A dual-stage coupled air-cooled and water-cooled heat pump system

Abstract

This utility model discloses a dual-stage coupled air-cooled and water-cooled heat exchange heat pump system, belonging to the technical field of heat pump systems. It includes a compressor, a four-way valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a heat supply unit. In cooling mode, the output end of the compressor is connected to the first end of the four-way valve, and the second end of the four-way valve is sequentially connected to the first, third, and second heat exchangers. The first and third heat exchangers both function as condensers. The heat supply unit provides cooling to the third heat exchanger. The second heat exchanger functions as an evaporator. The third end of the four-way valve is connected to the output end of the second heat exchanger, and the fourth end of the four-way valve is connected to the input end of the compressor. In heating mode, the output end of the compressor is connected to the first end of the four-way valve, and the third end of the four-way valve is sequentially connected to the second, third, and first heat exchangers. The second heat exchanger functions as a condenser, and the first heat exchanger functions as an evaporator, reducing dependence on air temperature.

Description

Technical Field

[0001] This utility model relates to the field of heat pump system technology, and in particular to a two-stage coupled air-cooled and water-cooled heat exchange heat pump system. Background Technology

[0002] Hospitals, office buildings, libraries, hotels, laboratories, public transportation buildings, cleanrooms and other industrial and civil buildings commonly use air-cooled direct expansion heat pump systems for dehumidification, because the low evaporation temperature of the direct expansion heat pump system provides a stable and reliable dehumidification cold source for the air conditioning system.

[0003] In related technologies, conventional air-cooled direct expansion heat pump systems are highly dependent on air temperature. In the extreme high temperatures of summer, the operating efficiency of the cooling mode of the air-cooled direct expansion heat pump system is low, while in the cold low temperatures of winter, the heating mode of the air-cooled direct expansion heat pump system may fail to establish a pressure ratio due to excessive refrigerant subcooling. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a dual-stage coupled air-cooled and water-cooled heat exchange heat pump system, which helps to reduce dependence on air temperature and ensures the normal operation of both cooling and heating modes.

[0005] The air-cooled and water-cooled dual-stage coupled heat exchange heat pump system of this utility model includes: a compressor, a four-way valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a heat supply unit. The first heat exchanger is located outdoors, the second heat exchanger is located indoors, and the heat supply unit is configured to provide cooling or heating to the third heat exchanger.

[0006] In the cooling mode of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system, the output end of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to the first heat exchanger, the third heat exchanger and the second heat exchanger in sequence, the first heat exchanger and the third heat exchanger both serve as condensers, the heat supply unit is used to provide cooling capacity to the third heat exchanger, the second heat exchanger serves as an evaporator, the third end of the four-way valve is connected to the output end of the second heat exchanger, and the fourth end of the four-way valve is connected to the input end of the compressor.

[0007] Under the heating mode of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system, the output end of the compressor is connected to the first end of the four-way valve, the third end of the four-way valve is connected to the second heat exchanger, the third heat exchanger and the first heat exchanger in sequence, the second heat exchanger acts as a condenser, the heat supply unit is used to provide heat to the third heat exchanger, the first heat exchanger acts as an evaporator, the second end of the four-way valve is connected to the output end of the first heat exchanger, and the fourth end of the four-way valve is connected to the input end of the compressor.

[0008] The air-cooled and water-cooled dual-stage coupled heat exchange heat pump system according to the embodiments of this utility model has at least the following beneficial effects: The air-cooled and water-cooled dual-stage coupled heat exchange heat pump system is equipped with a third heat exchanger and a heating / cooling supply unit. With the switching of the four-way valve, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system can switch between cooling and heating modes. When operating in cooling mode, the output end of the compressor is connected to the first end of the four-way valve, while the second end of the four-way valve is connected to the first heat exchanger and the third... The heat exchangers are connected sequentially, meaning the refrigerant, after being compressed by the compressor, passes through the first, third, and second heat exchangers in sequence. A cooling / heating supply unit provides cooling to the third heat exchanger. Both the first and third heat exchangers function as condensers, improving the efficiency and effectiveness of refrigerant condensation. The second heat exchanger acts as an evaporator to cool the room. The evaporated refrigerant flows sequentially through the third and fourth terminals of a four-way valve before entering the compressor's input terminal, thus achieving refrigerant circulation and enabling cooling even in extreme summer conditions. To improve the operating efficiency of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system in cooling mode under high temperatures, the system operates in heating mode. The compressor output is connected to the first end of a four-way valve, and the third end of the four-way valve is sequentially connected to the second, third, and first heat exchangers. This means the refrigerant, after being compressed by the compressor, passes through these heat exchangers sequentially. The second heat exchanger acts as a condenser to provide heating to the room. The heating / cooling supply unit is used to... The third heat exchanger provides heat, while the first heat exchanger functions as an evaporator. The evaporated refrigerant flows sequentially through the second and fourth ends of the four-way valve before entering the compressor's input end to achieve refrigerant circulation. This means that the heat supply unit can supplement heat for the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system in winter, thereby preventing the problem of excessive refrigerant supercooling leading to an inability to establish a pressure ratio. This air-cooled and water-cooled dual-stage coupled heat exchange heat pump system can effectively reduce its dependence on ambient air temperature, ensuring the normal operation of both cooling and heating modes.

