Heat pump system
The heat pump system, with its dual refrigerant circulation system and dual water tank design, solves the problem that existing heat pump systems cannot simultaneously provide high-temperature and low-temperature hot water, thus meeting various water needs and saving energy.
Patent Information
- Application Number
- CN202520299674.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing heat pump systems cannot simultaneously meet the demand for producing both high-temperature and low-temperature hot water, nor can they meet the diverse water needs of specific locations such as slaughterhouses.
It adopts a dual refrigerant circulation system and a dual water tank design. The first and second refrigerant circulation systems operate separately or together, combined with low-temperature water tanks and high-temperature water tanks, to achieve independent or combined heating of low-temperature hot water and high-temperature hot water. The flow path switching is controlled by solenoid valves to ensure that different temperature requirements are met.
It enables the simultaneous supply of both low-temperature and high-temperature hot water, saving energy, reducing heat loss, and meeting the needs of various water usage scenarios.
Smart Images
Figure CN223769055U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heat pump technology, and more particularly to a heat pump system. Background Technology
[0002] In certain locations, such as slaughterhouses, high-temperature hot water of 70℃ to 85℃ is needed to meet production requirements, while there is also a demand for low-temperature hot water of 50℃ for domestic use. Most current heat pump systems can only meet one temperature of hot water demand and cannot simultaneously meet the needs for both high-temperature and low-temperature hot water. Utility Model Content
[0003] This application provides a heat pump system that can simultaneously meet the water demand for both low-temperature and high-temperature hot water.
[0004] A heat pump system includes: a first refrigerant circulation system, a second refrigerant circulation system, and a hot water system; in the first refrigerant circulation system, a first compressor, a first heat exchange channel, a first expansion valve, and a first heat exchanger are connected in series in sequence through refrigerant pipelines to form a loop; a third heat exchange channel is connected in parallel with the first heat exchange channel; a first solenoid valve is connected in series in the branch where the third heat exchange channel is located;
[0005] In the second refrigerant cycle system, the second compressor, the fifth heat exchange channel, the second expansion valve and the fourth heat exchange channel are connected in series to form a loop through refrigerant pipelines;
[0006] In the hot water system, the second heat exchange channel and the sixth heat exchange channel are connected in series through water pipes to form a heating flow path, and the low temperature water tank and the high temperature water tank are connected in parallel and then connected in series with the heating flow path to form a loop.
[0007] The refrigerant in the first heat exchange channel exchanges heat with the water in the second heat exchange channel.
[0008] The refrigerant in the third heat exchange channel exchanges heat with the refrigerant in the fourth heat exchange channel;
[0009] The refrigerant in the fifth heat exchange channel exchanges heat with the water in the sixth heat exchange channel.
[0010] When producing low-temperature hot water, the first refrigerant circulation system is running, the first solenoid valve is disconnected, and the first refrigerant circulation system transfers heat to the hot water system through the first heat exchange channel and the second heat exchange channel.
[0011] When producing high-temperature hot water, both the first refrigerant circulation system and the second refrigerant circulation system are in operation, the first solenoid valve is connected, the first refrigerant circulation system transfers heat to the hot water system through the first heat exchange channel and the second heat exchange channel, and the second refrigerant circulation system transfers heat to the hot water system through the fifth heat exchange channel and the sixth heat exchange channel.
[0012] In this technical solution, through the first refrigerant circulation system, the high-temperature refrigerant in the first heat exchange channel can transfer heat to the water in the second heat exchange channel, thereby heating the water in the hot water system to meet the demand for producing low-temperature hot water; through the first refrigerant circulation system and the second refrigerant circulation system, the water is heated twice to meet the demand for high-temperature hot water; the high-temperature water tank can produce high-temperature hot water, and the low-temperature water tank can produce low-temperature hot water, thereby meeting the user's water demand for both low-temperature and high-temperature hot water.
[0013] In addition, the high-temperature water tank can also produce low-temperature hot water. When users do not need high-temperature hot water, the high-temperature water tank can maintain the temperature of low-temperature hot water, reducing heat loss and saving energy.
[0014] In some embodiments, the first heat exchange channel and the second heat exchange channel constitute a first heat exchange module; the third heat exchange channel and the fourth heat exchange channel constitute a second heat exchange module; and the fifth heat exchange channel and the sixth heat exchange channel constitute a third heat exchange module.
[0015] In this technical solution, the two heat exchange channels that need to exchange heat are implemented in the form of heat exchange modules, which can ensure the heat exchange efficiency of the two channels.
[0016] In some embodiments, the first heat exchange module, the second heat exchange module, and the third heat exchange module are integrated on a plate heat exchanger.
[0017] In this technical solution, the heat exchange module is integrated on the plate heat exchanger, which reduces the number of components and is beneficial for product design and layout.
[0018] In some embodiments, the first compressor, the first expansion valve, and the first heat exchanger are located in the outdoor unit; the second compressor, the second expansion valve, and the plate heat exchanger are located in the indoor unit.
[0019] In this technical solution, the components of the two refrigerant cycle systems are placed in the outdoor unit and the indoor unit, which facilitates product installation.
