KR20200141577A - Hybrid heating system and control method fused with heat pump system and solar light by solar and air heat - Google Patents

Abstract

The present invention can improve the performance of a heat pump by a technique using solar heat which introduces a solar heat system without boiling to overflow or freezing and bursting to boil water stored in a heat storage tank to directly use heated hot water for heating and hot water and use the hot water of the heat storage tank cooled to a heating temperature for solar heat or lower as an evaporation source of the heat pump since the performance of the heat pump is degraded when the outside air temperature is below zero if solar heating is insufficient in winter to resort to heat pump heating, and a control technique which includes a hot water heat evaporator of a heat storage tank and an air heat evaporator in a heat pump system and adjusts an outside temperature setting value in an indoor temperature regulator from the air heat evaporator to the hot water heat evaporator in accordance with the outside air temperature. The present invention also provides a selective control method of a heat pump heating mode and a heating mode for solar heat by detecting the heat storage temperature of the heat storage tank, and a hot water heat supply method and a control technique which can maintain the evaporation temperature of the hot water heat evaporator at a constant level. The present invention also relates to a hybrid heat pump heating/cooling system using solar heat, air heat, and sunlight and a control method thereof which can realize an energy-zero house system as a technique using hybrid new and renewable energy for covering all or a portion of consumption power used in the hybrid heat pump heating system with photovoltaic power generation.

Description

Hybrid heating system and control method fused with heat pump system and solar light by solar and air heat}

The present invention relates to a solar-only heating or a selective heat pump system using solar heat and air heat, and a hybrid heating system and a control method in which solar light is fused.

More specifically, when the hot water stored by the solar system is used directly as heating and hot water, and the heating load increases, the hot water temperature of the heat storage tank is lower than the required heating temperature set point and additional heating is performed with the heat pump system. It is equipped with a hot water heat evaporator to be used as the evaporation heat source of the heat pump, and the outside air temperature to improve the performance of the heat pump by fusing all or part of the power consumption of the hybrid heating system to the solar system supplied by sunlight. The present invention relates to a proportional control device that is controlled to be selectively used among an air heat evaporator and a solar heat storage tank hot water evaporator by detecting the temperature and heat storage tank temperature, and a hybrid heating system.

Among renewable energy, solar power is used to produce electricity, and solar heat is used for heating and hot water. To solve the lack of heating, auxiliary boilers are operated or used in conjunction with heat pump systems. .

In recent years, solar power generation technology has been developed with a conversion efficiency of over 20% of solar cells, and 400W-class solar modules are being distributed. Among the solar power utilization technologies, the heat collection technology is a double vacuum tube type heat collecting device for heat pipes, which increases the heat collection efficiency. Although the solar heat is used by improving it to the% level, solar heating is only partially realized due to the decrease in the amount of sunlight and insolation during the winter season with severe load fluctuations.

To compensate for this, a heat pump system has been developed and distributed, and recently, products with a COP reaching 3.4 due to the development of an inverter heat pump have been developed and distributed, but in winter when the outside temperature drops below zero, the performance of the heat pump rapidly decreases. There is a falling phenomenon.

In addition, a hybrid heat pump system in which solar heat and geothermal heat, air heat and solar power are fused has been developed and distributed, but the technology used is reduced due to the difference in the operating method and control technology of the system, and the performance of the inverter heat pump is installed on site. When used, the efficiency is deteriorating, and there is a problem that the power consumption of the heat pump cannot be covered by only residential electricity.

For the above reasons, despite the improvement of the technology of the hybrid heat pump system, a problem occurs in field application, and development of a hybrid heating technology capable of solving this problem is required.

10-2017-0094847 10-2014-0131793 10-1361682 10-2018-0126941 10-2018-0053853

The present invention has been developed to solve the above problems, and the operation and control method and use of a hybrid heating system can be maintained while the performance of the hybrid heating system is not degraded even under a condition where the outside temperature in winter falls below zero. It aims to provide technology.

In addition, since the power consumption of the hybrid heating system can be covered by linking the solar power facility, the technology of using the hybrid heating system has been improved so that it can be fully utilized even in the current residential electricity billing system and supply system without a separate electricity supply source. There is a purpose to provide.

Among the above purposes, an air heat evaporator and an evaporator for solar hot water are provided so that the performance of the heat pump system can be maintained even when the outside temperature in winter falls below zero, and when the outside temperature drops below zero, the circulation cycle of the heat pump is stored in the air heat evaporator. In order to maintain the performance of the heat pump by changing and circulating it to an evaporator for hot water that uses the hot water heat, the indoor temperature controller compares the outside temperature with the temperature of the heat storage tank, and the optional control system that can be freely changed to a hot water heat evaporator according to the situation. ,

An automatic expansion valve is selected for the air heat evaporator, and an inverter heat pump system that efficiently controls the expansion pressure and condensation temperature according to changes in the outside temperature is selected, and the evaporation temperature is improved and kept constant for the hot water heat evaporator. By installing an automatic temperature control device (TC) that adjusts the amount of circulating water supplied to the receiving evaporator, it is possible to efficiently use the hot water heat from the limited heat storage tank.

In order to cover the required power with solar power, the use technology of a hybrid heating system that can realize heating even if the compressor, which accounts for more than 90% of the power consumption of the hybrid heating system, is limited to a 2.6KW class inverter type compressor. It features.

According to the present invention, the efficiency is improved with a heat pump system that selectively uses hot water heat and air heat, and solar heat collection technology that does not boil over or freeze in solar heat, By introducing a solar heat system with improved solar heat utilization technology as a top-down combined heat storage tank, use it as direct heating and hot water with solar heat, or develop control technology and use technology to supply evaporative heat to a heat pump, and combine solar power to hybrid heating. It is possible to realize a zero-energy house system that solves the power consumption of the system by itself.

1 is a representative diagram showing the overall configuration of a hybrid heating system.
2 is a reference diagram showing a method of grafting and controlling hot water and cooling/heating when an existing boiler is installed.
3 is a detailed view showing the components of the heat pump system and the circulation cycle through the air heat evaporator
4 is a circulation cycle diagram through a hot water heat evaporator of the heat pump system
5 is a flow chart of the defrost cycle
6 is an indoor air heating cycle diagram
7 is an indoor air cooling cycle diagram
8 is a flowchart of an ondol cooling and fan coil cooling cycle
9 is a Moliere diagram showing the amount of heat required by the compressor according to the outside temperature in the heat pump system.
10 and 11 are flow charts showing a driving control method of a hybrid heating system.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in describing the present invention, descriptions of already known functions and configurations will be omitted in order to clarify the gist of the present invention.

