (referred to as a set temperature, which in the embodiment is 26.0 ° C. in the summer, 24.0 ° C. in the intermediate period, and 20.0 ° C. in the winter). It is controlled by the harmony device 5. For this reason, as shown in FIG. 3 (a), it is assumed that cooling is performed in the summer, heating is performed in the intermediate period, and heating is performed in the winter.

As shown in FIG. 2, for example, when the outside air temperature rises from 10 ° C. to 15 ° C. and 5 ° C. when it rises from 30 ° C. to 35 ° C., the air conditioner has the same temperature difference of 5 ° C. And the amount of increase in power consumption of food cooling equipment is different. Even in the store, when the temperature rises from 18 ° C to 20 ° C and when the temperature rises from 22 ° C to 24 ° C, even if the temperature difference is 2 ° C, the power consumption of the air conditioner and food cooling equipment will increase. The amount is different. Therefore, in the present invention, each ventilation fan is operated at a rate based on a value calculated by fitting to the relational expression between the outside air temperature and the power consumption, and the assumed power consumption y = 0.016x ² −0.2047 + 4.358. By doing so, temperature unevenness in the store is eliminated, the load on the store air conditioner is suppressed, and the load on the refrigerated showcase or the freezer showcase installed in the store is suppressed. Specific examples will be described below.

  First, control based on the difference from the outside air temperature will be described. As shown in FIG. 3 (b), in the summer season, the outside temperature measured by the outside temperature measuring sensor 13 is 31.1 ° C., the window temperature measured by the window temperature measuring sensor 12 is 24.0 ° C., and the ceiling temperature measurement. The temperature near the ceiling measured by the sensor 14 is 26.3 ° C. Based on this, the difference between the window temperature and the outside air temperature is 24.0 ° C.-31.1 ° C. = − 7.1 ° C., and the difference between the ceiling temperature and the outside air temperature is 26.3 ° C.-31.1 ° C. ° C = −4.8 ° C., and the ratio between the window and the ceiling at this temperature difference is 7.1 / 11.9 = 0.60 at the window and 4.8 / 11.9 = 0.40 at the ceiling. It becomes.

  As a result, in summer, the smaller value has a higher temperature, and this is the load on the store. Therefore, the calculated ratio is reversed and the ratio of the ventilation fan control window and the ventilation fan are shown in FIG. As shown as the control ceiling ratio, the window-side ventilation fan 10 is operated with an air flow rate of 40%, and the ceiling ventilation fans 11A, 11B, and 11C are operated with an air flow rate of 60%.

  In the winter and intermediate periods, the calculated values are calculated in the same manner as described above as shown in FIG. As a result, in winter (heating), the lower the value, the lower the temperature, so this is the load on the store, so the calculated ratio is reversed, and the ventilation fan control window is shown in FIG. As shown as the ratio and the ventilation fan control ceiling ratio, the window ventilation fan 10 is operated with an air flow rate of 52%, and the ceiling ventilation fans 11A, 11B, and 11C are operated with an air flow rate of 48%. In the intermediate period (heating), based on the calculated window-to-ceiling ratio, the window-side ventilation fan 10 is blown at 48% as shown in FIG. The ceiling ventilation fans 11A, 11B, and 11C are operated with an air flow rate of 52%.

  Next, control based on the difference from the set temperature will be described. As shown in FIG. 3C, in the summer season, the set temperature is 26.0 ° C., the window temperature measured by the window temperature measurement sensor 12 is 24.0 ° C., and the temperature near the ceiling measured by the ceiling temperature measurement sensor 14. Is 26.3 ° C. Based on this, the difference between the window temperature and the set temperature is 24.0 ° C.−26.0 ° C. = − 2.0 ° C., and the difference between the ceiling temperature and the set temperature is 26.3 ° C.−26.0 ° C = 0.3 ° C. The ratio of the window and the ceiling at this temperature difference is 2.0 / 2.3 = 0.87 at the window and 0.3 / 2.3 = 0.13 at the ceiling. Become.

  As a result, in summer, the smaller value has a higher temperature, and this is the load on the store. Therefore, the calculated ratio is reversed, and the ventilation fan control window ratio and the ventilation fan are shown in FIG. As shown as the control ceiling ratio, the window ventilation fan 10 is operated with the air flow rate of 0%, that is, is stopped, and the ceiling ventilation fans 11A, 11B, and 11C are operated with the air flow rate of 100%, that is, in the full rotation state. As a result, ventilation that satisfies the provisions of the Building Standards Act can be performed.

