KR20190017559A - Cold and hot water providing system - Google Patents

Abstract

According to an embodiment, a system for providing cold water and hot water may include: a low temperature heat exchanger which is provided with pipes, through which a refrigerant of a low temperature and water received from the outside passes, respectively, and discharges cold water through heat exchange of the low temperature refrigerant and water; a high temperature heat exchanger which is provided with pipes, through which a refrigerant of a high temperature and water received from the outside passes, respectively, and discharges hot water through heat exchange of the high temperature refrigerant and the water; a compressor which converts the refrigerant discharged from the low temperature heat exchanger into a high temperature gaseous state and delivers the refrigerant to the high temperature heat exchanger; an expansion valve which converts the refrigerant discharged from the high temperature heat exchanger into a low temperature liquid state and delivers the refrigerant to the low temperature heat exchanger; a cold water tank which stores the cold water discharged from the low temperature heat exchanger; and a hot water tank which stores the hot water discharged from the high temperature heat exchanger. Accordingly, hot water and cold water can be supplied at the same time.

Description

[0001] COLD AND HOT WATER PROVIDING SYSTEM [0002]

The following description relates to a cold / hot water supply system.

Generally, in order to provide cold and hot water, a separate refrigerator and a boiler must be provided at the same time to cool or heat the water.

In this case, since heat exchange between the refrigerant and the atmosphere is required in the process of cooling or heating the water, an outdoor unit installed outside the room is generally installed.

In addition, when the refrigerator and the boiler are provided at the same time, it is troublesome to construct and manage two devices having separate cycles. In the case of using one cooling and heating device, the time consumed in switching from the cooling operation to the heating operation And there is a problem that energy is considerable.

An object of one embodiment is to provide a cold / hot water supply system.

The cold / hot water supply system according to an embodiment includes a low-temperature heat exchanger having a low-temperature refrigerant delivered 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 delivered 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 gaseous state and transferring the refrigerant to the high-temperature heat exchanger; An expansion valve for converting the refrigerant discharged from the high-temperature heat exchanger into a low-temperature liquid state and transferring 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 for storing hot water discharged from the high temperature heat exchanger.

The cold / hot water supply 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, Can be located indoors.

According to an embodiment, there is provided a cold / hot water supply system including: a fan coil unit including a blower and a coil; And a control unit for controlling the operation of the cold / hot water supply system. When the fan coil unit performs cooling, the control unit supplies the cold water of the cold water tank to the coil, When performing the one-time heating, the control unit can supply the hot water of the hot water tank to the coil.

The cold / hot water supply system according to an embodiment of the present invention includes: a coil inflow pipe connected to an inlet end of the coil; A coil discharge pipe connected to a 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 inflow valve installed at a branch point of the cold water inflow pipe and the hot water inflow pipe to selectively supply the cold water or the hot water to the coil inflow pipe; And a coil discharge valve installed at a branch point of the cold water discharge pipe and the hot water discharge pipe for selectively discharging water discharged from the coil discharge pipe to the cold water tank or the hot water tank.

Wherein the low-temperature heat exchanger comprises at least two evaporators through which the low-temperature refrigerant sequentially passes, and water flows in the reverse order of passage of the low-temperature refrigerant; An evaporator water pipe connected between the at least two evaporators; And at least one evaporator water valve provided between the evaporator water pipe and the evaporator water pipe, respectively, wherein the controller controls the temperature of the water flowing in the two or more evaporators in accordance with a direction opposite to the order in which the low- Wherein the high temperature heat exchanger is capable of controlling the opening and closing of the at least one evaporator water valve such that the high temperature refrigerant sequentially passes through the high temperature heat exchanger, Two or more condensers; A condenser water line connected between the at least two condensers; And at least one condenser water valve provided between the condenser water pipes, wherein the control unit controls the temperature of the water flowing in the two or more condensers according to a direction opposite to the order in which the high-temperature refrigerant flows And control the opening and closing of the at least one condenser water valve so as to increase stepwise.

The low-temperature heat exchanger may include an evaporator temperature sensor provided in each of the at least two evaporators, and the control unit controls the temperature of the at least two evaporators such that the temperature of the water flowing in the evaporator When the temperature is equal to or smaller than the temperature, the evaporator water valve installed in the evaporator water pipe through which the water is discharged from the evaporator is opened to allow the water to move to the next evaporator.

