JP2003050035A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating-cooling combination appliance of a forced convection type, in which consideration is given to distribution of room temperature by detecting room temperature and floor temperature. SOLUTION: A room-temperature detector 10 is provided in a farced convection indoor-unit 2, and a floor-temperature detector 11 is provided on a floor- heating panel 2. The indoor unit 2 and the floor-heating panel 3 are controlled in association with each other in accordance with detected results of respective temperature detectors. Thus, this appliance can conduct heating and cooling in meeting with room-temperature distribution, which varies every moment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling and heating device for cooling and heating by heat generated by a heat pump heat source machine.

[0002]

2. Description of the Related Art Conventionally, as a cooling and heating apparatus, a heat pump is used as a heat source, and the heat of a refrigerant is exchanged with the air to blow air into a room for cooling and heating. However, since the air-conditioning is performed by the forced convection method, the temperature of the room can be quickly brought to a predetermined temperature, but there is a drawback that a feeling of warm air causes a high degree of discomfort during heating. On the other hand, in recent years, in heating, floor heating has been reviewed for comfort. Since floor heating heats the room and human body by radiation, natural convection of indoor air and heat conduction,
There is no discomfort due to the wind, and since it is heated from the floor, the temperature distribution in the upper and lower parts of the room is uniform, and comfort is high. However, it has the disadvantage that it takes time to warm the entire room.

Therefore, as a cooling and heating device for compensating for the drawbacks of these two heating systems, a device described in Japanese Patent Application Laid-Open No. 11-173592 has been proposed. FIG. 7 shows the conventional cooling and heating device described in the above publication. As shown in FIG. 7, this cooling and heating device includes a heat pump heat source device 1, a forced convection indoor unit 2 and a floor heating panel 3, and a heat pump heat source device 1.
The indoor unit medium circuit 4 and the floor heating medium circuit 5 are connected to each other through which the medium for carrying the heat flows. An indoor unit heat exchanger 6 and a floor heating heat exchanger 7 are provided in the heat pump heat source unit 1, respectively, and heat of the heat pump heat source unit 1 is exchanged with a medium flowing through each medium circuit for indoor unit use. The indoor unit medium transporting means 8 and the floor heating medium transporting means 9 provided in the medium circuit 4 and the floor heating medium circuit 5, respectively, transport the medium to the forced convection indoor unit 2 and the floor heating panel 3 for heating and cooling. To do.

During heating, the heat pump heat source unit 1 heats the respective media in the indoor unit heat exchanger 6 and the floor heating heat exchanger 7, and conveys them to the forced convection indoor unit 2 and the floor heating panel 3. Then, heating is performed by warm air from the forced convection indoor unit 2, radiation from the floor heating panel 3, and natural convection of indoor air. At this time, the heating outputs of the forced convection indoor unit 2 and the floor heating panel 3 are changed according to the indoor temperature detected by the indoor temperature detecting means 10 provided in the forced convection indoor unit 2. For example, when the entire room is cold when the heating is started up, the forced convection type indoor unit 2 is mainly heated in order to perform heating with high quick-warming property, and when the room temperature rises, comfort is high. Gradually switch to floor heating panel 3 centered heating. Further, during cooling, the heat pump heat source unit 1 cools the medium flowing through the indoor unit medium circuit 4 by the indoor unit heat exchanger 6 and conveys the medium to the forced convection type indoor unit 2 for cooling by cold air.

[0005]

However, in the conventional structure, there is only one detecting means for detecting the temperature condition of the room, and the cooling / heating is performed in consideration of the temperature distribution in the room which is constantly changing by performing the cooling / heating. However, the temperature distribution in the room was uneven. Further, in particular, during cooling, since only the forced convection indoor unit is used for cooling, low-temperature air stagnates near the floor surface as in the case of conventional cooling, and cooling of the feet has been a problem.

