Heat pump

Abstract

A heat pump according to one aspect of the present invention comprises: a hot water supply unit including a water tank containing water and a hot water supply heat exchanger that heat-exchanges the water with a refrigerant; the at least one indoor unit is arranged indoors, and the indoor unit comprises an indoor heat exchanger; and an outdoor unit connected to the indoor unit and the hot water supply unit by means of refrigerant piping, the outdoor unit including an outdoor heat exchanger connected to the indoor unit and the hot water supply unit by means of a plurality of independent loops, an outdoor compressor, and an outdoor expansion valve, the outdoor compressor being connected to the outdoor heat exchanger by means of a plurality of independent loops, and the outdoor expansion valve being connected to the outdoor heat exchanger by means of a plurality of independent loops. The plurality of circuits (Loop) includes an air conditioning circuit (Loop) in which refrigerant circulates between the outdoor heat exchanger and the indoor unit, and a hot water supply circuit (Loop) in which refrigerant circulates between the outdoor heat exchanger and the hot water supply unit.

Description

Technical Field

[0001] This invention relates to a heat pump. In particular, this invention relates to a heat pump capable of simultaneously supplying hot water to an indoor space while cooling or heating it. Background Technology

[0002] A heat pump is generally a device that uses the compression, condensation, expansion, and evaporation of a refrigerant to cool or heat an indoor space. When the outdoor heat exchanger of a heat pump acts as a condenser and the indoor heat exchanger acts as an evaporator, it can cool the room. Conversely, when the outdoor heat exchanger acts as an evaporator and the indoor heat exchanger acts as a condenser, it can heat the room.

[0003] For example, a heat pump can be an air-to-water heat pump (AWHP) that uses water as the medium for heat exchange with the refrigerant. In this case, the high-temperature refrigerant discharged from the compressor heats the water stored in the tank, thereby enabling hot water supply operation to supply hot water to the room.

[0004] Prior art document 1 (Korean Patent Publication No. 10-2261862) and prior art document 2 (Korean Patent Publication No. 10-2019-0081837) relate to a multi-functional air conditioning system capable of simultaneously performing air conditioning and hot water supply. The prior art documents disclose a structure in which refrigerant discharged from the outdoor unit compressor flows to another hot water supply unit for heat exchange.

[0005] In such a multifunctional system, when using an external wall coil, the refrigerant charge increases due to the increased refrigerant charge. Therefore, when using a substitute refrigerant, the increased refrigerant charge presents limitations, necessitating additional ventilation or safety devices. Furthermore, when hot water supply and heating operate simultaneously, it is difficult to establish distinct condensing temperatures for each. Summary of the Invention

[0006] The problem the invention aims to solve

[0007] The purpose of this invention is to solve the aforementioned problems and other issues.

[0008] The purpose of this invention is to provide a heat pump that can simultaneously perform air conditioning and hot water supply at low cost.

[0009] The purpose of this invention is to provide a heat pump that minimizes refrigerant leakage and is safer.

[0010] The purpose of this invention is to provide a heat pump that can generate different condensing temperatures when operating simultaneously.

[0011] means for solving problems

[0012] According to one aspect of the invention for achieving the above or other objectives, the refrigerant circulation structures on the air conditioning side and the hot water supply side are separated into a dual loop, enabling independent operation of hot water supply and air conditioning, and enhancing safety.

[0013] According to one aspect of the invention for achieving the above or other objectives, the heat exchanger of the outdoor unit is composed of a dual loop consisting of a hot water supply loop and an air conditioning loop, which can independently perform hot water supply operation and air conditioning operation, and enhances safety.

[0014] According to one aspect of the invention for achieving the above or other objectives, a compressor independent of the air conditioning loop is used to allow refrigerant to flow in the hot water supply loop. Furthermore, a water tank consisting of a separate expansion device and an outer wall coil is used in the hot water supply loop.

[0015] A heat pump according to one aspect of the invention for achieving the above or other objectives includes: a hot water supply unit comprising a water tank containing water and a hot water supply heat exchanger, the hot water supply heat exchanger exchanging heat between the water and a refrigerant; at least one indoor unit disposed indoors, the indoor unit including an indoor heat exchanger; and an outdoor unit connected to the indoor unit and the hot water supply unit via refrigerant piping, the outdoor unit including an outdoor heat exchanger, an outdoor compressor, and an outdoor expansion valve; the outdoor heat exchanger being connected to the indoor unit and the hot water supply unit via a plurality of independent loops; the plurality of loops including an air conditioning loop and a hot water supply loop, in which refrigerant circulates between the outdoor heat exchanger and the indoor unit, and in which refrigerant circulates between the outdoor heat exchanger and the hot water supply unit.

[0016] The hot water supply unit may further include: a hot water supply compressor for compressing and discharging refrigerant; and a hot water supply expansion valve for expanding the refrigerant passing through the hot water supply heat exchanger.

[0017] The hot water supply compressor and the hot water supply expansion valve can be configured in the mechanical compartment on the upper side of the water tank.

[0018] The hot water supply heat exchanger is wound around the outer wall of the water tank. One end of the hot water supply heat exchanger can be connected to the hot water supply compressor, and the other end of the hot water supply heat exchanger can be connected to the hot water supply expansion valve.

[0019] The outdoor compressor may be a variable frequency compressor that allows the refrigerant compression capacity to be variable, and the hot water supply compressor may be a constant speed compressor that allows the refrigerant compression capacity to be constant.

[0020] The capacity of the hot water supply compressor can be smaller than that of the outdoor compressor.

[0021] The outdoor heat exchanger may include a first outdoor heat exchanger connected to the indoor unit and a second outdoor heat exchanger connected to the hot water supply unit.

[0022] The outdoor unit may also include an outdoor fan, which is disposed on one side of the first outdoor heat exchanger and the second outdoor heat exchanger.

[0023] The first outdoor heat exchanger and the second outdoor heat exchanger can be configured one above the other.

[0024] The first outdoor heat exchanger and the second outdoor heat exchanger can be configured separately.

[0025] The plurality of loops can be used to divide and connect the plurality of internal flow paths of the outdoor heat exchanger to the indoor unit or the hot water supply unit.

[0026] The air conditioning circuit may include: a manifold connected to the outdoor compressor; a distributor connected to the outdoor expansion valve side; and a plurality of branch pipes connected to the distributor.