[0009] According to some embodiments of the present invention, the third heat exchanger has a first heat exchange channel and a second heat exchange channel. The two ends of the first heat exchange channel are respectively connected to the first heat exchanger and the second heat exchanger, and the two ends of the second heat exchange channel are respectively connected to the inlet end and the outlet end of the hot and cold supply.

[0010] According to some embodiments of this utility model, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system further includes a fourth heat exchanger, a three-way valve, and a first one-way valve. The inlet end of the three-way valve is connected to the output end of the compressor, and the first outlet end of the three-way valve is sequentially connected to the fourth heat exchanger and the first one-way valve. The output end of the first one-way valve and the second outlet end of the three-way valve are both connected to the first end of the four-way valve.

[0011] According to some embodiments of the present invention, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system further includes a first throttling element and a second one-way valve connected in parallel. One end of the first throttling element and the second one-way valve are both connected to the second heat exchanger, and the other end of the first throttling element and the second one-way valve are both connected to the third heat exchanger.

[0012] According to some embodiments of the present invention, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system further includes a second throttling element and a third one-way valve connected in parallel. One end of the second throttling element and the third one-way valve are both connected to the second end of the four-way valve, and the other end of the second throttling element and the third one-way valve are both connected to the first heat exchanger.

[0013] According to some embodiments of the present invention, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system further includes a fifth heat exchanger located indoors. The two ends of the fifth heat exchanger are respectively connected to the outlet end and the inlet end of the heat supply unit, and the heat supply unit can provide cooling or heating to the fifth heat exchanger.

[0014] According to some embodiments of the present invention, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system further includes an air conditioner inner unit casing, a first filter and a first fan. The air conditioner inner unit casing is provided with a first accommodating cavity. The first filter and the first fan are both located in the first accommodating cavity and connected to the air conditioner inner unit casing. The fifth heat exchanger, the second heat exchanger and the fourth heat exchanger are all located in the first accommodating cavity and are arranged sequentially between the first filter and the first fan.

[0015] According to some embodiments of the present invention, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system further includes an air conditioner outdoor unit casing, a second filter and a second fan. The air conditioner outdoor unit casing is provided with a second accommodating cavity. The first heat exchanger, the second filter and the second fan are all located in the second accommodating cavity and connected to the air conditioner outdoor unit casing. The first heat exchanger is located between the second filter and the second fan.

[0016] According to some embodiments of this utility model, the compressor, the four-way valve, and the third heat exchanger are all connected to the indoor unit casing or the outdoor unit casing of the air conditioner.

[0017] According to some embodiments of this utility model, the fifth heat exchanger, the second heat exchanger, and the fourth heat exchanger are all finned heat exchangers.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1This is a schematic diagram of the structure of a two-stage coupled air-cooled and water-cooled heat pump system according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a heat pump module in a dual-stage coupled air-cooled and water-cooled heat exchange heat pump system according to an embodiment of the present invention.