In addition, the use temperature of the heat pump is arbitrarily set to 55°C, the refrigerant used is described based on R-410A, and the value of each set value is arbitrarily set and can be changed within the realization range of the present invention.

1 is a representative diagram, including a solar thermal system 100, a heat storage tank 130 and a heating use unit 500, and a drive control unit 1300 including a heat pump system 700 and a solar system 1000 ), a hybrid heating system is constructed.

The solar system 100 senses the upper temperature T2 of the heat storage tank 130, and when the temperature exceeds the set temperature, the heat medium circulation pump P1 is stopped, and the four-way valve 20 for controlling the heat medium circulation direction is the service tank 22. The electric valve 19 for heat medium control which is controlled in the direction and installed on the upper part of the heat medium piping line is opened, the heat medium is recovered to the service tank, and the heat medium circulation line 10 becomes empty, so that the superheated air collected by the heat collecting unit is opened. It is discharged to the atmosphere through the motorized valve 19 to perform an overheating prevention function.

Hereinafter, a detailed description of the solar thermal system is described in detail in the previously pending application number 10-2019-0009984 (a complex solar thermal system using a sealed heat storage tank structure and a temperature difference control device for preventing overheating and freezing), so it is omitted in the present invention. , An open heat medium circulation pump (P5) for initial circulation of the system is installed and operated to facilitate circulation of the heat medium while the heat medium piping line is empty, and when the heat medium piping line is compressed to more than atmospheric pressure after a set time The circulation direction of the heating medium is switched to a sealed state that does not pass through the service tank, and the solar system can be operated more stably by adding the function of selectively controlling the closed and open types in which P5 stops and P2 starts.

3 shows the circulation cycle through the air heat evaporator in the heat pump system, and in order to stably maintain the performance of the heat pump, the air heat evaporator 74 and the hot water heat evaporator 77 are divided and integrated 710 into a case. It is possible to improve field workability by separately disposing an air heat evaporator that is assembled and separately installed outside, a heat storage tank connection, and a heating load side connection.

The system consists of an inverter compressor (70) and a condensation heat exchanger (72) capable of heating hot water and heating at the same time, and an expansion valve and an air heat evaporator (dry type) and hot water heat that can select the evaporation heat source according to the outside temperature. The evaporator (wet type) is separated and arranged in the order of compression-condensation-expansion-evaporation.

Compressor overheating prevention control pipe branched from the discharge side of the condenser 72 to prevent overheating of the compressor by installing an oil separator 83 at the outlet side of the compressor to separate and collect the oil flowing from the compressor. (82) is installed, and a discharge temperature sensor (T7) is installed in the flow path discharged from the compressor to proportionally detect the overheating prevention temperature set point (ΔT17), and T7 is 35.1kg/cm2, which is the commercial operating pressure described in the present invention. If it is higher than ΔT17 at (55°C), the overheating prevention control valve 88 is controlled and connected to the compressor inlet through the third expansion valve 94 to prevent overheating.

In addition, it is desirable to improve the expansion efficiency by installing a receiver tank 85 and a filter dryer 81 in the flow path on the outlet side of the condenser 72 so that only the liquid refrigerant is circulated to the expansion valve, and an accumulator is provided on the compressor inlet side. 80) and the fourth expansion valve 90 are installed to evaporate the separated liquid refrigerant so that only gaseous refrigerant is supplied to the compressor, thereby improving the performance of the compressor.

In addition, by installing a heat pump heating flow rate control temperature sensor (T8) and a heat pump heating flow rate control valve 76 in the heating return line 53 connected to the condenser, the heat pump heating water outlet temperature control device 93 is configured, and T8 The flow rate can be adjusted so that a temperature higher than the heat pump heating water outlet minimum temperature set point (ΔT18) can be discharged.

The hybrid heating system is basically used for solar heating and hot water (hereinafter referred to only as heating), but when solar heating is insufficient in winter, a heat pump is operated as a system to supplement solar heating.

Therefore, in the heat pump, a cycle is formed through the air heat evaporator, but the performance of the heat pump deteriorates when the outside temperature drops below zero, so by reviewing the outside temperature and the temperature of the heat storage tank, an indoor temperature controller installed in the drive control unit 1300 ( If the outside temperature set point (ΔT14) is adjusted in 131), the adjusted outdoor temperature changes from the air heat evaporator to a cycle through the hot water heat evaporator, and the evaporation heat is supplied to the hot water heat stored in the heat storage tank.

Therefore, it is necessary to control the amount of refrigerant by comparing and detecting the refrigerant gas temperature 49 at the evaporator inlet and the refrigerant gas temperature 47 at the evaporator outlet by installing a temperature type automatic expansion valve in the air heat evaporator, and operating the outside temperature supplied to the air heat evaporator. By setting the range from 15℃ to -12℃, the outside air temperature (T6) is set at 0℃ at normal output and 45% of the maximum output RPM, and when the outside air temperature is 15℃, the minimum RPM is set to operate intermittently. Inverter heat pump system that efficiently controls the output of the compressor based on the pressure and temperature (47. K2) of the refrigerant discharged from the evaporator by setting the outside temperature to the highest RPM at -12°C can improve performance. There is.

4 shows the heat pump cycle through the hot water heat evaporator, and the method of switching from the air heat evaporator to the hot water heat evaporator is not a constant fixed value, but the indoor temperature controller 131 compares the outside temperature with the heat storage tank temperature. If the outside temperature setting value (ΔT14) for selecting an evaporator is adjusted, from the point when the outside temperature goes down to the adjusted temperature, it is changed to a hot water heat evaporator, and the efficiency of the heat pump can be improved.

Supplementary explanation, in the room temperature controller 131 of FIG. 11, when the heat storage tank temperature is 41°C and the outside temperature is -4°C, the heat pump circulates to the air heat evaporator, but the outside temperature goes down to -20°C at night. Assuming that, if the outdoor temperature set point (ΔT14) of the indoor temperature controller is adjusted to -9℃, the outside temperature decreases further and the heat pump through the hot water heat evaporator is operated from the point when the temperature becomes -9℃, regardless of the outside temperature. Evaporation is constant at the evaporation temperature set point (ΔT25) of the hot water heat evaporator, thereby improving the efficiency of the heat pump.

