KR101921062B1 - Heat pump system using unused heat source - Google Patents

Abstract

The present invention relates to a heat pump system of utilizing a refrigerant subcooling technology by using a non-utilized heat source in a building. In other words, the present invention provides a heat pump system which is not only easily produced by doubly heating high-temperature water (heating water) filled in an upper space of a temperature stratification type of a hot water tank using at least two heat exchangers, but may uniformly adjust a filling amount and the temperature of the heating water, which is filled in the upper space of the temperature stratification type of a hot water tank. In particular, when the temperature of low-temperature water (feeding water) filled in a lower space of the temperature stratification type of a hot water tank is increased to a specific temperature or more, a refrigerant (a high-temperature refrigerant obtained through a de-superheater after discharged from a compressor) is not heat-exchanged with low temperature water (low temperature water increased to a specific temperature or more), but bypassed in a forward direction such that the circulation of the refrigerant is smoothly performed. Accordingly, the working efficiency of the heat pump system is improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat pump system using a refrigerant supercooling technology using an un-

The present invention relates to a heat pump system utilizing a refrigerant supercooling technique using an inexpensive refrigerant in a building. More particularly, the present invention relates to a heat pump system in which water supplied into a temperature stratification hot water tank can be easily heated by hot water using two or more heat exchangers, The present invention relates to a heat pump system utilizing a refrigerant supercooling technique using an inexpensive heat source in a building, in which a supercooling degree of a refrigerant as a water supply heat source for heating hot water and a circulation flow of a refrigerant can be smoothly performed.

Generally, a heat pump system performs heat exchange between a refrigerant circulating in a compressor, a condenser, an evaporator, an expansion valve, and the like with a fluid (gas, liquid, etc.) to heat and cool the refrigerant, And the like) through the heat exchange function with the heat exchange function.

In such a heat pump system, a de-superheater (hot water heat exchanger) is included to supply hot water (hot water).

In view of the cooling operation principle of the heat pump system, the liquid refrigerant passing through the evaporator takes heat from the room air and evaporates. At the same time, the room air that has lost the heat is cooled and circulated to a place requiring cooling, .

In view of the heating operation principle of the heat pump system, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the heat exchanger and performs heat exchange with the indoor air, thereby heating the room.

In addition, in view of the principle of hot-water supply operation of the heat pump system, when the high-temperature refrigerant passing through the compressor passes through the di-super heater and simultaneously the low-temperature water passes through the di- By performing the heat exchange, the hot water supply function in which the low temperature water is heated by the hot water is performed.

The applicant of the present application filed a patent application for the preheating and supercooling heat pump system using the temperature stratification type hot water tank which enables the preheating of the hot water using the excess energy of the heat medium (refrigerant) Patent Application No. 10-2017-0155883).

However, there is a disadvantage in that the filling amount and the temperature of the hot water (hot water) filled in the upper space of the temperature stratification type hot water tank are not kept constant. Particularly, the low temperature water The refrigerant (the refrigerant discharged from the compressor and passed through the di-heater) is not supercooled by the heat exchange with the supply water (the low-temperature water whose temperature rises above a predetermined temperature).

As a result, the filling amount and the temperature of the hot water filled in the temperature stratification type hot water tank are not constantly controlled, and the circulation of the refrigerant is not smooth, resulting in a disadvantage that the operating efficiency of the heat pump system is deteriorated.

Korean Patent Application No. 10-2017-0155883 (Nov. 21, 2017)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a hot-water tank for hot- , The filling amount and the temperature of the hot water filled in the upper space of the temperature stratification type hot water tank can be controlled to be constant. Particularly, when the low temperature water (water supply) The refrigerant discharged from the compressor and passing through the disturbing heater) is bypassed in the circulation direction without heat exchange with the low-temperature water (low-temperature water whose temperature rises above a predetermined temperature) so that the refrigerant circulates smoothly, In order to improve the operating efficiency of the system, a heat pump system utilizing refrigerant supercooling technology using a non-use heat source in a building It is an object to the ball.

In order to achieve the above object, the present invention provides a hot-water storage tank comprising: a temperature stratified hot water tank in which hot water is filled in an upper space above the low temperature water in a lower space filled with low temperature water and high temperature water and low temperature water exist; Temperature water discharge line extending from the lower space of the temperature stratification type hot water tank is connected to the inlet of the hot water discharge line, and a hot water supply line is connected to the outlet of the hot water discharge line to heat the low temperature water from the low temperature water discharge line with the refrigerant in the refrigerant path A first heat exchanger for heating by a car; The inlet is connected to the outlet of the first heat exchanger through a heating water supply line, the outlet is connected to the upper space of the temperature stratification type hot water tank through a hot water supply line, A second heat exchanger which heats the heated heated water through the heat exchange with the hot water heating medium and discharges it to the hot water supply line; A di-super heater connected to the second heat exchanger through a first hot water heating medium circulation line to circulate the hot water heating medium for heating the first heated hot water to the second heat exchanger; A compressor for supplying a high temperature refrigerant for heat exchange with the hot water heating medium to the di supermarket heater; A first refrigerant circulation line connected between the refrigerant outlet of the compressor and the refrigerant inlet of the di supermarket heater to supply the high temperature refrigerant from the compressor for heat exchange with the hot water storage medium to the di supermarket heater; A four-way valve including a first inlet connected to a refrigerant outlet of the di-heater through a second refrigerant circulation line; A third heat exchanger connected to the first outlet of the four sides through a third refrigerant circulation line; A fourth refrigerant circulation line connected between the refrigerant path of the third heat exchanger and the refrigerant path of the first heat exchanger; A fourth refrigerant circulation line, a sixth refrigerant circulation line, and a sixth refrigerant circulation line, wherein the second refrigerant circulation line is connected to the refrigerant path of the first heat exchanger through a fifth refrigerant circulation line, A load heat exchanger connected via a line; And a seventh refrigerant circulation line connected between the four sides and the inlet of the compressor; The present invention provides a heat pump system utilizing a refrigerant supercooling technique using an inactive heat source in a building.