[0022] Icon labels:

[0023] 100. Compressor;

[0024] 200. Four-way valve;

[0025] 310. First heat exchanger; 320. Second heat exchanger; 330. Third heat exchanger; 340. Fourth heat exchanger; 350. Fifth heat exchanger;

[0026] 400. Hot and cold water supply unit;

[0027] 510. Three-way valve; 520. First check valve;

[0028] 610. Second check valve; 620. First throttling element; 630. Third check valve; 640. Second throttling element; 650. Electric regulating valve;

[0029] 710. Air conditioner indoor unit casing; 711. First accommodating cavity; 720. First filter; 730. First fan;

[0030] 810. Air conditioner outdoor unit casing; 811. Second accommodating cavity; 820. Second filter; 830. Second fan;

[0031] 900, Heat pump module. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] Reference Figure 1 and Figure 2 As shown, an embodiment of the present invention discloses a two-stage coupled air-cooled and water-cooled heat pump system, comprising a compressor 100, a four-way valve 200, a first heat exchanger 310, a second heat exchanger 320, a third heat exchanger 330, a heat / cold supply unit 400, an indoor unit casing 710, and an outdoor unit casing 810. The first heat exchanger 310 is located at the outdoor unit casing 810, and both the outdoor unit casing 810 and the first heat exchanger 310 are located outdoors, where the first heat exchanger 310 can exchange heat with ambient air. The second heat exchanger 320 and the indoor unit casing 710 are both located indoors, where the second heat exchanger 320 can exchange heat with indoor air.

[0037] Reference Figure 1 and Figure 2 As shown, the output end of the compressor 100 is connected to the first end (i) of the four-way valve 200. The first heat exchanger 310, the third heat exchanger 330, and the second heat exchanger 320 are sequentially connected and disposed between the second end (m) and the third end (j) of the four-way valve 200. That is, the second end (m) of the four-way valve 200 is connected to the first end (o1) of the first heat exchanger 310, the second end (o2) of the first heat exchanger 310 is connected to the first end (f1) of the third heat exchanger 330, the second end (f2) of the third heat exchanger 330 is connected to the first end (d1) of the second heat exchanger 320, and the second end (d2) of the second heat exchanger 320 is connected to the third end (j) of the four-way valve 200. The fourth end (k) of the four-way valve 200 is connected to the input end of the compressor 100 to realize the refrigerant circulation channel. With the switching of the four-way valve 200, this air-cooled and water-cooled dual-stage coupled heat exchange heat pump system can switch between cooling mode and heating mode.

[0038] Reference Figure 1 and Figure 2As shown, in the cooling mode of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system, the output end of the compressor 100 is connected to the first end (i) of the four-way valve 200, and the second end (m) of the four-way valve 200 is sequentially connected to the first heat exchanger 310, the third heat exchanger 330, and the second heat exchanger 320. That is, the refrigerant compressed by the compressor 100 sequentially passes through the first end (o1) and the second end (o2) of the first heat exchanger 310, the first end (f1) and the second end (f2) of the third heat exchanger 330, and the first end (d1) and the second end (d2) of the second heat exchanger 320. Both heat exchanger 310 and the third heat exchanger 330 function as condensers, improving the efficiency and effectiveness of refrigerant condensation. The heat supply unit 400 provides cooling to the third heat exchanger 330. The second heat exchanger 320 acts as an evaporator to cool the room. The third end (j) of the four-way valve 200 is connected to the output end (or second end (d2)) of the second heat exchanger 320, and the fourth end (k) of the four-way valve 200 is connected to the input end of the compressor 100. The evaporated refrigerant flows sequentially through the third end (j) and the fourth end (m) of the four-way valve 200 before entering the input end of the compressor 100, thus achieving refrigerant circulation. This air-cooled and water-cooled dual-stage coupled heat pump system can improve the operating efficiency of its cooling mode under extreme summer temperatures.

[0039] Reference Figure 1 and Figure 2 As shown, under the heating mode of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system, the output end of the compressor 100 is connected to the first end (i) of the four-way valve 200, and the third end (j) of the four-way valve 200 is sequentially connected to the second heat exchanger 320, the third heat exchanger 330, and the first heat exchanger 310. That is, the refrigerant compressed by the compressor 100 sequentially passes through the second end (d2) and the first end (d1) of the second heat exchanger 320, the second end (f2) and the first end (f1) of the third heat exchanger 330, and the second end (o2) of the first heat exchanger 310. The first end (o1) and the second heat exchanger 320 serve as condensers to provide heating to the room. The heat supply unit 400 provides heat to the third heat exchanger 330. The first heat exchanger 310 serves as an evaporator. The second end (m) of the four-way valve 200 is connected to the output end (i.e., the first end (o1)) of the first heat exchanger 310. The fourth end (k) of the four-way valve 200 is connected to the input end of the compressor 100. The evaporated refrigerant flows sequentially through the second end (m) and the fourth end (k) of the four-way valve 200 and then enters the input end of the compressor 100 to achieve refrigerant circulation.

