KR20130111186A - Hybrid heating apparatus and method thereof - Google Patents

Abstract

PURPOSE: A hybrid heating device and a method thereof are provided to improve the reliability, economic efficiency, and energy efficiency of a product by combining a heat pump with a high performance coefficient and a gas hot water supply device with low primary energy consumption. CONSTITUTION: A hybrid heating device comprises a storage tank (1), a heat pump (2), a bypass (12), a hot water supply device (3), and a control unit. A first condenser (13a) is arranged on the heat pump to heat water inside the storage tank. The bypass is branched from an inlet and is united in a hot water supply unit (7). The control unit controls the operation of the heat pump and the hot water supply device based on the temperature of hot water inside the storage tank. The control unit controls the flow rate of a fluid which flows through the bypass. The control unit controls the operation of circulation pumps (11, 20) which circulate hot water in a heating area from the storage tank. [Reference numerals] (AA) Hot-water supply; (BB) Gas; (CC) Water supply

Description

Hybrid type hot water supply device and control method thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid hot water supply device and a control method thereof, and more particularly, to a hybrid hot water supply device and a control method thereof in which a heat pump and a hot water heater are combined to increase energy efficiency.

Generally, a domestic hot water supply apparatus includes a gas hot water heater and an electric water heater.

The gas hot water heater is used to heat a hot water in a bathroom, such as hot water, as the gas is heated to heat the water supply, and is also used for heating because the water is heated and circulated.

On the other hand, the electric water heater heats and stores the water in the storage tank with an electric heater so that the hot water can be hot-watered from the storage tank where necessary.

Since gas water heaters are not used for water supply heating and emit a lot of combustion gases, the coefficient of performance (COP; heating efficiency) is assumed to be 1 when the coefficient of performance of an electric heater in an electric water heater is assumed to be 1 The coefficient is 0.82.

If the energy efficiency of the hot water supply device is defined as the ratio of the amount of heat used to the amount of primary energy (electric power) used, the gas hot water heater uses less power, so the energy efficiency is high even though the performance coefficient is low. On the other hand, since the electric water heater consumes a lot of power by the electric heater, the energy efficiency is low even if the performance coefficient of the electric heater is high.

Embodiments of the present invention relate to a hybrid hot water supply device and a control method thereof in which a heat pump having a high coefficient of performance and a hot water heater having a low primary energy consumption can be combined to improve energy efficiency.

Hybrid type hot water supply apparatus according to an embodiment of the present invention,

A storage tank having a water supply port and a hot water supply port and storing the heated water;

A heat pump having a first condensation unit for heating water in the storage tank;

A first bypass pipe branched from the water supply port and joined to the water supply port;

A hot water heater installed in the first bypass pipe and heating water moved along the first bypass pipe;

Control the operation of the heat pump and the hot water heater according to the hot water temperature of the storage tank, control the flow rate moving along the first bypass pipe, and control the operation of the circulation pump for circulating the hot water from the storage tank to the heating zone. It provides a hybrid hot water supply device comprising a control unit.

Hybrid type hot water supply apparatus according to another embodiment of the present invention,

A storage tank having a water supply port and a hot water supply port and storing the heated water;

A first bypass pipe branched from the water supply port and joined to the water supply port;

A second bypass pipe branched from the first bypass pipe, the second bypass pipe joining the hot water moved along the inner pipe and heated to the hot water of the first bypass pipe;

A first condenser installed in the first bypass pipe, the first condenser for heating water moved along the first bypass pipe by a refrigerant from a heat pump;

A second condensation portion communicating with the first condensation portion and the heat pump and heating the water in the irrigation reservoir so as to heat water moved along the second bypass pipe due to mutual heat exchange with water in the irrigation reservoir;

A circulation pump for controlling the operation of the heat pump according to the hot water temperature of the storage tank and the irrigation water storage unit, controlling the flow rate moving along the first and second bypass pipes, and circulating hot water from the storage tank to the heating zone. It provides a hybrid hot water supply device comprising a control unit for controlling the operation of the.

