KR102036810B1 - Cold and hot water providing system - Google Patents

Abstract

Cold and hot water providing system according to an embodiment comprises a low-temperature heat exchanger having a low-temperature refrigerant and a tube through which water passes, and discharges cold water through heat exchange between the low-temperature refrigerant and the water; A high temperature heat exchanger having a high temperature refrigerant received from the outside and a tube through which water passes, and discharging hot water through heat exchange between the high temperature refrigerant and the water; A compressor for converting the refrigerant discharged from the low temperature heat exchanger into a high temperature gas state and transferring the refrigerant to the high temperature heat exchanger; An expansion valve configured to transfer the refrigerant discharged from the high temperature heat exchanger into a low temperature liquid state and transfer the refrigerant to the low temperature heat exchanger; A cold water tank for storing cold water discharged from the low temperature heat exchanger; And it may include a hot water tank for storing the hot water discharged from the high temperature heat exchanger.

Description

Cold and hot water supply system {COLD AND HOT WATER PROVIDING SYSTEM}

The description below relates to a cold and hot water providing system.

In general, in order to provide cold and hot water, separate chillers and boilers should be provided at the same time to cool or heat water.

In this case, since heat exchange between the refrigerant and the air is required in the process of cooling or heating the water, it is common to install an outdoor unit that is separately installed outdoors.

In addition, when equipped with a refrigerator and a boiler at the same time, it was cumbersome to configure and manage two devices with separate cycles, and when using a single air conditioner, time spent in switching from cooling to heating operation. And energy has been significant.

An object of one embodiment is to provide a cold and hot water providing system.

Cold and hot water providing system according to an embodiment comprises a low-temperature heat exchanger having a low-temperature refrigerant and a tube through which water passes, and discharges cold water through heat exchange between the low-temperature refrigerant and the water; A high temperature heat exchanger having a high temperature refrigerant received from the outside and a tube through which water passes, and discharging hot water through heat exchange between the high temperature refrigerant and the water; A compressor for converting the refrigerant discharged from the low temperature heat exchanger into a high temperature gas state and transferring the refrigerant to the high temperature heat exchanger; An expansion valve configured to transfer the refrigerant discharged from the high temperature heat exchanger into a low temperature liquid state and transfer the refrigerant to the low temperature heat exchanger; A cold water tank for storing cold water discharged from the low temperature heat exchanger; And it may include a hot water tank for storing the hot water discharged from the high temperature heat exchanger.

The cold / hot water providing system according to an embodiment may further include a case having a first internal space for accommodating the low temperature heat exchanger and a second internal space for accommodating the high temperature heat exchanger. It can be located indoors.

Cold and hot water providing system according to an embodiment, a fan coil unit having a blower and a coil; And a controller configured to control an operation of the cold / hot water providing system. When the fan coil unit performs cooling, the controller supplies the cold water of the cold water tank to the coil, and the fan coil unit. When performing one heating, the controller may supply the hot water of the hot water tank to the coil.

Cold and hot water providing system according to an embodiment, the coil inlet pipe connected to the inlet of the coil; A coil discharge pipe connected to the discharge end of the coil; A cold water inflow pipe and a hot water inflow pipe branched from the coil inflow pipe and connected to the cold water tank and the hot water tank, respectively; A cold water discharge pipe and a hot water discharge pipe branched from the coil discharge pipe and connected to the cold water tank and the hot water tank, respectively; A coil inlet valve installed at a point where the cold water inflow pipe and the hot water inflow pipe is branched to selectively supply the cold water or the hot water to the coil inflow pipe; And a coil discharge valve installed at a point at which the cold water discharge pipe and the hot water discharge pipe are branched to selectively discharge water discharged from the coil discharge pipe to the cold water tank or the hot water tank.

The low temperature heat exchanger may include: at least two evaporators through which the low temperature refrigerant passes sequentially and the water passes in reverse order of passage of the low temperature refrigerant; An evaporator water piping connected between said at least two evaporators; And at least one evaporator water valve respectively provided between the evaporator water pipes, and the controller controls the temperature of the water flowing inside the two or more evaporators in a direction opposite to the order in which the low temperature refrigerant flows. The opening and closing of the at least one evaporator water valve may be controlled to be lowered in stages, wherein the high temperature heat exchanger includes at least one in which the high temperature refrigerant passes sequentially and the water passes in reverse order of passage of the high temperature refrigerant. Two or more condensers; Condenser water piping connected between said at least two condenser; And at least one condenser water valve respectively provided between the condenser water pipes, wherein the control unit is configured to adjust the temperature of the water flowing therein according to a direction opposite to the order in which the hot refrigerant flows. The opening and closing of the at least one condenser water valve may be controlled to be stepped up.

The low temperature heat exchanger may include an evaporator temperature sensor provided in each of the at least two evaporators, and the control unit may be configured to set the temperature of the water flowing in the at least two evaporators for each of the evaporators. When the temperature is lower than or equal to, the water may move to the next located evaporator by opening the evaporator water valve installed in the evaporator water pipe through which water is discharged from the evaporator.