[0020] In some embodiments, in the hot water system, a third solenoid valve and a fourth solenoid valve are connected in series on the inlet and outlet sides of the branch where the low-temperature water tank is located, respectively; a fifth solenoid valve and a sixth solenoid valve are connected in series on the inlet and outlet sides of the branch where the high-temperature water tank is located, respectively.
[0021] When the low-temperature water tank is producing low-temperature hot water, the third and fourth solenoid valves are in the conducting state, and the fifth and sixth solenoid valves are in the disconnected state.
[0022] When the high-temperature water tank produces high-temperature hot water or low-temperature hot water, the third and fourth solenoid valves are in the off state, and the fifth and sixth solenoid valves are in the on state.
[0023] In this technical solution, the connection and disconnection of the branch circuit containing the two water tanks are achieved by using a solenoid valve, which can separate the low-temperature water tank that produces low-temperature hot water and the high-temperature water tank that produces high-temperature hot water.
[0024] In some embodiments, a first water pump is connected to the heating flow path, which causes water to flow from the second heat exchange channel to the sixth heat exchange channel.
[0025] In this technical solution, the first water pump can control the flow direction of the water, so that the water is first heated once through the second heat exchange channel, and then heated a second time through the sixth heat exchange channel.
[0026] In some embodiments, the system further includes: a first water supply pipeline connected to the inlet of the low-temperature water tank; a first water outlet pipeline connected to the outlet of the low-temperature water tank; a second water supply pipeline connected to the inlet of the high-temperature water tank; a second water outlet pipeline connected to the outlet of the high-temperature water tank; a first bypass pipeline, the inlet of which is connected to the first water outlet pipeline and the outlet of which is connected to the second water supply pipeline; and a first bypass valve connected to the first bypass pipeline for connecting or disconnecting the first bypass pipeline. When the first bypass valve is in the open state, water from the low-temperature water tank is supplied to the high-temperature water tank through the first bypass pipeline.
[0027] In this technical solution, by setting up a first bypass pipeline, water can be supplied from the low-temperature water tank to the high-temperature water tank, thus meeting the user's urgent need for high-temperature hot water.
[0028] In some embodiments, it further includes: a second bypass pipeline, the inlet end of which is connected to a second outlet pipeline and the outlet end of which is connected to a first replenishment pipeline; a second bypass valve, connected to the second bypass pipeline, for connecting or disconnecting the second bypass pipeline; when the second bypass valve is in the open state, water from the high-temperature water tank is supplied to the low-temperature water tank through the second bypass pipeline.
[0029] In this technical solution, by setting up a second bypass pipeline, water can be replenished from the high-temperature water tank to the low-temperature water tank.
[0030] In some embodiments, the system further includes: a second water pump connected to the first water outlet pipe and located between the outlet of the low-temperature water tank and the inlet of the first bypass pipe; and a third water pump connected to the second water outlet pipe and located between the outlet of the high-temperature water tank and the inlet of the second bypass pipe.
[0031] In this technical solution, the installation of the second and third water pumps can ensure the direction of water flow for replenishment.
[0032] In some embodiments, different refrigerants circulate within the first refrigerant circulation system and the second refrigerant circulation system.
[0033] In this technical solution, different refrigerants are used in the two refrigerant circulation systems, which can meet the different heating capacity requirements of the two systems. Attached Figure Description
[0034] Figure 1 A schematic diagram of a heat pump system according to some embodiments is shown;
[0035] Figure 2 A schematic diagram of a first refrigerant circulation system in a heat pump system according to some embodiments is shown;
[0036] Figure 3 A schematic diagram of a second refrigerant circulation system in a heat pump system according to some embodiments is shown;
[0037] Figure 4 A schematic diagram of a hot water system in a heat pump system according to some embodiments is shown;
[0038] Figures 5 to 8 A schematic diagram of the water tank in a heat pump system according to some embodiments is shown.
[0039] In the above diagrams, 1. First refrigerant circulation system; 11. First compressor; 12. First expansion valve; 13. First heat exchanger; 14. First solenoid valve; 15. Second solenoid valve; 2. Second refrigerant circulation system; 21. Second compressor; 22. Second expansion valve; 3. Hot water system; 31. Low-temperature water tank; 32. High-temperature water tank; 331. Third solenoid valve; 332. Fourth solenoid valve; 333. Fifth solenoid valve; 334. Sixth solenoid valve; 34. First water pump; 4. Plate heat exchanger. Heat exchanger; 41, First heat exchange module; 42, Second heat exchange module; 43, Third heat exchange module; 51, First water supply pipeline; 511, First water supply valve; 52, First water outlet pipeline; 521, First shut-off valve; 522, Second water pump; 53, Second water supply pipeline; 531, Second water supply valve; 54, Second water outlet pipeline; 541, Second shut-off valve; 542, Third water pump; 55, First bypass pipeline; 551, First bypass valve; 56, Second bypass pipeline; 561, Second bypass valve. Detailed Implementation
[0040] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.
[0041] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0042] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.
[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0044] The embodiments of this application are described below with reference to the accompanying drawings:
[0045] Reference Figure 1 and Figure 2 The heat pump system according to the embodiments of this application includes a first refrigerant circulation system 1.