The control method of the hybrid hot water supply apparatus according to an embodiment of the present invention,

A storage tank for storing the heated water;

A heat pump for heating the water in the storage tank;

A hot water heater for heating water which is branched from the water inlet and moved along the first bypass pipe joined to the hot water inlet;

Control the operation of the heat pump and the hot water heater according to the hot water temperature of the storage tank, control the flow rate moving along the first bypass pipe, and control the operation of the circulation pump for circulating the hot water from the storage tank to the heating zone. In a control method of a hybrid hot water supply device, characterized in that it comprises a control unit:

A first heating step of heating water in the storage tank to a first temperature set by the heat pump;

A second heating step of heating to a second temperature higher than the first temperature by the hot water heater;

Provided is a control method of a hybrid hot water supply device, characterized in that the third heating step of heating to a third temperature lower than the first temperature by the heat pump.

And a temperature detection sensor configured to detect the water temperature of the storage tank in real time and transmit a detection signal to the controller.

And a temperature detection sensor for detecting the water temperature of the storage tank and the irrigation storage in real time and transmitting detection signals to the control unit, respectively.

The heat pump

It is characterized in that it is in communication with the thawing pipe branched from the first bypass pipe to supply hot water to the evaporator so as to prevent frost generated in the evaporator of the heat pump or to remove frost generated in the evaporator.

The first condensation part may be installed in the storage tank, or the first condensation part may be installed in the first bypass pipe located outside the storage tank.

The water in the storage tank

The heat dissipation of the refrigerant by the first condensation unit moving from the heat pump, and the heat exchange tube and the heat exchange tube to move the water from the heating zone is characterized in that the heating.

The hot water heater is characterized in that the gas water heater or petroleum water heater.

The water in the storage tank is first heated to 60 ℃ by the first condensation of the heat pump, it is characterized in that it is heated second to 90 ℃ by the hot water heater.

The second condensation unit is provided in series communication with the first condensation unit installed in the irrigation storage unit, wherein the second condensation unit is disposed at a position relatively higher than the first condensation unit on the storage tank side.

The irrigation reservoir is characterized in that it comprises an auxiliary heating means using gas or petroleum.

When the difference between the hot water temperature in the storage tank is more than the set temperature, characterized in that the controller controls the state in the storage tank.

In the first heating step, the heat pump is operated using night power.

Hybrid type hot water supply apparatus and a control method according to an embodiment of the present invention configured as described above has the following effects.

The combination of a heat pump with a high coefficient of performance and a gas water heater with low primary energy usage improves energy efficiency, thereby increasing the reliability and purchasing power of the product.

1 is a block diagram of a hybrid hot water supply apparatus according to an embodiment of the present invention,
2 is a view showing a temperature change in a storage tank in a hybrid hot water supply apparatus according to an embodiment of the present invention;
3 is a graph showing a correlation between a condenser outlet temperature and a performance coefficient of a heat pump in a hybrid hot water supply device according to an embodiment of the present invention;
4 is a block diagram of a hybrid hot water supply apparatus according to another embodiment of the present invention;
5 is a block diagram of a hybrid hot water supply apparatus according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

Hybrid hot water supply apparatus according to an embodiment of the present invention shown in Figure 1 and 2,

A water supply port 6 connected to a faucet, etc., and a water supply opening 7 for supplying hot hot water to a bathroom are provided, and a storage tank for storing water heated (e.g., about 55 to 60 ° C). (1) (can be formed as a cylindrical container capable of holding about 120 liters as an example),

A heat pump 2 provided with a first condensation part 13a for heating water in the storage tank 1;

A first bypass pipe (12) branched from the water inlet (6) and joined to the hot water inlet (7),

A hot water heater 3 installed in the first bypass pipe 12 to heat water moved along the first bypass pipe 12;

Control the operation of the heat pump (2) and the hot water heater (3) in accordance with the hot water temperature of the storage tank (1), and open the electromagnetic opening and closing valve (8) to control the flow rate that is moved along the first bypass pipe (12) And a controller 5 for controlling the operation of the circulation pump 11 for circulating the hot water from the storage tank 1 to the heating zone 19.

