KR102410830B1 - A heat-pump system for preventing efficiency decline of heat-pump in freeze-up weather - Google Patents

Abstract

The present invention relates to a heat pump that has both cooling and heating functions. In order to improve the disadvantage that the heat pump efficiency (compression efficiency) decreases in winter when the external temperature drops rapidly, such as in severe cold, the low temperature introduced into the compressor after being used for heating / An invention that increases the compression efficiency of a heat pump by heating low-pressure gas to a certain temperature using an auxiliary heat source and then supplying it to a compressor characterized in that

Description

A heat-pump system for preventing efficiency decline of heat-pump in freeze-up weather

The present invention relates to a heat pump system that prevents a decrease in the efficiency of a heat pump during a cold season, and more particularly, in a heat pump having both cooling and heating functions, in heating mode, generating heating water using a heat source for heating, and in cooling mode Cooling water is generated using refrigerant, and low-temperature/low-pressure gas that flows into the compressor after being used for heating is used for heating to improve the disadvantage that the heat pump efficiency (compression efficiency) decreases in winter when the external temperature drops rapidly, such as in severe cold. It relates to a technology for increasing the compression efficiency of a heat pump by heating it to a certain temperature using an auxiliary heat source and supplying it to a compressor.

Recently, for cooling and heating, heat pumps for heating and cooling have been widely used because of low environmental pollution and low electricity consumption, which has excellent energy saving properties.

Heat pumps for heating and cooling have the advantage that they can be used for both cooling and heating devices, and typical home appliances that use a combined heating and cooling heat pump include heaters, refrigerators, and air conditioners.

Heat pumps for heating and cooling use the high-temperature/high-pressure gas generated by the compressor as a heat source for generating heating water during heating. It is a device used as a refrigerant required to generate cooling water.

The conventional heat pump for heating and cooling has the advantage of excellent energy saving due to less environmental pollution and less electricity consumption, but has a disadvantage in that the efficiency of the heat pump rapidly decreases when the external temperature is low, such as during a severe cold in winter.

Therefore, in order to solve the conventional problems, the present invention generates heating water using a heat source for heating in the heating mode, and generates cooling water using a refrigerant in the cooling mode, and in winter when the external temperature rapidly drops such as in severe cold. To improve the disadvantage of low heat pump efficiency (compression efficiency), the low-temperature/low-pressure gas flowing into the compressor after being used for heating is heated to a certain temperature using an auxiliary heat source and then supplied to the compressor to improve the compression efficiency of the heat pump. We would like to propose a technique to elevate it. The following are prior art related to this.

1. Republic of Korea Patent Publication No. 10-1454558 Heat pipe heat exchanger with double electrode and electric boiler using same 2. Republic of Korea Patent Publication No. 10-1516882 Hybrid Heat Pump Boiler System

An object of the present invention is to generate heating water using a heat source for heating in a heating mode, and generate cooling water using a refrigerant in a cooling mode.

In addition, in order to improve the disadvantage that the heat pump efficiency (compression efficiency) decreases in winter when the external temperature drops rapidly, such as in severe cold, the low-temperature/low-pressure gas flowing into the compressor after being used for heating is used as an auxiliary heat source. It aims to increase the compression efficiency of the heat pump by heating it to a certain temperature and then supplying it to the compressor.

In order to achieve the above object, the heat pump system of the present invention,

In the heating mode according to the control of the controller 300, the heating and cooling water processing unit 200 heats the supplied water to supply the heating water to the heating and cooling water processing unit 200, and in the cooling mode according to the control of the controller 300, a heat pump unit 100 for cooling the water supplied by the heating/cooling water treatment unit 200 and supplying cooling water to the cooling/heating water treatment unit 200;

a heating/cooling water treatment unit 200 that supplies the supplied water to the heat pump unit 100 and supplies heating or cooling water supplied by the heat pump unit 100 to an external user;

When the user selects the heating mode, the heat pump unit 100 controls to operate in the heating mode, and when the user selects the cooling mode, the controller 300 controls the heat pump unit 100 to operate in the cooling mode. characterized in that

The present invention provides an effect of generating heating water using a heat source for heating in a heating mode, and generating cooling water using a refrigerant in a cooling mode to serve as both heating and cooling with one heat pump system.

In addition, in order to improve the disadvantage that the heat pump efficiency (compression efficiency) falls in winter when the external temperature drops rapidly, such as in severe cold, the low-temperature/low-pressure gas flowing into the compressor after being used for heating is constant using an auxiliary heat source. After heating to temperature, it is supplied to the compressor to increase the compression efficiency of the heat pump, so it can be used even in the cold season without reducing the efficiency.

1 is an overall configuration diagram of the present invention;
2 is a block diagram of the present invention;
3 is a structural diagram of a first heat exchanger of the present invention;
4 is a structural diagram of a second heat exchanger of the present invention;
5 is a cooling mode control state diagram of the present invention;
6 is a heating mode control state diagram of the present invention;
7 is a cold control state diagram of the present invention
8 is a state diagram of the hot water mode control of the present invention;

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present inventor's heat pump system (hereinafter 'the present invention') for preventing a decrease in heat pump efficiency during cold season generates heating water using a heat source for heating in heating mode, and generates cooling water using a refrigerant in cooling mode to generate one heat Low-temperature/low-pressure gas that flows into the compressor after being used for heating in order to improve the effect that the pump system can serve as both heating and cooling and the disadvantage that the heat pump efficiency (compression efficiency) decreases in winter when the external temperature drops rapidly such as in severe cold It is an invention that provides an effect that can be used without a decrease in efficiency even in a cold season because it is heated to a certain temperature using an auxiliary heat source and then supplied to a compressor to increase the compression efficiency of the heat pump. 100), the heating and cooling water treatment unit 200, characterized in that it includes a controller (300).

