JP2003161500A - Indoor air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor air conditioning system, with a reduced running cost and improved comfortableness in a room. <P>SOLUTION: The indoor air conditioning system comprises: a temperature sensor 10 detecting an ambient temperature; ambient air introducing means 8, 9 or the like introducing the ambient air into the room; and a control means 11 performing control to stop cooling operation and to make the ambient air introducing means 8, 9 or the like start the introduction of the ambient air. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an indoor air conditioning system.

[0002]

2. Description of the Related Art A heat pump type air conditioner is widely used for cooling and heating indoors. In addition, recently, there is also provided an air conditioner having a ventilation function to prevent indoor pollution by ventilation while cooling.

[0003]

However, the heat pump type air conditioner has a problem that the running cost is high irrespective of whether it is based on electric power or gas.

Under such circumstances, it is an object of the present invention to provide an indoor air conditioning system which can keep running costs low and yet improve indoor comfort.

[0005]

SUMMARY OF THE INVENTION The present invention is, firstly, that a cooling temperature is set to a high temperature in order to suppress running costs,
For example, it is often set to 28 ° C, etc.
In addition, as shown in FIG. 3, the outside air temperature from summer night to dawn is actually much lower than the air conditioner cooling setting temperature. Third, even if the outside air temperature is below the cooling setting temperature, The room temperature is made by paying attention to the fact that the cooling operation is likely to be continued because the room temperature exceeds the cooling setting temperature due to human body temperature or other factors.

That is, the above-mentioned problem is solved by the following: when a temperature sensor for detecting the outside air temperature, an outside air introducing means for introducing the outside air into the room, and an outside air temperature detected by the outside air temperature sensor are lower than the indoor cooling set temperature. A heat pump type indoor air conditioning system, which is provided with: a control unit that performs control for stopping the cooling operation and starting introduction of outside air by the outside air introduction unit.

In this indoor air conditioning system, when the outside air temperature falls below the indoor cooling set temperature during cooling, the cooling operation is stopped and the outside air introducing means introduces cool outside air having a temperature lower than the cooling set temperature into the room. Therefore, by stopping the cooling operation and introducing cool outside air, the running cost of cooling can be kept low, and at the same time, the comfort of the room can be improved.

When the outside air temperature detected by the temperature sensor exceeds the set temperature for cooling the room, the outside air introduction means may stop the introduction of the outside air and control means may be provided to start the cooling operation. . For example, when the outside air temperature rises and exceeds the cooling set temperature from dawn to morning, the outside air introduction is stopped and the cooling operation is performed, so that the room is kept cool.

When the outside air introducing means is composed of a blower fan provided in the indoor unit so that the outside air is blown out into the room, the blower fan in the indoor unit can also be used for introducing the outside air. Not only is it unnecessary to prepare a dedicated fan for introduction, but since the present invention introduces outside air by stopping the cooling operation, the blower fan of the indoor unit is intensively used for introducing outside air. As a result, the room can be quickly cooled by the outside air, and a refreshing cool breeze due to the outside air can be obtained inside the room.

Further, the above problem is that a temperature sensor for detecting the outside air temperature, an outside air introducing means for introducing the outside air into the room, and an outside air temperature detected by the outside air temperature sensor are higher than a room heating set temperature. The indoor air-conditioning system is also provided with: a control means for controlling the heating operation to be stopped and the outside air introduction means to start introducing the outside air. This system is for the winter season, but the heating set temperature during the day, for example, 19 ° C
When the temperature of the outside air becomes higher than the above value, the heating operation is stopped and the warm outside air is introduced, so that the running cost of heating can be kept low and the comfort in the room can be improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1 showing the air conditioning system of the embodiment, reference numeral 1 is a wall of a building, one side of which is an outdoor room 2 such as outdoors, and the other is an indoor room 3. An indoor unit 4 of an electrically operated heat pump type air conditioner for both heating and cooling is installed in a high place of the wall 1, an outdoor unit 5 is installed in the outdoor 2, and the indoor unit 4 and the outdoor unit 5 are They are connected by a refrigerant pipe 6 or the like. Then, while the heat pump is operating, by driving a fan (not shown) in the indoor unit 4, indoor air is sucked into the suction port 4a on the front side of the indoor unit 4,
The heat is exchanged with a heat exchanger (not shown) in the indoor unit 4, and the air is blown into the room from the air outlet 4b on the lower surface side of the indoor unit 4 to cool or heat the room 3.

In addition to the hole 7 for conducting the refrigerant pipe, an outside air intake hole 8 is opened in the wall 1, and the hole 8 and the indoor unit 4 are connected by a duct 9.

When the fan in the indoor unit 4 is driven, the indoor air is sucked in through the front inlet 4a of the indoor unit 4, passes through the internal heat exchanger, and is blown out from the outlet 4b at the bottom of the indoor unit 4 into the room. Cooling or heating operating state blown out to 3,
Similarly, there is provided a switching means for switching outside air to a state where the outside air is taken into the indoor unit 4 through the duct 9 in the driving state of the fan inside the indoor unit 4 and is blown out into the room from the outlet 4b at the lower part of the indoor unit 4. .

There is no particular limitation on the specific mode of the switching means. For example, the first opening / closing means for opening / closing the suction port 4a of the indoor unit 4, the outside air intake hole 8 or the outside air intake duct 9 are provided.
And a second opening / closing means for opening / closing the first opening / closing means and opening the first opening / closing means to close the second opening / closing means to enter a cooling or heating operation state, closing the first opening / closing means and opening the second opening / closing means. It may be in any form, such as the one in which the outside air is introduced by doing so.

As described above, in the present embodiment, the outside air introducing means is composed of the outside air intake duct 9, the switching means, and the blower fan provided in the indoor unit 4.

