Dual heat supply pump system
By designing a dual-heat pump system, and utilizing a multi-stage heat exchanger and CO2 refrigerant in the hot water tank, the low heat exchange efficiency and scale problems of air conditioning heat pump systems are solved, achieving efficient domestic hot water supply and heating effect.
Patent Information
- Application Number
- CN202520348109.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Existing air conditioning heat pump systems have low heat exchange efficiency and are prone to scale buildup, which affects the energy efficiency of the air conditioner.
A dual-heat pump system is adopted, including a compressor, a heat exchange tank, a throttling device, and an evaporator. First and second heat exchangers are set up, and CO2 is used as the refrigerant. The multi-stage heat exchanger in the heat exchange tank avoids scale formation and improves the subcooling of the refrigerant.
It improves the heating efficiency of the heat pump system, ensures domestic hot water and heating temperature, avoids scale blockage, and enhances the user experience.
Smart Images
Figure CN223925149U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to air conditioning technical field, concretely relates to a two combined heat pump system. BACKGROUND
[0002] Air conditioning heat pump system is a kind of system using heat pump technology to realize indoor cooling and heating supply, can provide better living environment and working environment for user in different seasons, and with the development and progress of technology, some air conditioning heat pump system can also be used to provide domestic hot water and heat supply to floor heating pipeline.
[0003] But in prior art, mainly through refrigerant-water heat exchanger or water-water heat exchanger to realize heat exchange, but the heat exchange efficiency of this kind of heat exchange mode is lower, influence air conditioning energy efficiency, and easy to produce incrustation, thereby influence system operation, and it can further affect heat exchange, lead to air conditioning energy efficiency reduction.
[0004] Correspondingly, the prior art needs a new technical scheme to solve the above problems. UTILITY MODEL CONTENT
[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problem of low heat exchange efficiency and influence air conditioning energy efficiency of the existing air conditioning heat pump system, the application provides a two combined heat pump system, comprising:
[0006] Compressor (1);
[0007] Heat exchange water tank (2), the heat exchange water tank (2) is provided with water inlet (21) and water outlet (22), and the heat exchange water tank (2) is provided with first heat exchanger (3) and second heat exchanger (4), the inlet (311) of first heat exchanger (3) is communicated with the exhaust port of compressor (1), and the two ends of second heat exchanger (4) are used to communicate with heating pipeline (5);
[0008] Throttling device (6), the inlet of throttling device (6) is communicated with the outlet (312) of first heat exchanger (3);
[0009] Evaporator (7), the inlet of evaporator (7) is communicated with the outlet of throttling device (6), and the outlet of evaporator (7) is communicated with the suction port of compressor (1).
[0010] In the technical scheme, the heat pump system can supply domestic hot water and realize heating at the same time, the heat loss caused by multi-stage heat exchange is reduced by arranging the heat exchange water tank (2), and compared with the arrangement of the prior art which realizes heat exchange through the refrigerant-water heat exchanger or the water-water heat exchanger, the arrangement of the first heat exchanger (3) and the second heat exchanger (4) on the heat exchange water tank (2) can avoid the problem that the heat exchanger is blocked and the heating energy efficiency of the air conditioner is affected due to the scale.
[0011] In the preferred technical scheme of the two-supply heat pump system, the two-supply heat pump system further comprises a four-way valve (8), and a first interface (a), a second interface (b), a third interface (c) and a fourth interface (d) of the four-way valve (8) are in communication with an exhaust port of the compressor (1), an outlet of the evaporator (7), a suction port of the compressor (1) and an inlet (311) of the first heat exchanger (3) respectively.
[0012] In the preferred technical scheme of the two-supply heat pump system, the inlet (311) of the first heat exchanger (3) and the water outlet (22) are both located above the heat exchange water tank (2), and the outlet (312) of the first heat exchanger (3) and the water inlet (21) are both located below the heat exchange water tank (2).
[0013] In the preferred technical scheme of the two-supply heat pump system, the inlet of the second heat exchanger (4) is located below the heat exchange water tank (2), and the outlet of the second heat exchanger (4) is located above the heat exchange water tank (2).
