KR101177474B1 - High efficiency heat pump system - Google Patents

Abstract

The present invention relates to a heat pump system, and more particularly, to a high-efficiency heat pump system capable of reducing costly heating and cooling costs and realizing excellent cooling and heating efficiency. The present invention is a high efficiency heat pump system for performing cooling or heating operation according to the cooling and heating cycle provided by the four-way valve connected to the compressor, connected to the four-way valve and the connecting pipe, the refrigerant compressed in the compressor is introduced A first heat exchanger performing a condensation stroke during the cooling operation and an evaporation stroke during the heating operation; An ice storage tank configured to freeze the outside of the tube by evaporating and expanding the refrigerant transferred through the reverse valve and the receiver connected to the first heat exchanger through a receiver; A heater for heating the compressed refrigerant flowing through the connecting pipe connected to the compressor, the oil separator, and the four-way valve in order to be heated at a specific temperature or more during a heating operation; A second heat exchanger performing heat exchange between the refrigerant heated by the heater and the heating water by performing a condensation stroke during the heating operation; And a third heat exchanger configured to perform a condensation process on the refrigerant heated by the second heat exchanger during the heating operation to supply a heat source to the first heat exchanger, and to transfer the refrigerant to the first heat exchanger. 2, to provide a high-efficiency heat pump system using a bypass tube and an electronic control valve so that the refrigerant is not transferred to the third heat exchanger side, and the refrigerant is not transferred to the ice storage tank during the heating operation.

Description

High efficiency heat pump system {HIGH EFFICIENCY HEAT PUMP SYSTEM}

The present invention relates to a heat pump system, and more particularly, to a high-efficiency heat pump system capable of reducing costly heating and cooling costs and realizing excellent cooling and heating efficiency.

In general, the heat pump is a device that is applied to the heat pump type air conditioner to absorb heat from the outside or to release the heat to the outside to cool and heat the room to maintain a comfortable indoor environment.

According to the heat pump, both heating and cooling can be performed in one unit (or system) by switching the refrigerant cycle, thereby providing an economical advantage when separately installing the heating device and the cooling device.

Current cold / hot water heat pump systems often adopt electric assisted heating regardless of energy saving effect or stability of machine operation, which causes winter low pressure failure and summer high pressure failure. In addition to being in the 3rd range, the use of energy sources is only about 50%.

Recently, the low-cost heating and cooling means are emerging in the context of rising prices of fossil energy and the high costs associated with them.

However, in the case of conventional heat pumps, the production of cooling water is about 7 ° C-12 ° C, and the production of 45 ° C-50 ° C for heating water is mostly used in commercially available heat pump systems. Possible, but there is a problem that the efficiency is lowered in the case of heating.

Therefore, the heat pump water heater unit currently in use does not meet the urgent demand for energy saving due to high oil prices and resource depletion. In particular, the efficiency of the heat pump is low in winter, when heating demand is high. It is urgent to supply high efficiency heat pump systems that operate.

The present invention has been made in view of the above problems, and an object thereof is to provide a high-efficiency heat pump system capable of reducing high-cost cooling and heating costs and realizing excellent cooling and heating efficiency.

Another object of the present invention is to perform the cooling cycle by storing the ice heat in the ice storage tank in the ice form using the night time electricity during cooling, and to improve the mechanical stability by performing the heating cycle through the heat exchanger and the secondary first heat exchanger during heating. To provide a high efficiency heat pump system.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

High efficiency heat pump system according to an aspect of the present invention for achieving the above object, in the high efficiency heat pump system to perform the cooling or heating operation in accordance with the cooling and heating cycle provided by the four-way valve connected to the compressor, four-way valve A first heat exchanger connected to a connection pipe and configured to flow a refrigerant compressed by a compressor to perform a condensation stroke during a cooling operation and to perform an evaporation stroke during a heating operation; An ice storage tank configured to freeze the outside of the tube by evaporating and expanding the refrigerant transferred through the reverse valve and the receiver connected to the first heat exchanger through a receiver; A heater for heating the compressed refrigerant flowing through the connecting pipe connected to the compressor, the oil separator, and the four-way valve in order to be heated at a specific temperature or more during a heating operation; A second heat exchanger performing heat exchange between the refrigerant heated by the heater and the heating water by performing a condensation stroke during the heating operation; And a third heat exchanger configured to perform a condensation process on the refrigerant heated by the second heat exchanger to supply a heat source to the first heat exchanger, and to transfer the refrigerant to the first heat exchanger.

