KR101177430B1 - Heat pump system with cooling and heating using renewable energy - Google Patents

Abstract

PURPOSE: A heat pump system for cooling and heating using renewable energy is provided to secure stable system operation by using solar energy as auxiliary heat source. CONSTITUTION: A heat pump system comprises an auxiliary tank(126) and a dual pipe(108). The auxiliary tank is located between a four-way valve(106) and an evaporator(124) and makes refrigerant circulating through multi-effect compression cycle into saturated vapor or over-heated vapor. The auxiliary tank uses solar energy as auxiliary heat source. The dual pipe is installed for the heat exchanging of refrigerant circulating through an economizer(118) and a site glass and supplies the refrigerant to a compressor(102) to increase the exhaust temperature of refrigerant.

Description

Heat pump system for both heating and cooling using renewable energy {HEAT PUMP SYSTEM WITH COOLING AND HEATING USING RENEWABLE ENERGY}

The present invention relates to a heat pump system, and more particularly, to a heat pump system using renewable energy to increase the stability and heating and cooling efficiency of the system.

Conventional heat pumps (refrigerators) use refrigerant to obtain hot water in winter, compressor-> oil separator-> condenser-> economize (at the same time, expansion valve-> Vapor Injection-> compressor)-> receiver-> filter dryer- The hot water required by the condenser was obtained by circulating in the order of expansion valve-> evaporator-> liquid heater-> compressor.

Such a conventional heat pump was able to obtain hot water for heating while operating in the form of a multi-compression cycle as described above, and was also manufactured in a structure that can obtain cold water for cooling in summer.

However, as described above, the effective compression cycle operates smoothly when the outside air temperature is usually 0 ° C. or lower, and when the outside temperature falls below −10 ° C. to −15 ° C., the external air heat source to be accepted by the evaporator even in the effective compression cycle. There is a problem that can not generate enough discharge temperature in the multi-effect compressor can not supply enough hot water to the condenser, there is a problem that the evaporator (heating) is also lowered due to a decrease in the outside air temperature causes the system instability.

In addition, the conventional heat pump was able to run the cooling cycle for summer while supplying heating by the effective compression cycle, but there was a problem that the instability of the system is caused as the condenser (cooling) pressure increases when the outside air temperature increases.

The present invention is to solve the above problems, in order to partially compensate for the discharge temperature of the compressor is lowered by the outside air when running in the heating cycle by supplying the solar heat to the auxiliary heat source to make the saturated or superheated steam to be sucked into the compressor system It is to provide a heat pump system that operates stably and stably operates the system by supplying water as an auxiliary heat source and exchanging heat with a circulating high temperature refrigerant when the cooling cycle is applied.

In addition, the present invention, in order to solve the above-mentioned problems, the heating cycle is operated in the form of a heating effective compression cycle, and the cooling cycle in the form of a cooling single stage compression cycle to purify the refrigerant in the form of a heat pump for both heating and cooling The purpose is to provide a system.

In order to achieve the object of the present invention as described above, and to perform the characteristic functions of the present invention described below, the characteristic configuration of the present invention is as follows.

According to an embodiment of the present invention, a heat pump system for heating and cooling by circulating a refrigerant in the form of a heating effective compression cycle and a cooling single stage compression cycle, the refrigerant being circulated in a heating effective compression cycle located between four sides and an evaporator An auxiliary tank for supplying solar heat to an auxiliary heat source for saturation or superheated steam, and between the four sides and the condenser and between the compressor and the SOL valve, opening the refrigerant and the SOL valve circulated through economization There is provided a heat pump system including a double pipe to supply the compressor to heat exchange the refrigerant circulated in the sight glass to increase the discharge temperature.

Here, the refrigerant circulating in the heating effective compression cycle is a compressor, an oil separator, a quadrilateral, a double pipe, a plate heat exchanger (condenser), a receiver, a filter drier, a sight glass, an economize, an expansion valve, an evaporator, an auxiliary tank, and four sides. It is circulated in the order of a stool, a liquid separator, a compressor to obtain hot water as a heat source in the condenser.