[0046] The first refrigerant circulation system 1 includes: a first compressor 11 for compressing refrigerant; a first heat exchange channel 41a for exchanging heat with a second heat exchange channel 41b to achieve heat transfer; a first expansion valve 12 for reducing the pressure of the refrigerant; and a first heat exchanger 13 for evaporating the reduced-pressure refrigerant.
[0047] The first compressor 11, the first heat exchange channel 41a, the first expansion valve 12, and the first heat exchanger 13 are connected in series via refrigerant piping to form a circulation loop. Figure 2 The middle arrow indicates the direction of refrigerant flow in the first refrigerant circulation system 1.
[0048] That is, the exhaust end of the first compressor 11 is connected to the inlet end of the first heat exchange channel 41a, the outlet end of the first heat exchange channel 41a is connected to the input end of the first expansion valve 12, the output end of the first expansion valve 12 is connected to the input end of the first heat exchanger 13, and the output end of the first heat exchanger 13 is connected to the suction end of the first compressor 11.
[0049] The first compressor 11 compresses the low-pressure gaseous refrigerant to a high pressure using internal rotational force.
[0050] The high-temperature refrigerant compressed by the first compressor 11 flows through the first heat exchange channel 41a. The second heat exchange channel 41b is connected to the hot water system 3 (described below) and flows with water. The refrigerant in the first heat exchange channel 41a exchanges heat with the water in the second heat exchange channel 41b, so that the heat of the refrigerant in the first heat exchange channel 41a can be transferred to the water in the second heat exchange channel 41b, realizing the heating of water supplied by the first refrigerant circulation system 1 through the first heat exchange channel 41a and the second heat exchange channel 41b.
[0051] The first heat exchange channel 41a and the second heat exchange channel 41b can form a first heat exchange module 41. The first heat exchange module 41 can specifically be a plate heat exchanger.
[0052] The first expansion valve 12 reduces the pressure of the refrigerant by throttling it. As the refrigerant passes through the narrow passage, its pressure decreases without exchanging heat with the outside.
[0053] The first heat exchanger 13 performs heat exchange between the refrigerant and the air. The first heat exchanger 13 may include a refrigerant pipe for the flow of refrigerant; and a heat sink connected to the refrigerant pipe, the heat sink increasing the surface area of the first heat exchanger 13 to improve the heat exchange efficiency between the refrigerant and the air.
[0054] The first refrigerant circulation system 1 may include a fan (not shown) that causes air to blow across the first heat exchanger 13.
[0055] In some embodiments, the first refrigerant circulation system 1 may include a gas-liquid separator, the output of the first heat exchanger 13 is connected to the input of the gas-liquid separator, and the output of the gas-liquid separator is connected to the suction end of the first compressor 11. The gas-liquid separator is used to separate gaseous refrigerant from liquid refrigerant and to deliver the gaseous refrigerant to the first compressor 11.
[0056] In some embodiments, refer to Figure 1 and Figure 3 The heat pump system includes a second refrigerant circulation system 2.
[0057] The second refrigerant circulation system 2 includes: a second compressor 21 for compressing refrigerant; a fifth heat exchange channel 43a for exchanging heat with a sixth heat exchange channel 43b to achieve heat transfer; a second expansion valve 22 for reducing the pressure of the refrigerant; and a second heat exchanger for evaporating the reduced-pressure refrigerant.
[0058] The second compressor 21, the fifth heat exchange channel 43a, the second expansion valve 22, and the second heat exchanger are connected in series through refrigerant pipelines to form a circulation loop.
[0059] That is, the exhaust end of the second compressor 21 is connected to the inlet end of the fifth heat exchange channel 43a, the outlet end of the fifth heat exchange channel 43a is connected to the input end of the second expansion valve 22, the output end of the second expansion valve 22 is connected to the input end of the second heat exchanger, and the output end of the second heat exchanger is connected to the suction end of the second compressor 21.
[0060] The second compressor 21 compresses the low-pressure gaseous refrigerant to a high pressure using internal rotational force.
[0061] The high-temperature refrigerant compressed by the second compressor 21 flows through the fifth heat exchange channel 43a. The sixth heat exchange channel 43b is connected to the hot water system 3 (described below) and flows with water. The refrigerant in the fifth heat exchange channel 43a exchanges heat with the water in the sixth heat exchange channel 43b, so that the heat of the refrigerant in the fifth heat exchange channel 43a can be transferred to the water in the sixth heat exchange channel 43b, realizing the heating of water by the second refrigerant circulation system 2 through the fifth heat exchange channel 43a and the sixth heat exchange channel 43b.
[0062] The fifth heat exchange channel 43a and the sixth heat exchange channel 43b together form the third heat exchange module 43. The third heat exchange module 43 can be a plate heat exchanger.
[0063] The second expansion valve 22 reduces the pressure of the refrigerant by throttling it. As the refrigerant passes through the narrow passage, its pressure decreases without heat exchange with the outside.
[0064] In some embodiments, the second heat exchanger performs heat exchange between the refrigerant and air. The second heat exchanger may include a refrigerant pipe for the flow of refrigerant; and heat sinks connected to the refrigerant pipe, the heat sinks increasing the surface area of the second heat exchanger to improve the efficiency of heat exchange between the refrigerant and air.