Preferably, the high temperature water supply line connected between the second heat exchanger and the upper space of the temperature stratification type hot water tank is equipped with a flow rate control valve and a temperature sensor, and according to the temperature of the high temperature water sensed by the temperature sensor, And the degree of opening / closing of the flow rate control valve is controlled.

The underground heat source circulation line is connected to the third heat exchanger for the supercooling of the refrigerant, and an underground heating medium opening / closing valve is installed at the inlet side of the underground heat source circulation line. The opening / closing of the underground heating medium opening / And the controller is controlled in accordance with the temperature of the hot water sensed by the mounted temperature sensor.

In particular, a bypass line that is out of the refrigerant path of the first heat exchanger is connected between the fourth refrigerant circulation line and the fifth refrigerant circulation line.

The bypass line is provided with a first refrigerant opening / closing valve, a fourth refrigerant circulation line connected to the refrigerant path of the first heat exchanger through the bypass line, and a second refrigerant opening / closing valve. And a check valve is mounted on the fifth refrigerant circulation line connected to the refrigerant path of the second refrigerant circulation line.

Preferably, the first heat exchanger is further connected to an auxiliary water supply tank for circulating and supplying cooling water for supercooling refrigerant, and the de-superheater and the load heat exchanger are connected to the first hot water heating medium circulation line And a cooling tower for the cooling tower.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

First, the high temperature water (hot water) filled in the upper space of the temperature stratification type hot water tank can be easily produced by double heating using two or more heat exchangers.

Second, as the temperature of the low-temperature water (water supply) filled in the lower space of the temperature stratification type hot water tank becomes equal to or higher than a certain temperature and passes through the first heat exchanger, the refrigerant (A refrigerant in a high-temperature state, which is discharged from the compressor and passed through the di-heater), to the first heat exchanger By bypassing the refrigerant in the circulation direction through the bypass line deviating from the refrigerant cycle, the circulation of the refrigerant can be smoothly performed.

Thirdly, when the first heat exchanger fails, the refrigerant (the refrigerant discharged from the compressor and passed through the di-heater) can be easily supercooled by using the cooling fluid supplied from the underground heat source and the auxiliary water supply tank.

Fourth, when the hot water temperature to be filled in the stratified charge hot water tank is higher than a certain level, the opening and closing control of the flow rate control valve can control the filling amount and temperature of the hot water to a certain level.

FIG. 1 is a system diagram showing a heat pump heating and cooling operation state using a refrigerant supercooling technique using an unutilized heat source in a building according to the present invention,
FIG. 2 is a system diagram showing an example of controlling a heating amount of a hot water supply in a hot water heating and cooling operation in a heat pump system utilizing a refrigerant supercooling technique using an unutilized heat source in a building according to the present invention,
FIG. 3 is a schematic view showing a principle in which the refrigerant is bypassed to the bypass line without passing through the first heat exchanger in the hot water heating and cooling operation states of FIG. 2;
FIG. 4 is a system diagram showing a heat pump heating and heating operation state using a refrigerant supercooling technique using an unutilized heat source in a building according to the present invention,
FIG. 5 is a system diagram showing a heat pump system utilizing a refrigerant supercooling technique using an un-used heat source in a building according to the present invention, further connecting an auxiliary water tank and a cooling tower for supercooling the refrigerant and the hot water heating medium.

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

1 and 3 show a heat pump system utilizing a refrigerant supercooling technique using an unutilized heat source in a building according to the present invention, and reference numeral 40 indicates a temperature stratified hot water tank.

Temperature water tank 40 has one internal space. However, when the lower space is filled with the low-temperature water, the upper space above the low-temperature water is filled with the high-temperature water so that the hot space is present in the upper space, And the high-temperature water and the low-temperature water are bounded to each other.

A low temperature water discharge line 41 is connected to the lower space of the temperature stratification type hot water tank 40 and the distal end of the low temperature water discharge line 41 is connected to the first heat exchanger 10.

The first heat exchanger (10) performs heat exchange for firstly heating low-temperature water incoming from the low-temperature water discharge line (41) for supplying hot water for hot water supply.