Specifically, the heat pump system for preventing a decrease in the efficiency of the cold season heat pump of the present invention,

In the heating mode according to the control of the controller 300, the heating and cooling water processing unit 200 heats the supplied water to supply the heating water to the heating and cooling water processing unit 200, and in the cooling mode according to the control of the controller 300, a heat pump unit 100 for cooling the water supplied by the cooling/heating water treatment unit 200 and supplying cooling water to the cooling/heating water treatment unit 200;

a heating/cooling water treatment unit 200 that supplies the supplied water to the heat pump unit 100 and supplies heating or cooling water supplied by the heat pump unit 100 to an external user;

When the user selects the heating mode, the heat pump unit 100 controls to operate in the heating mode, and when the user selects the cooling mode, the controller 300 controls the heat pump unit 100 to operate in the cooling mode. characterized in that

Referring to FIG. 1 , the heat pump unit 100 heats the water supplied by the heating and cooling water processing unit 200 in the heating mode under the control of the controller 300 and supplies the heating water to the heating and cooling water processing unit 200 . and, in the cooling mode according to the control of the controller 300, cooling the water supplied by the heating and cooling water processing unit 200 to supply cooling water to the cooling and cooling water processing unit 200. Specifically, as shown in FIG. As,

A compressor 110 that compresses low-temperature/low-pressure gas to generate high-temperature/high-pressure gas;

In the heating mode under the control of the controller 300 , the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the first heat exchanger 131 , and the low-temperature/low-pressure gas supplied from the radiator 140 is compressed In the cooling mode under the control of the controller 300, the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the radiator 140 and supplied from the first heat exchanger 131. A four-way valve 121 for supplying low-temperature/low-pressure gas to the compressor 110, and

In the heating mode under the control of the controller 300, the water supplied from the heating and cooling water treatment unit 200 is heated using the high-temperature/high-pressure gas supplied from the four-way valve 121, and the high-temperature/high-temperature/ High-pressure gas is provided to the expansion valve 150, and in the cooling mode, the water supplied from the heating and cooling water treatment unit 200 is cooled using the low-temperature/low-pressure gas supplied from the expansion valve 150, and through the cooling process a first heat exchanger 131 for supplying a low-temperature/low-pressure gas whose temperature has risen to the four-way valve 121;

In the heating mode, the low-temperature/low-pressure gas supplied from the expansion valve 150 is supplied to the four-way valve 121 by increasing the temperature using the ambient temperature, and in the cooling mode, the high-temperature/high pressure gas supplied from the four-way valve 121 is supplied. A radiator 140 for supplying the gas to the expansion valve 150 by lowering the temperature using the ambient temperature;

In heating mode, high-temperature/high-pressure gas supplied from the first heat exchanger 131 is expanded to generate low-temperature/low-pressure gas, and the generated low-temperature/low-pressure gas is supplied to the radiator 150, and in cooling mode , by expanding the high-temperature/high-pressure gas supplied from the radiator 150 to generate low-temperature/low-pressure gas, and an expansion valve 150 for supplying the generated low-temperature/low-pressure gas to the first heat exchanger 131 . characterized in that

The compressor 110 is configured to generate high-temperature/high-pressure gas by compressing low-temperature/low-pressure gas. The generated high-temperature/high-pressure gas is delivered to the four-way valve 121, and then a heating heat source for generating heating water. It is supplied from the four-way valve 121 to the first heat exchanger 131 to be used as an air conditioner, or is supplied to the radiator 140 from the four-way valve 121 to generate refrigerant for cooling water generation.

The high temperature/high pressure gas temperature generated by the compressor 110 is generally 80° C. or higher (80 to 90° C.), and the high temperature/high pressure gas 80° C. or higher is transferred from the compressor 110 to the four-way valve 121 side. . The gas used for compression in the compressor 110 may be a Freon gas or a gas other than Freon.

The four-way valve 120 transmits the high-temperature/high-pressure gas generated in the compressor 110 to the first heat exchanger 131 or the radiator 140 according to the heating mode or the cooling mode, so as to be used for heating for generating heating water. It is a directional control valve that switches the supply direction of high-temperature/high-pressure gas according to the control of the controller 300 so that it can be used as a heat source or a refrigerant for generating cooling water.

Specifically, the four-way valve 120 supplies the high-temperature/high-pressure gas generated by the compressor 110 to the first heat exchanger 131 in the heating mode under the control of the controller 300, and in the radiator 140 The supplied low-temperature/low-pressure gas is supplied to the compressor 110, and in the cooling mode under the control of the controller 300, the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the radiator 140, 1 The low-temperature/low-pressure gas supplied from the heat exchanger 131 is supplied to the compressor 110 .

That is, when the four-way valve 120 is in the heating mode under the control of the controller 300, the high-temperature/high-pressure gas generated by the compressor 110 is used as a heat source for heating for generating heating water. High-temperature/high-pressure gas is supplied to the first heat exchanger 131 , and the high-temperature/high-pressure gas used as a heat source for heating in the first heat exchanger 131 passes through an expansion valve 150 and a radiator 140 to be described later. When the low-temperature/low-pressure gas is circulated and returned, the low-temperature/low-pressure gas returned to the circulation is supplied back to the compressor 110 so that the low-temperature/low-pressure gas is used for generating the high-temperature/high pressure gas.

