Outdoor unit assembly, air source heat pump unit and control method of air source heat pump unit

Abstract

The invention discloses an outdoor unit assembly, an air source heat pump unit and a control method of the air source heat pump unit. The outdoor unit assembly is characterized in that a first valve port of a first control valve communicates with a first water port of a heat exchanger; a third valve port of the second control valve is communicated with a second water port of the heat exchanger through a first connecting pipe, the third valve port is selectively communicated with a fourth valve port, one of the second valve port and the fourth valve port is communicated with a water inlet pipeline, the other one is communicated with a water outlet pipeline, and a first frost valve is arranged on the first connecting pipe; a third water port of the water pump is located above a fourth water port of the water pump and communicates with the first water port, and the fourth water port communicates with the first valve port. The two ends of the third connecting pipe communicate with a fifth valve port of the first control valve and the first water opening correspondingly, and the first valve port selectively communicates with the second valve port or the fifth valve port. According to the outdoor unit assembly, water stored in the outdoor unit assembly can be emptied in a low-temperature state, the anti-freezing performance is improved, and the problem that the water pump is damaged due to freezing can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air handling equipment, and more specifically, to an outdoor unit component, an air source heat pump unit and a control method thereof. Background Art

[0002] In the related art, when the outdoor unit assembly is in a lower temperature range in winter and is turned off, the internal structure of the outdoor unit assembly may be at risk of freezing or being damaged by frost. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an outdoor unit assembly, which can empty the internal water under low temperature conditions, improve the antifreeze performance, and avoid the problem of damage caused by freezing of the water pump.

[0004] Another object of the present invention is to provide an air source heat pump unit having the above outdoor unit assembly.

[0005] Another object of the present invention is to provide a control method for the air source heat pump unit.

[0006] According to an embodiment of the present invention, an outdoor unit assembly includes: a heat exchanger, wherein the heat exchanger has a heat exchange flow path, and the heat exchanger has a first water port and a second water port connected to the heat exchange flow path; a first control valve, wherein the first control valve has a first valve port and a second valve port, the first valve port is connected to the first water port, and the first valve port can be selectively connected to or disconnected from the second valve port; a second control valve, wherein the second control valve has a third valve port and a fourth valve port, the third valve port is connected to the second water port through a first connecting pipe, the third valve port can be selectively connected to or disconnected from the fourth valve port, and one of the second valve port and the fourth valve port is connected to a water inlet pipeline, And the other is connected to the water outlet pipeline, the first connecting pipe is provided with a first antifreeze valve, when the first antifreeze valve is opened, the liquid in the heat exchanger is discharged from the first antifreeze valve; a water pump, the water pump has a third water port and a fourth water port, the third water port is located above the fourth water port, the third water port is connected to the first water port, and the fourth water port is connected to the first valve port, so as to drive the liquid to flow between the heat exchanger and the water use end; the third connecting pipe, the first control valve also has a fifth valve port, the two ends of the third connecting pipe are respectively connected to the fifth valve port and the first water port, and the first valve port can be selectively connected to the fifth valve port.

[0007] According to the outdoor unit component of the embodiment of the present invention, the third water inlet of the water pump is connected to the first water inlet of the heat exchanger, the fourth water inlet of the water pump is connected to the first valve port of the first control valve, the second water inlet of the heat exchanger is connected to the third valve port of the second control valve through the first connecting pipe, and the first connecting pipe is provided with a first antifreeze valve. When the first antifreeze valve is opened, the liquid in the heat exchanger is discharged from the first antifreeze valve through the first connecting pipe, so that the outdoor unit component can empty the internal water under low temperature conditions, which is beneficial to improving the antifreeze performance. The two ends of the third connecting pipe are respectively connected to the fifth valve port and the first water inlet of the first control valve, which can ensure that the water in the water pump is completely discharged, avoiding problems such as damage caused by freezing of the water pump.

[0008] In addition, the outdoor unit assembly according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to the outdoor unit assembly of some embodiments of the present invention, the first water inlet is formed as a water inlet, which is connected to the water inlet pipe, and the second water inlet is formed as a water outlet, which is connected to the water outlet pipe; or, the first water inlet is formed as a water outlet, which is connected to the water outlet pipe, and the second water inlet is formed as a water inlet, which is connected to the water inlet pipe.

[0010] According to some embodiments of the present invention, the outdoor unit assembly further includes: a buffer water tank, wherein the buffer water tank is connected in series between the water inlet and the water inlet pipeline.

[0011] According to some embodiments of the present invention, the outdoor unit assembly further includes: a shell, the heat exchanger is located in the shell, and at least one of the first control valve, the second control valve and the first antifreeze valve is disposed in the shell.

[0012] According to some embodiments of the present invention, the third water inlet is connected to the first water inlet through a second connecting pipe.

[0013] According to some embodiments of the present invention, the water pump and the first control valve are both located above the heat exchanger, the fourth water port is located at the lower end of the water pump, and the fifth valve port is located below the first valve port.

[0014] According to some embodiments of the present invention, the water pump and the heat exchanger are arranged in a horizontal direction.

[0015] According to some embodiments of the present invention, the first control valve further has a sixth valve port, and the outdoor unit assembly further includes: an expansion tank, the expansion tank is always connected to the sixth valve port, and the first valve port is always connected to the sixth valve port.