To this end, a low-temperature water discharge line 41 is connected to the inlet of the first heat exchanger 10, and a heating water supply line 11 through which the hot water heated by the low-temperature water is discharged is connected to the outlet.

At this time, the refrigerant (refrigerant of a high temperature state, which is discharged from the compressor and passes through the di-heater) passes through the refrigerant path 12 of the first heat exchanger 10.

The low temperature water from the low temperature water discharge line 41 in the first heat exchanger 10 is heat-exchanged with the refrigerant flowing in the refrigerant path 12, whereby the low temperature water is first heated, The water flows to the second heat exchanger 20 along the heated water supply line 11. [

The second heat exchanger (20) serves to further heat the firstarily heated water to generate hot water for hot water supply.

A heating water supply line 11 is connected to the inlet of the second heat exchanger 20 and a high temperature water supply line 21 is connected to the outlet of the second heat exchanger 20. The distal end of the high temperature water supply line 21 And is connected to the upper space of the temperature stratification type hot water tank 40.

A hot water heating medium for secondarily heating the hot water heated by the hot water for hot water is circulated in the refrigerant path of the second heat exchanger (12). The hot water heating medium is supplied from the dehydrator .

The heating water supplied to the second heat exchanger 20 along the heating water supply line 11 is secondarily heated while exchanging heat with the hot water heating medium circulating through the second heat exchanger 12, The generated hot water for hot water supply is filled into the upper space of the temperature stratified hot water tank 40 along the hot water supply line 21.

The diSuperheater 50 is connected to the second heat exchanger 20 via the first hot water heating medium circulation line 51 to heat the hot water heating medium for heating the first heated hot water to the second heat exchanger (20).

At this time, a refrigerant for heating the hot water heating medium is circulated and supplied to the de-superheater 50.

To this end, the de-superheater 50 is connected to a compressor 60 for supplying high-temperature refrigerant for heat exchange with the hot water heating medium.

More specifically, the refrigerant outlet port 61 of the compressor 60 and the refrigerant inlet port of the de-superheater 50 are connected by a first refrigerant circulation line 91 to a compressor (not shown) for heat exchange with the hot water heating medium 60 is circulated and supplied to the de-superheater 50 along the first refrigerant circulation line 91. The high-

The high-temperature refrigerant supplied from the compressor (60) to the de-superheater (50) via the first refrigerant circulation line (91) undergoes heat exchange with the hot water heating medium, and the hot water heating medium, Is circulated to the second heat exchanger (20) along the hot water heating medium circulation line (51), whereby the first heated hot water is heat-exchanged with the hot water heating medium to generate secondarily heated hot water for hot water supply, And is filled into the upper space of the temperature stratification type hot water tank 40.

On the other hand, the refrigerant compressed from the compressor (60) and discharged in a high temperature and high pressure state is supplied to the refrigerant path of the diSuper heater (50), and then flows to the four sides (70).

The four sides 70 are provided for guiding the flow direction of the refrigerant. The four sides 70 are provided with four inlet / outlet ports. The first inlet 71 of the four sides 70 is connected to the To a second refrigerant circulation line (92) extending from the refrigerant path outlet.

A third refrigerant circulation line 93 for discharging the refrigerant introduced into the first inlet 71 is connected to the first outlet 72 of the four sides 70. The third refrigerant circulation line 93, Is connected to the third heat exchanger (30).

The third heat exchanger 30 is operated to supercool the refrigerant in the high temperature state coming from the third refrigerant circulation line 93 at a normal temperature (an operation of filling the temperature stratified hot water tank smoothly in a proper amount while maintaining the high temperature water reference temperature) (An operation in which the high temperature water is filled with an excessive amount of the high temperature water in the temperature stratification type hot water tank at a temperature higher than the reference temperature) as described later, the high temperature water entering from the third refrigerant circulation line 93 The supercooling is performed using the underground heat source.

At this time, the refrigerant path 32 of the third heat exchanger 30 and the refrigerant path 12 of the first heat exchanger 10 are connected by the fourth refrigerant circulation line 94.

When the high-temperature refrigerant having passed through the third heat exchanger 30 flows into the refrigerant path 12 of the first heat exchanger 10 along the fourth refrigerant circulation line 94, the high- As a result of the heat exchange with the low temperature water flowing from the temperature stratification type hot water tank 40 to the first heat exchanger 10 via the low temperature water discharge line 41, the low temperature water is first heated as described above, The heated water that has been heated primarily flows to the second heat exchanger 20 along the heated water supply line 11. [

The refrigerant path 12 of the first heat exchanger 10 is connected to the load heat exchanger 80 via a fifth refrigerant circulation line 95.

The load heat exchanger 80 is a heat exchanger for cooling and heating and is connected to the second superheater 50 through the second hot water heating medium circulation line 81 with the load 82 interposed therebetween.

The refrigerant path of the load heat processing pipeline 80 is connected through the four sides 70 and the sixth refrigerant circulation line 96. Between the four sides 70 and the inlet of the compressor 60, And the refrigerant circulation line 97 is connected.