[0040] Reference Figure 1 and Figure 2As shown, compared to traditional air-cooled direct expansion heat pump systems, the cooling and heating supply unit 400 of this air-cooled and water-cooled dual-stage coupled heat exchange heat pump system can supplement the cooling capacity in cooling mode, thereby avoiding the problem of excessively high external ambient air temperature affecting the normal operation of the cooling mode. In heating mode, it can supplement the heating capacity, thereby avoiding the problem of excessively low external ambient air temperature affecting the normal operation of the heating mode. This air-cooled and water-cooled dual-stage coupled heat exchange heat pump system can effectively reduce the dependence on ambient air temperature and ensure the normal operation of both cooling and heating modes.

[0041] Reference Figure 1 and Figure 2 As shown, it can be understood that the third heat exchanger 330 has a first heat exchange channel and a second heat exchange channel. The two ends of the first heat exchange channel are f1 and f2, respectively. The first end (f1) and the second end (f2) of the first heat exchange channel are connected to the first heat exchanger 310 and the second heat exchanger 320, respectively, so that the refrigerant can enter the first heat exchange channel during the circulation process, thereby allowing the refrigerant to exchange heat with the heat exchange fluid located in the second heat exchange channel.

[0042] Reference Figure 1 and Figure 2 As shown, specifically, the two ends of the second heat exchange channel are h1 and h2, respectively. The first end (h1) and the second end (h2) of the second heat exchange channel are connected to the outlet end (e1) and the inlet end (e2) of the heat supply unit 400, respectively. That is, the outlet end of the heat supply unit 400 can control the flow of heat exchange fluid into the second heat exchange channel to achieve heat exchange between the heat exchange fluid and the refrigerant located in the first heat exchange channel. The fluid flowing out of the second heat exchange channel can flow back to the heat supply unit 400 to achieve fluid circulation. Specifically, the refrigerant can be Freon, and the heat exchange fluid can be liquid water. That is, the third heat exchanger 330 can provide cooling to the refrigerant by water cooling or heating the refrigerant by water heating.

[0043] Reference Figure 1 and Figure 2 As shown, specifically, the heat pump 400 can utilize a liquid as the heat exchange medium. When the air-cooled and water-cooled dual-stage coupled heat pump system is in cooling mode, the heat pump 400 can introduce cold liquid water into the second heat exchange channel to provide cooling to the refrigerant flowing through the first heat exchange channel, causing the refrigerant to condense. When the air-cooled and water-cooled dual-stage coupled heat pump system is in heating mode, the heat pump 400 can introduce hot liquid water into the second heat exchange channel to provide heat to the refrigerant flowing through the first heat exchange channel, thereby increasing the refrigerant temperature.

[0044] Reference Figure 1 and Figure 2As shown, specifically, the heat supply unit 400 can adopt structures or methods such as air-cooled heat pump, chiller, indirect evaporative chiller, ice storage, water storage or natural cold source to provide cooling or heating.

[0045] Reference Figure 1 and Figure 2 As shown, the air-cooled and water-cooled two-stage coupled heat exchange heat pump system also includes a fourth heat exchanger 340, a three-way valve 510, and a first one-way valve 520. The inlet end of the three-way valve 510 is connected to the output end of the compressor 100. The first outlet end (a) of the three-way valve 510 is sequentially connected to the first end (c1) and the second end (c2) of the fourth heat exchanger 340, as well as the first one-way valve 520. The output end of the first one-way valve 520 and the second outlet end (b) of the three-way valve 510 are both connected to the first end (a) of the four-way valve 200. Specifically, the output end of the first one-way valve 520 is connected to the second outlet end (b) of the three-way valve 510, while the first end (a) of the four-way valve 200 is connected to the output end of the first one-way valve 520 and the second outlet end (b) of the three-way valve 510, which are connected in parallel.

[0046] Reference Figure 1 and Figure 2 As shown, specifically, the first one-way valve 520 opens away from the fourth heat exchanger 340 and closes towards the fourth heat exchanger 340. In both cooling and heating modes of this air-cooled and water-cooled dual-stage coupled heat pump system, the fourth heat exchanger 340 is used as a condenser to recover condensation heat. The system can be controlled by the three-way valve 510 to select whether refrigerant is introduced into the fourth heat exchanger 340.