The high temperature heat exchanger may include a condenser temperature sensor provided at each of the at least two condensers, and the control unit may further include setting the temperature of the water flowing in the at least two condensers for each of the condensers. When the temperature is equal to or greater than the temperature, the condenser water valve installed in the condenser water pipe through which water is discharged from the condenser may be opened to move water to the next condenser. In the first internal space, the at least two or more evaporators are arranged in a first direction in a line in order of passage of the low temperature refrigerant, and in the second internal space, the at least two or more condensers May be arranged in a second direction forming a line in order of passage of the high temperature refrigerant.

The first direction and the second direction may be opposite to each other.

The cold water tank may be located below the cold heat exchanger, and the hot water tank may be located below the high temperature heat exchanger.

The hot water tank may include a hot water tank sensor for measuring a temperature of the hot water accommodated in the hot water tank, and when the temperature of the hot water exceeds a set hot water temperature based on the temperature of the hot water, The hot water may further include a controller for supplying heat to the heat source side heat exchanger by circulating the hot water to a heat source side heat exchanger located at an outside of the cold / hot water supply system.

Cold and hot water supply apparatus according to an embodiment may provide cold water and hot water at the same time.

Cold and hot water supply apparatus according to an embodiment does not include components installed outdoors, and can be compactly configured in one case, it is possible to reduce the heat island phenomenon or global warming problems in the city.

The cold / hot water supply apparatus according to an embodiment may provide cooling or hot water to the fan coil unit to perform cooling or heating of an indoor space using the fan coil unit.

According to the plurality of evaporators and condensers of one embodiment, it is possible to accurately and consistently adjust the temperature of the water discharged from the cold water tank or hot water tank.

According to the cold and hot water providing system of one embodiment, since the heat of the unused hot water in the hot water tank can be transferred to the heating facilities of other regions or households, waste heat can be used to save energy and increase thermal efficiency. .

1 is a front perspective view of a cold / hot water supply apparatus according to an embodiment.
2 is a rear perspective view of the cold / hot water supply apparatus according to an embodiment.
3 is a plan view of a cold / hot water supply apparatus according to an embodiment.
4 is a view illustrating a cycle circulation of the hot and cold water providing system according to an embodiment.
5 is a block diagram of a cold / hot water providing system according to an exemplary embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiment, when it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

Components included in any one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description in any one embodiment may be applied to other embodiments, and detailed descriptions thereof will be omitted in the overlapping range.

1 is a front perspective view of a cold / hot water supply apparatus according to an embodiment;

2 is a rear perspective view of the cold / hot water supply apparatus according to an embodiment, FIG. 3 is a plan view of the cold / hot water supply apparatus according to an embodiment, FIG. 4 is a view illustrating a cycle circulation of the cold / hot water supply system according to an embodiment; 5 is a block diagram of a cold / hot water providing system according to an exemplary embodiment.

1 to 5, the cold / hot water supply system 1 according to an embodiment may include a cold / hot water supply device 100 and a fan coil unit 200. The hot water tank 20 of the cold / hot water supply device 100 is connected to the heat source supply unit 300, and the water stored in the hot water tank 20 may be heat exchanged while circulating the heat source side heat exchanger 310 of the heat source supply unit 300. Can be.

Here, the heat source supply unit 300 may be understood as meaning a facility including a heat source side heat exchanger 310 for supplying heat to the heating facility connected to another area or household heating facility. For example, the heat source supply unit 300 may be an apartment machine room connected to the district heating power plant. In this case, the heat source supply unit 300 may supply heat received from the district heating power plant or heat of hot water stored in the hot water tank 20 of the cold / hot water supply device 100 to a heating facility of another region or household.

On the other hand, the heat source supply unit 300 is not necessarily connected to the district heating power plant. For example, the heat source supply unit 300 connects the heating facilities of different regions or households and the hot water tank of the cold / hot water supply apparatus 100 to transfer heat generated from the cold / hot water supply apparatus 100 to the heating facilities of other regions or households. It is enough to be able to supply. According to such a structure, since the hot and cold water supply device 100 can be supplied to other regions or households using heat generated more than necessary, energy can be saved by utilizing waste heat, and heat efficiency can be increased.

The cold / hot water supply device 100 may provide cold water and hot water by heating and cooling water through one cooling and heating cycle.

The fan coil unit 200 may receive hot water or cold water from the hot water tank 20 or the cold water tank 30 of the cold / hot water supply device 100, and cool or heat the indoor air through the received cold or hot water. Can be.

For example, the fan coil unit 200 may include a coil 210 formed to allow cold water or hot water to flow therein, and a blowing fan to blow air. The coil 210 may include an inflow end for introducing water from the cold / hot water supply device 100 and a discharge end for discharging water to the outside.

For example, the fan coil unit 200 may operate in a "cooling mode" for cooling the ambient air or a "heating mode" for heating the ambient air. For example, when the fan coil unit 200 operates in the cooling mode, the coil 210 may receive low temperature water (hereinafter, “cold water”) from the cold / hot water supply device 100, and operate in the heating mode. In this case, the coil 210 may receive hot water (hereinafter, “hot water”) from the cold / hot water supply device 100.

