JPH0776628B2 - Air-conditioning dehumidification system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air conditioning heating / dehumidifying system, and more particularly to a chilling unit including an air-cooled hot water unit, an air-cooled cold / hot water unit, a water-cooled cold water unit, and an air-cooled cold water unit. And a plurality of heat exchangers as indoor units, and a supply selection provided between the chilling unit and the indoor unit, and at least one of cold water and hot water generated in the chilling unit is selectively supplied to the plurality of heat exchangers. The present invention relates to an air conditioning heating / dehumidifying system having means and a circulation pump for circulating cold water and hot water between them.

[Prior Art] Conventionally, there is an air conditioning heating / dehumidifying system shown in FIG. This is provided with a heat storage tank 44 for hot water and a heat storage tank 45 for cold water,
The hot water heat storage tank 44 is provided with a hot water header 34, and the cold water heat storage tank 45 is provided with a cold water header 35.
The valve 5 and the fan coil units 32 installed in plural units are connected via valves 30 and 31. In this example, by opening the valve 30 and closing the valve 31, hot water is supplied to the fan coil unit 32, and conversely, by opening the valve 31 and closing the valve 30, cold water is supplied to the fan coil unit 32. .

Further, two air-cooling type hot water chilling units 39, 40 are connected to the hot water heat storage tank 44, and the warm water that has been cooled is heated again and supplied to the hot water heat storage tank 44.

Further, the cold water heat storage tank 45 is provided with a water-cooled cold water chilling unit 41 and an air-cooled cold water chilling unit 42 so that the warmed cold water is cooled again and supplied to the cold water heat storage tank 45. A cooling tower 43 is provided in the water-cooling type cold water chilling unit 41 to cool the cooling water of the cold water chilling unit 41. Further, valves 44 to 48 are provided in each of the chilling units 39 to 42, and the valves are opened and closed depending on the operating state of the chilling units 39 to 42. In the figure, reference numeral 46 indicates a fan convector for heating only, and 49 indicates a valve for the fan convector.

According to such a cooling and heating dehumidification system, at the time of cooling, the cold water chilling units 41 and 42 are operated according to the required capacity, the cold water is supplied to the cold water heat storage tank 45, and the valve 31 is opened to open the fan coil unit. 32 can be supplied with cold water. On the other hand, at the time of heating, the hot water chilling unit is operated to supply the hot water to the hot water heat storage tank 44 and open the valve 30, whereby the hot water can be supplied to the fan coil unit 32.

Then, at the time of dehumidification, the cold water chilling units 41, 42 and the heating chilling units 39, 40 are operated to supply cold water to the cold water heat storage tank 45 and to supply hot water to the hot water heat storage tank 44.
By appropriately opening the valves 30 and 31, cold water or hot water can be supplied to the fan coil unit 32. Therefore, the fan coil unit 32 supplied with cold water
Can cool the room air to lower the humidity, raise the room temperature by the fan coil unit to which hot water is supplied, set the room heat balance to 0, and dehumidify the room without lowering the temperature.

[Problems to be Solved by the Invention] By the way, in the case of performing cooling and heating operations in response to the weather in Japan, the conventional cooling and heating dehumidification system described above has a chilled water chilling unit and Since it is necessary to set the capacity of the hot water chilling unit,
Each of them has to improve their abilities, and it means that it is only at one time that they are fully exerting their abilities when looking through the year.

Also, the dehumidifying operation conditions vary from high temperature and high humidity to low temperature and high humidity, and it is necessary to greatly change the operating state (capacity) of the hot water chilling unit and the cold water chilling unit depending on the respective conditions. However, there is a problem that the equipment becomes large in scale because the chilling units of (1) have to be upgraded separately.

Therefore, the present invention does not need to increase the capacity of each chilling unit up to the maximum load, and makes it possible to make the temperature difference between the inlet / outlet of cold / hot water to the supply selecting means larger than that of the conventional system. It is an object of the present invention to provide an air conditioning heating / dehumidifying system capable of appropriately performing necessary and sufficient air conditioning and dehumidifying.

