JPH08152226A - Air-conditioner system - Google Patents

Abstract

PURPOSE: To utilize exhaust heat effectively and thereby to improve a heating efficiency by providing an air supply means for supplying air heated by a heat pump into a room to be air-conditioned, an exhaust means for discharging the air in the room outdoors and a duct for leading part of the air discharged by the exhaust means to an outdoor coil. CONSTITUTION: An air conditioner 1 comprises an indoor machine 18 installed indoors and an outdoor machine 20 installed outdoors. Air supply ports 62a to 62c and exhaust ports 64a to 64d are formed in a room 12 to be air- conditioned and the air supply ports 62a to 62c and an opening 24 (outlet 28 of the air conditioner) are made to communicate with each other through an air supply duct 66, while the exhaust ports 64a to 64d and an exhaust port 68 opened outdoors are made to communicate with each other through an exhaust duct 70. A temperature sensor 72 is provided in the vicinity of an inlet of the air supply duct 66 and dampers 76a to 76d of which the openings are controlled by damper control parts 74a to 74d are provided for the exhaust duct 70 in relation to the exhaust ports 64a to 64d, while an exhaust fan 80 of which the number of revolutions is controlled by an inverter 78 is provided in relation to the exhaust port 68.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner,
In particular, the present invention relates to an air conditioner that air-conditions a room such as a kitchen where the exhaust temperature is high.

[0002]

2. Description of the Related Art A conventional air conditioner 1 of this type shown in FIG. 3 includes an air conditioner 2. The air conditioner 2 is an indoor coil 3
And the indoor unit 2a having the air supply fan 4 and the like and the outdoor unit 2b having the outdoor coil 5 and the like, and the outlet of the air supply fan 4 communicates with the room (kitchen etc.) 6 to be air-conditioned through the air supply duct 7a. To be done. A gas appliance 8 such as a gas range is provided in the room 6, an exhaust port 9 is provided above each gas appliance 8, and each exhaust port 9 and the outside are communicated with each other through an exhaust duct 7b. .

During heating, the heat drawn up by the outdoor coil 5 is dissipated by the indoor coil 3, and the air (outside air) taken into the indoor unit 2a from the outside is heated through the indoor coil 3 and then supplied by the air supply fan 4. Is supplied into the room 6 through the air supply duct 7a. On the other hand, in room 6,
Almost the same amount of air as the supplied air is exhausted as it is from the exhaust port 9 through the exhaust duct 7b to the outside.

[0004]

In the prior art, there was a problem that the heating efficiency was poor because heat was pumped from the outside air having a low temperature by the outdoor coil 5 during heating. On the other hand, since the exhaust gas from the room 6 was exhausted to the outside as it was, the exhaust heat was wasted.

Therefore, a main object of the present invention is to provide an air conditioner which can improve heating efficiency by effectively utilizing exhaust heat.

[0006]

A first invention is a heat pump for heating the first air from the outside by dissipating the heat pumped by the outdoor coil by the indoor coil, and the inside of the room where the first air is to be conditioned. Is an air conditioner including: an air supply unit that supplies air to a room; an exhaust unit that exhausts the second air in the room to the outside; and a duct that guides a part of the second air exhausted by the exhaust unit to an outdoor coil. .

A second aspect of the invention is to provide a first heat exchanger for heating first air from the outside, an air supply means for supplying the first air into a room to be air-conditioned, and a second air in the room. Means for discharging air to the outside, and the second means provided in association with the exhaust means
Second heat exchanger that heats the first hot water using the heat of the air of the second heat source, a heating unit that heats the second hot water, and the first heat water is supplied to the first heat exchanger or the second heat exchanger. The air conditioner is provided with a switching means for switching whether to supply hot water.

[0008]

In the first aspect of the present invention, during heating, part of the exhaust gas discharged from the room to be air-conditioned is guided to the outdoor coil of the heat pump through the duct. Since the exhaust gas at the time of heating has a relatively high temperature, heat can be efficiently pumped up in the outdoor coil, and the heating efficiency can be improved.