[0027] The outdoor unit may also include a switching valve that selectively directs the refrigerant discharged from the outdoor compressor to the indoor heat exchanger or the outdoor heat exchanger.

[0028] During cooling operation, the switching valve can direct the refrigerant discharged from the outdoor compressor to the outdoor heat exchanger; during heating operation, the switching valve can direct the refrigerant discharged from the outdoor compressor to the indoor heat exchanger.

[0029] The indoor unit may also include an expansion valve disposed between the outdoor expansion valve and the indoor heat exchanger.

[0030] The outdoor unit may also include an expansion valve, which is disposed between the outdoor expansion valve and the indoor heat exchanger.

[0031] According to one aspect of the present invention, a heat pump includes: a hot water supply unit comprising a water tank for containing water and a hot water supply heat exchanger, the hot water supply heat exchanger exchanging heat between the water and a refrigerant; at least one indoor unit disposed indoors, the indoor unit including an indoor heat exchanger and an indoor expansion valve; and an outdoor unit comprising a first outdoor heat exchanger connected to the indoor unit, a second outdoor heat exchanger connected to the hot water supply unit, an outdoor compressor, and an outdoor expansion valve; the outdoor unit and the indoor unit are connected via an air conditioning loop; in the air conditioning loop, a refrigerant circulates between the first outdoor heat exchanger and the indoor unit; the outdoor unit and the hot water supply unit are connected via a hot water supply loop; in the hot water supply loop, a refrigerant circulates between the second outdoor heat exchanger and the hot water supply unit.

[0032] According to one aspect of the present invention, a heat pump includes: a hot water supply unit comprising a water tank for containing water and a hot water supply heat exchanger, the hot water supply heat exchanger exchanging heat between the water and a refrigerant; at least one indoor unit disposed indoors, the indoor unit including an indoor heat exchanger and an indoor expansion valve; and an outdoor unit comprising an outdoor heat exchanger, an outdoor compressor, and an outdoor expansion valve connected to the indoor unit and the hot water supply unit; the outdoor heat exchanger dividing a plurality of internal flow paths differently and connecting to the indoor unit or the hot water supply unit via a plurality of independent loops, the plurality of loops including an air conditioning loop and a hot water supply loop; in the air conditioning loop, the refrigerant circulates between the outdoor heat exchanger and the indoor unit; in the hot water supply loop, the refrigerant circulates between the outdoor heat exchanger and the hot water supply unit.

[0033] According to one aspect of the invention, a heat pump includes: a hot water supply unit comprising a water tank for containing water and a hot water supply heat exchanger, the hot water supply heat exchanger exchanging heat between the water and a refrigerant; at least one indoor unit disposed indoors, the indoor unit including an indoor heat exchanger; and an outdoor unit comprising a first outdoor heat exchanger connected to the indoor unit, a second outdoor heat exchanger connected to the hot water supply unit, an outdoor compressor, an outdoor expansion valve, and an expansion valve disposed between the outdoor expansion valve and the indoor heat exchanger; the outdoor unit and the indoor unit are connected via an air conditioning loop in which a refrigerant circulates between the first outdoor heat exchanger and the indoor unit; the outdoor unit and the hot water supply unit are connected via a hot water supply loop in which a refrigerant circulates between the second outdoor heat exchanger and the hot water supply unit.

[0034] According to one aspect of the present invention, a heat pump includes: a hot water supply unit comprising a water tank for containing water and a hot water supply heat exchanger, the hot water supply heat exchanger exchanging heat between the water and a refrigerant; at least one indoor unit disposed indoors, the indoor unit including an indoor heat exchanger; and an outdoor unit comprising an outdoor heat exchanger connected to the indoor unit and the hot water supply unit, an outdoor compressor, an outdoor expansion valve, and an expansion valve disposed between the outdoor expansion valve and the indoor heat exchanger; the outdoor heat exchanger dividing a plurality of internal flow paths differently and connecting to the indoor unit or the hot water supply unit via a plurality of independent loops; the plurality of loops including an air conditioning loop and a hot water supply loop; in the air conditioning loop, refrigerant circulates between the outdoor heat exchanger and the indoor unit; in the hot water supply loop, refrigerant circulates between the outdoor heat exchanger and the hot water supply unit.

[0035] Invention Effects

[0036] According to at least one embodiment of the present invention, a heat pump capable of simultaneously performing air conditioning and hot water supply at low cost can be provided.

[0037] According to at least one embodiment of the present invention, different condensing temperatures can be formed when operating simultaneously, which not only enables simultaneous operation of cooling operation and hot water supply operation, but also enables simultaneous operation of heating operation and hot water supply operation more effectively.

[0038] According to at least one embodiment of the present invention, the hot water capacity can be varied through simple operation as needed.

[0039] On the other hand, various other effects will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention described later. Attached Figure Description

[0040] Figure 1 This is a diagram illustrating the configuration of a heat pump according to an embodiment of the present invention.

[0041] Figure 2 The figure is referred to in the description of the cooling and hot water supply operation of the heat pump in the embodiment of the present invention.

[0042] Figure 3 The figure is referred to in the description of the operation of the heat pump for heating and hot water supply in the embodiments of the present invention.

[0043] Figure 4 The figure is referenced in the description of the cooling operation of the heat pump in this embodiment of the invention.

[0044] Figure 5 The figure is referred to in the description of the heating operation of the heat pump in the embodiment of the present invention.

[0045] Figure 6 The figure is referred to in the description of the operation of the heat pump for hot water supply in an embodiment of the present invention.

[0046] Figure 7 The figure is referenced in the description of a heat exchanger according to an embodiment of the present invention.

[0047] Figure 8 This is a diagram illustrating the configuration of a heat pump according to an embodiment of the present invention. Detailed Implementation

[0048] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, the present invention is not limited to these embodiments, and can of course be modified in many other ways.

[0049] In the accompanying drawings, parts irrelevant to the description have been omitted for clarity and brevity, and the same reference numerals have been used for the same or very similar parts throughout the specification.

[0050] Furthermore, in this specification, terms such as "first," "second," etc., may be used to describe multiple elements, but such elements are not limited to these terms. These terms are used only to distinguish one element from another.