[0016] According to some embodiments of the present invention, the outdoor unit assembly further includes: a connecting branch, which extends in an up-down direction and connects the first water inlet and the second water inlet, and a second antifreeze valve for controlling the opening and closing of the connecting branch is provided on the connecting branch.

[0017] The air source heat pump unit according to the embodiment of the present invention comprises the outdoor unit assembly and the water use terminal according to the embodiment of the present invention, and the outdoor unit assembly and the water use terminal are connected through the water inlet pipeline and the water outlet pipeline.

[0018] According to the air source heat pump unit of the embodiment of the present invention, the third water inlet of the water pump is connected with the first water inlet of the heat exchanger, the fourth water inlet of the water pump is connected with the first valve port of the first control valve, the second water inlet of the heat exchanger is connected with the third valve port of the second control valve through the first connecting pipe, and the first connecting pipe is provided with a first antifreeze valve. When the first antifreeze valve is opened, the liquid in the heat exchanger is discharged from the first antifreeze valve through the first connecting pipe, so that the outdoor unit component can empty the internal water under low temperature state, which is beneficial to improve the antifreeze performance, and the two ends of the third connecting pipe are respectively connected with the fifth valve port and the first water inlet of the first control valve, which can ensure that the water in the water pump is completely discharged, and avoid the problem of damage caused by freezing of the water pump.

[0019] According to an embodiment of the present invention, a control method for an air source heat pump unit includes an outdoor unit component according to an embodiment of the present invention, and the control method for the air source heat pump unit includes: when the air source heat pump unit is shut down or powered off, controlling the second control valve to close, controlling the first valve port to be connected to the fifth valve port, and controlling the first antifreeze valve to close; obtaining the ambient temperature, the ambient temperature including the outdoor ambient temperature and / or the water temperature passing through the first connecting pipe; when the ambient temperature is lower than a preset temperature, the first antifreeze valve opens.

[0020] According to the control method of the air source heat pump unit in the embodiment of the present invention, the third water inlet of the water pump is connected with the first water inlet of the heat exchanger, the fourth water inlet of the water pump is connected with the first valve port of the first control valve, the second water inlet of the heat exchanger is connected with the third valve port of the second control valve through the first connecting pipe, and the first connecting pipe is provided with a first antifreeze valve. When the first antifreeze valve is opened, the liquid in the heat exchanger is discharged from the first antifreeze valve through the first connecting pipe, so that the outdoor unit component can empty the internal water under low temperature state, which is beneficial to improve the antifreeze performance, and the two ends of the third connecting pipe are respectively connected with the fifth valve port and the first water inlet of the first control valve, which can ensure that the water in the water pump is completely discharged, and avoid the problem of damage caused by freezing of the water pump.

[0021] According to some embodiments of the present invention, when the ambient temperature is lower than a preset temperature, the first antifreeze valve opens, including: when the ambient temperature drops to a first temperature range, the first antifreeze valve opens to a first opening degree; when the ambient temperature drops to a second temperature range, the first antifreeze valve opens to a second opening degree; wherein the minimum temperature in the first temperature range is greater than the maximum temperature in the second temperature range, and the first opening degree is less than the second opening degree.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a schematic structural diagram of an outdoor unit assembly according to a first embodiment of the present invention;

[0025] Figure 2 is a partial structural schematic diagram of an outdoor unit assembly according to a second embodiment of the present invention;

[0026] Figure 3 is a right side view of an outdoor unit assembly according to a second embodiment of the present invention;

[0027] Figure 4 is a front view of an outdoor unit assembly according to a second embodiment of the present invention;

[0028] Figure 5 is a partial structural schematic diagram of an outdoor unit assembly according to a third embodiment of the present invention;

[0029] Figure 6 is a right side view of an outdoor unit assembly according to a third embodiment of the present invention;

[0030] Figure 7 is a front view of an outdoor unit assembly according to a third embodiment of the present invention;

[0031] Figure 8 is a structural schematic diagram of a first control valve according to an embodiment of the present invention from an angle;

[0032] Fig. 9 is a structural schematic diagram of a first control valve according to another angle of an embodiment of the present invention;

[0033] Fig.10 yes Fig. 9 A cross-sectional view along the direction indicated by line AA;

[0034] Fig.11is a structural schematic diagram of a first control valve according to an embodiment of the present invention from another angle;

[0035] Fig.12 yes Fig.11 A cross-sectional view along the direction indicated by line BB;

[0036] Fig.13 is a cross-sectional view of a first control valve according to an embodiment of the present invention, wherein the first valve port is disconnected from the fifth valve port;

[0037] Fig.14 is a partial structural schematic diagram of an outdoor unit assembly according to a fourth embodiment of the present invention at an angle;

[0038] Fig.15 is a partial structural schematic diagram from another angle of an outdoor unit assembly according to a fourth embodiment of the present invention;

[0039] Fig.16 is a partial structural schematic diagram of an outdoor unit assembly according to a fifth embodiment of the present invention at an angle;

[0040] Fig.17 is a partial structural schematic diagram from another angle of an outdoor unit assembly according to a fifth embodiment of the present invention;

[0041] Fig.18 is a partial structural schematic diagram of an outdoor unit assembly according to a fifth embodiment of the present invention at an angle (wherein the housing is not shown);

[0042] Fig.19 is a partial structural schematic diagram of an outdoor unit assembly according to a fifth embodiment of the present invention from another angle (wherein the housing is not shown);

[0043] Fig. 20 1 is a partial structural schematic diagram of an outdoor unit assembly according to a fifth embodiment of the present invention from another angle (wherein the housing is not shown).