[0014] In the preferred technical scheme of the two-supply heat pump system, the inlet (311) of the first heat exchanger (3) and the water outlet (22) are both located above the heat exchange water tank (2), and the outlet (312) of the first heat exchanger (3) and the water inlet (21) are both located below the heat exchange water tank (2).
[0015] In the preferred technical scheme of the two-supply heat pump system, the first heat exchanger (3) is arranged outside the heat exchange water tank (2), the first heat exchanger (3) comprises two vertically arranged first pipelines (31) and a plurality of horizontally arranged second pipelines (32), two ends of each of the plurality of second pipelines (32) are in communication with the first pipelines (31), and the second pipelines (32) are adapted to the outside of the heat exchange water tank (2).
[0016] The inlet (311) of the first heat exchanger (3) is arranged at one end of one of the first pipelines (31), the outlet (312) of the first heat exchanger (3) is arranged at the other end of any one of the first pipelines (31), and a plurality of baffles are arranged in the two first pipelines (31), and the plurality of baffles are arranged to enable the refrigerant to flow through the plurality of second pipelines (32) in an S shape; or
[0017] The first heat exchanger (3) is arranged on the outside or inside of the heat exchange water tank (2), the first heat exchanger (3) is arranged as a coil heat exchanger, and the first heat exchanger (3) is arranged in a spiral shape.
[0018] In the preferred technical solution of the two-supply heat pump system, the second heat exchanger (4) is arranged on the inside of the heat exchange water tank (2).
[0019] In the preferred technical solution of the two-supply heat pump system, the second heat exchanger (4) is arranged as a coil heat exchanger, and the second heat exchanger (4) is arranged in a spiral shape.
[0020] In the preferred technical solution of the two-supply heat pump system, the two-supply heat pump system further comprises an expansion water tank (9) and a water pump (10), the second heat exchanger (4), the heating pipeline (5), the expansion water tank (9) and the water pump (10) are communicated with each other and form a loop.
[0021] In the preferred technical solution of the two-supply heat pump system, the heat exchange water tank (2) is provided with a scale inhibition assembly.
[0022] In the preferred technical solution of the two-supply heat pump system, the two-supply heat pump system adopts CO2 as the refrigerant.
[0023] In the case of adopting the above technical solution, CO2 as the refrigerant does not harm the environment, and its heating performance is outstanding. BRIEF DESCRIPTION OF DRAWINGS
[0024] The two-supply heat pump system of the present application will be described below with reference to the accompanying drawings. In the drawings:
[0025] Figure 1 is a schematic view of the two-supply heat pump system of the present application;
[0026] Figure 2 is a schematic view of the first heat exchanger of one embodiment of the present application.
[0027] LIST OF REFERENCE NUMERALS
[0028] 1, compressor; 2, heat exchange water tank; 21, water inlet; 22, water outlet; 3, first heat exchanger; 31, first pipeline; 311, inlet; 312, outlet; 32, second pipeline; 4, second heat exchanger; 5, heating pipeline; 6, throttling device; 7, evaporator; 8, four-way valve; a, first interface; b, second interface; c, third interface; d, fourth interface; 9, expansion water tank; 10, water pump. DETAILED DESCRIPTION
[0029] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art will understand that the embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. For example, although the heating pipeline (5) is introduced in combination with the floor heating coil in the present embodiment, this is not intended to limit the protection scope of the present application, and those skilled in the art can apply the present application to other application scenarios without deviating from the principles of the present application. For example, the heating pipeline (5) is arranged as a radiator.
[0030] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship of "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", "fourth" are only for the purpose of description and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, "a plurality of" means at least two.
[0031] In addition, it should be further noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.
[0032] As described in the background, the air conditioning heat pump system is a system that uses heat pump technology to achieve indoor cooling and heating supply, which can provide better living and working environment for users in different seasons, and with the development and progress of technology, some air conditioning heat pump systems can also be used to provide domestic hot water and heat supply for floor heating pipelines.