It may include a temperature detection sensor 9 for detecting the water temperature of the storage tank 1 in real time to transmit a detection signal to the control unit (5).

Although not shown in the drawings, the heat pump 2 is composed of a compressor, a condenser, an expansion valve, and an evaporator, and a refrigeration cycle configuration for circulating a refrigerant is a configuration used in the technical field to which the present invention belongs, Omit.

The heat pump 2

A defrosting pipe line branched from the first bypass pipe 12 to supply hot water to the evaporator so as to prevent frost from the evaporator (not shown) of the heat pump 2 or to remove frost generated in the evaporator. 14).

The first condensation part 13a may be installed in the storage tank 1.

The water stored in the storage tank 1 is

The heat dissipation of the refrigerant by the first condensation part 13a moving from the heat pump 2 and the heat exchange tube 17 through which water is moved from the heating zone 19 may be heat exchanged.

The hot water heater 3 may be a gas water heater or a petroleum water heater.

The water in the storage tank 1 may be primarily heated up to 60 ° C. by the first condensation part 13a of the heat pump 2 and then heated up to 90 ° C. by the hot water heater 3.

Hybrid type hot water supply apparatus according to another embodiment of the present invention shown in Figure 4,

A water supply port 6 connected to a faucet, etc., and a water supply opening 7 for supplying hot hot water to a bathroom are provided, and a storage tank for storing water heated (e.g., about 55 to 60 ° C). (1) (can be formed as a cylindrical container capable of holding about 120 liters as an example),

A first bypass pipe (12) branched from the water inlet (6) and joined to the hot water inlet (7),

A heat pump (2) installed in the first bypass pipe (12) and heating water in the storage tank (1) by a first condensation (13a) located outside the storage tank (1);

A first bypass pipe (12) branched from the water inlet (6) and joined to the hot water inlet (7),

It is installed in the first bypass pipe (12), while heating the water of the storage tank (1) along the first bypass pipe (12) by applying heat to the water (for example, a gas water heater may be used) is heated With hot water heater (3) to say,

Control the operation of the heat pump (2) and the hot water heater (3) in accordance with the hot water temperature of the storage tank (1), and open the electromagnetic opening and closing valve (8) to control the flow rate that is moved along the first bypass pipe (12) And a controller 5 for controlling the operation of the circulation pump 11 for circulating the hot water from the storage tank 1 to the heating zone 19.

At this time, the configuration except for the first condensation portion 13a installed in the first bypass pipe 12 to heat the water in the storage tank 1 is a hybrid type according to an embodiment of the present invention shown in FIG. Since the configuration is the same as that of the hot water supply device, detailed descriptions of these structures are omitted, and reference numerals denote the same parts constituting the hybrid hot water supply device.

Hybrid type hot water supply apparatus according to another embodiment of the present invention shown in Figure 5,

A storage tank 1 having a water supply port 6 and a hot water supply port 7 for storing heated water;

A first bypass pipe (12) branched from the water inlet (6) and joined to the hot water inlet (7),

A second bypass pipe 22 which branches from the first bypass pipe 12 and moves hot water moved along the inner pipe to be joined to the hot water of the first bypass pipe 12 by the three-way valve 23;

The first condensation is installed in the first bypass pipe 12, the first condensation for heating the water moved along the first bypass pipe 12 by the refrigerant from the heat pump (for example to 60 ℃) Section 13a,

The irrigation reservoir communicates with the first condensation portion 13a and the heat pump 2 and heats water moved along the second bypass pipe 22 by mutual heat exchange with water in the irrigation reservoir 18. A second condensation part 13b for heating (in one example, heating to 90 ° C.) water in (18),

Control the operation of the heat pump (2) in accordance with the hot water temperature of the storage tank (1) and irrigation storage unit 18, and controls the flow rate to be moved along the first and second bypass pipes (12, 22), and storage And a control unit 5 for controlling the operation of the circulation pump 20 for circulating the hot water from the tank 1 to the heating zone 19.

The second condensation part 13b installed in the water supply storage part 18 is connected in series with the first condensation part 13a, and the second condensation part 13b is a first condensation part on the storage tank 1 side. It may be disposed at a position relatively higher than 13a.