[Means for Solving the Problems] Means for solving the above problems in the present invention are, as shown in FIG. 1, an air-cooled hot water unit 1, an air-cooled cold / hot water unit 2, and a cooling tower 5. A chilling unit for supplying cold water and hot water, which includes a water-cooled cold water unit 3 having a shutoff valve 14 for the cooling tower 5, a condenser 3a and a cooler 3b in the main body, and an air-cooled cold water unit 4; Multiple heat exchangers as a unit 11,1
2, a supply selecting means 10 provided between the chilling unit and the indoor unit, and supplying at least one of cold water and hot water generated in the chilling unit to the plurality of heat exchangers by selection, and between these A cooling and heating dehumidification system having circulation pumps 8 and 9 for circulating cold water and hot water, wherein a cold water outlet 10a of the supply selecting means 10 is connected to an inlet 3c of a cooler 3b of the water cooling type cold water unit 3. 3b
To the outlet 3d of the air-cooled cold water unit 4 and the cold water outlet 4b of the air-cooled cold water unit 4 to the cold water inlet 10c of the supply selection means 10, the condenser of the water-cooled cold water unit The inlet 3e of 3a is connected to the hot water outlet 10b of the supply selection means 10 and the outlet 5b of the cooling tower 5, the outlet 3f of the condenser 3a is connected to the inlet 1a of the air-cooled hot water unit 1, and the outlet of the air-cooled hot water unit 1 is connected. The inlet 5a of the cooling tower 5 and the hot water inlet 10d of the supply selecting means 10 are connected to 1b, and the outlet 3f of the condenser 3a and the air-cooling type cold / hot water unit 2 are connected.
Is connected to the inlet 2a of the air cooling type cold / hot water unit 2 via the opening / closing means 6 and the outlet 3d of the cooler 3b of the water cooling type cold water unit 3 is connected to the inlet 2a of the air cooling type cold / hot water unit 2 via the opening / closing means 6. The above-mentioned supply selecting means is provided at the cold / hot water outlet 2b of the cold / hot water unit 2.
That is, the ten hot water inlets 10d and the cold water inlets 10c are connected to each other through a distributing means 7 for distributing to either of these inlets.

[Operation] According to the present invention, the capacity of each unit is selected by selecting whether to open / close the opening / closing means 6 and the distribution means 7, and to select the distribution, and to switch the cold / hot water of the air-cooling type cold / hot water unit and the operation / stop of each unit. It is possible to perform a large air conditioning capacity and a dehumidifying operation in various states without increasing the value so much.

[Embodiment] A first embodiment of a cooling and heating dehumidification system according to the present invention will be described below with reference to the drawings. 1 to 9 show the first embodiment of the cooling and heating dehumidification system according to the present invention. As shown in FIG. 1, the cooling and heating dehumidification system in this embodiment includes an air-cooled hot water unit 1 that generates hot water as an outdoor unit, an air-cooled cold / hot water unit 2 that generates cold water or hot water by switching, and a cooling tower. 5, shut-off valve 14 to the cooling tower 5, condenser in the body
A chilling unit having a water-cooling type cold water unit 3 for generating cold water and an air-cooling type cold water unit 4 for generating cold water is provided. And two natural convection radiation type heat sinks and radiators which are heat exchangers as indoor units
11 and 12 are provided. This natural convection radiation type heat sink / radiator 11,12
The heat exchanger is exposed and water vapor in the air will condense on this surface during cooling.Therefore, there is a pan 11a, 12a for receiving this condensed water at the bottom of the heat exchanger. Is effectively extracted. Although two heat exchangers are shown in this embodiment, a plurality of heat exchangers may be used.

Further, between the chilling unit and the indoor unit, at least one of cold water and hot water generated in the chilling unit is selectively supplied to the heat exchangers of the two natural convection radiating heat radiators / radiators 11 and 12. A supply selection means 10 is provided. The supply selecting means 10 is, as shown in FIG. 1, a valve 15a, 15b for supplying hot water to the natural convection radiation type heat sinks and radiators 11, 12.
Valves 16a, 16b for discharging hot water, valve 1 for supplying cold water
7a, 17b and valves 18a, 18b for discharging cold water, and as shown in FIGS. 6 to 9, natural convection radiation type heat sink / radiator 1
When supplying hot water to both 1 and 12 (Fig. 6, during heating),
When supplying cold water to both the natural convection radiant heat absorbers and radiators (Fig. 7, during cooling), warm water to the natural convection radiant heat absorbers and radiators 12 and to the natural convection radiant heat absorbers and radiators 12 When supplying cold water (Fig. 8, during dehumidification) and vice versa, when supplying cold water to the natural convection radiation type heat sink / radiator 11 and hot water to the natural convection radiation type heat sink / radiator 12 (Fig. 9, dehumidification) Depending on
Each valve is opened and closed as shown in each figure. In this embodiment, a hot water circulation pump 8 and a cold water circulation pump 9 are provided for each case and the operation is stopped as necessary.