  In the winter season and the intermediate season, the calculated values are calculated as shown in FIG. As a result, in winter (heating), giving priority to the load on the store, as shown in FIG. 3 (c) as the ventilation fan control window ratio and the ventilation fan control ceiling ratio, the window ventilation fan 10 is sent at 100%. Operate with air volume (full rotation) and operate (stop) ceiling ventilation fans 11A, 11B, and 11C with 0% air flow. As a result, ventilation that satisfies the provisions of the Building Standards Act can be performed. In the intermediate period (heating), based on the calculated window-to-ceiling ratio, the window-side ventilation fan 10 is blown at 35% as shown in FIG. 3 (c) as the ventilation fan control window ratio and the ventilation fan control ceiling ratio. Operate and operate ceiling ventilation fans 11A, 11B, and 11C with an air flow rate of 65%.

Next, control based on the assumed power consumption will be described. As shown in FIG. 3 (d), the assumed power consumption at the window in the summer (referred to as the assumed power consumption in the window) and the assumed power consumption at the ceiling (referred to as the assumed power consumption in the ceiling) y are y = 0.016x. ² -0.2047 + 4.358 formula (x is the difference of the difference, and a ceiling temperature and the outside air temperature of the above window side temperature and the outside air temperature) is a value calculated by, shown in FIG. 3 (b) Thus, it is 6.1 [kwh / h] at the window and 7.0 [kwh / h] at the ceiling. And the ratio of the window side and the ceiling in this assumed power consumption is 6.1 / 13.1 = 0.47 at the window side, and 7.0 / 13.1 = 0.53 at the ceiling. Such calculation is performed by the control unit 15 shown in FIG.

  In summer (cooling), based on the window-to-ceiling ratio in the estimated power consumption calculated in this way, the window-side ventilation fan 10 is shown in FIG. 3 (d) as the ventilation fan control window ratio and the ventilation fan control ceiling ratio. 5 is controlled by the control unit 15 shown in FIG. 5 so that the ceiling ventilation fans 11A, 11B, and 11C are operated with an air flow rate of 53%. This control flow is shown in the flowchart of FIG.

  In the above, the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C are operated at a ratio based on the calculated estimated power consumption. For example, various environments of the store such as the number of people entering and leaving the store The window-side ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C may be operated at a ratio corrected by including factors including conditions.

  Control of the air flow rate of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C is performed by the controller 15 by the control unit 15 so that the window temperature measurement sensor 12, the outside air temperature measurement sensor 13, and the ceiling temperature are controlled. A continuous method may be used in which the measurement value of the measurement sensor 14 is input and the air flow rate of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C is controlled based on the same calculation as described above. The measurement values of the temperature measurement sensor 13 and the ceiling temperature measurement sensor 14 are input, and based on the same calculation as described above, the control unit 15 determines the air flow rate of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C at a predetermined interval. Any of the control methods may be used.

  In this way, the ratio of the amount of exhaust through the exhaust duct 8 and the amount of exhaust through the window ventilation fan 10 is adjusted by the control unit by the ceiling ventilation fans 11A, 11B, and 11C, and the ventilation amount in the store is It becomes the ventilation amount in the state of the reference value defined in the Building Standards Act, the reference value set in the Building Standards Act is cleared, and the load of the air conditioner for cooling and cooling in the store is suppressed, The load of the refrigerated showcase and / or the frozen showcase can be suppressed.

  In the present invention, there are several methods for controlling the rotational speed of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C. One method is inverter control. The frequency by the control unit 15 depends on the ventilation fan control window ratio and the ventilation fan control ceiling ratio calculated by the control unit 15 based on the measurements by the window temperature measurement sensor 12, the outside air temperature measurement sensor 13, and the ceiling temperature measurement sensor 14. This is a method in which the rotational speed of each ventilation fan is varied from high speed to low speed by control.

  As another method, the rotational speed of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C is controlled in stages. According to the ventilation fan control window ratio and the ventilation fan control ceiling ratio calculated by the control unit 15 based on the measurement of the window side temperature measurement sensor 12, the outside air temperature measurement sensor 13, and the ceiling temperature measurement sensor 14, the control unit 15 In this method, the rotational speeds of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C are controlled in three stages, for example, high speed, medium speed, and low speed.

  The above method is the rotation speed control of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C. However, the rotation speed of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C is constant, and as shown in FIG. Damper devices 16, 17A, 17B, and 17C are provided on the air suction sides of the ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C, respectively. It is also possible to control the opening degree of 16, 17A, 17B, 17C. In FIG. 5, the control device in this case is the damper device 16 instead of the window ventilation fan 10, the damper device 17A instead of the ceiling ventilation fan 11A, the damper device 17B instead of the ceiling ventilation fan 11B, and the ceiling ventilation fan 11C. The damper device 17C is assumed.

  Thereby, based on the measurement of the window side temperature measurement sensor 12, the outside air temperature measurement sensor 13, and the ceiling temperature measurement sensor 14, the control unit 15 performs according to the ventilation fan control window ratio and the ventilation fan control ceiling ratio calculated by the control unit 15. The opening degree of the damper devices 16, 17A, 17B, and 17C is varied. For this reason, the rotational speeds of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C are constant, but the opening amounts of the damper devices 16, 17A, 17B, and 17C change. change.