Preferably, the second heat exchanger is characterized in that it is possible to obtain a heating water of 70 ℃ or more heating water of 60 ℃ by performing heat exchange between the heated refrigerant and the heating water.

The present invention by the above-mentioned problem solving means can obtain the temperature of the heating and cooling water more improved than the existing heat pump and there is an effect that can also obtain the stability of the system.

In addition, it has an excellent heating and cooling effect, and has the effect of reducing cooling and heating costs.

In addition, the heating water temperature of the existing heat pump system is 45 ℃-50 ℃ (△ + 5 ℃) high efficiency heat pump system according to the present invention can be implemented up to 45 ℃-70 ℃ (△ + 25 ℃) and winter It can be used stably in the environment of -10 ℃, and has the effect of increasing user convenience.

In addition, the cooling water temperature of the existing heat pump system is 7 ℃-12 ℃ high efficiency heat pump system according to the present invention is very cold cooling water to 0 ℃-12 ℃ (△ + 12 ℃) by using a separate ice storage tank It can be used to realize a very superior performance than the cooling performance of the conventional heat pump system.

1 is a configuration for explaining the cooling operation of the high efficiency heat pump system according to an embodiment of the present invention.
FIG. 2 is a detailed view of the check valve in FIG. 1; FIG.
Figure 3 is a block diagram for explaining the heating operation of the high efficiency heat pump system according to an embodiment of the present invention.

In the following description specific details of the high efficiency heat pump system of the present invention are presented to provide a more comprehensive understanding of the present invention, which is understood that the present invention may be readily practiced without these specific details and by modification thereof. It will be apparent to those of ordinary skill in the art.

In the following description, first, the cooling operation of the high efficiency heat pump system according to the present invention will be described, and the heating operation will be described.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings, with reference to the parts necessary for understanding the operation and operation according to the present invention. For reference, arrows shown in the accompanying drawings of the present invention indicate the refrigerant flow of cooling and heating.

The drawings related to the cooling operation in the accompanying drawings of the present invention do not show a heater, a second heat exchanger, and a third heat exchanger which operate only during the heating operation to help understanding the operation of the cooling operation. To this end, by using a bypass tube and an electronic control valve so that refrigerant does not flow into the components operating during the heating operation.

In addition, the drawings related to the heating operation has shown a heater, a second heat exchanger, a third heat exchanger that is operated during the heating operation in addition to the drawings for explaining the cooling operation to help understanding according to the operation of the heating operation.
In addition, a plurality of electronic control valve (check valve) means are provided on the refrigerant circuit to which the heater, the first heat exchanger, the second heat exchanger, the third heat exchanger, the ice storage tank, and the like belong, so that the flow of the refrigerant is heated and It can be appropriately controlled according to each operating condition at the time of cooling.

Thus, it should be noted that the heat exchanger and the heater are omitted in FIG. 1 for the description of the cooling operation.

1 is a configuration for explaining the cooling operation of the high efficiency heat pump system according to an embodiment of the present invention.

Referring to Figure 1, the high efficiency heat pump system 100 for performing the cooling operation according to the present invention is a compressor (11), oil separator (13), four-way valve (4-way valve, four sides) (a), 1 Heat exchanger (at the time of cooling: operates as a first heat exchanger (condenser)) 16, check valve (check valve) 17, receiver 19, first expansion valve 21, ice tank 23 And a liquid separator 25.

Looking at the cooling operation through the configuration of the high-efficiency heat pump system 100, first, the cooling cycle is the compressor (11)-> oil separator (13)-> four-way valve (a)-> first heat exchanger ( 16)-> Reverse valve (17)-> Receiver (19)-> Reverse valve (17)-> First expansion valve (21)-> Ice tank (a)-> River valve ( a)-> Circuit separator (25)-> Compressor (11).