As such, the reason for adjusting the evaporator selection mode according to the outside temperature is to efficiently perform heating by supplying the evaporation heat amount of the heat pump most effectively with the heat of the limited heat storage tank.

In particular, in the description of the present invention, the circulation pump (P6) installed in the circulation line of the heat storage tank and the hot water heat evaporator is a temperature sensor of the evaporator so that the evaporation temperature of the hot water heat evaporator is set to 0°C and the temperature of the evaporator improves 0°C. The TC circuit is configured so that 46 can be maintained and supplied constant within the hot water heat evaporator temperature control range (ΔT24), and a control system is configured to maintain the evaporation temperature constant by adjusting the flow rate of the circulation pump. The temperature of the heat storage tank is transferred to the evaporator as it is, preventing the heat storage tank temperature from being consumed as evaporation heat at an early stage, effectively managing the heat of the limited heat storage tank and improving the performance of the heat pump.

In addition, if the indoor temperature controller 131 sets the adjustment function to adjust the evaporation temperature of the hot water heat evaporator from 0℃ to 12℃ according to the season, the flow rate of the hot water heat circulation pump P6 is adjusted in the TC circuit. It is controlled to evaporate at a constant temperature, so that the performance of the heat pump can be further improved.

The solar system 1000 generates electricity from the array 92 composed of solar modules, converts it to AC in the inverter 93, connects it to a relay for grid connection, and supplies power to the hybrid electric panel.

2, when the auxiliary boiler is installed in the heating use unit 500, the hot water pipe 51 is connected to the three-way valve V1, and the heating load circulation line 54 is connected to the three-way valve V4 to heat the boiler. In this case, the circulation direction of the hot water and the heating line is switched by a three-way valve, so that the boiler can be heated.

At this time, since the indoor temperature controller must be installed separately for the boiler 57 and the hybrid 58, if the existing indoor temperature controller operation line is two lines, it can be installed separately, but the indoor temperature controller operation line is one line. If there is only one, the hybrid control line should be installed separately, but if installation is difficult due to field conditions, connect the boiler control line in parallel to the hybrid room temperature controller, and if you want to use a boiler, the hybrid room temperature When the controller 131 is set to the auxiliary boiler-only mode, the operation circuit is changed to the boiler operation circuit through the signal converter 59 for selecting the indoor temperature controller, so that the boiler can be operated.

In addition, ondol and fan coil 61 are cooled. The flow of the heating and indoor air cooling/heating unit 92 is shown.

5 is a defrost cycle in an air heat evaporator, which can remove ice and frost, etc., generated by cold air deprived of evaporation heat when the outside temperature goes below zero.The solenoid valve 99 for preventing backflow is OPEN, and the first four-way valve The circulation direction of the air heat evaporator 74 is converted to a condenser by converting the circulation direction to AC and the second four-way valve 96 to CB to perform a defrost function, and the third four-way valve 97 to AD This is converted and circulated to the hot water heat evaporator 77 through the receiver tank 85 to form a defrost cycle.The operation method is that when the air heat evaporator internal surface temperature sense 48 reaches the defrost cycle start surface temperature set point (ΔT20), defrost When the cycle is started and the end surface temperature set point (ΔT21) is reached, the defrost cycle is terminated and returned to the heat pump heating system.

6 is an indoor air heating cycle driven by the cooling/heating controller 132 of the control unit 1300, operated by turning on the indoor air heating mode, the solenoid valve 99 is OPEN, and the first four-way valve 95 is The circulation direction is switched to AC, the second four-way valve 96 is switched to CD.AB, and the refrigerant is circulated to the indoor air cooling/heating unit 92 to perform heating, and the third four-way valve 97 is CD It is converted to AB, passes through the receiver tank 85, and forms a circulation cycle by selecting the air heat and hot water heat set in the evaporator selection mode in the three-way valve V5 in the circulation direction.

7 is an indoor air cooling cycle, the solenoid valve 99 is OPEN, the first four-way valve 95 is AC, the second four-way valve 96 is converted to CB, and the air heat evaporator 74 is converted into a condenser. And the third four-way valve 97 is converted to AD and the circulation direction is changed to AD, passes through the receiver tank 85 and evaporates in the indoor air cooling/heating unit 92 to perform a cooling function, and circulates to the compressor to cool the indoor air. Make a cycle.

8 is an ondol and fan coil cooling cycle, the solenoid valve 99 is OPEN, and the first four-way valve 95 is A-C. The circulation direction of the air heat evaporator 74 is changed to a condenser, and the circulation direction of the air heat evaporator 74 is changed to the DB and the second four-way valve 96 is switched to the AD, and passes through the receiver tank 85. The three-way valve V5 is converted to AC, and the three-way valve V12 is converted to AB, passing the expansion valve 98, and the condenser 72 is converted to an evaporator to perform a cooling function, and the three-way valve V9 is converted to AC, and V13 is converted to CB. Is converted to form a circular cycle,

The three-way valve V2 of the heating circulation lines 52 and 53 is converted to AC, V8 is converted to AB, and V3 is converted to AC, and the circulation pump (P4) and fan coil unit 61 are turned on, and heated by the heat-exchanged cold water. It performs cooling and fan coil cooling functions.

9 is a diagram of the R-410A refrigerant. The heat quantity of the compressor according to the evaporation temperature is ⓕ at the evaporation temperature of 15℃, but the heat quantity of the compressor at the evaporation temperature is -20℃ is ⓕ+ⓘ+ⓛ+ⓞ+ⓡ+ⓤ Therefore, it can be seen that the amount of heat of the compressor increases and decreases in proportion to the evaporation temperature.

In the present invention, the set temperature of the heat pump is set to 55°C. When analyzing the heat in/out performance of the heat pump cycle based on this, the set temperature of the heat pump is the amount of condensation heat emitted by the refrigerant, so the condensation temperature is set to 55°C. And, comparing the heat in/out performance of the air heat evaporator according to the outside temperature is as follows.