  In the above description, the number of the ceiling temperature measurement sensors 14 is one, but a plurality of ceiling temperature measurement sensors 14 may be provided so as to measure the temperature of the ceiling portions at a plurality of positions with intervals. For example, when there are three ceiling ventilation fans, the ceiling temperature measurement sensor 14A is provided for the ceiling ventilation fan 11A, the ceiling temperature measurement sensor 14B is provided for the ceiling ventilation fan 11B, and the ceiling temperature measurement sensor 14C is provided for the ceiling ventilation fan 11C. Is provided.

  The control device in this case is configured as shown in FIG. 7, and the ceiling ventilation fan 11A responds to the ventilation fan control window ratio and the ventilation fan control ceiling ratio calculated as shown in FIG. 3 based on the detection of the ceiling temperature measurement sensor 14A. Thus, the operation is controlled by the control unit 15. The ceiling ventilation fan 11B is controlled in accordance with the ventilation fan control window ratio and the ventilation fan control ceiling ratio calculated in the same manner based on the detection of the ceiling temperature measurement sensor 14B. The ceiling ventilation fan 11C is controlled by the ceiling temperature measurement sensor. If the operation is controlled in accordance with the ventilator fan control window ratio and the ventilator fan control ceiling ratio calculated in the same manner based on the detection of 14C, the high temperature ceiling 9 can be properly ventilated. It will be a thing.

  As another control method, a plurality of ceiling temperature measurement sensors 14 are provided so as to measure the temperature of a plurality of ceiling portions at intervals, and an average value of these measured values is calculated by the control unit 15. The control unit 15 can control the ceiling ventilation fans 11A, 11B, and 11C to operate at the same number of revolutions according to the ratio between the window and the ceiling in the assumed power consumption calculated based on this.

  As described above, the ventilator in the store 4 of the present invention is configured such that the store interior 4 and the ceiling back 7 connected to the store 4 are configured as the exhaust duct 8 and attached to the ceiling 9 of the store 4 at least. 18 is provided with a vent opening that guides the heat generated in the exhaust duct 8 to the exhaust duct 8, and a window vent fan 10 attached to the upper part of the window of the store 1, and measures the outside air temperature, the temperature at the window, and the temperature on the ceiling side, and controls the controller 15. Based on the determination, the air blow amount (discharge amount) by the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C is controlled.

  In the above, the sensors for measuring the temperature in the store 4 of the store 1 are at least the window temperature measuring sensor 12 and the ceiling temperature measuring sensor 14, but are not limited thereto, and in addition to this, the temperature of other parts of the store 4 For example, a sensor for measuring the temperature in the vicinity of the doorway may be provided.

  In the above, the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C are provided, and the sensors for measuring the temperature in the store 4 are at least the window temperature measurement sensor 12 and the ceiling temperature measurement sensor 14, but the control is simplified. In order to reduce the cost, a sensor for measuring the temperature in the store 4 is provided in any place in the store 4, and the ventilation openings 8A, 8B, 8C are not provided with the ceiling ventilation fans 11A, 11B, 11C. It is possible to use only a ventilation opening, and exhaust the air in the store 4 only by the window ventilation fan 10.

  Like the said Example, the ventilator in the store of this invention comprised the interior back of the store 4 and the ceiling back connected to this store 4 as the exhaust duct 8, and was attached to the ceiling 9 of the store 4 at least. 18 is provided with ventilation openings 8A, 8B, and 8C for guiding heat generation to the exhaust duct 8 and a window ventilation fan 10 attached to the upper part of the window of the store 1, and is determined by the control unit 15 using at least room temperature in the store 4. On the basis of the above, the ratio between the exhaust amount through the exhaust duct 8 and the exhaust amount through the window ventilation fan 10 is adjusted.

 In the present invention, as described above, in order to eliminate uneven temperature / humidity in the store 1 such as a convenience store, a ventilation fan is installed at an appropriate place in the store 4 (in the embodiment, the window ventilation fan 10 and the ceiling ventilation fan 11A). 11B and 11C), even if the temperature difference between the room temperature and the outdoor temperature is the same temperature difference as shown in FIG. By controlling the ventilation fan, temperature unevenness in the store 4 is eliminated, and the load of the air conditioner 5 in the store is suppressed, and the load of the air conditioner 5 is suppressed and the store 4 is installed in the store. The load on the refrigerated showcase 6 and / or the frozen showcase 6 can be suppressed.

  Further, the present invention can suppress the load on the in-store air conditioner 5 and reduce the load on the refrigerated showcase 6 and / or the refrigerated showcase 6 by operating the ventilation rate as stipulated in the Building Standard Law for such a store. Suppression can be performed and an energy saving effect can be achieved.

