KR101184336B1 - Hybrid type heating system - Google Patents

Abstract

The present invention relates to a hybrid cooling and heating system, and more particularly, a refrigeration module connected to the outlet side of the evaporator; A heat storage tank for supplying low temperature water to the condenser and storing the heated high temperature water through heat exchange with the condenser when the cooling operation or the refrigerating operation or both of them are operated; A floor heating module for supplying circulating water to the condenser and circulating floor heating water through heat exchange with the condenser; A hot water supply module for receiving hot water stored in connection with the heat storage tank or hot water circulated through heat exchange between the heat storage tank and the condenser; And control means equipped with a plurality of switching valves for selectively operating hot water supply operation, floor heating operation, refrigeration operation, and cooling operation. The system includes an integrated system for cooling, hot water supply, and heating. By consolidating the air conditioners and boilers used in one system, the installation space is reduced to secure the space for use in the room, the cost of system integration, and the amount of condensed heat generated from the operation of the cooling system in summer. The present invention relates to a hybrid type heating and cooling system that can convert thermal energy into heat energy and store high temperature water in a heat storage tank and, when necessary, increase the thermal efficiency due to an initial temperature rise of the hot water supply when water is supplied by the hot water supply module.

Description

Hybrid air-conditioning system {HYBRID TYPE HEATING SYSTEM}

The present invention integrates the system to enable cooling, hot water supply, and heating combined with a single system to reduce the installation space by integrating the air conditioner, boiler used in the home system, and to secure the indoor utilization space, the cost of the system integration To reduce heat, convert the heat of condensation generated in the summer cooling system into heat energy using a water-cooled condenser, which is a heat exchanger, to store the hot water in the heat storage tank, and if necessary, supply the water by the hot water supply module. The present invention relates to a hybrid cooling and heating system that can increase thermal efficiency.

For air conditioning in the summer used in homes, air conditioners are purchased and used only in summer.

For hot water supply, hot water and floor heating, a separate electric boiler or gas boiler has been installed and operated when necessary.

This method of use is to buy and install a product with only the necessary functions, the air conditioner used for cooling in the summer, despite the frequency of use, the problem of having to purchase expensive products,

When the air conditioner is operated, there is a problem in that the heat energy generated in the process of condensing the high-temperature, high-pressure gas refrigerant generated by the compressor in the condenser is exhausted to the outside to waste heat energy generated for cooling.

In addition, in the case of gas boilers used for hot water supply, hot water, and floor heating, carbon dioxide is emitted in the process of burning gas, thereby providing a cause of global warming.

In addition, by installing an air conditioner or a boiler in a separate room or a separate space, there is a problem in that the economic loss is large due to the cost of the purchase for each purchase and the cost for securing the installation space.

The present invention has been made to solve the above problems,

By integrating the system for cooling, hot water supply and heating, the air conditioner and boiler used in the home are integrated into one system to reduce the installation space to secure the indoor utilization space and reduce the cost of system integration.

Condensation heat generated during operation of the cooling system in summer is converted into thermal energy using a water-cooled condenser, which is a heat exchanger, to store hot water in the heat storage tank. One object is to provide a hybrid heating and cooling system that can be increased.

Furthermore, in the present invention, by introducing a subcooling degree circuit for lowering the temperature of the hot water supplied to the condenser from the heat storage tank to improve the refrigeration and cooling efficiency of the system during refrigeration and cooling operation,

In addition, by introducing a superheating circuit to increase the temperature of the gas refrigerant by supplying hot water, which is the circulating water of the condenser and the heat storage tank, to the gas refrigerant flowing into the compressor, it improves the water efficiency of the system during hot water supply and heating operation, and improves the system efficiency. Another object is to provide a hybrid heating and cooling system that can be maximized.

Hybrid type heating and cooling system according to the present invention is made through the heat exchange of the refrigerant circulating the expansion valve, evaporator, compressor, and water-cooled condenser for heating and cooling,

A refrigeration module connected to the outlet side of the evaporator; A heat storage tank for supplying low temperature water to the condenser and storing the heated high temperature water through heat exchange with the condenser when the cooling operation or the refrigerating operation or both of them are operated; A floor heating module for supplying circulating water to the condenser and circulating floor heating water through heat exchange with the condenser; A hot water supply module for receiving hot water stored in connection with the heat storage tank or hot water circulated through heat exchange between the heat storage tank and the condenser; And control means having a plurality of switching valves for selectively operating the hot water supply operation, the floor heating operation, the refrigeration operation, and the cooling operation.

The control means according to the present invention is connected to the condenser and the expansion valve, and connected to the first-three-way valve for controlling the hot water supply operation or cooling operation, the evaporator and the refrigeration module, and controls the refrigeration operation during hot water operation. A third three-way valve for connecting to the evaporator and a refrigeration module, a third three-way valve for controlling the refrigeration operation during a cooling operation, and a condenser and a floor heating module for heating and cooling And a third valve for controlling the hot water supply operation and the floor heating operation during operation, and a fifth valve for controlling the hot water operation, connected to the condenser, the hot water supply module, and the heat storage tank. do.

It is provided on the inlet side of the condenser according to the present invention, in the cooling operation or the refrigeration operation, or both of the operation, the gas refrigerant discharged by the evaporator is supplied by the first flow control valve to the condenser tank to the condenser It is further provided with a subcooling circuit for lowering the temperature of the supplied hot water,

It is provided at the inlet side of the compressor, and during the hot water supply operation or floor heating operation, or both of the operation, supply the hot water discharged from the condenser by the second flow control valve to control the temperature of the gas refrigerant flowing into the compressor It is characterized by further comprising a superheating circuit for raising.

It is further provided with a receiver for storing the liquid refrigerant discharged to the condenser according to the present invention,

Between the evaporator and the compressor is further provided a liquid separator for separating the liquid refrigerant contained in the gas refrigerant discharged from the evaporator,

On the discharge side of the compressor is further provided with an oil separator for separating the refrigerant and the evaporation component of the lubricant generated during the compression of the gas refrigerant,

The heat storage tank includes a circulation pump and a water supply valve connected to the circulation pump,

The water supply valve is connected to the hot water supply module to directly supply the hot water stored in the heat storage tank at the hot water supply rate,

The floor heating module includes a pipe for circulating heating water, a floor heating storage tank connected to the pipe to store heating water, a circulation pump connected to the storage tank to supply heating water to the heat storage tank circulation, and It is connected to the storage tank is characterized in that it comprises a water supply valve for replenishing the heating water.