For example, the cold / hot water supply device 100 includes a case 18, a controller 70, a low temperature heat exchanger 11, a high temperature heat exchanger 12, a compressor 14, an expansion valve 15, and a cold water tank ( 30, hot water tank 20, a plurality of pipes, coil inlet valve 53, coil discharge valve 54, the first circulation pump 551, the second circulation pump 571 and the third circulation pump 611 It may include.

The case 18 may be formed in a box shape having an inner space, and accommodate the remaining portion of the cold / hot water supply device 100 as the inner space. The case 18 may be located indoors. In other words, the cold / hot water supply device 100 may not include an outdoor heat exchanger installed outdoors. According to such a structure, by not providing an outdoor heat exchanger, it is possible to reduce urban heat island phenomenon and global warming problem.

The controller 70 may control a thermal cycle circulating process of the cold / hot water supply device 100, that is, the flow of refrigerant and water flowing inside the cold / hot water supply device 100, and the cold water generated by the cold / hot water supply device 100. The fan coil unit 200 may be operated through hot water.

The low temperature heat exchanger 11 may receive water and a low temperature refrigerant from the outside, and cool the water through heat exchange between the water and the low temperature refrigerant. For example, the low temperature heat exchanger 11 may include an evaporator 111, an evaporator refrigerant pipe 112, an evaporator water pipe 113, an evaporator water valve 114, and an evaporator temperature sensor 115.

The evaporator 111 may be provided with a tube through which the refrigerant and water pass, respectively, and may cool the water through heat exchange between the refrigerant in the low temperature liquid state and the water. For example, the evaporator 111 may be configured as one, but may be configured as at least two or more. For example, the evaporator 111 may be configured as five as shown in Figs. 1 to 4, and will be described assuming that the evaporator 111 is configured as five in this specification, but the number of the evaporator 111 May be configured in any number.

When the evaporator 111 is comprised of five, the evaporator 111 is the 1st evaporator 111a, the 2nd evaporator 111b, the 3rd evaporator 111c, and the 4th evaporator 111d according to the order which a refrigerant | coolant passes. And a fifth evaporator 111e.

For example, the plurality of evaporators 111 may be disposed above the cold water tank 30 and the hot water tank 20 which will be described later in the case 18. For example, the space in which the plurality of evaporators 111 are installed in the case 18 may be referred to as a "first interior space."

For example, the plurality of evaporators 111 may be arranged side by side in the first internal space, and in this case, a direction in which the first to fifth evaporators 111 are sequentially arranged may be referred to as a “first direction”. Can be.

For example, the refrigerant flows sequentially from the first evaporator 111a to the fifth evaporator 111e along the first direction, and the water flows from the fifth evaporator 111e to the first evaporator 111a in the first direction. Can flow in the reverse direction.

The controller 70 controls the evaporator water valve 114 to control the evaporator water valve 114 so that the water flowing in the reverse direction of the first direction passes through the plurality of evaporators 111 in a stepwise manner. The temperature of the water can be maintained at a constant temperature.

Since the refrigerant is sequentially moved from the first evaporator 111a to the subsequent evaporators 111b, 111c, 111d, and 111e, the temperature of the refrigerant is sequentially increased in the process of cooling the water flowing through each evaporator 111. In other words, according to the flow of the refrigerant, the temperature of the refrigerant is formed at the lowest in the first evaporator 111a, and the temperature is increased toward the subsequent evaporators 111b, 111c, 111d, and 111e so that the temperature of the refrigerant is increased by the fifth evaporator ( The highest in 111e).

Since water flows in the reverse direction of the flow of the refrigerant, the temperature of the water in the fourth evaporator 111d may be lower than the temperature of the water in the fifth evaporator 111e, and the temperature of the water in the third evaporator 111c may be the fourth evaporator ( 111d) may be lower than the temperature of the water. According to this sequential process, the temperature of the water in the first evaporator 111a may be lower than the temperature of the water in the other remaining evaporators 111b, 111c, 111d, and 111e.

The water cooled through the first evaporator 111a to the fifth evaporator 111e, that is, all the evaporators 111 may be discharged from the last evaporator 111a and then moved to the cold water tank 30.

The evaporator refrigerant pipe 112 may be connected between the plurality of evaporators 111 as a pipe through which the refrigerant flows, and the refrigerant may flow between the plurality of evaporators 111 through the plurality of evaporator refrigerant pipes 112. .

The evaporator water pipe 113 may be connected between the plurality of evaporators 111 as a pipe through which water flows, and water may flow between the plurality of evaporators 111 through the plurality of evaporator water pipes 113. .

The evaporator water valve 114 may be installed between the plurality of evaporator water pipes 113. For example, the evaporator water valve 114 may control the flow of water flowing along the evaporator water piping 113 between the two evaporators 111.