[0033] However, in the prior art, heat exchange is mainly achieved by refrigerant-water heat exchanger or water-water heat exchanger, but the heat exchange efficiency of this kind of heat exchange mode is low, which affects the air conditioning energy efficiency, and is easy to produce scale, thereby affecting the system operation, and further affecting the heat exchange, resulting in the decrease of air conditioning energy efficiency.
[0034] In order to solve the problems of low heat exchange efficiency and influence on air conditioning energy efficiency existing in the existing air conditioning heat pump system, the application provides a two combined heat pump system, which comprises a compressor (1), a heat exchange water tank (2), a throttling device (6) and an evaporator (7), the heat exchange water tank (2) is provided with a water inlet (21) and a water outlet (22), and the heat exchange water tank (2) is provided with a first heat exchanger (3) and a second heat exchanger (4), the inlet (311) of the first heat exchanger (3) is communicated with the exhaust port of the compressor (1), and the two ends of the second heat exchanger (4) are used for being communicated with a heating pipeline (5). The inlet of the throttling device (6) is communicated with the outlet (312) of the first heat exchanger (3), the inlet of the evaporator (7) is communicated with the outlet of the throttling device (6), and the outlet of the evaporator (7) is communicated with the suction port of the compressor (1).
[0035] In the case of adopting the above technical scheme, the heat pump system can supply domestic hot water, and can also realize heating while preparing hot water by the heat pump system. The arrangement of the heat exchange water tank (2) can reduce the heat loss caused by multi-stage heat exchange, and compared with the arrangement of realizing heat exchange by the refrigerant-water heat exchanger or the water-water heat exchanger in the prior art, the arrangement of the first heat exchanger (3) and the second heat exchanger (4) on the heat exchange water tank (2) can avoid the problem of heat exchanger blockage and influence on air conditioning heating energy efficiency caused by scale.
[0036] Hereinafter, the two combined heat pump system of the application will be described with reference to Figure 1 and Figure 2 , wherein, Figure 1 is a schematic view of the two combined heat pump system of the application; Figure 2 is a schematic view of the first heat exchanger of one embodiment of the application.
[0037] As shown in Figure 1 and Figure 2 , in a preferred embodiment, the two combined heat pump system comprises a compressor (1), a four-way valve (8), a heat exchange water tank (2), a throttling device (6) and an evaporator (7), the heat exchange water tank (2) is provided with a water inlet (21) and a water outlet (22), and the heat exchange water tank (2) is provided with a first heat exchanger (3) and a second heat exchanger (4), the first heat exchanger (3) is used for connecting refrigerant, the second heat exchanger (4), an expansion tank (9), a heating pipeline (5) and a water pump (10) are communicated in sequence and constitute a loop.
[0038] The first interface (a), the second interface (b), the third interface (c) and the fourth interface (d) of the four-way valve (8) are respectively communicated with the exhaust port of the compressor (1), the outlet of the evaporator (7), the suction port of the compressor (1) and the inlet (311) of the first heat exchanger (3). The inlet of the throttling device (6) is communicated with the outlet (312) of the first heat exchanger (3), the inlet of the evaporator (7) is communicated with the outlet of the throttling device (6), and the refrigerant used by the two combined heat pump systems is CO2.
[0039] In the embodiment, the first heat exchanger (3) is arranged outside the heat exchange water tank (2), the first heat exchanger (3) comprises two vertically arranged first pipes (31) and a plurality of horizontally arranged second pipes (32), two ends of the plurality of second pipes (32) are respectively communicated with the first pipes (31), and the second pipes (32) are matched with the outside of the heat exchange water tank (2). The inlet (311) and the outlet (312) of the first heat exchanger (3) are respectively arranged at two ends of one of the first pipes (31), and a plurality of baffles (not shown in the figure) are arranged in the two first pipes (31), and the plurality of baffles can make the refrigerant flow through the plurality of second pipes (32) in an S shape. The second heat exchanger (4) is arranged inside the heat exchange water tank (2), the second heat exchanger (4) is arranged as a coil heat exchanger, and the second heat exchanger (4) is arranged in a spiral shape. Among them, the inlet (311) of the first heat exchanger (3), the water outlet (22) and the outlet of the second heat exchanger (4) are all located above the heat exchange water tank (2), and the outlet (312) of the first heat exchanger (3), the water inlet (21) and the inlet of the second heat exchanger (4) are all located below the heat exchange water tank (2).
