KR20120110403A - Hiting system using heat of condensation - Google Patents

Abstract

PURPOSE: A heating system using condensation heat is provided to improve heat energy efficiency by supplying hot water heat exchanged from a first waste heat recovery device to a second waste heat recovery device. CONSTITUTION: A heating system using condensation heat composed of first and second waste heat recovery device(21, 50), a hot water connection line(561), and a heating unit(60). The second waste heat recovery device collects the condensed sensible heat of coolant discharged from a compressor(10) and installed between a condenser(20) and the compressor. The hot water connection line connects the first and the second waste heat recovery device by supplying hot water in a first waste heat recovery device to the second waste heat recovery device for heat exchange. The heating unit produces steam by heating the hot water discharged from the second waste heat recovery device. Tap water is supplied to the first waste heat recovery device and the second waste heat recovery device receives hot water discharged from the first waste heat recovery device and the hot water outlet(571) of the second waste heat recovery device is connected to the heating unit. [Reference numerals] (10) Compressor; (20) Condenser; (21) First waste heat collector; (40) Evaporator; (50) Second waste heat collector; (60) Heating unit; (AA) Object; (BB) Steam; (CC) Refrigerant; (DD) Water; (EE) Hot water; (FF) Condensed water

Description

Heating system using condensation heat {HITING SYSTEM USING HEAT OF CONDENSATION}

The present invention relates to a heating system using the heat of condensation, and more particularly, using a condensation heat configured to be used as a heat source for heating the object by recovering the latent heat of condensation in the condenser and the condensed sensible heat discarded when discharged from the compressor. Relates to a heating system.

Generally, a refrigeration cycle is composed of a compressor, a condenser, an expansion valve, and an evaporator.

Each function of the refrigeration cycle component is that the refrigerant gas that evaporates in the evaporator and absorbs heat through the evaporator flows into the compressor, and the compressed high-temperature, high-pressure refrigerant gas flows into the condenser, and the refrigerant gas flows into the condenser. It absorbs heat from the condensation medium (water or air) through liquefied high-temperature, high-pressure gas, and the liquefied refrigerant drops from the condenser pressure to the evaporator pressure as it passes through the expansion valve, and the refrigerant evaporates in the evaporator, causing the refrigerant to evaporate. Cool or freeze. This refrigeration cycle process is repeated repeatedly.

The condenser is essential in the refrigeration cycle, and the heat to be removed through the condenser is classified as air-cooled or water-cooled condensation.

However, the heat of condensation from the condenser is usually discharged to the atmosphere without being reused as energy or heat.

Recently, techniques have been developed to recycle waste heat from water-cooled condensers.

However, the technology using the waste heat of the condenser uses the latent condensation heat of the saturated state, and the efficiency of the refrigerant is about 70%, and the conversion efficiency of the hot water exchanged with the refrigerant is about 80%.

That is, there is a problem in that about 30% of the condensed sensible heat contained in the high temperature refrigerant is lost in the air during the discharge from the compressor to the condenser.

Therefore, there is a demand for a technology capable of recovering the latent heat of condensation inside the condenser and the condensation sensitized heat discharged from the compressor.

The present invention has been made in view of the above problems, an object of the present invention is to compress the hot water heat exchanged in the first waste heat recovery unit connected to the condenser so as to recover the latent heat of condensation in the condenser and the condensed sensible heat discharged from the compressor It is to provide a heating system using the condensation heat of the structure that can be supplied to the second waste heat recovery device disposed between and the condenser to increase the thermal energy efficiency.