[0047] Reference Figure 1 and Figure 2 As shown, specifically, in the cooling mode, the refrigerant output by the compressor 100 can pass through the inlet and first outlet (a) of the three-way valve 510, the first end (c1) and the second end (c2) of the fourth heat exchanger 340, and the first one-way valve 520 before entering the first end (i) of the four-way valve 200. That is, the fourth heat exchanger 340 is used as a first-stage condenser, the first heat exchanger 310 as a second-stage condenser, and the third heat exchanger 330 as a third-stage condenser. In other words, the air-cooled and water-cooled dual-stage coupled heat exchanger system can improve the condensation effect of the refrigerant before evaporation through multi-stage condensation, thereby improving the cooling effect and cooling capacity of the refrigerant in the room.

[0048] Reference Figure 1 and Figure 2As shown, in the heating mode, the refrigerant output by the compressor 100 can be selected to enter the four-way valve 200 after passing through the fourth heat exchanger 340 and the first one-way valve 520. That is, the fourth heat exchanger 340 acts as the first-stage condenser, and the second heat exchanger 320 acts as the second-stage condenser. This allows control over the heating effect and heating capacity of the indoor environment, thereby achieving the recovery and utilization of condensation heat.

[0049] When the first end (a) of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system controls the three-way valve 510 to be closed and the second end (b) to be open, the refrigerant flowing out from the compressor 100 enters the three-way valve 510 and flows out from the second end (b). Since the first one-way valve 520 prevents backflow in the direction leading to the fourth heat exchanger 340, the refrigerant can be directly introduced into the first end (i) of the four-way valve 200, that is, the refrigerant is not in the fourth heat exchanger 340.

[0050] Reference Figure 1 and Figure 2 As shown, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system also includes a first throttling element 620 and a second one-way valve 610 connected in parallel. The first throttling element 620 and the second one-way valve 610 together form a first throttling component. One end of both the first throttling element 620 and the second one-way valve 610 is connected to the first end (d1) of the second heat exchanger 320, and the other end of both the first throttling element 620 and the second one-way valve 610 is connected to the second end (f2) of the third heat exchanger 330. Specifically, the conduction direction of the second one-way valve 610 is from the second heat exchanger 320 to the third heat exchanger 330, and the check direction of the second one-way valve 610 is from the third heat exchanger 330 to the second heat exchanger 320.

[0051] Reference Figure 1 and Figure 2 As shown, when the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system is in cooling mode, the refrigerant can pass through the third heat exchanger 330, the first throttling element 620 and the second heat exchanger 320 in sequence under the backflow prevention action of the second one-way valve 610. The first throttling element 620 can throttle the refrigerant flowing out of the third heat exchanger 330 to improve the evaporative cooling effect of the refrigerant at the second heat exchanger 320.

[0052] Reference Figure 1 and Figure 2 As shown, when the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system is in heating mode, since the conduction direction of the second one-way valve 610 is consistent with the flow direction of the refrigerant, that is, from the second heat exchanger 320 to the third heat exchanger 330, the refrigerant can directly flow from the second heat exchanger 320 to the third heat exchanger 330 through the second one-way valve 610 without passing through the first throttling element 620.

[0053] Reference Figure 1 and Figure 2 As shown, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system also includes a second throttling element 640 and a third one-way valve 630 connected in parallel. The second throttling element 640 and the third one-way valve 630 together form a second throttling component. One end of each of the second throttling element 640 and the third one-way valve 630 is connected to the second end (m) of the four-way valve 200, and the other end of each is connected to the first end (o1) of the first heat exchanger 310. Specifically, the conduction direction of the third one-way valve 630 is from the second end (m) of the four-way valve 200 toward the first heat exchanger 310, and the check direction of the first one-way valve 520 is from the first heat exchanger 310 toward the second end (m) of the four-way valve 200.

[0054] Reference Figure 1 and Figure 2 As shown, when the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system is in cooling mode, since the opening of the third one-way valve 630 is consistent with the flow direction of the refrigerant, that is, from the four-way valve 200 to the first heat exchanger 310, the refrigerant can directly flow from the four-way valve 200 to the first heat exchanger 310 through the third one-way valve 630 without passing through the second throttling element 640.