Ⓛ The amount of heat radiated by the refrigerant at a condensation temperature of 55℃ becomes the direct heat (B->C) and the heat of condensation (C->D) of the steam, so the amount of heat dissipation (Q) = direct heat + heat of condensation = (102.7-99.94) + (99.94- 70.83) = 31.87 Kcal/kg,

② When the outside temperature is 7℃, the amount of heat absorbed by the refrigerant in the evaporator becomes the latent heat of evaporation (G->H) and the amount of heat required for compression (H->B), so the amount of heat absorbed by the evaporator (Q) = latent heat of evaporation + Compressed heat = (101.09-70.83) + (102.7-101.09)= 30.26 + 1.61 = 31.87Kcal/kg,

③When the outside temperature is -20℃, the amount of heat absorbed by the evaporator (Q) = latent heat of evaporation + heat of compression = (98.9-70.83) + (102.7-98.9) = 28.07 + 3.8 = 31.87kcal/kg,

④ When the outside temperature is 15℃, the amount of heat absorbed =(101.5-70.83)+(102.7-101.05)= 30.67+1.2= 31.87kcal/kg,

⑤ When the outside temperature is 0℃, absorbed heat = (100.62-70.83)+ (102.7-100.62)= 29.79+2.08 =31.87kcal/kg,

⑥ When the outside temperature is -5℃, absorbed heat =(100.24-70.83)+(102.7-100.24)= 29.41+2.46 = 31.87kcal/kg,

⑦ When the outside temperature is -12℃, absorbed heat = (99.65-70.83) + (102.7-99.65) = 28.82 + 3.05 = 31.87kcal/kg.

From the above equation, it can be seen that the amount of heat released by the condenser and the amount of heat absorbed by the evaporator are the same, and the amount of heat absorbed by the evaporator is that as the evaporation temperature decreases, the latent heat of evaporation decreases and the amount of compression heat increases.

That is, the performance of the heat pump is determined by the amount of compressed heat, so the evaporation temperature must be raised to decrease the amount of compressed heat, thereby increasing the performance of the heat pump.

Therefore, when the outside temperature falls below zero, the performance of the heat pump in the air heat evaporator decreases, and thus the performance of the heat pump can be improved by operating the heat pump with a hot water heat evaporator using solar heat or external heat.

More specifically, when analyzing the performance of the heat pump, in general, the COP of the heat pump is calculated based on the outside temperature of 7℃, and the COP of the heat pump currently developed and distributed in the market is up to 3.4, and converted based on this The estimated and calculated COP according to the outside temperature of the power consumption 2.6KW class heat pump is as follows.

In the above equation,

ⒾIf the outside temperature is 7℃, the heat of compression is 1.61 and COP= 3.4, resulting in 3.4 COP×2.6 KW= 8.84KW.

② If the outside temperature is -20℃, the heat of compression is 3.8 and COP = 1.61/3.8 ×3.4=1.44COP ×2.6KW =3.74KW,

③If the outside temperature is 15℃, the heat of compression is 1.2 and COP = 1.61/1.2 ×3.4=4.56COP ×2.6KW=11.9KW,

④When the outside temperature is 0℃, the compression heat is 2.08 and COP = 1.61/2.08 ×3.4=2.63COP ×2.6KW= 6.84KW,

⑤ When the outside temperature is -5℃, the heat of compression is 2.46 and COP = 1.61/2.46 ×3.4=2.22COP ×2.6KW= 5.77KW,

⑥ If the outside temperature is -12℃, compression heat is 3.05 and COP = 1.61/3.05×3.4=1.79COP ×2.6KW=4.65KW.

Since the evaporation temperature adopted in the present invention becomes the outside temperature in the air heat, if the outside temperature drops below zero, the performance of the heat pump also decreases. Therefore, if the hot water heat is supplied to evaporate constantly at 0℃ by selectively changing to a hot water heat evaporator , As in the above equation, the COP becomes 2.63, so the performance of the heat pump can be kept constant.

In addition, it is possible to set the outdoor temperature setting value (ΔT14) to a desired temperature in the indoor temperature controller 131 according to the heat storage temperature stored in the heat storage tank and the external weather conditions in winter, but in the present invention, the outdoor temperature can be set from 0°C to -12°C. The control unit is configured to maintain the evaporation pressure at 0℃ by converting the air heat evaporator from the air heat evaporator to the hot water heat evaporator from the temperature set outside the indoor temperature controller to maintain the evaporation pressure at 0℃. You can improve your skills.

The reason for adjusting the outside temperature set point (ΔT14) according to the outside temperature and conditions is that if the temperature of the heat storage tank stored by solar heat is lower than 55℃, which is the solar heat exclusive heating temperature set point (ΔT12), so that solar heating is not possible, the lower temperature of the heat storage tank is set (ΔT15). The performance of the heat pump can be improved by controlling the amount of absorbed heat consumed by the hot water heat evaporator of the heat pump up to 5℃.

Supplementary explanation, when the temperature of the heat storage tank is 50 degrees, the hot water heat heater pump operates until the temperature of the heat storage tank drops to 5℃, and when the temperature of the heat storage tank falls below 5℃, the air heat heat pump is operated again.

In addition, since the evaporation temperature of the hot water heat evaporator is set to 0°C in the present invention, when the hot water heat evaporator is selected, the evaporation temperature is 0°C, and the evaporation heat is supplied from the heat storage tank, so that the air heat evaporator operates at an outside temperature of 0°C. Efficiency occurs.

In addition, it is possible to improve the performance of the heat pump by setting the hot water heat evaporation temperature high according to the season and the heat storage temperature of the heat storage tank.

In particular, the heat of compression in the above equation is 1.2 at 15°C, 2.08 at 0°C, and 3.05 at -12°C, as described earlier in Fig. 4, so the output of the inverter compressor is about 45% of the maximum output RPM at 0°C. It is possible to improve performance by minimizing power consumption by adjusting the rotation speed to the lowest RPM at 15℃ and the maximum RPM at -12℃.

In addition, based on the output calculated in the above equation, if we calculate the heating capacity of a heat pump with a power consumption of 2.6 KW based on the outside temperature of 0°C, it is 6.8 KW in the above calculation, so 6.8 kW × 860 Kcal = 5,848 kcal/hr It can be operated for 15 hours a day in winter, the same as running for 7.31 hours with a 12,000 kcal boiler at 87,720 kcal/day.

Based on this, when calculating the power consumption of the heat pump based on the 90 days of the winter season (Dec., January, February),

2.6kw × 15hr/day ×90day = 3,510 kw of electricity will be used.

Therefore, the amount of electricity generated by 3kw of solar power for home is 3.6 hours per day and calculated by arithmetic average, 3kw×3.6hr×365

Since day = 3,942 kw of electricity is produced, the power consumption of the hybrid heating system can be covered by solar power if the grid is connected with the accumulated production for the year. Since the power consumption of the heat pump is 2.6 KW, separate electricity supply or additional The power consumption of the hybrid heating system can be covered by the current household electricity supply system without expansion.