For example, the evaporator water valve 114 may be a check valve to prevent backflow in the flow of water, and may be a gate valve capable of controlling the flow of water through the evaporator water pipe 113. The evaporator water valve 114 may be controlled by the control unit 70.

The evaporator temperature sensor 115 may be installed in the plurality of evaporators 111 to measure the temperature of water in the evaporator 111. For example, the evaporator temperature sensor 115 may be respectively installed inside each evaporator 111 or may be respectively installed at portions where water is discharged from each evaporator 111 in the evaporator water pipe 113.

According to the evaporator water valve 114 and the evaporator temperature sensor 115, the control unit 70 may measure the temperature of each evaporator 111 through the evaporator temperature sensor 115 installed in the plurality of evaporators 111, A set temperature value may be set for each evaporator 111. For example, the set temperatures of the first evaporator 111a to the fifth evaporator 111e may be 1 degree Celsius, 2 degrees, 3 degrees, 4 degrees, and 5 degrees, respectively.

For example, if the temperature of the water in each evaporator 111 is greater than the set temperature of the evaporator 111, the control unit 70 is located next to the evaporator 111 and the flow of water, the evaporator 111 located next. The flow of water can be stopped by closing the evaporator water valve 114 installed in the evaporator water pipe 113 connected therebetween.

On the contrary, when the temperature of water in each evaporator 111 is less than or equal to the set temperature of the corresponding evaporator 111, the control unit 70 is cooled in the corresponding evaporator 111 by opening the evaporator water valve 114. Water may be moved to the evaporator 111 located in the next path.

For example, the set temperatures of the plurality of evaporators 111 may be set to be smaller according to the path through which water flows, that is, each of the evaporators 111 from the fifth evaporator 111e to the first evaporator 111a. The set temperature value may decrease sequentially.

According to the above structure, as it is possible to cool the temperature of the water in steps by the number of evaporators 111, it is possible to precisely control the cooling of the water, and in particular, it is possible to accurately achieve the cooling temperature of the target water in the end. have.

The high temperature heat exchanger 12 may receive water and a high temperature refrigerant from the outside and heat the water through heat exchange between the water and the high temperature refrigerant. For example, the high temperature heat exchanger 12 may include a condenser 121, a condenser refrigerant pipe 122, a condenser water pipe 123, a condenser water valve 124, and a condenser temperature sensor 125.

The condenser 121 may include a tube through which the refrigerant and water pass, respectively, and heat the water through heat exchange between the refrigerant and water in a high temperature gas state. For example, the condenser 121 may be composed of one, but may be composed of any number of at least two or more. For example, the condenser 121 may be composed of five as shown in Figures 1 to 4, and will be described assuming that the condenser 121 is composed of five as described herein, the number of the condenser 121 May be configured in any number.

When the condenser 121 is composed of five, the condenser 121, the first condenser 121a, the second condenser 121b, the third condenser 121c, the fourth condenser 121d in the order of passing the refrigerant. And a fifth condenser 121e.

For example, the high temperature heat exchanger 12 may be disposed above the cold water tank 30 and the hot water tank 20 which will be described later in the case 18. For example, a space in which the plurality of condensers 121 is installed inside the case 18 may be referred to as a “second space”.

For example, the plurality of condensers 121 may be arranged side by side in a second space, and in this case, a direction in which the first to fifth condensers 121 are sequentially arranged may be referred to as a “second direction”. have.

For example, the refrigerant flows sequentially from the first condenser 121a to the fifth condenser 121e along the second direction, and the water flows in the second direction from the fifth condenser 121e to the first condenser 121a. Can flow in a direction.

For example, the control unit 70 controls each condenser by controlling the condenser water valve 124 so that the water flowing along the reverse direction in the second direction is gradually increased in temperature while passing through the plurality of condensers 121. At 121, the water temperature may be maintained at a constant temperature.

Since the refrigerant is sequentially moved from the first condenser 121a to the subsequent condensers 121b, 121c, 121d, and 121e, the temperature of the refrigerant is sequentially lowered in the process of heating the water flowing through each condenser 121. In other words, according to the flow of the coolant, the temperature of the coolant is formed highest in the first condenser 121a, and the temperature of the coolant is lowered toward the subsequent condensers 121b, 121c, 121d, and 121e so that the temperature of the coolant becomes the fifth condenser ( The lowest in 121e).

Since water flows in the reverse direction of the flow of the refrigerant, the temperature of the water in the fourth condenser 121d may be higher than the temperature of the water in the fifth condenser 121e, and the temperature of the water in the third condenser 121c may be higher than that of the fourth condenser 121c. 121d) may be higher than the temperature of the water. According to this sequential process, the temperature of the water in the first condenser 121a may be higher than the temperature of the water in the other remaining condensers 121b, 121c, 121d, and 121e.

