JPH09250777A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent outflow of indoor air and inflow of air from other rooms by providing a sensor which detects a pressure difference between the inside and the outside of a room and a control part which controls an exhaust means on the basis of a sensor output. SOLUTION: When a blower 10 for circulation of supply air and a blower 13 for exhaust are operated, indoor air is let in from an indoor inlet 2 as shown by an arrow A and part of it is exhausted from an outdoor discharge port 7 by the blower 13 for exhaust as shown by an arrow B, while the rest joins outdoor air in a prescribed quantity supplied from an indoor inlet 5 through a fixed-air-quantity damper 12 as shown by an arrow C and is passed through a coil 11 for heating/cooling by the blower 10 for circulation of supply air, heated or cooled by the coil and discharged into a room 9 as shown by an arrow D. Thus, ventilation and air conditioning are conducted at the same time. On the occasion, a pressure difference between the inside and the outside of the room 9 detected by a static pressure sensor 14 is sent as a signal to a control part 15 and the blowing capacity of the blower 13 for exhaust is regulated by the control part 15 so that the inside of the room 9 be kept at a prescribed pressure.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an air conditioner, and more particularly,
Regarding air conditioners used in hospitals, etc.

[0002]

2. Description of the Related Art In recent years, this kind of air conditioner has been used for maintaining a predetermined constant pressure environment in a room in order to prevent infection in a hospital.

Conventionally, in this type of air conditioner, FIG.
As shown in, an indoor suction port 101 for sucking the air in the chamber 107 into the air conditioner arranged in the chamber 107,
Indoor discharge port 102 for discharging air into the chamber 107
A circulation passage 103 connecting the indoor suction port 101 and the indoor discharge port 102, a blower 105 and a heating / cooling coil 106 arranged in the circulation passage 103 are provided.
A ventilation fan 108 is provided on the wall surface of 07.

In the above structure, the blower 10
When 5 is operated, the indoor air is drawn into the indoor suction port 1 as indicated by arrow U.
01 is sucked in, heated or cooled by the heating / cooling coil 106, and discharged from the indoor discharge port 102 as shown by an arrow V to air-condition the room. By operating the ventilation fan 108, the inside of the room 107 becomes dirty. The air is exhausted as shown by arrow W.

Further, as disclosed in Japanese Patent Laid-Open No. 1-252841, the pressure of the air supplied from the outside and the pressure of the exhaust from the room are detected, the circulating air volume is detected, and the valve opening of each air passage is adjusted. An air conditioner has been proposed that keeps the absolute pressure in the room constant.

[0006]

However, in such a conventional air conditioner, the ventilation fan 108 in the former case is used.
When the room is driven, the inside of the room becomes a negative pressure, air from the corridor or another room flows into the room as shown by an arrow X when the door is opened or closed, and the outside wind or the like is generated when the ventilation fan 108 is stopped. As a result, the indoor pressure becomes positive and the indoor air flows out to the corridor or other room as indicated by the arrow Y, or the inflow into the room or the outflow of indoor air is affected by the pressure in the corridor or other room. Due to the regular occurrence, there was a problem that pathogenic bacteria in the room and other rooms move in the corridors and between the rooms, which may cause hospital-acquired infection.

[0007] In the latter case, the pressure in the room can be kept constant without being affected by the outside wind or the pressure in other rooms, but the device is not integrated and is large-scale, and is not suitable for use in hospital rooms. The problem was that it would be quite expensive.

The present invention solves the above-mentioned problems, and is inexpensive and compact, which can prevent inadvertent outflow of room air and inflow from other rooms to maintain a predetermined constant pressure environment in the room and prevent hospital infection. The first object is to provide a simple air conditioner.

A second object is to buffer a rapid change in the room pressure due to outside wind, door opening / closing, etc., which cannot be instantaneously handled by an exhaust blower, and maintain the room at a predetermined pressure in a more stable state. .

A third object is to detect the room temperature by a temperature sensor and adjust the capacity of the heating / cooling coil to keep the room temperature, which changes with the change of the room pressure, constant and improve the comfort. .

A fourth object is to recover energy of exhaust gas by a heat exchanger and improve energy saving.

[0012]

An air conditioner according to the present invention comprises:
An air conditioner main body arranged indoors, an air supply means for sucking indoor air into the air conditioner main body, an outdoor intake port for supplying air into the room from the outside, and an air outside the room. An outdoor discharge port for discharging air, heating and cooling means for heating or cooling the air passing through the air conditioner body, exhaust means for exhausting air from the room to the room, and a pressure difference between the room and the room. It comprises a sensor and a control unit for controlling the exhaust means by the output of the sensor.