[0051] The terminology used in this specification is for illustrative purposes and is not intended to limit the invention. In this specification, unless otherwise expressly stated, singular forms include plural forms. The terms "comprises" and / or "comprising" as used in this specification do not exclude the presence or addition of one or more other constituent elements, steps, and / or actions mentioned.

[0052] In this invention, compared with the single piping type (refer to...) Figure 1 ) or multiple piping types (refer to) Figure 8 Regardless of the connecting piping, the loop, which is the structure for refrigerant circulation, can be independently constructed as an air conditioning side and a hot water supply side.

[0053] Therefore, the heat pump of this embodiment can independently perform air conditioning operation (cooling or heating) and hot water supply operation. The heat pump can perform cooling operation, heating operation, or hot water supply operation independently. Furthermore, the heat pump can operate simultaneously in cooling and hot water supply operation, or simultaneously in heating and hot water supply operation.

[0054] Therefore, a heat pump according to an embodiment of the present invention may include an outdoor heat exchanger for a hot water supply circuit for hot water supply and an outdoor heat exchanger for an air conditioning circuit for air conditioning (see reference). Figure 1 , Figure 8 ).

[0055] Alternatively, in one embodiment of the heat pump, a portion of the outdoor heat exchanger can be incorporated into the hot water supply circuit. In this case, the hot water supply circuit can be integrally formed as a section of the outdoor heat exchanger (see reference). Figure 7 ( ), can also form part of the end of multiple columns, or part of the end of a column.

[0056] Figure 1 This is a diagram illustrating the configuration of a heat pump according to an embodiment of the present invention.

[0057] Reference Figure 1 According to one embodiment of the present invention, the heat pump includes an outdoor unit 10, one or more indoor units 20 connected to the outdoor unit 10 via refrigerant piping, and a hot water supply unit 30 connected to the outdoor unit 10 via refrigerant piping.

[0058] The outdoor unit 10 includes an outdoor heat exchanger 11, an outdoor compressor 13, and an outdoor expansion valve 17. At least one indoor unit 20 installed indoors each includes an indoor heat exchanger 21.

[0059] The outdoor heat exchanger 11 is connected to the indoor unit 20 and the hot water supply unit 30 via a plurality of independent loops. The loops include an air conditioning loop and a hot water supply loop. In the air conditioning loop, refrigerant circulates between the outdoor heat exchanger 11 and the indoor unit 20. In the hot water supply loop, refrigerant circulates between the outdoor heat exchanger 11 and the hot water supply unit 30.

[0060] Therefore, the outdoor heat exchanger 11 is configured to prevent the refrigerant circulating in the air conditioning circuit from mixing with the refrigerant circulating in the hot water supply circuit. As a result, air conditioning operation and hot water supply operation do not interfere with each other and can be performed independently. Alternatively, the refrigerant can circulate separately in the air conditioning circuit and the hot water supply circuit, allowing air conditioning operation and hot water supply operation to be performed simultaneously.

[0061] The outdoor heat exchanger 11 may include a first outdoor heat exchanger 11a and a second outdoor heat exchanger 11b. The first outdoor heat exchanger 11a is connected to the indoor unit 10, and the second outdoor heat exchanger 11b is connected to the hot water supply unit 30. The first outdoor heat exchanger 11a is included in the air conditioning circuit, and the second outdoor heat exchanger 11b is included in the hot water supply circuit.

[0062] The first outdoor heat exchanger 11a and the second outdoor heat exchanger 11b can be arranged one above the other. Alternatively, the first outdoor heat exchanger 11a and the second outdoor heat exchanger 11b can be arranged separately.

[0063] In another embodiment, the outdoor heat exchanger 11 can be separated from a heat exchanger (see reference). Figure 7 The multiple internal flow paths of the outdoor heat exchanger 11c are divided into a hot water supply circuit and an air conditioning circuit. The hot water supply circuit and the air conditioning circuit can be used to divide and connect the multiple internal flow paths of the outdoor heat exchanger 11c to the indoor unit 10 or the hot water supply unit 30. Thus, the refrigerant for hot water supply in the hot water supply circuit and the refrigerant for air conditioning in the air conditioning circuit do not need to be mixed.

[0064] The outdoor heat exchanger 11a allows for heat exchange between the refrigerant and outdoor air. The direction of heat transfer between the refrigerant and outdoor air in the outdoor heat exchanger 11a can vary depending on the air conditioning operating mode.

[0065] The outdoor unit 10 also includes a switching valve 14, which selectively directs the refrigerant discharged from the outdoor compressor 13 to the indoor heat exchanger 21 or the outdoor heat exchanger 11a (11). The flow direction of the refrigerant in the air conditioning circuit can be controlled by the switching valve 14, which switches according to the air conditioning operating mode.

[0066] During cooling operation, the switching valve 14 can direct the refrigerant discharged from the outdoor compressor 13 to the outdoor heat exchanger 11a (11); during heating operation, the switching valve 14 can direct the refrigerant discharged from the outdoor compressor 13 to the indoor heat exchanger 21.

[0067] A discharge pipe 43, serving as a high-pressure connection pipe, is connected to the discharge section 41 of the outdoor compressor 13. The discharge pipe 43 is connected to the outdoor heat exchanger 11 via a switching valve 14. The discharge pipe 43 allows the refrigerant discharged from the outdoor compressor 13 to flow to the outdoor heat exchanger 11.

[0068] The first outdoor heat exchanger 11a is connected to the switching valve 14 via a discharge pipe 43. In the first outdoor heat exchanger 11a, the refrigerant is condensed or evaporated through heat exchange with the outside air. During cooling operation, the first outdoor heat exchanger 11a functions as a condenser, and during heating operation, the first outdoor heat exchanger 11a functions as an evaporator.

[0069] On the other hand, to facilitate smoother heat exchange, the outdoor fan 12 directs air into the outdoor heat exchanger 11. The outdoor fan 12 can be positioned on one side of the outdoor heat exchanger 11 to regulate the amount of air supplied to it. For example, the outdoor heat exchanger 11 may include a first outdoor heat exchanger 11a located on an upper side and a second outdoor heat exchanger 11b located on a lower side. The outdoor fan 12 can be positioned on one side of the first outdoor heat exchanger 11a and the second outdoor heat exchanger 11b.