The internal space of the case 18 includes a first internal space in which the low temperature heat exchanger 11 is accommodated, and a second internal space in which the high temperature heat exchanger 12 is accommodated, and the second internal space is a first internal space. It may be disposed adjacent to the space. For example, each of the first internal space and the second internal space may have a rectangular parallelepiped shape extending in the horizontal direction, and the long extended surface may be in contact with each other. The plurality of evaporators 111 and the plurality of condensers 121 may be accommodated in the first inner space and the second inner space, respectively, and arranged in the elongated direction on the respective inner spaces.

In this case, the second direction may be opposite to the first direction in which the plurality of evaporators 111 are installed along the flow path of the refrigerant. In other words, the first condenser 121a may face each other with the fifth evaporator 111e, and the fifth condenser 121e may be disposed to face each other with the first evaporator. In other words, the direction in which the first to fifth condensers 121 are sequentially arranged may be the reverse direction of the direction in which the first to fifth evaporators 111 are sequentially arranged.

According to the above structure, the direction of increasing the temperature of the water and the refrigerant in the plurality of condenser 121 may be the same as the direction of the order of increasing the temperature of the water and the refrigerant in the plurality of evaporator 111. For example, the first condenser 121a having the highest temperature of the water and the refrigerant among the plurality of condensers 121 is the fifth evaporator 111e having the highest temperature of the water and the refrigerant among the plurality of evaporators 111. ), And the fifth condenser 121e having the lowest temperature may likewise be disposed adjacent to the first evaporator 111a having the lowest temperature.

Accordingly, since the temperature difference between the refrigerant and the water between the adjacent evaporator 111 and the condenser 121 can be reduced, interference of the temperature generated between the evaporator 111 and the condenser 121 can be alleviated.

The water heated through the first condenser 121a to the fifth condenser 121e, that is, all the condensers 121 may be discharged from the last condenser 121e and then moved to the hot water tank 20.

The condenser refrigerant pipe 122 may be connected between the plurality of condensers 121 as a pipe through which the refrigerant flows, and the refrigerant may flow between the plurality of condensers 121 through the plurality of condenser refrigerant pipes 122. .

The condenser water pipe 123 may be connected between the plurality of condensers 121 as pipes through which water flows, and water may flow between the plurality of condensers 121 through the plurality of condenser water pipes 123. .

The condenser water valve 124 may be installed between the plurality of condenser water pipes 123. For example, the condenser water valve 124 may control the flow of water flowing along the condenser water pipe 123 between two condensers 121.

For example, the condenser water valve 124 may be a check valve for preventing backflow in the flow of water, and may be a gate valve capable of controlling the flow of water through the condenser water pipe 123. The condenser water valve 124 may be controlled by the controller 70.

The condenser temperature sensor 125 may be installed in the plurality of condensers 121 to measure the temperature of water in the condenser 121. For example, the condenser temperature sensor 125 may be respectively installed inside each condenser 121 or may be respectively installed in a portion where water is discharged from each condenser 121 in the condenser water pipe 123.

According to the condenser water valve 124 and the condenser temperature sensor 125, the control unit 70 may measure the temperature of each condenser 121 through the condenser temperature sensor 125 installed in the plurality of condenser 121, The set temperature value may be set for each condenser 121. For example, the set temperatures of the first condenser 121a to the fifth condenser 121e may be 83 degrees Celsius, 70 degrees, 60 degrees, 50 degrees, and 40 degrees, respectively.

For example, when the temperature of the water in each condenser 121 is less than the set temperature of the condenser 121, the control unit 70 is located next to the condenser 121 and the flow of the water condenser 121 The flow of water may be stopped by closing the condenser water valve 124 installed in the condenser water pipe 123 connected therebetween.

Conversely, if the temperature of the water in each condenser 121 is equal to or greater than the set temperature of the condenser 121, the control unit 70 is heated in the condenser 121 by opening the condenser water valve 124 Water may be moved to the condenser 121 located in the next path.

For example, the set temperatures of the plurality of condensers 121 may be set to be high along the path through which water flows, that is, the condenser 121 of each of the condensers 121 from the fifth condenser 121e to the first condenser 121a. The set temperature value may increase sequentially.

According to the above structure, as it is possible to increase the temperature of the water in steps by the number of condensers 121, it is possible to precisely control the heating of the water, and in particular, it is possible to accurately achieve the heating temperature of the final target water have.

The compressor 14 may make the refrigerant discharged from the low temperature heat exchanger 11 into a high temperature gas state, and deliver the high temperature refrigerant to the high temperature heat exchanger 12.

The expansion valve 15 may make the refrigerant discharged from the high temperature heat exchanger 12 into a low temperature liquid state, and transfer the low temperature refrigerant to the low temperature heat exchanger 11.

The cold water tank 30 can accommodate the water cooled by the low temperature heat exchanger 11 inside. For example, the cold water tank 30 may be disposed below the low temperature heat exchanger 11. Accordingly, the cold water discharged from the low temperature heat exchanger 11 may flow into the cold water tank 30 according to gravity.

For example, the cold water tank 30 may include a cold water tank sensor unit 31. The cold water tank sensor unit 31 may include a sensor capable of measuring the temperature and the surface of the cold water accommodated in the cold water tank 30.