Further, the air conditioner of the present invention has an air conditioner main body arranged in a room, an indoor suction port for sucking the indoor air provided in the main body into the main body, and an air discharge to the room. Indoor discharge port, an air supply passage from the outdoor to the indoor discharge port having a constant air volume damper, and an outdoor discharge port for discharging air from the indoor suction port to the outside,
A heating / cooling means for heating or cooling the air passing through the air conditioner main body, and an exhaust air blower of variable air volume, which communicates with the outdoor discharge port and whose air blowing capacity can be freely increased and decreased, and a pressure difference between the indoor and outdoor It comprises a sensor for detecting and a control unit for controlling the exhaust blower by the output of the sensor.

In the present invention, the wall of the chamber is
An exhaust pressure control damper that opens from the room to the outside and an air supply pressure control damper that opens from the room to the room are provided.

Further, in the present invention, a temperature sensor for detecting the room temperature and a controller for adjusting the capacity of the heating / cooling means corresponding to the temperature sensor are provided in the main body.

Further, in the present invention, a heat exchanger for exchanging heat between the air sucked into the room and the air exhausted to the outside is provided.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

[0018]

【Example】

 (Example 1)

In the first embodiment of the present invention, as shown in FIG. 1, an indoor suction port 2, an indoor discharge port 3 and the indoor suction port 2 are provided in an air conditioner body arranged in a chamber 9. To the indoor discharge port 3, and a supply passage 6 from the outdoor suction port 5 for sucking air into the air conditioner body 1 from the outside of the chamber 9 formed in the wall 18 of the chamber 9 to the indoor discharge 3. An exhaust passage 8 extending from the indoor suction port 2 to the outdoor discharge port 7 formed on the wall 18 of the chamber 9, and a supply air circulation blower 10 and a heating / cooling coil 11 common to the circulation passage 4 and the supply passage 6. In addition, in the exhaust passage 8, the air blower 1 adjacent to the outdoor discharge port 7 and having a variable air flow rate capable of freely increasing and decreasing the air blowing capacity is provided.
And 3 are provided.

Further, a constant air volume damper 12 is provided between the outdoor suction port 5 of the air supply passage 6 and the air supply circulation blower 10, and the chamber 9
A static pressure sensor 14 for detecting the pressure difference between the inside and the outside of the chamber 9 is provided, and this output signal is applied to the control unit 15 which controls the blowing capacity of the exhaust blower 13.

Since the air conditioner of the present invention has the above-described structure, when the air supply circulation blower 10 and the exhaust blower 13 are operated, the indoor air is sucked from the indoor suction port 2 as shown by an arrow A. Part of the air is exhausted from the outdoor discharge port 7 by the exhaust blower 13 as shown by the arrow B, and the rest is joined with the fixed amount of outside air supplied from the outdoor suction port 5 through the constant air volume damper 12 as shown by the arrow C. Then, it is heated or cooled by the air supply circulation blower 10 through the heating / cooling coil 11 and is discharged from the indoor discharge port 3 into the chamber 9 as shown by an arrow D,
Ventilation and air conditioning are performed at the same time. At this time, the pressure difference between the inside of the chamber 9 and the outside of the chamber 9 detected by the static pressure sensor 14 is sent to the control unit 15 as a signal, and the control unit 15 adjusts the blowing capacity of the exhaust blower 13 to adjust the inside of the chamber 9. Will be maintained at a predetermined constant pressure.

As described above, according to the air conditioner of the first embodiment of the present invention, the static pressure sensor 14 for detecting the pressure difference between the inside and the outside of the room 9 and the control unit 15 for exhausting the exhaust air are used. By increasing or decreasing the capacity of the blower 13 to make the pressure in the chamber 9 negative or positive with respect to the outside, it is possible to prevent the outflow of indoor air or the inflow from other chambers and keep the inside of the chamber 9 at a predetermined constant level. It can be maintained in a pressure environment.

(Embodiment 2)

Next, a second embodiment of the present invention will be described with reference to FIG. The same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

In the second embodiment of the present invention, as shown in FIG. 2, an exhaust pressure adjusting damper 16 that opens from the inside of the chamber 9 to the outside of the chamber 9 and a supply pressure that opens from the outside of the chamber 9 to the inside of the chamber 9. An air pressure adjusting damper 17 and a wall 17 of the chamber 9 are provided.

