KR101339297B1 - Multifunctional heat pump system using the geothermal heat - Google Patents

Abstract

The present invention relates to a multifunctional heat pump system using geothermal heat and, specifically, to a multifunctional heat pump system using geothermal heat to improve heat efficiency and reduce power consumption for operating the system by enabling the supply of hot water heat-exchanged in two heat exchangers to one side and the supply of the hot water to the other side when one side is not in use by installing a bypass line between a heating circulation pipe, which circulates between a heating heat exchanger and a heating water tank, and a hot water line, which circulates between a hot water exchanger and a hot water tank.

Description

Multifunctional heat pump system using the geothermal heat}

The present invention relates to a multi-functional heat pump system using geothermal heat, and more particularly, to a multi-functional heat pump system using geothermal heat that can minimize heat loss, as well as cooling and heating at low power, as well as hot water supply.

More specifically, the present invention provides a bypass line between the heating water line circulating between the heating heat exchanger and the heating water tank, and the hot water heating line circulating between the hot water heat exchanger and the hot water tank, and heat exchanges the two heat exchangers as necessary. The present invention relates to a multifunctional heat pump system using geothermal heat that supplies hot water to one side to supply hot water to the other side when one side is not used, thereby improving thermal efficiency and reducing power required to drive the system. will be.

Generally, a heat pump system is a system that performs a combined function of heating and cooling by changing the circulation direction of refrigerant using a single device. In addition, the heat pump system may have various structures depending on the selection of heat source or load. For example, a heat pump system using geothermal heat as a heat source absorbs heat from a heat source or emits heat as a heat source by using an underground heat exchanger, The cooling and heating are performed.

Such a conventional heat pump system is composed of an indoor unit and an outdoor unit that are interconnected through a refrigerant pipe to cool or heat the room. The indoor unit includes an indoor heat exchanger that radiates cold air (or warmth) The outdoor unit includes a compressor installed in the middle of the refrigerant pipe and an outdoor heat exchanger connected to the compressor through the refrigerant pipe to dissipate heat (or cool air) to the outside, and an outdoor heat exchanger Blower. Further, the refrigerant pipe between the indoor / outdoor heat exchangers is provided with an expansion valve.

When the refrigerant passing through the refrigerant pipe is moved in the direction of the outdoor heat exchanger from the indoor heat exchanger, the conventional heat pump system configured as described above allows the indoor heat exchanger to evaporate the refrigerant to supply cold air to the room, The refrigerant in the indoor heat exchanger can be condensed to supply warm air into the room. Such a heat pump system is driven by electricity as a power source and requires a lot of power consumption, which is disadvantageous in that it is expensive to operate.

In order to improve the above disadvantages, various cooling and heating systems have been developed and provided to increase thermal efficiency or energy efficiency. Various techniques such as Patent Documents 1 and 2 have been developed by the present applicant as related technologies.

Patent document 1 discloses an indoor unit including an indoor heat exchanger, an outdoor unit including a compressor connected through the indoor heat exchanger and a first connection pipe, an outdoor heat exchanger and a blower connected through the compressor and a second connection pipe, and the indoor and external heat exchange. A heat pump type heating and cooling device comprising a third connecting pipe interconnecting the groups and provided with an expansion valve therebetween; Between the second connecting pipe and the third connecting pipe, a parallel passage pipe including a passage passing through the geothermal heat dissipation portion is further provided so that the temperature of the refrigerant circulated therein is further provided; It is configured to further include a humidifying device provided around the first connecting pipe to maintain the humidity in the room through the refrigerant that is heated to a high temperature in the first connecting pipe, Patent Document 2 absorbs solar heat to heat the water heat Underground heat storage means, which is buried in the heat collecting means and the ground, is connected to the solar heat collecting means by a heat storage circulation tube, and the water heated by the solar heat collecting means circulates to heat soil in the ground to store heat; A hot water tank connected to the middle of the heat storage circulation pipe; It is configured to include a heating means connected to the hot water tank to heat the heat by the circulation of hot water heated by the solar heat collecting means or hot water stored in the underground heat storage means.