[0006]

In order to solve the above-mentioned conventional problems, the cooling and heating apparatus of the present invention is provided with an indoor temperature detecting means in a forced convection type indoor unit and a floor surface temperature detecting means in a floor heating panel. By controlling the forced convection indoor unit and the floor heating panel in cooperation with each other according to the detection result of both temperature detection means, cooling and heating according to the temperature distribution in the room that changes moment by moment is performed and the temperature distribution in the room is made uniform. . Further, even during cooling, by effectively utilizing the floor heating panel and the floor surface temperature detecting means, the coldness of the feet can be eliminated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is provided with an indoor temperature detecting means for a forced convection indoor unit and a floor surface temperature detecting means for a floor heating panel, and the forced convection indoor room is provided according to the detection results. It has a configuration in which the machine and the floor heating panel are controlled in cooperation with each other, and cooling and heating can be performed according to the temperature distribution in the room.

According to the second aspect of the present invention, in particular, the wind speed and the wind direction of the forced convection indoor unit are controlled according to the floor surface temperature. Can be sent to any suitable place.

According to the third aspect of the present invention, the forced convection indoor unit is configured to increase the wind speed during heating when the floor surface temperature is low, and warm air with high temperature and low density can reach the floor surface. .

According to the fourth aspect of the present invention, when the floor surface temperature is low, the forced convection indoor unit is configured to raise the wind direction during cooling, and it is possible to prevent the cool air from reaching the floor surface.

According to the fifth aspect of the present invention, in particular, the forced convection indoor unit is configured to generate circulating air circulating in the room, and the air in the room is circulated in order to eliminate uneven temperature distribution in the room. You can

According to the sixth aspect of the present invention, in particular, during cooling, the forced convection indoor unit performs cooling operation while the floor heating panel performs heating operation, and the floor surface temperature is increased during cooling. You can

According to a seventh aspect of the present invention, in particular, the heat pump heat source device, the forced convection indoor unit, and the control means for controlling the floor heating panel are provided, and the control means of this cooling and heating device is one. You can

According to an eighth aspect of the invention, in particular, the operating refrigerant of the heat pump heat source device is CO ₂ or HC refrigerant,
Since the medium for transferring heat is water or antifreeze, it is possible to use a working refrigerant having a small warming effect in the heat pump heat source device without carrying the working refrigerant indoors.

According to a ninth aspect of the present invention, in particular, a heat storage tank is provided in the middle of a medium circuit that transfers heat from the heat pump heat source device to the forced convection indoor unit and the floor heating panel. Then, the heat can be used as an auxiliary or a temporary substitute for the heat pump heat source device to perform cooling and heating.

According to the tenth aspect of the present invention, in particular, the heat pump heat source device is operated in the midnight time to store heat in the heat storage tank, and the heat can be used for cooling and heating during the daytime. .

[0017]

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

(Embodiment 1) FIG. 1 schematically shows an air conditioner according to Embodiment 1 of the present invention. Since the air-conditioning apparatus of FIG. 1 has the same reference numerals as those of the conventional example of FIG. 7 and has the same functions, detailed description thereof will be omitted.
The different points will be mainly described.

The structure differs from that shown in FIG. 7 in that the floor heating panel 3 is provided with the floor surface temperature detecting means 11 and the heat pump heat source is detected according to the detection results of the indoor temperature detecting means 10 and the floor surface temperature detecting means 11. and in that the control means 12 is provided for controlling the operation of the machine 1 and the forced convection indoor unit 2 floor heating panel 3, the operation refrigerant of the heat pump heat source device 1 and CO _2, medium circuit 4 and the floor heating indoor unit The point is that the medium flowing through the medium circuit 5 is water.

The operation and action of this structure will be described below. Although the basic operation is the same as that of FIG. 7, the indoor temperature detected by the indoor temperature detecting means 10 provided in the forced convection indoor unit 2 and the floor surface temperature detecting means 11 provided in the floor heating panel 3 are detected. Forced convection type indoor unit 2
And the floor heating panel 3 are controlled in cooperation with each other to perform cooling and heating corresponding to the temperature condition of the room that changes from moment to moment.