[0055] Reference Figure 1 and Figure 2 As shown, in the heating mode, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system allows the refrigerant to pass sequentially through the first heat exchanger 310, the second throttling element 640, and the four-way valve 200 under the backflow prevention action of the third one-way valve 630. The second throttling element 640 can throttle the refrigerant flowing out of the first heat exchanger 310, thereby reducing pressure and controlling the flow rate.

[0056] Reference Figure 1 and Figure 2 As shown, it should be noted that the first throttling element 620 and the second throttling element 640 can be throttling elements such as thermal expansion valves, electronic expansion valves, capillary tubes or throttling tubes.

[0057] Reference Figure 1 and Figure 2 As shown, it can be understood that the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system also includes a fifth heat exchanger 350, a first filter 720 and a first fan 730 located indoors. The two ends of the fifth heat exchanger 350 are respectively connected to the outlet end and the inlet end of the heat supply unit 400, and the heat supply unit 400 can provide cooling or heating to the fifth heat exchanger 350.

[0058] Reference Figure 1 and Figure 2As shown, the air conditioner indoor unit casing 710 has a first receiving cavity 711. A first filter 720 and a first fan 730 are both located within the first receiving cavity 711 and connected to the air conditioner indoor unit casing 710. A fifth heat exchanger 350, a second heat exchanger 320, and a fourth heat exchanger 340 are all located within the first receiving cavity 711 and are arranged sequentially between the first filter 720 and the first fan 730. That is, driven by the first fan 730, air enters the room and must pass sequentially through the first filter 720, the fifth heat exchanger 350, the second heat exchanger 320, the fourth heat exchanger 340, and the first fan 730.

[0059] Reference Figure 1 and Figure 2 As shown, in the cooling mode of this air-cooled and water-cooled dual-stage coupled heat exchange heat pump system, the air first passes through the first filter 720 for filtration, thereby improving the air cleanliness. The heat supply unit 400 can provide cooling capacity to the fifth heat exchanger 350, which can act as a surface cooler, thus initially achieving dehumidification and cooling of the air. Then, the air flows through the second heat exchanger 320, thereby achieving secondary dehumidification and cooling of the air. The fourth heat exchanger 340 can optionally perform reheating treatment of the air. Whether the fourth heat exchanger 340 is in heating mode can be controlled by controlling the refrigerant flow direction through the three-way valve 510. The condensation heat of the compressor 100 that is not recovered by the fourth heat exchanger 340 can be dissipated to the outdoor airflow through the first heat exchanger 310. The condensation heat that is not dissipated from the first heat exchanger 310 can be transferred to the outside through the third heat exchanger 330.

[0060] Reference Figure 1 and Figure 2 As shown, in heating mode, the fifth heat exchanger 350 of this air-cooled and water-cooled dual-stage coupled heat exchange heat pump system can still function as a primary condenser, while the second heat exchanger 320 functions as a secondary condenser. Air is first filtered by the first filter 720 to improve air cleanliness. The heat supply unit 400 provides heat to the fifth heat exchanger 350, initially raising the air temperature. Then, the air flows through the second heat exchanger 320 for a secondary temperature increase. The fourth heat exchanger 340 can optionally reheat the air. Whether the fourth heat exchanger 340 is in heating mode can be controlled by the refrigerant flow direction via the three-way valve 510 to achieve indoor heating.

[0061] Reference Figure 1 and Figure 2As shown, it can be understood that the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system also includes a second filter 820 and a second fan 830. The air conditioner outdoor unit casing 810 is provided with a second accommodating cavity 811. The first heat exchanger 310, the second filter 820 and the second fan 830 are all located in the second accommodating cavity 811 and connected to the air conditioner outdoor unit casing 810. The first heat exchanger 310 is located between the second filter 820 and the second fan 830.

[0062] Reference Figure 1 and Figure 2 As shown, driven by the second fan 830, outdoor air can pass through the second filter 820, the first heat exchanger 310 and the second fan 830 in sequence. The second filter 820 can effectively filter large particles, thereby reducing the risk of damage to the first heat exchanger 310 and the second fan 830 caused by large particles mixed in the air. The outdoor airflow can exchange heat with the refrigerant in the first heat exchanger 310, thereby realizing the condensation or evaporation of the refrigerant.