However, this conventional technology has a problem that can not supply hot water filled with high heating and cooling efficiency, but the hot water supply function is low, there is a patent document 3 as a technology registered and patented to improve this. As shown in FIG. 6, the refrigerant line is configured such that the refrigerant circulates through the compressor 110, the directional valve 120, the heat source side heat exchanger 150, the expansion device 140, and the load side heat exchanger 130. A heat source side secondary fluid line (L200) having a heat pump unit (100) having an L100 and a heat source side secondary fluid heat-exchanged with the heat source (210) is configured to exchange heat with the refrigerant of the heat pump unit in the heat source side heat exchanger (L200). And a secondary fluid line (L300) for heating and cooling formed with a heat source unit (200) having a heat exchanger and a secondary fluid for heating / cooling heat exchanged with a cooling / heating load (380) to exchange heat with the refrigerant of the heat pump unit in the load side heat exchanger. And a load unit 300 having a hot water supply secondary fluid line L320 through which a hot water secondary fluid supplied for hot water flows, wherein the refrigerant discharged from the compressor of the heat pump unit and the water supply secondary water Hot water heat exchanger 400 and the fluid heat exchange In the heat source unit is composed of a heating heat exchanger (500) into which the air for the second heat exchange fluid from the load-side heat exchanger 130 in the heat source side and the secondary fluid, the load unit that flows a group wherein the heat source-side heat exchanger.

In the conventional heat pump system, the heat source side secondary fluid, which is raised due to heat exchange between the load side secondary fluid and the heat source side secondary fluid, raises the evaporation temperature of the refrigerant flowing through the heat pump system, thereby increasing the compressor outlet and condensation temperature. Due to the increase, there is an effect that can supply a high temperature hot water for heating and hot water supply.

However, the heat pump system of Patent Document 3 can supply hot water by raising the temperature of hot water, but has a disadvantage in that thermal efficiency and energy efficiency are inferior.

That is, as shown in Figure 6, the heating heat exchanger 130 and the hot water supply heat exchanger 400 is separated, and during heating the hot water heat exchanged in the load heat exchanger 130 to the heating and cooling heat storage tank 310 load Is supplied to the heating and the hot water heat exchanged by the hot water supply heat exchanger 400 is left unused in a state stored in the hot water storage heat storage tank 340, the heat of the hot water storage heat tank or hot water heat exchanger is discarded. The state becomes low and thermal efficiency falls. Accordingly, in order to heat the system, the system needs to be driven for a longer period of time or at higher power, thereby lowering energy efficiency.

Korean Patent Registration No. 0496895 Korean Patent Registration No. 1100096 Korea Patent Registration No. 1147268

The present invention has been developed to solve the problems of the prior art as described above, it is possible to ensure that the hot water heat-exchanged in the heat exchanger is continuously provided to the heating or hot water so that any one of the heat exchangers do not generate an idle heat exchanger. The purpose of this invention is to provide a multifunctional heat pump system using geothermal heat that can minimize heat loss, as well as provide heating and cooling as well as heating and cooling at lower power.

In detail, the present invention by installing a bypass circulation line to selectively change the flow path between the two hot water circulation line circulating the heating and cooling heat exchanger and the hot water heat exchanger by supplying the heat of the two heat exchangers to the heating or hot water as needed In addition to increasing the thermal efficiency, it is an object of the present invention to provide a multi-functional heat pump system using geothermal heat that can reduce the power required to drive the system as the thermal efficiency increases.

Multifunctional heat pump system using geothermal heat according to the present invention for achieving the object as described above, in the heat pump system having at least a hot water heat exchanger and a heat exchanger for heating and cooling, the connection between the hot water supply heat exchanger and the hot water supply tank (20T) A hot water supply hot water line through which hot water is circulated; A cooling and heating line connected between the cooling and heating heat exchanger and the cooling and heating tank to circulate cooling and cooling water; And a bypass line connected between the hot water supply hot water line and the heating / cooling water line and selectively connected to the heating / cooling water line to circulate the heating / cooling water line through the hot water supply heat exchanger to be heated by the heat of the hot water supply heat exchanger. It features.

In addition, the heat source heat exchanger constituting the present invention is preferably to be heat-exchanged by a geothermal heat exchanger for circulating the geothermal heat in the ground.

In addition, the heat pump system of the present invention is further provided with a cooling expansion valve in parallel with the expansion valve for instantaneously expanding the refrigerant, one side of the expansion valve for cooling the refrigerant cooled in the heat source heat exchanger cool air of the heating and cooling tank It is preferred that a secondary cooling heat exchanger is provided for cooling the furnace.

As described above, the multi-functional heat pump system using geothermal heat according to the present invention drives the heating / cooling heat exchanger and the hot water supply heat exchanger at the same time, but when the hot water supply is not used, the hot water circulating in the hot water heat exchanger can be used for heating. It can be heated efficiently in a faster time to not only increase the thermal efficiency, but also to reduce the power required to drive them.

