KR20140115714A - Hybrid Type Heat-Pump System using air heat - Google Patents

Abstract

The present invention relates to a hybrid type heat pump system using air heat and water heat as a heat source. The heat pump system of the present invention comprises two processing units for providing water; two heat exchangers for heat-exchanging with water; a heat pump unit having an air heat exchanger (an evaporator); a defrosting unit designed using the processing units; and serial and parallel pipelines installed in the heat pump unit. The heat pump system optimally operates based on each operation state of the system in order to generate hot water and cold water and to perform a defrosting process.

Description

[0001] Hybrid type air heat pump system [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump system, and more particularly, to a so-called hybrid type air heat pump system using air heat and hydrothermal heat as heat sources.

Generally, a heat pump refers to a device that pumps heat or low temperature from air, ground water, and stored water. It is mainly used for the heating and cooling of buildings, industrial houses, industrial facilities, It is used. The heat pump for this purpose basically comprises an evaporator, a compressor, a condenser, an expansion valve, and the like, and the heat medium oil heat exchanger circulates the elements in a circuit, and performs heat absorption and heat dissipation as needed.

As a heat source used in this system, conventionally, air heat, ground water, or wastewater have been mainly used. However, due to the problem of system overload caused by continuous use of one heat source, difficulty in supplying the heat source continuously depending on the kind, and economical problems of the heat source, problems have arisen and a so-called hybrid system using two heat sources has recently been proposed.

As the prior art that can be compared to the present invention, the following two examples are given.

First of all, in a practical registration No. 339347, a hybrid heat pump using hydrothermal and air heat is disclosed. The device uses the hot water during the day and the heat exchange at night using the air heat to improve the mechanical efficiency of the heat pump by continuous heat exchange and at the same time to reduce the energy cost.

However, this structure is not designed to mix the heat and air heat properly, but is designed to be used selectively. Therefore, it can be said that this is substantially different from a device using a conventional single heat source.

Next, Japanese Patent No. 1093211 discloses a hybrid type cold / hot water system using heat pumps using air heat and hydrothermal sources. The system combines two heat pump units, one using air heat and one using hydrothermal heat, to provide continuous supply of heat sources, mechanical stability, and cross-use between heat sources.

However, this system is a structure that combines two heat pump units and another defrost unit, and in this case, each heat pump unit also includes a large number of components, which is large and complicated, so that it is not practical for practical application. Furthermore, when the defrost unit is operated, the compressor and other elements are damaged due to the inverse balancing caused by the instantaneous high-to-low pressure change during the operation of the heat pump cycle.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above. It is an object of the present invention to provide a heat pump system which is improved in energy and mechanical efficiency by appropriately using air heat and hydrothermal heat,

The heat pump system of the present invention comprises:

A first processing unit and a second processing unit, each of which includes a water supply line, a water return line, and a circulation pump, and outputs the hot water or cold water through heat exchange in the first heat exchanger and the second heat exchanger;

A second heat exchanger for exchanging heat with water supplied from the second treatment section water supply line, a second heat exchanger for exchanging heat with the outside air A heat pump unit in which a flow of heat medium is controlled by a four-way valve;

A hot water circulation circuit including both lines of the second treatment section and a hot water tank disposed therebetween, the hot water circulation circuit comprising: an upper part for heat-exchanging in the second heat exchanger;

.

Preferably, the heat pump unit comprises: a series pipe and valve directly connecting the expansion valve and the evaporator; And a parallel pipe connecting the second heat exchanger to the series pipe and a valve.

Still preferably, the heat pump unit further comprises: a single-shaft conduit connected to the compressor without passing through the evaporator and a valve.

The heat pump system of the present invention can be designed so that hot water production, cold water production, defrost operation, etc. can be performed while using one heat pump unit while using air heat and hydrothermal source together. Therefore, according to the present invention, it is possible to improve the energy and mechanical efficiency of the system, and to design the structure as simple and compact as possible, so that the installation and application are easy.

1 is a configuration diagram of a heat pump system according to the present invention;
FIG. 2 is a view for explaining hot water production operation using FIG. 1; FIG.
Fig. 3 is a view for explaining the defrosting operation using Fig. 1; Fig.
Fig. 4 is a view for explaining the simultaneous cold / hot water production operation using Fig. 1; Fig.
5 is a view for explaining cold water production operation using Fig. 1; Fig.

The features and operation effects of the heat pump system of the present invention described or not described above will become more apparent from the following description of the embodiments with reference to the accompanying drawings. In each figure, the heat pump system of the present invention is indicated by the reference numeral '10'.