According to the second aspect of the invention, when the temperature of the exhaust gas from the room to be air-conditioned during heating is below a predetermined value, the second hot water heated by the heating means is supplied to the first heat exchanger. Heat the outside air passing through the heat exchanger. On the other hand, when the temperature of the exhaust gas from the room to be air-conditioned exceeds a predetermined value, the switching means is switched to transfer the first hot water heated by the exhaust heat in the second heat exchanger to the first heat exchanger. Supply and heat the outside air. When the room to be air-conditioned is, for example, a kitchen, the temperature of the exhaust gas becomes a high temperature of about 60 ° C. by using the fire equipment, so that the first hot water can be sufficiently heated in the second heat exchanger.

[0010]

According to the first and second aspects of the present invention, the heat recovered from the exhaust gas is used to heat the outside air. The efficiency can be improved. The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0011]

EXAMPLE An air conditioner 10 of this example shown in FIG.
Is for air-conditioning the room 12 to be air-conditioned by the air conditioner 16 controlled by the controller 14. The air conditioner 16 includes an indoor unit 18 installed indoors and an outdoor unit 20 installed outdoors, and the indoor unit 18 includes a housing 22. Openings 24 and 26 are formed in the upper surface and the lower side surface of the housing 22, and an air supply fan 28 and an air filter 30 are provided inside the housing 22 in association with the openings 24 and 26, respectively. Also,
An indoor coil 32 is provided in the lower central portion of the housing 22, and a bypass fan 34 for returning the air passing through the indoor coil 32 to the inlet of the indoor coil 32 is provided above the indoor coil 32. And housing 22
An inverter 36 and the like for controlling the number of revolutions of the air supply fan 28 and adjusting the amount of blown air are provided outside the.

The outdoor unit 20 includes a housing 38. An opening 40 is formed in the upper surface of the housing 38, and openings 42 and 44 are formed in the side surface of the housing 38. The outdoor coil 46 and the compressor 4 are provided inside the housing 38.
8 and a four-way valve 50 are provided, and an exhaust fan 52 is provided in association with the opening 40. An inverter 54 and the like for controlling the capacity of the compressor 48 are provided outside the housing 38. The indoor coil 32, the outdoor coil 46, the compressor 48, and the four-way valve 50 are communicated with each other via a pipe 56 through which a refrigerant passes, thereby forming a refrigerant circuit.

The inverters 36 and 54 are connected to the AO (analog output) terminal 58 of the controller 14.
And the bypass fan 34, the four-way valve 50, and the exhaust fan 52 are connected to the DO (digital output) terminal 60.
Connected to. On the other hand, three air supply ports 62a, 62b and 62c and four air exhaust ports 64a, 64b, 64c and 64d are formed in the room 12 to be air-conditioned, and each of the air supply ports 62a to 62c and the opening of the indoor unit 18 are formed. 24
The (outlet of the air conditioner 28) communicates with each other through the air supply duct 66, and each of the exhaust ports 64a to 64d communicates with the exhaust port 68 opened to the outside through the exhaust duct 70. A temperature sensor 72 is provided near the inlet of the air supply duct 66, and a damper control unit 74 is provided in the exhaust duct 70 in association with each of the exhaust ports 64a to 64d.
Dampers 76a, 76b, 76c and 76d whose opening degrees are controlled by a, 74b, 74c and 74d are provided, and an exhaust fan 80 whose rotation speed is controlled by an inverter 78 is provided in association with the exhaust port 68. .
Further, a temperature sensor 82 is provided near the outlet of the exhaust duct 70.
Is provided. Then, the vicinity of the outlet of the exhaust duct 70 and the opening 42 of the outdoor unit 20 are communicated with each other via the duct 84,
The duct 84 is provided with a damper 88 whose opening is controlled by the damper control unit 86.

An exhaust port 64 is provided inside the room 12.
Gas appliances 92a, 92b and 92c such as exhaust hoods 90a, 90b and 90c, gas stoves and the like and switches 94a, 94b and 94c are provided in association with each of the gas appliances 92a-92c. Gas supply pipe 96 for supplying gas to
Is provided with a gas flow meter 98 for detecting the flow rate of gas. The switches 94a to 94c are the gas appliances 92a to
This is for switching the rotation speeds of the air supply fan 28 and the exhaust fan 80 and the opening degrees of the dampers 76a to 76c in a stepwise manner according to the usage status of the 92c. A room thermostat 102 including a switch 100 for turning on / off the air conditioner 16 and selecting an operation mode and a temperature detector and a temperature setter (not shown) are provided at predetermined locations in the room 12.