In addition, the four-way valve 120 is configured to convert the high-temperature/high-pressure gas generated by the compressor 110 into a refrigerant for cooling water generation in the cooling mode under the control of the controller 300 , the high temperature generated by the compressor 110 . / High-pressure gas is supplied to the radiator 140, and the high-temperature/high-pressure gas is converted into low-temperature/low-pressure gas through the expansion valve 150 and the radiator 140 to be described later, and the low-temperature/low-pressure gas is the first It is used as a refrigerant for generating cooling water in the heat exchanger 131 . When the low-temperature/low-pressure gas used as a refrigerant in the first heat exchanger 131 circulates and returns, the four-way valve 120 circulates the low-temperature/low-pressure gas so that the low-temperature/low-pressure gas is used for generating high-temperature/high-pressure gas. The gas is fed back to the compressor 110 .

The first heat exchanger 131 is configured to generate heating water using high-temperature/high-pressure gas in the heating mode and to generate cooling water using low-temperature/low-pressure gas in the cooling mode.

Specifically, as shown in FIG. 3 , the first heat exchanger 131 heats the water supplied from the heating and cooling water treatment unit 200 using the high-temperature/high-pressure gas supplied from the four-way valve 121 in the heating mode. to generate heating water, and supply high-temperature/high-pressure gas used as a heat source for heating water generation (a gas whose temperature has decreased rather than the high-temperature/high-pressure gas supplied from the compressor) to the expansion valve 150, and in cooling mode, The low-temperature/low-pressure gas supplied from the expansion valve 150 is used to cool the water supplied from the heating and cooling water treatment unit 200 to generate cooling water, and the low-temperature/low-pressure gas used as a refrigerant for cooling water generation is discharged from the four-way valve. (121) is supplied.

Referring to FIG. 3 , the first heat exchanger 131 is formed in a double tube type by an external circulation pipe 1311 and an internal circulation pipe 1312 formed inside the external circulation pipe 1311 .

Accordingly, the water supplied from the heating and cooling water treatment unit 200 flows through the external circulation pipe 1311, and in the internal circulation pipe 1312, high-temperature/high-pressure gas, which is a heat source for generating heating water, flows through the heating mode in the heating mode. In mode, low-temperature/low-pressure gas, which is a refrigerant for cooling water generation, flows.

Therefore, in the heating mode, the water supplied from the heating and cooling water treatment unit 200 by the high-temperature/high-pressure gas flowing through the internal circulation pipe 1312 and flowing through the external circulation pipe 1311 is heated to generate heating water, and the generated heating water is supplied to the heating and cooling water processing unit 200, and in the cooling mode, the water flowing through the external circulation pipe 1311 is supplied from the heating and cooling water processing unit 200 by the low-temperature/low-pressure gas that is the refrigerant flowing through the internal circulation pipe 1312 This cooling water generates cooling water, and the generated cooling water is supplied to the cooling/heating water treatment unit 200 .

The radiator 140 is a conduit through which a fluid can flow therein, and is configured to lower or raise the temperature of the fluid flowing therein by using the external temperature.

Specifically, in the heating mode, the radiator 140 increases the temperature of the low-temperature/low-pressure gas supplied from the expansion valve 150 using the ambient temperature to supply it to the four-way valve 121, and in the cooling mode, the four-way valve ( 121) is supplied to the expansion valve 150 by lowering the temperature of the gas supplied from the high temperature/high pressure using the ambient temperature.

For example, in the heating mode (winter), low-temperature/low-pressure gas of -15°C or less is supplied from the expansion valve 150, and the low-temperature/low-pressure gas of -15°C or less passes through the radiator 140 while passing through the surrounding area. The temperature rises due to the temperature (eg, a temperature of minus 10°C or higher).

In addition, in the cooling mode (summer), high-temperature/high-pressure gas of 80°C or higher is supplied from the four-way valve 121, and the high-temperature/high-pressure gas of 80°C or higher passes through the radiator 140 at the ambient temperature (eg, 20°C). temperature), the temperature decreases.

The expansion valve 150 (also referred to as capillary expansion tube) expands the high-temperature/high-pressure gas supplied from the first heat exchanger 131 in the heating mode to generate low-temperature/low-pressure gas, and the generated low-temperature/low-pressure gas of gas is supplied to the radiator 140, and in the cooling mode, high-temperature/high-pressure gas supplied from the radiator 140 is expanded to generate low-temperature/low-pressure gas, and the generated low-temperature/low-pressure gas is first heat exchanged It is configured to be supplied to the group 131 .

The expansion valve 150 has a configuration in which a plurality of fine-diameter tubes are formed, and uses a capillary phenomenon to convert high-temperature/high-pressure gas into low-temperature/low-pressure gas.

For example, when the expansion valve 150 is in the heating mode, the high temperature/high pressure gas of 40 to 60° C. supplied from the first heat exchanger 131 used as a heat source for heating to generate heating water is used through capillary action. Make a low-temperature/low-pressure gas of -15°C or less and supply it to the radiator 140, and in cooling mode, 40-60°C high-temperature/high-pressure gas supplied from the radiator 140 is -15°C using capillary action The following low-temperature/low-pressure gas is made to be supplied to the first heat exchanger 131 to be used as a refrigerant for cooling water generation.