For example, the controller 70 measures the water surface and the temperature of the cold water tank 30 and determines that the cold water tank 30 needs more cold water, and then controls the low temperature heat exchanger 11 and the high temperature heat exchanger 12. It may be commanded to perform a further thermal cycle operation, or cold water may be introduced through an externally connected cold water supply pipe.

The hot water tank 20 may accommodate the water heated by the high temperature heat exchanger 12 therein. For example, the hot water tank 20 may be disposed below the high temperature heat exchanger 12. Accordingly, hot water discharged from the high temperature heat exchanger 12 may flow into the hot water tank 20 according to gravity.

For example, the hot water tank 20 may include a hot water tank sensor 21. The hot water tank sensor unit 21 may include a sensor capable of measuring the temperature and the water surface of the hot water accommodated in the hot water tank 20.

For example, the controller 70 measures the water surface and the temperature of the hot water tank 20, and determines that the hot water tank 20 needs more hot water, thereby controlling the low temperature heat exchanger 11 and the high temperature heat exchanger 12. It may be further commanded to perform a thermal cycle operation, or hot water heated by the heat source supply unit 300 may be introduced.

The plurality of pipes include the first refrigerant pipe 41, the second refrigerant pipe 42, the third refrigerant pipe 43, the first water supply pipe 44, the second water supply pipe 45, and the third water. Supply piping 46, 1st water discharge piping 47, 2nd water discharge piping 48, 1st heat source side piping 61, 2nd heat source side piping 62, coil inflow piping 51, coil The discharge pipe 52, the cold water inlet pipe 57, the cold water discharge pipe 58, the hot water inlet pipe 55, and the hot water discharge pipe 56 may be included.

The first refrigerant pipe 41 is a pipe connected between the low temperature heat exchanger 11 and the compressor 14, and the refrigerant discharged from the low temperature heat exchanger 11 through the first refrigerant pipe 41 is transferred to the compressor 14. I can move it.

The second refrigerant pipe 42 is a pipe connected between the compressor 14 and the high temperature heat exchanger 12, and the refrigerant discharged from the compressor 14 through the second refrigerant pipe 42 is transferred to the high temperature heat exchanger 12. I can move it.

The third refrigerant pipe 43 is a pipe connected between the high temperature heat exchanger 12 and the low temperature heat exchanger 11, and the refrigerant discharged from the high temperature heat exchanger 12 through the third refrigerant pipe 43 is a low temperature heat exchanger. You can move on to (11).

For example, an expansion valve 15 may be installed between the third refrigerant pipes 43. For example, the third refrigerant pipe 43 may include a dry filter 16 installed between the high temperature heat exchanger 12 and the expansion valve 15. The dry filter can remove moisture or foreign matter in the refrigerant.

The first water supply pipe 44 may receive water from the outside of the cold / hot water supply device 100 and transmit the water to the case 18.

The second water supply pipe 45 may be a pipe connected to the first water supply pipe 44 to supply water to the low temperature heat exchanger 11. For example, the second water supply pipe 45 may be connected to the fifth evaporator 111e as shown in FIG. 2. For example, the second water supply pipe 45 may be provided with a gate valve that can adjust the supply amount of water.

The third water supply pipe 46 may be a pipe connected to the first water supply pipe 44 to supply water to the high temperature heat exchanger 12. For example, the third water supply pipe 46 may be connected to the fifth condenser 121e. For example, the third water supply pipe 46 may be provided with a gate valve that can adjust the supply amount of water.

For example, the second and third water supply pipes 45 and 46 may not be connected to the first water supply pipe 44, but may be pipes separately supplied with water.

The first water discharge pipe 47 is a pipe connected between the low temperature heat exchanger 11 and the cold water tank 30, and the cold water discharged from the low temperature heat exchanger 11 through the first water discharge pipe 47 is a cold water tank. Can be delivered. For example, the first water discharge pipe 47 may be connected from the first evaporator 111a. For example, a check valve 471 may be installed in the first water discharge pipe 47 to prevent backflow of water.

The second water discharge pipe 48 is a pipe connected between the high temperature heat exchanger 12 and the hot water tank 20, and the hot water discharged from the high temperature heat exchanger 12 through the second water discharge pipe 48 is a cold water tank. Can be delivered. For example, the second water discharge pipe 48 may be connected from the first condenser 121a. For example, the second water discharge pipe 48 may be provided with a check valve 481 for preventing backflow of water.

The first heat source side pipe 61 may connect between the hot water tank 20 and the heat source side heat exchanger 310 connected to the heat source supply unit 300. The hot water received in the hot water tank 20 through the first heat source side pipe 61 may be transferred to the heat source side heat exchanger 310 of the heat source supply unit 300. For example, a third circulation pump 611 may be installed between the first heat source side pipes 61.

The second heat source side pipe 62 may connect between the heat source side heat exchanger 310 and the hot water tank 20. The hot water introduced into the heat source side heat exchanger 310 through the first heat source side pipe 61 transfers heat to the heat source supply unit 300, and then to the hot water tank 20 through the second heat source side pipe 62. Can be introduced again.