The temperature sensors 72 and 82, the gas flow meter 98 and the room thermostat 102 are connected to the controller 14.
Connected to the AI (analog input) terminal 104 of
Inverter 78 and damper control units 74a, 74b, 74c
And 86 are AO (analog output) terminals 58
And the switches 94a, 94b and 94c and the switch 100 are connected to the DI (digital input) terminal 1
06, and the damper control unit 74d is connected to the DO (digital output) terminal 60.

The numbers of the air supply port 62, the air exhaust port 64, the gas appliance 92, the switch 94, etc. may be increased or decreased as necessary, and the room thermostat 102 may supply air to set the air supply temperature. A device including a temperature setting device may be used. In operation, when the air conditioner 16 is turned on by the switch 100 and the heating operation mode is selected,
Air supply fan 28, bypass fan 34, exhaust fan 52
And the exhaust fan 80 is driven, and the damper control unit 74d
The damper 76d is opened by the air conditioner 1
The refrigerant circuit of No. 6 is operated in the heating cycle. That is, the refrigerant circuit operates as a heat pump. Then, in the indoor unit 18 of the air conditioner 16, air (outside air) from the outside is taken into the housing 22 through the opening 26, dust is removed through the air filter 30, and then heated through the indoor coil 32. And the indoor coil 32
The air that has passed through is sucked into the air supply fan 28 and is supplied into the room 12 through the air supply ducts 66 from the respective air supply ports 62a to 62c. At this time, part of the air that has passed through the indoor coil 32 is removed by the bypass fan 34.
And is further heated through the indoor coil 32.

On the other hand, in the outdoor unit 20, the air (outside air) from the outside is taken into the housing 38 through the opening 44, heat-exchanged (cooled) through the outdoor coil 46, and then the outside is opened from the opening 40 by the exhaust fan 52. Is discharged. The heat pumped from the outside air in the outdoor coil 46 is used to heat the outside air in the indoor coil 32. Then, the capacity of the compressor 48 is controlled by the inverter 54 so that the temperature of the room 12 detected by the room thermostat 102 becomes equal to the set temperature set by the room thermostat 102.

The opening degree of each damper 76a-76c is adjusted by each damper control section 74a-74c in conjunction with the operation of each switch 94a-94c which is switched depending on the usage state of the gas appliances 92a-92c. The air supply fan 28 and the exhaust fan 80 are set so that the air supply amount and the exhaust amount correspond to the entire operation of the switches 94a to 94c.
Commands are applied to the inverters 36 and 78 of. When not using any of the gas appliances 92a to 92c,
The dampers 76a to 76 are controlled by the switches 94a to 94c.
c is closed, and the air conditioner 16 is operated with the minimum air volume. When the output of the gas flow meter 98 becomes a predetermined value or more, the dampers 76a to 76 are provided so that the outside air amount according to the gas usage amount can be secured regardless of the states of the switches 94a to 94c.
As the opening degree of c is increased, the air volumes of the air supply fan 28 and the exhaust fan 80 are increased. In addition, a fire signal from a fire detection switch (not shown) is sent to the controller 14
Is input, the air conditioner 16 is stopped, the dampers 76a to 76d are closed, and smoke and flame are blocked.

During the heating operation, when the output of the temperature sensor 82 provided on the exhaust duct 70 exceeds a predetermined value, the damper control section 86 opens the damper 88 provided on the duct 84 to partially exhaust the exhaust gas. Is guided to the outdoor coil 46 of the air conditioner 16 (outdoor unit 20) through the duct 84. On the other hand, when the cooling operation is selected, the four-way valve 50 is switched to perform the reverse cycle (cooling cycle) operation of the refrigerant circuit, the air filter 30 removes dust, and the indoor coil 32 supplies the cooled air. It is supplied into the room 12 by the air fan 28.

According to this embodiment, a part of the exhaust gas discharged to the outside through the exhaust duct 70 during heating is duct 84.
The exhaust heat can be recovered in the outdoor coil 46 because it is guided to the outdoor coil 46 through.
Therefore, the heat exchange efficiency in the outdoor coil 46 can be improved, and the overall heating efficiency can be improved, as compared with the case where heat is recovered only from the outside air taken in through the opening 44.

In the above embodiment, part of the exhaust gas is guided to the outdoor coil 46 through the duct 84 when the output of the temperature sensor 82 exceeds a predetermined value during heating. If a part of the exhaust gas is guided to the outdoor coil 46 through the duct 84 when the output of 82 becomes equal to or less than a predetermined value, the heat exchange efficiency in the outdoor coil 46 can be improved even during cooling, and the overall cooling efficiency can be improved.