Therefore, the refrigerant having undergone the heat exchange in the first heat exchanger 10 passes through the fifth refrigerant circulation line 95, the refrigerant path of the load heat exchanger 80, the sixth refrigerant circulation line 96, 70 and the seventh refrigerant circulation line 97, and then enters the compressor 60 again.

A flow rate control valve 22 and a temperature sensor 23 are further installed in the hot water supply line 21 connected between the second heat exchanger 20 and the upper space of the temperature stratified hot water tank 40 .

By controlling the opening and closing degree of the flow control valve 22 in the controller in accordance with the temperature of the high temperature water sensed by the temperature sensor 23, the temperature of the high temperature water filled in the upper space of the temperature stratification type hot water tank 40 And the filling amount can be adjusted to a certain level (reference range).

An underground heat source circulation line 33 for supercooling refrigerant is connected to the third heat exchanger 30 and an underground heating medium open / close valve 34 is mounted at an inlet side of the underground heat source circulation line 33.

The high temperature refrigerant passing through the first heat exchanger 10 flows from the temperature stratification type hot water tank 40 via the low temperature water discharge line 41 to the low temperature water flowing into the first heat exchanger 10 When the supercooling angle is not smooth as much as desired due to the over-filling of the hot-water supply hot water with respect to the hot-water tank, the temperature of the low-temperature water is raised to the reference temperature or more) And the underground heat source for the supercooling is circulated to the third heat exchanger (30) through the underground heat source circulation line (33), so that the high temperature refrigerant before passing through the first heat exchanger (10) can be easily exchanged with the underground heat source .

On the other hand, when the high-temperature refrigerant passing through the first heat exchanger 10 is excessively charged into the low-temperature water flowing into the first heat exchanger 10 (the temperature of the low- A part of the refrigerant flowing in the refrigerant path of the first heat exchanger 10 does not circulate in the proceeding direction, and a phenomenon occurs that the refrigerant stagnates.

When a part of the refrigerant stays in a specific section, the total circulating refrigerant amount becomes insufficient. As a result, the cooling and heating efficiency and the hot water generation efficiency of the heat pump system may be lowered due to the refrigerant deficiency.

A bypass line 98 out of the refrigerant path 12 of the first heat exchanger 10 is connected between the fourth refrigerant circulation line 94 and the fifth refrigerant circulation line 95, do.

The bypass line 98 is connected to the refrigerant path 12 of the first heat exchanger 10 through the bypass line 98 and the first refrigerant opening and closing valve 98-1. The fifth refrigerant circulation line 95 connected to the refrigerant path 12 of the first heat exchanger 10 is provided with a check valve 95 -1).

Therefore, when the high-temperature refrigerant passing through the first heat exchanger 10 is excessively charged into the low-temperature water flowing into the first heat exchanger 10 (the temperature of the low-temperature water exceeds the reference temperature , The second refrigerant opening / closing valve 94-1 is controlled to be closed and the first refrigerant opening / closing valve 98-1 is controlled to be opened (Not shown) to the refrigerant path of the first heat exchanger 10 without passing through the refrigerant path of the first heat exchanger 10 after passing through the bypass line 98, To the refrigerant circulation line (95).

Furthermore, when the refrigerant is bypassed through the bypass line 98, some of the refrigerant already stored in the first heat exchanger 10 by the flow force (a kind of jet pump principle) To be sucked into the fifth refrigerant circulation line 95 and merged with the bypassed refrigerant, it is possible to prevent the cooling / heating efficiency and the hot water generation efficiency of the heat pump system from being lowered due to the refrigerant deficiency.

Hereinafter, the operation of the heat pump system according to the present invention will be described.

Hot water heating and cooling operation

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a heat pump system utilizing a refrigerant supercooling technique using an unutilized heat source in a building according to the present invention, and shows a state of hot water heating and cooling operation.

Hot water having a hot water temperature of about 55 캜 is filled in the upper space of the temperature stratification type hot water tank 40 and a state in which the low temperature water having a water supply temperature of about 15 캜 is kept is maintained in the lower space.

First, low-temperature water is supplied to the first heat exchanger 10 through a low-temperature water discharge line 41 connected to the lower space of the temperature stratification type hot water tank 40.

At this time, the high-temperature refrigerant which has entered the diSuperheater 50 via the first refrigerant circulation line 91 from the compressor 60 undergoes heat exchange with the hot water heating medium and then flows through the second refrigerant circulation line 92, The refrigerant enters the first inlet 71 of the side 70 and the refrigerant again passes through the first outlet 72 of the four sides 70, Passes through the circulation line 93 and the third heat exchanger 30 and then flows to the refrigerant path 12 of the first heat exchanger 10 via the fourth refrigerant circulation line 94. [

In the refrigerant path 12 of the first heat exchanger 10, refrigerant (refrigerant discharged from the compressor and passing through the di-heater) flows through the low-temperature water discharge line 41, The low temperature water is firstly heated and the heated water which is heated first flows to the second heat exchanger 20 along the heating water supply line 11. [

At the same time, the refrigerant (refrigerant discharged from the compressor and passing through the di-heater) flowing through the refrigerant path 12 of the first heat exchanger 10 is easily supercooled due to heat exchange with the low-temperature water.