The coil inlet pipe 51 may be a pipe connected to an inlet end for receiving water into the coil 210 of the fan coil unit 200.

The coil discharge pipe 52 may be a pipe connected to a discharge end through which water that has undergone heat exchange in the coil 210 is discharged to the outside of the coil 210.

The cold water inlet pipe 57 may be connected between the cold water tank 30 and the coil inlet pipe 51, and may transmit cold water contained in the cold water tank 30 to the coil 210 through the cold water inlet pipe 57. . For example, the coil inlet valve 53 may be connected between the cold water inlet pipe 57 and the coil inlet pipe 51. For example, a first circulation pump 551 to be described later may be installed between the cold water inflow pipes 57.

The cold water discharge pipe 58 is a pipe connecting the coil discharge pipe 52 and the cold water tank 30, and the water discharged from the coil discharge pipe 52 is transferred to the cold water tank 30 through the cold water discharge pipe 58. Can be delivered.

The hot water inflow pipe 55 may connect between the hot water tank 20 and the coil inflow pipe 51, and may transmit hot water received in the hot water tank 20 to the coil 210 through the hot water inflow pipe 55. . For example, the coil inlet valve 53 may be connected between the hot water inlet pipe 55 and the coil inlet pipe 51. For example, a second circulation pump 571 may be installed between the hot water inflow pipes 55.

The hot water discharge pipe 56 is a pipe connecting the coil discharge pipe 52 and the hot water tank 20, and the water discharged from the coil discharge pipe 52 is connected to the hot water tank 20 through the hot water discharge pipe 56. Can be delivered.

The first circulation pump 551 may be installed between the hot water inflow pipes 55, and may transmit hot water contained in the cold water tank 30 to the coil 210, and thus the cold water tank 30 and the coil ( Water may circulate between 210.

The second circulation pump 571 may be installed between the cold water inflow pipes 57, and may transmit hot water contained in the hot water tank 20 to the coil 210, and thus, the hot water tank 20 and the coil ( Water may circulate between 210.

On the other hand, unlike the illustrated, the cold and hot water supply device 100 may include a fan coil unit circulation pump installed in any one of the coil inlet pipe 51 and the coil discharge pipe 52. In this case, the fan coil unit circulation pump may send the hot or cold water received from the hot water inlet pipe 55 or the cold water inlet pipe 57 to the coil 210, in which case the first circulation pump 551 and the second circulation The pump 571 may be omitted.

The third circulation pump 611 may be installed between the first heat source side pipes 61, and may transmit hot water contained in the hot water tank 20 to the heat source side heat exchanger 310, whereby the hot water tank ( Water may circulate between 20) and the heat source side heat exchanger 310. The third circulation pump 611 may be referred to as a "heat source side heat exchanger circulation pump."

According to the third circulation pump 611, the first heat source side pipe 61, and the second heat source side pipe 62, the hot water stored in the hot water tank 20 is transferred to the heat source side heat exchanger 310 of the heat source supply unit 300. In order to transfer the heat of the hot water to the heat source supply unit 300, that is, the control unit 70 operates the third circulation pump 611 between the hot water tank 20 and the heat source side heat exchanger 310. Hot water can be circulated.

According to the above structure, since the unused waste heat of the hot water stored in the hot water tank 20 can be transferred to a nearby heat source supply unit 300, the energy efficiency of the cold / hot water providing system 1 can be improved.

The coil inflow valve 53 may be a three-way valve provided between the coil inflow pipe 51, the cold water inflow pipe 57, and the hot water inflow pipe 55. For example, the coil inlet valve 53 is installed at a point where the hot water inlet pipe 55 and the cold water inlet pipe 57 are branched, so that the coil inlet pipe 51 is the hot water inlet pipe 55 and the cold water inlet pipe ( 57 may be selectively communicated with any one of the pipes. For example, the coil inlet valve 53 may be controlled by the controller 70.

The coil discharge valve 54 may be a three-way valve provided between the coil discharge pipe 52, the cold water discharge pipe 58, and the hot water discharge pipe 56. For example, the coil discharge valve 54 is installed at a point where the hot water discharge pipe 56 and the cold water discharge pipe 58 are branched, and the coil discharge pipe 52 is connected to the hot water discharge pipe 56 and the cold water discharge pipe ( 58) can be selectively communicated with any one of the pipes. For example, the coil discharge valve 54 may be controlled by the controller 70.

According to the coil inlet valve 53 and the coil discharge valve 54, when the fan coil unit 200 operates in the cooling mode or the heating mode, the cold water or hot water is transferred from the cold water tank 30 or the hot water tank 20. I can receive it.

For example, when the fan coil unit 200 operates in the cooling mode, the control unit 70 controls the coil inlet valve 53 to direct the flow path between the cold water inlet pipe 57 and the coil inlet pipe 51. And the flow path of the coil discharge valve 54 can be formed between the cold water discharge pipe 58 and the coil discharge pipe 52.