Since the second embodiment of the present invention has the above-described structure, when the inside of the chamber 9 is set to a predetermined positive pressure for operation, the arrow E is passed through the exhaust pressure adjusting damper 16. By exhausting the indoor air little by little like the above, it is possible to absorb the pressure fluctuations of the air supply circulation blower 10 and the exhaust blower 13 and to stably maintain the set pressure in the chamber 9, and thus the outside air, etc. Due to this, even when there is a risk that the exhaust amount will decrease and exceed the set pressure in the chamber 9, the exhaust pressure adjusting damper 16 will open greatly and the inside of the chamber 9 will be maintained at the set pressure. Further, when there is a risk that the pressure in the chamber 9 will suddenly decrease due to opening and closing of the door, etc., the supply pressure adjusting damper 17 will open promptly and the outside air will be supplied as indicated by the arrow F, and the pressure in the chamber 9 will drop. Is blocked. Further, when the inside of the chamber 9 is set to a predetermined negative pressure for operation, the supply air pressure adjusting damper 17 supplies the outdoor air little by little as shown by the arrow F, so that the air supply circulation blower 10 And the set pressure in the chamber 9 can be stably maintained by absorbing the pressure fluctuation of the exhaust blower 13 and the exhaust pressure adjusting damper 16 opens even if the exhaust amount decreases due to outside wind or the like, so that the inside of the chamber 9 The pressure does not become positive, and when the pressure in the chamber 9 may suddenly increase due to opening and closing of a door or the like, the exhaust pressure adjusting damper 16 also opens so that the pressure in the chamber 9 does not become positive. Absent.

As described above, according to the air conditioner of the second embodiment of the present invention, the outside air and the door which cannot be instantaneously dealt with by adjusting the blowing capacity of the exhaust blower 13 by the static pressure sensor 14 and the controller 15. It is possible to buffer a rapid change in the room pressure due to opening and closing of the chamber, and to maintain the inside of the chamber 9 at a predetermined pressure in a more stable state.

(Example 3)

Next, a third embodiment of the present invention will be described with reference to FIG. The same parts as those in the first and second embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

In the third embodiment of the present invention, as shown in FIG. 3, a temperature sensor 19 is provided in the circulation passage 4 upstream of the blower 10 for supply air circulation, and the capacity of the heating / cooling coil 11 is adjusted. The temperature sensor 19 detects the temperature of the indoor air sucked from the indoor suction port 2, sends the detection signal to the controller 15, and adjusts the controller 20 to adjust the heating / cooling coil 11.
Adjust the ability of.

As described above, according to the air conditioner of the third embodiment of the present invention, the room temperature is detected by the temperature sensor 19 and the capacity of the heating / cooling coil 11 is adjusted to change with the change of the room pressure. Room temperature can be kept constant and comfort can be improved.

(Example 4)

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first to third embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

In the third embodiment of the present invention, as shown in FIG. 4, the heat exchanger 21 is provided between the air supply passage 6 and the exhaust passage 8.

Since the fourth embodiment of the present invention has the above-mentioned structure, it is a blower 10 for supply air circulation and a blower 13 for exhaust air.
When the engine is operated, the indoor air is sucked from the indoor suction port 2 as shown by the arrow A, part of the air is exhausted by the exhaust blower 13 through the heat exchanger 21 from the outdoor discharge port 7 as shown by the arrow B, and the rest is , From the outdoor suction port 5 through the heat exchanger 21 as shown by the arrow C, and merges with a constant amount of outside air supplied through the constant air volume damper 12, and is heated by the air supply circulation blower 10 through the heating / cooling coil 11. Alternatively, it is cooled and discharged from the indoor discharge port 3 into the chamber 9 as indicated by an arrow D, and heat exchange ventilation and air conditioning are performed simultaneously.

As described above, according to the air conditioner of the fourth embodiment of the present invention, a part of the indoor air is exhausted by the exhaust blower 13 through the heat exchanger 21, and the heat exchanger 21 and the constant air flow rate. A certain amount of outside air supplied through the damper 12 and room air are mixed and blown by the air supply circulation blower 10, and heated or cooled by the heating / cooling coil 11 to perform heat exchange ventilation in the room 9. Air conditioning can be performed at the same time, and energy loss due to ventilation can be reduced.