[0063] Reference Figure 1 and Figure 2 As shown, it should be noted that the first fan 730 and the second fan 830 can be either AC motors or DC brushless motors, and can be axial flow fans, mixed flow fans, or centrifugal fans, etc., with no limitation on the air outlet direction. The first filter 720 and the second filter 820 can be filter cotton, which filters impurities in the air by limiting the pore size.

[0064] It should be understood that, in some other embodiments, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system may have a primary, medium-efficiency, and high-efficiency filter or purifier installed in the air conditioner housing 710.

[0065] It should be understood that in some other embodiments, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system has a humidifier inside the air conditioner housing 710, which can conveniently regulate the humidity of the indoor air, thereby creating a suitable living environment for users.

[0066] Reference Figure 1 and Figure 2 As shown, it can be understood that in this embodiment, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system also includes an electric regulating valve 650. The two ends of the electric regulating valve 650 are respectively connected to the inlet end (e2) of the third heat exchanger 330 and the heat supply unit 400. That is, the heat supply unit 400 can be connected to the third heat exchanger 330 through the electric regulating valve 650, thereby allowing the heat exchange fluid to be introduced into the second heat exchange flow path of the third heat exchanger 330.

[0067] Reference Figure 1 and Figure 2As shown, the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system can adjust the opening of the pipeline through the electric regulating valve 650, thereby controlling the flow rate and velocity of the heat exchange fluid supplied by the heat supply unit 400 to the third heat exchanger 330, and thus controlling the heat exchange efficiency of the third heat exchanger 330 to adapt to different ambient temperatures and usage scenarios.

[0068] Reference Figure 1 and Figure 2 As shown, it is understood that the compressor 100, four-way valve 200, and third heat exchanger 330 are all connected to the air conditioner outdoor unit casing 810. Specifically, the compressor 100, four-way valve 200, third heat exchanger 330, first one-way valve 520, second one-way valve 610, first throttling element 620, third heat exchanger 330, third one-way valve 630, second throttling valve, and electric regulating valve 650 together constitute the heat pump module 900. The heat pump module 900 can be installed outdoors and connected to the air conditioner outdoor unit casing 810, thereby reducing the impact of noise on the indoor environment and avoiding the occupation of indoor space.

[0069] It should be understood that, in some other embodiments, specifically, the compressor 100, the four-way valve 200, the third heat exchanger 330, the first one-way valve 520, the second one-way valve 610, the first throttling element 620, the third heat exchanger 330, the third one-way valve 630, the second throttling valve, and the electric regulating valve 650 together constitute a heat pump module 900. The heat pump module 900 can be installed indoors and connected to the air conditioner indoor unit casing 710, or the heat pump module 900 can be connected.

[0070] Reference Figure 1 and Figure 2 As shown, it can be understood that in this embodiment, the fifth heat exchanger 350, the second heat exchanger 320, and the fourth heat exchanger 340 are all finned heat exchangers, in order to increase the contact area between the fifth heat exchanger 350, the second heat exchanger 320, and the fourth heat exchanger 340 and the air, thereby improving the heat exchange efficiency between the fifth heat exchanger 350, the second heat exchanger 320, and the fourth heat exchanger 340 and the indoor air, so as to improve the cooling efficiency or heating efficiency of the indoor temperature.

[0071] Reference Figure 1 and Figure 2 As shown, the third heat exchanger 330 can be a liquid medium heat exchanger. Specifically, the third heat exchanger 330 can be a plate heat exchanger, a shell-and-tube heat exchanger, a shell-and-tube heat exchanger, etc., to cooperate with the heat supply unit 400 to achieve liquid cooling or liquid heating of the third heat exchanger 330.

[0072] It should be understood that in some other embodiments, the heat pump module 900 is connected to refrigeration components such as filters, oil separators, liquid storage tanks or gas-liquid separators in the refrigerant circulation loop to improve the cooling or heating efficiency of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system.