[0065] The second refrigerant circulation system 2 may include a fan that causes air to blow across the second heat exchanger.
[0066] In some embodiments, refer to Figure 3 The fourth heat exchange channel 42b replaces the second heat exchanger and is connected to the second refrigerant circulation system 2.
[0067] Figure 3 The middle arrow indicates the direction of refrigerant flow. The discharge end of the second compressor 21 is connected to the inlet end of the fifth heat exchange channel 43a, the outlet end of the fifth heat exchange channel 43a is connected to the input end of the second expansion valve 22, the output end of the second expansion valve 22 is connected to the inlet end of the fourth heat exchange channel 42b, and the outlet end of the fourth heat exchange channel 42b is connected to the suction end of the second compressor 21.
[0068] Combination Figure 2 The third heat exchange channel 42a is connected to the first refrigerant circulation system 1. Specifically, in the first refrigerant circulation system 1, the third heat exchange channel 42a is connected in parallel with the first heat exchange channel 41a.
[0069] The third heat exchange channel 42a and the fourth heat exchange channel 42b exchange heat. The second refrigerant cycle system 2 does not require external energy, thus saving energy.
[0070] The third heat exchange channel 42a and the fourth heat exchange channel 42b can form a second heat exchange module 42. The second heat exchange module 42 can be a plate heat exchanger.
[0071] In some embodiments, continue to refer to Figure 2 The first refrigerant circulation system 1 includes a first solenoid valve 14. The first solenoid valve 14 is connected in series in the branch where the third heat exchange channel 42a is located, and is used to control the on / off state of the branch.
[0072] The first solenoid valve 14 can be located on the inlet side of the third heat exchange channel 42a.
[0073] When the first solenoid valve 14 is in the on state, the third heat exchange channel 42a is connected; when the first solenoid valve 14 is in the off state, the third heat exchange channel 42a is disconnected.
[0074] In some embodiments, refer to Figure 1 and Figure 4 The heat pump system includes a hot water system 3, which is used to provide hot water to users.
[0075] In the hot water system 3, the second heat exchange channel 41b of the first heat exchange module 41 and the sixth heat exchange channel 43b of the third heat exchange module 43 are connected in series through water pipes to form a heating flow path.
[0076] The hot water system 3 includes a low-temperature water tank 31. Heat pipes 31a within the low-temperature water tank 31 are connected in series with the heating flow path. When the hot water in the heating flow path circulates through the low-temperature water tank 31, it raises the temperature of the water within the low-temperature water tank 31.
[0077] The hot water system 3 includes a high-temperature water tank 32. Heat pipes 32a within the high-temperature water tank 32 are connected in series with the heating flow path and in parallel with heat pipes 31a in the low-temperature water tank 31. When the hot water in the heating flow path circulates through the high-temperature water tank 32, the water in the high-temperature water tank 32 can be heated.
[0078] In some embodiments, the refrigerants in the first refrigerant circulation system 1 and the second refrigerant circulation system 2 are different.
[0079] R410A refrigerant flows in the first refrigerant cycle system 1, and R134A refrigerant flows in the second refrigerant cycle system 2.
[0080] When producing low-temperature hot water, the first refrigerant circulation system 1 is running, and the first solenoid valve 14 is in the off state.
[0081] The first compressor 11 operates, compressing R410A refrigerant into a high-temperature gas. The high-temperature gas exchanges heat with the water in the first heat exchange module 41, heating the water and lowering the refrigerant temperature. After passing through the first expansion valve 12 for throttling, the refrigerant vaporizes and absorbs heat in the first heat exchanger 13. After passing through the gas-liquid separator, it re-enters the first compressor 11. This cycle continues, causing the water in the first heat exchange module 41 to heat up.
[0082] When producing high-temperature hot water, the first refrigerant circulation system 1 is in operation and the first solenoid valve 14 is in the conducting state; the second refrigerant circulation system 2 is in operation.
[0083] In the first refrigerant circulation system 1, the first compressor 11 compresses R410A refrigerant into a high-temperature gas. One path of the high-temperature gas exchanges heat with the water in the first heat exchange module 41 to heat the water. The other path of the high-temperature gas exchanges heat with R134A refrigerant in the second heat exchange module 42 to heat the R134A refrigerant. After passing through the first expansion valve 12 for throttling, R410A becomes a low-temperature refrigerant, which vaporizes and absorbs heat in the first heat exchanger 13. After passing through the gas-liquid separator, it re-enters the first compressor 11. This cycle continues, causing the water in the first heat exchange module 41 to heat up.
[0084] In the second refrigerant circulation system 2, the second compressor 21 compresses R1 34A refrigerant into high-temperature gas. The high-temperature gas exchanges heat with the water in the third heat exchange module 43 to heat the water. Then, after passing through the second expansion valve 22 for throttling, it exchanges heat with the high-temperature R41 0A refrigerant gas in the second heat exchange module 42, absorbing heat and increasing its temperature. It then enters the second compressor 21 again. This cycle continues, causing the water in the third heat exchange module 43 to heat up.