The irrigation reservoir 18 may include auxiliary heating means 25 using gas or petroleum.

It may include a temperature detection sensor (9, 21) for detecting the water temperature of the storage tank 1 and the irrigation storage unit 18 in real time to transmit the detection signal to the control unit (5), respectively.

At this time, the second bypass pipe 22 branched from the first bypass pipe 12, the first condensing portion (13a) and the heat pump (2) in communication with the water moved along the second bypass pipe (22) Except for the second condensation portion 13b for heating the water in the watering reservoir 18 so as to be heated by mutual heat exchange with the water in the watering reservoir 18, another embodiment of the present invention shown in FIG. Since the configuration is the same as the configuration of the hybrid hot water supply apparatus according to the example, detailed descriptions of these configurations are omitted, and the reference numerals denote the same parts forming the hybrid hot water supply apparatus.

The control method of the hybrid hot water supply apparatus according to an embodiment of the present invention shown in Figure 1,

A storage tank 1 for storing heated water,

A heat pump (2) for heating the water in the storage tank (1),

A hot water heater 3 for heating water moved along the first bypass pipe 12 branched from the water inlet 6 and joined to the hot water inlet 7;

Control the operation of the heat pump (2) and the hot water heater (3) in accordance with the hot water temperature of the storage tank (1), control the flow rate moving along the first bypass pipe (12), heating from the storage tank (1) In the control method of the hybrid hot water supply device, characterized in that it comprises a control unit (5) for controlling the operation of the circulation pump 20 for circulating the hot water in the zone (19),

A first heating step of heating the water in the storage tank 1 to a first temperature set by the heat pump 2 (for example, to 60 ° C.);

A second heating step of heating to the second temperature higher than the first temperature (for example, heated to 90 ° C.) by the hot water heater 3;

A third heating step is performed by the heat pump 2 to heat to a third temperature lower than the first temperature (for example, to 50 ° C.).

When the difference between the hot water temperature in the storage tank 1 occurs above the set temperature, the controller 5 may control the interface in the state of the storage tank 1 by using a non-mixing property.

In the first heating step, the heat pump 2 may be operated by using midnight power.

Hereinafter, a hybrid hot water supply apparatus and a control method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the storage tank 1 is filled with water through the water supply port (6). The heat pump 2 is operated using the midnight electric power to heat the water in the storage tank 1 by convective heat transfer. Since the heat-expanded hot water of the storage tank 1 is supplied to the evaporator of the heat pump 2 through the thawing pipe 14 by an expansion valve or the like, it is possible to prevent the build-up of the vaporizer or to remove frost.

When the hot water in the storage tank 1 reaches a maximum of about 60 ° C., it is maintained in this state and stored. The hot water in the storage tank 1 may radiate to 60 ° C to 55 ° C. When the hot water in the storage tank 1 is discharged to the bath or the like through the hot water inlet (7), the water is discharged from the storage tank (1) is filled by the amount of water used.

For example, the inside of the storage tank 1 is in a state of being separated as hot water of about 55 ° C in the upper part and water of about 15 ° C in the lower part. When the proportion of hot water in the storage tank 1 is reduced, the heat pump 2 is driven to maintain the inside of the storage tank 1 as hot water at about 55 ° C.

When heating is required, the circulation pump 11 is driven to circulate water in the storage tank 1 through the first bypass pipe 12. At the same time, the water heater 3 installed in the first bypass pipe line 12 is driven to heat the water passing through the first bypass pipe line 12 with hot water. For this reason, the hot water in the storage tank 1 can be raised to 90 degreeC. In this state, the temperature of the hot water in the storage tank 1 is maintained.

The hot water in the storage tank 1 by the heat exchange tube 17 is driven by driving the circulation pump 11 when heating is required and simultaneously driving the circulation pump 20 toward the heating zone 19. Heating water for heat exchange with the supply to the heating zone (19).