Hybrid type heating and cooling system according to the present invention by integrating the system to enable cooling, hot water, and heating to combine the air conditioner, boiler used in the home into a single system to secure the space of the room by reducing the installation space, The cost of system integration can be reduced.

In addition, the amount of heat condensation generated during operation of the cooling system in summer is converted into thermal energy using a water-cooled condenser, which is a heat exchanger, to store hot water in the heat storage tank. Can be increased.

In addition, by using a water-cooled condenser, heat dissipation of condensation heat generated in the condenser can be reduced, thereby reducing the discharge of heat released to the outside, and by eliminating the gas boiler, it is possible to reduce the amount of carbon dioxide emitted during the combustion of the boiler. .

In addition, by using the endothermic effect during the evaporator evaporator during hot water supply and floor heating operation, it is possible to maximize the energy utilization of the system by installing a separate refrigeration and freezer.

Furthermore, in the present invention, by introducing a subcooling degree circuit for lowering the temperature of the hot water supplied to the condenser from the heat storage tank to improve the refrigeration and cooling efficiency of the system during refrigeration and cooling operation,

In addition, by introducing a superheating circuit to increase the temperature of the gas refrigerant by supplying hot water, which is the circulating water of the condenser and the heat storage tank, to the gas refrigerant flowing into the compressor, it improves the water efficiency of the system during hot water supply and heating operation, and improves the system efficiency. It can be maximized.

1 is a flowchart showing a main operation mode for controlling a hybrid heating and cooling system according to the present invention;
2 and 3 is a system diagram and flute chart during hot water supply operation alone by the hybrid type heating and cooling system according to the present invention,
4 and 5 is a system diagram and a flow chart during the cooling operation alone by the hybrid type heating and cooling system according to the present invention,
6 and 7 is a system diagram and flowchart of the floor heating alone operation by the hybrid type heating and cooling system according to the present invention,
8 and 9 are system diagrams and flowcharts during refrigeration alone operation by a hybrid air-conditioning system according to the present invention.

A hybrid type air conditioning system according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 1 to 9 hybrid type heating and cooling system according to the present invention

Through heat exchange of refrigerant circulating through expansion valve, evaporator, compressor, and water-cooled condenser (hereinafter referred to as 'water-cooled heat exchanger') for heating and cooling,

A refrigeration module (RM) connected to the outlet side of the evaporator; A heat storage tank for supplying low temperature water to the condenser and storing the heated high temperature water through heat exchange with the condenser when the cooling operation or the refrigerating operation or both of them are operated; A floor heating module (FHM) for supplying circulating water to the condenser and circulating floor heating water through heat exchange with the condenser; A hot water supply module (WSM) for receiving hot water stored in connection with the heat storage tank or hot water circulated through heat exchange between the heat storage tank and the condenser; And control means having a plurality of three-way valves for selectively operating the hot water supply operation, the floor heating operation, the refrigeration operation, and the cooling operation.

First, the hybrid air-conditioning system according to the present invention includes a main body B including an expansion valve EV_0, an evaporator Eva_0, a compressor, and a water-cooled condenser,

It consists of an indoor unit composed of expansion valves (EV_1, EV_2) and evaporators (Eva_1, Eva_2) connected to the condenser of the main body (B) for cooling the room.

And the control means according to the present invention includes a three-way valve, a check valve, a water supply valve, a flow control valve,

Hereinafter, these valves and the control means for controlling them will be described separately by hot water operation, cooling operation, floor heating operation and refrigeration operation mode.

1. Single operation of the hot water supply module (WSM) (shown in Figures 1 to 3)

FIG. 2 is a hot water supply operation for producing hot water supply water by supplying hot water and heat exchanger by heat exchange with hot water and high pressure gas refrigerant discharged from the compressor into a water-cooled condenser. Shows the flow of refrigerant and the flow of hot water.

When the hot water operation mode is activated, two compressors (COMP) are operated at the same time, and during the gas refrigerant discharged by the compressor (COMP) there is a liquid refrigerant that is not completely gasified during the compression process,

In order to separate the liquid refrigerant, a liquid separator (AC: Accumulate) is provided at the inlet side of the compressor to separate the liquid refrigerant which is not completely gasified, and the low-temperature low-pressure gas refrigerant composed only of the complete gas is introduced into the compressor.

The low-temperature low-pressure gas refrigerant sucked into the compressor (COMP) is sensible heat change to a high-temperature high-pressure gas refrigerant by the operation of the compressor, and then discharged from the compressor,

Gas refrigerant of high temperature and high pressure is controlled by the check valve (CV_1, CV2: Check Valve) provided in each compressor to flow the gas refrigerant flows into the oil separator (OS: Oil Separator).

The oil separator (OS) is a high-temperature, high-pressure gas refrigerant discharged from the compressor includes the evaporation component of the lubricating oil generated by the operation of the compressor, so that the refrigerant component and the lubricating oil component is recovered and reused, only the high-temperature high-pressure gas refrigerant component Allow discharge from the oil separator.

The high temperature and high pressure gas refrigerant discharged from the oil separator (OS) is introduced into the water-cooled heat exchanger (Condenser) as a high temperature gas to change the latent heat into the liquid refrigerant of the high temperature and high pressure lowered when introduced by hot water and heat exchange and condensation After

Discharged by the heat exchanger is introduced into the receiver (RT: Receiver Tank).

In this case, the high temperature and high pressure gas refrigerant flows into the refrigerant inlet of the water-cooled heat exchanger (Condenser), and is latent heat-changed into the high temperature and high pressure liquid refrigerant and discharged to the discharge port.

The low temperature water supply water flows into the water supply inlet opposite the refrigerant inlet, and the hot water supply water and the high temperature gas refrigerant are sensitized to high temperature through heat exchange by heat exchange coils provided inside the water-cooled heat exchanger. It is discharged to the discharge port.

The liquid refrigerant of the high temperature and high pressure stored in the receiver RT is controlled by the flow direction of the refrigerant through ON / OFF control of the first three-way valve (3WV_1: 3 Way Valve) for hot water supply operation and cooling operation. The flow of refrigerant is determined.