The outdoor unit 5 installed outside the room 2 is provided with a temperature sensor 10 for detecting the outside air temperature, and the signal of the outside air temperature detected by the temperature sensor 10 is used as the control means 11.
It is designed to be sent to.

When the system is operating in the cooling mode, the control means 11 receives a signal of the outside air temperature detected by the temperature sensor 10, compares the outside air temperature with the cooling set temperature, and the outside air temperature is cooled. When the temperature becomes lower than the set temperature, the operation of the heat pump is stopped, and the switching means is controlled to switch from the cooling operation state to the outside air introduction state. At that time, the blower fan in the indoor unit 4 continues to be driven. As a result, for example, when the outside air temperature becomes lower than the cooling set temperature during the cooling operation from summer night to dawn as shown in FIG. 2A, the operation of the heat pump is stopped, and FIG. The cool air outside 2 is introduced into the room 3 as shown in FIG. As a result, the power consumption of the system is suppressed, and the set temperature for cooling tends to be set to a temperature at which the temperature does not feel uncomfortable because it tries to keep power consumption low. By introducing a lower outside air, indoor comfort can be improved.

The operation of the system may be started from the cooling operation, and the outside air introduction operation may be performed depending on the condition of the outside air temperature after a certain period of time has passed. When the temperature is lower than the cooling set temperature, the system may be started in the outside air introduction state.

Further, in the present embodiment, the control means 11 starts the operation of the heat pump when the outside air temperature exceeds the cooling set temperature during the outside air introduction operation, and also causes the switching means to change from the outside air introduction state. The control for switching to the cooling operation state is also performed. At that time, the indoor unit 4
The blower fan inside continues to drive. This allows
For example, when the outside air temperature becomes higher than the cooling set temperature as it goes from the dawn of the outside air introduction operation to the morning, the outside air introduction operation is switched to the cooling operation, the cooling operation is started, and the indoor comfort is improved. To be kept.

In this embodiment, the control means 11 is provided in the indoor unit 4, and the signal line of the temperature sensor 10 is extended along the path of the refrigerant pipe 6 to control the inside of the indoor unit 4.
, But it can be installed anywhere. The control means 11 can be easily configured by using a microcomputer or the like.

In addition, it is necessary to discharge the air in the room in response to the introduction of the outside air. However, an exhaust port for that purpose may be provided in the room, or the air in the room may be discharged from a gap in a fitting or the like to another room. If it is designed to leak into, it is not necessary to provide a special exhaust port.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, in the cooling operation, the case where the outside air introduction operation is performed when the outside air temperature is lower than the cooling set temperature is shown, but in the heating operation, the outside air introduction is performed when the outside air temperature exceeds the heating set temperature. It may be configured to operate, or may be configured to be an air conditioning system having both of these functions. Even in the heating operation, for example, the room temperature is lower than the heating set temperature, but the outside air temperature is higher than the heating set temperature from daytime to afternoon in winter. By performing the introduction operation, the running cost of heating can be kept low, and yet the room can be warm and comfortable. In this case, when the outside air temperature falls below the heating set temperature in the outside air introduction state, the outside air introduction operation may be switched to the heating operation. The operation of the system is
The fact that the heating operation may be started or the outside air introduction operation may be started depending on the outside air temperature is the same as in the case of the cooling operation described above.

In the above embodiment, the case where the blower fan provided in the indoor unit is used as a constituent element of the outside air introducing means is shown. We installed an exclusive fan for introduction, and when the outside air temperature fell below the cooling set temperature, both the heat pump and the fan of the indoor unit were stopped, and the above-mentioned outside air introduction fan was driven so that switching was done. Good. The same is true for heating. Further, when the system of the present invention is applied to heating, the heating is not limited to the heat pump air conditioner as described above, but may be heating by a fan heater or stove of oil or gas, an electric stove, or the like. Needless to say.

[0025]

Since the indoor air conditioning system of the present invention is as described above, the running cost can be kept low and the indoor comfort can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of a building showing an indoor air conditioning system of an embodiment.

FIG. 2 is a view showing an operating state of the air conditioning system, wherein FIG. 2A is a sectional side view of a building during cooling operation, and FIG. 2B is a sectional side view during outside air introduction operation.

FIG. 3 is a graph showing a relationship between a change in outside air temperature from summer to June and a cooling set temperature. The unit of temperature is (° C).

[Explanation of symbols]

1 ... wall 2 ... outdoor 3 ... Indoor 4 ... Indoor unit 5 ... Outdoor unit 6 ... Refrigerant piping 9 ... Outside air intake duct (outside air introduction means) 10 ... Outside air temperature sensor 11 ... Control means

Claims (4)

[Claims] 1. A temperature sensor for detecting the outside air temperature, an outside air introducing means for introducing the outside air into the room, and an outside air temperature detected by the outside air temperature sensor when the outside air temperature is below an indoor cooling set temperature, the cooling operation is stopped. The heat pump type indoor air conditioning system is characterized by comprising: a control means for controlling the start of the outside air introduction by the outside air introduction means. 2. When the outside air temperature detected by the outside air temperature sensor exceeds the indoor cooling set temperature, the outside air introduction means stops the introduction of the outside air, and a control means for controlling the cooling operation is provided. The heat pump type indoor air conditioning system according to claim 1. 3. The heat pump type indoor air conditioning system according to claim 1, wherein the outside air introduction unit is configured to blow outside air into the room by a blower fan provided in the indoor unit. 4. A temperature sensor for detecting the outside air temperature, an outside air introducing means for introducing the outside air into the room, and a heating operation being stopped when the outside air temperature detected by the outside air temperature sensor exceeds a room heating set temperature. However, the indoor air conditioning system is provided with: a control means for controlling the start of the outside air introduction by the outside air introduction means.