When only hot water is used without heating, the water in the storage tank 1 is heated to about 55 ° C and stored. Then, when hot water is heated in a place other than a bathroom, and 55 degreeC hot water of the upper part of the storage tank 1 reduces, the heat pump 2 is driven and the inside of the storage tank 1 heats about 55 degreeC. Keep the water and repeat it.

As in FIG. 2, hot water in the storage tank 1 will typically remain in full water. When hot water is used from the top of the storage tank 1 to the A position occupying one third volume through the hot water inlet 7, the heat pump 2 is operated to heat the water in the storage tank 1. As a result, when the hot water increases to the B position occupying 1/2 volume of the storage tank 1, the operation of the heat pump 2 is stopped.

Here, assuming that the water temperature is T0 and the water supply amount is W0, the used hot water amount W is expressed by the following equation.

8 = 40 × 40-40

The set temperature T1 is expressed by the following equation.

T1 = (40-T0) × W / 120

If the reference set temperature is T2, the set temperature is T2 in the case of T1? T2, and the set temperature is T1 in the case of T1> T2. However, T1 should not be set above 90 ℃.

Here, when the temperature difference of water in the storage tank (1) occurs in a normal case or more than a predetermined temperature, the state in the storage tank (1) is interface controlled by the control unit (5) by using a non-mixing property.

As shown in FIG. 3, the heat pump 2 is known to have a high coefficient of performance (COP) when the outlet temperature of the condenser is low, and a low coefficient of performance when the outlet temperature of the condenser is high.

In the hybrid type hot water supply device of the present invention, the heat pump 2 is operated within the range of the outlet temperature of the condenser from 50 ° C to 60 ° C, and the water in the storage tank 1 is heated up to about 60 ° C. Therefore, the coefficient of performance (COP) is in the range of 5 to 4.

Table 1 below shows the energy efficiency of the hybrid hot water supply device according to the present invention and the energy efficiency of a conventional gas water heater and an electric water heater.

As shown in Table 1, the amount of heat used for the hot water supply was calculated under the assumption that the water supply temperature of the storage tank 1 is 15 ° C and hot water of 40 ° C is used for 700 liters per day.

On the other hand, the amount of heat used for heating calculated the amount of heat used for heating under the assumption that the 16,000 kcal / h water heater is operated for one hour a day. The primary energy consumption is assumed to be 37% of power generation efficiency in equipment use stage considering transmission loss.

Comparison table of energy efficiency Conventional technology The
Hybrid hot water heater Gas water heater Electric water heater Hot water calorie (kcal / day)
17,500 17,500 17,500
② Heating calories (kcal / day)
16,000 16,000 16,000 ③ The amount of heat released from the equipment (kcal / day)
350 3,500 1,000 ④ Usage of heat (kcal / day)
④④①①② 33,5000 33,500 33,500 ⑤The amount of heat generated from consumption + apparatus of heat
（⑤ = ④ + ③） 33,850 37,000 34,500 ⑥ Performance factor COP 0.82 1.0 Heat pump: 4.0
Gas water heater: 0.82 ⑦ Calories consumed by the device (kcal / day) 41,280
（⑤ ÷ ⑥） 37,000
（⑤ ÷ ⑥） Heat Pump: 8,100
（(⑤ / 2） ÷ ⑥）
Gas water heater: 4,390
（(⑤ / 2） ÷ ⑥） ⑧Use of primary energy (kcal / day)
43,110 100,000 32,692 ⑨ Energy efficiency
（⑨ ＝ ④ ÷ ⑧） 0.811 0.31 1.025

As shown in Table 1, the energy efficiency of the hybrid hot water supply apparatus according to an embodiment of the present invention is relatively higher than the conventional gas water heater, electric water heater, it can be confirmed that a significant energy saving effect can be obtained.