That is, in the case of hot water supply operation, the 1-3 way valve (3WV_1) is turned off to control the flow direction of the refrigerant toward the evaporator (Eva_0) built in the main body B.

In the case of the cooling operation, the third-way valve (3WV_1) is turned on to control the flow direction of the refrigerant to the evaporators Eva_1, Eva_2, ... of the cooling system constructed indoors.

The high temperature and high pressure liquid refrigerant in the receiver (RT) by turning off the first-three-way valve (3WV_1) is primarily a low pressure wet air by an expansion valve (EV_0) for low pressure to facilitate evaporation. Changed to a state,

At this time, the high temperature and high pressure liquid refrigerant is latent heat change into the low temperature low pressure gas refrigerant by the heat exchange action and flows into the evaporator Eva_0 and is discharged from the evaporator.

The low-temperature low-pressure gas refrigerant discharged from the evaporator Eva_0 controls the flow direction of the refrigerant by selecting the use of the refrigeration module RM (refrigerator) and the bypass circuit by the second-three-way valve 3WV_2. Done.

When the temperature sensor built in the refrigerating module RM exceeds the target temperature, the low-temperature low-pressure gas refrigerant discharged from the evaporator Eva_0 is introduced into the refrigerating module RM by turning off the 2-3 valve 3WV_2. To achieve the function of freezing and refrigeration,

When the target is achieved, the low-temperature and low-pressure gas refrigerant discharged from the evaporator Eva_0 by turning on the second-three-way valve (3WV_2) is passed to the liquid separator (AC: Accumulator) through the bypass circuit through the check valve CV_4. Inflow.

The liquid separator (AC) separates the liquid refrigerant and discharges only the gas refrigerant to the compressor (COMP). A temperature sensor (TS_2) and a superheating circuit (S_Heat) are installed between the compressor and the liquid separator to provide a hot water temperature. Superheat control is performed for improvement.

That is, the low-temperature low-pressure gas refrigerant from which the liquid refrigerant is separated from the liquid separator (AC) passes through a superheating circuit (S_Heat: Super Heating Circuit) capable of raising the temperature of the gas refrigerant flowing into the compressor. After controlling the temperature of

It is introduced into the compressor to increase the temperature of the gas refrigerant discharged from the compressor.

Therefore, when the superheating circuit is compressed by flowing into the compressor while raising the temperature of the low-temperature low-pressure gas refrigerant flowing into the compressor (COMP),

In the compression process by the compressor, it is possible to produce a gas refrigerant having a temperature increased by a change corresponding to the elevated temperature by the superheat degree control, and thus, an improvement effect of the hot water temperature can be exhibited.

In order to control the superheat degree, an error value is generated by setting a target temperature of the superheat degree and comparing the output value of the temperature sensor TS_2 for measuring the target temperature and the temperature of the gas refrigerant returning to the compressor,

The error value is used to generate a control input of the second flow control valve FCV_2 for controlling the flow rate of the hot water supply water.

The second flow control valve FCV_2 flows the gas coolant and the hot water supply water by supplying the hot water supply water discharged from the water-cooled heat exchanger to supply the flow rate required for superheat control to the superheating circuit S_Heat. It is possible to increase the temperature of the gas refrigerant through the.

At this time, the water storage sensor is provided inside the heat storage tank to check the storage amount. When the hot water supply level is the lower limit value, the water supply valve (VA_1: Feed Valve) is turned ON to supply water from the water supply source. In this case, the water supply valve VA_1 is turned off to cut off the water supply.

In this case, when the hot water operation is activated, the hot water circulation pump (CP1: Circulation Pump) connected to the hot water storage tank is turned on to circulate the hot water in the storage tank to overcool through the check valve (CV_9). Pass through Super Cooling Circuit (S_Cool) and flow into water-cooled heat exchanger (Condenser).

It is not necessary to operate the subcooling circuit (S_Cool) in the hot water supply mode, and when the cooling and refrigeration modes are operated, the supercooling degree is controlled by using a first flow control valve (FCV_1) to control the cooling and refrigerating effects. It can be improved.

In the water-cooled heat exchanger (Condenser), the hot water outlet temperature of the water-cooled heat exchanger rises to a higher temperature than the inlet temperature by heat exchange between the gas refrigerant and the hot water of the hot water, and the third and third valves (3WV_4) for controlling floor heating and hot water supply. Flows into the supply side.

The fourth-three-way valve (3WV_4) is OFF when the hot water, and when the floor heating is turned on to control the flow direction of hot water,

When the hot water mode operation is performed by turning off the fourth-3 way valve 3WV_4, the high temperature water flows into the next 5-3 way valve 3WV_5.

At this time, in order to return the high temperature water to the heat storage tank, when the 5-3 way valve (3WV_5) is turned on, hot water is stored.

When the fifth-three-way valve (3WV_5) is turned off to supply to the use of hot water,

In this case, if the amount of hot water is used or the temperature of the water-cooled heat exchanger does not rise during the initial operation of the system, the temperature may not reach the target temperature.

When instantaneous use of hot water is required, it is possible to supply hot water discharged by the circulation pump to the place of use by the check valve (CV_11) by operating a feed valve (VA_2: Feed Valve) connected to a heat storage tank. .

1 is a flowchart illustrating a main operation mode of a controller for controlling a hybrid air conditioning system.

When the power is turned on and the operation start button is pressed, the main window shows four selection modes: hot water operation, cooling operation, floor heating operation, and refrigeration operation. When the desired operation mode is selected, the operation mode is activated.

For example, when the hot water supply mode is selected, the compressor (COMP = ON) for controlling the flow of the refrigerant is operated to start the hot water operation, and the high temperature and high pressure liquid refrigerant that has passed through the condenser is discharged through the first three-way valve (3WV_1). = OFF) to control the direction of the refrigerant toward the expansion valve (EV_0 = ON) and the evaporator (Eva_0 = ON) for the hot water supply, and the direction of the refrigerant to the bypass line by the 2-3 way valve (3WV_2 = ON). Control to return to the compressor.

Meanwhile, the hot water in the hot water mode discharges the preheated hot water stored in the heat storage tank by the circulation pump (CP1 = ON), and flows into the condenser.

It rises to high temperature by heat exchange process and controls direction of floor heating and hot water supply by 4-3 way valve (3WV_4 = OFF),

The 5-3 way valve (3WV_5 = ON) to achieve the purpose by controlling the direction of the hot water supply to the place of the valve for the hot water supply.