[0044] Reference numerals:

[0045] 100. Outdoor unit components;

[0046] 10. Heat exchanger; 11. First water inlet; 12. Second water inlet; 13. One-way valve;

[0047] 21, first control valve; 22, second control valve; 211, first valve port; 212, second valve port; 213, fifth valve port; 214, sixth valve port; 215, valve core; 216, electric actuator; 217, valve body; 221, third valve port; 222, fourth valve port;

[0048] 30. First antifreeze valve;

[0049] 41. Shell; 42. Water pump; 43. Expansion tank; 411. Chassis; 412. Partition plate; 413. Connecting base; 414. Column; 415. Connecting plate; 416. First bracket; 417. Second bracket; 421. Third water inlet; 422. Fourth water inlet;

[0050] 50. connecting branch; 51. second antifreeze valve;

[0051] 61. first connecting pipe; 62. second connecting pipe; 63. third connecting pipe; 64. fourth connecting pipe; 621. air intake valve;

[0052] 71, first channel; 72, second channel; 73, third channel; 74, fourth channel;

[0053] 80. Snap-on fitting; 81. Condenser. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, a first feature "above" or "below" the second feature may include the first and second features being directly in contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, and a first feature "above", "above" and "above" the second feature may include the first feature being directly above or diagonally above the second feature, or may simply mean that the first feature is horizontally higher than the second feature.

[0057] The outdoor unit assembly 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0058] Reference Figure 1-Figure 15 As shown, the air source heat pump unit according to the embodiment of the present invention includes a water-using terminal and an outdoor unit assembly 100 according to the embodiment of the present invention, and the outdoor unit assembly 100 and the water-using terminal are connected through a water inlet pipe and a water outlet pipe. The outdoor unit assembly 100 according to the embodiment of the present invention may include: a heat exchanger 10, a first control valve 21 and a second control valve 22.

[0059] Specifically, the heat exchanger 10 has a heat exchange flow path, and the heat exchanger 10 has a first water port 11 and a second water port 12, and the first water port 11 and the second water port 12 are connected to the heat exchange flow path. The first control valve 21 has a first valve port 211 and a second valve port 212, and the first valve port 211 is connected to the first water port 11, and the second valve port 212 is connected to the water outlet pipeline. The second control valve 22 has a third valve port 221 and a fourth valve port 222, and the third valve port 221 is connected to the second water port 12 through the first connecting pipe 61, and the fourth valve port 222 is connected to the water inlet pipeline. The first valve port 211 can be selectively connected or disconnected with the second valve port 212, and the third valve port 221 can be selectively connected or disconnected with the fourth valve port 222.

[0060] Thus, when the outdoor unit assembly 100 is powered on, the first valve port 211 is connected to the second valve port 212, and the third valve port 221 is connected to the fourth valve port 222, so that the first water port 11 is connected to the water outlet pipeline, and the second water port 12 is connected to the water inlet pipeline. The water at the end of the water use can flow through the fourth valve port 222 and the third valve port 221, and enter the heat exchanger 10 from the second water port 12 through the first connecting pipe 61, and the water is heat-exchanged by the refrigerant (such as Freon, etc.) in the heat exchanger 10. The water after heat exchange can flow out from the first water port 11, and flow into the water outlet pipeline through the first valve port 211 and the second valve port 212 to meet the required water demand. For example, the water inlet pipeline can be a floor heating system, a shower system, etc. located indoors.

[0061] When the outdoor unit assembly 100 is powered off, the first valve port 211 is disconnected from the second valve port 212, and the third valve port 221 is disconnected from the fourth valve port 222, so that the heat exchanger 10 is disconnected from the water inlet pipe and the water outlet pipe, preventing water in the water use end from entering the heat exchanger 10, making it easier to repair or replace the interior of the outdoor unit assembly 100.

[0062] The inventor of the present application has found that in the related art, when the outdoor unit assembly is in a low temperature range in winter and is turned off, the internal structure (such as the heat exchanger, etc.) in the outdoor unit assembly is at risk of freezing or freezing. In order to solve the problem that the internal structure in the outdoor unit assembly is easily frozen or frozen, in the present invention, Figure 1-Figure 7As shown, the first antifreeze valve 30 is provided on the first connecting pipe 61. Therefore, when the outdoor unit assembly 100 is in a relatively low temperature range in winter and is turned off, the first valve port 211 is disconnected from the second valve port 212, and the third valve port 221 is disconnected from the fourth valve port 222. When the first antifreeze valve 30 is opened, the water stored in the heat exchanger 10 can flow to the first connecting pipe 61 due to gravity, and be discharged through the first antifreeze valve 30 on the first connecting pipe 61, so that the outdoor unit assembly 100 can empty the internal water at a low temperature, which is beneficial to improving the antifreeze performance.