[0040] Referring back to Figure 1 When heating water and heating, the compressor (1) compresses the refrigerant into high-temperature and high-pressure refrigerant gas. The high-temperature and high-pressure refrigerant gas first enters the first heat exchanger (3) through the first interface (a) and the fourth interface (d) of the four-way valve (8). At this time, cold water enters the heat exchange water tank (2) through the water inlet (21), and the refrigerant can exchange heat with the water in the heat exchange water tank (2) when flowing through the first heat exchanger (3). The heated hot water flows out from the water outlet (22) and realizes the supply of domestic hot water. Then the refrigerant flowing out from the first heat exchanger (3) becomes low-temperature and low-pressure refrigerant liquid after being throttled and decompressed by the throttling device (6). The low-temperature and low-pressure refrigerant liquid enters the evaporator (7) to absorb heat and becomes low-temperature and low-pressure refrigerant gas. Then the refrigerant gas returns to the compressor (1) through the second interface (b) and the third interface (c) of the four-way valve (8). Of course, when only hot water is needed, the water pump (10) is in the closed state, and when heating is needed, the water pump (10) is in the open state. At this time, the water in the heating pipeline (5) exchanges heat with the water in the heat exchange water tank (2) through the second heat exchanger (4) inside the heat exchange water tank (2).
[0041] During defrosting, the compressor (1) compresses the refrigerant into a high-temperature and high-pressure refrigerant gas. The high-temperature and high-pressure refrigerant gas enters the evaporator (7) after passing through the first port (a) and the second port (b) of the four-way valve (8). At this time, the refrigerant releases heat to melt the frost condensed on the surface of the evaporator (7). Then, the refrigerant enters the first heat exchanger (3) to absorb heat after being throttled and depressurized by the throttling device (6). Then, the refrigerant returns to the compressor (1) through the fourth port (d) and the third port (c) of the four-way valve (8).
[0042] See below. Figure 2 ,by Figure 2 Taking the direction shown as an example, when the high-temperature and high-pressure refrigerant gas enters the first heat exchanger (3), it first enters the first pipe (31) on the right side through the inlet (311). For example, a baffle can be set at the connection between the first pipe (31) on the right side and the fourth second pipe (32) from the top. The baffle can cut off the first pipe (31) on the right side at this point. After the refrigerant enters the first pipe (31), it is blocked by the baffle at this point. Then the refrigerant flows from the first to the fourth second pipe (32) to the first pipe (31) on the left side. At this time, a baffle is set at the connection between the first pipe (31) on the left side and the eighth second pipe (32) from the top, so that the refrigerant can flow from the fifth to the eighth second pipe (32) to the first pipe (31) on the right side. This cycle repeats, allowing the refrigerant to flow along multiple second pipes (32) in an S-shape, ensuring sufficient heat exchange between the refrigerant and the water in the heat exchange tank (2). At this time, the temperature of the refrigerant flowing out from the outlet (312) is relatively low. In other words, the setting of the first heat exchanger (3) increases the subcooling of the refrigerant, thereby improving the heating efficiency. Of course, the positions of the inlet (311) and outlet (312) are not fixed. They are determined by the position of the baffle and the number of second pipes (32). Therefore, the outlet (312) may also be located at the bottom of the first pipe (31) on the left.