[0037]

As is apparent from the above embodiments, according to the present invention, a variable air volume exhaust fan for exhausting a part of the indoor air, and a fixed amount of the supplied outside air and the indoor air are mixed. A ventilation air blower and a heating / cooling coil are installed inside the main body to ventilate and air-condition the room at the same time, and a static pressure sensor that detects the pressure difference between the room and the room, depending on the indoor conditions. Since the control unit can freely adjust the capacity of the exhaust blower, it can prevent inadvertent outflow of room air and inflow from other rooms and maintain a predetermined constant pressure environment in the room to prevent hospital infections etc. An inexpensive and compact air conditioner can be provided.

Further, since the exhaust pressure adjusting damper which opens from the room to the outside and the air supply pressure adjusting damper which opens from the room to the room are provided on the wall of the room, it is not possible to instantaneously cope with the adjustment of the blowing capacity of the exhaust blower. It is possible to provide an air conditioner capable of buffering a sudden change in the indoor pressure due to such external winds and opening / closing of a door, and maintaining the indoor at a predetermined pressure in a more stable state.

Further, since the temperature sensor provided inside the main body detects the room temperature and the controller can adjust the capacity of the heating / cooling coil, the room temperature which changes with the change of the room pressure is kept constant, and the comfort is improved. It is possible to provide an air conditioner that can improve

Further, since the heat exchanger is provided between the air supply passage and the exhaust passage, it is possible to provide the air conditioner capable of recovering the energy of the exhaust gas and improving the energy saving property.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an air conditioner according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing an air conditioner of a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an air conditioner of a third embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an air conditioner of a fourth embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a conventional air conditioner.

[Explanation of symbols]

 1 Air Conditioner Main Body 2 Indoor Suction Port 3 Indoor Discharge Port 4 Circulation Passage 5 Outdoor Suction Port 6 Air Supply Passage 7 Outdoor Discharge Port 8 Exhaust Passage 9 Indoor 10 Air Supply Circulation Blower 11 Heating / Cooling Coil 12 Constant Air Volume Damper 13 For Exhaust Blower 14 Static pressure sensor 15 Control unit 16 Exhaust pressure adjustment damper 17 Supply pressure adjustment damper 18 Wall 19 Temperature sensor 20 Regulator 21 Heat exchanger 101 Indoor suction port 102 Indoor discharge port 103 Circulation passage 104 Air conditioner body 105 Blower 106 Heating / cooling coil 107 room 108 ventilation fan

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Yazawa 1097-26 Kotamachi, Sakae-ku, Yokohama-shi, Kanagawa (72) Inventor Kiyotaka Hagiwara 1-2-25-103 Okura, Setagaya-ku, Tokyo Hajime Takayama (72) 5-12-9 Minami Yana, Hadano City, Kanagawa Prefecture

Claims (5)

[Claims] 1. An air conditioner main body arranged indoors, an air supply unit for sucking indoor air into the air conditioner main body, an outdoor air intake port for supplying air into the room from the outside, An outdoor outlet for discharging air from the room to the outside, a heating / cooling means for heating or cooling the air passing through the air conditioner body, an exhaust means for exhausting the air from the room to the outside, and an indoor / outdoor An air conditioner comprising a sensor for detecting a pressure difference and a control unit for controlling the exhaust means by the output of the sensor. 2. An air conditioner main body arranged indoors, an indoor suction port for sucking indoor air provided in the main body into the main body, an indoor discharge port for discharging air into the room, and an outdoor space. To the indoor discharge port, which has a constant air volume damper, an outdoor discharge port for discharging air from the indoor suction port to the outside, and heating or cooling air passing through the air conditioner main body. A heating / cooling means, an exhaust air blower that communicates with the outdoor discharge port and has a variable air volume that can freely increase and decrease the air blowing capacity, a sensor that detects a pressure difference between indoor and outdoor air, and an exhaust air blower that outputs the sensor. An air conditioner comprising a control unit for controlling. 3. The exhaust pressure adjusting damper that opens from the room to the outside and the supply pressure adjusting damper that opens to the room from the outside are provided on the wall of the room. Air conditioner. 4. A temperature sensor for detecting an indoor temperature and a controller for adjusting the capacity of the heating / cooling means corresponding to the temperature sensor are provided in the main body. Or the air conditioner described in 3. 5. The air conditioner according to claim 1, further comprising a heat exchanger for exchanging heat between the air sucked into the room and the air exhausted to the outside.