[0085] In some embodiments, the first refrigerant circulation system 1 includes a second solenoid valve 15. The second solenoid valve 15 is connected in series in the branch where the first heat exchange channel 41a of the first heat exchange module 41 is located, and is used to control the on / off state of the branch.
[0086] The second solenoid valve 15 can be located on the inlet side of the first heat exchange channel 41a.
[0087] When the second solenoid valve 15 is in the on state, the first heat exchange channel 41a is connected; when the second solenoid valve 15 is in the off state, the first heat exchange channel 41a is disconnected.
[0088] In some embodiments, continue to refer to Figure 4 In the hot water system 3, the inlet and outlet sides of the branch where the low temperature water tank 31 is located are respectively connected in series with a third solenoid valve 331 and a fourth solenoid valve 332.
[0089] The fifth solenoid valve 333 and the sixth solenoid valve 334 are connected in series on the inlet and outlet sides of the branch where the high-temperature water tank 32 is located, respectively.
[0090] When the low-temperature water tank 31 needs to produce low-temperature hot water, the third solenoid valve 331 and the fourth solenoid valve 332 are in the conducting state, while the fifth solenoid valve 333 and the sixth solenoid valve 334 are in the disconnected state.
[0091] Water from the low-temperature water tank 31 enters the second heat exchange channel 41b of the first heat exchange module 41 through the third solenoid valve 331, where it exchanges heat with the high-temperature refrigerant R41 0A in the first refrigerant circulation system 1. Then, it returns to the low-temperature water tank 31 through the third heat exchange module 43 and the fourth solenoid valve 332 to heat the water in the low-temperature water tank 31.
[0092] When the high-temperature water tank 32 needs to produce low-temperature hot water, the third solenoid valve 331 and the fourth solenoid valve 332 are in the off state, while the fifth solenoid valve 333 and the sixth solenoid valve 334 are in the on state.
[0093] Water from the high-temperature water tank 32 enters the second heat exchange channel 41b of the first heat exchange module 41 through the fifth solenoid valve 333, where it exchanges heat with the high-temperature refrigerant R41 0A in the first refrigerant circulation system 1. Then, it returns to the high-temperature water tank 32 through the third heat exchange module 43 and the sixth solenoid valve 334 to heat the water in the high-temperature water tank 32.
[0094] When the high-temperature water tank 32 needs to produce high-temperature hot water, the third solenoid valve 331 and the fourth solenoid valve 332 are in the off state, and the fifth solenoid valve 333 and the sixth solenoid valve 334 are in the on state.
[0095] Water from the high-temperature water tank 32 enters the second heat exchange channel 41b of the first heat exchange module 41 through the fifth solenoid valve 333, where it exchanges heat with the high-temperature refrigerant R41 0A in the first refrigerant circulation system 1. Then, it passes through the sixth heat exchange channel 43b of the third heat exchange module 43 and exchanges heat with the high-temperature refrigerant R1 34A in the second refrigerant circulation system 2, absorbing heat and rising in temperature again. Finally, it returns to the high-temperature water tank 32 through the sixth solenoid valve 334 to heat the water in the high-temperature water tank 32.
[0096] In this application, by setting up a first refrigerant circulation system 1, the heat of the first refrigerant circulation system 1 can be transferred to water through the first heat exchange module 41, thereby meeting the user's demand for low-temperature hot water; by setting up a second refrigerant circulation system 2, the first refrigerant circulation system 1 and the second refrigerant circulation system 2 work simultaneously, and the refrigerant heat of the two systems can be transferred to water, thereby meeting the user's demand for high-temperature hot water; by setting up a low-temperature water tank 31 and a high-temperature water tank 32, the low-temperature water tank 31 stores low-temperature hot water and the high-temperature water tank 32 stores high-temperature hot water, which can meet the user's demand for both low-temperature hot water and high-temperature hot water at the same time.
[0097] The high-temperature water tank of this application can produce both high-temperature and low-temperature hot water to meet various needs. For example, during the day, the high-temperature water tank 32 produces high-temperature hot water at 70℃ to 85℃ to meet production needs, while the low-temperature water tank 31 produces low-temperature hot water at around 50℃ to meet domestic needs. At night, when users no longer require high-temperature hot water, the high-temperature water tank 32 can maintain a low-temperature hot water temperature of 50℃ to reduce heat loss and save energy.
[0098] In some embodiments, the hot water system 3 further includes a first water pump 34 for circulating water within the hot water system 3. The first water pump 34 is connected in series in the heating flow path.
[0099] The first water pump 34 ensures that the water in the hot water system 3 flows from the second heat exchange channel 41b of the first heat exchange module 41 to the sixth heat exchange channel 43b of the third heat exchange module 43, so that when producing high-temperature hot water, the water can be heated once by the first heat exchange module 41 and then heated a second time by the second heat exchange module 42.
[0100] The first water pump 34 can be installed on the water inlet side of the second heat exchange channel 41b of the first heat exchange module 41.
[0101] In some embodiments, the required capacity Q1 of the first heat exchange module 41 is Q1 = c * m * ΔT1, where m is the mass of water, c is the specific heat capacity of water, and ΔT1 = T 出1 -T 进1 ΔT1 is the temperature difference of the hot water before and after heating by the first heat exchange module 41.