In addition, by providing a cooling expansion valve and a secondary cooling heat exchanger to cool the refrigerant with cooling water circulating in the cooling tank, the temperature of the refrigerant is cooled in advance, thereby reducing the cooling load in the expansion valve and the HVAC exchanger, thereby improving cooling efficiency. Not only can it reduce the power required to drive them.

1 is a block diagram of a multifunctional heat pump system using geothermal heat according to the present invention
Figure 2 is a flow chart of hot water supply and heating when the multi-function heat pump system using geothermal heat according to the present invention is used for heating
3 is a flow chart of hot water supply and hot water when the multi-function heat pump system using geothermal heat according to the present invention is used for heating and hot water supply
4 is a flow chart of hot water supply and hot water when the multi-function heat pump system using geothermal heat according to the present invention is used for cooling
5 is a flow chart of hot water supply and hot water when the multifunctional heat pump system using geothermal heat according to the present invention is used for cooling and hot water supply.
6 is a configuration diagram of a conventional multifunctional heat pump system

Hereinafter, a multifunctional heat pump system using geothermal energy according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a heat pump system capable of increasing thermal efficiency and reducing power consumption, and includes at least a hot water supply heat exchanger (20) and a heating / cooling heat exchanger (40).

The hot water heat exchanger 20 and the air-conditioning heat exchanger 40 are similar to an indoor heat exchanger that functions as a condenser when heating and an evaporator when cooling in a conventional heat pump system. ) Is used to heat the hot water supply hot water used for washing or sour, air-conditioning heat exchanger 40 is used for heating and cooling by heat-exchanging with cold half water used for heating or cooling.

As shown in FIGS. 1 to 5, the two heat exchangers 20 and 40 are connected to a middle of the refrigerant line RL through which the refrigerant is circulated to exchange heat with hot water or heating water during a heating or cooling cycle. Thus, the heat pump system for generating cold or warm air in the two heat exchangers (20, 40) is similar to the conventional heat pump system, the compressor 10, the four-way valve 30, expansion valve 50, The heat source heat exchanger 60 is provided.

As described above, the compressor 10 is similar to that provided in the conventional heat pump system, and is a means for compressing the refrigerant circulating through the refrigerant line RL to high temperature and high pressure, and the four-way valve 30 It is for adjusting the circulation direction, and it is a flow path switching valve for switching the flow of refrigerant during heating and cooling.

The heat source heat exchanger 60 is similar to the outdoor heat exchanger, that is, the role of the evaporator when heating and the condenser when cooling in a conventional heat pump system.

The heat source heat exchanger 60 is referred to as a heat source heat exchanger as described above as a means of being a heat source when viewed from the time of cooling and heating or hot water supply heat exchanger.

The present invention provides a hot water supply tank 20T for storing hot water circulating hot water circulating the hot water heat exchanger 20 of the heat pump system configured as described above, and an air conditioner for cooling and cooling water circulating the air conditioning heat exchanger 40. A water tank 40T is provided.

In addition, between the hot water supply heat exchanger 20 and the hot water supply tank 20T, a hot water supply hot water line 20L through which hot water is circulated is connected, and cooling and heating water is provided between the air conditioning heat exchanger 40 and the air conditioning water tank 40T. The circulation heating and cooling line 40L is connected, and bypass lines 24R1 and 24R2 are further connected between the hot water supply line 20L and the cooling and heating line 40L.

Patent No. 1147268, filed and registered by the present applicant as described above, has only a hot water supply hot water line 20L and a cooling / heating water line 40L, and the hot water supply heat exchanger 20 is used only for heating of hot water supply and heating, and heating and cooling heat exchange. The group 40 is used only for heating the heating water. When the heating system is configured in this way, the hot water heat exchanger is also exchanging heat, but the hot water exchanged in the hot water heat exchanger simply loses heat to the outside while repeatedly circulating between the hot water tank and the hot water heat exchanger, causing heat loss. Can be.

The present invention further installed the bypass lines 24R1 and 24R2 described above to remedy this disadvantage.