[0070] The hot water supply unit 30 includes a water tank 31 for containing water and a hot water supply heat exchanger 33. The hot water supply heat exchanger 33 facilitates heat exchange between the water and the refrigerant. The water tank 31 is connected to an inlet pipe 36a and an outlet pipe 36b. The inlet pipe 36a supplies water to the water tank 31, and the outlet pipe 36b discharges the heated water from the water tank 31.

[0071] A water inlet pipe 36a can be formed at the lower part of the water tank 31 to supply water to the water tank 31. The end of the water inlet pipe 36a can be recessed into the water heater 1 or protrude outward from the water heater 1. The water inlet pipe 36a is formed into a structure in which a water supply source such as a flexible hose can be inserted or connected, and when connected to a water supply source, water can be supplied to the interior of the water tank 31.

[0072] A water outlet pipe 36b for discharging water heated in the water tank 31 can be formed on the upper part of the water tank 31. The end of the water outlet pipe 36b can be recessed into the water heater 1 or protrude outward from the water heater 1. The water outlet pipe 36b is configured to be a flexible hose or other structure into which a water supply source can be inserted or connected, and is connected to a water supply source to discharge water heated in the water tank 31 to the hot water demand end.

[0073] A hot water supply heat exchanger 33 can be disposed on the outer wall of a water tank 31 located indoors. The hot water supply heat exchanger 33 can be wound around the outer wall of the water tank 31 in a coil shape. The hot water supply heat exchanger 33 can be configured to have a minimum spacing for heat exchange with the water inside the water tank 31, or it can be configured to be attached to the outer wall of the water tank 31. In such a hot water supply heat exchanger 33, the piping for refrigerant flow is wound into a coil shape outside the water tank 31, thereby increasing the contact area and enabling more efficient heat exchange.

[0074] The heat exchange between the water tank 31 and the hot water supply heat exchanger 33 is achieved through the heat exchange between the refrigerant flowing in the hot water supply heat exchanger 33 and the water inside the water tank 31. The hot water supply heat exchanger 33 acts as a condenser.

[0075] The hot water supply circuit includes a hot water supply inlet pipe 42 and a hot water supply outlet pipe 47. The hot water supply inlet pipe 42 is used for the return of refrigerant from the outdoor unit 10, and the hot water supply outlet pipe 47 is used for the flow of liquid refrigerant that has been condensed after heat exchange with the water tank 31.

[0076] To independently form a hot water supply circuit, the hot water supply unit 30 also includes a hot water supply compressor 34 and a hot water supply expansion valve 35. The hot water supply compressor 34 compresses and discharges refrigerant, and the hot water supply expansion valve 35 expands the refrigerant passing through the hot water supply compressor 34. In the hot water supply heat exchanger 33, one end can be connected to the hot water supply compressor 34, and the other end can be connected to the hot water supply expansion valve 35. The hot water supply compressor 34 and the hot water supply expansion valve 35 can be configured in the mechanical compartment 32 on the upper side of the water tank 31.

[0077] According to one embodiment of the present invention, the hot water supply compressor 34, the hot water supply expansion valve 35, and the outer wall coil water tank 31 of the hot water supply circuit can be manufactured as a single unit.

[0078] The outdoor compressor 13 can be a variable frequency compressor that allows for variable refrigerant compression capacity. The outdoor compressor 13 can use a variable frequency compressor that can adjust the operating frequency to control the refrigerant dosage and refrigerant discharge pressure, thereby handling various cooling and heating loads.

[0079] The hot water supply compressor 34 can be a constant-speed compressor with a constant refrigerant compression capacity. As a hot water supply compressor 34 capable of handling hot water supply loads within a specified range, a relatively inexpensive constant-speed compressor can be used.

[0080] In addition, the hot water supply compressor 34 can use a cheaper compressor with a smaller capacity than the outdoor compressor 13.

[0081] The hot water supply compressor 34 in the hot water supply circuit can be set to a smaller capacity and can also use a constant speed compressor, thereby reducing material costs.

[0082] Furthermore, the hot water supply expansion valve 35 formed in the discharge section of the hot water supply heat exchanger 33 can be an electronic expansion valve, which regulates the flow rate of refrigerant flowing in the piping of the hot water supply heat exchanger 33, so that the condensed refrigerant flows to the outdoor unit 10 or the indoor unit 20. The hot water supply expansion valve 35 can be installed in the hot water supply discharge piping 47. The hot water supply expansion valve 35 formed in the discharge section of the hot water supply heat exchanger 33 can be an electronic expansion valve, which regulates the flow rate of refrigerant flowing in the piping of the hot water supply heat exchanger 33, so that the condensed refrigerant flows to the outdoor unit 10.

[0083] When the hot water supply compressor 34 is running, the refrigerant can circulate along the hot water supply circuit.

[0084] The hot water supply circuit may include: a hot water supply compressor 34 for compressing refrigerant; a hot water supply heat exchanger 33 for exchanging heat between the high-temperature, high-pressure refrigerant discharged from the hot water supply compressor 34 and the water inside the water tank 31, thereby supplying heat to the water; a hot water supply expansion valve 35 for depressurizing the refrigerant condensed by the hot water supply heat exchanger 33; and an outdoor heat exchanger 11b for exchanging heat between the low-temperature, low-pressure refrigerant depressurized by the hot water supply expansion valve 35 and the outside air, and for evaporation. The refrigerant circulating in the hot water supply circuit exchanges heat with water and air in the hot water supply heat exchanger 33 and the outdoor heat exchanger 11b, which serve as heat exchangers.

[0085] In this way, the heat exchange between the water and the refrigerant inside the water tank 31 can be carried out directly without the need for a separate hydro-kit. Without the need for additional components, the heat exchange is carried out directly instead of multiple times, thereby improving the heat exchange efficiency.

[0086] Multiple indoor units 20 can be connected to one outdoor unit 10, although Figure 1 The diagram shows three indoor units B1, B2, and B3, but is not limited to these. Each of the indoor units B1, B2, and B3 includes an indoor heat exchanger 21. In addition, each of the indoor units B1, B2, and B3 may also include an indoor fan 23.

[0087] like Figure 1 As shown, when three indoor units B1, B2, and B3 are installed, the first indoor heat exchanger 21, the second indoor heat exchanger 21, and the third indoor heat exchanger 21 are respectively connected to the liquid pipe connection piping 44. In addition, a low-pressure connection piping 46 is provided, which allows the refrigerant discharged from the plurality of indoor units B1, B2, and B3 to flow to the outdoor compressor 13.