The supercooled refrigerant is supplied to the load heat exchanger 80 along the fifth refrigerant circulation line 95 and then the supercooled coolant is circulated from the load heat exchanger 80 along the second hot water heating medium circulation line 81 (Cooling fluid) for cooling the load 82 by performing heat exchange with the second hot water heating medium (cooling fluid).

At this time, the heating water firstly heated in the first heat exchanger 10 flows to the second heat exchanger 20 along the heating water supply line 11, and the second heat exchanger 20 is heated And the second heated water is further heated to generate hot water for hot water supply.

More specifically, after the refrigerant is compressed in the compressor (60) and passed through the first refrigerant circulation line (91), the high temperature refrigerant supplied to the di supther heater (50) performs heat exchange with the hot water heating medium And the hot water heating medium which has been heated continuously is circulated to the second heat exchanger 20 along the first hot water heating medium circulation line 51 so that the first heated hot water exchanges heat with the hot water heating medium, .

The generated hot water for hot water supply is filled into the upper space of the temperature stratification type hot water tank 40 along the hot water supply line 21.

On the other hand, when the filling amount and the temperature of the hot water for hot water filling in the temperature-stratified-type hot water tank 40 become the reference range or more, as shown in FIG. 2, The supply water temperature of the filled low temperature water can be raised from about 15 ° C to about 35 ° C, and when the low temperature water having the increased supply water temperature is supplied to the first heat exchanger 10, the supercooling degree of the refrigerant smoothly And the filling amount and the temperature of the hot water for hot water supply continue to increase beyond the reference range.

In order to solve this problem, the temperature sensor 23 installed in the hot water supply line 21 senses the temperature of the hot water filled in the hot water tank 40, It is possible to control the amount of filling of the high temperature water filled in the upper space of the temperature stratification type hot water tank 40 to be decreased and by reducing the high temperature water filling amount, The temperature of the low temperature water layer below the high temperature water in the hot water tank 40 can be gradually regulated below the reference temperature.

At the same time, the low-temperature water flowing into the first heat exchanger 10 via the low-temperature water discharge line 41 (the temperature of the low-temperature water rises above the reference temperature due to excessive filling of the hot- In order to solve the problem that the supercooling degree of the refrigerant flowing through the refrigerant path (12) of the first heat exchanger (10) is not smooth due to the high temperature refrigerant flowing through the first heat exchanger It can be supercooled through heat exchange with the underground heat source.

To this end, the temperature sensor 23 installed in the hot water supply line 21 senses the temperature of the hot water filled in the hot-water tank 40, and if the temperature is higher than the reference temperature, The underground heat medium opening / closing valve 34 is controlled to be opened so that the underground heat source for the supercooling is circulated to the third heat exchanger 30 through the underground heat source circulation line 33, thereby passing through the first heat exchanger 10 The high-temperature refrigerant before being able to be easily supercooled by the heat exchange with the underground heat source, and the supercooled refrigerant can be supplied to the load heat exchanger for cooling.

As described above, when the hot water is abnormally filled (the operation of filling the hot water in the temperature stratified charge tank with the excessive amount of the hot water at the reference temperature or more), the underground heat source is used for the refrigerant in the high temperature state coming from the third refrigerant circulation line 93 So that it can be easily supercooled.

On the other hand, when the high-temperature refrigerant passing through the first heat exchanger 10 is excessively charged into the low-temperature water flowing into the first heat exchanger 10 (the temperature of the low- A part of the refrigerant flowing in the refrigerant path of the first heat exchanger 10 does not circulate in the proceeding direction, and a phenomenon occurs that the refrigerant stagnates.

3, since the refrigerant pressure passing through the third heat exchanger 30 is lower than the refrigerant pressure passing through the first heat exchanger 10, the refrigerant pressure in the third heat exchanger 30 Not only the flow of the refrigerant to the first heat exchanger 10 becomes smooth but also a phenomenon occurs in which a part of the refrigerant flowing in the refrigerant path of the first heat exchanger 10 does not circulate in the traveling direction.

When a part of the refrigerant stays in a specific section, the total circulating refrigerant amount becomes insufficient. As a result, the cooling and heating efficiency and the hot water generation efficiency of the heat pump system may be lowered due to the refrigerant deficiency.

In order to overcome such a problem, the high-temperature refrigerant passing through the first heat exchanger 10 is supplied to the first heat exchanger 10 through the low-temperature water The second refrigerant opening / closing valve 94-1 is controlled to be closed as shown in FIG. 3, and at the same time, It is possible to control the opening and closing valve 98-1 to be opened so that the refrigerant does not pass through the refrigerant path of the first heat exchanger 10 (refrigerant that has been overcooled by the underground heat source while passing through the third heat exchanger 30) And flows directly to the fifth refrigerant circulation line (95) through the bypass line (98).