The auxiliary tank supplies water to a heat source to exchange heat with the refrigerant circulating in the cooling single stage compression cycle, and shuts off the SOL valve to transfer the refrigerant circulating in the cooling single stage compression cycle to the economize and double pipe. Allow them to pass through without heat exchange.

In addition, the refrigerant circulating in the form of the cooling single stage compression cycle includes a compressor, an oil separator, a quadrilateral, an auxiliary tank, a condenser, a receiver, a filter drier, a sight glass, an economize, an expansion valve, a plate heat exchanger (evaporator), and a double pipe. , Circulating in all directions, liquid heater, compressor, the auxiliary tank supplies water to the auxiliary heat source, and shuts off the SOL valve so that the refrigerant just passes through the economize and the double pipe, the evaporator To get cold water as a heat source.

In addition, the evaporator and the condenser may apply any one selected from an air-cooled heat exchanger and a water-cooled heat exchanger.

In addition, the economize is further produced in the form of a container type of the intermediate cooler type, the double tube may be further produced in the form of a plate heat exchanger type.

According to the present invention, the heating refrigerant from the economize and the heating refrigerant of the high temperature and high pressure of the compressor discharge side are heat-exchanged in a double pipe to partially intake some steam refrigerant into the compressor, thereby partially compensating that the discharge temperature of the compressor is lowered by outside air. The effect and the effect of operating stably at the time of heating by supplying sufficient evaporation heat source to the heating refrigerant circulating using solar heat are achieved.

In addition, according to the present invention, when the outside temperature rises in the summer during the cooling cycle, the condenser pressure rises and the system becomes unstable so that the heat exchange between the cold water and the cooling refrigerant in the auxiliary tank is performed stably, even during heating and cooling. Driving effect is achieved.

In addition, due to the combined heating and cooling structure for circulating the refrigerant in the form of a heating effective compression cycle or a cooling single stage compression cycle, an effect of reducing the installation cost, increasing the energy efficiency, and reducing the emission carbon dioxide using renewable energy is achieved.

1 is a block diagram showing an exemplary heat pump system according to an embodiment of the present invention.
2 is a diagram illustrating a refrigerant flow circulating in the form of a heating effective compression cycle of the heat pump system 100 according to an embodiment of the present invention.
3 is a view exemplarily showing a refrigerant flow circulating in the form of a cooling single stage compression cycle of the heat pump system 100 according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

Heat pump system

1 is a block diagram showing an exemplary heat pump system according to an embodiment of the present invention.

Referring to FIG. 1, the heat pump system 100 according to an embodiment of the present invention is a refrigerator for circulating a refrigerant in the form of a heating effective compression cycle and a cooling single stage compression cycle to combine heating and cooling. Oil separator 104, four sides 106, double pipe 108, condenser 110, receiver 112, filter dryer 114, sight glass 116, economize 118, SOL valve ( 120, the expansion valve 122, the evaporator 124, the auxiliary tank 126, the liquid separator 128, the solenoid valves 132, 134, the expansion valve 136, the liquid line 138 and the refrigerant of the compressor 102 It is configured to include a discharge temperature sensor 140.

The compressor 102 of the present invention serves to compress the heating refrigerant or the cooling refrigerant to high temperature and high pressure by receiving the driving force of the engine, and the oil separator 104 returns oil to the compressor 102 without remaining oil. Filtering function, the four sides 106 serves to change the flow direction of the refrigerant during heating or cooling operation.

The double pipe 108 of the present invention is heated through the sight glass 116 by opening the SOL valve 120 and the heating refrigerant circulating in the form of a heating effective compression cycle through the economize 118 which will be described later. It serves to supply heat to the compressor 102 to heat the refrigerant for circulating in the compression cycle to increase the discharge temperature, and when the discharge temperature of the compressor 102 is low during heating, the refrigerant discharge temperature detection sensor of the compressor 102 The solenoid valve 132 is opened so that 140 is above the designated temperature, and the solenoid valve 134 is closed.

However, when the cooling refrigerant is circulated in the form of a single stage compression cycle, the double pipe 120 of the present invention does not have a heat exchanger to serve to pass.