3 is a flowchart showing a state in which the hot water supply operation mode is executed.

If it is necessary to cool the room by determining whether there is a need for indoor cooling in the hot water supply operation, the expansion valves (EV_1, EV_2, ...) and the evaporator (Eva_1) installed in the room by the first-three-way valve (3WV_1 = ON) , Eva_2, ...) to supply the refrigerant to cool the room.

If it is necessary to use the refrigerating function by judging whether to return the gas refrigerant generated after indoor cooling to the compressor side or to use it as a refrigerating refrigerant, the refrigerating module RM The refrigeration operation is performed by controlling the direction of the gas refrigerant to the refrigerant side, and the refrigerant is discharged to the compressor side.

When not cooling the room, the direction of the refrigerant is controlled by the first-three-way valve (3WV_1 = OFF) to the expansion valve EV_0 and the evaporator Eva_0 for the hot water supply, and the use of the refrigeration operation is determined.

If the refrigeration function is needed, the refrigeration operation is performed by controlling the direction of the gas refrigerant to the refrigeration module (RM) (Refrigerator) side by the second-three-way valve (3WV_2 = OFF) to discharge the refrigerant to the compressor side.

Next, when the gas refrigerant discharged to the compressor (COMP) is insufficient to overheat due to the refrigerating function and the temperature rise according to the length of the pipeline before the compressor is introduced into the compressor.

It is determined whether to use the superheat degree control, and if it is necessary to control the superheat degree, the flow rate control inflowing the hot water supply water discharged from the condenser by the second flow control valve (FCV_2 = ON) into the superheat degree circuit (S_Heat). Superheat is controlled through.

1-1. Switching to floor heating module (FHM) during single operation of hot water supply module (WSM)

To switch to the floor heating module (FHM) during hot water supply mode operation, turn on the 4-3 valve 3WV_4 to change the direction of the hot water supply discharged from the water-cooled condenser to floor heating. ,

Turn off the circulation pump (CP1) connected to the heat storage tank (Heat Storage Tank), turn on the circulation pump (CP2) connected to the floor heating storage tank (FHT: Floor Heating Tank) to circulate the hot water used for floor heating Floor heating is performed through.

The floor heating water is discharged by the operation of the floor heating circulation pump (CP2) and passes through the check valve (CV_10), and then flows into the water-cooled heat exchanger (Condenser) to raise the temperature of the floor heating water to perform floor heating. do.

At this time, when the floor heating water is insufficient, that is, when the water level reaches the lower limit by the water level sensor installed in the floor heating tank (FHT), the water supply valve (VA_3) is turned on to supply water from the water supply source, and the water level by the water level sensor. When the upper limit is reached, the water supply valve is turned off to stop the water circulation.

1-2. Simultaneous operation of the refrigeration module (RM) during the independent operation of the hot water supply module (WSM)

A separate refrigeration module (RM) is installed between the evaporator (Eva_0, Eva_1, Eva_2, ...) and the liquid separator (AC: Accumulator) to recover and reuse the low-temperature gas refrigerant generated during the hot water supply mode. The refrigeration driver using a low temperature gas refrigerant can be introduced.

That is, in the hot water operation mode, the high temperature and high pressure liquid refrigerant stored in the receiver RT is controlled by the first-three-way valve 3WV_1 to control the flow direction of the refrigerant to the evaporator Eva_0 via the expansion valve EV_0. Inflow,

After the latent heat is changed by the evaporation of the refrigerant, the refrigerant is changed into a gas refrigerant of low temperature and low pressure and discharged from the evaporator EV_0.

The low-temperature low-pressure gas refrigerant discharged from the evaporator EV_0 turns off the second-three-way valve 3WV_2 to guide the flow direction of the refrigerant toward the check valve CV_3 when using the refrigerator module RM (Refrigerator). and,

It flows into the refrigeration module (RM) through the check valve (CV_3) to perform the refrigeration operation using the cold energy of the low temperature.

In addition, the low-temperature low-pressure gas refrigerant introduced into the refrigerator module (RM) is discharged from the refrigerating module (RM) in a state where the temperature rises slightly by heat exchange for the refrigerating / freezing function, and passes through the check valve (CV_6). It enters the liquid separator (AC).

When the hot water supply operation and the refrigeration module (RM) operate at the same time and the hot water supply operation stops, the compressor with the larger capacity among the two parallel compressors (COMP) is turned off,

The hot water supply water is returned to the heat storage tank by turning on the 5-3 way valve (3WV_5) for circulating the high temperature water supply water by operating only a small capacity compressor.

At this time, by turning off the second flow control valve FCV_2 for the superheat diagram circuit, the temperature of the gas refrigerant flowing into the compressor is prevented from being overheated.

When the hot water is used, the high-temperature hot water is supplied to the place where the hot water is used by turning off the fifth-three-way valve (3WV_5).

When the use of the hot water is stopped at the place of use, the 5-3 way valve (3WV_5) is turned on to return the hot water to the heat storage tank.

When the hot water supply operation is stopped and only the refrigeration module (RM) is operated, the temperature of the hot hot water flowing into the water-cooled condenser is reduced by using a supercooling circuit (S_Cool) to improve the freezing effect. Let's go.

That is, the supercooling degree circuit S_Cool adjusts the flow rate of the low-temperature low-pressure gas refrigerant passed through the evaporator Eva_0 by the first flow control valve FCFC_1 to control the hot water supply and the gas refrigerant. The supercooling temperature is controlled by heat exchange.

At this time, the first flow control valve (FCV_1) controls the flow rate of the low-temperature gas refrigerant according to the output value by the temperature sensor TS_1 for measuring the target condensation temperature of the water-cooled heat exchanger and the temperature of the hot water supply water. ,

At this time, by controlling the hot water inlet temperature of the water-cooled heat exchanger it is possible to improve the freezing effect by lowering the condensation temperature.

The latent heat-cooled gas refrigerant by the evaporator Eva_0 controls the flow rate of the target gas refrigerant by the first flow control valve FCV_1 to flow into the supercooling circuit S_Cool to control the condensation temperature through heat exchange. After

It is discharged in a state where the temperature rises slightly and returns to the main return circuit of the gas refrigerant through the check valve CV_7 and flows into the liquid separator AC.