Furthermore, when the refrigerant is bypassed through the bypass line 98, some of the refrigerant already stored in the first heat exchanger 10 by the flow force (a kind of jet pump principle) To be sucked into the fifth refrigerant circulation line 95 and merged with the bypassed refrigerant, it is possible to prevent the cooling / heating efficiency and the hot water generation efficiency of the heat pump system from being lowered due to the refrigerant deficiency.

Hot water heating and heating operation

FIG. 4 is a heat pump system utilizing a refrigerant supercooling technique using an inactive heat source in a building, and shows a state of hot water heating and heating operation.

The hot water heating and heating operation is performed in the same manner as the operation for filling hot water for hot water supply into the temperature stratification type hot water tank 40 as compared with the hot water heating and cooling operation described above, There is only difference in operation.

That is, the high-temperature refrigerant supplied from the compressor (60) to the di-heater (50) via the first refrigerant circulation line (91) circulates through the second hot water storage medium circulation line (81) Fluid), the heating of the load 82 is performed.

Refrigerant Supercooling  Another for configuration Example

FIG. 5 is a heat pump system utilizing a refrigerant supercooling technique using a non-use heat source in a building, and shows an auxiliary water supply tank and a cooling tower for supercooling the refrigerant and the hot water heating medium.

5, an auxiliary water supply tank 35 for circulating and supplying cooling water for supercooling the refrigerant is further connected to the first heat exchanger 10, and the dehydrator 50 and the load heat exchanger 80 is further connected to a cooling tower 36 for cooling the hot water heating medium circulating through the first hot water heating medium circulation line 51.

As described above, when the high-temperature refrigerant passing through the first heat exchanger 10 is supplied to the low-temperature water flowing into the first heat exchanger 10 (the over- A state in which a part of the refrigerant flowing in the refrigerant path of the first heat exchanger 10 does not circulate in the traveling direction is caused to occur .

In order to solve this problem, in the embodiment of the present invention, the supercooling of the refrigerant is performed using the underground heat source connected to the third heat exchanger (30), but the cooling water for supercooling the refrigerant in the first heat exchanger The auxiliary water supply tank 35 may be connected to the water supply tank.

Therefore, when the high temperature refrigerant passing through the first heat exchanger 10 is excessively filled with the low temperature water flowing into the first heat exchanger 10 (the temperature of the low temperature water is increased to the reference temperature The low temperature water not more than the reference temperature is circulated and supplied to the first heat exchanger 10 from the auxiliary water supply tank 35 so that the first heat exchanger 10 10 can be easily supercooled by the low-temperature water from the auxiliary water supply tank 35. [0053]

Also, a supercooling degree for the hot water heating medium can be easily performed by circulating the hot water heating medium, which performs heat exchange with the high temperature refrigerant supplied from the compressor 60 to the dehydrator 50, to the cooling tower at the time of no-

As described above, the hot water (hot water) filled in the upper space of the temperature stratification type hot water tank 40 can be easily produced by double heating using the first and second heat exchangers 10 and 20 Temperature hot water having an appropriate amount and temperature at all times can be filled in the hot-water tank 40, and the supercooling of the refrigerant for hot water supply and heating and cooling and the circulation flow thereof can be performed smoothly, Can be greatly improved.

On the other hand, the flow rate control valve 22 is made of a metal material, and the metal flow rate control valve 22 can be coated with a corrosion-resistant coating layer to prevent corrosion of the metal surface.

The anti-corrosion coating layer is composed of 20% by weight of tolithriazole, 15% by weight of benzimidazole, 10% by weight of trioctylamine, 15% by weight of hafnium and 40% by weight of aluminum oxide.

Toluetriazole, benzimizazole, and trioctylamine serve to prevent corrosion and prevent discoloration.

Hafnium is a corrosion-resistant transition metal element that plays a role in providing excellent waterproofness and corrosion resistance.

 Aluminum oxide is added for the purpose of refractoriness and chemical stability.

The reason why the ratio of the constituent components and the thickness of the coating are limited as described above is that the present inventor has analyzed through several test results, and as a result, showed the optimum corrosion inhibiting effect at the above ratios.

In addition, an anti-fouling coating layer made of a composition for anti-fouling coating can be applied to the inner surface of the temperature-stratified hot-water tank 40 so as to effectively prevent and remove the adhesion of the fouling substance.

The anti-contamination coating composition contains alkanolamide and amphopropionate in a molar ratio of 1: 0.01 to 1: 2, and the total content of alkanolamide and amphopropionate is 1 to 10 Weight%.

The molar ratio of alkanolamide and amphopropionate is preferably in the range of 1: 0.01 to 1: 2. When the molar ratio is out of the range, the coating property of the base material is lowered or the moisture adsorption on the surface is increased, There is a problem to be removed.

The alkanolamide and amphopropionate are preferably used in an amount of 1 to 10% by weight in the aqueous solution of the total composition. When the amount is less than 1% by weight, the applicability of the base material is deteriorated. When the amount is more than 10% by weight, So that crystal precipitation is likely to occur.