[0063] In addition, if Figure 2-Figure 7 , Figure 14-Figure 20 As shown, the outdoor unit assembly 100 also includes a water pump 42, and the water pump 42 has a third water inlet 421 and a fourth water inlet 422. The third water inlet 421 is connected to the first water inlet 11, and the fourth water inlet 422 is connected to the first valve port 211. The third water inlet 421 is located above the fourth water inlet 422. The water pump 42 can drive the liquid to flow between the heat exchanger 10 and the water use end. The driving force is provided by the water pump 42 to realize the circulation of the liquid, which facilitates the liquid to enter the heat exchanger 10 for heat exchange, thereby meeting the flow requirements of the liquid.

[0064] At the same time, if Figure 8-Figure 13 As shown, the outdoor unit assembly 100 also includes a third connecting pipe 63, and the first control valve 21 also has a fifth valve port 213. Both ends of the third connecting pipe 63 are respectively connected to the fifth valve port 213 and the first water port 11, and the first valve port 211 can be selectively connected to the fifth valve port 213.

[0065] Thus, when the outdoor unit assembly 100 is powered on, the first valve port 211 is connected to the second valve port 212, so that the water pump 42 can drive the water in the water inlet pipe to flow through the fourth valve port 222 and the third valve port 221, and enter the heat exchanger 10 from the second water port 12 through the first connecting pipe 61, thereby realizing heat exchange of the liquid. Then, the liquid after heat exchange can flow out of the heat exchanger 10 from the first water port 11, and flow into the water pump 42 from the third water port 421. The water pump 42 can drive the liquid, so that the liquid can flow out from the fourth water port 422, and flow into the water outlet pipe through the first valve port 211 and the second valve port 212, thereby meeting the required usage requirements. When the outdoor unit assembly 100 is powered off, the first valve port 211 is connected to the fifth valve port 213, so that the water in the water pump 42 can directly flow into the third connecting pipe 63 through the first valve port 211 and the fifth valve port 213, and flow through the third connecting pipe 63 to enter the heat exchanger 10 from the first water port 11, and be discharged through the first antifreeze valve 30 on the first connecting pipe 61, so that the water in the water pump 42 can be discharged through the first antifreeze valve 30, ensuring that the water in the water pump 42 is completely discharged, avoiding the water pump 42 from freezing and causing damage, and other problems, so that the outdoor unit assembly 100 can empty the internal water under low temperature conditions, which is beneficial to improving the antifreeze performance.

[0066] Of course, the second valve port 212 may be connected to the water inlet pipeline, and the fourth valve port 222 may be connected to the water outlet pipeline, which is also within the protection scope of the present invention.

[0067] In the embodiment of the present invention, the opening and closing state of the first antifreeze valve 30 can be set according to actual conditions.

[0068] For example, in some embodiments, when the outdoor unit assembly 100 is in a lower temperature range in winter and is turned off, when the first antifreeze valve 30 detects that the water temperature in the first connecting pipe 61 is lower than 3°C, the first antifreeze valve 30 is controlled to be in a half-open state, so that the stored water can slowly drip out from the first antifreeze valve 30, which is convenient for the outdoor unit assembly 100 to quickly heat up after startup, and to facilitate subsequent drainage, avoiding the risk of freezing damage; when the first antifreeze valve 30 detects that the water temperature in the first connecting pipe 61 is lower than 1°C, the first antifreeze valve 30 is controlled to be in a fully open state, so that the stored water can quickly flow out of the first antifreeze valve 30, ensuring that the water is completely drained before the stored water freezes, and automatic drainage can be achieved, completely eliminating the hidden dangers of freezing damage. For example, the first antifreeze valve 30 has a temperature control probe, and the water temperature is detected by the temperature control probe.

[0069] In some embodiments, the heat exchanger 10 has an inlet and an outlet. The refrigerant can enter the heat exchanger 10 through the inlet and flow out of the heat exchanger 10 through the outlet, thereby realizing the circulation of the refrigerant in the heat exchanger 10 and meeting the heat exchange requirements of the heat exchanger 10.

[0070] In some embodiments, the first control valve 21 and the water outlet pipeline or the water inlet pipeline can be connected by threads to achieve communication between the second valve port 212 and the water outlet pipeline or the water inlet pipeline, ensuring that the first control valve 21 is reliably connected to the water outlet pipeline or the water inlet pipeline, and is easy to disassemble, maintain or replace. For example, the first control valve 21 can be provided with an external thread connected to the water outlet pipeline at the second valve port 212, and the first control valve 21 and the water outlet pipeline are connected by a union nut to ensure reliable connection and facilitate assembly.

[0071] According to the outdoor unit assembly 100 of the embodiment of the present invention, the third water inlet 421 of the water pump 42 is connected to the first water inlet 11 of the heat exchanger 10, the fourth water inlet 422 of the water pump 42 is connected to the first valve port 211 of the first control valve 21, the second water inlet 12 of the heat exchanger 10 is connected to the third valve port 221 of the second control valve 22 through the first connecting pipe 61, and the first antifreeze valve 30 is provided on the first connecting pipe 61. When the first antifreeze valve 30 is opened, the liquid in the heat exchanger 10 is discharged from the first antifreeze valve 30 through the first connecting pipe 61, so that the outdoor unit assembly 100 can empty the internal water under low temperature state, which is beneficial to improving the antifreeze performance, and the two ends of the third connecting pipe 63 are respectively connected to the fifth valve port 213 of the first control valve 21 and the first water inlet 11, which can ensure that the water in the water pump 42 is completely discharged, and avoid the water pump 42 from freezing and causing damage.