The heat pump unit 100 of the present invention heats the antifreeze under the control of the controller 300 and supplies it to the second heat exchanger 132 by heating the inverter-type auxiliary boiler 160 and the heating supplied from the auxiliary boiler 160 . It may further include a second heat exchanger 132 for heating the low-temperature/low-pressure gas supplied from the four-way valve 121 using the antifreeze solution to increase the temperature and supplying the low-temperature/low-pressure gas to the compressor 110 .

When the present invention is configured to further include an inverter-type auxiliary boiler 160 and a second heat exchanger 132 , the four-way valve 121 is a low temperature supplied from the radiator 140 under the control of the controller 300 . / It is characterized in that the low pressure gas is supplied to the second heat exchanger 132 instead of the compressor 110 .

In the above-described heat pump unit 100 of the present invention, in the summer cooling mode, the high-temperature/high-pressure gas generated by the compressor 110 is discharged from the four-way valve 121 → the radiator 140 → the expansion valve 150 → the first heat exchange. Cooling water is generated through the circulation process of the unit 131 → four-way valve 120 → compressor 110 .

In addition, in the winter heating mode, the high-temperature/high-pressure gas generated in the compressor 110 is discharged from the four-way valve 121 → the first heat exchanger 131 → the expansion valve 150 → the radiator 140 → the four-way valve 121. → Generates heating water through the circulation process of the compressor (110).

During the circulation process, in the winter heating mode, the temperature of the low-temperature/low-pressure gas supplied from the expansion valve 140 to the radiator 140 is generally about -15 to -30°C, and a low temperature of about -15 to -30°C. / The low-pressure gas passes through the radiator 140 and absorbs heat from the outside air to reach the target temperature (eg 0 ~ -10℃), which is a state in which the temperature has risen, and passes through the four-way valve 120 to the compressor 110 is supplied with

However, in the case of a cold season when the external temperature is low (eg, when the external temperature is -15°C or less), the low-temperature/low-pressure gas (low-temperature/low-pressure gas of about -15 to -30°C) passing through the radiator 140 is The heat absorption from the air is small (the colder the outside air, the smaller the heat absorption) is lower than the target temperature (eg 0 ~ -10℃) (eg -15 ~ -20℃) via the four-way valve 121 It is supplied to the compressor (110).

In general, when the temperature of the compression target gas supplied to the compressor 110 is higher than the target temperature (eg, 0 to -10°C), normal compression efficiency occurs. That is, in order for the compressor 110 to perform a normal compression operation, the temperature of the compression target gas flowing into the compressor must be greater than or equal to the target temperature (eg, 0 to -10°C).

The target temperature refers to the temperature of the low-temperature/low-pressure gas flowing into the compressor 110 so that high-temperature/high-pressure gas can be generated without reduction in compression efficiency.

However, in the case of a cold season, as described above, the temperature of the low-temperature/low-pressure gas supplied to the compressor 110 is below the target temperature (eg, 0 to -10°C), and due to this decrease in compression efficiency, an appropriate high-temperature/high-pressure gas cannot be produced.

Therefore, in order to prevent a decrease in compressor efficiency during the cold season, the low-temperature/low-pressure gas temperature discharged from the radiator 140 and supplied to the compressor 110 via the four-way valve 121 is adjusted to the target temperature (eg 0 ~ -10℃). ) or less, the low-temperature/low-pressure gas is heated to the target temperature (eg, 0 to -10°C) and then supplied to the compressor 110, and the configuration for this is the auxiliary boiler 160 and the second heat exchanger. (132).

Referring to FIG. 1 , the auxiliary boiler 160 heats the antifreeze to a target temperature according to the control of the controller 300 (when the fourth control signal is received from the controller 300 ) to the second heat exchanger 132 . It is an inverter type boiler that supplies.

At this time, the fourth control signal provided from the controller 300 is a control signal for heating the antifreeze to the target temperature, and the target temperature is the low/low pressure gas temperature in the second heat exchanger 132 is the target temperature suitable for compression. It is the heating temperature of the antifreeze required to make it possible.

Accordingly, the auxiliary boiler 160 receiving the fourth control signal from the controller 300 causes the antifreeze to be heated to a target temperature corresponding to the fourth control signal.

The auxiliary boiler 160 is an inverter type, so that the amount of heat generated is controlled by different fourth control signals corresponding to different target temperatures. That is, the amount of heat generated is controlled so that the antifreeze is heated to different target temperatures corresponding to the fourth control signals.

In addition, since the auxiliary boiler 160 is configured to be used in the cold season, if water is used as the heating element, the water may be frozen during the cold season, so an antifreeze that does not freeze even in the cold season is used.

Referring to FIG. 1 , the second heat exchanger 132 uses antifreeze heated to a target temperature supplied from the auxiliary boiler 160 so that the low-temperature/low-pressure gas supplied from the four-way valve 121 becomes the target temperature. is a configuration that

At this time, the second heat exchanger 132 has an external circulation pipe 1321 and an internal circulation pipe 1322 installed inside the external circulation pipe 1321 like the first heat exchanger 131 as shown in FIG. 3 . can be composed of

In this case, the low-temperature/low-pressure gas supplied from the four-way valve 120 flows to the external circulation pipe 1321 , and the heated antifreeze supplied from the auxiliary boiler 160 flows to the internal circulation pipe 1322 , the external circulation pipe The low-temperature/low-pressure gas flowing through 1321 is heated.

In addition, as shown in FIG. 4 , the second heat exchanger 132 includes a first circulation pipe 1321, a second circulation pipe 1322 disposed close to the first circulation pipe 1321, a first circulation pipe ( 1321) and the second circulation pipe 1322 may be composed of a conductive medium 1323 in contact with each other.