In the present embodiment, as shown in FIG. 1, the chilling unit connects the cold water outlet 10a of the supply selecting means 10 to the inlet 3c of the cooler 3b of the water-cooled cold water unit 3, and the outlet 3 of the cooler 3b.
The cold water inlet 4a of the air-cooled cold water unit 4 is connected to d. Further, the cold water outlet 4b of the air cooling type cold water unit 4 is connected to the cold water inlet 10c of the supply selecting means 10, and the inlet 3e of the condenser 3a of the water cooling type cold water unit is connected to the hot water outlet 10b of the supply selecting means 10 and the cooling tower 5. The outlet 5b is connected, the outlet 3f of the condenser 3a is connected to the inlet 1a of the air-cooled hot water unit 1, and the outlet 1b of the air-cooled hot water unit 1 is connected to the inlet 5a of the cooling tower 5 and the hot water inlet 10d of the supply selecting means 10. Then, at the outlet 3f of the condenser 3a, the air-cooling type cold / hot water unit 2
2a is connected via a switching valve 6 which is an opening / closing means. Furthermore, the outlet 3d of the cooler 3b of the water-cooled cold water unit 3 is connected to the inlet 2a of the air-cooled cold / hot water unit 2 via a switching valve 6 which is an opening / closing means, and the air-cooled cold / hot water unit 2 is connected.
The cold / hot water outlet 2b of the hot water inlet 10d of the supply selecting means 10
Also, the cold water inlet 10c is connected via two valves 7a and 7b which are distribution means for distributing the cold water inlet 10c to either of these inlets. In this embodiment, various operating states are realized by selecting open / close of the switching valve 6 and the valves 7a and 7b, switching cold / hot water of the air-cooling type cold / hot water unit, and selecting whether to operate or stop each unit.

The operation of the cooling and heating dehumidification system according to this embodiment will be described below.

During heating operation During heating operation, the water-cooled cold water unit 3 and the air-cooled cold water unit 4 are not operated, and as shown in FIG. 2, the cold / hot water unit 2 is set to hot water operation and the outlet of the condenser 3a is switched by the switching valve 6. 3f and the inlet 2a of the cold / hot water unit 2 are connected, and the valve 7a is opened and the valve 7b is closed to
Supply the outlet 2b of the hot water unit 2 to the hot water inlet 10 of the selection means 10.
The shielding valve 14 of the cooling tower 5 is closed while being connected to d. Then, the hot water cooled from the hot water outlet 10b of the supply selecting means 10 by the operation of the circulation pump 8 passes directly through the condensing part 3a of the water-cooled cold water unit 3, and a part of the cold / hot water unit 2 is in heating operation. Enter and be warmed. The other hot water enters the air-cooled hot water unit 1 to be warmed, and the hot water from both units 1 and 2 is supplied to the hot water inlet 10d. At this time, if the capacity of the hot water unit 1 is set larger than the capacity of the cold / hot water unit, the heating capacity is "strong" (both units 1 and 2 operation), "medium" (only the air-cooled hot water unit 1 operates), "weak". ”(Only the cold / hot water unit 2 is operated). At this time, the indoor unit is in the heating state by opening and closing the valve of the supply selecting means 10 as described above.