The compressor 11 is a refrigerant compressor having a gas inlet and outlet having a function of compressing a low temperature low pressure refrigerant into a high pressure high pressure gas.

The oil separator 13 separates and recovers the compressor oil contained in the refrigerant of the high pressure high pressure gas input from the compressor 11, and collects the high pressure high pressure gas obtained by recovering the oil through the four-way valve (a). It is provided to the group 16 side.

Here, the four-way valve (a) performs a valve operation corresponding to the cooling path and the heating path in accordance with the cooling cycle and the heating cycle.

The first heat exchanger 16 converts the refrigerant of the high pressure and high pressure gas into the refrigerant of the low temperature and high pressure through the oil separator 13.

The reverse valve 17 is a connection pipe (flow) to transfer the low-temperature, high-pressure refrigerant flowing from the first heat exchanger 16 to the receiver 19 to be transferred to the expansion valve 21 and the ice storage tank (23). To provide. Here, the detailed configuration of the check valve 17 is as shown in FIG.

The receiver 19 temporarily stores the coolant of the low temperature and high pressure cooled by the first heat exchanger 16 and then supplies the refrigerant to the first expansion valve 21 through a heat exchanger.

The first expansion valve 21 injects the refrigerant supplied from the receiver 19 into the inner tube of the ice storage tank (evaporator) 23 for obtaining cooling heat.

In the evaporator 23 installed in the ice storage tank, the ice storage tank (evaporator) 23 vaporizes and expands the refrigerant injected by the first expansion valve 21 to freeze ice on the outside of the tube to form ice required for cooling. 12 ° C. available) The refrigerant vaporized and expanded by this ice storage tank 23 is transferred to the liquid separator 25 through the four-way valve (a).

Since the liquid separator 25 may contain water in the refrigerant expanded by the ice storage tank 23, the liquid separator 25 transfers the refrigerant from which the water is separated to the compressor 11 through a pipe connected to the compressor 11.

With reference to Figure 1 will be described in detail the operation and operation of the cooling operation of the high-efficiency heat pump system 100 according to the present invention described above.

The high temperature and high pressure refrigerant compressed by the compressor (11) is sent to the oil separator (13), and after the oil is removed, the refrigerant is sent to the first heat exchanger (16) through the four-way valve (a) to make a low temperature and high pressure refrigerant state by the condensation process. It is sent to the receiver 19 through the valve 21, temporarily stored and stored and then sent to the expansion valve (21). The receiver 19 here also serves to recover the compressor oil secondaryly.

Then, the expansion valve 21 injects the refrigerant into the evaporation coil tube in the ice storage tank 23, expands and vaporizes to create cooling heat necessary for the load side, and at the same time, exchanges cooling water with the load side to realize cooling. The temperature of the cold water produced at this time is 0 ℃-12 ℃.

Next, the heating operation of the heating cycle reversely circulated with the cooling cycle of the above-described cooling operation will be described.

3 is a configuration diagram for explaining the heating operation of the high efficiency heat pump system according to an embodiment of the present invention.

Referring to Figure 3, the high-efficiency heat pump system 100 to perform the heating operation according to the present invention is a compressor 11, oil separator 13, four-way valve (4-way valve, four sides) (a), heater 31, the second heat exchanger 33, the third heat exchanger 35, the check valve (check valve) 17, the receiver 19, the second expansion valve 37, the first heat exchanger 16 ), The ice storage tank 23 and the liquid separator 25 are configured.

First, the high efficiency heat pump system according to the present invention should perform the heating operation through the heating cycle of the reverse circulation and the cooling cycle of the cooling operation.

To this end, the four-way valve (a) and the reverse valve 17 is provided to selectively block and open the transfer path to provide a heating cycle of the reverse circulation of the cooling cycle.

Thus, the heating cycle of the compressor (11)-> oil separator (13)-> four-way valve (a)-> heater (31)-> second heat exchanger (33)-> third heat exchanger (35) )-> Reverse valve (17)-> Receiver (19)-> Secondary expansion valve (37)-> First heat exchanger (16)-> Square valve (a)-> Liquid separator ( 25)-> Compressor (11).