Here, the heating effective compression cycle is a refrigerant for heating the compressor 102, oil separator 104, four sides 106, double pipe 108, plate heat exchanger (condenser, 110), receiver 112, filter Dryer 114, Sight glass 116, Economize 118, Expansion valve 122, Evaporator 124, Auxiliary tank 126, Four sides 106, Liquid separator 128 and Compressor 102 By circulating in order to refer to the process from obtaining the hot water as a heat source in the condenser.

On the other hand, the single stage compression cycle refers to the compressor 102, the oil separator 104, the four-sided 106, the auxiliary tank 126, the condenser 110, the receiver 112, the filter dryer 114, the sight glass 116, economizing 118, expansion valve 122, plate heat exchanger (evaporator, 124), double pipe 108, four sides 106, the heat exchanger 128, compressor 102 in the order of circulation It refers to the process of obtaining cold water as a heat source in the evaporator. The refrigerant flow by the heating effective compression cycle and the single stage compression cycle are shown in FIGS. 2 and 3, respectively, and will be described in more detail later.

The condenser 110 (plate heat exchanger) of the present invention serves to make the heating or cooling refrigerant from the high pressure gas state to the high pressure liquid state, and the receiver 112 temporarily suspends the liquefied refrigerant before sending it to the expansion valve 122. It also serves to store the refrigerant, and also to recover the refrigerant in the unit by pumping down when the unit is repaired or stopped for a long time.

The filter drier 114 of the present invention adversely affects the presence of moisture and the substance during the process of circulating the heating refrigerant in the form of a heating effective compression cycle or the cooling refrigerant in the form of a cooling single stage compression cycle. It serves to remove.

The sight glass 116 of the present invention serves to check whether the heating refrigerant or the cooling refrigerant is charged and the dry state of the refrigerant by color change, and the economize 118 expands the heating refrigerant in the liquid state as the expansion valve 136. ) And the liquid line 138 are separated to flow, so that the medium temperature medium pressure refrigerant expanded in the expansion valve 136 exchanges heat with the high temperature high pressure refrigerant flowing in the liquid line 138 to circulate into the double pipe 108 in a wet steam state. On the other hand, the high temperature and high pressure refrigerant flowing in the liquid line 138 of the present invention is expanded in the expansion valve 122 is circulated toward the evaporator 124.

At this time, approximately 70% of the refrigerant is sent to the evaporator 124, and approximately 30% of the refrigerant is sent to the double pipe 108 by the opening of the SOL valve 120. In the case of a cooling system, 100% liquid refrigerant is simply passed through the expansion valve 130 to serve as an evaporator (cooling, 110, plate heat exchanger).

The SOL valve 120 of the present invention takes the form of being opened when the heating refrigerant is circulated in the form of a heating effective compression cycle, and serves to send the heating refrigerant to the double pipe 108 to exchange heat in the double pipe 108, or a single stage compression cycle. In the case where the cooling refrigerant is circulated in the form, it may serve to block the supply of the cooling refrigerant to prevent heat exchange in the double pipe 108.

The expansion valve 122 of the present invention serves to control the flow rate of the cooling refrigerant and adiabatic expansion, and the evaporator 124 converts the refrigerant in the low pressure liquid state circulated in the form of a heating effective compression cycle into the refrigerant in the low pressure gas state. It plays a role. The evaporator 124 serving as this may be replaced by a condenser 124 for converting a hot gas state into a hot liquid state for the cooling refrigerant circulating in a cooling single stage compression cycle.

It serves to convert the low pressure liquid state of the cooling refrigerant circulating in the form of a heating refrigerant or a cooling single stage compression cycle into a low pressure gas state.

The auxiliary tank 126 of the present invention serves to supply the solar heat to the auxiliary heat source in order to make the refrigerant circulating in the heating effective compression cycle to the saturated or superheated steam to make the heating refrigerant whose discharge temperature is lowered by the outside air as the saturated or superheated steam. In addition, it serves to supply water to make cold water as a heat source to exchange heat with the circulating refrigerant in the form of a cooling single stage compression cycle.

As a result, in the present exemplary embodiment, the discharge disadvantage of the compressor 102 is lowered by the outside air when the heating cycle is operated, thereby partially compensating for the stable operation.