1, a heat pump system 10 according to the present invention includes a first processing unit 10a and a second processing unit 10b for supplying and outputting water, a water supply unit for supplying water to the processing units 10a and 10b, A circulation-type heat pump unit 20 designed to exchange heat, and a top portion 30 designed in the form of a closed circuit in the second processing portion 10b. First, it will be understood that the upper portion 30 is a structure for removing frost or frost on a part constituting the heat pump unit 20.

The first processing unit 10a and the second processing unit 10b are connected to the water supply lines 12a and 12b and the water return lines 13a and 13b and the circulation pumps 14a and 14b extending from the storage tanks 11a and 11b, And is designed to output cold / hot water by exchanging heat with the circulating heating medium of the heat pump unit 20 in the first heat exchanger 22 and the second heat exchanger 23 described later. In each of the processing units 10a and 10b, the water supply line and the water return lines 12a-12b and 13a-13b may be changed in position according to the operation state of the system 10. [

Here, the second processing unit 10b further includes the upper portion 30 as compared with the first processing unit 10a. The upper part 30 is a hot water circulation circuit including both lines 12b and 13b of the second processing part 10b and a hot water tank 31 interposed therebetween. In the second heat exchanger 23, It is designed for heat exchange. In the present invention, since the structure of the upper portion 30 is not involved in the high-pressure and low-pressure cycles of the heat pump unit 20, it is necessary to reverse the high-pressure and low-pressure cycles of the heat pump unit 20 for defrosting There is no.

The hot water of the upper portion 30 may be separately supplied. Although not shown, the hot water produced by the first processing unit 10a or the second processing unit 10b may be designed to be supplied to the upper portion 30. At this time, the hot water tank 31 need not necessarily be provided separately from the storage tanks 11a and 11b, but can be replaced with only the storage tanks 11a and 11b structurally.

The heat pump unit 20 includes a compressor 21 for supplying a circulating heating medium at a high temperature and a high pressure, a first heat exchanger 22 for exchanging heat with water supplied to the first treatment section feed line 12a, A second heat exchanger 23 for exchanging heat with the water supplied to the second treatment section water feed line 12b and an evaporator 25 for heat exchange with outside air, The flow is controlled. Reference numeral 29 denotes a receiver for temporarily storing the condensed and liquefied heating medium while passing through the first heat exchanger 22 or for recovering and storing the heating medium when the system is stopped.

Through the heat pump unit 20 having such a structure, the heating medium is circulated while performing necessary changes such as compression, condensation, decompression, and evaporation.

In the present embodiment, the heat pump unit 20 includes a series pipe 27a for directly connecting the expansion valve 24 and the evaporator 25, an on-off valve V1, and a second heat exchanger 23 And a parallel pipe 28 connected to the series pipe 27a and the on-off valve V2. The heat pump unit 20 further includes a second expansion valve 23 and a valve V3 connected to the compressor 21 without passing through the evaporator 25. It is believed that the structures associated with the conduits 27a, 27b, 28 are in fact advantageous for producing optimal operation in accordance with the required operating conditions of the system 10. [

The above-described configurations allow the heat pump system 10 of the present invention to efficiently perform necessary operations such as hot water production, cold water production, and defrosting operation, as required, by a relatively simple configuration. The operating states that can be controlled and performed through the heat pump system 10 of the present invention are described below.

Air heat  - Operation of hot water production

2, the heat medium having high temperature and high pressure supplied through the compressor 21 is subjected to heat exchange with the water supplied to the water supply line 12a of the first processing unit 10a while passing through the first heat exchanger 22 . Therefore, hot water can be output through the water return line 13a.

In the drawing, the valve V1 of the series line 27a is open, and the valve V2 of the parallel line 28 and the valve V3 of the single line 27b are closed. Therefore, the heat medium after the heat exchange is sucked into the compressor 21 through the receiver 29, the expansion valve 24, and the evaporator 25 in this order. Then, the hot water is continuously circulated while being circulated through the first heat exchanger (22).

Air heat  - Defrosting operation

Referring to FIG. 3, when a certain amount of water is supplied to the evaporator 25 during the hot water production operation of FIG. 2, the valve V4 of the upper portion 30 is opened while the water supply from the storage tank 11b is stopped, The water in the tank 31 circulates through the upper portion 30 circuit and the heat exchanges with the low-pressure heat medium in the second heat exchanger 23 at this time. Naturally, the valve V2 of the parallel conduit 28 is open and the valve V1 of the serial conduit 27a is closed. Thereafter, the low-pressure, high-temperature heating medium is supplied to the evaporator 25, and the enemy phase is removed.