10 and 11 are matters related to a method of driving and controlling the technology of using a hybrid heating system to be realized by the present invention, and the control unit is largely a hybrid heating control unit, a solar system control unit, a heat pump control unit, and an indoor air cooling/heating control unit. It is divided into a hybrid room temperature controller control unit including.

The heat pump control unit basically includes a drive control device of the inverter heat pump system, and a heat pump heating water outlet minimum temperature control device 93 and a compressor circulating a certain portion of the heating outlet temperature supplied from the heat pump described above in FIG. It includes a control system 89 to prevent overheating of the air heat evaporator, and consists of an inverter output control device and a hot water heat evaporator TC control device according to the outside temperature and a defrost cycle control device for the air heat evaporator.

The heating water outlet temperature control device adjusts the flow rate by the electromagnetic valve M6 so that the detection temperature of the heating flow control sensor T8 is higher than the heat pump heating water outlet minimum temperature set value ΔT18.

When the compressor discharge temperature (T7) is higher than the compressor overheat prevention temperature set value (ΔT17), the compressor overheating prevention control unit 89 opens the solenoid valve 88 and the refrigerant gas cooled by the third expansion valve 94 It flows into the inlet to prevent overheating of the compressor.

In the inverter control, the outside temperature range using the air heat evaporator was set from -12℃ to 15℃, and the outside temperature range using the hot water heat evaporator was selected to be selectable from 0℃ to -12℃. T6) is set at -12℃ at the maximum RPM of 60㎐, at 15℃ at the minimum RPM at 30㎐, and at 0℃ at 45% of the maximum RPM, set it to 1,290 RPM at 43㎐ so that the output is normal. Inverter heat pump is adopted to enable efficient operation by adjusting the output of the heat pump. Since the evaporation temperature is set between 0℃ and 12℃ for the hot water heat evaporator, the output RPM of the inverted heat pump is within the range of the evaporation temperature of the air heat evaporator. Is adjusted.

Therefore, it is preferable to configure the system so that the performance of the heat pump adopted by the present invention comes out at 1,290 RPM at a frequency of 43 Hz, which is a normal output state, and operates by adjusting.

The hot water heat evaporator evaporation temperature automatic control device (TC) is a device that supplies hot water heat to evaporate at the set temperature of the improved hot water heat evaporator evaporation temperature set point (ΔT25), and the circulation pump for hot water heat evaporator (P6) It consists of a TC circuit that adjusts the amount of hot water circulation so that the evaporator temperature control range set point (ΔT24) can be maintained.

The hybrid indoor temperature controller is a controller that can easily control the entire hybrid heating system indoors, and includes a heating mode and hot water mode, an auxiliary boiler exclusive mode, an outside temperature and heat storage tank temperature display window, and an outside temperature setting function for selecting an evaporator. It includes a heat pump operating temperature display and a hot water heat evaporator operation display window.

If the room temperature controller is in the heating mode 0N and you want to heat, set the room temperature setting value (ΔT11) higher than the room temperature (ΔT11> room temperature), and the heating operation is executed. In the heating mode, the heat storage tank temperature (T2) and When the solar heating exclusive temperature set point (ΔT12) is detected and the heat storage tank temperature is higher than the heating exclusive temperature set point (T2>ΔT12), the solar heating exclusive heating mode is executed, and the heating circulation pump (P4) and fan coil unit 61 are turned on. , The circulation direction of the three-way valve on the heating circulation line is V2(A->B), V3(A->B), V4(A->B), V7(A->C), V8(A->B) , V1 (B->A) is converted and solar heating is performed.

Subsequently, when the temperature of the heat storage tank falls below 55°C, which is the solar heating-only temperature set point (ΔT12) (T2 ≤ ΔT12), it is switched to the heat pump operation mode, and the heat pump is ON, the heating circulation pump (P4) is ON, and the electric valve 99 The CLOSE and fan coil unit 61 are turned ON, and the three-way valve on the heating circulation line is V2(A->B), V3(A->C), V4(A->B), V7(A-> B), V8 (A->B), V1 (B->A) are converted, and the four-way valve 95 on the heat pump flow path is converted to A->B and condensed in the condenser 72 to exchange heat with the heating line. It passes through the three-way valve V9 (A->B), passes through the receiver tank 85 and filter dryer 81, and expands air heat through the three-way valves V5 (A->B) and V11 (A->B). It expands in the valve 73, and the four-way valve 96 is converted to A->B and evaporated in the air heat evaporator 74, and the four-way valve 97 is converted to A->B, and the three-way valve V6 (A-> B), the heat pump operation mode through the air heat evaporator, circulating in V13 (A->B), is executed.

In addition, it is possible to save energy by configuring a control system to effectively manage solar heating, reducing the heating time of the heat pump according to the season by arranging the solar heating exclusive temperature set point to be adjustable by the indoor temperature controller.

In the room temperature controller, if the heating mode is set to 0N, the entire system is sensed and the heat pump should be stopped if the room temperature set point (ΔT11) is lower than the current room temperature, but the heat storage tank heating mode is the heat storage tank temperature (T2) and the heat storage tank upper temperature set point ( When ΔT13) is detected and the heat storage tank temperature (T2) is lower than the heat storage tank upper temperature set point (ΔT13) and the outside air temperature (T6) is higher than the heat storage tank heating temperature set value (ΔT19), the heat storage tank is heated by operating the heat pump through the air heat evaporator. Thus, when the heat pump through the hot water heat evaporator operates, it performs a function of heat storage so that the heat absorbed by the evaporator can be supplied, and the heat pump mode is operated so that the indoor temperature is higher than the indoor temperature set point (ΔT11), and the heat pump operates. Even before this stops, the heat storage tank heating mode is detected to determine whether to heat the heat storage tank.

In the heat storage tank heating mode state, the circulation direction of the three-way valve V8 installed in the heating supply pipe 52 is A->C, the three-way valve V3 installed in the heating return pipe 53 is A->C, and V2 is A->B. As a result, the heating circulation line passing through the condenser 72 heats the heat storage tank and then circulates to the condenser without circulating to the heating load side to perform the heat storage tank heating operation.

In the V2 selection mode, the three-way valve V2 that controls the circulation direction of the heating return pipe 53 has a heat storage tank temperature (T2) lower than the heat storage tank upper temperature set value (ΔT13) of 50°C (T2<ΔT13), and an outside temperature (T6). When the heating temperature set point (ΔT19) of 0℃ is high (T6>ΔT19), the circulation direction of the three-way valve V2 of the heating water supply pipe is set to A->B, and the heating water return pipe is circulated through the heat storage tank. Even when the temperature is less than 50℃, under the condition that the hot water evaporator receives hot water from the heat storage tank and is used as the evaporation heat source, the heating return line converts V2 to A->C and circulates directly to the heating supply pipe without passing through the heat storage tank.