 3 (a), (b), (c), and (d) show only one value for each of the summer, intermediate period, and winter, but as shown in FIG. Based on the measured values of outside air temperature, set temperature, window-side temperature, and ceiling temperature, the ratio of ventilation fan control window and ventilation fan control ceiling ratio for each time is calculated by the same calculation as above, and this makes every month, every day In addition, if the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C are controlled for each time, fine control can be performed.

  In Example 1, the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C were operated at a ratio based on the calculated assumed power consumption. However, the operation ratios of the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C were calculated. As a determining factor, there is a method of using a heat load instead of the assumed power consumption. Example 2 is a system using this heat load, and will be described below.

  The temperature sensor is provided with a ceiling temperature measurement sensor for measuring the temperature of the ceiling 7 in addition to the window temperature measurement sensor 12, the outside temperature measurement sensor 13, and the ceiling temperature measurement sensor 14 described above. The heat load at the window is calculated by the following formula. Then, in the same manner as shown in FIG. 3 (d), the ventilation fan control window ratio and the ventilation fan control ceiling ratio are calculated by this heat load, thereby operating the window-side ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C. To do.

The calculation method for the heat load is performed by the following equation.
About "Ceiling heat load":
Ceiling conduction heat [kw] = heat transmissivity × ceiling area [m ² ] × (ceiling back temperature [° C.] − In-store temperature [° C.]) / 1000
Ceiling heat load [kw] = ceiling conduction heat [kw] + heat generation amount (lighting load) [kw]
About “Heat Load at the Window”:
Radiant heat [kw] = shielding coefficient × window area [m ² ] × window-side solar radiation [kw / m ² ]
Window conduction heat [kw] = Heat transmissivity × Window area [m ² ] × (Outside air temperature [° C.] − In-store temperature [° C.]) / 1000
Heat load at the window [kw] = radiant heat [kw] + window conduction heat [kw]
In addition, the calorific value (lighting load) [kw] of lighting uses a measured value of electric power, or is calculated by rated power of lighting fixtures × number of lighting fixtures.

  FIG. 8 shows one measurement data such as the temperature of each part, the amount of solar radiation, and the lighting load in the summer, middle, and winter seasons for the store interior and exterior environments. FIG. 9 shows the ventilation fan control window ratio and the ventilation fan control ceiling ratio calculated according to the heat load. FIG. 10 shows a relational expression between the window temperature and the amount of solar radiation in the summer when the store window faces northeast. x is the difference between the window temperature and the outside air temperature.

The value calculated by the equation shown in FIG. 10 is used as the value of the amount of solar radiation in FIG. In FIG. 8, for example, the amount of solar radiation in summer is one 0.0 [kw / m ² ], but the summer ventilation fan control shown in FIG. 9 is used by using the calculated value for each time as shown in FIG. If the window ratio and the ventilation fan control ceiling ratio are calculated for each time, thereby controlling the window ventilation fan 10 and the ceiling ventilation fans 11A, 11B, and 11C for each time every month and every day, Fine control is possible.

  The in-store ventilator according to the present invention is not limited to the configuration shown in the above embodiment, but can be applied to various forms, and includes various forms within the technical scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Convenience store 2 ... Front side 3 ... Back side 4 ... Inside the store 5 ... Air conditioning device 6 ... Showcase 7 ··· Ceiling 8 ··· Exhaust duct 9 ··· Ceiling 10 ··· Window ventilation fan 11A, 11B, 11C ··· Ceiling ventilation fan 12 ··· Window temperature measurement sensor 13 ··· Outside air temperature measurement sensor 14 ··· Ceiling temperature measurement sensor 15 ··· Control unit 16 ··· Damper device for window ventilation fan 17A, 17B, 17C · · · Damper device for ceiling ventilation fan 18 .... Lighting equipment

Claims (3)

  The back of the ceiling connected to the inside of the store is configured as an exhaust duct, and at least the ceiling in the store has a vent opening leading to the exhaust duct, and a ventilation fan attached to the upper part of the store window, and at least room temperature in the store A ventilating apparatus in a store, wherein a ratio between an exhaust amount through the exhaust duct and an exhaust amount through the ventilating fan is adjusted based on a determination using the air duct.   The back of the ceiling connected to the inside of the store is configured as an exhaust duct, and has at least a ventilating hole leading to the exhaust duct on the ceiling in the store, and a window-side ventilation fan attached to the upper wall of the store window, And a ceiling ventilation fan attached to each, wherein the ratio of the exhaust amount by the ceiling ventilation fan and the exhaust amount by the window ventilation fan is adjusted based on a determination using at least room temperature in the store. Ventilation equipment.   The in-store ventilator according to claim 1 or 2, wherein the determination includes at least an outside air temperature, a temperature near the window, and a temperature on a ceiling side.

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