2. Cooling operation alone (see FIGS. 4 and 5)

4 is a parallel construction of two compressors, the high temperature and high pressure gas refrigerant discharged from the compressor is introduced into a water-cooled heat exchanger (Condenser) and the high temperature and high pressure through heat exchange with the circulating water discharged from the heat storage tank (Heat Storage Tank) Condensing the gas refrigerant to change the latent heat to a liquid refrigerant of high temperature and high pressure, and then stored in the receiver (RT),

It is a latent heat process that supplies liquid refrigerant to an indoor cooling device installed where cooling is necessary and evaporates it into gas refrigerant by expansion valves (EV_1, EV_2, ...) and evaporators (Eva_1, Eva_2, ...). It represents the flow of refrigerant and the flow of circulating water in the cooling operation to control the target cooling temperature by absorbing heat.

When the cooling operation mode is activated, the two compressors simultaneously operate and the low-temperature low-pressure gas refrigerant flowing through the liquid separator (AC) is sucked through the inlet port.

The sensible heat is changed to a gas refrigerant of high temperature and high pressure by the operation of the compressor and discharged from the compressor,

The flow of gas refrigerant is restricted by the check valve (CV_1, CV2: Check Valve) and flows into the oil separator (OS).

The high temperature and high pressure gas refrigerant discharged from the oil separator flows into the high temperature and high pressure gas into the water-cooled heat exchanger (Condenser) and condenses the refrigerant with latent heat change by the hot water and heat exchanger, so that the high temperature and high pressure liquid refrigerant is a receiver (RT: Receiver). Flows into the tank).

That is, in the case of cooling operation, the 1-3th valve (3WV_1) is turned on to supply the flow direction of the refrigerant to a plurality of indoor units that are constructed indoors.

Evaporator (Eva_1, Eva_2, ..) by primarily changing to low pressure wet air state by expansion valve (EV_1, EV_2, ...: Expansion Valve) so that the liquid refrigerant of high temperature and high pressure supplied from the receiver can easily evaporate. .: Flows into the evaporator,

At this time, the liquid refrigerant of high temperature and high pressure is latent heat changed into gas refrigerant of low temperature and low pressure by air-cooled heat exchange and discharged from the evaporator.

The low-temperature low-pressure gas refrigerant discharged from the evaporators Eva_1, Eva_2, ... is passed through the check valve CV_5 to the refrigeration module RM (Refrigerator) and the bypass circuit by the 2-3 valve 3WV_3. Select to control the flow direction of the refrigerant,

When passing through the refrigeration module (RM) is introduced into the liquid separator (AC: Accumulator) in the state of a slight temperature rise.

Only the gas refrigerant from which the liquid refrigerant is separated from the liquid separator AC is discharged, and the temperature sensor TS_2 and the superheat circuit S_Heat provided between the compressor and the liquid separator are not used in the cooling operation.

The circulating water stored in the heat storage tank is discharged by the circulation pump CP1 and flows into the subcooling circuit S_Cool via the check valve CV_9.

The circulating water of the heat storage tank used for condensing the gas refrigerant of high temperature and high pressure stores the circulating water heated from the water-cooled heat exchanger in the cooling operation, so the temperature is gradually increased, so that the supercooling circuit (S_Cool) is used. It is necessary to control the temperature of the circulating water.

Therefore, the supercooling degree circuit S_Cool controls the flow rate of the low temperature thermal energy generated during the cooling operation by the first flow control valve (FCV_1) to maintain the temperature of the circulating water supplied to the water-cooled heat exchanger. To control.

That is, the first flow control valve (FCV_1) is an input value of the difference between the target temperature and the actual temperature of the circulating water by using the temperature sensor TS_1 of the circulating water so that the temperature of the circulating water is kept constant. By feedback control

By controlling the opening and closing cross-sectional area of the first flow control valve FCV_1 to control the flow rate of the low-temperature low-pressure gas refrigerant produced by the evaporator (Eva_1, Eva_2, ...) to supply to the subcooling circuit (S_Cool) of the circulating water To control the temperature

By controlling the temperature of the circulating water by using the supercooling degree circuit (S_Cool) it is possible to increase the freezing effect by controlling the condensation temperature of the liquid refrigerant low.

Generally, in order to increase the freezing effect, a cooling circuit is installed at the inlet side of the expansion valves (EV_1, EV_2, ...) to lower the temperature of the liquid refrigerant and flow into the expansion valve as a supercooled liquid refrigerant.

The expansion valve makes the high-pressure liquid refrigerant introduced into the wet air to easily evaporate to be introduced into the evaporator.

And the circulating water flowing into the water-cooled heat exchanger (Condenser) is introduced into the state controlled constantly by the subcooling degree circuit (S_Cool) to control the condensation temperature,

Through the high temperature and high pressure gas refrigerant flowing into the heat exchanger side and heat exchange, it is discharged as high temperature circulating water at the outlet side,

The flow direction of the hot water is controlled by the 4-3 way valve (3WV_4) which can select the hot water operation and the floor heating operation.

When the hot water supply operation and the floor heating operation are not performed, the fourth-three-way valve 3WV_4 is turned off, and the hot water flows into the fifth-three-way valve 3WV_5 to select the hot water operation and the preheating operation.

When the fifth-three-way valve (3WV_5) is turned on, the hot water operation is performed, and when it is turned off, the hot water operation is performed, and hot water is introduced into a heat storage tank to store hot water.

When the use of hot water is required in the cooling operation, the water supply valve VA_2 is turned on and the circulating water discharged by the circulation pump CP1 connected to the heat storage tank is connected to the check valve via the water supply valve VA_2. CV_11) to use hot water.

When the use of hot water is required during the cooling operation, if the target operating temperature of the hot water does not reach the target temperature compared with the temperature measured by the temperature sensor TS_1 of the circulating water, the water supply valve VA_2 is turned off, and 5- The 3-way valve (3WV_5) is turned on to use the hot water heated in the water-cooled heat exchanger (Condenser).

5 shows a flowchart in which the cooling operation mode is executed;

If there is a need for using hot water during indoor cooling, hot circulating water recovered from the heat exchange process of the condenser during cooling operation is discharged to the place where hot water is needed by the 5-3 valve (3WV_5 = ON). Produces the same effect as.

