JPH06272911A - Cooling or heating system - Google Patents

Abstract

PURPOSE:To prevent a dew formation at a ceiling surface by dehumidifying with a convection flow type cooling or heating device while performing a radiation cooling or heating at a ceiling surface, perform a convection flow type radiation capable of shortening a heating rising or cooling lowering time, apply one outdoor device as an operating device as well and to reduce an facility cost. CONSTITUTION:A ceiling radiation system in which a pipe 2 is buried in a ceiling panel 1 and cold or hot water is circulated in the pipe 2 and a convection flow system in which cold or hot water is circulated within a heat exchanger 4 and an indoor device is contacted with the cold or hot water are operated together and an outdoor device 5 is also applied for both a convection flow type heat exchanger 4 and the ceiling panel 1. Along with this arrangement, a circulation passage A passing through the ceiling panel 1 and the circulation pump 6 and a cold or hot water supplying passage B from the outdoor device 5 are merged at a merging part 7 and a degree of opening of the control valve 9 arranged in a cold or hot water supplying passage B is controlled in response an output from a water temperature sensor 8 arranged in the circulation passage A. Applying a mixing tank at the merged part enables a more efficient agitating effect to be attained.

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 system using both a ceiling radiation method and a convection method.

[0002]

2. Description of the Related Art In recent years, with the popularization of hot and cold water type heating and cooling, the advantages of the ceiling radiation type heating and cooling have been reconsidered. However, the ceiling radiation type has a high equipment cost and a long rise or fall time at room temperature, and Since it has a problem that dew condensation easily occurs on the ceiling surface during cooling, it has not become popular.

[0003]

In view of the above problems, the present invention prevents dew condensation on the ceiling surface by dehumidifying the interior of the room with a convection type air conditioner while performing radiant cooling and heating on the ceiling surface, and heating rising time. And convection radiation combined use method that can shorten the cooling down time, and to reduce equipment cost by sharing one outdoor unit for convection cooling and heating and ceiling radiation cooling and heating. To do.

[0004]

As shown in FIG. 1, a cooling and heating system according to the present invention is configured so that a pipe 2 embedded in a ceiling panel 1 is brought into contact with a metal plate 3 attached to a lower surface of the ceiling panel 1, The convection heat exchanger 4 and the ceiling panel are combined by using the ceiling radiation method in which the hot and cold water is circulated in the pipe 2 and the convection method in which the indoor air is passed through the heat exchanger 4 in which the hot and cold water circulates. 1 and the outdoor unit 5 are shared, and in the ceiling panel piping system, a circulation channel A passing through the ceiling panel 1 and the circulation pump 6 and a joint channel 7 where the cold / hot water supply channel B from the outdoor unit 5 merges. It is characterized in that it is provided with control means for controlling the opening degree of the control valve 9 provided in the cold / hot water supply passage B by the output of the water temperature sensor 8 provided in the circulation passage A.

[0005]

The temperature of the cold / hot water supplied to the convection heat exchanger is high at around 80 ° C during heating and low at around 7 ° C during cooling, so if it is supplied to the ceiling panel as it is,
Although the ceiling surface cannot be heated or cooled at a uniform temperature, according to the above configuration, the cold / hot water supplied from the outdoor unit side to the joint flow path 7 mixes with the water in the circulation path A having a large flow rate. And instantly converted to an intermediate temperature suitable for ceiling radiation,
Further, even when the room temperature reaches a steady value and the opening of the control valve 9 of the cold / hot water supply passage B is narrowed down by the output of the water temperature sensor 8 of the circulation passage A, the circulation pump 6 almost changes the flow rate of the circulation passage A. Therefore, the ceiling surface is always maintained at a uniform temperature.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, in which a ceiling panel 1 has a copper pipe 2 for circulating hot and cold water embedded therein, and the pipe 2 is attached to the lower surface of the ceiling panel 1 using aluminum. The convection type indoor unit 5 provided in the lower ceiling is configured to be in contact with the plate 3, and the indoor air is passed through the heat exchanger 4 in which cold and hot water circulates. It is shared by the convection heat exchanger 4 and the ceiling panel 1. The outdoor unit 5 may be a centralized type that is also used as a cooling / heating device in another room, a bathroom dryer, and the like. Although it is acceptable to supply hot water of 80 ° C to the convection indoor unit 5 and bathroom dryer, and cold water of around 7 ° C for cooling, in the case of ceiling radiant cooling / heating, the entire ceiling panel 1 is used. Since it is necessary to heat or cool the air conditioner at a uniform temperature, it is impossible to directly supply cold / hot water from the outdoor unit 5 shared by both types to the ceiling panel 1. Therefore, in the ceiling panel piping system, a circulation passage A passing through the ceiling panel 1 and the circulation pump 6 and a cold / hot water supply passage B from the outdoor unit 5 are formed, and a joint passage 7 where both passages A and B join together. And a control device (not shown) for controlling the opening of the control valve 9 provided in the cold / hot water supply passage B by the output of the water temperature sensor 8 provided in the circulation passage A.