[0088] Reference Figure 1 The indoor unit 20 may also include an expansion valve 22 disposed between the outdoor expansion valve 17 and the indoor heat exchanger 21. The expansion valve 22 may be located on the liquid pipe connection piping 44 and may also be named an indoor expansion valve.

[0089] In another embodiment, the outdoor unit 10 may further include an expansion valve disposed between the outdoor expansion valve 17 and the indoor heat exchanger 21 (see reference). Figure 8 (19). In this embodiment, since the expansion valve 19 performs the same action as... Figure 1 It has the same function as expansion valve 22, so it can also be named indoor expansion valve.

[0090] In this invention, separating the air conditioning side and the hot water supply side into a dual circuit minimizes refrigerant leakage and minimizes the need for additional ventilation or safety devices.

[0091] Furthermore, according to the present invention, waste heat can be recovered while simultaneously operating cooling and hot water supply, thereby saving electricity costs.

[0092] Furthermore, according to the present invention, heating and hot water supply can be operated simultaneously. When operating simultaneously, different condensers can be used to form different condensing temperatures, thereby enabling the execution of differentiated functions. Furthermore, according to the present invention, by adapting the outer wall coil 33 to the water tank 31, the hot water supply circuit consists only of the refrigerant circuit, thereby eliminating the need for a water pump and a plate heat exchanger, thus reducing material costs.

[0093] Reference Figure 1 According to one embodiment of the present invention, the heat pump includes a hot water supply unit 30, an indoor unit 20, and an outdoor unit 10. The indoor unit 20 includes an indoor heat exchanger 21 and an indoor expansion valve 22.

[0094] The outdoor unit 10 includes a first outdoor heat exchanger 11a connected to the indoor unit 20 and a second outdoor heat exchanger 11b connected to the hot water supply unit 30.

[0095] The outdoor unit 10 and the indoor unit 20 are connected by an air conditioning loop through which the refrigerant circulates between the first outdoor heat exchanger 11a and the indoor unit 20. The outdoor unit 10 and the hot water supply unit 30 are connected by a hot water supply loop through which the refrigerant circulates between the second outdoor heat exchanger 11b and the hot water supply unit 30.

[0096] As will be described later Figure 7 As shown, when the hot water supply circuit and the air conditioning circuit utilize the same heat exchanger 11c, the outdoor heat exchanger 11c divides multiple internal flow paths into different loops, which are connected to the indoor unit 20 or the hot water supply unit 30 via independent loops. The multiple loops include an air conditioning loop and a hot water supply loop. In the air conditioning loop, refrigerant circulates between the outdoor heat exchanger 11c and the indoor unit 20; in the hot water supply loop, refrigerant circulates between the outdoor heat exchanger 11c and the hot water supply unit 30.

[0097] Below, refer to Figures 2 to 6 ,by Figure 1 Taking a heat pump as an example, we will explain in detail the various operations of a heat pump.

[0098] Figure 2The figure referred to in the description of the operation of the heat pump for cooling and hot water supply in the embodiment of the present invention shows the refrigerant flow when cooling and hot water supply are operating simultaneously.

[0099] Reference Figure 2 When the heat pump starts supplying hot water and cooling, the heat exchangers 11 and 33 of the outdoor unit 10 and the hot water supply unit 30 act as condensers, and the indoor heat exchanger 21 of the indoor unit 20 acts as an evaporator.

[0100] In addition, the refrigerant for air conditioning circulates along the air conditioning circuit, and the refrigerant for hot water supply circulates along the hot water supply circuit.

[0101] Specifically, after the outdoor compressor 13 starts, the refrigerant, which becomes a high-pressure gas phase, is delivered to the first outdoor heat exchanger 11a through the switching valve 14. The high-pressure, high-temperature refrigerant delivered to the first outdoor heat exchanger 11a exchanges heat with the outdoor air and condenses into a liquid phase.

[0102] The condensed liquid refrigerant is transferred to the indoor heat exchanger 21 as low-pressure refrigerant through the outdoor expansion valve 17 and the indoor expansion valve 22 of the indoor unit 20 in cooling operation.

[0103] After entering the indoor unit 20, the low-pressure refrigerant evaporates by exchanging heat with the indoor air, thus cooling the indoor air. At the same time, it flows through the low-pressure gas pipe 46 and the switching valve 14 to the input pipe 45 of the outdoor compressor 13, and is then introduced back into the outdoor compressor 13.

[0104] During refrigeration operation, the refrigerant for air conditioning circulates sequentially along the air conditioning circuit through the outdoor compressor 13, switching valve 14, first outdoor heat exchanger 11a, outdoor expansion valve 17, indoor expansion valve 22, indoor heat exchanger 21, low-pressure gas pipe 46, switching valve 14, and outdoor compressor 13.

[0105] After the hot water supply compressor 34 starts, the refrigerant, which becomes a high-pressure gas phase, is delivered to the hot water supply heat exchanger 33. The high-pressure, high-temperature refrigerant delivered to the hot water supply heat exchanger 33 exchanges heat with the water inside the water tank 31, heating the water inside the water tank 31 and condensing it into a liquid phase.

[0106] The condensed liquid refrigerant is transported to the second outdoor heat exchanger 11b via the hot water supply expansion valve 35 and the hot water supply discharge pipe 47. The refrigerant that exchanges heat with the outdoor air in the second outdoor heat exchanger 11b returns to the hot water supply unit 30 via the hot water supply input pipe 42.

[0107] When the hot water supply is in operation, the refrigerant for the hot water supply circulates sequentially along the hot water supply circuit through the hot water supply compressor 34, the hot water supply heat exchanger 33, the hot water supply expansion valve 35, the hot water supply discharge pipe 47, the second outdoor heat exchanger 11b, the hot water supply input pipe 42, and the hot water supply compressor 34.

[0108] Figure 3 The figure is referred to in the description of the heating and hot water supply operation of the heat pump in the embodiment of the present invention.

[0109] Reference Figure 3 When hot water supply and heating operation begin, the heat exchangers 21 and 33 of the indoor unit 20 and the hot water supply unit 30 are operated as condensers, and the outdoor heat exchanger 11 of the outdoor unit 10 is operated as an evaporator.

