JPH08303840A - Cooling/heating system having dehumidifier with room temperature adjusting function - Google Patents

Abstract

PURPOSE: To perform accurate control of temperature and humidity by a method wherein when room temperature and humidity at which dew condensation occurs on a radiation cooling/heating panel surface are detected, only a dehumidifier is operated and a room temperature and humidity at which dew condensation does not occur are detected, a medium at a heat accumulation source is caused to flow to a radiation cooling heating panel and a heat-exchanger. CONSTITUTION: A radiation cooling/heating panel 8 is installed in a room R in which a medium from a heat accumulation source W is circulated to the outside of a dehumidifier 3. When a room temperature and humidity at which dew condensation occurs on a radiation cooling heating panel 8 surface are detected, only the dehumidifier 3 is operated. Further, when a room temperature and humidity at which dew condensation does not occur on the radiation cooling heating panel 8 surface are detected, a medium from a heat storage source W is caused to flow to the radiation cooling heating panel 8 by a switching indication adjuster 4 and the medium is switched by switching valves V1 and V2 in such a manner that the medium is caused to flow to the heat-exchanger of the dehumidifier 3. This constitution performs accurate control of temperature and humidity, improves cooling efficiency, and effects heating which utilizes only the radiation cooling/heating panel 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system having a dehumidifier with a room temperature control function installed in offices, hospitals, multipurpose halls, clean rooms, station buildings (for example, concourses and waiting rooms) and the like.

[0002]

2. Description of the Related Art The air conditioning system that is generally used at present is a system that blows cold and warm air by an air handling unit and a fan coil unit, and both of them circulate air. With this air-conditioning system, the temperature distribution in the room has a temperature difference of 5 degrees or more between the upper and lower sides during heating, and the feet are cold and the head is hot even during cooling, which is the opposite of "head cold foot heat". turn into. In addition, it was directly hit by cold air of a considerably low temperature, which caused air-conditioning disease and the like.

A ceiling cooling and heating system which provides a comfortable indoor environment without the above-mentioned inconvenience is known (Japanese Patent Laid-Open No. 5-2807).
68, JP-A-7-19533). The combination of temperature, humidity, air flow, and radiant heat is a factor for people to feel comfortable indoors. However, if the ceiling cooling and heating system of this prior application is introduced, not only the temperature control but also the lower temperature Since the heat radiation transmitted to the user is used, the room temperature (for example, 21 degrees) lower than the set temperature (for example, 26 degrees) of the conventional air conditioning during heating, and the set temperature (for example, for the conventional air conditioning) during cooling. You can feel comfortable even at room temperature (eg, 27 degrees) higher than 25 degrees. Electric power can be saved by using this ceiling cooling and heating system in combination with conventional air conditioning.

However, in the conventional air conditioning in the prior application, the fan coil unit is used for dehumidification, but there is no particular control mechanism for dehumidification, and dehumidification is performed depending on the circumstances. Therefore, the dehumidifying ability is not necessarily good, and the minimum temperature of the radiant cooling / heating panel surface where dew condensation does not occur on the radiant cooling / heating panel surface is limited to around 19 degrees.

[0005]

DISCLOSURE OF THE INVENTION The present invention utilizes only the radiation cooling / heating panel and the cooling having better cooling efficiency by lowering the minimum temperature at which the radiation cooling / heating panel surface does not condense as compared with the conventional ceiling cooling / heating system. An object of the present invention is to provide a cooling and heating system having a dehumidifier with a room temperature control function for heating.

[0006]

The above-mentioned problem is solved by the dehumidifier 3 having a compressor P, a condenser S, an expansion valve E and an evaporator V.
In adjusting the temperature and humidity in the room R by the heat exchanger H provided between the compressor P and the condenser S for cooling by the medium from the heat storage source W, and by the temperature instruction controller 7 in the room R In the dehumidifier with a room temperature control function installed in the room R that adjusts the amount of the medium of H and adjusts the operating state of the compressor P by the humidity indicating controller 9, the dehumidifier 3 is provided with a heat storage source W The radiant cooling / heating panel 8 installed in the room R in which the medium circulates is provided, and when the room temperature and the humidity at which dew condensation occurs on the radiant cooling / heating panel 8 surface are detected, only the dehumidifier 3 is operated, and the radiant cooling / heating panel 8 surface. When the room temperature and the humidity at which no dew condensation occurs are detected, the switching instruction controller 4 causes the medium from the heat storage source W to flow to the radiant cooling / heating panel 8 and a switching valve to switch the medium to the heat exchanger H. Dehumidification with room temperature control function 3 can be achieved by heating and cooling system having a.