An air conditioner 11 of another embodiment shown in FIG.
In 0, the air conditioner 114 including the heat exchange coil (heat exchanger) 112 that heats or cools the outside air by using hot water or cold water is used, and the heat exchange coil (heat exchanger) 116 is provided in the exhaust duct 70. It is provided. The heat exchange coil 112, the heat exchange coil 116, the central heat source (heating / cooling device) 118, and the pump 120 form the water pipe 12.
The two-way valves 124 and the three-way valves 126 and 128 communicate with each other. Here, the two-way valve 124 is for controlling the amount of hot water supplied to the heat exchange coil 112, and the three-way valves 126 and 128 are the hot water from the central heat source 118 or the heat exchange coil 116 to the heat exchange coil 112. The hot water heated by the heat exchange coil 116 is supplied to the heat exchange coil 112 by the pump 120.

When the output of the temperature sensor 82 does not reach the predetermined value during the heating operation, the pump 120 is stopped and the hot water from the central heat source 118, which is a heating device, is transferred to the heat exchange coil 112 by the three-way valves 126 and 128. A hot water circuit is configured to supply the On the other hand, by using the gas appliances 92a to 92c, the temperature sensor 8
When the output of 2 exceeds a predetermined value, the three-way valves 126 and 1
By switching 28, the heat exchange coil 116
The hot water circuit is configured to supply the hot water from the pump to the heat exchange coil 112, and the pump 120 is driven.

On the other hand, when the cooling operation is selected, the three-way valves 126 and 128 are switched, and the cold water from the central heat source 118 which is a cooling device is supplied to the heat exchange coil 112. According to this embodiment, the heat exchange coil 1 provided in the exhaust duct 70 when the exhaust gas temperature during the heating operation is high.
Since the exhaust heat is recovered by 16 and the outside air is heated in the heat exchange coil 112 by utilizing this heat, the output of the central heat source 118 can be reduced and the overall heating efficiency can be improved. As in the embodiment, when the room 12 is a kitchen or the like that uses a fire facility, the temperature of the exhaust gas discharged to the outside through the exhaust duct 70 rises to about 60 ° C., so the heat exchange coil 116 collects it. It can be heated enough with just the heat.

[Brief description of drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is an illustrative view showing another embodiment of the present invention.

FIG. 3 is an illustrative view showing a conventional technique.

[Explanation of symbols]

 10, 110 ... Air conditioner 12 ... Room 16, 114 ... Air conditioner 32 ... Indoor coil 46 ... Outdoor coil 70 ... Exhaust duct 72, 82 ... Temperature sensor 84 ... Duct 112, 116 ... Heat exchange coil 118 ... Central heat source 120 … Pump 124… Two-way valve 126, 128… Three-way valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location F24F 13/24 (72) Inventor Norio Kuzuoka 6-5-30 Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Tadashi Uchiyama 6-5-30 Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Shuzo Akita 28 Hiraide Industrial Park, Utsunomiya City, Tochigi Prefecture Kubota Train Co., Ltd. Tochigi Plant (72) Inventor Tomoaki Horio 2-6-6 Moto-Asakusa, Taito-ku, Tokyo Within Tokyo Nissan Taito Building Kubota Train Co., Ltd. (72) Inventor Ken Nakano 28 Hiride Industrial Park, Utsunomiya City, Tochigi Prefecture Kubota Train Co., Ltd. Tochigi Plant

Claims (2)

[Claims] 1. A heat pump for heating the first air from the outside by dissipating the heat pumped by the outdoor coil by the indoor coil, an air supply means for supplying the first air into the room to be air-conditioned, the room An air conditioner comprising: an exhaust unit that exhausts the second air inside the unit to the outdoors; and a duct that guides a part of the second air exhausted by the exhaust unit to the outdoor coil. 2. A first heat exchanger for heating a first air from the outside, an air supply means for supplying the first air into a room to be air-conditioned, and a second air in the room to the outside. Exhaust means for discharging to, a second heat exchanger that is provided in association with the exhaust means and that heats the first hot water using the heat of the second air, and a heating means that heats the second hot water , And an air conditioner for switching between supplying the first hot water and the second hot water to the first heat exchanger.