On the other hand, as a method of applying the present anti-fouling coating composition onto a substrate, it is preferable to coat it by a spray method. The thickness of the final coated film on the substrate is preferably 500 to 2000 angstroms, more preferably 1000 to 2000 angstroms. When the thickness of the coating film is less than 500 ANGSTROM, there is a problem that it deteriorates in the case of a high-temperature heat treatment. When the thickness is more than 2000 ANGSTROM, crystallization of a coated surface tends to occur.

The anti-contamination coating composition may be prepared by adding 0.1 mol of alkanolamide and 0.05 mol of amphopropionate to 1000 mL of distilled water, followed by stirring.

A malfunction prevention layer including a silicon component may be applied to the temperature sensor 23 in order to solve the problem of surface contamination which causes the temperature sensor 23 to come out and shorten its service life.

This malfunction prevention layer prevents the attachment of microorganisms, floating matters, and the like, thereby preventing the outflow, and allowing the service period of the temperature sensor 23 to be semi-permanently extended. A brief description will be given of a method for preparing the coating liquid. First, dimethyldichlorosilane solution is dissolved in ethyl acetate at a volume ratio of 2-5% to prepare a coating liquid. At this time, if the content of the dimethyldichlorosilane solution is less than 2%, the coating effect can not be sufficiently obtained. If the content exceeds 5%, the surface protective coating layer becomes too thick and the efficiency becomes poor. It is preferable that the viscosity of the solution is in the range of 0.8-2 cp (centipoise) in consideration of the application time and the coating thickness. This is because if the viscosity is too low, the application time must be long. If the viscosity is too high, the application may become thick and dry, and non-uniform application may cause the sensor to come out. In the present invention, The surface of the temperature sensor 23 is coated with a solution to a thickness of 1 m or less. At this time, if the thickness of the surface protective coating layer exceeds 1 탆, the sensitivity of the sensor is lowered. Therefore, in the present invention, the thickness of the surface protective coating layer is limited to 1 탆 or less. In addition, as a method of applying the thickness as described above, a spraying method of spraying the surface of the temperature sensor 23 about 2-3 times may be used.

10: first heat exchanger 11: heated water supply line
12: refrigerant path 20: second heat exchanger
21: hot water supply line 22: flow control valve
23: temperature sensor 30: third heat exchanger
32: refrigerant path 33: underground heat source circulation line
34: Underground heating medium opening / closing valve 35: auxiliary water tank
36: cooling tower 40: temperature stratified water tank
41: low temperature water discharge line 50: di super heater
51: First hot water heating medium circulation line 60: Compressor
61: refrigerant outlet 70: all sides
71: first inlet 72: first outlet
80: load heat exchanger 81: second hot water heating medium circulation line
82: load 91: first refrigerant circulation line
92: second refrigerant circulation line 93: third refrigerant circulation line
94: fourth refrigerant circulation line 94-1: second refrigerant opening and closing valve
95: fifth refrigerant circulation line 95-1: check valve
96: sixth refrigerant circulation line 97: seventh refrigerant circulation line
98: bypass line 98-1: first refrigerant opening / closing valve

Claims (5)