According to a feature of the present invention for achieving the object as described above, the first invention relates to a heating system using the heat of condensation, consisting of a compressor, condenser, expansion valve, evaporator constitutes a series of closed circuit, the refrigerant In a refrigeration cycle comprising a first waste heat recovery device configured by injecting a heat dissipation tube of the condenser to exchange heat with the latent heat of condensation of the condenser, so as to recover the condensation sensation of the refrigerant discharged from the compressor A second waste heat recovery unit disposed between the condenser and the compressor; and the first waste heat recovery unit and the second waste heat recovery unit so that the hot water of the first waste heat recovery unit is supplied into the second waste heat recovery unit and exchanges heat with condensation sensation. Hot water connection line for connecting; And heating means for receiving the hot water discharged from the second waste heat recovery unit and heating and steaming the first waste heat recovery unit, wherein the first waste heat recovery unit is supplied with a constant water through a water supply line, and the second waste heat recovery unit is connected to hot water. The hot water of the first waste heat recovery machine is supplied through a line and is connected to the heating means through a hot water discharge line.

The second invention, in the first invention, the second waste heat recovery unit is a heat recovery tank connected to the refrigerant pipe in communication with the compressor, the first distribution pipe connected to the refrigerant pipe and disposed inside one side in the heat recovery tank; And a plurality of heat dissipation tubes disposed at regular intervals along the longitudinal direction of the first distribution pipe and arranged in a zigzag form to facilitate heat exchange by increasing the circulation path of the refrigerant, and the heat recovery tanks being connected to each of the heat dissipation tubes. A second distribution pipe disposed at the other inner lower end of the inner space, a partition plate arranged in a layer so as to intersect between the heat dissipation pipes along an inner wall height direction of both sides of the heat recovery tank, and hot water to flow in and out along the partition plate; The hot water inlet and the hot water inlet are disposed at the front lower and rear upper ends of the heat recovery tank so as to face the first distribution pipe and the second distribution pipe. Hot water inlet is connected with the hot water connection line, the hot water outlet is characterized in that the connection and the hot water discharge line.

The third invention, in the first invention, the heating means is characterized in that it further comprises a condensation collection line to be re-supply of the cooled condensed water after heating the object through the steam supply line.

The fourth invention, in the first invention, the refrigerant pipe connected to the compressor and the second waste heat recovery device further includes a bypass refrigerant pipe to directly discharge the high-temperature gas refrigerant discharged from the compressor during the initial operation to the condenser However, when the hot water is discharged through the first waste heat recoverer at the connection point between the refrigerant pipe and the bypass refrigerant pipe, the three-way valve blocks the bypass refrigerant pipe so that the refrigerant is the first waste heat recoverer. It is characterized in that it is configured to be discharged to the condenser via.

According to the heating system using the condensation heat according to the present invention, the hot water heat exchanged in the first waste heat recovery device connected to the condenser so as to recover the latent heat of condensation inside the condenser and the condensed sensible heat discharged from the compressor is disposed between the compressor and the condenser. Supply to the second waste heat recovery device has the effect of increasing the efficiency as a separate heat energy.

In addition, by converting the waste heat of the condenser to heating energy can be used for heating hot water or food sterilization, there is an effect that can save energy.

1 is a configuration diagram of a heating system using heat of condensation according to the present invention;
2 is a block diagram of the first waste heat recovery unit extracted from FIG.
3 is a conceptual diagram illustrating heat exchange between a refrigerant and hot water in a heating system using condensation heat according to the present invention.

Hereinafter, with reference to the accompanying drawings with respect to the heating system using the heat of condensation according to the present invention will be described in detail.

 1 is a block diagram of a heating system using a heat of condensation according to the present invention, Figure 2 is a block diagram of a first waste heat recoverer extracted from FIG.

First, as shown in FIG. 1, the present invention utilizes the latent heat of condensation inside the condenser 20 and the heat of condensation configured to be used as a heat source for heating the object by recovering the condensed sensible heat discharged from the compressor 10. Relates to a heating system.

The present invention is a refrigeration cycle comprising a first waste heat recovery unit 21 is formed by injecting the heat dissipation tube of the condenser 20, the hot water heat exchanged in the first waste heat recovery unit 21 to the compressor 10 and the condenser ( It is configured to increase the thermal energy efficiency by supplying the second waste heat recovery device 50 disposed between the 20.