During cooling operation During cooling operation, the air-cooled hot water unit 1 is not operated.
Then, as shown in FIG. 3, the cold / hot water unit 2 is set to the cold water operation, the outlet 3d of the cooler 3b and the inlet 2a of the cold / hot water unit 2 are connected by the switching valve 6, and the valve 7a is closed. 7b is opened, the outlet 2b of the cold / hot water unit 2 is connected to the cold water inlet 10c of the supply selecting means 10, and the shutoff valve 14 of the cooling tower 5 is opened. Then, the cold water warmed from the cold water outlet 10a of the supply selecting means 10 by the operation of the circulation pump 9 is cooled by the water cooling type cold water unit 3
Enters into the cooling unit 3b of FIG. 2 and is cooled, and a part thereof enters into the cold / hot water unit 2 that is operating in cold water, and is further cooled. Also,
Other cold water enters the air-cooled cold water unit 4 to be cooled,
Cold water from both units 2 and 4 is supplied to the cold water inlet 10c.
At this time, if the capacity of the cold water unit 4 is set to be larger than that of the cold / hot water unit 2, the cooling capacity is “strong” (3 units 2, 3, 4 operation), “medium I” (cold water type cold water unit 3 and air cooling). Type cold water unit 4 operation), "Medium II" (cold / hot water unit 2 and water cooling type cold water unit 3 operation), "weak I" (only water cooling type cold water unit 3 operates), "weak II" (cold / hot water unit 2) It is possible to perform switching operation in five ways (only operation). At this time, in the indoor unit, the valve of the supply selecting means 10 is opened and closed to be in the cooling state as described above.

Dehumidification operation I The air-cooled hot water unit 1 and the cold / hot water unit 2 are not operated. The shutoff valve 14 is closed and the pump 13 is off. Then, as shown in FIG. 4, the switching valve 6 connects the outlet 3d of the cooler 3b and the inlet 2a of the cold / hot water unit 2, closes the valve 7a, opens the valve 7b, and The outlet 2b of the hot water unit 2 is connected to the cold water inlet 10c of the supply selecting means 10 and the shutoff valve 14 of the cooling tower 5 is opened. Then, by the operation of the circulation pump 9, the warm cold water from the cold water outlet 10a of the supply selecting means 10 is
It enters the cooling section 3b of the water-cooled cold water unit 3 and is cooled, and part of it enters the cold / hot water unit 2 which is in cold water operation. Further, the other cold water enters the air-cooled cold water unit 4 and passes through it, and the cold water from both units 2 and 4 is supplied to the cold water inlet 10c. Then, in this case, the circulation pump 8 for hot water is operated, and the hot water having obtained heat in the condenser 3a is supplied to the hot water inlet 10d of the supply selecting means 10. At this time, the indoor unit supplies the hot water to one of the natural convection radiation type heat sinks and radiators and the cold water to the other while keeping the dehumidifying state by opening and closing the valve of the supply selecting means 10 as described above. As a result, the room can be dehumidified. At this time, by stopping the operation of the air-cooling type cold water unit 4, it is possible to switch between "dehumidification" (stopping the air-cooling type cold water unit 4) and "cooling dehumidification and weak heating" (operation of the air-cooling type cold water unit 4).

At this time, if the shutoff valve 14 is opened in each state and the cooling tower 5 is operated with the pump 13 turned on, the temperature of the hot water further decreases, so that the indoor temperature can be further reduced.

Dehumidification operation II Use all units 1, 2, 3, and 4. Then, as shown in FIG. 5, the cold / hot water unit 2 is set to hot water operation, and the switching valve 6 connects the outlet 3f of the condenser 3a and the inlet 2a of the cold / hot water unit 2 with the valve 7a opened. 7b is closed, the outlet 2b of the cold / hot water unit 2 is connected to the hot water inlet 10d of the supply selecting means 10, and the shutoff valve 14 of the cooling tower 5 is closed. Then, the circulating pump 9
The chilled water warmed from the chilled water outlet 10a of the supply selecting means 10 by the operation of the above enters the cooler 3b of the water-cooled chilled water unit 3, is cooled, enters the air-cooled chilled water unit 4 and is further cooled, and is cooled from the air-cooled chilled water unit 4. Cold water is supplied to the cold water inlet 10c of the supply selecting means 10. Then, in this case, the circulation pump 8 for hot water is operated, and the hot water obtained by the heat of the condenser 3a is passed through the air-cooled hot water unit 1 and the hot water inlet 10d of the supply selecting means 10 is supplied.
Supply to. At this time, the indoor unit keeps the dehumidifying state by opening and closing the valve of the supply selecting means 10 as described above, and supplies hot water to either one of the natural convection radiation type heat sinks and radiators and cold water to the other. It is possible to dehumidify the room.