[0043] It needs to be explained that in the prior art, when producing hot water, a refrigerant-water heat exchanger is usually used to heat the cold water. When heating, a refrigerant-water heat exchanger can be used to heat the water in the heating pipe (5), or a water-to-water heat exchanger can be used after hot water is obtained. This heat exchange method will cause scale to form on the water side of the heat exchanger. After long-term use, the scale may cause problems such as heat exchanger blockage, reduced heat exchange efficiency, and reduced heating efficiency. Of course, soft water can be used in the water system or a special descaling device can be installed to avoid scale formation, but this will increase costs. In this embodiment, soft water can be used only in the heating pipe (5), and a scale inhibition component can be installed in the hot water tank (2). For example, the hot water tank (2) can be scale-inhibited by an enamel inner liner and a magnesium / zinc rod, which helps to reduce costs.
[0044] In addition, in the prior art, when heat exchange is achieved by a refrigerant-water heat exchanger or a water-water heat exchanger, heat loss occurs in the water during transmission, but in the embodiment, the first heat exchanger (3) and the second heat exchanger (4) are directly in heat exchange with the water in the heat exchange water tank (2), avoiding the reduction of heating energy efficiency caused by multi-stage heat exchange. Moreover, in the prior art, if the refrigerant-water heat exchanger is used to heat the water in the heating pipeline (5), the temperature in the heating pipeline (5) will be too high, which may cause damage to the floor in some special cases, for example, when the heating pipeline (5) is set as a floor heating coil. Moreover, the temperature difference between the outlet temperature and the inlet temperature of the heating pipeline (5) is usually small, and incomplete refrigerant heat exchange will also lead to a reduction in heating energy efficiency.
[0045] In the embodiment, the heating performance of CO2 as refrigerant is good, and experiments have shown that, under normal circumstances, the water temperature in the heat exchange water tank (2) can reach 60-70℃ through the heat exchange water tank (2), and continuous supply of large-flow hot water can be achieved, and the water temperature in the heating pipeline (5) can reach 30-40℃ through the second heat exchanger (4). Therefore, the setting of the heat exchange water tank (2) can meet the demand for the supply temperature of domestic hot water and the heating temperature at the same time. Moreover, during defrosting, the refrigerant absorbs the heat of the water in the heat exchange water tank (2) through the first heat exchanger (3), and since the water in the heat exchange water tank (2) is large in quantity and stores a large amount of heat, it will not have a great impact on the water temperature in the heat exchange water tank (2). Therefore, the setting of the heat exchange water tank (2) can also avoid reducing the hot water supply temperature, thereby ensuring the user's experience.
[0046] The person skilled in the art can understand that, in the present embodiment, the inlet (311) of the first heat exchanger (3) and the water outlet (22) are both arranged above the heat exchange water tank (2), and the outlet (312) of the first heat exchanger (3) and the water inlet (21) are both arranged below the heat exchange water tank (2), which can improve the supercooling degree of the refrigerant, and at this time, the water temperature above the heat exchange water tank (2) is higher, and the water temperature below the heat exchange water tank (2) is lower, so as to improve the hot water supply temperature. Similarly, when the inlet and the outlet of the second heat exchanger (4) are arranged below and above the heat exchange water tank (2) respectively, the heating temperature can also be improved as much as possible. However, the arrangement is not necessarily required, and the person skilled in the art can change the specific arrangement according to the needs, for example, the second heat exchanger (4) is arranged horizontally, and at this time, the inlet and the outlet of the second heat exchanger (4) are located at the same height of the heat exchange water tank (2). For example, the inlet (311) of the first heat exchanger (3), the water outlet (22) and the outlet of the second heat exchanger (4) are all arranged below the heat exchange water tank (2), and the outlet (312) of the first heat exchanger (3), the water inlet (21) and the inlet of the second heat exchanger (4) are all arranged above the heat exchange water tank (2), which can also ensure the hot water supply temperature and the heating temperature. In addition, the arrangement of the first heat exchanger (3) is not necessarily fixed, and in an alternative embodiment, the first heat exchanger (3) can be arranged as a coil heat exchanger, at this time, the first heat exchanger (3) is arranged in a spiral shape, and at this time, the first heat exchanger (3) can be arranged outside or inside the heat exchange water tank (2).