[0072] Since the outdoor unit assembly 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the air source heat pump unit according to the embodiment of the present invention is connected to the first water inlet 11 of the heat exchanger 10 through the third water inlet 421 of the water pump 42, the fourth water inlet 422 of the water pump 42 is connected to the first valve port 211 of the first control valve 21, the second water inlet 12 of the heat exchanger 10 is connected to the third valve port 221 of the second control valve 22 through the first connecting pipe 61, and the first connecting pipe 61 is provided with a first antifreeze valve 30. When the first antifreeze valve 30 is opened, the liquid in the heat exchanger 10 is discharged from the first antifreeze valve 30 through the first connecting pipe 61, so that the outdoor unit assembly 100 can empty the internal water under low temperature state, which is beneficial to improving the antifreeze performance, and the two ends of the third connecting pipe 63 are respectively connected to the fifth valve port 213 of the first control valve 21 and the first water inlet 11, which can ensure that the water in the water pump 42 is completely discharged, and avoid the freezing of the water pump 42 and the damage caused by the problem.

[0073] In some embodiments of the present invention, at least one of the first control valve 21 and the second control valve 22 is an electric control valve, that is, the first control valve 21 can be an electric control valve, which can realize automatic control of the first control valve 21, avoid problems such as cumbersome maintenance or replacement due to manual adjustment to achieve on and off, and make control more convenient; or, the second control valve 22 can be an electric control valve, which can realize automatic control of the second control valve 22, avoid problems such as cumbersome maintenance or replacement due to manual adjustment to achieve on and off, and make control more convenient; or, the first control valve 21 and the second control valve 22 can both be electric control valves, avoid manual adjustment to achieve on and off to affect the user's experience, and avoid the situation that the user cannot control the first control valve 21 and the second control valve 22 for a long time when traveling far away, or the installation position of the outdoor unit assembly 100 is high-risk and needs to wait for professional personnel to operate, so as to realize timely and automatic emptying of the water in the outdoor unit assembly 100 under low temperature conditions, so that the risk of freezing damage of the outdoor unit assembly 100 is minimized, which can effectively reduce the probability of freezing damage of the outdoor unit assembly 100 at low temperatures, which is conducive to improving the user's experience.

[0074] In some embodiments, the second control valve 22 may be an electric two-way valve, which is a normally closed type, and an external signal is obtained through a power line to realize control of the second control valve 22. When the second control valve 22 is in a powered-on state, the third valve port 221 is connected to the fourth valve port 222, so that the heat exchanger 10 is connected to the water inlet pipeline or the water inlet pipeline; when the second control valve 22 is in a powered-off state, the third valve port 221 is disconnected from the fourth valve port 222, and the outdoor unit assembly 100 can be emptied of the internal water in a low temperature state through the first antifreeze valve 30, which is beneficial to improving the antifreeze performance, and the second control valve 22 has a simple structure, which is beneficial to reducing the production cost of the outdoor unit assembly 100.

[0075] According to some embodiments of the present invention, Figure 2 and Figure 7 As shown, the outdoor unit assembly 100 also includes a shell 41, the heat exchanger 10 is located in the shell 41, and at least one of the first control valve 21, the second control valve 22 and the first antifreeze valve 30 is arranged in the shell 41, that is, the first control valve 21, the second control valve 22 or the first antifreeze valve 30 can be arranged in the shell 41; or, two of the first control valve 21, the second control valve 22 and the first antifreeze valve 30 can be arranged in the shell 41; or, the first control valve 21, the second control valve 22 and the first antifreeze valve 30 can all be arranged in the shell 41, which can avoid hidden dangers such as missing installation during installation, facilitate unified installation of the outdoor unit assembly 100, and help reduce the installation complexity of the outdoor unit assembly 100, making it more reliable.

[0076] In some embodiments where the first antifreeze valve 30 is disposed in the shell 41, a water receiving tray is provided in the shell 41, and the first antifreeze valve 30 is opposite to the water receiving tray, and the first antifreeze valve 30 is located above the water receiving tray, so that the liquid discharged from the first antifreeze valve 30 can be collected by the water receiving tray to prevent the liquid from flowing to the ground, thereby avoiding complaints and other problems, which is conducive to improving the user experience.

[0077] In some embodiments, Figure 2-Figure 7 , Fig.16 and Fig.17 As shown, the outdoor unit assembly 100 also includes a condenser 81, the shell 41 includes a chassis 411, the heat exchanger 10 and the condenser 81 are both arranged on the chassis 411, and the heat exchanger 10 and the condenser 81 can be supported by the chassis 411 to meet the support requirements of the heat exchanger 10 and the condenser 81, and different heat exchange requirements of the outdoor unit assembly 100 can be achieved through the condenser 81 and the heat exchanger 10 to meet different usage requirements of the outdoor unit assembly 100.