The high-temperature heat exchanger may include a condenser temperature sensor provided in each of the at least two condensers, and the control unit may be configured such that the temperature of water flowing in the at least two or more condensers is set to each of the condensers If 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 can be opened to move the condenser to the next condenser. In the first internal space, the at least two evaporators are arranged in a first direction in a line in the 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 that is aligned in the order of the 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 low temperature 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 the temperature of the hot water stored in the hot water tank. When the temperature of the hot water exceeds the set hot water temperature based on the temperature of the hot water, And a control unit for circulating the hot water to a heat source side heat exchanger of a heat source supply unit located outside the hot / cold water supply system to supply heat to the heat source side heat exchanger.

The cold / hot water supply device according to an embodiment can simultaneously provide cold water and hot water.

The cold / hot water supply device according to the embodiment does not include the components installed outdoors, and can be configured compactly in one case, thereby reducing the heat island phenomenon and the global warming problem.

The cold / hot water supply device according to one embodiment can provide cooling water or hot water to the fan coil unit, so that cooling or heating of the indoor space can be performed using the fan coil unit.

According to the plurality of evaporators and the condenser of one embodiment, the temperature of the water discharged from the cold water tank or the hot water tank can be adjusted accurately and constantly.

According to the cold / hot water supply system of the embodiment, since the heat of the hot water not used in the hot water tank can be transferred to the heating facilities of other regions or households, energy can be saved by using the waste heat, .

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

Hereinafter, embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments, detailed description of known functions and configurations incorporated herein will be omitted when it may make the best of an understanding clear.

In describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

The components included in any one embodiment and the components including common functions will be described using the same names in other embodiments. Unless otherwise stated, the description of any one embodiment may be applied to other embodiments, and a detailed description thereof will be omitted in the overlapping scope.

1 is a front perspective view of a 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, FIG. 4 is a view showing a cycle circulation of the cold / hot water supply system according to an embodiment, and FIG. 5 is a block diagram of a cold / hot water supply system according to an 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 circulates through the heat source side heat exchanger 310 of the heat source supply unit 300, .

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

On the other hand, the heat source supply unit 300 is not necessarily connected to a district heating power plant. For example, the heat source supply unit 300 may connect the heating unit of another area or household and the hot water tank of the hot / hot water supply unit 100 to heat the heat generated by the hot / Anything that can supply is enough. According to this structure, it is possible to supply the heat to the other region or household by using the amount of heat generated by the cold / hot water supply device 100 unnecessarily, so that the energy can be saved by using the waste heat, and the heat efficiency can be increased.

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

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

For example, the fan coil unit 200 may include a coil 210 configured to allow cold water or hot water to flow therein, and a blowing fan for blowing air. The coil 210 may have 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 can 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 can receive cold water (hereinafter referred to as "cold water") from the cold / hot water supply device 100, The coil 210 can 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 control unit 70, a low temperature heat exchanger 11, a high temperature heat exchanger 12, a compressor 14, an expansion valve 15, A hot water tank 20, a plurality of pipes, a coil inlet valve 53, a coil discharge valve 54, a first circulation pump 551, a second circulation pump 571 and a third circulation pump 611, . ≪ / RTI >

The case 18 may be formed in a box shape having an inner space and may receive the remaining portion of the hot / hot water supply apparatus 100 as an 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, since the outdoor heat exchanger is not provided, the heat island phenomenon and the global warming problem can be reduced.

The control unit 70 can control the heat cycle circulation process of the cold / hot water supplying apparatus 100, that is, the flow of the refrigerant and water flowing in the cold / hot water supplying apparatus 100, The fan coil unit 200 can be operated through hot water.

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

The evaporator 111 may include a pipe 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 composed of one, but may be composed of at least two or more. For example, the evaporator 111 may include five evaporators 111 as shown in FIGS. 1 to 4. In this specification, it is assumed that the number of the evaporators 111 is five, but the number of the evaporators 111 May be arbitrary number.

The evaporator 111 is divided into a first evaporator 111a, a second evaporator 111b, a third evaporator 111c and a fourth evaporator 111d according to the order of passage of the refrigerant, And a fifth evaporator 111e.

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

For example, the plurality of evaporators 111 may be arranged in a line in the first inner space. In this case, the direction in which the first to fifth evaporators 111 are sequentially arranged is referred to as "first direction" .