[0047] The person skilled in the art can also understand that, although the heat exchange water tank (2) is descaled by the enamel liner and the magnesium rod / zinc rod in the present embodiment, the arrangement is not necessarily required, and the person skilled in the art can change the descaling or scaling method of the heat exchange water tank (2) according to the needs. In addition, in the present embodiment, the CO2 refrigerant can ensure the continuous supply of a large amount of domestic hot water and the heating effect, but the arrangement is not necessarily required, and the person skilled in the art can select the refrigerant according to the needs, but in the case of considering the heating energy efficiency and user experience, the CO2 refrigerant is a relatively optimal choice.
[0048] The person skilled in the art can understand that, although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.
[0049] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will all fall within the protection scope of the present application.
Claims
1. A two-in-one heat pump system, characterized by, Comprise: A compressor (1); A heat exchange water tank (2), which is provided with a water inlet (21) and a water outlet (22), and is provided with a first heat exchanger (3) and a second heat exchanger (4), the inlet (311) of the first heat exchanger (3) is communicated with the exhaust port of the compressor (1), and the two ends of the second heat exchanger (4) are used to communicate with the heating pipeline (5); A throttling device (6), the inlet of the throttling device (6) is communicated with the outlet (312) of the first heat exchanger (3); An evaporator (7), the inlet of the evaporator (7) is communicated with the outlet of the throttling device (6), and the outlet of the evaporator (7) is communicated with the suction port of the compressor (1).
2. The two-in-one heat pump system of claim 1, wherein, The two combined heat pump systems further comprise a four-way valve (8), the first interface (a), the second interface (b), the third interface (c) and the fourth interface (d) of the four-way valve (8) are respectively communicated with the exhaust port of the compressor (1), the outlet of the evaporator (7), the suction port of the compressor (1) and the inlet (311) of the first heat exchanger (3).
3. The two-in-one heat pump system of claim 1, wherein, The inlet (311) of the first heat exchanger (3) and the water outlet (22) are both located above the heat exchange water tank (2), and the outlet (312) of the first heat exchanger (3) and the water inlet (21) are both located below the heat exchange water tank (2).
4. The two-in-one heat pump system of claim 3, wherein, The inlet of the second heat exchanger (4) is located below the heat exchange water tank (2), and the outlet of the second heat exchanger (4) is located above the heat exchange water tank (2).
5. The two-in-one heat pump system of claim 1, wherein, The first heat exchanger (3) is arranged outside the heat exchange water tank (2), the first heat exchanger (3) comprises two vertically arranged first pipelines (31) and a plurality of horizontally arranged second pipelines (32), the two ends of the plurality of second pipelines (32) are respectively communicated with the first pipelines (31), and the second pipelines (32) are matched with the outside of the heat exchange water tank (2); The inlet (311) of the first heat exchanger (3) is arranged at one end of one of the first pipelines (31), the outlet (312) of the first heat exchanger (3) is arranged at the other end of any one of the first pipelines (31), and a plurality of baffles are arranged in the two first pipelines (31), the plurality of baffles are arranged to enable the refrigerant to flow through the plurality of second pipelines (32) in an S shape; or The first heat exchanger (3) is arranged outside or inside the heat exchange water tank (2), the first heat exchanger (3) is arranged as a coil heat exchanger, and the first heat exchanger (3) is arranged in a spiral shape.
6. The two-in-one heat pump system of claim 1, wherein, The second heat exchanger (4) is arranged inside the heat exchange water tank (2).
7. The two-in-one heat pump system of claim 6, wherein, The second heat exchanger (4) is arranged as a coil heat exchanger, and the second heat exchanger (4) is arranged in a spiral shape.
8. The two-in-one heat pump system of claim 1, wherein, The two combined heat pump systems further comprise an expansion water tank (9) and a water pump (10), the second heat exchanger (4), the heating pipeline (5), the expansion water tank (9) and the water pump (10) are communicated with each other and form a loop.
9. The two-in-one heat pump system of claim 1, wherein, A scale inhibition assembly is arranged in the heat exchange water tank (2).
10. The two-in-one heat pump system of claim 1, wherein, The two combined heat pump system uses CO2 as refrigerant.