[0102] The required capacity of the third heat exchange module 43 is Q3 = c * m * ΔT2, where m is the mass of water, c is the specific heat capacity of water, and ΔT2 = T 出2 -T 进2 ΔT2 is the temperature difference of the hot water before and after heating by the third heat exchange module 43.
[0103] The required capacity of the second heat exchange module 42 is Q2 = Q3.
[0104] Therefore, the capacity Q of the first refrigerant cycle system 1 R410A =Q1+Q2=c*m*ΔT1+c*m*ΔT2=c*m*(ΔT1+ΔT2), where Q is the capacity of the second refrigerant cycle system 2. R134A =Q3=c*m*ΔT2.
[0105] In some embodiments, the first heat exchange module 41, the second heat exchange module 42, and the third heat exchange module 43 can be integrated into a plate heat exchanger 4 to reduce the number of components and facilitate installation and layout.
[0106] If the first heat exchange module 41, the second heat exchange module 42, and the third heat exchange module 43 are three separate components, then each needs to have its own installation location and installation structure designed, which will increase the complexity of product design and manufacturing.
[0107] In some embodiments, the first compressor 11, the first expansion valve 12, and the first heat exchanger 13 may be located in the outdoor unit.
[0108] The second compressor 21, the second expansion valve 22, and the plate heat exchanger 4 can be installed in the indoor unit.
[0109] In other embodiments, the first compressor 11, the first expansion valve 12, and the first heat exchanger 13 may be located in the indoor unit. The second compressor 21, the second expansion valve 22, and the plate heat exchanger 4 may be located in the outdoor unit.
[0110] In some embodiments, refer to Figures 5 to 8 The low-temperature water tank 31 has a water inlet. External water can enter the low-temperature water tank 31 through the water inlet.
[0111] The heat pump system may include a first water supply line 51. The first water supply line 51 is connected to the inlet of the low-temperature water tank 31. An external water supply system supplies water to the low-temperature water tank 31 through the first water supply line 51.
[0112] In some embodiments, a first water supply valve 511 may be connected to the first water supply pipeline 51 to control the on / off state of the first water supply pipeline 51.
[0113] When the first water supply valve 511 is in the open state, the first water supply pipeline 51 is connected, and the water supply system can supply water to the low-temperature water tank 31; when the first water supply valve 511 is in the closed state, the first water supply pipeline 51 is disconnected, and the water supply system cannot supply water to the low-temperature water tank 31.
[0114] In some embodiments, the low-temperature water tank 31 has a water outlet. Water in the low-temperature water tank 31 can be supplied to the user through the water outlet.
[0115] The heat pump system includes a first outlet pipe 52. The first outlet pipe 52 is connected to the outlet of the low-temperature water tank 31. Water in the low-temperature water tank 31 can flow out through the first outlet pipe 52 for user use.
[0116] In some embodiments, a first shut-off valve 521 may be provided on the first water outlet pipe 52 to control the opening and closing of the first water outlet pipe 52.
[0117] When the first shut-off valve 521 is in the open state, the first water outlet pipe 52 is connected; when the first shut-off valve 521 is in the closed state, the first water outlet pipe 52 is disconnected.
[0118] In some embodiments, the high-temperature water tank 32 has a water inlet. An external water source can enter the high-temperature water tank 32 through the water inlet.
[0119] The heat pump system may include a second water supply line 53. The second water supply line 53 is connected to the inlet of the high-temperature water tank 32. An external water supply system supplies water to the high-temperature water tank 32 through the second water supply line 53.
[0120] In some embodiments, a second water supply valve 531 may be connected to the second water supply pipeline 53 to control the on / off state of the second water supply pipeline 53.
[0121] When the second water supply valve 531 is in the open state, the second water supply pipeline 53 is connected, and the water supply system can supply water to the high-temperature water tank 32; when the second water supply valve 531 is in the closed state, the second water supply pipeline 53 is disconnected, and the water supply system cannot supply water to the high-temperature water tank 32.
[0122] In some embodiments, the high-temperature water tank 32 has a water outlet. Water in the high-temperature water tank 32 can be supplied to the user through the water outlet.
[0123] The heat pump system includes a second outlet pipe 54. The second outlet pipe 54 is connected to the outlet of the high-temperature water tank 32. Water in the high-temperature water tank 32 can flow out through the second outlet pipe 54 for user use.
[0124] In some embodiments, a second shut-off valve 541 may be provided on the second water outlet pipe 54 to control the opening and closing of the second water outlet pipe 54.
[0125] When the second shut-off valve 541 is in the open state, the second water outlet pipe 54 is connected; when the second shut-off valve 541 is in the closed state, the second water outlet pipe 54 is disconnected.
[0126] In some embodiments, refer to Figure 6 The heat pump system may include a first bypass pipe 55. The inlet end of the first bypass pipe 55 is connected to a first outlet pipe 52, and the outlet end of the first bypass pipe 55 is connected to a second replenishment pipe 53. Water from the low-temperature water tank 31 can be replenished to the high-temperature water tank 32 through the first bypass pipe 55, so that the water in the high-temperature water tank 32 can be heated rapidly when the demand for high-temperature hot water is large.