The liquid separator 128 of the present invention serves to separate the refrigerant liquid sent from the auxiliary tank 126 and the four sides 106 so that only the refrigerant gas is sucked into the compressor 102.

The heating refrigerant made of saturated or superheated steam is stored and sent to the compressor 102 or the refrigerant heat-exchanged by the water sent from the auxiliary tank 126 and the four sides 106 is stored and sent to the compressor 102.

On the other hand, the double pipe 108 of the present invention in order to efficiently heat exchange the refrigerant circulating in the heating effective compression cycle, or to suppress the heat exchange during the refrigerant circulation in the form of a cooling single stage compression cycle, the four sides 106 and the condenser 110 And between the compressor 102 and the SOL valve 120, the auxiliary tank 126 of the present invention is supplied to the auxiliary heat source of the refrigerant circulating in the heating effective compression cycle or of the refrigerant circulating in the cooling single stage compression cycle. By forming a structure for supplying water to the auxiliary heat source, it is possible to increase the discharge temperature of the refrigerant, and to operate stably in combination with heating and cooling even when the outside air temperature decreases.

Hereinafter, the circulation form of a heating effective compression cycle and a cooling single stage compression cycle is demonstrated.

Heating effect compression cycle

2 is a diagram illustrating a refrigerant flow circulating in the form of a heating effective compression cycle of the heat pump system 100 according to an embodiment of the present invention.

Referring to Figure 2, the flow of the refrigerant circulating in the heating effective compression cycle of the heat pump system 100 according to an embodiment of the present invention is a compressor 102-> oil separator 104-> four sides 106- > Double tube (108)-> Plate heat exchanger (condenser, 110)-> Infusion machine (112)-> Filter drier (114)-> Sight glass (116)-> Economize (118, SOL valve 120 at the same time) Opening, expansion valve 136, refrigerant circulation into double pipe 108)-> expansion valve 122-> evaporator 124-> auxiliary tank 126 (solar supply)-> four sides 106-> liquid separator ( 128)-> By circulating in the order of the compressor 102, it is possible to obtain hot water as a heat source in the condenser 110.

At this time, the refrigerant heat-exchanged in the economizing 118 circulating in the heating effective compression cycle is the expansion valve 122, the evaporator 124, the auxiliary tank 126, the four sides 106, the liquid separator 128 and the compressor 102 ), The medium temperature medium pressure refrigerant, which is expanded in the expansion valve 136 by the opening of the SOL valve 120 located at the front end of the economize 118, flows through the liquid line 138 through Heat exchange with the high-pressure refrigerant to circulate to the double pipe (108) in the wet steam state.

At this time, if the discharge temperature of the compressor 102 is low, the solenoid valve 132 is below the temperature specified by the refrigerant discharge temperature sensor 140 of the compressor 102 to open the solenoid valve 132, the solenoid valve 134 ) Is closed and the solenoid valve 132 is closed and the solenoid valve 134 is opened when the temperature is higher than the specified temperature.

In other words, the double pipe 108 of the present invention is located between the four sides 106 and the condenser 110 and between the compressor 102 and the SOL valve 120, the refrigerant for heating circulated through the economize 118 And the opening of the SOL valve 120 has a great advantage in supplying the compressor 102 to heat the refrigerant circulated in the sight glass 116 to increase the discharge temperature. This double tube 108 may be replaced with a plate heat exchanger.

On the other hand, the auxiliary tank 126 of the present invention is located between the four sides 106 and the evaporator 124 by using solar heat as an auxiliary heat source to make the refrigerant circulating in the heating effective compression cycle saturated or superheated steam, The stable evaporation of the heat source of 102 is enabled.

Cooling single stage compression cycle

3 is a view exemplarily showing a refrigerant flow circulating in the form of a cooling single stage compression cycle of the heat pump system 100 according to an embodiment of the present invention.

3, the flow of the refrigerant circulating in the cooling single stage compression cycle of the heat pump system 100 according to an embodiment of the present invention is a compressor (102)-> oil separator (104)-> four sides (106)- > Auxiliary tank (126)-> Condenser (124)-> Fluid receiver (112)-> Filter drier (114)-> Sight glass (116)-> Economize (118)-> Expansion valve (130)-> Plate type Heat exchanger (evaporator (cooling), 110)-> double pipe 108-> four sides 106-> liquid separator 128-> compressor 102 in the order of circulation. Reference numeral 124 may be a condenser for cooling or an evaporator for heating. The expansion edge 130 plays the same role as the reference numeral 122.