The present invention is largely composed of four parts, which is composed of a first waste heat recovery unit 21, a second waste heat recovery unit 50, a hot water connection line 561 and a heating means (60).

First, a series of first waste heat recoverers 21 are connected to a constant supply line 211 to receive constant water in real time, and the constant is condensed by heat condensed through a refrigerant pipe embedded in the first waste heat recoverer 21. As it is heat exchanged with, it is converted into hot water and discharged.

Here, the hot water connection line 561 is the first waste heat recovery unit 21 and the second waste heat recovery unit 50 so that the hot water of the first waste heat recovery unit 21 can be supplied into the second waste heat recovery unit 50. It functions to connect.

The second waste heat recovery unit 50 is disposed between the condenser 20 and the compressor 10 to recover the condensed sensible heat of the refrigerant discharged from the compressor 10.

Therefore, the second waste heat recoverer 50 receives the hot water heat exchanged from the first waste heat recoverer 21 through the hot water connection line 561 and heat-exchanges the secondary gas with the high temperature gaseous refrigerant discharged from the compressor 10. It is configured to recover the condensation sensation of.

Meanwhile, the hot water in the second waste heat recovery unit 50 is finally supplied to the heating means 60 through the hot water discharge line 571, and the heating means 60 heats the hot water with a small amount of heat to be in a steam state. It is configured to be able to heat.

Here, the object may be used for various purposes such as heating a boiler or sterilizing food.

Meanwhile, the heating means 60 further includes a condensation collection line 61 to heat the object through the steam supply line 62 and to receive the cooled condensed water again.

At this time, the condensation collection line 61 is connected to the hot water discharge line 571 is configured to be supplied back to the heating means 60, which is configured to reuse and recover the heat source of the condensed water is discarded to be.

On the other hand, the detailed configuration of the second waste heat recovery unit 50 is as shown in FIG.

The second waste heat recoverer 50 includes a heat recovery tank 51, a first distribution pipe 52, a heat dissipation pipe 53, a second distribution pipe 54, a partition plate 55, and a hot water inlet. And a hot water outlet 57.

Here, the heat recovery tank 51 is connected to the refrigerant pipe in communication with the compressor 10 is configured.

In addition, the first distribution pipe 52 is connected to the refrigerant pipe, but is installed at one upper end inside the heat recovery tank 51.

In addition, the heat dissipation pipes 53 are disposed at regular intervals along the longitudinal direction of the first distribution pipe 52 and are arranged in a zigzag form to facilitate heat exchange by increasing the circulation path of the refrigerant. b) to

The second distribution pipe (54) is connected to each of the heat dissipation pipes (53), and has a structure disposed at the other inner lower end of the heat recovery tank (51).

In the above, the first distribution pipe 52, the second distribution pipe 54 and the heat dissipation pipe 53 are connected to each other integrally (shown in Figure 2 (b)) at this time connected to the compressor 10 The refrigerant pipe to be connected is connected to the first distribution pipe 52, and the refrigerant pipe connected to the condenser 20 is connected to the second distribution pipe 54.

The partition plates 55 are arranged in layers so as to intersect between the heat dissipation pipes 53 along the inner wall height direction of both sides of the heat recovery tank 51 (shown in FIG. 2C).

In addition, the hot water inlet (56) for introducing hot water and the hot water outlet (57) for discharging hot water are front lower ends of the heat recovery tank (51) to face the first and second distribution pipes (52) and (54). And a rear upper end. (As shown in Fig. 2A).

Therefore, the high temperature gas refrigerant discharged through the compressor 10 flows in through the first distribution pipe 52 and is discharged through the heat dissipation pipe 53 to the second distribution pipe 54, and conversely, the first waste heat recovery device ( The hot water of 21 is introduced into the hot water inlet 56 of the heat recovery tank 51 through the hot water connection line 561 and circulates with each partition plate 55 to exchange heat with the heat dissipation pipe 53 to provide a hot water outlet 57 The hot water discharge line 571 is connected to the high temperature water is discharged.