Subsequently, the controller 70 may operate the first circulation pump 551 to circulate the cold water between the cold water tank 30 and the coil 210. In other words, the fan coil unit 200 may be operated in a cooling mode while producing cold water and hot water together.

For example, when the fan coil unit 200 operates in the heating mode, the control unit 70 controls the coil inlet valve 53 to direct the flow path between the hot water inlet pipe 55 and the coil inlet pipe 51. It can be formed, and the flow path of the coil discharge valve 54 can be formed between the hot water discharge pipe 56 and the coil discharge pipe 52.

Subsequently, the controller 70 may operate the second circulation pump 571 to circulate cold water between the hot water tank 20 and the coil 210. In other words, the fan coil unit 200 may be operated in a heating mode while producing cold water and hot water together.

According to the above structure, the fan coil unit 200 is heated in the heating mode by switching between the coil inlet valve 53 and the coil discharge valve 54 and controlling the first circulation pump 551 and the second circulation pump 571. And the cooling mode, and the switching between the heating mode and the cooling mode can be made with a quick and simple operation.

Although embodiments have been described with reference to the accompanying drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described structure, apparatus, etc. may be combined or combined in a different form than the described method, or may be combined with other components or equivalents. Appropriate results can be achieved even if they are replaced or substituted.

Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims that follow.

Claims (10)

A low temperature heat exchanger having a low temperature refrigerant received from the outside and a tube through which water passes, and discharging cold water through heat exchange between the low temperature refrigerant and the water;
A high temperature heat exchanger having a high temperature refrigerant received from the outside and a tube through which water passes, and discharging hot water through heat exchange between the high temperature refrigerant and the water;
A compressor for converting the refrigerant discharged from the low temperature heat exchanger into a high temperature gas state and transferring the refrigerant to the high temperature heat exchanger;
An expansion valve configured to transfer the refrigerant discharged from the high temperature heat exchanger into a low temperature liquid state and transfer the refrigerant to the low temperature heat exchanger;
A cold water tank for storing cold water discharged from the low temperature heat exchanger; And
A hot water tank storing hot water discharged from the high temperature heat exchanger and having a hot water tank sensor measuring a temperature of the hot water;
A case having a first inner space for accommodating the low temperature heat exchanger and a second inner space disposed adjacent to the first inner space for accommodating the high temperature heat exchanger;
A fan coil unit having a blower and a coil; And
A control unit for controlling heat exchange through the low temperature heat exchanger and the high temperature heat exchanger,
The low temperature heat exchanger,
Arranged in a line along a first direction within the first internal space so that the low temperature refrigerant passes sequentially along the first direction, and water is in a second direction opposite to the order in which the low temperature refrigerant passes. At least two or more evaporators passing through;
An evaporator water piping connected between said at least two evaporators;
An evaporator temperature sensor provided at each of the at least two evaporators; And
At least one evaporator water valve is provided between each of the evaporator water pipe,
The high temperature heat exchanger,
Disposed in a line along the second direction within the second internal space and facing each of the at least two or more evaporators so that the high temperature refrigerant passes sequentially along the second direction, and water is At least two condensers passing in said first direction opposite to the order in which refrigerant passes;
Condenser water piping connected between said at least two condenser;
A condenser temperature sensor provided at each of the at least two condensers; And
At least one condenser water valve each provided between the condenser water pipes;
The control unit (a-1) when the temperature of the water flowing in the two or more evaporator is lower than the set temperature which is set to be lowered step by step for each of the at least two evaporators step by opening the evaporator water valve step by step When water flows along the second direction and (a-2) the temperature of the water flowing inside the two or more condensers becomes equal to or greater than a set temperature set to be gradually increased for each of the at least two condensers, step by step Open the condenser water valve to flow water along the first direction, (b-1) when the fan coil unit performs cooling, supply the cold water of the cold water tank to the coil, and (b- 2) When the fan coil unit performs heating, the hot water of the hot water tank is supplied to the coil, and (c) the temperature of the hot water exceeds the set hot water temperature. , Hot water system of the water contained in the hot water tank, characterized in that circulating in the external heat source supplying heat supply.
delete delete The method of claim 1,
A coil inlet pipe connected to the inlet of the coil;
A coil discharge pipe connected to the discharge end of the coil;
A cold water inflow pipe and a hot water inflow pipe branched from the coil inflow pipe and connected to the cold water tank and the hot water tank, respectively;
A cold water discharge pipe and a hot water discharge pipe branched from the coil discharge pipe and connected to the cold water tank and the hot water tank, respectively;
A coil inlet valve installed at a point where the cold water inflow pipe and the hot water inflow pipe is branched to selectively supply the cold water or the hot water to the coil inflow pipe; And
And a coil discharge valve installed at a point at which the cold water discharge pipe and the hot water discharge pipe are branched to selectively discharge water discharged from the coil discharge pipe to the cold water tank or the hot water tank.
delete delete delete delete The method of claim 1,
The cold water tank is located below the low temperature heat exchanger,
The hot water tank is cold and hot water providing system is located below the high temperature heat exchanger. delete

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