In the case of heating, when the detected room temperature and floor surface temperature are low, the temperature of the entire room is quickly raised.
Heating is performed mainly on the forced convection indoor unit 2. At this time, when the floor surface temperature detected by the floor surface temperature detecting means 11 is low, as shown in FIG. 2, since the air having a high temperature has a small density and is light, it has a large density and is heavy, so that it is near the floor surface. It is hard to mix with low temperature air that is stagnant in the room, and it is difficult for warm air to reach the floor surface.Therefore, by increasing the velocity of warm air, warm air can reach the floor surface effectively and warm air can be heated. To do. As the temperature of the entire room rises, floor heating by the floor heating panel 3 is also performed at the same time, and the output is changed according to the room temperature and the floor surface temperature, and the room is effectively heated by warm air and the floor surface. Heating. In particular, when the indoor temperature is higher than the floor surface temperature, the heat is not transferred to the forced convection indoor unit 2 and the circulating air for circulating the indoor air is blown as shown in FIG. By driving
The temperature distribution in the room is made uniform by circulating the air throughout the room with a flow of air that does not feel wind. Then, when the temperature distribution in the room becomes sufficiently uniform, only the operation of the floor heating panel 3 is switched. Quick heating by warm air heating and comfort by floor heating are combined depending on the situation to perform heating according to the temperature distribution in the room.

In the case of cooling, the forced convection type indoor unit 2 is basically used.
Performs cooling operation only. When the room temperature and the floor surface temperature are sufficiently high, the output of the forced convection indoor unit 2 is maximized to cool the entire room. As the air in the room is cooled, the air having a low temperature has a high density and is heavy and accumulates near the floor surface, and the floor surface temperature decreases. When the floor surface temperature detecting means 11 detects a decrease in the floor surface temperature, the cold air does not directly reach the floor surface by raising the wind direction to prevent the floor surface temperature from decreasing as shown in FIG. At this time, it is also effective to increase the wind speed. When the floor surface temperature detected by the floor surface temperature detecting means 11 is remarkably lowered, the floor heating panel 3 is heated at the same time as the cooling operation of the forced convection indoor unit 2 to raise the floor surface temperature. In this way, even during cooling, by combining floor heating by the floor heating panel 3 in some cases, cooling according to the indoor temperature distribution is performed.

Further, by providing the control means 12 for controlling the heat pump heat source device 1, the forced convection type indoor unit 2 and the floor heating panel 3, it is possible to control the entire cooling and heating device by one control device. As an air conditioner
According to the indoor temperature distribution detected by the indoor temperature detecting means 10 and the floor surface temperature detecting means 11, the heat pump heat source device 1
It is possible to perform cooling and heating by effectively distributing the limited heat of hot air and floor heating.

Further, since the operating refrigerant is CO ₂ refrigerant, the warming effect due to the release of the refrigerant into the atmosphere is much smaller than that of HCFC refrigerant or HFC refrigerant. In addition, since water is heated by the indoor unit heat exchanger 6 and the floor heating heat exchanger 7 and conveyed to the forced convection type indoor unit 2 and the floor heating panel 3 for heating, it is compared to other refrigerants. The operation can be performed without transporting the high-pressure CO ₂ refrigerant into the room.

In this embodiment, the indoor unit medium circuit 4 is used.
Although the medium flowing through the floor heating medium circuit 5 is water, the same effect can be obtained by using an antifreeze liquid, and further, the freezing of the indoor unit medium circuit 4 and the floor heating medium circuit 5 can be prevented. Further, although the operating refrigerant of the heat pump heat source device 1 is the CO ₂ refrigerant, the warming effect of the operating refrigerant is much smaller than that of the HCFC refrigerant or the HFC refrigerant when the operating refrigerant is the HC refrigerant. In this case as well, since the working refrigerant is not carried into the room, there is no risk of combustion or explosion in the room due to the flammable HC refrigerant. Naturally, the working refrigerant is HCFC refrigerant or H
The cooling / heating device can be operated even when the FC refrigerant is used, and in this case, there is no problem even if the working refrigerant is conveyed indoors.

It should be noted that each of the configurations in this embodiment can be implemented independently.