Further advantageous configurations according to the invention are described in the dependent claims.

[0008]

EXAMPLE FIG. 1 shows a system diagram of a dehumidifier system with a room temperature control function used in this system.

The dehumidifier 3 is provided with a heat exchanger H in a part of a conduit to the condenser S in the dehumidifier 3, and a medium circulating in the system (inflow from the introduction conduit 14 and outflow from the exhaust conduit 15). ) To remove the heat of the refrigerant on the dehumidifier 3 side,
The temperature of the condenser S, which has risen due to the heat generated from the compressor P, can be lowered, reheat in the dehumidifier 3 can be suppressed, and the temperature of the air blown out into the room R (arrow in the figure) can be lowered. The temperature control of the air blown out is performed by adjusting the electric three-way valve V3 by the temperature instruction controller 7 to increase or decrease the flow rate of the medium flowing into the introduction conduit 14. Further, for controlling the humidity of the air to be blown out, the humidity indicator controller 9 controls the compressor P in the dehumidifier 3.
Is intermittently operated to increase or decrease the amount of refrigerant gas ejected from the expansion valve E. As described above, the dehumidifier 3 with a room temperature control function used in the present system includes the water-cooled heat exchanger H and the control device for setting the temperature and the humidity of the air blown from the dehumidifier 3, respectively.
It has better dehumidification performance than a fan coil unit that does not have a controller that sets the temperature and humidity of the air blown from the dehumidifier used in the conventional system. Therefore, since the temperature of the radiant cooling / heating panel surface can be set to about 17 degrees, the cooling efficiency is improved.

An embodiment of an air conditioning system having the dehumidifier with room temperature control function according to the present invention will be described with reference to FIG. When the dehumidifier with a room temperature control function 3 equipped with the circulation pump P1 and the water-cooled heat exchanger H is operated, the switching instruction controller 4 causes the radiation cooling / heating panel 8 to be dewed at the time of starting the system from the temperature and humidity of the room R. The dew point temperature is calculated (for example, room temperature is 27 degrees and humidity is 55 percent). When the actual room temperature is 27 degrees or higher and the indoor humidity is 55% or higher, the electric valve V1 is closed and the electric valve V2 is opened.
In this case, the medium of the heat storage source W is not supplied to the radiant cooling / heating panel 8 and other radiant cooling / heating panels (if present) after passing through the circulation pump P1 and the introduction conduit 10, and the dehumidifier 3 with a room temperature control function is provided. Directly into. At this time, since no dew condensation occurs on the radiant cooling / heating panel 8 surface and the other radiant cooling / heating panel surfaces, the problem of drops dripping on the floor surface does not occur. The medium that has flowed into the dehumidifier 3 with a room temperature control function from the inflow conduit 14 is the exhaust conduit 15, the electric three-way valve V3, and the exhaust conduit 1.
It returns to the heat storage source W again via 7. However, if the temperature seems to drop too much, it will short circuit a portion from the exhaust conduit 16.
The operation of only the dehumidifier 3 with a room temperature control function continues until the indoor condition where the radiant cooling / heating panel 8 surface does not condense.

When the room temperature is lower than 27 degrees and the room humidity is lower than 55% by the operation of the dehumidifier 3 having a room temperature control function, the switching instruction controller 4 opens the electric valve V1 and closes the electric valve V2. Switch the valve. In this case, since dew condensation does not occur on the radiant cooling / heating panel 8 surface and other radiant cooling / heating panel surfaces (if present), the medium is supplied to the radiant cooling / heating panel 8 and other radiant cooling / heating panels, and the dehumidifier 3 with room temperature control function is provided. The medium after passing through the radiant cooling / heating panel 8 and the other radiant cooling / heating panel 8 flows into the. Then, the medium that has flowed into the dehumidifier 3 with a room temperature control function returns to the heat storage source W again via the discharge conduit 15, the electric three-way valve V3, and the discharge conduit 17. In this way, the dehumidifier 3 with the room temperature control function and the radiant cooling / heating panel 8 are simultaneously cooled, so that the energy saving effect is enhanced.

The radiant cooling / heating panel 8 may be made of aluminum by extrusion molding. A groove is provided on the back side of the panel, and a polyethylene pipe is embedded in the groove so that it adheres closely to it, and a special cap is used to hold it down. At the same time, by applying a ceramic coating on the panel surface, the surface area can be increased by about 1.5 times as compared with the case of using a general organic coating, so that the heat dissipation effect is improved and further energy saving effect can be expected.