In this case, one side of the first circulation pipe 1321 is connected to the four-way valve 121 and the other end is connected to the compressor 110 , and the low-temperature/low-pressure gas supplied from the four-way valve 121 flows, and the second circulation The heated antifreeze supplied from the auxiliary boiler 160 flows in the tube 1322 , and the heat of the second circulation tube 1322 is transferred to the first circulation tube 1321 through the conductive medium 1323 to the first circulation The low-temperature/low-pressure gas flowing through the tube 1321 is heated.

Through this, the low-temperature/low-pressure gas supplied from the four-way valve 121 via the radiator 140 is heated through the second heat exchanger 132 and then supplied to the compressor 110 to prevent a decrease in the efficiency of the compressor. will become

The heat pump unit 100 of the present invention includes a first oil separator 171 that removes oil components contained in the heated low-temperature/low-pressure gas supplied from the second heat exchanger 132 to the compressor 110 and the compressor. A second oil separator 172 that removes the oil component contained in the high-temperature/high-pressure gas supplied to the four-way valve 121 in 110 and supplies the oil component obtained through the removal process back to the compressor 110 . It may be configured to further include.

As shown in FIG. 1 , a first oil separator 171 is installed between the second heat exchanger 132 and the compressor 110 , and a second oil separator 171 is installed between the compressor 110 and the four-way valve 121 . 172) is installed.

In the process of heating the low-temperature/low-pressure gas to be supplied to the compressor 110 through the second heat exchanger 132, the oil component contained in the antifreeze flowing through the second heat exchanger 132 is introduced into the low-temperature/low-pressure gas. However, the oil component introduced into the low-temperature/low-pressure gas may act as a component that interferes with the compression in the compression process of the compressor 110 and must be removed.

Therefore, the first oil separator 171 functions to remove the oil component contained in the low-temperature/low-pressure gas before the low-temperature/low-pressure gas containing the oil component is supplied to the compressor 110 .

In addition, the oil component may be included in the generated high-temperature/high-pressure gas during the high-temperature/high-pressure gas generation process through the compressor 110 . The compressor 110 uses hydraulic pressure when generating high-temperature/high-pressure gas, and in this process, an oil component is introduced into the high-temperature/high-pressure gas.

The oil component contained in the high-temperature/high-pressure gas may cause a problem in the circulation system in the process of circulating the four-way valve 121, the first heat exchanger 131, the radiator 140, and the expansion valve 150. should be removed

Therefore, the second oil separator 172 functions to remove the oil component contained in the high temperature/high pressure gas before the high temperature/high pressure gas containing the oil component is supplied to the four-way valve 121 . In addition, the second oily liquid separator 172 supplies the oil component removed from the high-temperature/high-pressure gas back to the compressor 110 so that it can be reused.

The heat pump system 10 of the present invention operates in a cooling mode almost every day in summer to provide cooling water to an external use, and operates in a heating mode almost every day in winter to provide heating water to an external use.

Even in seasons that do not require cooling or heating, such as spring or autumn, there are occasions when domestic hot water is needed instead of heating water. In order to generate hot water that is occasionally needed in a season that does not require cooling or heating, such as spring or autumn, the compressor 110 , the first heat exchanger 131 , the radiator 140 , and the expansion valve 150 of the heat pump unit 100 . ) act as a factor of unnecessary power wastage.

Therefore, for the cooling mode or heating mode in summer or winter, the compressor 110, the first heat exchanger 131, the radiator 140, and the expansion valve 150 of the heat pump unit 100 are operated almost every day, The compressor 110, the first heat exchanger 131, the radiator 140, and the expansion valve 150 of the heat pump unit 100 do not operate, and the occasional hot water mode is turned on in spring or autumn when cooling or heating is not required. To this end, the heat pump unit 100 of the present invention may further include a first three-way valve 122 , a second three-way valve 123 , and a third heat exchanger 133 .

Specifically, as shown in Fig. 1, the heat pump unit 100

A first three-way valve 122 for supplying water supplied from the heating and cooling water treatment unit 200 to the first heat exchanger 131 or to the third heat exchanger 133 under the control of the controller 300;

According to the control of the controller 300, the water heated in the first heat exchanger 131 is supplied to the cooling/heating water treatment unit 200 or the water heated by the third heat exchanger 133 is supplied to the cooling/heating water treatment unit 200. The second three-way valve 123, and

A third heat exchanger 133 that heats the water supplied from the first three-way valve 122 using the heated antifreeze supplied from the inverter-type auxiliary boiler 160 and supplies it to the second three-way valve 123 is further added. characterized by including.

The first three-way valve 122 is a 3-way valve that controls the flow direction in three directions, and controls the water supplied from the heating and cooling water treatment unit 200 in the cooling mode or heating mode according to the control of the controller 300 . 1 The flow velocity direction is controlled so that it is supplied to the heat exchanger 200 , and in the hot water mode, the flow velocity direction is controlled so that the water supplied from the heating and cooling water treatment unit 200 is supplied to the third heat exchanger 133 .

The second three-way valve 123 is also a three-way valve that adjusts the flow direction in three directions like the first three-way valve 122, and in the cooling mode or heating mode according to the control of the controller 300, the first heat exchange The flow rate direction is controlled so that the heated water supplied from the unit 131 is supplied to the heating/cooling water treatment unit 200, and in the hot water mode, the heated water supplied from the third heat exchanger 133 is treated by the heating/cooling water treatment unit 200. The flow direction is controlled so that the

The third heat exchanger 133 uses the heated antifreeze supplied from the auxiliary boiler 160 to heat the water supplied through the first three-way valve 122 , and the heated water is heated to the second three-way valve 123 . to be supplied with

The third heat exchanger 133 has the same structure as the above-described second heat exchanger 132 , and a detailed description thereof will be omitted.