[0110] Specifically, after the outdoor compressor 13 starts, the refrigerant, now in a high-pressure gaseous phase, is delivered through the switching valve 14 to the indoor heat exchanger 21 of the indoor unit 20, which is in heating operation. The high-pressure, high-temperature refrigerant delivered to the indoor heat exchanger 21 exchanges heat with the indoor air and is cooled into a liquid phase. Thus, the high-pressure, high-temperature refrigerant delivered to the indoor heat exchanger 21 exchanges heat with the indoor air and cools the indoor air, thereby condensing into a liquid phase.

[0111] The condensed liquid refrigerant is transferred to the first outdoor heat exchanger 11a as low-pressure refrigerant through the indoor expansion valve 22 and the outdoor expansion valve 17 of the outdoor unit 10.

[0112] After entering the outdoor unit 10, the low-pressure refrigerant evaporates by exchanging heat with the outdoor air and flows through the switching valve 14 to the input pipe 45 of the outdoor compressor 13, where it is reintroduced into the outdoor compressor 13.

[0113] During heating operation, the refrigerant for air conditioning circulates sequentially along the air conditioning circuit through the outdoor compressor 13, switching valve 14, indoor heat exchanger 21, indoor expansion valve 22, outdoor expansion valve 17, first outdoor heat exchanger 11a, switching valve 14, input piping 45, and outdoor compressor 13.

[0114] The refrigerant for hot water supply does not mix with the refrigerant for air conditioning along the hot water supply circuit and flows independently. During hot water supply operation, the refrigerant circulates sequentially through the hot water supply compressor 34, the hot water supply heat exchanger 33, the hot water supply expansion valve 35, the hot water supply discharge pipe 47, the second outdoor heat exchanger 11b, the hot water supply input pipe 42, and the hot water supply compressor 34.

[0115] Figure 4 The figure referred to in the description of the cooling operation of the heat pump in this embodiment of the invention shows the refrigerant flow when the cooling system is operating alone.

[0116] When the heat pump starts operating independently for cooling, the refrigerant flow is as follows: Figure 4 As shown.

[0117] When cooling-only operation begins, the first outdoor heat exchanger 11a of the outdoor unit 10 operates as a condenser, and the heat exchanger 21 of the indoor unit 20 operates as an evaporator. Because cooling is the sole operating mode, the refrigerant circulates only in the air conditioning circuit. Because cooling is the sole operating mode, the hot water supply compressor 34 does not operate, and the hot water supply refrigerant does not circulate.

[0118] Specifically, after the outdoor compressor 13 starts, the refrigerant, which becomes a high-pressure gas phase, is delivered to the first outdoor heat exchanger 11a through the switching valve 14. In this way, the high-pressure, high-temperature refrigerant delivered to the first outdoor heat exchanger 11a exchanges heat with the outdoor air, thereby condensing into a liquid phase.

[0119] The condensed liquid refrigerant is transferred to the indoor heat exchanger 21 as low-pressure refrigerant through the outdoor expansion valve 17 and the indoor expansion valve 22 of the indoor unit 20 in cooling operation.

[0120] After entering the indoor unit 20, the low-pressure refrigerant exchanges heat with the indoor air and evaporates, thus cooling the indoor air. The refrigerant flows through the low-pressure gas pipe 46, through the switching valve 14, to the input pipe 45 of the outdoor compressor 13, and is then reintroduced into the outdoor compressor 13.

[0121] Figure 5 The figure referred to in the description of the heating operation of the heat pump in this embodiment of the invention shows the refrigerant flow when the heating is operated alone.

[0122] When the heat pump starts operating independently in heating mode, the refrigerant flow is as follows: Figure 5 As shown.

[0123] When heating-only operation begins, the heat exchanger 21 of the indoor unit 20 operates as a condenser, and the first outdoor heat exchanger 11a of the outdoor unit 10 operates as an evaporator. Because it operates solely for heating, the refrigerant circulates only in the air conditioning circuit. Also because it operates solely for heating, the hot water supply compressor 34 does not operate, and the hot water supply refrigerant does not circulate.

[0124] Specifically, after the outdoor compressor 13 starts, the refrigerant, which becomes a high-pressure gas phase, is delivered to at least one indoor heat exchanger 21 through the switching valve 14. In this way, the high-pressure, high-temperature refrigerant delivered to the indoor heat exchanger 21 exchanges heat with the indoor air, thereby condensing into a liquid phase.

[0125] The condensed liquid refrigerant is transferred to the first outdoor heat exchanger 11a as low-pressure refrigerant through the indoor expansion valve 22 and the outdoor expansion valve 17.

[0126] After entering the outdoor unit 10, the low-pressure refrigerant undergoes heat exchange with the outdoor air and evaporates. It then flows through the switching valve 14 to the input pipe 45 of the outdoor compressor 13 and is reintroduced into the outdoor compressor 13.

[0127] Figure 6 The figure referred to in the description of the operation of the heat pump for hot water supply in an embodiment of the present invention shows the refrigerant flow when the hot water supply is operating alone.

[0128] exist Figure 6 When the hot water supply is operating independently, the hot water supply heat exchanger 33 of the hot water supply unit 30 operates as a condenser, and the second heat exchanger 11b of the outdoor unit 10 operates as an evaporator.

[0129] Specifically, after the hot water supply compressor 34 starts, the refrigerant, which becomes a high-pressure gas phase, is directly delivered to the hot water supply heat exchanger 33. In this way, the high-pressure, high-temperature refrigerant delivered to the hot water supply heat exchanger 33 exchanges heat with the water inside the water tank 31, heating the water inside the water tank 31 and condensing it into a liquid phase.

[0130] The condensed liquid refrigerant is transferred to the second outdoor heat exchanger 11b at low pressure through the hot water supply expansion valve 35. The refrigerant that exchanges heat with the outdoor air in the second outdoor heat exchanger 11b returns to the hot water supply unit 30.

[0131] Because the hot water supply operates independently, the refrigerant only circulates in the hot water supply circuit. Since the hot water supply operates independently, the outdoor compressor 13 does not operate, and the air conditioning refrigerant does not circulate.

[0132] Figure 7 The figure is referenced in the description of a heat exchanger according to an embodiment of the present invention.