Assuming the operation of the cold / hot water unit 2 and the water-cooled cold water unit 3, there are four ways by stopping the operation of the air-cooled hot water unit 1 and the air-cooled cold water unit 4, that is, "cooling dehumidification weakness and heating strength I" (air-cooled hot water Unit 1 and air-cooled cold water unit 4 stop), "Cooling dehumidification weakness and heating strength II" (air-cooled hot water unit 1 operation, air-cooled cold water unit 4 stopped),
"Cooling dehumidification strength and heating strength I" (air-cooling hot water unit 1 stop, air-cooling cold water unit 4 operation), "cooling dehumidification strength and heating strength II" (air-cooling hot water unit 1 operation, air-cooling cold water unit 4 operation) You can take action. Also here, if the cooling tower 5 is operated and the shutoff valve 14 is opened, the temperature of the hot water further decreases, so that the indoor temperature can be further lowered.

Therefore, according to the present embodiment, the switching valve 6 and the valve 7a, 7b of the distribution means are selected to be opened / closed, the cold / hot water of the air-cooling type cold / hot water unit 2 is switched, and the operation of each unit 1, 2, 3, 4 is performed.
By selecting the stop, the capacity of each unit is not increased so much, and the temperature difference between the inlet and outlet of the cold / hot water to the supply selecting means can be made larger than that of the conventional system, and it is necessary and appropriate. It is possible to perform sufficient air conditioning and dehumidifying operation in various states.

FIG. 10 shows a second embodiment of the cooling and heating dehumidification system according to the present invention. In this embodiment, the outdoor unit is the first
The structure is substantially the same as that shown in the embodiment. The capacity ratio of the air-cooled hot water unit 1, the air-cooled cold / hot water unit 2, the water-cooled cold water unit 3, and the air-cooled cold water unit 4 is about 2: 1: 2: 1, and the switching valve 6 has two capacity ratios. Two-way valves 6a and 6b are provided.

In the present embodiment, as the supply selection means, the hot water heat storage tank 51, the cold water storage heat tank 52, the hot water header 53, the cold water header 54, and the natural water convection radiation type heat absorption / release from the hot water header 53 and the cold water header 54. Cooling provided in the middle of the piping connected to the vessel 61
It has hot water switching valves 57, 58, 59, 60 and a circulation pump 63. Further, in this embodiment, the natural convection radiation type heat sink / radiator 61 has three
A system is provided, and in addition to that, one system of natural convection radiation type radiator 60 for heating is provided (in the same figure, one system is represented by one unit). The natural convection radiant heat radiator / radiator 61 and the natural convection radiant radiator 60 have a water temperature sensor 64 for detecting the temperature of the water supplied and a three-way valve 65 for bypassing and circulating cold / hot water. Shall be provided.

In this embodiment, in order to automatically control the cooling and heating dehumidification system, the outside air temperature sensor 71 for detecting the temperature of the outside air,
It has a humidity sensor 72 for detecting indoor humidity and the above-mentioned water temperature sensor 64, each unit 1, 2, 3, 4 and valves 6a, 6b, 7a, 7b, 14, based on each data detected by these. 57,58,
Control 59,60,65. Control of these units 1, 2, 3, 4 and the valves 6a, 6b, 7a, 7b, 14 of the outdoor unit are performed by the heat source controller 66, 67 for hot and cold water, and the valves 57, 58, 5 in the room.
The control of 9,60,65 is the outside air controller for winter and summer 68,69
And humidity controller 70.

Next, the operation of this embodiment will be described. The basic operation is the same as that shown in the first embodiment described above, and the heating operation described above is performed under conditions such as indoor temperature and humidity and outside air temperature.
The operation during the cooling operation, the dehumidifying operation I and the dehumidifying operation II and each operation mode during each operation are automatically controlled and performed. In other words, when heating or cooling, set to "strong", "medium", or "weak" strength as required, or when bypass cold / hot water is returned by the three-way valve to warm the cold water, or when the hot water is cooled. Control to supply cold / hot water from each header to. During dehumidification, the operation modes of dehumidification operation I and dehumidification operation II are executed as necessary. For example, when the temperature is particularly high and the cooling dehumidification is desired to be strengthened, the operation of the above-described dehumidifying operation I "cooling dehumidifying strength and heating strength I" (air-cooled hot water unit 1 stop, air-cooled cold water unit 4 operation) is performed, If you want to perform dehumidification while heating at a low temperature, perform the "Cooling dehumidification weakness and heating strength II" of dehumidification operation II described above.
(Air-cooled hot water unit 1 operation, air-cooled cold water unit 4 stop) operation is performed.

