JPS6024907B2 - Heat recovery heating and cooling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat recovery heating and cooling device used in heating and cooling equipment.

Conventional heating and cooling systems of this type include water-cooled chiller units, closed cooling towers, heat recovery fan coil units,
It consists of a fan coil unit for air conditioning, a heat storage tank with a cold water tank and a hot water tank, and a pump and switching valve installed in the circuit that connects these famous devices to each other.During cooling operation, the system generates cold water from a closed cooling tower while generating scarlet heat. Perform cooling operation.

On the other hand, during heating operation, cold water is produced in the cold water tank, and hot water is produced in the hot water tank using the Chiranit condenser, and heating is performed while recovering pseudo-heat.

Furthermore, when conventional devices cannot recover waste heat, a large-capacity auxiliary heat source that can cover the entire heating load is required. In conventional air conditioning systems such as those mentioned above,
The heat storage tank consists of two tanks, a cold water tank and a hot water tank, and the water temperature in the hot water tank during heating must be at a high temperature of 40 q0 or more, so the difference in temperature used is 4.5 cm. Therefore, tens or hundreds of huge tanks are used. This not only requires a large amount of space, but also increases the cost of buildings and other equipment.

Also, in case heat recovery is not possible during heating,
Since a large-capacity auxiliary heat source is required to cover the entire heating load, the equipment costs are as high as without heat recovery. In view of the above, it is an object of the present invention to provide a heat recovery heating and cooling system that does not require a large-capacity heat storage tank or an auxiliary heat source. A water cooler and an expansion valve, a heat recovery chiller unit consisting of an evaporator and an expansion valve for heat recovery, a closed cooling tower unit, a heat recovery fan coil unit or air handling unit, a fan coil unit or air conditioning unit for heating and cooling A handling unit, a heat storage tank for heat recovery, an auxiliary heat source, and a pump and switching valve are installed in the circuits that interconnect these devices, and cooling and heating operations are performed by switching these switching valves. It is characterized by the ability to

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

In the figure, 1 is a chiller unit for heat recovery, and a compressor 1
01, each condenser 102, 103 for heating and scarlet heat,
It is composed of a cooling water cooler 106 having a solenoid valve 104 and an expansion valve 105, a heat recovery evaporator 109 having a solenoid valve 107 and an expansion valve 108, and check valves 110 and 111.

Reference numeral 2 designates a closed cooling tower having a tower pump 11, which is connected to an exhaust heat condenser 103 via a cooling water pump 7 and a three-way valve.

3 is a heat recovery fan coil unit connected to a heat recovery evaporator 109 and a heat recovery heat storage tank 5; It is connected to an auxiliary heat source 6 via a pump 10 and switching valves 18 and 20, respectively.

The heat storage tank 5 and the auxiliary heat source 6 are connected to the cooling tower 2 via switching valves 19 and 21, and are further connected to the three-way valve 13.
and is connected to a waste heat condenser 103 via a cooling water pump 7. Reference numeral 4 denotes a cooling/heating fan unit, which is connected to a cooling water cooler 106 via a switching valve 16, a cold/hot water pump 9, and a switching valve 14, and to a heating condenser 102 via a switching valve 17, a cold/hot water pump 9, and a switching valve 15. are connected to each.

Next, the operation of this embodiment configured as described above will be explained.

(i) Cooling operation During cooling operation, the chiller unit opens the solenoid valves 104 and 107 to connect the compressor 101 - heating condenser 102 - scarlet condenser 103 - "Solenoid valve 104 - expansion valve 105 - cooling water cooler 106" A refrigeration cycle consisting of a solenoid valve 107, an expansion valve 108, a heat recovery evaporator 109 and a compressor 101 is formed.

The cold soot gas discharged from the compressor 101 passes through the heating condenser, but since the switching valves 15 and 17 are closed, it is not condensed in the condenser 102, but is condensed in the scarlet heat condenser 103, and the condensation heat is operates the pumps 7 and 11, and the cooling water is transported to the cooling tower 2, where it is heated to a scarlet temperature. In addition, the pumps 8 and 9 are operated to send cold water cooled by evaporation of cold soot in the cooling water cooler 106 and the heat recovery evaporator 109 to the fan coil units 3 and 4 for cooling. At this time, the pump 10 is not operated. (ii) Intermediate period In the intermediate period, when heating and cooling are not required and only exhaust heat from a computer room, etc., is to be processed, the chiller unit 1 closes the solenoid valve 104 and opens the solenoid valve 107 to close the compressor 101-condenser 102,1.
03 - Solenoid valve 107 - Expansion valve 108 - Heat recovery evaporator 1
The cold soot gas that forms the refrigeration cycle of the 09-compressor and passes through the condenser 102 during cooling operation is transferred to the condenser 103.
The heat of condensation is conveyed to the cooling tower 2 by cooling water by operating the pumps 7 and 11, and is turned into a scarlet heat.