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

The controller 70 controls the evaporator water valve 114 so that the temperature of the water flowing in the direction opposite to the first direction decreases step by step as the evaporator 111 passes through the plurality of evaporators 111, The water temperature can be maintained at a constant temperature.

The refrigerant is sequentially moved from the first evaporator 111a to the subsequent evaporators 111b, 111c, 111d, and 111e, so that the temperature of the refrigerant sequentially increases 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 lowest in the first evaporator 111a, and the temperature of the refrigerant becomes higher as it goes to the subsequent evaporators 111b, 111c, 111d and 111e, 111e.

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

The water cooled through the first evaporator 111a through the fifth evaporator 111e or all the evaporators 111 can be discharged to the cold water tank 30 after being discharged from the last evaporator 111a.

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

The evaporator water pipe 113 can be connected between the plurality of evaporators 111 as a pipe through which the water flows and water can 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 can control the flow of water flowing along the evaporator water line 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 that can control 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 a plurality of evaporators 111 to measure the temperature of water in the evaporator 111. For example, the evaporator temperature sensor 115 may be installed in each of the evaporators 111, or may be installed in a portion of the evaporator water pipe 113 where water is discharged from each of the evaporators 111.

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

For example, when the temperature of water in each evaporator 111 is greater than the set temperature of the evaporator 111, the controller 70 controls the evaporator 111 and the next evaporator 111 according to the flow of water, The flow of water can be stopped by closing the evaporator water valve 114 provided in the evaporator water pipe 113 connected between the evaporator water pipe 113 and the evaporator water pipe 113. [

On the contrary, when the temperature of water in each evaporator 111 is equal to or less than the set temperature of the evaporator 111, the controller 70 opens the evaporator water valve 114 to cool the evaporator 111 The water can be moved to the evaporator 111 located at the following path.

For example, the set temperatures of the plurality of evaporators 111 may be set to be smaller along the path of water flow. In other words, the set temperatures of the evaporators 111 from the fifth evaporator 111e to the first evaporator 111a The set temperature value can be sequentially decreased.

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

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

The condenser 121 may have a tube through which the refrigerant and water pass, respectively, and can heat the water through heat exchange between the refrigerant in the gaseous state at a high temperature and the water. For example, the condenser 121 may be composed of one, but it may be composed of at least two or more arbitrary numbers. For example, the condenser 121 may be composed of five as shown in FIGS. 1 to 4. In this specification, it is assumed that the number of the condensers 121 is five, but the number of the condensers 121 May be arbitrary number.

The condenser 121 is provided with a first condenser 121a, a second condenser 121b, a third condenser 121c and a fourth condenser 121d according to the order of passage of the refrigerant, And a fifth condenser 121e.

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

For example, the plurality of condensers 121 may be arranged in a line in the second space, and in this case, the 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 sequentially flows in the second direction from the first condenser 121a to the fifth condenser 121e, and the water flows from the fifth condenser 121e to the first condenser 121a in the second direction Direction.

For example, the controller 70 controls the condenser water valve 124 so that the water flowing in the reverse direction in the second direction is gradually increased in temperature as it passes through the plurality of condensers 121, It is possible to maintain the temperature of the water at a constant temperature in the water tank 121.

Since the refrigerant is sequentially transferred 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 the respective condensers 121. [ In other words, depending on the flow of the refrigerant, the temperature of the refrigerant is made highest in the first condenser 121a, the temperature becomes lower toward the subsequent condensers 121b, 121c, 121d and 121e, 121e.

The temperature of the water in the fourth condenser 121d may be higher than the temperature of water in the fifth condenser 121e and the temperature of the water in the third condenser 121c is lower than the temperature of the water in the fourth condenser 121c 121d). ≪ / RTI > According to this sequential process, the temperature of water in the first condenser 121a may be higher than the temperature of water in the 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 can be disposed adjacent to the space. For example, the first inner space and the second inner space may each have a rectangular parallelepiped shape elongated in the transverse direction and have a shape in which the elongated surfaces abut each other. The plurality of evaporators 111 and the plurality of condensers 121 may be respectively accommodated in the first inner space and the second inner space, and may be arranged in a long extension 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 faces the fifth evaporator 111e, and the fifth condenser 121e may be disposed to face the first evaporator 121a. In other words, the direction in which the first to fifth condensers 121 are sequentially disposed may be the reverse direction to the direction in which the first to fifth evaporators 111 are sequentially arranged.