Layered hot water tank 40 in which hot water is filled in the upper space above the low temperature water while the lower space is filled with low temperature water and high temperature water and low temperature water remain and the low temperature water discharge line 41 is connected to the lower space, ;
Temperature water discharge line 41 extending from the lower space of the temperature stratified-type hot water tank 40 is connected to the inlet of the hot-water supply line 41, the hot water supply line 11 is connected to the outlet, A first heat exchanger (10) for firstly heating the low temperature water by performing heat exchange with the high temperature refrigerant flowing through the refrigerant path (12);
The inlet is connected to the outlet of the first heat exchanger 10 via the heating water supply line 11 and the outlet is connected to the upper space of the temperature stratification type hot water tank 40 via the hot water supply line 21, A second heat exchanger (20) connected to the first heat exchanger (10) to heat the firstarily heated water through a heat exchange with the hot water heating medium and secondarily heat the heated water to the hot water supply line (21);
And a second heat exchanger (20) which is connected to the second heat exchanger (20) through a first hot water heating medium circulation line (51) and circulates the hot water heating medium for heating the first heated hot water to the second heat exchanger A superheater 50;
A compressor (60) for supplying a high-temperature refrigerant for heat exchange with the hot water heating medium to the de-superheater (50);
The high-temperature refrigerant from the compressor (60) for heat exchange with the hot water heating medium is supplied to the de-superheater (50), which is connected between the refrigerant outlet (61) of the compressor (60) and the refrigerant inlet of the di- A first refrigerant circulation line 91;
(70) including a first inlet (71) connected to a refrigerant outlet of the diSuperheater (50) through a second refrigerant circulation line (92);
A third heat exchanger (30) connected through a first outlet (72) of the four sides (70) and a third refrigerant circulation line (93);
A fourth refrigerant circulation line 94 connected between the refrigerant path 32 of the third heat exchanger 30 and the refrigerant path 12 of the first heat exchanger 10;
The refrigerant is connected to the refrigerant path 12 of the first heat exchanger 10 through the fifth refrigerant circulation line 95 and the fourth refrigerant circulation line 96, A load heat exchanger (80) connected via the second hot water heating medium circulation line (81) with the di supermarket heater (50) and the load (82) interposed therebetween; And
And a seventh refrigerant circulation line (97) connected between the four sides (70) and the inlet of the compressor (60);
The low temperature water from the low temperature water discharge line 41 is subjected to heat exchange with the refrigerant flowing through the refrigerant path 12 in the first heat exchanger 10 so that the low temperature water is first heated, Flows into the second heat exchanger (20) along the water supply line (11);
The heating water supplied to the second heat exchanger 20 along the heating water supply line 11 is secondarily heated while exchanging heat with the hot water heating medium circulating through the second heat exchanger 12, And the produced hot water for hot water supply is filled into the upper space of the temperature stratified hot water tank 40 along the hot water supply line 21;
The refrigerant after the heat exchange in the first heat exchanger 10 flows through the fifth refrigerant circulation line 95, the refrigerant path of the load heat exchanger 80, the sixth refrigerant circulation line 96, the four sides 70, , The seventh refrigerant circulation line (97), and then enters the compressor (60) again;
The high temperature refrigerant supplied from the compressor 60 to the dehydrator 50 via the first refrigerant circulation line 91 is heat-exchanged with the hot water heating medium, and the hot water heating medium, Is circulated to the second heat exchanger (20) along the circulation line (51), whereby the first heated hot water is heat-exchanged with the hot water heating medium to generate secondarily heated hot water for hot water supply, Filled in the upper space of the stratified charge water tank 40;
The third heat exchanger 30 does not perform the heat exchange function for the supercooling of the high temperature refrigerant coming from the third refrigerant circulation line 93 and the third refrigerant circulation line 93 when the high temperature water abnormality is filled, The subcooling is performed using a subterranean heat source for the refrigerant at a high temperature entering from the subcooler;
When the high-temperature refrigerant that has passed through the third heat exchanger 30 flows along the fourth refrigerant circulation line 94 to the refrigerant path 12 of the first heat exchanger 10, the high- The low temperature water is firstly heated by the heat exchange with the low temperature water flowing from the hot water tank 40 via the low temperature water discharge line 41 to the first heat exchanger 10, Flows into the second heat exchanger (20) along the water supply line (11);
A flow rate control valve 22 and a temperature sensor 23 are mounted on the high temperature water supply line 21 connected between the second heat exchanger 20 and the upper space of the temperature stratification type hot water tank 40, Controls the opening and closing degree of the flow control valve (22) in the controller according to the temperature of the high temperature water sensed by the sensor (23);
The controller controls the degree of opening and closing of the flow control valve 22 in accordance with the temperature of the high temperature water sensed by the temperature sensor 23 so that the temperature and the filling amount of the high temperature water filled in the upper space of the temperature stratification type hot water tank 40 Adjusted to the setting level;
An underground heat source circulation line 33 for supercooling refrigerant is connected to the third heat exchanger 30 and an underground heating medium opening and closing valve 34 is mounted at an inlet side of the underground heat source circulation line 33, Closing of the opening / closing valve (34) is controlled by the controller according to the temperature of the hot water sensed by the temperature sensor (23) mounted on the hot water supply line (21);
The high temperature refrigerant passing through the first heat exchanger 10 is supercooled by the low temperature water flowing from the temperature stratified charge tank 40 via the low temperature water discharge line 41 to the first heat exchanger 10, The underground heating medium opening / closing valve 34 is controlled to be opened in advance and the underground heat source for the supercooling angle is circulated to the third heat exchanger 30 through the underground heat source circulation line 33, The high-temperature refrigerant before passing through the heat exchanger (10) can be supercooled by heat exchange with the underground heat source;
A bypass line 98 out of the refrigerant path 12 of the first heat exchanger 10 is connected between the fourth refrigerant circulation line 94 and the fifth refrigerant circulation line 95, 98 is provided with a first refrigerant opening and closing valve 98-1 and a fourth refrigerant circulation line 94 connected to the refrigerant path 12 of the first heat exchanger 10 through the bypass line 98 A check valve 95-1 is mounted on the fifth refrigerant circulation line 95 to which the second refrigerant on-off valve 94-1 is connected and which is connected to the refrigerant path 12 of the first heat exchanger 10;
If the supercooling degree of the high-temperature refrigerant passing through the first heat exchanger 10 is not set by the low-temperature water flowing into the first heat exchanger 10, the second refrigerant on-off valve 94-1 is controlled to be closed The refrigerant is directly passed through the bypass line 98 without passing through the refrigerant path of the first heat exchanger 10 and the second refrigerant is circulated through the fifth refrigerant circulation line 98. [ (95);
An auxiliary water supply tank 35 for circulating and supplying cooling water for supercooling the refrigerant is further connected to the first heat exchanger 10 and the second superheater 50 and the load heat exchanger 80 are connected to the first hot water heating medium circulation And a cooling tower (36) for cooling the hot water heating medium circulating through the line (51) is further connected to the heat pump system. delete delete delete delete

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