At this time, the auxiliary tank 126 supplies water to the auxiliary heat source, blocks the SOL valve 120 located between the sight glass 116 and the economize 118, the economize 118 and the double pipe 108 By just passing the refrigerant through without heat exchange in the), it is possible to effectively obtain the cold water as the heat source in the evaporator (124).

Meanwhile, the heat pump system of the present invention can also be used for cooling and heating by direct contact with air by installing an air conditioner without using the plate heat exchanger (condenser 110) described in FIGS. 2 and 3. The air-cooled coils (evaporator (heating, 124) and condenser (cooling, 124)) may be replaced with water-cooling heat exchangers.

In addition, an auxiliary tank 126 for supplying solar heat or water may be installed at the rear end of the air-cooled coil (evaporator (heating, 124) and condenser (cooling, 124)), the economize 118 is plate-shaped It may be transformed into a container type in the form of an intermediate cooler rather than a heat exchanger.

As described above, although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains without departing from the technical spirit or essential features of the present invention in other specific forms. It will be appreciated that it can be done. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

100: heat pump system 102: compressor
104: oil separator 106: four sides
108: double pipe 110: condenser (heating), evaporator (cooling)
112: receiver 114: filter drier
116: sight glass 118: econoise
120: SOL valve 122: expansion valve
124: evaporator (heating), condenser (cooling) 126: auxiliary tank
128: heat receiver 130: expansion valve
132: solenoid valve 134: solenoid valve
136: expansion valve 138: liquid line
140: refrigerant discharge temperature detection sensor of the compressor

Claims (7)

A heat pump system that combines heating and cooling by circulating refrigerant in the form of a heating effective compression cycle and a cooling single stage compression cycle,
An auxiliary tank located between the four sides and the evaporator to supply solar heat to the auxiliary heat source to make the refrigerant circulating in a heating effective compression cycle into saturated or superheated steam; And
Located between the four sides and the condenser and between the compressor and the SOL valve, the compressor to heat the refrigerant circulated through the sight glass by opening the SOL valve and the refrigerant circulated through the economization to increase the discharge temperature Pipe supplied with
Heat pump system comprising a. The method of claim 1,
The refrigerant circulating in the heating effective compression cycle,
Compressor, oil separator, four sides, double pipe, plate heat exchanger (condenser), receiver, filter dryer, sight glass, economize, expansion valve, evaporator, auxiliary tank, four sides, liquid separator, compressor The heat pump system, characterized in that to obtain hot water as a heat source in the condenser. The method of claim 2,
A solenoid valve is further disposed between the liquid separator and the compressor, and when the discharge detection sensor is further disposed between the compressor and the oil separator, the solenoid valve is opened and closed according to whether the discharge detection sensor senses the temperature. The heat pump system. The method of claim 1,
The auxiliary tank,
Supplying water to the heat source to heat exchange with the refrigerant in circulation in the form of the cooling single stage compression cycle,
The heat pump system, characterized in that for blocking the SOL valve to pass through the refrigerant circulating in the form of the cooling single stage compression cycle without heat exchange between the economize and the double pipe. The method of claim 4, wherein
The refrigerant circulating in the cooling single stage compression cycle form,
Circulate in the order of compressor, oil separator, four sides, auxiliary tank, condenser, receiver, filter dryer, sight glass, economize, expansion valve, plate heat exchanger (evaporator), double pipe, four sides, liquid separator, compressor, The auxiliary pump supplies water to an auxiliary heat source, and shuts off the SOL valve so that the refrigerant passes through the economizer and the double pipe, thereby obtaining cold water as a heat source in the evaporator. . 6. The method according to claim 2 or 5,
The evaporator and the condenser, the heat pump system, characterized in that for applying any one selected from the air-cooled heat exchanger and the water-cooled heat exchanger. The method according to any one of claims 1 to 5,
The economize is characterized in that the heat pump system is further produced in the form of a container type of the intermediate cooler type.

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