[0127] Normally, the water supplied by the external water system is at room temperature, while the water in the low-temperature water tank 31 is at a low temperature of around 50°C. When the demand for high-temperature hot water is high, the water in the low-temperature water tank 31 is supplied to the high-temperature water tank 32 through the first bypass pipe 55. The water in the high-temperature water tank 32 heats up from 50°C to 70°C-85°C much faster than the water in the low-temperature water tank, which can meet the user's urgent needs in a timely manner and reduce the system's energy consumption.
[0128] In some embodiments, a first bypass valve 551 is connected to the first bypass line 55 for controlling the opening and closing of the first bypass line 55.
[0129] When the first bypass valve 551 is in the open state, the first bypass pipe 55 is connected, and the low-temperature water tank 31 can supply water to the high-temperature water tank 32 through the first bypass pipe 55. When the first bypass valve 551 is in the closed state, the first bypass pipe 55 is disconnected, and there is no connection between the low-temperature water tank 31 and the high-temperature water tank 32.
[0130] In some embodiments, a second water pump 522 may be connected to the first water outlet pipe 52 for pumping water from the low-temperature water tank 31 to the outside.
[0131] The second water pump 522 is connected between the outlet of the low-temperature water tank 31 and the inlet of the first bypass pipe 55. The inlet of the first bypass pipe 55 can be located on the outlet side of the second water pump 522.
[0132] The outlet end of the first bypass pipe 55 is located on the outlet side of the second water supply valve 53 on the second water supply pipe 53.
[0133] When the second water pump 522 is running, the first bypass valve 551 is opened. Figure 6 The middle arrow indicates the direction of water flow. The water in the low-temperature water tank 31 flows to the high-temperature water tank 32 via the second water pump 522 and the first bypass pipe 55.
[0134] In some embodiments, refer to Figure 7 and Figure 8The heat pump system may include a second bypass pipe 56. The inlet end of the second bypass pipe 56 is connected to the second outlet pipe 54, and the outlet end of the second bypass pipe 56 is connected to the first water supply pipe 51. Water from the high-temperature water tank 32 can be supplied to the low-temperature water tank 31 through the second bypass pipe 56, so that the water temperature in the low-temperature water tank 31 can be quickly met when the demand for low-temperature hot water is large.
[0135] Reference Figure 7 , Figure 7 The middle arrow indicates the direction of water flow. When the demand for low-temperature hot water is large and the water temperature of the high-temperature water tank 32 is not too high, for example, not greater than 50°C, the high-temperature water tank 32 can directly supply water to the low-temperature water tank 31 through the second bypass pipe 56.
[0136] Reference Figure 8 , Figure 8 The middle arrow indicates the direction of water flow. When the demand for low-temperature hot water is large and the water temperature in the high-temperature water tank 32 is high, for example, greater than 50°C, the external water supply system and the high-temperature water tank 32 simultaneously replenish water to the low-temperature water tank 31.
[0137] In this application, water is replenished from the high-temperature water tank 32 to the low-temperature water tank 31, which can quickly meet the user's urgent need for low-temperature hot water.
[0138] In some embodiments, a second bypass valve 561 is connected to the second bypass line 56 for controlling the opening and closing of the second bypass line 56.
[0139] When the second bypass valve 561 is in the open state, the second bypass pipe 56 is connected, and the high-temperature water tank 32 can supply water to the low-temperature water tank 31 through the second bypass pipe 56. When the second bypass valve 561 is in the closed state, the second bypass pipe 56 is disconnected, and there is no connection between the low-temperature water tank 31 and the high-temperature water tank 32.
[0140] In some embodiments, a third water pump 542 may be connected to the second water outlet pipe 54 for pumping water from the high-temperature water tank 32 outward.
[0141] The third water pump 542 can be connected between the outlet of the high-temperature water tank 32 and the inlet of the second bypass pipe 56. The inlet of the second bypass pipe 56 can be located on the outlet side of the third water pump 542.
[0142] The outlet end of the second bypass pipe 56 is located on the outlet side of the first water supply valve 511 on the first water supply pipe 51.
[0143] When the third water pump 542 is running and the second bypass valve 561 is open, the water in the high-temperature water tank 32 flows through the third water pump 542 and along the second bypass pipeline 56 to the low-temperature water tank 31.
[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
[0145] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.
Claims
1. A heat pump system, characterized by, Comprise: A first refrigerant circulation system, a second refrigerant circulation system and a hot water system; In the first refrigerant circulation system, a first compressor, a first heat exchange passage, a first expansion valve and a first heat exchanger are connected in series by refrigerant pipelines to form a circuit; the first heat exchange passage is connected in parallel with a third heat exchange passage; a branch circuit in which the third heat exchange passage is located is connected in series with a first electromagnetic valve; In the second refrigerant circulation system, a second compressor, a fifth heat exchange passage, a second expansion valve and a fourth heat exchange passage are connected in series by refrigerant pipelines to form a circuit; In the hot water system, the second heat exchange passage and the sixth heat exchange passage are connected in series by water pipelines to form a heat supply circuit, and a low-temperature water tank and a high-temperature water tank are connected in parallel and then connected in series with the heat supply circuit to form a circuit; Wherein, the first heat exchange passage and the second heat exchange passage constitute a first heat exchange module, and the refrigerant in the first heat exchange passage exchanges heat with the water in the second heat exchange passage; The third heat exchange passage and the fourth heat exchange passage constitute a second heat exchange module, and the refrigerant in the third heat exchange passage exchanges heat with the refrigerant in the fourth heat exchange passage; The fifth heat exchange passage and the sixth heat exchange passage constitute a third heat exchange module, and the refrigerant in the fifth heat exchange passage exchanges heat with the water in the sixth heat exchange passage; When low-temperature hot water is prepared, the first refrigerant circulation system operates, and the first electromagnetic valve is disconnected; When high-temperature hot water is prepared, the first refrigerant circulation system and the second refrigerant circulation system both operate, and the first electromagnetic valve is connected.