Therefore, according to the present embodiment, it is possible to automatically perform a large air conditioning capacity and an optimum dehumidifying operation in various states without increasing the capacity of each unit.

[Effects of the Invention] As described above, according to the cooling / heating dehumidifying system of the present invention, the selection of the opening / closing means and the distribution means further switches the cold water / hot water of the air-cooling type cold / hot water unit and operates / stops each unit. By selecting the above, the capacity of each unit does not need to be increased so much, and the temperature difference between the inlet and outlet of cold / hot water to the supply selection means can be made larger than that of the conventional system so that it is appropriate, necessary and sufficient. It is possible to perform various air conditioning and dehumidifying operations in various states.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a cooling and heating dehumidification system according to the present invention, FIGS. 2 to 9 are diagrams showing the operation of the cooling and heating dehumidification system shown in FIG. 1, and FIG. 10 is the present invention. The figure which shows the 2nd Example of the heating / cooling dehumidification system which concerns on this, and FIG. 11 is a figure which shows the conventional cooling / heating dehumidification system. 1 ... Air-cooled hot water unit 2 ... Air-cooled cold / hot water unit 3 ... Water-cooled cold water unit 4 ... Air-cooled cold water unit 5 ... Cooling tower 6 ... Opening / closing means 7 ... Sorting means 8, 9 ... Circulation Pump 10 …… Supply selection means 11, 12 …… Heat exchanger (Natural convection radiation absorption / radiation device) 14 …… Shield valve

Claims (1)

[Claims] 1. An air-cooled hot water unit (1) and an air-cooled cold / cooling unit.
A water-cooled cold water unit (3) having a hot water unit (2), a cooling tower (5), a shutoff valve (14) for the cooling tower (5), and a condenser (3a) and a cooler (3b) in the main body. And an air-cooled chilled water unit (4),
Chilling unit for supplying cold water and hot water, and multiple heat exchangers (11), (12) as indoor units
And a supply selection means (10) provided between the chilling unit and the indoor unit, for selecting and supplying at least one of cold water and hot water generated in the chilling unit to the plurality of heat exchangers, A cooling and heating dehumidification system having circulation pumps (8), (9) for circulating cold water and hot water in the water cooling type cold water unit (3) at the inlet (3c) of the cooler (3b). The cold water outlet (10a) of (10) is connected, the cold water inlet (4a) of the air cooling type cold water unit (4) is connected to the outlet (3d) of the cooler (3b), and the air cooling type cold water unit (4) is connected. The cold water outlet (4b) of the above is connected to the cold water inlet (10c) of the supply selecting means (10), and the inlet (3e) of the condenser (3a) of the water cooling type cooling water unit is heated by the hot water of the supply selecting means (10). Exit (10b) and cooling tower (5) exit (5b) Connected, the outlet of the condenser of the (3a) air-cooled hot water unit (3f) (1)
Of the cooling tower (5) and the hot water inlet (10d) of the supply selecting means (10) are connected to the outlet (1b) of the air-cooled hot water unit (1). The outlet (3f) of (3a) and the inlet (2a) of the air-cooling type cold / hot water unit (2) are connected via the opening / closing means (6), and the inlet (2a) of the air-cooling type cold / hot water unit (2). ) Is connected to the outlet (3d) of the cooler (3b) of the water-cooled cold water unit (3) through the opening / closing means (6), and the cold / hot water outlet 2b of the air-cooled cold / hot water unit (2) is connected to the above. Hot water inlet (10d) and cold water inlet (1) of supply selection means (10)
The heating / cooling dehumidification system is characterized in that the heating / cooling dehumidification system is connected to 0c) via a sorting means (7) for sorting to either of the two inlets.