Here, the second waste heat recoverer 50 is for recovering only condensed sensible heat without condensing and liquefying the hot gas refrigerant discharged from the compressor 10. Therefore, the gaseous refrigerant having passed through the second waste heat recovery unit 50 is discharged to the condenser 20 in a saturated gas state while only the bleeding temperature is lowered.

In addition, the second waste heat recovery unit 50 is preferably limited to the size for recovering only the condensation sensible heat of the high-temperature gas refrigerant.

Meanwhile, the present invention bypasses the refrigerant pipe connected to the compressor 10 and the second waste heat recovery unit 50 to directly discharge the hot gas refrigerant discharged from the compressor 10 to the condenser 20 during initial operation. The refrigerant pipe 70 further includes a structure.

In addition, a third directional valve 71 is provided at a connection point between the refrigerant pipe P and the bypass refrigerant pipe 70 so that hot water is discharged through the first waste heat recovery machine 21. Block the bypass refrigerant pipe 70 is configured to allow the refrigerant to be discharged to the condenser 20 via the first waste heat recovery unit (21).

Hereinafter, the operation of the heating system using the condensation heat according to the present invention will be briefly described with reference to FIG. 1 and with reference to FIG. 3, and the temperature of the hot water and the refrigerant described will not be limited thereto. Let's explain.

3 is a conceptual diagram illustrating heat exchange between a refrigerant and hot water in a heating system using condensation heat according to the present invention.

First, as shown in FIG. 1, about 110 ° C. of gaseous refrigerant that has passed through the compressor 10 during initial operation is discharged to the condenser 20 along the bypass refrigerant pipe 70. At this time, the three-way valve 71 is a state in which only the bypass refrigerant pipe 70 is opened.

Therefore, the refrigerant discharged to the condenser 20 is introduced into the condenser 20 in a saturated gas state of about 70 ° C. in the state where only the blood pressure is lowered through the bypass refrigerant pipe 70.

The gaseous refrigerant in the state of saturated gas introduced into the condenser 20 is exchanged with the latent heat of condensation due to the change of state as a liquid state through the first waste heat recovery unit 21, and then lowered to 30 ° C. to be converted into a liquid refrigerant to the expansion valve 30. Discharged.

At this time, the first waste heat recovery unit 21 is supplied with a constant of about 20 ℃ through the constant supply line 211, the constant is heat exchanged with the latent heat of condensation of the gas phase refrigerant contained in the saturated gas of about 70 ℃ 60 ℃ It is converted into hot water of a degree and is supplied to the second waste heat recoverer 50 through the hot water connection line 561.

The low temperature refrigerant in the liquid phase is converted into a gas phase refrigerant of about 110 ° C. again through the expansion valve 30, the evaporator 40, and the compressor 10.

Thereafter, the gaseous refrigerant of about 110 ° C. is discharged to the second waste heat recovery unit 50, which is a three-way valve 71 blocking the bypass refrigerant pipe 70, and is connected to the second waste heat recovery unit 50. It is possible by opening the pipe (P). (In the present invention, a temperature sensor for measuring the temperature of the hot water inside the first waste heat recoverer and a control unit for controlling the third directional valve according to the temperature sensor may be provided, which is a general configuration. Will be omitted.

In addition, the gas phase refrigerant of about 110 ° C. supplied to the second waste heat recovery unit 50 exchanges sensible heat temperature lost during initial operation with the hot water of the first waste heat recovery unit 21, thereby exchanging heat with the hot water of about 60 ° C. again. The second waste heat recoverer 50 is heated with hot water of about 70 ℃.

Thereafter, the refrigerant is introduced into the condenser 20 in a saturated gas state of about 70 ° C. in the state where only the bleeding temperature is lowered through the second waste heat recovery unit 50 and circulated through a series of processes.

And the hot water in the second waste heat recovery device 50 of about 70 ℃ is finally supplied to the heating means 60 through the hot water discharge line 571, the heating means 60 heats the hot water with a small amount of heat to steam And to heat the object.