The heating and cooling water treatment unit 200 is configured to supply supplied water to the heat pump unit 100 , and to supply heating water or cooling water supplied by the heat pump unit 100 to an external user.

Specifically, as shown in FIG. 1 , the heating and cooling water treatment unit 200 is

A water supply tank 210 in which water supplied from the outside is stored, and

a first circulation pump 220 for supplying water stored in the water supply tank 210 to the heat pump unit 100;

a cold/hot water tank 230 in which heating water or cooling water supplied from the heat pump unit 100 is stored;

It is characterized in that it includes a second circulation pump 240 for supplying the heating or cooling water stored in the cold and hot water tank 230 to an external use.

The water supply tank 210 is configured to store water supplied from the outside, and the water stored in the water supply tank 210 is a first three-way valve 122 of the heat pump unit 100 through the first circulation pump 220 . After being transferred to, in the heating mode or cooling mode, the first three-way valve 122 is supplied to the first heat exchanger 131, and in the hot water mode, the third heat exchanger 133 from the first three-way valve 122 is supplied with

The cold and hot water tank 230 stores heating water or cooling water supplied from the first heat exchanger 131 (in heating mode or cooling mode) or storing hot water supplied from the third heat exchanger 133 (hot water mode) city) configuration, the heating water, cooling water, and hot water stored in the cold and hot water tank 230 are supplied to an external place of use through the second circulation pump 240 .

The controller 300 controls the heat pump unit 100 to operate in the heating mode when the user selects the heating mode, and controls the heat pump unit 100 to operate in the cooling mode when the user selects the cooling mode or controls the user to operate in the cooling mode. When the heated hot water mode is selected, the heat pump unit 100 is configured to control to operate in the hot water mode.

That is, when the user selects the heating mode, the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the first heat exchanger 131 , and the low-temperature/low-pressure gas supplied from the radiator 140 is converted into the compressor 110 . ) provides a first control signal to be supplied to the four-way valve 121 .

In addition, when the user selects the cooling mode, the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the radiator 140 , and the low-temperature/low-pressure gas supplied from the first heat exchanger 131 is converted into the compressor 110 . ) provides a second control signal to be supplied to the four-way valve 121 .

In addition, when the user selects a heating mode, when the external temperature is less than or equal to the set temperature in the cold season, the low-temperature/low-pressure gas supplied from the radiator 140 is supplied to the second heat exchanger 132 instead of the compressor 110 . A fourth control signal for providing a control signal to the four-way valve 121 and at the same time allowing the low-temperature/low-pressure gas to be supplied to the compressor 110 to reach a target temperature suitable for compression in the second heat exchanger 132 is transmitted to the auxiliary boiler 160 ) is provided.

In addition, when the user selects the hot water mode, the auxiliary boiler 160 provides a fifth control signal to the auxiliary boiler 160 to heat the antifreeze, and at the same time, the water supplied from the heating and cooling water treatment unit 200 is transferred to the third heat exchanger ( 133) provides a sixth control signal to the first three-way valve 122, and provides a seventh control signal for supplying water heated by the third heat exchanger 133 to the heating and cooling water treatment unit 200 It is characterized in that it is provided as a two-way valve (123).

In particular, when the temperature of the low-temperature/low-pressure gas supplied to the second heat exchanger 132 through the four-way valve 121 is below the target temperature suitable for compression, the controller 300 determines that the low-temperature/low-pressure gas temperature is the target temperature. It is characterized in that it determines a target temperature, which is a heating temperature of the antifreeze necessary to make it possible, and provides a fourth control signal to the auxiliary boiler 160 so that the antifreeze is heated to the determined target temperature.

Specifically, the controller 300 detects a low-temperature/low-pressure gas temperature supplied to the second heat exchanger 132 through the four-way valve 121 . The temperature can be grasped using the temperature of the connector connecting the radiator 140 and the four-way valve 121 . To this end, a temperature sensor may be installed in a connection pipe connecting the radiator 140 and the four-way valve 121 . That is, since low-temperature/low-pressure gas supplied to the second heat exchanger 132 through the four-way valve 121 flows through the connection pipe connecting the radiator 140 and the four-way valve 121, the radiator 140 and the four-way valve The temperature of the connecting pipe connecting the 121 corresponds to the low-temperature/low-pressure gas temperature supplied to the second heat exchanger 132 through the four-way valve 121 .

When the temperature of the low-temperature/low-pressure gas supplied to the second heat exchanger 132 is grasped, it is determined whether the detected temperature is equal to or less than the target temperature. As a result of the determination, if the target temperature is less than the target temperature, the target temperature, which is the heating temperature of the antifreeze required to make the low-temperature/low-pressure gas temperature become the target temperature, is determined.

That is, the low-temperature/low-pressure gas below the target temperature is heated in the second heat exchanger 132 through which the heated antifreeze flows, and the low-temperature/low-pressure gas below the target temperature becomes the target temperature in the second heat exchanger 132. It is to determine the target temperature, which is the temperature of the antifreeze to flow to the required second heat exchanger (132).

When the target temperature that is the determined heating temperature of the antifreeze is determined, a fourth control signal for heating the antifreeze to the determined target temperature is provided to the auxiliary boiler 160 so that the auxiliary boiler 160 heats the antifreeze to the determined target temperature .