Looking at the heating operation through the configuration of the high-efficiency heat pump system 100, first, the operation and action of each component described in the cooling operation performs the same function even during the heating operation.

However, the first heat exchanger 16 (operating as an evaporator when heating) performs a condensation process by operating as a first heat exchanger (condenser) during cooling operation, but operates as an evaporator when heating.

In addition, the heater 31 operating during the heating operation is a device for heating the refrigerant compressed by the compressor 11 once more, so that the temperature of the refrigerant is 120 ° C. or more.

The second heat exchanger 33 performs heat exchange between the refrigerant heated in the heater 31 and the heating water to obtain heating water that rises above a predetermined temperature. As a result, the temperature of the heating water can be increased from 60 deg. C to 70 deg. C and supplied to the load side.

The third heat exchanger 35 supplies heat to the first heat exchanger 16 to allow continuous heating operation and at the same time to defrost ice generated around the first heat exchanger 16 performing the operation of the evaporator. Perform the function.

Referring to Figure 3 will be described in detail the operation and operation of the heating operation of the high-efficiency heat pump system 100 according to the present invention described above.

The high temperature and high pressure refrigerant compressed by the compressor (11) is sent to the oil separator (13), and after oil removal, the refrigerant is transferred to the heater (31) through the four-way valve (a). Then, the heater 31 heats the refrigerant once more so that the temperature of the refrigerant compressed by the compressor 11 is equal to or higher than a predetermined temperature (eg, 120 ° C.), and then sends it to the second heat exchanger 25 to condense the primary. By the process, the refrigerant is made into a low-temperature high-pressure refrigerant state and transferred to the third heat exchanger 35.

At this time, when the heating water on the load side is flowed to the second heat exchanger 25 to perform heat exchange, heating water of 70 ° C. or more can be obtained.

Thereafter, the third heat exchanger 35 performs a condensation process secondarily to supply a heat source to the first heat exchanger 16 and to transfer the refrigerant to the reverse valve 17. This freezes the first heat exchanger 16 and enables continuous heating operation.

The reverse valve 17 provides a transfer path for the refrigerant to flow into the receiver 19, and is then transferred to the second expansion valve 37 through the reverse valve 17 through the dryer and the intermediate valve.

Accordingly, the refrigerant supplied to the second expansion valve 37 injects the refrigerant into the inner tube of the first heat exchanger 16 to obtain cooling heat.

The first heat exchanger 16 then performs an evaporation stroke to vaporize and expand the refrigerant. At this time, the first heat exchanger 16 is supplied with the necessary heat source from the third heat exchanger 35 to enable continuous and stable expansion of the refrigerant.

Thereafter, the expanded refrigerant is transferred to the liquid separator 25 by the transfer path to the four-way valve a, and the water contained in the expanded refrigerant is separated by the liquid separator 25, and the refrigerant from which the water is separated is compressed into a compressor ( To 11).

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Claims (2)

In the high efficiency heat pump system to perform cooling or heating operation according to the cooling and heating cycle provided by the four-way valve connected to the compressor,
A first heat exchanger connected to the four-way valve and the connection pipe, the refrigerant compressed in the compressor is introduced to perform a condensation stroke during the cooling operation, and perform an evaporation stroke during the heating operation;
An ice storage tank configured to freeze the outside of the tube by evaporating and expanding the refrigerant transferred through the reverse valve and the receiver connected to the first heat exchanger through a receiver;
A heater for heating the compressed refrigerant flowing through the connecting pipe connected to the compressor, the oil separator, and the four-way valve in order to be heated at a specific temperature or more during a heating operation;
A second heat exchanger performing heat exchange between the refrigerant heated by the heater and the heating water by performing a condensation stroke during the heating operation; And
And a third heat exchanger configured to perform a condensation process on the refrigerant heated by the second heat exchanger to supply a heat source to the first heat exchanger, and to transfer the refrigerant to the first heat exchanger.
The method of claim 1, wherein the second heat exchanger,
A high-efficiency heat pump system, characterized in that to perform a heat exchange between the heated refrigerant and the heating water to obtain a heating water of 60 ℃ or more heating water of 60 ℃.

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