2. The heat pump system of claim 1, wherein, In the hot water system, the water inlet side and the water outlet side of the branch circuit in which the low-temperature water tank is located are connected in series with a third electromagnetic valve and a fourth electromagnetic valve respectively; The water inlet side and the water outlet side of the branch circuit in which the high-temperature water tank is located are connected in series with a fifth electromagnetic valve and a sixth electromagnetic valve respectively; When the low-temperature water tank is used to prepare low-temperature hot water, the third electromagnetic valve and the fourth electromagnetic valve are in a conductive state, and the fifth electromagnetic valve and the sixth electromagnetic valve are in a disconnected state; When the high-temperature water tank is used to prepare high-temperature hot water or low-temperature hot water, the third electromagnetic valve and the fourth electromagnetic valve are in a disconnected state, and the fifth electromagnetic valve and the sixth electromagnetic valve are in a conductive state.
3. The heat pump system of claim 1, wherein, A first water pump is connected to the heat supply circuit, and the first water pump causes water to flow from the second heat exchange passage to the sixth heat exchange passage.
4. The heat pump system of claim 1, wherein, Further comprise: A first water supplement pipeline connected to the water inlet of the low-temperature water tank; A first water outlet pipeline connected to the water outlet of the low-temperature water tank; A second water supplement pipeline connected to the water inlet of the high-temperature water tank; A second water outlet pipeline connected to the water outlet of the high-temperature water tank; A first bypass pipeline, the water inlet end of which is connected to the first water outlet pipeline, and the water outlet end of which is connected to the second water supplement pipeline; A first bypass valve connected to the first bypass pipeline, used to make the first bypass pipeline connected or disconnected; When the first bypass valve is in a conductive state, the water in the low-temperature water tank supplements the high-temperature water tank through the first bypass pipeline.
5. The heat pump system of claim 4, wherein, Further comprise: A second bypass pipeline, the water inlet end of which is connected to the second water outlet pipeline, and the water outlet end of which is connected to the first water supplement pipeline; A second bypass valve connected to the second bypass pipeline, used to make the second bypass pipeline connected or disconnected; When the second bypass valve is in the on state, the water of the high-temperature water tank is supplied to the low-temperature water tank through the second bypass pipeline.
6. The heat pump system of claim 5, wherein, Further comprising: A second water pump is connected to the first water outlet pipeline and located between the water outlet of the low-temperature water tank and the water inlet end of the first bypass pipeline. A third water pump is connected to the second water outlet pipeline and located between the water outlet of the high-temperature water tank and the water inlet end of the second bypass pipeline.
7. The heat pump system of claim 1, wherein, The first heat exchange module, the second heat exchange module and the third heat exchange module are integrated on a plate heat exchanger.
8. The heat pump system of claim 7, wherein, The first compressor, the first expansion valve and the first heat exchanger are located in an outdoor unit; the second compressor, the second expansion valve and the plate heat exchanger are located in an indoor unit.
9. The heat pump system of claim 1, wherein, Different refrigerants flow in the first refrigerant circulation system and the second refrigerant circulation system.
10. A heat pump system, characterized by, Comprising: A first refrigerant circulation system, a second refrigerant circulation system and a hot water system; In the first refrigerant circulation system, a first compressor, a first heat exchange channel, a first expansion valve and a first heat exchanger are connected in series through a refrigerant pipeline to form a loop; the first heat exchange channel is connected in parallel with a third heat exchange channel; a branch of the third heat exchange channel is connected in series with a first electromagnetic valve; In the second refrigerant circulation system, a second compressor, a fifth heat exchange channel, a second expansion valve and a fourth heat exchange channel are connected in series through a refrigerant pipeline to form a loop; In the hot water system, a second heat exchange channel and a sixth heat exchange channel are connected in series through a water pipeline to form a heat supply flow path, and a low-temperature water tank and a high-temperature water tank are connected in series with the heat supply flow path to form a loop; The refrigerant in the first heat exchange channel exchanges heat with the water in the second heat exchange channel; The refrigerant in the third heat exchange channel exchanges heat with the refrigerant in the fourth heat exchange channel; The refrigerant in the fifth heat exchange channel exchanges heat with the water in the sixth heat exchange channel; When low-temperature hot water is prepared, the first refrigerant circulation system operates and the first electromagnetic valve is disconnected; When high-temperature hot water is prepared, the first refrigerant circulation system and the second refrigerant circulation system both operate and the first electromagnetic valve is connected.