(Embodiment 2) FIG. 5 schematically shows an air conditioner according to Embodiment 2 of the present invention. Since the air-conditioning apparatus of FIG. 5 has the same reference numerals as those of the first embodiment of FIG. 1 and has the same functions, detailed description thereof will be omitted.
The different points will be mainly described.

The structure is different from that shown in FIG. 1 in that heat exchange from the heat pump heat source unit 1 to water as a medium is performed by one heat storage heat exchanger 13, and the medium circuit 14 is a medium for an indoor unit. Branch into circuit 4 and floor heating medium circuit 5,
A point where a heat storage tank 15 is provided in the middle of the medium circuit 14 and one medium conveying means 16 for conveying water are provided in the medium circuit 14.
The indoor convection type indoor unit 2 and the floor heating are provided by respectively providing an indoor unit flow rate control valve 17 and a floor heating flow rate control valve 18 that regulate the flow rates of the water flowing in the indoor unit medium circuit 4 and the floor heating medium circuit 5. The points are connected to the panel 3, respectively.

The operation and action of this configuration will be described. The basic operation is the same as in FIG. 1, but heat exchange with water is performed by one heat storage heat exchanger 13, and the medium circuit 14 is branched into the indoor unit medium circuit 4 and the floor heating medium circuit 5. Since the water of the same temperature flows in both of them, the flow rates of the indoor unit flow rate adjusting valve 17 and the floor heating flow rate adjusting valve 18 provided in the indoor unit medium circuit 4 and the floor heating medium circuit 5, respectively, are used. Is changed to change the capacities of the forced convection indoor unit 2 and the floor heating panel 3.

Further, since the heat storage tank 15 is provided in the middle of the medium circuit 14, during the time period when the cooling / heating operation is not performed,
The water exchanged with the heat of the heat pump heat source device by the heat storage heat exchanger 13 can be stored in the heat storage tank 15,
When the output of the heat pump heat source device 1 is insufficient for the required cooling and heating load, such as at the start of operation, or when the cooling and heating capacity is required to exceed the maximum output of the heat pump heat source device 1. It can be used for assistance. Therefore, it is possible to shorten the startup time at the start of the cooling / heating operation, to perform the cooling / heating operation at the time of a power failure, and to temporarily cope with the increase in the cooling / heating load.

In the construction of this embodiment, the heat exchanger for exchanging the heat of the heat pump heat source device 1 with water and the heat storage tank are respectively provided as one heat storage tank, and the medium circuit 13 is branched to the forced convection indoor unit 2. Since they are connected to the floor heating panel 3 respectively, cooling and heating cannot be performed at the same time, but for the forced convection indoor unit 2 and the floor heating panel 3, a heat exchanger, a heat storage tank, a medium circuit, and a medium conveying means, respectively. By providing one each, it is possible to enable cooling and heating at the same time.

(Embodiment 3) FIG. 6 schematically shows an air conditioner according to Embodiment 3 of the present invention. Since the air-conditioning apparatus of FIG. 6 has the same reference numerals as those of the second embodiment of FIG. 5 and has the same functions, detailed description thereof will be omitted.
The different points will be mainly described.

The structure is different from that of FIG. 5 so that the heat storage heat exchanger 13 and the heat storage tank 15 can be circulated by the power of the heat storage medium transfer means 19 so that water can circulate through the heat storage heat exchanger 13 and the heat storage tank 15. It is connected with the heat storage medium circuit 20 and is configured to directly return the water after radiating heat through the forced convection indoor unit 2 and the floor heating panel 3 to the tank.