In addition, the heating means 60 receives the condensed water collection line 61 again after cooling the condensed water after heating the object through the steam supply line 62.

At this time, the condensation collection line 61 is connected to the hot water discharge line 571 is configured to be supplied to the heating means 60, which is configured to reuse by recovering the heat source of the condensed water is discarded. .

As described above, the present invention can recover the latent heat of condensation inside the condenser and the condensed sensible heat discharged from the compressor, and can reuse the heat source to heat the object, thereby saving energy.

Although the present invention has been described in connection with the preferred embodiments mentioned above, various other modifications and variations will be possible without departing from the spirit and scope of the invention. It is, therefore, to be understood that the appended claims are intended to cover such modifications and changes as fall within the true scope of the invention.

10: Compressor
20: condenser 21: first waste heat recovery unit 211: water supply line
30: expansion valve
40: evaporator
50: second waste heat recovery machine 51: heat recovery tank 52: first distribution pipe
53: heat dissipation pipe 54: second distribution pipe
55: partition plate 56: hot water inlet
561: hot water connection line
57: hot water outlet 571: hot water discharge line
60: heating means 61: condensation collection line 62: steam supply line
70: bypass refrigerant pipe 71: 3-way valve
P: refrigerant pipe

Claims (4)

Refrigerator comprising a first waste heat recovery device composed of a compressor, a condenser, an expansion valve, and an evaporator to form a series of closed circuits, and a heat dissipation tube of the condenser is inserted to exchange water with hot water condensation to convert water into hot water. In the cycle,
A second waste heat recoverer disposed between the condenser and the compressor to recover the condensed sensible heat of the refrigerant discharged from the compressor;
A hot water connection line connecting the first waste heat recovery unit and the second waste heat recovery unit to supply the hot water of the first waste heat recovery unit to the inside of the second waste heat recovery unit to exchange heat with the condensation sensation heat; And
It comprises a; heating means for receiving the hot water discharged from the second waste heat recovery machine to heat and steam;
The first waste heat recovery unit is supplied with constant water through a constant supply line,
The second waste heat recoverer is supplied with hot water from the first waste heat recoverer through a hot water connection line, and is connected to the heating means through a hot water discharge line.
The method of claim 1,
The second waste heat recovery unit includes a heat recovery tank to which a refrigerant pipe communicating with the compressor is connected, a first distribution pipe connected to the refrigerant pipe and disposed at an upper side inside the heat recovery tank, and a longitudinal direction of the first distribution pipe. According to the present invention, a plurality of heat dissipation tubes arranged at regular intervals and arranged in a zigzag form to facilitate heat exchange by increasing a circulation path of the refrigerant, respectively, and a second portion connected to each of the heat dissipation tubes and disposed at an inner lower end of the heat recovery tank. A partition plate arranged in a layer so as to intersect between each of the heat dissipating pipes along the inner wall height directions of both sides of the heat recovery tank, and the first distribution pipe and the second distribution pipe so that hot water flows in and out along the partition partition plate. Consisting of the hot water inlet and hot water inlet is disposed in the front lower and rear upper end of the heat recovery tank,
The hot water inlet is connected to the hot water connection line, the hot water outlet is a heating system using condensation heat, characterized in that connected to the hot water discharge line.
The method of claim 1,
The heating means is a heating system using a condensation heat characterized in that it further comprises a condensation collection line to be re-supplied after cooling the condensed water after heating the object through the steam supply line.
The method of claim 1,
The refrigerant pipe connected to the compressor and the second waste heat recovery device further includes a bypass refrigerant pipe so as to directly discharge the hot gas refrigerant discharged from the compressor during the initial operation to the condenser.
A third directional valve is provided at the connection point between the refrigerant pipe and the bypass refrigerant pipe. When hot water is discharged through the first waste heat recovery machine, the three-way valve blocks the bypass refrigerant pipe so that the refrigerant passes through the first waste heat recovery device. Heating system using a heat of condensation, characterized in that configured to be discharged to the condenser.

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