In addition, if the need for floor heating occurs while the hot water is being used during indoor cooling operation, the floor heating is installed in the flow direction of the circulating water discharged from the condenser by the 4-3 valve (3WV_4 = ON). Switch to and perform floor heating operation.

If the hot water is not needed during the indoor cooling operation, the flow direction of the circulating water is returned to the heat storage tank side and stored by the fifth-three-way valve (3WV_5 = OFF), and the refrigerant discharged by the cooling operation is returned to the compressor side.

It is determined whether the low-temperature low-pressure gas refrigerant returning to the compressor is required for the use of the refrigerating function. Refrigeration operation is performed by controlling the flow direction and returned to the compressor.

Since the circulating water of the cooling water heat storage tank of the condenser condenses the gas refrigerant of the high temperature and high pressure discharged from the compressor by using the refrigerant returned to the compressor side, temperature control by the supercooling degree circuit to maintain a constant condensation temperature at the inlet side of the condenser. There is a need.

Therefore, if the need for subcooling control occurs by controlling the temperature of the circulating water flowing into the condenser, the low temperature refrigerant returned to the compressor by the first flow control valve (FCV_1 = ON) is circulated to the subcooling circuit side so that Subcooling control is performed by controlling the temperature.

2-1. Additional operation of refrigeration module (RM) during cooling single operation

Low temperature discharged from the evaporator (Eva_1, Eva_2, ...) when a change in temperature occurs in the refrigeration module (RM) (Refrigerator) that is built in parallel with the cooling system during the cooling operation The direction of the low-pressure gas refrigerant is controlled by the third-three-way valve 3WV_3.

In order to supply gas refrigerant to the refrigerating module RM, the check valve CV_3 installed in the pipeline of the gas refrigerant discharged from the water heater evaporator Eva_0 by turning off the third-three-way valve 3WV_3. Join the front end to flow into the refrigeration module (RM).

When the gas refrigerant used for controlling the target temperature of the refrigerating module RM is discharged from the refrigerating module RM, the gas refrigerant is discharged to the gas refrigerant slightly higher than the inlet side and returned to the bypass pipe via the check valve CV_6. In accordance with the opening and closing cross-sectional area of the first flow control valve FCV_1, the refrigerant is separated into the gas refrigerant supplied to the liquid separator AC and the subcooling degree circuit S_Cool.

3. Single operation of floor heating module (FHM) (see Fig. 6 and 7)

FIG. 6 illustrates the construction of two compressors in parallel, and the high temperature and high pressure gas refrigerant discharged from the compressor is introduced into a water-cooled condenser to exchange heat with floor heating water discharged from a floor heating tank (FHT). Condensed gaseous refrigerant of high temperature and high pressure, latent heat change to liquid refrigerant of high temperature and high pressure, and stored in the receiver (RT),

Floor heating independent operation circuit controlling the temperature of floor heating by absorbing ambient heat and returning low-temperature low-pressure gas refrigerant to the compressor by latent heat process that evaporates into gas refrigerant by expansion valve (EV_0) and evaporator (Eva_0) for hot water supply Flow of refrigerant and floor heating water.

When the floor heating operation mode is activated, two compressors are operated at the same time, and the low-temperature low-pressure gas refrigerant flowing through the liquid separator (AC) is sucked through the intake port,

Due to the operation of the compressor, the sensible heat is changed by gas refrigerant of high temperature and high pressure and discharged from the compressor.

The gas refrigerant at high temperature and high pressure is restricted by the check valve (CV_1, CV2: Check Valve) and flows through the oil separator (OS: Oil Separator) and flows into the water-cooled condenser. The refrigerant is condensed by latent heat change through heat exchange and flows into the receiver (RT) receiver as a liquid refrigerant with high temperature and high pressure.

In the case of floor heating operation, the liquid refrigerant of high temperature and high pressure is turned off by the first-three-way valve (3WV_1), and the flow direction of the refrigerant is latent heat by the low temperature and low pressure gas refrigerant by the expansion valve (EV_0) and the evaporator (Eva_0). Is changed and discharged from the evaporator.

The low-temperature low-pressure gas refrigerant discharged from the evaporator Eva_0 passes through the check valve CV_4 installed in the bypass circuit by turning on the second-three-way valve 3WV_2 and the third-three-way valve 3WV_3. ), And flows into the liquid separator (AC) by the ON action of the 3rd-3 way valve (3WV_3).

Separating the liquid refrigerant from the liquid separator (AC) and discharging only the gas refrigerant toward the compressor (COMP),

By using a temperature sensor (TS_2) and the second flow control valve (FCV_2) between the compressor and the liquid separator by raising the gas refrigerant of low temperature and low pressure by a constant temperature by the superheater circuit (S_Heat) to flow into the compressor

Since the temperature of the gas to be input is higher than when the superheating circuit is not used, the temperature of the gas discharged from the compressor is increased to increase heat exchange efficiency, thereby improving heating efficiency during floor heating operation.

At this time, the second flow control valve FCV_2 controls the superheat degree of the gas refrigerant flowing into the compressor by controlling the flow rate of the high temperature floor heating water discharged from the water-cooled heat exchanger.

It controls the opening or closing area or opening and closing time of the second flow control valve FCV_2 by calculating the temperature difference calculated by the overheat target temperature and the temperature sensor TS_2 to determine the high temperature of the floor heating water discharged from the water-cooled condenser. The flow rate is passed through the superheat circuit S_Heat to increase the temperature of the gas refrigerant.

The floor heating water stored in the floor heating tank (FHT) is discharged by the circulation pump (CP2) and passed through a check valve (CV_10) and a subcooling circuit (S_Cool) to a water-cooled heat exchanger (Condenser). Inflow,

The floor heating water flowing into the water-cooled heat exchanger (Condenser) is discharged as high temperature floor heating water at the outlet side through the heat exchange with the high temperature and high pressure gas refrigerant flowing into the heat exchanger.

The high temperature floor heating water is separated into flow rate and non-use in superheated circuit (S_Heat)

Used in the superheating circuit (S_Heat) flows into the 4-3 way valve (3WV_4) that can be mixed with the floor heating water, the temperature slightly lowered to select the hot water supply operation and floor heating operation flows into the hot water flow direction This is controlled.

In the case of floor heating operation, the purpose is achieved by circulating high-temperature floor heating water to the room built in the floor heating module (FHM) by turning on the fourth-three-way valve (3WV_4).