If ground water is used as a medium in this heating / cooling system, energy can be further saved. On the other hand, during heating, since dew condensation does not occur on the radiant cooling / heating panel 8 surface, the dehumidifier 3 with a room temperature control function is stopped. Then, the medium is circulated through each component of the present system is heated by the air cooling chiller 1 and the conduit is switched so that the radiation cooling / heating panel 8 alone is used for heating.

[0014]

As described above, in the cooling and heating system having the dehumidifier with room temperature control function according to the present invention, the dehumidifier with room temperature control function has a water-cooling type heat exchanger and the temperature and humidity of the air blown from the dehumidifier. Since it has a control device that sets each, cooling and cooling with better cooling efficiency than the conventional cooling and heating system because the control of temperature and dehumidification is accurate,
It is possible to perform heating using only radiant cooling and heating panels.

[Brief description of drawings]

FIG. 1 is a system diagram of a dehumidifier system with a room temperature control function.

FIG. 2 is a system diagram of an air conditioning system having a dehumidifier with a room temperature control function according to the present invention.

[Explanation of symbols]

 1 Air-cooled chiller 2 Cold / hot water tank 3 Dehumidifier with room temperature control function 4 Switching indicator controller 5 Temperature sensor 6 Humidity sensor 7 Temperature indicator controller 8 Radiant cooling / heating panel 9 Humidity indicator controller 10, 11, 12, 13, 14, 14, 18 , 19 Introduction conduit 15, 16, 17 Discharge conduit V1, V2 Electric valve V3 Electric three-way valve P1 Circulation pump M1, M2, M3 Motor R Indoor P Compressor S Condenser E Expansion valve V Evaporator W Heat storage source H Heat exchange Vessel A accumulator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Kusuma 4-1, Egasaki-cho, Tsurumi-ku, Yokohama City TEPCO Ltd. Electric Power Technology Research Institute (72) Masanori Otake 4-1-1, Egasaki-cho, Tsurumi-ku, Yokohama Tokyo Electric Power Co., Inc.

Claims (5)

[Claims] 1. A compressor (P), a condenser (S), an expansion valve (E) and a dehumidifier (3) having an evaporator (V) are used to control the temperature and humidity of a room (R) by a dehumidifier (3). A heat exchanger (H) for cooling with a medium from a heat storage source (W) is provided between the machine (P) and the condenser (S), and a heat exchanger (H) is provided by a temperature indicator controller (7) in the room (R). In the dehumidifier with a room temperature control function installed in the room (R) for adjusting the amount of the medium of (H) and adjusting the operating state of the compressor (P) by the humidity indicator controller (9), the dehumidifier (3 ), The radiant cooling / heating panel (8) installed in the room (R) in which the medium from the heat storage source (W) circulates
When the room temperature and humidity at which radiant cooling and heating panel (8) surface is formed are detected, only the dehumidifier (3) is operated, and the radiant cooling and heating panel (8) surface is free from dew condensation. When the switch is detected, the switching instruction controller (4) causes the medium from the heat storage source (W) to flow to the radiant cooling / heating panel (8) and also has a switching valve for switching the medium to the heat exchanger (H). An air conditioning system having a dehumidifier (3) with a regulating function. 2. The heat storage source (W) comprises an air-cooled chiller (1) for cooling or heating a medium circulating through each component of the present system, and a cold / hot water tank (2) for storing the medium. A cooling and heating system having a dehumidifier (3) with a room temperature control function according to claim 1. 3. The radiant cooling / heating panel (8) is divided into a plurality of parts, and each divided radiant cooling / heating panel (8) is connected in parallel via a valve to a common introduction conduit (18, 19) for circulating a medium. The cooling system having the dehumidifier (3) with a room temperature control function according to claim 1 or 2, which is characterized by being provided. 4. The switching valve comprises an electric valve (V1) for opening and closing an introduction conduit (18) for circulating the medium to the radiant cooling and heating panel (8) and an introduction conduit (19) for circulating the medium to the dehumidifier (3). 4. An electric valve (V2) for opening and closing the valve, the switching instruction adjuster (4) being capable of switching these electric valves (V1, V2). A cooling system having the dehumidifier (3) with room temperature control function according to the item. 5. The heat storage source (W) comprises an air-cooled chiller (1) for heating a medium circulating through each component of the present system and a cold / hot water tank (2) for storing the medium, and heating is performed at room temperature. A heating system having a dehumidifier with room temperature control function (3), characterized in that the dehumidifier with control function (3) is stopped and the conduit is switched so that only the radiation cooling / heating panel (8) is used.