According to the above structure, the direction in which the temperatures of the water and the refrigerant are increased in the plurality of condensers 121 may coincide with the order of increasing the temperature of the water and the refrigerant in the plurality of evaporators 111. For example, the first condenser 121a, in which the temperature of water and the refrigerant is maintained at the highest level among the plurality of condensers 121, is connected to the fifth evaporator 111e And the fifth condenser 121e having the lowest temperature can be disposed adjacent to the first evaporator 111a where the temperature is kept lowest.

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

The water heated through the first to fifth condensers 121a to 121e and all the condensers 121 can be discharged from the last condenser 121e and then transferred to the hot water tank 20. [

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

The condenser water pipe 123 can be connected between the plurality of condensers 121 as a pipe through which the water flows and water can 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 can control the flow of water flowing along the condenser water line 123 between the two condensers 121.

For example, the condenser water valve 124 may be a check valve for preventing reverse flow 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 control unit 70.

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

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

For example, when the temperature of water in each of the condensers 121 is lower than the set temperature of the condenser 121, the controller 70 controls the condenser 121 and the condenser 121, The flow of water can be stopped by closing the condenser water valve 124 provided in the condenser water pipe 123 connected between the condenser water pipe 123 and the condenser water pipe 123. [

Conversely, when the temperature of water in each of the condensers 121 is equal to or larger than the set temperature of the corresponding condenser 121, the controller 70 opens the condenser water valve 124, The water can be moved to the condenser 121 located at the following path.

For example, the set temperatures of the plurality of condensers 121 can be set to be higher according to the flow path of water. In other words, the set temperatures of the condensers 121 from the fifth condenser 121e to the first condenser 121a The set temperature value can be sequentially increased.

According to the above structure, it is possible to increase the water temperature stepwise by the number of the condensers 121, so that it is possible to accurately control the heating of water, and in particular, to achieve the heating temperature of the target water accurately have.

The compressor (14) can convert the refrigerant discharged from the low temperature heat exchanger (11) into a high temperature gaseous state, and can transfer the high temperature refrigerant to the high temperature heat exchanger (12).

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

The cold water tank (30) can receive water cooled therein by the low temperature heat exchanger (11). 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) can be introduced into the cold water tank (30) according to the 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 water level of the cold water contained in the cold water tank 30.

For example, the controller 70 measures the water surface and temperature of the cold water tank 30, and when the cold water tank 30 is judged to require more cold water, the low temperature heat exchanger 11 and the high temperature heat exchanger 12 To perform a thermal cycle operation including the cold water supply, or to allow the cold water to flow through the cold water supply pipe connected from the outside.

The hot water tank 20 can receive 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 can flow into the hot water tank 20 according to gravity.

For example, the hot water tank 20 may include a hot water tank sensor unit 21. [ The hot water tank sensor unit 21 may include a sensor capable of measuring the temperature and the water level of hot water stored 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 controls the low temperature heat exchanger 11 and the high temperature heat exchanger 12 when it is determined that hot water is required in the hot water tank 20 Or to cause hot water heated by the heat source supply unit 300 to flow.

The plurality of pipelines are connected to 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, The first water supply pipe 46, the first water discharge pipe 47, the second water discharge pipe 48, the first heat source side pipe 61, the second heat source side pipe 62, the coil inflow pipe 51, A cold water inflow pipe 57, a cold water inflow pipe 58, a hot water inflow pipe 55 and a hot water discharge pipe 56. The hot water inflow pipe 57,

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 supplied to the compressor 14 Can be moved.

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 passed through the high temperature heat exchanger 12 Can be moved.

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 passes through the low- (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 can receive water from the outside of the cold / hot water supplying device 100 and can transfer the water to the inside of the case 18.

The second water supply pipe 45 may be a pipe connected from the first water supply pipe 44 and supplying 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. For example, the second water supply pipe 45 may be provided with a gate valve capable of regulating the supply amount of water.

The third water supply pipe 46 may be a pipe connected from the first water supply pipe 44 and supplying 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 capable of regulating 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 individually supplied with water from the outside.