Completed floor heating water is taken into the floor heating tank (FHT: Floor Heating Tank) in a state where the temperature is lowered due to heat being lost through heat exchange in the floor heating,

If the quantity of floor heating tank (FHT) is insufficient, turn on the water supply valve (VA_3) to supply a certain amount of water.

7 shows a flow chart during floor heating operation,

If the necessity of indoor cooling occurs during the floor heating operation, the flow direction of the refrigerant is switched to the indoor side by turning on the 1-3 valve 3WV_1,

Room cooling is performed by evaporators (Eva_1, Eva_2, ...) installed indoors.

And the gas refrigerant generated during the cooling operation is returned to the compressor side,

If it is necessary to determine whether the refrigeration function is used during the refrigeration operation, and the refrigeration function needs to be used, the refrigeration operation is performed by switching to the refrigeration module RM in the flow direction of the refrigerant by the 3rd-3 way valve (3WV_3 = OFF).

Refrigerant through the bypass pipe is returned to the compressor by the refrigerant having completed the refrigeration operation and the third-three-way valve (3WV_3 = ON), and it is determined whether the superheating circuit is used to increase the floor heating efficiency.

If indoor cooling is not used during floor heating operation, low-temperature low-pressure gas refrigerant through the hot water supply evaporator (Eva_0) is returned to the compressor.

If it is determined that the refrigeration function is in use on the way, it is necessary to use the refrigeration function by switching the flow direction of the refrigerant to the refrigeration module (RM) side by means of the 2-3 valve (3WV_2 = OFF).

If the refrigeration function is not used, it is introduced into the compressor through the bypass pipe to determine whether the superheat circuit is used.

When superheat control is performed to increase the floor heating efficiency, the high temperature circulating water discharged from the condenser by the second flow control valve (FCV_2 = ON) is passed through the superheat circuit to raise the temperature of the refrigerant. Inhale with the compressor.

3-1. Additional operation of refrigeration module (RM) during sole operation of floor heating module (FHM)

When there is a need to supply low-temperature gas refrigerant to the refrigerator module RM due to lack of cooling in the refrigerator module RM while the floor heating independent operation circuit is operating.

The low-temperature low-pressure gas refrigerant discharged from the evaporator Eva_0 is controlled by the second-three-way valve 3WV_2 to control the direction of the gas refrigerant.

In order to supply the gas refrigerant to the refrigeration module (RM), the second and third valves (3WV_2) are turned off so that the low temperature and low pressure gas refrigerant flows into the refrigerating device through the check valve CV_3.

When the gas refrigerant used for controlling the target temperature of the refrigerating module RM is discharged from the refrigerating module RM, the gas refrigerant is discharged to the gas refrigerant slightly higher than the inlet side and returned to the bypass pipe via the check valve CV_6. It flows into the compressor through the separator (AC) and the superheating circuit (S_Heat).

4. Single operation of refrigeration module (RM) (see Figs. 8 and 9)

8 is a high-pressure high-pressure gas refrigerant through heat exchange with the circulating water discharged from the heat storage tank by introducing two compressors in parallel and the high-temperature, high-pressure gas refrigerant discharged from the compressor into a water-cooled heat exchanger (Condenser) Condensate the latent heat into a liquid refrigerant of high temperature and high pressure and store it in the receiver (RT),

The latent heat process evaporates into gas refrigerant by the expansion valve EV_0 and the evaporator Eva_0 for the hot water supply, and shows the flow of the refrigerant and the flow of the circulating water to return the low temperature and low pressure gas refrigerant to the compressor.

When the refrigeration operation mode is activated, a compressor with a suitable capacity is selectively operated among the two compressors (COMP) to inhale the low-temperature low-pressure gas refrigerant introduced through the liquid separator (AC) through the inlet port, thereby operating the compressor at high temperature and high pressure. Sensible heat change by gas refrigerant is discharged from the compressor,

High-temperature, high-pressure gas refrigerant is restricted to the flow direction of gas refrigerant by a check valve (CV_1 or CV2: Check Valve) and flows into a water-cooled condenser through an oil separator (OS) to exchange heat with circulating water. The refrigerant is condensed by latent heat change and flows into the receiver (RT) receiver as a liquid refrigerant with high temperature and high pressure.

In the case of refrigeration operation, the liquid refrigerant of high temperature and high pressure is turned off by the third-way valve (3WV_1), and the flow direction of the refrigerant is changed by the low temperature and low pressure gas refrigerant by the expansion valve (EV_0) and the evaporator (Eva_0). Discharged from the evaporator.

The low-temperature low-pressure gas refrigerant discharged from the evaporator Eva_0 flows into the refrigerating module RM through the check valve CV_3 by the OFF operation of the second-three-way valve 3WV_2 to exert a refrigerating function and return circuit. It flows into the Accumulator (AC) installed in.

The supercooling degree circuit S_Cool controls the flow rate of the low temperature thermal energy generated in the refrigeration operation by the first flow control valve (FCV_1) to maintain a constant temperature of the circulating water supplied to the water-cooled heat exchanger. To control.

That is, the first flow control valve (FCV_1) is an input value of the difference between the target temperature and the actual temperature of the circulating water by using the temperature sensor TS_1 of the circulating water so that the temperature of the circulating water is kept constant. By feedback control

By controlling the opening and closing cross-sectional area of the first flow control valve FCV_1 to control the low-temperature low-temperature gas refrigerant flow generated by the evaporator (Eva_0) to supply to the supercooling degree circuit (S_Cool) to control the temperature of the circulating water.

The gas refrigerant returned to the compressor is introduced into the compressor at a temperature higher than that of the low temperature gas refrigerant discharged from the evaporator Eva_0 through heat exchange in the subcooling circuit S_Cool.

The circulating water stored in the heat storage tank is discharged by the circulation pump CP1 and flows into the water-cooled heat exchanger through the check valve CV_9 and the subcooling circuit S_Cool.

The circulating water introduced into the water-cooled heat exchanger (Condenser) is discharged into the high-temperature circulating water at the outlet side and returned to the heat storage tank through the high temperature and high pressure gas refrigerant flowing into the heat exchanger side.