In the evaporator selection mode, the air heat evaporator is operated by default, but the outside temperature (T6) falls below the temperature set by the indoor temperature controller from 0℃ to -12℃, which is the set value for hot water heat evaporator selection (ΔT14). The hot water heat evaporator 77 operates, and the circulation direction is switched to the three-way valves V5 (A->C), V12 (A->C), and V6 (A->C) on the refrigerant gas flow path of the heat pump. The gas is circulated, expands in the expansion valve 75 for hot water heat evaporator, evaporates in the hot water heat evaporator 77 to form a circulation cycle passing through the three-way valve V13 (A->B), and the three-way valve V2 for heat storage tank heating is A -> C, and the circulation pump (P6) for hot water heat evaporator becomes 0N.

In this way, the indoor temperature controller can adjust the evaporator selection outside air temperature in consideration of the outside air environment and the heat storage tank temperature, and it can be adjusted to select the hot water heat evaporator in the best condition by reviewing the outside air temperature such as central and southern regions, and issuance of a cold wave warning. Thus, the efficiency of the heat pump can be improved.

When the hot water mode is activated in the indoor thermostat, if the hot water pipe outlet temperature sensor (T9) installed in the hot water pipe is lower than 45℃, the hot water pipe outlet temperature set point (ΔT16) (T9<ΔT16), it becomes a hot water-only operation mode for heating. The circulation pump stops and the heat pump enters the hot water only operation mode.

In addition, in the indoor thermostat, when a failure of the hybrid heating system or a case in which the system does not satisfy the heating load inevitably requires boiler heating, the heat pump system is stopped and the operation circuit converter 59 ), the operating circuit of the room temperature controller is switched to the room temperature controller 57 for a boiler, so that boiler heating is realized.

In the defrost control function, when the air heat evaporator inner surface temperature sensor 48 goes down to -5°C (T6-5°C) below the outside temperature, which is the set value of the defrost cycle start surface temperature (ΔT20), the solenoid valve 99 is opened and the flow path The upper valve 95 is circulated after being limited to A->C, 96 (C->B), and the air heat evaporator 74 changes to a condenser to perform a defrost function, and the four-way valve 97 on the flow path is (A->D) , Three-way valve V5 (A->C), V12 (A->C), V6 (A->C) circulates, expands in the hot water heat expansion valve 75 and evaporates in the hot water heat evaporator 77, The defrost cycle passing through the three-way valve V13 (A->B) is started, and when the internal surface temperature of the evaporator rises to 5℃ above the outside temperature (T6+5℃), the defrost cycle ends and the heating mode is switched.

In the indoor air cooling/heating mode, when indoor air heating is turned on with a cooling/heating controller and the indoor air heating temperature setting value (ΔT22) is set higher than the room temperature, the heat pump is turned on and the solenoid valve 99 is turned on. After being opened, the valve 95 on the flow path is converted to A->C, 96 (C->D, A->B), and V10 (A->C), and is condensed in the indoor air cooling/heating unit 92 while condensing indoors. Air heating is performed, four-way valve 97 is converted to (C->D, A->B) to circulate refrigerant gas, and the circulation cycle of the air heat evaporator is A->B for V5 and A->B for V11. The three-way valve V6 is converted to A->B, and the three-way valve V6 is converted to A->B and V13 is converted to A->B by expanding in the air heat expansion valve 73 and passing through the air heat evaporator 74 to perform indoor air heating.

In addition, when the hot water heat evaporator is selected from the indoor temperature controller, the valve V5 on the flow path is converted to A->C, V12 is converted to A->C, V6 (A->C), and expands in the expansion valve 75 to generate hot water heat. It evaporates in the evaporator 77 and forms a circulation cycle passing through V13 (A->B), and the circulation pump P6 is turned on to supply hot water heat to absorb the latent heat of evaporation.

In cooling mode, if the indoor air cooling of the cooling/heating controller is turned on and the indoor air cooling temperature setting value (ΔT23) is set lower than the indoor temperature, the heat pump is turned on, and the four-way valve 95 is A->C, and 96 is (C ->B, A->D) is converted and condensed in the outdoor unit 74, the four-way valve 97 is converted to (A->D, C->B), and the solenoid valve 99 is opened to circulate the refrigerant gas. The three-way valve V5 is converted to A->B, V11 (A->C), and V10 (A->B) to expand in the fifth expansion valve 91 for indoor cooling, and the indoor air cooling/heating unit It evaporates at (92) to heat exchange with indoor air to perform cooling, and forms an indoor air cooling cycle circulating in V6 (A->B) and V13 (A->B).

For ondol and fan coil cooling, if fan coil cooling is turned on in the cooling/heating controller and the indoor air cooling temperature set point (ΔT23) is set lower than the indoor temperature, the heat pump is turned on and the four-way valve 95 (A->C, D- >B), 96 (C->B) is converted and condensed in the outdoor unit 74, the four-way valve 97 is converted to (A->D) and the solenoid valve 99 is opened to circulate the refrigerant gas, The three-way valve V5 to A->C, V12 (A->B), expands in the sixth expansion valve 98 for cooling the fan coil and evaporates in the evaporator 72 to heat exchange with the heating coil, and A-> in V9 C, V13 (C->B) circulates to form an ondol and fan coil cooling circulation cycle.

In addition, the circulation pump P4 on the heating line is turned on and circulates to the three-way valves V2 (A->C), V8 (A->B), V3 (A->C), and V4 (A->B), respectively, The fan coil unit is turned on to perform heating and cooling of the fan coil. On the other hand, when hot water is required, the three-way valve V7 on the hot water supply line 51 is circulated in A->C so that the heat exchanged hot water can be used in the heat storage tank. This is converted and the necessary hot water can be supplied from the heat storage tank.

Although the present invention has been described as above, it is not necessarily limited to these examples and can be variously modified, and the technical protection scope proposed by the present invention should be interpreted as the characteristics and principles of the technology in the scope of the claims, and similar It should be seen that all technical matters within the same range are included in the rights of the present invention.