One; Storage tank
2; Heat pump
3; Water heater
5; The control unit
6; Water supply
7; Hot Water Spout
8; Solenoid valve
9,21; Temperature sensor
11,20; Circulation pump
12; First bypass pipeline
13a; First condensation
13b; 2nd condensation part
14; Thawing pipe
17; Heat exchanger tube
18; Watering reservoir
19; Heating zone

Claims (14)

A storage tank having a water supply port and a hot water supply port and storing the heated water;
A heat pump having a first condensation unit for heating water in the storage tank;
A bypass pipe branched from the water supply port and joined to the water supply port;
A hot water heater installed in the bypass pipe and heating water moved along the bypass pipe;
A control unit controls the operation of the heat pump and the hot water heater according to the hot water temperature of the storage tank, controls the flow rate moving along the bypass pipe, and controls the operation of the circulation pump for circulating the hot water from the storage tank to the heating zone. Hybrid type hot water supply device comprising a. A storage tank having a water supply port and a hot water supply port and storing the heated water;
A first bypass pipe branched from the water supply port and joined to the water supply port;
A second bypass pipe branched from the first bypass pipe, the second bypass pipe joining the hot water moved along the inner pipe and heated to the hot water of the first bypass pipe;
A first condenser installed in the first bypass pipe, the first condenser for heating water moved along the first bypass pipe by a refrigerant from a heat pump;
A second condensation portion communicating with the first condensation portion and the heat pump and heating the water in the irrigation reservoir so as to heat water moved along the second bypass pipe due to mutual heat exchange with water in the irrigation reservoir;
A circulation pump for controlling the operation of the heat pump according to the hot water temperature of the storage tank and the irrigation water storage unit, controlling the flow rate moving along the first and second bypass pipes, and circulating hot water from the storage tank to the heating zone. Hybrid type hot water supply device comprising a control unit for controlling the operation of the. The hybrid hot water supply apparatus according to claim 1, further comprising a temperature detection sensor which detects the water temperature of the storage tank in real time and transmits a detection signal to the controller. The hybrid hot water supply apparatus according to claim 2, further comprising a temperature detection sensor which detects the water temperature of the storage tank and the irrigation water storage unit in real time and transmits a detection signal to the controller. The method of claim 1, wherein the heat pump
Hybrid hot water supply device characterized in that the branched from the bypass pipe is connected to the thawing pipe for supplying hot water to the evaporator so as to prevent frost generated in the evaporator of the heat pump or to remove frost generated in the evaporator. The hybrid hot water supply device according to claim 1, wherein the first condensation part is installed in the storage tank, or the first condensation part is installed in the bypass pipe located outside the storage tank. According to claim 1, wherein the water in the storage tank
The heat dissipation of the refrigerant by the first condensation unit is moved from the heat pump, and the heat exchanger is heated by mutual heat exchange with the heat exchange tube to move the water from the heating zone. The hybrid hot water supply apparatus according to claim 1, wherein the hot water heater is a gas water heater or a petroleum water heater. The hybrid type hot water supply device according to claim 1, wherein the water in the storage tank is primarily heated up to 60 ° C by the first condensation part of the heat pump and then heated up to 90 ° C by the hot water heater. . The method of claim 2, wherein the first condensation unit communicates in series with a second condensation unit provided in the water storage unit, wherein the second condensation unit is disposed at a position higher than the first condensation unit on the storage tank side. Hybrid type hot water supply device. 3. The hybrid hot water supply apparatus according to claim 2, wherein the irrigation water storage unit includes auxiliary heating means using gas or petroleum. A storage tank for storing the heated water;
A heat pump for heating the water in the storage tank;
A hot water heater for heating water which is branched from the water inlet and moved along a bypass pipe joined to the hot water inlet;
A control unit controls the operation of the heat pump and the hot water heater according to the hot water temperature of the storage tank, controls the flow rate moving along the bypass pipe, and controls the operation of the circulation pump for circulating the hot water from the storage tank to the heating zone. In the control method of the hybrid type hot water supply device comprising:
A first heating step of heating water in the storage tank to a first temperature set by the heat pump;
A second heating step of heating to a second temperature higher than the first temperature by the hot water heater;
And a third heating step of heating to a third temperature lower than the first temperature by the heat pump. The method of claim 12, wherein when the difference between the hot water temperature in the storage tank is greater than or equal to a predetermined temperature, the controller controls the state in the storage tank at the interface. The method of claim 12, wherein the heat pump is operated using a midnight electric power in the first heating step.

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