9 shows a flow chart in the refrigerating operation mode,

If hot water is needed during refrigeration operation using only the refrigerating function, use the 5-3 way valve (3WV_5 = ON) installed in the return line of the circulating water to supply the circulating water to the place where hot water is needed. The purpose of driving is achieved.

Also, if floor heating is required as needed, use the 4-3 way valve (3WV_4 = ON) installed in the return line to switch the circulating water discharged from the condenser to the place where floor heating is installed. The purpose of driving is achieved.

When the hot water operation is not necessary during the refrigerating operation, the circulating water required for cooling the condenser is returned to the heat storage tank by the 5-3 release valve (3WV_5 = OFF) and stored.

The refrigerant is switched to the gas refrigerant through the hot water evaporator and introduced into the refrigeration module (RM).

When the necessity of indoor cooling occurs, the refrigerant flow is switched to the indoor side by the first-three-way valve (3WV_1 = OFF) to achieve the purpose by using an evaporator installed indoors.

It is introduced into the refrigeration module (RM) by the third-three-way valve (3WV_3 = OFF) returned to the compressor to maintain the refrigeration function.

When the need for the subcooling control to increase the yaw rate of the refrigerating module RM occurs, the first flow control valve FCV_1 = in the return line of the refrigerant returned to the compressor to control the temperature of the circulating water flowing into the condenser. ON) passes the low-temperature gas refrigerant to the supercooling circuit to control the temperature of the circulating water.

4-1. Additional operation of indoor cooling function during single operation of refrigeration module (RM)

If the necessity of indoor cooling occurs when the refrigeration unit operation circuit is operated by the refrigeration module (RM)

By turning on the 1-3 way valve (3WV_1), the liquid refrigerant of high temperature and high pressure is supplied to the expansion valves (EV_1, EV_2, ..) and evaporators (Eva_1, Eva_2, ...) installed inside the liquid refrigerant. The evaporation process absorbs the surrounding heat and performs the indoor cooling function.

In addition, since the low-temperature gas refrigerant is cooled in the room, the check valve CV_5 flows into the third-three-way valve 3WV_3, so the third-three-way valve 3WV_3 is turned off, and the gas refrigerant flows into the refrigeration module RM. Make sure,

The gas refrigerant used to control the target temperature of the refrigerating module RM functions in the refrigerating module RM, is discharged and returned to the bypass line through the check valve CV_6 to return the liquid separator AC and the superheating circuit. It enters the compressor via (S_Heat).

In the above description with reference to the accompanying drawings of the present invention hybrid-type heating and cooling system, the specific shape and direction was described mainly, the present invention can be variously modified and changed by those skilled in the art, such modifications and changes are the rights of the present invention It should be construed as being included in the scope.

Condenser: Water-cooled condenser (heat exchanger)
COMP: Compressor Eva: Evaporator
EV: Expansion Valve
RM: Refrigeration module Heat storage tank: Heat storage tank
FHM: Floor heating module WSM: Hot water supply module
3WV: 3-way valve CV: Check valve
CA: Water Supply Valve CP: Circulation Pump
S_Cool: Supercooling circuit S_Heat: Supercooling circuit
FCV: Flow Control Valve TS: Sensor
AC: Liquid Separator OS: Oil Separator
RT: Receiver

Claims (4)

In a cooling and heating system that enables heating and cooling through heat exchange of refrigerant circulating through an expansion valve, an evaporator, a compressor, and a water-cooled condenser,
A refrigeration module connected to the outlet side of the evaporator;
A heat storage tank for supplying low temperature water to the condenser and storing the heated high temperature water through heat exchange with the condenser when the cooling operation or the refrigerating operation or both of them are operated;
A floor heating module for supplying circulating water to the condenser and circulating floor heating water through heat exchange with the condenser;
A hot water supply module for receiving hot water stored in connection with the heat storage tank or hot water circulated through heat exchange between the heat storage tank and the condenser; And
It includes a control means having a plurality of three-way valve for selectively operating the hot water supply operation, floor heating operation, refrigeration operation and cooling operation,

The control means is connected to the condenser and the expansion valve, the first and third discharge valve for controlling the hot water supply operation or cooling operation, the second evaporator and the refrigeration module, the second for controlling the refrigeration operation during hot water operation A three-way valve, connected to the evaporator and a refrigeration module, a third-three-way valve for controlling a refrigeration operation during a cooling operation, and connected to the condenser and a floor heating module, and a hot water operation during a hot water operation or a cooling operation And a third three-way valve for controlling the floor heating operation, and a fifth three-way valve connected to the condenser, the hot water supply module, and the heat storage tank, and controlling the hot water operation.

It is provided on the inlet side of the condenser,
In cooling or refrigeration, or both
A subcooling circuit is further provided for supplying the gas refrigerant discharged by the evaporator by a first flow control valve to lower the temperature of the hot water supplied from the heat storage tank to the condenser.

It is provided at the inlet side of the compressor,
In hot water operation or floor heating operation, or both
It is further provided with a superheating circuit for supplying the hot water discharged from the condenser by a second flow control valve to increase the temperature of the gas refrigerant flowing into the compressor,

A temperature sensor for detecting a temperature of the gas refrigerant returning to the compressor is connected,
A target temperature of the superheat degree is set for superheat degree control, and an error value is generated by comparing the target temperature with an output value of the temperature sensor, and the second flow control valve is required for superheat degree control according to the error value. And a flow rate is supplied from the condenser to the superheating circuit to increase the temperature of the gas refrigerant through heat exchange between the hot water supply water and the gas refrigerant.
delete delete The method of claim 1,
It is further provided with a receiver for storing the liquid refrigerant discharged to the condenser,
Between the evaporator and the compressor is further provided a liquid separator for separating the liquid refrigerant contained in the gas refrigerant discharged from the evaporator,
On the discharge side of the compressor is further provided with an oil separator for separating the refrigerant and the evaporation component of the lubricant generated during the compression of the gas refrigerant,
The heat storage tank
A circulation pump and a water supply valve connected to the circulation pump,
The water supply valve is connected to the hot water supply module to supply hot water stored in the heat storage tank directly to the hot water supply module.
The floor heating module
A pipe for circulation of heating water, a floor heating storage tank connected to the pipe for storing heating water, a circulation pump connected to the storage tank for supplying heating water to the heat storage tank circulation, and connected to the storage tank Hybrid type heating and cooling system comprising a water supply valve for replenishing the heating water.

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