[0078] In addition, if Figure 2-Figure 7 , Fig.16 and Fig.17 As shown, a partition 412 is provided on the chassis 411, and the partition 412 extends in the up-down direction. The lower end of the partition 412 is connected to the chassis 411, and the partition 412 is located between the condenser 81 and the heat exchanger 10. The width direction (for example, Figure 3 The condenser 81 and the heat exchanger 10 are connected on one side (in the front-to-back direction shown in the figure), and the partition 412 can separate the condenser 81 and the heat exchanger 10, so as to facilitate the assembly and welding of the internal pipelines of the outdoor unit assembly 100, improve the assembly efficiency, facilitate maintenance, and help to improve the structural strength of the outdoor unit assembly 100.

[0079] In some embodiments, Figure 2-Figure 7 , Fig.16 and Fig.17 As shown, the shell 41 includes a column 414 and a connecting base 413, the connecting base 413 is connected to the chassis 411, the column 414 extends in the up and down direction, and the lower end of the column 414 is connected to the connecting base 413, which can ensure that the connecting base 413 and the column 414 are reliably fixed on the chassis 411, which is beneficial to improve the structural strength of the shell 41, and the heat exchanger 10 is connected to the column 414, which can further ensure that the heat exchanger 10 is reliably fixed on the shell 41 to avoid problems such as movement.

[0080] In addition, if Figure 2-Figure 7 , Fig.16 and Fig.17As shown, the shell 41 also includes a connecting plate 415, and the two ends of the connecting plate 415 in the length direction are respectively connected to the partition 412 and the column 414 to form an integral frame, which is beneficial to improve the structural strength of the shell 41, thereby improving the overall strength of the outdoor unit assembly 100.

[0081] In some embodiments where the outdoor unit assembly 100 includes a water pump 42, such as Figure 2-Figure 7 As shown, the water pump 42 can be fixed on the column 414 by the first bracket 416, ensuring that the water pump 42 is securely fixed on the column 414, thereby ensuring that the water pump 42 is securely fixed in the housing 41 to avoid problems such as movement.

[0082] In some embodiments where the outdoor unit assembly 100 includes an expansion tank 43, such as Figure 2-Figure 7 , Fig.16 and Fig.17 As shown, the expansion tank 43 can be fixed on the partition 412 by the second bracket 417, ensuring that the expansion tank 43 is reliably fixed on the partition 412, thereby ensuring that the expansion tank 43 is reliably fixed in the shell 41 to avoid problems such as movement.

[0083] According to some embodiments of the present invention, the first water inlet 11 can be formed as a water inlet, which is connected to the water inlet pipeline, and the second water inlet 12 can be formed as a water outlet, which is connected to the water outlet pipeline; or, the first water inlet 11 is formed as a water outlet, which is connected to the water outlet pipeline, and the second water inlet 12 is formed as a water inlet, which is connected to the water inlet pipeline, and both can achieve the connection between the heat exchanger 10 and the water inlet pipeline and the water outlet pipeline, ensuring that the liquid flows between the heat exchanger 10 and the water use end, meeting the heat exchange requirements of the liquid.

[0084] In addition, when the first water inlet 11 is formed as a water outlet and the second water inlet 12 is formed as a water inlet, the first antifreeze valve 30 can be located at the water inlet, thereby preventing the internal structure of the first antifreeze valve 30 (such as the temperature sensing device of the first antifreeze valve 30, etc.) from being immersed in high-temperature water for a long time, thereby preventing the first antifreeze valve 30 from failing. This is beneficial to extending the service life of the first antifreeze valve 30.

[0085] In some embodiments of the present invention, the outdoor unit assembly 100 also includes a buffer water tank, which is connected in series between the water inlet and the water inlet pipeline, and can increase the water supply at the water use end, thereby solving problems such as load fluctuations caused by small liquid capacity, which is beneficial to extending the service life and effectively achieving energy saving and power saving.

[0086] In some embodiments, the water pump 42 and the first control valve 21 can be connected by threads to achieve communication between the fourth water port 422 and the first valve port 211, ensuring that the water pump 42 is reliably connected to the first control valve 21, and is easy to disassemble, maintain or replace. For example, the first control valve 21 provided with the first valve port 211 can be provided with an external thread connected to the water pump 42, and the first control valve 21 and the water pump 42 are connected by a union nut, ensuring a reliable connection and facilitating assembly.

[0087] In some embodiments, Figure 2-Figure 7 , Fig.14 and Fig.15 As shown, the third water inlet 421 can be connected to the first water inlet 11 through the second connecting pipe 62, so as to realize the connection between the water pump 42 and the heat exchanger 10, ensure the reliable connection, and make the placement of the water pump 42 and the heat exchanger 10 more flexible.

[0088] In some embodiments, Figure 2-Figure 7 As shown, one end of the third connecting pipe 63 away from the fifth valve port 213 can be connected to the second connecting pipe 62 to achieve communication between the third connecting pipe 63 and the first water port 11, ensuring reliable connection and meeting connection requirements at different positions.

[0089] In some embodiments of the present invention, Figure 2-Figure 7 As shown, the water pump 42 and the first control valve 21 are both located above the heat exchanger 10, making the structure compact and reducing the width of the outdoor unit assembly 100 (for example, Figure 3 The dimensions in the front-to-back direction (as shown in ) are beneficial to reducing the occupied space.