The optimum temperature of the hot water supplied to the ceiling panel during heating is about 40 ° C., and the optimum temperature of the cold water supplied to the ceiling panel during cooling is 17 to 20 ° C., which is set by the operation unit of the control device. The ceiling panel 1 is constantly supplied with a constant flow rate of water by the circulation pump 6, and the circulation path A
In accordance with the output of the water temperature sensor 8, the appropriate amount of cooling water or hot water is mixed from the cold / hot water supply passage B side, and the water temperature of the circulation passage A is maintained at the set temperature. Since it is necessary to uniformly mix the water streams having different temperatures in the joint channel 7, it is desirable to lengthen the pipe used for the joint channel 7 to some extent. If the tank 10 for use is used, a higher stirring effect can be obtained. In the figure,
The tank body 10 has, for example, an inner size of 60 mmφ × 200 mm
This is made of copper in the shape of a hollow cylinder, and has a pair of inlets 11 and outlets 12 for connecting pipes at both ends, and mixes two kinds of water of high temperature and low temperature to bring them to the same temperature.

[0008]

As described above, according to the present invention, by using the convection type cooling and heating in combination with the ceiling radiation type cooling and heating, a comfortable cooling and heating by heat radiation is performed, and at the same time, dew condensation during cooling is prevented and a constant temperature is maintained. There is an advantage that the time to reach it can be shortened.In addition, in the ceiling panel piping system, a circulation channel that passes through the ceiling panel and the circulation pump and a cold / hot water supply channel from the outdoor unit are combined to provide a circulation path. Since the opening of the control valve installed in the cold / hot water supply path is controlled by the output of the water temperature sensor installed in the path, the temperature of the cold / hot water supplied to the convection cooling / heating machine is converted to an intermediate temperature. Thus, there is an advantage that the ceiling surface can be heated or cooled at a uniform temperature, whereby the outdoor unit can be shared and the facility cost can be reduced.

[Brief description of drawings]

FIG. 1 is a piping system diagram of an embodiment of the present invention.

FIG. 2 is a perspective view of a mixing tank used in the above.

[Explanation of symbols]

 1 Ceiling Panel 2 Pipe 3 Metal Plate 4 Heat Exchanger 5 Outdoor Unit 6 Circulation Pump 7 Combined Flow Path 8 Water Temperature Sensor 9 Control Valve 10 Mixing Tank 11 Inlet 12 Outlet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kaneda 4-1-2 Hiranocho Chuo-ku, Osaka City Osaka Gas Co., Ltd. (72) Inventor Kiyoshi Watanabe 2-10-5 Katamachi, Miyakojima-ku, Osaka Stocks Company Kumagai Gumi Osaka Branch (72) Inventor Hibiki Yamashiro 2-10-5 Katamachi, Miyakojima-ku, Osaka Stock Company Kumagai Gumi Osaka Branch (72) Inventor Nobuo Suzuki 3550 Kidayomachi, Tsuchiura, Ibaraki Hitachi Electric Cable Co., Ltd. Tsuchiura Plant (72) Inventor, Aritaka Tatsumi 3550, Kida Yomachi, Tsuchiura City, Ibaraki Prefecture Hitachi Cable Co., Ltd. Tsuchiura Plant

Claims (1)

[Claims] 1. A ceiling radiation method in which a pipe is embedded in a ceiling panel and cold and hot water is circulated in the pipe, and a convection method in which indoor air is passed through a heat exchanger through which cold and hot water circulates are used together. The convection heat exchanger and the ceiling panel share the outdoor unit, and in the ceiling panel piping system, the circulation channel that passes through the ceiling panel and the circulation pump and the cold / hot water supply channel from the outdoor unit merge. With the passage,
A cooling / heating system characterized in that an opening of a control valve provided in the cold / hot water supply passage is controlled by an output of a water temperature sensor provided in the circulation passage.