[0133] Reference Figure 7 The hot water supply circuit and the air conditioning circuit can divide the multiple internal flow paths of the outdoor heat exchanger 11c (11) into different parts and connect them to the indoor unit 20 or the hot water supply unit 30.

[0134] The air conditioning circuit may include: a manifold 73 connected to the outdoor compressor 13; a distributor 71 connected to the outdoor expansion valve 17 side; and a plurality of branch pipes 72 connected to the distributor 71. The distributor 71 and the manifold 73 may provide a flow path for connection to the outdoor heat exchanger 11c.

[0135] Reference Figure 7Pipes 42 and 47 for a hot water supply circuit are connected to the beginning and end of one column of outdoor heat exchanger 11c. The entire column can be included in the hot water supply circuit, and at least a portion of another column can be included in the air conditioning circuit. Thus, the hot water supply circuit and the air conditioning circuit are constructed independently of each other to prevent refrigerant mixing.

[0136] The heat exchanger included in the air conditioning circuit and / or the terminals are as follows: Figures 1 to 6 The first heat exchanger 11a is described in operation. The heat and / or terminals of the heat exchanger included in the hot water supply circuit are as shown in reference. Figures 1 to 6 The second heat exchanger 11b is described in operation.

[0137] Figure 7 This is a conceptual diagram illustrating one example of the heat exchanger configuration. The invention is not limited to this; the hot water supply circuit and the air conditioning circuit can be configured as separate circuits with the refrigerants not mixed. For example, the hot water supply circuit can also form part of one end of one column of the outdoor heat exchanger 11c. Alternatively, the hot water supply circuit can also form part of one column of the outdoor heat exchanger 11c.

[0138] Figure 8 This is a diagram illustrating the configuration of a heat pump according to an embodiment of the present invention.

[0139] Figures 1 to 6 Example of a single-piping heat pump, Figure 8 Example of a multi-piping heat pump.

[0140] Reference Figure 8 The outdoor unit 10 includes an expansion valve 19 disposed between the outdoor expansion valve 17 and the indoor heat exchanger 21. In this embodiment, Figure 8 The expansion valve 19 performs the operation with Figure 1 The expansion valve 22 has the same function, the difference being... Figure 8 The expansion valve 19 is included in the outdoor unit 10.

[0141] Therefore, as Figure 8 As shown, the outdoor unit 10 and the indoor unit 20 are connected by an air conditioning loop (Loop) through which the refrigerant circulates between the first outdoor heat exchanger 11a and the indoor unit 20, and the outdoor unit 10 and the hot water supply unit 30 are connected by a hot water supply loop (Loop) through which the refrigerant circulates between the second outdoor heat exchanger 11b and the hot water supply unit 30.

[0142] In addition, Figure 7In the embodiment utilizing the outdoor heat exchanger 11c, the outdoor heat exchanger 11c divides a plurality of internal flow paths differently, connecting to the indoor unit 20 or the hot water supply unit 30 via a plurality of independent loops. The plurality of loops includes an air conditioning loop and a hot water supply loop. In the air conditioning loop, refrigerant circulates between the outdoor heat exchanger 11c and the indoor unit 20; in the hot water supply loop, refrigerant circulates between the outdoor heat exchanger 11c and the hot water supply unit 30.

[0143] Reference Figure 8 When the cooling / hot water supply is operating simultaneously or when the cooling is operating alone, the refrigerant for air conditioning circulates sequentially along the air conditioning circuit through the outdoor compressor 13, switching valve 14, first outdoor heat exchanger 11a, outdoor expansion valve 17, indoor expansion valve 19, indoor heat exchanger 21, low-pressure gas pipe 46, switching valve 14, and outdoor compressor 13.

[0144] When heating / hot water supply is operating simultaneously or heating is operating alone, the refrigerant for air conditioning circulates sequentially along the air conditioning circuit through the outdoor compressor 13, switching valve 14, indoor heat exchanger 21, indoor expansion valve 19, outdoor expansion valve 17, first outdoor heat exchanger 11a, switching valve 14, input piping 45, and outdoor compressor 13.

[0145] When the cooling / hot water supply is operating simultaneously, or the heating / hot water supply is operating simultaneously, or the hot water supply is operating, the refrigerant for the hot water supply circulates sequentially along the hot water supply circuit through the hot water supply compressor 34, the hot water supply heat exchanger 33, the hot water supply expansion valve 35, the hot water supply discharge pipe 47, the second outdoor heat exchanger 11b, the hot water supply input pipe 42, and the hot water supply compressor 34.

[0146] As described above, heat pumps can operate in various modes. The heat pump according to the present invention can not only recover waste heat by simultaneously supplying hot water and cooling, but also achieve different condensing temperatures when supplying hot water and heating simultaneously, thus enabling more efficient simultaneous operation.

[0147] Furthermore, according to the present invention, since the increased refrigerant charge due to the addition of hot water supply is distributed into a separate refrigerant circuit independent of the air conditioning circuit, it has the advantage of minimizing refrigerant leakage. This reduces the need for additional ventilation devices or refrigerant blocking / sensing devices, saving manufacturing costs.

[0148] Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications can be made by those skilled in the art without departing from the spirit of the invention as claimed in the claims, and these modifications should not be understood separately from the technical concept or prospect of the present invention.

Claims

1. A heat pump, wherein, include: A hot water supply unit includes a water tank for containing water and a hot water supply heat exchanger, wherein the hot water supply heat exchanger allows the water to exchange heat with a refrigerant; At least one indoor unit, disposed indoors, the indoor unit including an indoor heat exchanger; and The outdoor unit is connected to the indoor unit and the hot water supply unit via refrigerant piping. The outdoor unit includes an outdoor heat exchanger, an outdoor compressor, and an outdoor expansion valve. The outdoor heat exchanger is connected to the indoor unit and the hot water supply unit via a plurality of independent loops; The plurality of said circuits include an air conditioning circuit and a hot water supply circuit; In the air conditioning circuit, the refrigerant circulates between the outdoor heat exchanger and the indoor unit; In the hot water supply circuit, refrigerant circulates between the outdoor heat exchanger and the hot water supply unit.