The heat medium is exchanged with the red phase by a low pressure and low temperature, and is again sucked into the compressor (21), so that hot water production operation as shown in FIG. 2 can be performed. That is, the conventional cycle continues even during defrosting. Here, the hot water in the hot water tank 31 is hot water supplied or separately supplied from the first processing unit 10a or the second processing unit 10b.

Hydrothermal - Production of hot / cold water

4, the heat medium having high temperature and high pressure supplied through the compressor 21 is subjected to heat exchange with the water supplied to the water supply line 12a of the first processing unit 10a while passing through the first heat exchanger 22 . Therefore, hot water can be output through the water return line 13a.

In the drawing, the valve V1 of the series line 27a is closed, and the valve V2 of the parallel line 28 and the valve V3 of the single line 27b are open. After the heat exchange, the heat medium is supplied to the second heat exchanger 23 at a low temperature and a low pressure after passing through the receiver 29 and the expansion valve 24. At this time, the water supply line 12b of the second processing unit 10b, Exchanged with the water supplied as water. Therefore, cold water can be output through the water return line 13b.

Thereafter, the low-pressure heat medium is sucked into the compressor 21 via the single-shaft conduit 27b through the evaporator 25 or the evaporator 25 and the on-off valve V3. Then, the hot water and cold water can be continuously produced while circulating through the first heat exchanger (22).

Air heat  - Chilled / hot water production operation

5, the high-temperature and high-pressure heat medium supplied through the compressor 21 is heat-exchanged with air in the evaporator 5, then flows into the receiver 29, passes through the expansion valve 24, Passes through the heat exchanger (22). At this time, heat exchange is performed with the water supplied to the water supply line 12a of the first processing unit 10a. Therefore, the cold water can be output through the water return line 13a. If only cold water production is required, the valve V1 of the series line 27a is open and the valve V2 of the parallel line 28 is closed.

However, in the case of simultaneous production of cold water and hot water, the valve V1 of the serial line 27a is closed and open, and the valve V2 of the parallel line 28 is open. In this state, the high-temperature and high-pressure heat medium supplied through the compressor 21 is supplied to the second heat exchanger 23 via the evaporator 5. At this time, the water supplied to the water supply line 12b of the second processing unit 10b And heat exchange is performed. Therefore, hot water can be output through the water return line 13b.

Here, whether or not the fan of the evaporator 5 is operated depends on the amount of hot water used. For example, when the amount of hot water to be used is large, the single axis pipe 27b may be simultaneously opened to facilitate the flow of the high temperature and high pressure heat medium.

The heating medium used for hot water production passes through the first heat exchanger 22 through the receiver 29 and the expansion valve 24 to produce cold water as described above and then sucked into the compressor at a low pressure Hot water and cold water can be continuously produced while circulating the hot water in the second treatment section 10b and the cold water production cycle in the first treatment section 10a.

As can be seen from the above-described operating state or method, the heat pump system 10 of the present invention is designed to appropriately use the air heat and the heat heat and to use the circuit efficiently as required, And can be operated for purposes such as hot water production, cold water production, and defrosting.

10. Heat pump system 10a. The first processing unit
10b. The second processing unit 11a, 11b. Storage tank
12a, 12b. Water supply lines 13a and 13b. Water line
14a, 14b. Circulation pump 20. Heat pump unit
21. Compressor 22. First heat exchanger
23. Second heat exchanger 24. Expansion valve
25. Evaporator 26. Four-way valve
27a. Series line 27b. Shortening duct
28. Parallel piping 30. Top section
31. Hot water tank
V1, V2, V3, V4. valve

Claims (11)