Hereinafter, the control characteristics of the controller 300 according to the cooling mode, the heating mode (including the cold season mode), and the hot water mode, and the overall system operation characteristics will be described.

With reference to FIG. 5 , the operating characteristics of the cooling mode in summer will be described.

① The high-temperature/high-pressure gas generated in the compressor 110 is supplied to the radiator 140 through the four-way valve 121, and ② the high-temperature/high-pressure gas that has passed through the radiator 140 is supplied to the expansion valve 150 and , ③ The high-temperature/high-pressure gas supplied to the expansion valve 150 is converted into low-temperature/low-pressure gas and supplied to the first heat exchanger 131 , ④ as a refrigerant for cooling water generation in the first heat exchanger 131 . The used low-temperature/low-pressure gas is supplied back to the compressor 110 through the four-way valve 121 .

An operation characteristic of the winter heating mode will be described with reference to FIG. 6 .

① The high-temperature/high-pressure gas generated in the compressor 110 is supplied to the first heat exchanger 131 through the four-way valve 121, and ② the high-temperature/high-pressure gas used as a heat source for generating heating water in the first heat exchanger 131 The high-pressure gas is supplied to the expansion valve 150, ③ the high-temperature/high-pressure gas supplied to the expansion valve 150 is converted into low-temperature/low-pressure gas and supplied to the radiator 140, ④ the radiator 140 The low-temperature/low-pressure gas whose temperature rises while passing through is supplied back to the compressor 110 through the four-way valve 121 .

Referring to FIG. 7 , the operating characteristics of the winter cold season mode will be described.

① The high-temperature/high-pressure gas generated in the compressor 110 is supplied to the first heat exchanger 131 through the four-way valve 121, and ② the high-temperature/high-pressure gas used as a heat source for generating heating water in the first heat exchanger 131 The high-pressure gas is supplied to the expansion valve 150, ③ the high-temperature/high-pressure gas supplied to the expansion valve 150 is converted into low-temperature/low-pressure gas and supplied to the radiator 140, ④ the radiator 140 The low-temperature/low-pressure gas that has passed is supplied to the second heat exchanger 132 through the four-way valve 121, and ⑤ the low-temperature/low-pressure gas supplied to the second heat exchanger 132 is provided by the auxiliary boiler 160. After being heated by one heated antifreeze, it is supplied back to the compressor 110 .

The operation characteristics of the spring and autumn hot water mode will be described with reference to FIG. 8 .

① The water stored in the water supply tank 210 through the first three-way valve 122 is supplied to the third heat exchanger 133, ② the water supplied to the third heat exchanger 133 is provided by the auxiliary boiler 160 The water heated by the heated antifreeze and heated in the third heat exchanger 133 is supplied to the cold/hot water tank 230 through the second three-way valve 123 .

Although the technical idea of the present invention has been described together with the accompanying drawings in the above, the preferred embodiment of the present invention is exemplarily described and does not limit the present invention. In addition, it is a clear fact that various modifications and imitations are possible without departing from the scope of the technical spirit of the present invention by anyone having ordinary skill in the art.

100: heat pump unit
200: heating and cooling water treatment unit
300 : controller

Claims (8)

In the heat pump system to prevent a decrease in the efficiency of the heat pump in the cold season,
In the heating mode according to the control of the controller 300, the heating and cooling water processing unit 200 heats the supplied water to supply the heating water to the heating and cooling water processing unit 200, and in the cooling mode according to the control of the controller 300, a heat pump unit 100 for cooling the water supplied by the cooling/heating water treatment unit 200 and supplying cooling water to the cooling/heating water treatment unit 200;
a heating/cooling water treatment unit 200 that supplies the supplied water to the heat pump unit 100 and supplies heating water or cooling water supplied by the heat pump unit 100 to an external user;
When the user selects the heating mode, the heat pump unit 100 controls to operate in the heating mode, and when the user selects the cooling mode, includes a controller 300 for controlling the heat pump unit 100 to operate in the cooling mode, ,