100: solar system
10: heating medium circulation line
12: water supply pipe
14: Solar heat collecting part high temperature sensor (T1)
15: safety valve for heat medium
18: expansion tank for heat medium
19: Electric valve for heat medium control (M1)
20: Four-way valve for controlling the direction of heat medium circulation (M2)
22: service tank for storage and circulation of heat medium
23: air chamber
25: outside temperature sensor (T6)
26: Compressor discharge temperature sensor (T7)
27: temperature sensor for heating flow control (T8)
28: Hot water pipe outlet temperature sensor (T9)
30: sealed expansion tank
130: heat storage tank (heat storage tank)
33: heat storage tank high temperature sensor (T2)
34: water supply pressure switch
42: water supply differential pressure electric valve (M3)
45: heat storage tank low temperature sensor (T5)
46: hot water heat evaporator temperature sensor (T10)
47: evaporator outlet refrigerant gas temperature sensor (T11)
48: air heat evaporator inner surface temperature sensor (T12)
49: evaporator inlet refrigerant gas temperature sensor (T13)
500: Hybrid heating use unit
50: heating auxiliary boiler
51: hot water line (hot water pipe)
52: solar heating supply pipe
53: solar heating return pipe
54: heating load circulation line
56: 3-way valve for heating circulation direction control (V4)
57: room thermostat for auxiliary boiler
58: hybrid room thermostat
59: Signal converter for selection of room thermostat
60: heat storage tank solar system control panel
61: fan coil unit
62: TC circuit
700: heat pump system
710: All-in-one case for heat pump
70: compressor
71: refrigerant circulation pipe
72: condenser
73: first expansion valve for air heat evaporator
74: air heat evaporator (outdoor unit)
75: second expansion valve for hot water heat evaporator
76: heat pump heating flow control valve (M6)
77: hot water heat evaporator
78: hot water heat supply pipe
79: hot water heat return pipe
80: accumulator
81: filter dryer
82: compressor overheating control tube
83: oil separator
84: Solenoid valve for oil separator (M7)
85: receiver tank
86: evaporator refrigerant line for air heat
87: fan for evaporator
88: Overheating prevention control valve (M8)
89: compressor overheating prevention control unit
90: fourth expansion valve for liquid separator
91: 5th expansion valve for indoor cooling
92: Indoor air cooling and heating unit
93: heat pump heating outlet minimum temperature control device
94: Compressor overheating prevention adjustment third expansion valve
95: first 4-way valve
96: 2nd 4-way valve
97: 3rd 4-way valve
98: the sixth expansion valve for cooling the fan coil
99: solenoid valve for preventing backflow
Ⓐ: Air heat evaporator outlet
Ⓑ: Air heat evaporator entrance
Ⓒ: Hot water heat evaporator outlet
Ⓓ: Hot water heat evaporator entrance
Ⓔ: Heating return pipe exit
Ⓕ: Entrance to the heating return pipe
Ⓖ: heating supply pipe outlet
Ⓗ: Heating supply pipe entrance
Ⓘ: Hot water pipe entrance
Ⓙ: Hot water pipe outlet
Ⓚ: Indoor unit supply pipe outlet
Ⓛ: Indoor unit return pipe entrance
Ⓜ: Indoor air cooling/heating unit entrance
Ⓝ: Indoor air cooling/heating unit outlet
1000: solar system
101: panel for power supply for hybrid system
102: solar array
103: inverter
104: relay for grid connection
1300: drive control unit
131: Hybrid indoor temperature controller
132: hybrid cooling. Heating regulator
V1: Three-way valve for hot water supply control
V2: Three-way valve for solar heat and heat pump heating circulation direction control
V3: Three-way valve for heat pump heating
V4: Three-way valve for auxiliary boiler control (M4)
V5: Three-way valve for controlling air heat evaporator
V6: Three-way valve for controlling hot water heat evaporator
V7: Three-way valve for hot water
V8: Three-way valve for heat storage tank heating
V9: Three-way valve for fan coil
V10: Three-way valve for indoor air heating
V11: Three-way valve for indoor air cooling
V12: three-way valve for evaporator selection
V13: Three-way valve for fan coil refrigerant return
K1: compressor outlet pressure sensor
K2: Compressor inlet pressure sensor
P1: circulation pump for heat medium
P3: circulation pump for boiler heating
P4: Heating circulation pump for solar heat and heat pump
P5: Pump for initial circulation of heat medium
P6: circulation pump for hot water heat evaporator

ΔT11: room temperature set point
ΔT12: Solar heating exclusive temperature (T2) set value (55℃ setting)
ΔT13: Heat storage tank heating temperature (T2) set value (50℃ set)
ΔT14: Outside temperature (T6) setting value for hot water heat evaporator selection (0℃~ -12℃ setting)
ΔT15: Temperature under the heat storage tank (T5) set value (5℃ set)
ΔT16: Hot water pipe outlet temperature (T9) set point (45℃ setting)
ΔT17: Compressor overheating prevention temperature set point (65℃ setting)
ΔT18: heat pump heating water outlet minimum temperature set point (40℃ set)
ΔT19: Heat storage tank heating temperature set point (0℃)
ΔT20: defrost cycle start surface temperature (48) set value (T6 -5℃)
ΔT21: Surface temperature at the end of the defrost cycle (48) Set value (T6 + 5℃)
ΔT22: indoor air heating temperature set point
ΔT23: indoor air cooling temperature set point
ΔT24: Control range of hot water heat evaporator evaporation temperature (±0.5℃)
ΔT25: Hot water heat evaporator evaporation temperature set point (0℃~ 12℃)

Claims (12)