(12a and 12b) and water-return lines (13a and 13b) and circulation pumps (14a and 14b), and the hot water or hot water in the first heat exchanger (22) and the second heat exchanger (23) A first processing unit 10a and a second processing unit 10b for outputting cold water;
A compressor 21 for supplying the heating medium at a high temperature and a high pressure, a first heat exchanger 22 for performing heat exchange with water supplied to the first treatment section water feed line, a pressure reducing expansion valve 24, A second heat exchanger (23) for exchanging heat, and an evaporator (25) for heat exchange with air, the heat pump unit (20) having a heating fluid flow controlled by a four - way valve (26);
(30) for heat exchange in the second heat exchanger (23), the circulation circuit including both lines (12b, 13b) of the second treatment section and a hot water tank (31) disposed therebetween.
The heat pump system comprising:
The method according to claim 1,
The heat pump unit (20) comprises:
A series line 27a and a valve V1 for directly connecting the expansion valve and the evaporator;
A parallel line (28) connecting the second heat exchanger to the series line and a valve (V2);
Further comprising: a first heat exchanger for supplying heat to the first heat exchanger;
3. The method according to claim 1 or 2,
The heat pump unit (20) comprises:
A single-shaft conduit 27b and a valve V3 connected to the compressor without passing through the evaporator;
Further comprising: a second heat pump system for heating the first heat pump system.
3. The method of claim 2,
In the hot water production operation,
The high-temperature and high-pressure heat medium supplied through the compressor 21 passes through the first heat exchanger 22 and is heat-exchanged with the water supplied to the water supply line 12a of the first processing unit 10a, And the hot water is output through the heat exchanger;
Wherein the series line 27a is open and the parallel line 28 is closed;
The heat medium after the heat exchange is sucked into the compressor 21 in the low pressure state through the expansion valve 24 and the evaporator 25 in order;
Wherein the heat pump system is a hybrid type air heat pump system.
3. The method of claim 2,
In the defrost operation,
The water in the hot water tank 31 flows into the upper portion 30 circuit while the valve V4 in the upper portion 30 is opened while the water supply from the storage tank 11b is stopped Exchanged with the low-pressure heat medium in the second heat exchanger 23, and then the high-temperature heat medium is supplied to the evaporator 25 to remove the droplet;
Wherein the parallel conduit 28 is open and the series conduit 27a is closed;
Wherein the heat pump system is a hybrid type air heat pump system.
3. The method of claim 2,
The heat pump system is operated in the hot water / cold water production operation:
The high-temperature and high-pressure heat medium supplied through the compressor 21 passes through the first heat exchanger 22 and is heat-exchanged with the water supplied to the water supply line 12a of the first processing unit 10a, The hot water is output through the hot water supply unit 13a;
Wherein the series line 27a is closed and the parallel line 28 is open;
After passing through the expansion valve 24, the heat medium is supplied to the second heat exchanger 23 at a low temperature and a low pressure. At this time, heat exchange with water supplied to the water feed line 12b of the second processing unit 10b The cold water is output through the water return line 13b as it is made;
Wherein the heat pump system is a hybrid type air heat pump system.
The method according to claim 6,
The heat pump unit (20) includes a single-shaft conduit (27b) and a valve (V3) connected to the compressor without passing through an evaporator;
The low-pressure heat medium after heat exchange in the second heat exchanger 23 is sucked into the compressor 21 via the evaporator 25 or the single-shaft duct 27b;
Wherein the heat pump system is a hybrid type air heat pump system.
3. The method of claim 2,
The heat pump system is operated in cold water production operation:
The high-temperature and high-pressure heat medium supplied through the compressor 21 passes through the first heat exchanger 22 at a low temperature and a low pressure via the expansion valve 24 after heat exchange with air in the evaporator 5, As the heat exchange with the water supplied to the water supply line 12a is performed, cold water is output through the water return line 13a;
Wherein the series line 27a is open and the parallel line 28 is closed;
Wherein the heat pump system is a hybrid type air heat pump system.
3. The method of claim 2,
The heat pump system is operated in cold water / hot water production operation:
The high-temperature and high-pressure heat medium supplied through the compressor 21 is supplied to the second heat exchanger 23 via the evaporator 5. At this time, heat exchange with water supplied to the water supply line 12b of the second processing unit 10b Accordingly, hot water is output through the water return line 13b;
Wherein the series line 27a is closed and the parallel line 28 is open;
As the heat medium passes through the first heat exchanger 22 at low temperature and low pressure via the expansion valve 24 and heat exchange with water supplied to the water feed line 12a of the first processing section 10a is performed, The cold water is output through the heat exchanger 13a;
Wherein the heat pump system is a hybrid type air heat pump system.
10. The method of claim 9,
The heat pump unit (20) includes a single-shaft conduit (27b) and a valve (V3) connected to a compressor without passing through an evaporator;
The single-shaft conduit 27b is opened or closed according to the amount of hot water output;
Wherein the heat pump system is a hybrid type air heat pump system.
6. The method of claim 5,
Wherein the hot water of the hot water tank (31) is hot water supplied or supplied separately from the first processing unit (10a) or the second processing unit (10b).

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