[0090] In addition, if Figure 2-Figure 7 As shown, the fourth water inlet 422 is located at the lower end of the water pump 42, and the fifth valve port 213 is located below the first valve port 211, so that the liquid in the water pump 42 can enter the heat exchanger 10 from the first water inlet 11 through the third connecting pipe 63 from the fourth water inlet 422, the first valve port 211 and the fifth valve port 213 under the action of gravity, avoiding problems such as liquid residue at the fourth water inlet 422, ensuring that the liquid in the water pump 42 is completely discharged, avoiding the risk of freezing of the water pump 42, and helping to extend the service life of the water pump 42.

[0091] It should be noted that, for the convenience of description, the directions such as “front and rear directions” in the present invention are based on the directions shown in the drawings, but are not limitations on the directions in actual application.

[0092] In some embodiments, the third connecting pipe 63 is connected to the fifth valve port 213 by threads, ensuring that the third connecting pipe 63 is reliably connected to the first control valve 21, meeting the requirements of different installation positions, and being easy to disassemble, maintain or replace. For example, the first control valve 21 may be provided with an external thread connected to the third connecting pipe 63 at the fifth valve port 213, and the first control valve 21 and the third connecting pipe 63 are connected by a union nut, ensuring reliable connection and facilitating assembly.

[0093] In some embodiments of the present invention, Figure 5-Figure 7 , Fig.14 and Fig.15 As shown, an air inlet is provided on the second connecting pipe 62, and the air inlet is connected to the air inlet valve 621, so that external gas can enter the heat exchange flow path through the air inlet valve 621 and the air inlet, ensuring that the air pressure in the heat exchange flow path is balanced with the external air pressure, effectively maintaining the internal pressure, ensuring that the stored water in the heat exchange flow path is discharged smoothly, and avoiding the discharge of liquid through the air inlet, thereby ensuring the normal use of the outdoor unit assembly 100.

[0094] Of course, the air inlet may also be arranged on the second control valve 22 . Specifically, the second control valve 22 is provided with an air inlet, which is communicated with the air inlet valve 621 .

[0095] In some embodiments, Figure 5-Figure 7 , Fig.14 and Fig.15 As shown, the air inlet is arranged at the highest point of the second connecting pipe 62, which facilitates the entry of gas through the air inlet and effectively prevents liquid from leaking out of the air inlet, thereby ensuring the normal use of the outdoor unit assembly 100.

[0096] According to some embodiments of the present invention, Figure 14-Figure 20 As shown, the water pump 42 and the heat exchanger 10 are arranged in the horizontal direction, which can ensure a compact structure and effectively reduce the height of the outdoor unit assembly 100 (for example Figure 3 The size of the outdoor unit 100 in the up and down direction as shown in the figure lowers the overall center of gravity of the outdoor unit assembly 100, ensures that the outdoor unit assembly 100 is placed firmly, and helps to reduce the occupied space.

[0097] In some embodiments of the present invention, Figure 16-Figure 19 As shown, the third water inlet 421 is opposite to the first water inlet 11 and is plug-connected, which can ensure that the third water inlet 421 is reliably connected to the first water inlet 11, effectively avoid problems such as water leakage, and avoid low production efficiency caused by welding connection, which is beneficial to improving assembly efficiency. At the same time, it can ensure a compact structure and effectively reduce occupied space.

[0098] In some embodiments, Figure 3-Figure 5As shown, the connection between the water pump 42 and the heat exchanger 10 is connected by a clamping member 80, which ensures that the water pump 42 and the heat exchanger 10 are connected reliably and avoids problems such as movement. For example, the clamping member 80 can be a spring clamp.

[0099] According to some embodiments of the present invention, Figure 2-Figure 7 , Figure 16-Figure 20 As shown, the first control valve 21 also has a sixth valve port 214, and the outdoor unit assembly 100 also includes an expansion tank 43, which is often connected to the sixth valve port 214, and the first valve port 211 is always connected to the sixth valve port 214. When the outdoor unit assembly 100 is powered off, the liquid in the expansion tank 43 can flow into the third connecting pipe 63 through the sixth valve port 214, the first valve port 211 and the fifth valve port 213, and flow through the third connecting pipe 63 from the first water port 11 into the heat exchanger 10, and be discharged through the first antifreeze valve 30 on the first connecting pipe 61, so as to avoid the expansion tank 43 from freezing and causing damage, and so on, so as to realize the outdoor unit assembly 100 to empty the internal water under low temperature state, which is beneficial to improve the antifreeze performance. At the same time, the first control valve 21 can realize the control of multiple flow paths, avoid adding other control structures, and help save installation space and reduce production costs.

[0100] In addition, when the outdoor unit assembly 100 is powered on or off, the expansion tank 43 can work normally, and the expansion tank 43 can ensure that the heat exchange flow path is in a stable pressure range, effectively protect the heat exchange flow path, and ensure smooth liquid flow. At the same time, the first control valve 21 can control multiple flow paths, avoid adding other control structures, and help save installation space and reduce production costs.

[0101] In some embodiments, Figure 2-Figure 7 , Figure 16-Figure 20 As shown, the expansion tank 43 and the sixth valve port 214 can be connected through the fourth connecting pipe 64, and the fourth connecting pipe 64 and the sixth valve port 214 are connected through threads, ensuring that the expansion tank 43 is reliably connected to the first control valve 21, meeting the requirements of different installation positions, and being easy to disassemble, maintain or replace, etc. For example, the first control valve 21 where the sixth valve port 214 is provided can be provided with an external thread connected to the fourth connecting pipe 64, and the first control valve 21 and the fourth connecting pipe 64 are connected through a union nut, ensuring reliable connection and facilitating assembly.