The bypass lines 24R1 and 24R2 are connected in parallel between the hot water supply line 20L and the hot and cold water line 40L to be selectively connected to the hot and cold water line 40L to heat the hot water heat exchanger 20. It can be used for heating.
In more detail, as shown in FIGS. 1 to 5, one of the bypass lines 24R1 of the bypass lines 24R1 and 24R2 is connected to the outlet water heating line of the air-conditioning heat exchanger 40 and the other end thereof. Is connected to the inlet-side hot water supply hot water line (20L) of the hot water supply heat exchanger (20), the valve V2 is provided in the middle of the water flow is intermittent.
The other bypass line 24L2 has one end connected to the inlet-side heating water line of the cooling / heating tank 40T and the other end thereof to the outlet-side hot water supply line 20L of the hot water supply heat exchanger 20.
The bypass lines 24R1 and 24R2 prevent the heating water of the heating and cooling line from passing through or passing the hot water supply heat exchanger 20 according to the opening and closing of the valve V2.
That is, when the water of the hot water supply heat exchanger 20 is not used as hot water, the valve V2 is opened so that the heating water of the heating water line flows through the hot water supply heat exchanger so that the heat of the hot water supply heat exchanger can be supplied to the heating water. When the hot water passing through the hot water supply heat exchanger is prevented and the heat of the hot water heat exchanger is used, the valve V2 is closed so that the heat of the hot water heat exchanger 20 is used to heat the hot water.

The heat pump system of the present invention will be described in detail as a multifunctional heat pump system capable of supplying hot water as well as heating and cooling.

First, only heating.

As shown in Fig. 2, when the heat pump system of the present invention is driven by heating, valves V1, V3, and V4 are shut off, and valves V2 and V5 are opened, so that hot water does not flow into the hot water supply hot water line 20L. , The cooling and heating water of the heating and cooling tank (40T) is circulated in the case of the air-conditioning heat exchanger (40), bypass line (20R1), hot water supply heat exchanger (20) bypass line (24R2). By circulating through the two heat exchangers 20 and 40 in this way, the heating and cooling water can be heated to a higher temperature more quickly, thereby reducing the time and power required to drive the system. In addition, by using the heat of the hot water supply heat exchanger, which is heated even while the hot water is not used, the thermal efficiency can be increased.

The following is the case of using heating and hot water at the same time.

This opens all of the valves V1 to V5, as shown in FIG.

When the valves V1, V3, V4 V5 are opened, and the valve V2 is closed, the hot water of the hot water supply tank 20T via the hot water heat exchanger 20 circulates through the hot water supply hot water line 20L and in the hot water supply tank 20T. Heated hot water is provided to the user, and the air-conditioning water of the air-conditioning tank 40T passing through the air-conditioning heat exchanger 40 circulates through the air-conditioning line 20L to heat the air-conditioning water in the air-conditioning tank 40T to heat it. It is provided to the pipe to achieve heating.

Preferably, the valves V1 to V5 are solenoid valves that can be opened and closed automatically by a condition set in a controller (not shown and not described), and such a control method controls a conventional heat pump system. The technique can be modified.

The heat pump system according to the present invention may be used for cooling, and further includes a cooling expansion valve 51 and a secondary cooling heat exchanger 52 as a means for increasing the cooling efficiency.

The cooling expansion valve 51 and the secondary cooling heat exchanger 52 are connected in parallel with the expansion valve 50 to operate only during cooling.

The heat pump system according to the present invention may be driven only for cooling, or may be driven so that cooling and hot water can be performed simultaneously.

First, the driving only for cooling, as shown in Figure 4,

The valves V2, V3, and V4 are shut off, and the valves V5, V6 and V7 are open, and the flow of the refrigerant is blocked by the check valve CV2 provided on one side of the expansion valve 50, so that the refrigerant is a cooling expansion valve ( 51 is supplied to the air conditioning heat exchanger (40).

That is, the air compressed by the compressor discharges heat from the heat source heat exchanger (60) and passes through the secondary cooling heat exchanger (52), and is secondarily cooled and cooled in an expanded state by the cooling expansion valve (51). Returned to the compressor (10) via the heat exchanger (40), wherein the cooling and cooling water passing through the secondary cooling heat exchanger (52), that is, cooled by the air-conditioning heat exchanger and circulated through the cooling / heating tank (40T). The refrigerant passing through the secondary cooling heat exchanger 52 is cooled by cold air of cooling and heating water.

Typically, the temperature of the refrigerant output from the heat source heat exchanger 60 during cooling is about 35 ° C., and the temperature of the cooling and heating water via the cooling / heating tank 40T is about 12 ° C. By supplying the cooling and cooling water of low temperature via the cooling and cooling water tank 40T to the secondary cooling heat exchanger 52, the temperature of the refrigerant passing through the secondary cooling heat exchanger 52 is lowered and thus the secondary cooling heat exchanger ( The temperature of the refrigerant passing through 52 is about 25 ° C., and thus the refrigerant having such a low temperature passes through the cooling expansion valve 51, and thus the cooling load applied to the cooling expansion valve 51 may be under pressure.