The first water discharge pipe 47 is a pipe connected between the low temperature heat exchanger 11 and the cold water tank 30 so that the cold water discharged from the low temperature heat exchanger 11 through the first water discharge pipe 47 flows into the cold water tank Lt; / RTI > For example, the first water discharge pipe 47 may be connected to the first evaporator 111a. For example, the first water discharge pipe 47 may be provided with a check valve 471 for preventing reverse flow 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 flows into the cold water tank Lt; / RTI > 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 can 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 stored in the hot water tank 20 through the first heat source side pipe 61 can 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 can 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 flows to the hot water tank 20 through the second heat source side pipe 62 Can be reintroduced.

The coil inflow 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 an outlet end of the coil 210 in which water having undergone heat exchange is discharged to the outside of the coil 210.

The cold water inflow pipe 57 can connect between the cold water tank 30 and the coil inflow pipe 51 and can transfer the cold water stored in the cold water tank 30 to the coil 210 through the cold water inflow pipe 57 . For example, a coil inflow valve 53 may be connected between the cold water inflow pipe 57 and the coil inflow pipe 51. For example, a first circulation pump 551, which will be described later, may be installed between the cold water inflow pipes 57.

The cold water discharge pipe 58 connects between the coil discharge pipe 52 and the cold water tank 30. The water discharged from the coil discharge pipe 52 flows into the cold water tank 30 through the cold water discharge pipe 58, Lt; / RTI >

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

The hot water discharge pipe 56 connects between the coil discharge pipe 52 and the hot water tank 20. The water discharged from the coil discharge pipe 52 flows into the hot water tank 20 through the hot water discharge pipe 56, Lt; / RTI >

The first circulation pump 551 can be installed between the hot water inflow pipe 55 and can send the hot water stored in the cold water tank 30 to the coil 210. As a result, the cold water tank 30 and the coil 210 can circulate water.

The second circulation pump 571 can be installed between the cold water inflow pipe 57 and can send the hot water stored in the hot water tank 20 to the coil 210. As a result, the hot water tank 20 and the coil 210 can circulate water.

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

The third circulation pump 611 can be installed between the first heat source side piping 61 and can send the hot water stored in the hot water tank 20 to the heat source side heat exchanger 310, 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 piping 61 and the second heat source side piping 62, hot water stored in the hot water tank 20 is supplied to the heat source side heat exchanger 310 of the heat source supply unit 300, The control unit 70 operates the third circulation pump 611 to supply heat from the hot water tank 20 and the heat source side heat exchanger 310 to the heat source supply unit 300. In other words, 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 the nearby heat source supply unit 300, the energy efficiency of the hot / hot water supply 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 inflow valve 53 is installed at the point where the hot water inflow pipe 55 and the cold water inflow pipe 57 are branched so that the coil inflow pipe 51 is connected to the hot water inflow pipe 55 and the cold water inflow pipe 57, respectively. For example, the coil inflow valve 53 may be controlled by the control unit 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 provided at a position 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). [0051] As shown in Fig. For example, the coil discharge valve 54 may be controlled by the control unit 70. [

According to the coil inflow valve 53 and the coil discharge valve 54, when the fan coil unit 200 operates in the cooling mode or the heating mode, cold water or hot water is delivered from the cold water tank 30 or the hot water tank 20 Can receive.

For example, when the fan coil unit 200 operates in the cooling mode, the control unit 70 controls the coil inflow valve 53 so as to move the flow path between the cold water inflow pipe 57 and the coil inflow 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.

Then, the control unit 70 can circulate the cold water between the cold water tank 30 and the coil 210 by operating the first circulation pump 551. In other words, the fan coil unit 200 can be operated in the cooling mode while producing cold water and hot water together.

For example, when the fan coil unit 200 operates in the heating mode, the controller 70 controls the coil inflow valve 53 to switch the flow path between the hot water inflow pipe 55 and the coil inflow pipe 51 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.

The control unit 70 can then circulate the cold water between the hot water tank 20 and the coil 210 by operating the second circulation pump 571. [ In other words, the fan coil unit 200 can be operated in the heating mode while producing cold water and hot water together.

According to the above structure, the fan coil unit 200 is switched to the heating mode through the switching of the coil inflow valve 53 and the coil discharge valve 54 and the control of the first circulation pump 551 and the second circulation pump 571 And the cooling mode, and switching between the heating mode and the cooling mode can be performed by a quick and simple operation.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. For example, it is contemplated that the techniques described may be performed in a different order than the described methods, and / or that components of the described structures, devices, and the like may be combined or combined in other ways than the described methods, Appropriate results can be achieved even if they are replaced or replaced.