2. The heat pump according to claim 1, wherein, The hot water supply unit also includes: Hot water supplies the compressor, which compresses and releases the refrigerant; and A hot water supply expansion valve causes the refrigerant passing through the hot water supply heat exchanger to expand.

3. The heat pump according to claim 2, wherein, The hot water supply compressor and the hot water supply expansion valve are located in the mechanical compartment on the upper side of the water tank.

4. The heat pump according to claim 2, wherein, The hot water supply heat exchanger is wound around the outer wall of the water tank. One end of the hot water supply heat exchanger is connected to the hot water supply compressor, and the other end of the hot water supply heat exchanger is connected to the hot water supply expansion valve.

5. The heat pump according to claim 2, wherein, The outdoor compressor is a variable frequency compressor that allows for variable refrigerant compression capacity. The hot water supply compressor is a constant-speed compressor with a constant refrigerant compression capacity.

6. The heat pump according to claim 2, wherein, The capacity of the hot water supply compressor is smaller than that of the outdoor compressor.

7. The heat pump according to claim 1, wherein, The outdoor heat exchanger includes: A first outdoor heat exchanger is connected to the indoor unit; and The second outdoor heat exchanger is connected to the hot water supply unit.

8. The heat pump according to claim 7, wherein, The outdoor unit also includes an outdoor fan. The outdoor fan is located on one side of the first outdoor heat exchanger and the second outdoor heat exchanger.

9. The heat pump according to claim 8, wherein, The first outdoor heat exchanger and the second outdoor heat exchanger are arranged one above the other.

10. The heat pump according to claim 7, wherein, The first outdoor heat exchanger and the second outdoor heat exchanger are configured separately.

11. The heat pump according to claim 1, wherein, The plurality of said loops divide the plurality of internal flow paths of the outdoor heat exchanger differently and connect to the indoor unit or the hot water supply unit.

12. The heat pump according to claim 11, wherein, The air conditioning circuit includes: The manifold is connected to the outdoor compressor; Distributor, connected to the outdoor expansion valve side; and Multiple branch pipes are connected to the distributor.

13. The heat pump according to claim 1, wherein, The outdoor unit also includes a switching valve. The switching valve selectively directs the refrigerant discharged from the outdoor compressor to either the indoor heat exchanger or the outdoor heat exchanger.

14. The heat pump according to claim 13, wherein, During cooling operation, the switching valve directs the refrigerant discharged from the outdoor compressor to the outdoor heat exchanger. During heating operation, the switching valve directs the refrigerant discharged from the outdoor compressor to the indoor heat exchanger.

15. The heat pump according to claim 1, wherein, The indoor unit also includes an expansion valve. The expansion valve is positioned between the outdoor expansion valve and the indoor heat exchanger.

16. The heat pump according to claim 1, wherein, The outdoor unit also includes an expansion valve. The expansion valve is positioned between the outdoor expansion valve and the indoor heat exchanger.

17. A heat pump, wherein, include: A hot water supply unit includes a water tank for containing water and a hot water supply heat exchanger, wherein the hot water supply heat exchanger allows the water to exchange heat with a refrigerant; At least one indoor unit is installed indoors, the indoor unit including an indoor heat exchanger and an indoor expansion valve; as well as The outdoor unit includes a first outdoor heat exchanger connected to the indoor unit, a second outdoor heat exchanger connected to the hot water supply unit, an outdoor compressor, and an outdoor expansion valve; The outdoor unit and the indoor unit are connected by an air conditioning circuit, in which the refrigerant circulates between the first outdoor heat exchanger and the indoor unit; The outdoor unit and the hot water supply unit are connected by a hot water supply circuit, in which the refrigerant circulates between the second outdoor heat exchanger and the hot water supply unit.

18. A heat pump, wherein, include: A hot water supply unit includes a water tank for containing water and a hot water supply heat exchanger, wherein the hot water supply heat exchanger allows the water to exchange heat with a refrigerant; At least one indoor unit is installed indoors, the indoor unit including an indoor heat exchanger and an indoor expansion valve; as well as The outdoor unit includes an outdoor heat exchanger, an outdoor compressor, and an outdoor expansion valve connected to the indoor unit and the hot water supply unit; The outdoor heat exchanger divides multiple internal flow paths differently and connects to the indoor unit or the hot water supply unit using multiple independent loops; The plurality of said circuits include an air conditioning circuit and a hot water supply circuit; In the air conditioning circuit, the refrigerant circulates between the outdoor heat exchanger and the indoor unit; In the hot water supply circuit, refrigerant circulates between the outdoor heat exchanger and the hot water supply unit.

19. A heat pump, wherein, include: A hot water supply unit includes a water tank for containing water and a hot water supply heat exchanger, wherein the hot water supply heat exchanger allows the water to exchange heat with a refrigerant; At least one indoor unit, disposed indoors, the indoor unit including an indoor heat exchanger; and The outdoor unit includes a first outdoor heat exchanger connected to the indoor unit, a second outdoor heat exchanger connected to the hot water supply unit, an outdoor compressor, an outdoor expansion valve, and an expansion valve disposed between the outdoor expansion valve and the indoor heat exchanger. The outdoor unit and the indoor unit are connected by an air conditioning circuit, in which the refrigerant circulates between the first outdoor heat exchanger and the indoor unit; The outdoor unit and the hot water supply unit are connected by a hot water supply circuit, in which the refrigerant circulates between the second outdoor heat exchanger and the hot water supply unit.

20. A heat pump, wherein, include: A hot water supply unit includes a water tank for containing water and a hot water supply heat exchanger, wherein the hot water supply heat exchanger allows the water to exchange heat with a refrigerant; At least one indoor unit, disposed indoors, the indoor unit including an indoor heat exchanger; and The outdoor unit includes an outdoor heat exchanger connected to the indoor unit and the hot water supply unit, an outdoor compressor, an outdoor expansion valve, and an expansion valve disposed between the outdoor expansion valve and the indoor heat exchanger; The outdoor heat exchanger divides its internal flow paths into multiple distinct sections, each connected to the indoor unit or the hot water supply unit via a separate set of loops. The plurality of said circuits include an air conditioning circuit and a hot water supply circuit; In the air conditioning circuit, the refrigerant circulates between the outdoor heat exchanger and the indoor unit; In the hot water supply circuit, refrigerant circulates between the outdoor heat exchanger and the hot water supply unit.

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