When the hot water stored by the solar system 100 is used for direct heating and hot water, or when the temperature of the heat storage tank falls below the heating-only temperature set point, when heating the heat pump to cover the insufficient heating load, the hot water heat from the heat storage tank is Solar heat utilization technology that supplies heat pump evaporation heat source, solar system 900 that receives all or part of the power consumption by sunlight, air heat evaporator and hot water heat evaporator, and evaporation heat source of evaporator is air heat and heat storage tank Hybrid heating system including an operating method and a drive control unit 1000 of the heat pump system 700 that can be selectively utilized according to the outside temperature of the hot water heat. In the heat pump system 700,
During the cycle of compression-condensation-expansion-evaporation of the heat pump, a control unit including a condensation heat exchange device and a control method selectively operated for heating, hot water, and heat storage tank heating the radiated heat of the condenser, and the evaporation heat source of the evaporator with air heat. In the evaporator selection mode, which is selectively used among the hot water heat of the storage tank, the heat pump system is basically operated as an air heat evaporator, but in order to prevent the performance of the heat pump from dropping as the outside temperature (T6) falls below zero, the hot water heat evaporator is selected. A hot water heat evaporator, characterized in that when the indoor temperature set point (ΔT14) is set to a desired temperature in the indoor temperature controller 131, the heat pump system through the hot water heat evaporator is operated from the set outside temperature to improve the performance of the heat pump. Outside temperature setting function for selection. In the air heat evaporator, a temperature type automatic expansion valve is installed to control the amount of refrigerant according to the outside air temperature, and the output RPM can be adjusted by adopting an inverter heat pump system, and the internal surface temperature 48 and the outside air temperature ( When T6) is the defrost cycle start surface temperature set point (ΔT20), the defrost cycle starts, and when the end surface temperature set point (ΔT21), the defrost cycle ends and returns to the heat pump heating system. In the hot water heat evaporator, an evaporator temperature sensor 46 and a circulation pump for supplying hot water heat supplying hot water heat within the evaporation temperature control range ΔT24 so that it can evaporate constantly at a set temperature of the evaporation temperature set value (ΔT25). It is a control device that can adjust the circulation amount by configuring P6) as a TC circuit, and it features a circulation amount control device of the hot water heat circulation pump that can improve the performance of the heat pump by efficiently using the heat of the limited heat storage tank by adjusting and supplying the evaporation heat. Hot water heat evaporator evaporation temperature control device. In the solar-only hot water and heating mode, the indoor temperature controller 131 configures a control function to arbitrarily adjust the solar heating-only temperature set point (ΔT12) according to the season and environment, thereby minimizing the operation time of the heat pump to reduce energy consumption. Temperature adjustment control function exclusively for solar heating that can reduce. In the drive control unit 1000,
In the hybrid control panel 91, a solar system control panel 60, a hybrid heating control unit, and a hybrid indoor temperature controller 1100 are provided, and in the heating mode control program of the indoor temperature controller, the indoor temperature set value (ΔT11) is When the temperature is higher than the room temperature, the heating mode is activated. In the heating mode, when the heat storage tank temperature (T2) is higher than the solar heating exclusive temperature set point (ΔT12), solar hot water and heating are executed, and when the storage tank temperature is lower than ΔT12, the heat pump mode is activated The proportional control program in which the heat storage tank temperature is selectively controlled based on ΔT12 in the solar power exclusive mode and the heat pump mode. During the process of hot water and heating in the heat pump mode, when the hot water function is selected by the indoor controller, the hot water pipe outlet temperature (T9) is sensed, and if the water outlet temperature is higher than the hot water pipe outlet temperature set point ΔT16, the heat pump system will There is no change in the combined mode, but when the water outlet temperature is lower than ΔT16, the heat pump system is switched to the hot water exclusive operation mode, and the heating circulation pump (P4) is stopped and controlled in the hot water exclusive operation mode, so that the heat storage tank temperature is the temperature required for hot water use. A heat pump system that is proportionally controlled so that the desired hot water can be obtained with the heat pump even if it falls below. In heat pump mode,
When the indoor temperature set point (ΔT11) is lower than the indoor temperature (ΔT11 <indoor temperature), the heat pump system does not stop immediately, but the heat storage tank temperature (T2) is detected, and T2 is lower than the heat storage tank upper temperature set point (ΔT13) and outside air. If the temperature (T6) is higher than the heat storage tank heating temperature set point (ΔT19), the heat pump through the air heat evaporator operates in the heat storage tank heating mode to heat the heat storage tank, and the heat storage tank hot water at night when the outside temperature decreases by increasing the heat storage temperature. Heat storage tank heating mode function that can maintain the COP of the heat pump by operating the heat pump system with the evaporator. In heat pump mode,
In the three-way valve V2 that selectively controls the heating circulation line 53, the heat storage tank temperature T2 is lower than the heat storage tank upper temperature set point (ΔT13) (T2<ΔT13) and the outside temperature (T6) is less than the heat storage tank heating temperature set point (ΔT19). If it is high (T6>ΔT19), the circulation direction of the three-way valve V2 is controlled from A->B, and the heat pump through the air heat evaporator heats the heat storage tank, and the heat pump through the hot water heat evaporator adjusts the outside temperature set point (ΔT14). When is activated, V2 of the heating line is transferred to A->C and is controlled to circulate directly to the heating supply pipe without passing through the heat storage tank, so that the heat pump through the heat storage tank hot water evaporator does not heat the heat storage tank again. Controlled proportional control system. In the room temperature controller for controlling a hybrid heat pump heating system,
With hybrid heating ON-OFF function, indoor temperature setting function, and solar heating exclusive temperature setting function of the heat storage tank, each desired temperature can be adjusted.In the heat pump mode for both heating and hot water use, hot water when hot water is insufficient in use temperature Including the exclusive mode function and the function to switch to the auxiliary boiler exclusive operation mode, the set value (ΔT14) for converting the evaporator of the heat pump from the air heat evaporator to the hot water heat evaporator is considered in consideration of the outside temperature and ambient environmental conditions. A hybrid heat pump heating control room temperature controller with a function that can be changed and has a function to set the evaporation temperature of the hot water heat evaporator. Cool indoor air. In heating mode, cool. When fan coil cooling is turned on with a heating controller and the indoor air cooling temperature setting value (ΔT23) is set lower than the indoor temperature, the heat pump and fan coil unit are turned on, and the air heat evaporator 74 is converted to a condenser to circulate the refrigerant gas. It expands in the sixth expansion valve for fan coil cooling, and the condenser 72 is converted to the evaporator to absorb the evaporation heat, and the circulation direction is switched from the three-way valve V9 to A->C to form an ondol and fan coil cooling cycle. , The heating circulation line of the evaporator 72, which is cooled by taking the evaporation heat, is circulated with the circulation pump P4 turned ON to realize ondol cooling and fan coil cooling, and the three-way valve V7 of the hot water supply line is A to receive the necessary hot water from the heat storage tank. Hybrid ondol and fan coil cooling control function that can be converted to ->C to receive necessary hot water. In order to stably maintain the performance of the hybrid cooling/heating system, it is integrated and assembled into one case, and the air heat evaporator and heat storage tank connection part and the heating load connection part separately installed on the outside are arranged separately to improve workability, and indoor air cooling and heating system In addition, it is an all-in-one hybrid cooling/heating system that can easily connect and assemble the heating and cooling of the ondol and fan coil.

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