In addition, the pump 8 is operated to send cold water cooled by evaporation of the refrigerant in the heat recovery evaporator 109 to the fan coil unit 3 to cool the computer room and the like. At this time pump 9
, I don't drive until 1 river. (iii) Heating operation During heating operation, the chiller unit closes the solenoid valve 104,
107 is opened and the compressor 101 - condenser 102, 103 - solenoid valve 107 - expansion valve 108 all at once E heat evaporator 109 -
A refrigeration cycle of the compressor 101 is formed, and a heating condenser 1
The condensation heat generated in 02 is transferred to 1 by closing the switching valves 14 and 16.
By opening 5 and 17 and operating the pump 9, hot water is conveyed to the fan coil unit 4 and used for heating.

In addition, the cold water cooled by evaporation of the cooler in the heat recovery evaporator 109 is sent to the fan coil unit 3 by driving the pump 8, and cools the exhaust heat of the computer room, etc. When there is sufficient scarlet heat and the water temperature in the heat storage tank 5 is high, the switching valves 18 and 19 are activated.
, 20, and 21 and do not run the pump until 1 stream. 3 way valve 1
2 mixes the cold water from the fan coil unit 3 and the cold water from the heat storage tank 5 and maintains the temperature of the cold water to be sent to the evaporator 109 of the chiller unit at a constant temperature.

Next, when there is insufficient scarlet heat in the computer room or the like and the temperature of the basket heat tank 5 decreases, the switching valves 19 and 21 are opened to operate the cooling tower 2 and pump 10 to collect the insufficient exhaust heat from the outside air.

In this case, the pump 11 is not operated. According to the present invention, even if scarlet heat is insufficient as described above, heating can be performed without an auxiliary heat source by using a closed cooling tower to collect heat from the outside air in winter.

In addition, if brine is used as a heat medium in the heat recovery and scarlet heat systems, the heat storage tank 5 can be used up to a temperature of -100°C, and not only can heat be collected from the outside air even at around 5°C, but it can also be used during heating. , the heat storage tank 5 is -1ooC to +50q0
Since it can be used in a temperature range of about 100 yen, it only requires a small capacity, and the equipment cost is low. If the temperature of the heat storage tank 5 decreases even if heat is collected from the outside air, the switching valves 19 and 21 are closed, and the switching valve 1 is closed.
8 and 20 are opened to replenish the insufficient amount of heat with the auxiliary heat source 6.

If a solar heat collector is used as this auxiliary heat source, heating operating costs can be reduced. In addition, the Chira-Knit is equipped with a heat exchanger for heating and cooling and a heat exchanger for heat recovery, making it more compact and requiring less space for installation.

There are other effects.

[Brief explanation of drawings]

The drawing is a system diagram showing an embodiment of the heat recovery heating and cooling device of the present invention. 1...Chiller unit, 2...Cooling tower, 3,
4... Fan coil unit, 5... Heat storage tank, 6...
... Auxiliary heat source, 7-11 ... Pump, 14-
21...Switching valve, 101...Compressor, 10
2,103... Condenser, 105,108...
...Expansion valve, 106...Water cooler, 109.
·····Evaporator.

Claims (1)

[Claims] 1 In a heat recovery air conditioning system in which a compressor, condenser, evaporator, expansion valve, cooling tower, heat storage tank, pump, switching valve, heat recovery equipment, etc. are connected in a related manner to form a refrigeration cycle and a water side line, compression A heating condenser and an exhaust heat condenser are connected in series to the refrigerant gas discharge side of the machine, and the outlet side passage of the exhaust heat condenser is branched, and a solenoid valve and an expansion valve are installed in each branch passage. A cooling water cooler is connected to one branch passage through a series line, and a heat recovery evaporator is connected to the other branch passage. A heat recovery chiller unit whose passage is connected to the refrigerant gas suction side of the compressor via a check valve to form a refrigeration cycle, and a third pump connected to the water side passages of the heating condenser and cooling water cooler. A heating and cooling heat exchanger unit connected via a passage switching valve, a heat storage tank connected to the heat recovery evaporator via a second pump and a heat recovery heat exchanger, and the exhaust heat condenser and heat storage. A heat recovery heating and cooling system comprising: a cooling tower connected to the tank via a first pump and a passage switching valve; and an auxiliary heat source connected to the heat storage tank via a passage switching valve and a fourth pump.