The controller 300,
When the user selects the heating mode, the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the first heat exchanger 131 , and the low-temperature/low-pressure gas supplied from the radiator 140 is transferred to the compressor 110 . Provides a first control signal to be supplied to the four-way valve 121,
When the user selects the cooling mode, the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the radiator 140 , and the low-temperature/low-pressure gas supplied from the first heat exchanger 131 is transferred to the compressor 110 . Provides a second control signal to be supplied to the four-way valve 121,
When the user selects the heating mode, when the external temperature is below the set temperature in the cold season, the low-temperature/low-pressure gas supplied from the radiator 140 is supplied to the second heat exchanger 132 instead of the compressor 110. A third control signal is provided to the four-way valve 121 and at the same time, a fourth control signal for allowing the low-temperature/low-pressure gas to be supplied to the compressor 110 to reach a target temperature suitable for compression in the second heat exchanger 132 is sent to the auxiliary boiler 160 provide,
When the user selects the hot water mode, the auxiliary boiler 160 provides a fifth control signal to the auxiliary boiler 160 to heat the antifreeze, and at the same time, the water supplied from the heating and cooling water treatment unit 200 is transferred to the third heat exchanger 133 . provides a sixth control signal to be supplied to the first three-way valve 122, and a seventh control signal to supply water heated in the third heat exchanger 133 to the heating and cooling water treatment unit 200 is provided to the second three-way A heat pump system to prevent a decrease in the efficiency of the heat pump in the cold season, characterized in that provided by the valve (123).
The method according to claim 1,
The heat pump unit 100,
A compressor 110 that compresses low-temperature/low-pressure gas to generate high-temperature/high-pressure gas;
In the heating mode under the control of the controller 300 , the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the first heat exchanger 131 , and the low-temperature/low-pressure gas supplied from the radiator 140 is compressed In the cooling mode under the control of the controller 300, the high-temperature/high-pressure gas generated by the compressor 110 is supplied to the radiator 140 and supplied from the first heat exchanger 131. A four-way valve 121 for supplying low-temperature/low-pressure gas to the compressor 110, and
In the heating mode, the high-temperature/high-pressure gas supplied from the four-way valve 121 is used to heat the water supplied from the heating and cooling water treatment unit 200 to generate heating water, and the high-temperature/high-pressure The gas is supplied to the expansion valve 150, and in the cooling mode, the water supplied from the cooling/heating water treatment unit 200 is cooled using the low-temperature/low-pressure gas supplied from the expansion valve 150 so that cooling water is generated, and cooling water is generated. a first heat exchanger 131 for supplying a low-temperature/low-pressure gas used as a refrigerant for water generation to the four-way valve 121;
In the heating mode, the low-temperature/low-pressure gas supplied from the expansion valve 150 is supplied to the four-way valve 121 by increasing the temperature using the ambient temperature, and in the cooling mode, the high-temperature/high pressure gas supplied from the four-way valve 121 is supplied. A radiator 140 for supplying the gas to the expansion valve 150 by lowering the temperature using the ambient temperature;
In heating mode, high-temperature/high-pressure gas supplied from the first heat exchanger 131 is expanded to generate low-temperature/low-pressure gas, and the generated low-temperature/low-pressure gas is supplied to the radiator 140, and in cooling mode , by expanding the high-temperature/high-pressure gas supplied from the radiator 150 to generate low-temperature/low-pressure gas, and an expansion valve 150 for supplying the generated low-temperature/low-pressure gas to the first heat exchanger 131 . A heat pump system to prevent a decrease in the efficiency of the heat pump in the cold season, characterized in that
3. The method according to claim 2,
The heat pump unit 100,
An inverter-type auxiliary boiler 160 that heats the antifreeze to a target temperature under the control of the controller 300 and supplies it to the second heat exchanger 132;
A second heat exchanger 132 for allowing the low-temperature/low-pressure gas supplied from the four-way valve 121 to become a target temperature using antifreeze heated to a target temperature supplied from the auxiliary boiler 160,
The four-way valve 121 supplies the low-temperature/low-pressure gas supplied from the radiator 140 to the second heat exchanger 132 instead of the compressor 110 under the control of the controller 300,
The target temperature is the heating temperature of the antifreeze required to make the gas temperature of low temperature/low pressure in the second heat exchanger 132 become a target temperature suitable for compression,
The target temperature is a low-temperature/low-pressure gas temperature introduced into the compressor 110 so that high-temperature/high-pressure gas can be generated without reducing compression efficiency.
4. The method according to claim 3,
The heat pump unit 100,
a first oil separator 171 for removing oil components contained in the heated low-temperature/low-pressure gas supplied from the second heat exchanger 132 to the compressor 110;
The second oil separator 172 that removes the oil component contained in the high-temperature/high-pressure gas supplied from the compressor 110 to the four-way valve 121 and supplies the oil component obtained through the removal process back to the compressor 110 . ) Heat pump system to prevent a decrease in the efficiency of the heat pump in the cold season, characterized in that it further comprises.
4. The method according to claim 3,
The heat pump unit 100,
A first three-way valve 122 for supplying water supplied from the heating and cooling water treatment unit 200 to the first heat exchanger 131 or to the third heat exchanger 133 under the control of the controller 300;
According to the control of the controller 300, the water heated in the first heat exchanger 131 is supplied to the cooling/heating water treatment unit 200 or the water heated by the third heat exchanger 133 is supplied to the cooling/heating water treatment unit 200. The second three-way valve 123, and
A third heat exchanger 133 that heats the water supplied from the first three-way valve 122 using the heated antifreeze supplied from the inverter-type auxiliary boiler 160 and supplies it to the second three-way valve 123 is further added. including,

The auxiliary boiler 160 heats the antifreeze according to the control of the controller 400 and supplies it to the third heat exchanger 133.
The method according to claim 1,
The heating and cooling water treatment unit 200,
A water supply tank 210 in which water supplied from the outside is stored, and
a first circulation pump 220 for supplying water stored in the water supply tank 210 to the heat pump unit 100;
a cold/hot water tank 230 in which heating water or cooling water supplied from the heat pump unit 100 is stored;
A heat pump system for preventing a decrease in efficiency of a heat pump in the cold season, characterized in that it includes a second circulation pump 240 for supplying the heating or cooling water stored in the cold and hot water tank 230 to an external use place.
delete The method according to claim 1,
The controller 300,
If the temperature of the low-temperature/low-pressure gas supplied to the second heat exchanger 132 through the four-way valve 121 is below the target temperature suitable for compression, the heating temperature of the antifreeze required to make the low-temperature/low-pressure gas temperature become the target temperature A fourth control signal for determining the phosphorus target temperature and heating the antifreeze to the determined target temperature is provided to the auxiliary boiler 160,
The target temperature is the heating temperature of the antifreeze required to make the gas temperature of low temperature/low pressure in the second heat exchanger 132 become a target temperature suitable for compression,
The target temperature is a low-temperature/low-pressure gas temperature introduced into the compressor 110 so that high-temperature/high-pressure gas can be generated without reducing compression efficiency.

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