[0073] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A two-stage coupled heat exchange heat pump system of air cooling and water cooling, characterized in that, include: The compressor (100), four-way valve (200), first heat exchanger (310), second heat exchanger (320), third heat exchanger (330) and heat / cooling supply (400) are provided, wherein the first heat exchanger (310) is located outdoors, the second heat exchanger (320) is located indoors, and the heat / cooling supply (400) is configured to provide cooling or heating to the third heat exchanger (330). In the cooling mode of the air-cooled and water-cooled dual-stage coupled heat exchanger system, the output end of the compressor (100) is connected to the first end of the four-way valve (200), the second end of the four-way valve (200) is connected to the first heat exchanger (310), the third heat exchanger (330) and the second heat exchanger (320) in sequence, the first heat exchanger (310) and the third heat exchanger (330) both serve as condensers, the heat supply unit (400) is used to provide cooling capacity to the third heat exchanger (330), the second heat exchanger (320) serves as an evaporator, the third end of the four-way valve (200) is connected to the output end of the second heat exchanger (320), and the fourth end of the four-way valve (200) is connected to the input end of the compressor (100). Under the heating mode of the air-cooled and water-cooled dual-stage coupled heat exchange heat pump system, the output end of the compressor (100) is connected to the first end of the four-way valve (200), the third end of the four-way valve (200) is connected to the second heat exchanger (320), the third heat exchanger (330) and the first heat exchanger (310) in sequence, the second heat exchanger (320) serves as a condenser, the heat supply unit (400) is used to provide heat to the third heat exchanger (330), the first heat exchanger (310) serves as an evaporator, the second end of the four-way valve (200) is connected to the output end of the first heat exchanger (310), and the fourth end of the four-way valve (200) is connected to the input end of the compressor (100).

2. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 1, characterized in that: The third heat exchanger (330) has a first heat exchange channel and a second heat exchange channel. The two ends of the first heat exchange channel are connected to the first heat exchanger (310) and the second heat exchanger (320) respectively, and the two ends of the second heat exchange channel are connected to the inlet end and the outlet end of the hot and cold supply device (400) respectively.

3. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 1, characterized in that: It also includes a fourth heat exchanger (340), a three-way valve (510), and a first check valve (520). The inlet end of the three-way valve (510) is connected to the output end of the compressor (100). The first outlet end of the three-way valve (510) is sequentially connected to the fourth heat exchanger (340) and the first check valve (520). The output end of the first check valve (520) and the second outlet end of the three-way valve (510) are both connected to the first end of the four-way valve (200).

4. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 1, characterized in that: It also includes a first throttling element (620) and a second one-way valve (610) connected in parallel. One end of the first throttling element (620) and the second one-way valve (610) are both connected to the second heat exchanger (320), and the other end of the first throttling element (620) and the second one-way valve (610) are both connected to the third heat exchanger (330).

5. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 4, characterized in that: It also includes a second throttling element (640) and a third check valve (630) connected in parallel. One end of the second throttling element (640) and the third check valve (630) are both connected to the second end of the four-way valve (200), and the other end of the second throttling element (640) and the third check valve (630) are both connected to the first heat exchanger (310).

6. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 3, characterized in that: It also includes a fifth heat exchanger (350) located indoors, the two ends of which are connected to the outlet and inlet of the heat supply unit (400) respectively, and the heat supply unit (400) can provide cooling or heating to the fifth heat exchanger (350).

7. The air-cooled and water-cooled two-stage coupled heat transfer heat pump system according to claim 6, characterized in that: It also includes an air conditioner inner unit housing (710), a first filter (720) and a first fan (730). The air conditioner inner unit housing (710) is provided with a first accommodating cavity (711). The first filter (720) and the first fan (730) are both located in the first accommodating cavity (711) and connected to the air conditioner inner unit housing (710). The fifth heat exchanger (350), the second heat exchanger (320) and the fourth heat exchanger (340) are all located in the first accommodating cavity (711) and are arranged sequentially between the first filter (720) and the first fan (730).

8. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 7, characterized in that: It also includes an air conditioner outdoor unit housing (810), a second filter (820), and a second fan (830). The air conditioner outdoor unit housing (810) is provided with a second accommodating cavity (811). The first heat exchanger (310), the second filter (820), and the second fan (830) are all located in the second accommodating cavity (811) and connected to the air conditioner outdoor unit housing (810). The first heat exchanger (310) is located between the second filter (820) and the second fan (830).

9. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 8, characterized in that: The compressor (100), the four-way valve (200), and the third heat exchanger (330) are all connected to the air conditioner inner casing (710) or the air conditioner outer casing (810).

10. The air-cooled and water-cooled two-stage coupled heat exchange heat pump system according to claim 6, characterized in that: The fifth heat exchanger (350), the second heat exchanger (320) and the fourth heat exchanger (340) are all finned heat exchangers.

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