Therefore, other implementations, other embodiments and equivalents to the claims are within the scope of the following claims.

Claims (10)

A low temperature heat exchanger having a low temperature refrigerant delivered 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 delivered 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 gaseous state and transferring the refrigerant to the high-temperature heat exchanger;
An expansion valve for converting the refrigerant discharged from the high-temperature heat exchanger into a low-temperature liquid state and transferring the refrigerant to the low-temperature heat exchanger;
A cold water tank for storing cold water discharged from the low temperature heat exchanger; And
And a hot water tank for storing hot water discharged from the high temperature heat exchanger.
The method according to claim 1,
Further comprising a case having a first internal space for receiving the low temperature heat exchanger and a second internal space for receiving the high temperature heat exchanger,
Wherein the case is located indoors.
3. The method of claim 2,
A fan coil unit having an air blower and a coil; And
Further comprising a control unit for controlling an operation of the cold / hot water supply system,
When the fan coil unit performs cooling,
Wherein the controller supplies the cold water of the cold water tank to the coil,
When performing the heating of the fan coil unit,
Wherein the control unit supplies the hot water of the hot water tank to the coil.
The method of claim 3,
A coil inflow pipe connected to the inflow end of the coil;
A coil discharge pipe connected to a 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 inflow valve installed at a branch point of the cold water inflow pipe and the hot water inflow pipe to selectively supply the cold water or the hot water to the coil inflow pipe; And
And a coil discharge valve installed at a branch point of the cold water discharge pipe and the hot water discharge pipe for selectively discharging water discharged from the coil discharge pipe to the cold water tank or the hot water tank.
The method of claim 3,
The low-temperature heat exchanger
At least two evaporators through which the low-temperature refrigerant sequentially passes, and water through which the low-temperature refrigerant passes in the reverse order;
An evaporator water pipe connected between the at least two evaporators; And
And at least one evaporator water valve provided between the evaporator water pipes, respectively,
Wherein the control unit controls the opening and closing of the at least one evaporator water valve so that the temperature of the water flowing inside the two or more evaporators is gradually lowered in the opposite direction to the order in which the low temperature refrigerant flows,
The high temperature heat exchanger
At least two condensers through which the high-temperature refrigerant sequentially passes, and water through which the high-temperature refrigerant passes inversely;
A condenser water line connected between the at least two condensers; And
And at least one condenser water valve each provided between the condenser water pipes,
Wherein the control unit controls the opening and closing of the at least one condenser water valve so that the temperature of the water flowing in the two or more condensers gradually increases in a direction opposite to the order in which the high temperature refrigerant flows. system.
6. The method of claim 5,
The low-temperature heat exchanger
And an evaporator temperature sensor provided in each of the at least two evaporators,
Wherein the controller controls the evaporator water valve installed in the evaporator water pipe from which water is discharged from the evaporator, when the temperature of the water flowing in the at least two evaporators becomes equal to or smaller than a set temperature set for each of the evaporators, The water is moved to the evaporator located next,
The high temperature heat exchanger
And a condenser temperature sensor provided in each of the at least two condensers,
Wherein the control unit controls the condenser water valve installed in the condenser water pipe to discharge water from the condenser when the temperature of the water flowing inside the condenser is equal to or greater than a set temperature set for each of the condensers, And the water is moved to the condenser located next.
6. The method of claim 5,
In the first internal space, the at least two evaporators are arranged in a first direction in a line according to the order of passage of the low-temperature refrigerant,
Wherein the at least two condensers are arranged in a second direction in a line in the order in which the high-temperature refrigerant passes, in the second internal space.
8. The method of claim 7,
Wherein the first direction and the second direction are opposite to each other.
9. The method of claim 8,
The cold water tank is located below the low-temperature heat exchanger,
Wherein the hot water tank is located below the high-temperature heat exchanger.
The method according to claim 1,
In the hot water tank,
And a hot water tank sensor for measuring a temperature of the hot water accommodated in the hot water tank,
When the temperature of the hot water exceeds the set hot water temperature based on the temperature of the hot water, the hot water stored in the hot water tank is circulated to the heat source side heat exchanger of the heat source supply unit located outside the hot / And a controller for supplying heat to the heat exchanger.

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