Next, cooling and hot water supply are the same, and as shown in FIG. 5, valve V1, V3, V4, V6, V7 is open, and valve V2, V5 is closed. Therefore, the cooling and cooling water in the air conditioning and heating tank (40T) is circulated through the cooling and heating line (40l)-cooling line (52L)-secondary cooling heat exchanger (52)-cooling expansion valve (51)-heating and cooling heat exchanger (40) The hot water supply water of the hot water supply tank 20T is circulated along the hot water supply hot water line 20L via the hot water supply heat exchanger 20.

Accordingly, while cooling is performed, hot water can be used.

As described above, the hot water supply heat exchanger 20 is installed between the condenser 10 and the four-way valve 40 in order to enable the hot water supply function to be used for both cooling and heating. Regardless of the operation method, the hot water heat exchanger 20 should be capable of exchanging high temperature heat.

In addition, the heat pump system according to the present invention may be connected in series or parallel to the geothermal heat exchanger 70 to the heat source heat exchanger 60 to increase the thermal efficiency possible.

The drawings show that the geothermal heat exchanger is connected in parallel as an example, but the claims of the present invention are not limited thereto.

The underground heat exchanger (70) is embedded in the ground to heat or heat the ground heat to cool or heat the heat source heat exchanger (6). The technology associated with such a geothermal heat exchanger has already been developed and applied for and registered by the present application. The detailed description thereof is omitted.

In FIG. 1 to FIG. 5, reference numeral 80 denotes a gas-liquid separation function for separating moisture from the refrigerant with an accumulator, and reference numeral 90 denotes a pressure equalizing valve for balancing pressure in the refrigerant line RL.

10: Compressor
20: hot water heat exchanger
20L: Hot water supply line 24R1, 24R2: Bypass line
20T: Hot Water Tank
30: Four-way valve
40: air conditioning heat exchanger
40L: HVAC line 40T: HVAC tank
50: expansion valve
51: expansion valve for cooling 52: secondary cooling heat exchanger 52L: cooling line
60: heat source heat exchanger
70: geothermal exchanger
80: accumulator
CW: access window
RL: refrigerant circulation line
V1 ~ V7: Valve
CV1: check valve

Claims (3)

Hot water supply hot water line 20L having at least a hot water supply heat exchanger 20, an air conditioning heating and heat exchanger 40, and an expansion valve 50, which is connected between the hot water supply heat exchanger and the hot water supply tank 20T, and circulates hot water with hot water. In this connection, the heat pump system is connected between the air-conditioning heat exchanger 40 and the air-conditioning tank (40T) connected to the air-conditioning line (40L) for cooling and cooling water circulation,
The bypass line 24L1, 24L2 is further installed between the hot water supply hot water line 20L and the cooling and heating line 40L, but one end of the bypass line 24L1 is located at the outlet side of the heating / cooling heat exchanger 40. The other end is connected to the hot water supply hot water line 20L of the inlet side of the hot water heat exchanger 20, the valve V1 is provided in the middle of the refrigerant flow is intermittent, the bypass line 24L2 is one end of the cooling and heating water It is connected to the inlet side heating water line of the tank 40T and the other end is connected to the hot water supply hot water line 20L of the outlet side of the hot water supply heat exchanger 20 and provided with a check valve (CV1) in the middle to prevent the back flow of the heating water. ,
In accordance with the opening and closing of the valve (V1) to prevent the heating water in the heating and cooling line via or via the hot water supply heat exchanger 20, when the water of the hot water heat exchanger is not used as hot water to open the heating of the heating water line Water flowed through the hot water supply heat exchanger to supply heat from the hot water heat exchanger to the heating water, thereby preventing heat loss of the hot water supply heat exchanger.
A cooling expansion valve (51) is further provided in parallel with the expansion valve (50), and on one side of the cooling expansion valve (51), the refrigerant cooled in the heat source heat exchanger (60) is cooled by a cold of a heating / cooling water tank. Multifunctional heat pump system using geothermal heat, characterized in that the secondary cooling heat exchanger 52 is provided for. The method of claim 1,
The heat source heat exchanger (60) is a multi-functional heat pump system using geothermal heat, characterized in that the heat exchange by the geothermal heat exchanger 70 for circulating the heat exchanged geothermal ground. delete

Images