The operation and action of this structure will be described below. The heat pump heat source machine is operated by using the surplus electric power at midnight when the electricity price is low, and the water storage medium transfer means 19 is provided only between the heat storage heat exchanger 13 and the heat storage tank 15.
A heat storage operation is performed in which the water that has been heat-exchanged by the heat storage heat exchanger 13 is stored in the heat storage tank 15 by being circulated by the power of. Since the water circulation path is minimized, it is possible to perform efficient heat storage operation while suppressing heat dissipation due to circulation. At the time of heating, the water is heated to make it hot water of less than 100 degrees to store it as sensible heat. At the time of cooling, ice is made to store it by sensible heat up to 0 degrees and latent heat due to the phase change from water to ice. Stores heat with a high density. Then, the heat stored in the heat storage tank 15 in the daytime is supplied from the medium circuit 14 to the power of the medium conveying means 16 so that water serving as a medium is transferred between the indoor unit medium circuit 4 and the floor heating medium circuit 5 to the forced convection indoor unit 2. Air-conditioning is performed by transporting each to the floor heating panel 3. By reducing the output of the heat pump heat source device 1 and supplementing the shortage with the accumulated heat to perform cooling and heating, the peak demand of electric power is shifted, and the heat pump is operated by the cooling and heating operation using only the accumulated heat. It is possible to stop the operation of the heat source machine and cut the peak of power demand. In addition, since the surplus electricity at midnight, which has a low electricity rate, is used, running costs can be significantly reduced.

[0035]

As described above, according to the present invention, the forced convection indoor unit and the floor heating panel are controlled in cooperation with each other according to the detection results of the indoor temperature detecting means and the floor surface temperature detecting means.
It is possible to perform heating and cooling according to the temperature distribution in the room, which changes moment by moment.

[Brief description of drawings]

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

FIG. 2 is a diagram showing the effect of wind speed control during heating in the cooling and heating device.

FIG. 3 is a diagram showing an effect of circulating air during heating in the cooling and heating device.

FIG. 4 is a diagram showing an effect of wind direction control during cooling in the cooling and heating device.

FIG. 5 is a configuration diagram of an air conditioner according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram of an air conditioner according to a third embodiment of the present invention.

FIG. 7 is a block diagram of a conventional cooling and heating device.

[Explanation of symbols]

1 Heat pump heat source machine 2 Forced convection indoor unit 3 floor heating panel 4 Medium circuit for indoor unit 5 Floor heating medium circuit 10 Indoor temperature detection means 11 Floor temperature detection means 12 Control means 15 heat storage tank

Claims (10)

[Claims] 1. A heat pump heat source device, a forced convection indoor unit and a floor heating panel, which are connected to the heat pump heat source device via a medium circuit, respectively, and an indoor temperature detecting means provided in the forced convection indoor unit, A cooling and heating device which comprises a floor temperature detecting means provided on the same floor heating panel and controls the forced convection indoor unit and the floor heating panel in cooperation with each other according to the detection result of these temperature detecting means. 2. The cooling and heating apparatus according to claim 1, wherein the wind speed and the wind direction of the forced convection indoor unit are controlled according to the floor surface temperature detected by the floor surface temperature detecting means. 3. The air conditioner according to claim 2, wherein the wind speed of the forced convection indoor unit is increased during heating when the floor temperature is low. 4. The forced air convection indoor unit is increased in air direction during cooling when the floor surface temperature is low.
The air conditioner described in. 5. The cooling / heating apparatus according to claim 1, wherein the cooling / heating apparatus has an operation mode in which circulating air is blown from the forced convection indoor unit. 6. The cooling and heating according to any one of claims 1 to 5, wherein the cooling and heating has an operation mode in which the floor convection heating panel performs a heating operation while performing a cooling operation by a forced convection indoor unit during cooling. apparatus. 7. The cooling and heating apparatus according to claim 1, further comprising control means for controlling the heat pump heat source unit, the forced convection type indoor unit, and the floor heating panel. 8. The operating refrigerant of the heat pump heat source machine is CO ₂
8. The cooling / heating system according to claim 1, wherein an HC refrigerant is used, and a medium that transfers heat from the heat pump heat source device to the forced convection indoor unit and the floor heating panel is water or an antifreeze liquid, respectively. apparatus. 9. A heat storage tank is provided in the middle of a medium circuit for transferring heat from the heat pump heat source device to the forced convection indoor unit and the floor heating panel.
The air conditioning unit according to item. 10. The air conditioner according to claim 9, wherein the heat pump heat source device is operated during the midnight time to store heat in the heat storage tank.