[0102] In some embodiments, the first control valve 21 may be an electric four-way valve, and the electric three-way valve may be a normally closed type with the first valve port 211 and the second valve port 212. The external signal is obtained through the power line to realize the control of the first control valve 21. When the first control valve 21 is in the power-on state, the first valve port 211 is connected with the second valve port 212, so that the heat exchanger 10 is connected with the water outlet pipeline or the water inlet pipeline; when the first control valve 21 is in the power-off state, the first valve port 211, the fifth valve port 213 and the sixth valve port 214 are connected, so that the water stored in the water pump 42 and the expansion tank 43 can be discharged through the first antifreeze valve 30, so that the outdoor unit assembly 100 can empty the internal water stored in the low temperature state, which is conducive to improving the antifreeze performance. In addition, the structure of the first control valve 21 is simple and compact, which can reduce the occupied space and is conducive to reducing the production cost of the outdoor unit assembly 100.

[0103] In some specific embodiments, Figure 8-Figure 13 As shown, the first control valve 21 may include a valve body 217, a valve core 215 and an electric actuator 216. The valve core 215 is rotatably disposed in the valve body 217. The valve body 217 is provided with a first channel 71, a second channel 72, a third channel 73 and a fourth channel 74 that are interconnected. The electric actuator 216 is connected to the valve core 215. The electric actuator 216 is used to drive the valve core 215 to rotate in the valve body 217 so that the first channel 71, the second channel 72, the third channel 73 and the fourth channel 74 can be selectively connected to the first valve port 211, the second valve port 212, the fifth valve port 213 and the sixth valve port 214, so as to realize the control of the first control valve 21 and meet different connection requirements. The first control valve 21 has a simple structure and is easy to process and manufacture, which is conducive to reducing production costs.

[0104] When the outdoor unit assembly 100 is powered on, the third valve port 221 is connected to the fourth valve port 222, and the electric actuator 216 controls the first valve port 211, the second valve port 212 and the sixth valve port 214 to be connected. The liquid in the water inlet pipeline can flow through the fourth valve port 222 and the third valve port 221, and enter the heat exchanger 10 from the second water port 12 through the first connecting pipe 61. The liquid is heat exchanged by the heat exchanger 10. The liquid after heat exchange can flow out of the heat exchanger 10 from the first water port 11, and flow into the water pump 42 from the third water port 421, and flow out of the water pump 42 from the fourth water port 422. A part of the liquid can flow into the water outlet pipeline through the first valve port 211 and the second valve port 212 to meet the required water demand and form a liquid circulation, and another part of the liquid can enter the expansion tank 43 through the first valve port 211 and the sixth valve port 214, so that the expansion tank 43 works normally.

[0105] When the outdoor unit assembly 100 is powered off, the third valve port 221 is disconnected from the fourth valve port 222, the first valve port 211, the fifth valve port 213 and the sixth valve port 214 are connected, and the heat exchange flow path is filled with water. When the first antifreeze valve 30 detects that the water temperature in the first connecting pipe 61 drops to 1°C, the first antifreeze valve 30 automatically opens to drain water. Since the first valve port 211, the fifth valve port 213 and the sixth valve port 214 are interconnected, the liquid in the water pump 42 and the expansion tank 43 can flow into the heat exchanger 10 and be discharged through the first antifreeze valve 30 at the same time as the liquid in the heat exchanger 10, so that the outdoor unit assembly 100 can empty the internal water at a low temperature, which is conducive to improving the antifreeze performance.

[0106] In some embodiments, the outdoor unit assembly 100 also includes a one-way valve 13, which is connected in series between the water outlet pipe and the second valve port 212. The one-way valve 13 prevents the liquid in the water outlet pipe from flowing back into the heat exchange flow path through the non-return function, thereby effectively preventing the liquid from flowing back and ensuring the normal operation of the outdoor unit assembly 100.

[0107] In some embodiments of the present invention, Fig.14 and Fig.15 As shown, the outdoor unit assembly 100 also includes a connecting branch 50, which extends in the up and down directions, and the connecting branch 50 connects the first water inlet 11 and the second water inlet 12. Therefore, the first water inlet 11 and the second water inlet 12 can be connected through the connecting branch 50, which effectively reduces the flow path of the liquid, facilitates the liquid to flow directly through the connecting branch 50 to the first antifreeze valve 30 to realize the discharge of the liquid, effectively prevents the liquid from being retained in the outdoor unit assembly 100, ensures that the outdoor unit assembly 100 empties the internal water, and is beneficial to improving the antifreeze performance.

[0108] In addition, if Fig.14 and Fig.15 As shown, a second antifreeze valve 51 is provided on the connecting branch 50, and the second antifreeze valve 51 is used to control the connecting branch 50 to meet the working requirements of the outdoor unit assembly 100. When the outdoor unit assembly 100 is powered on, the second antifreeze valve 51 controls the connecting branch 50 to be disconnected, so as to avoid problems such as mixed flow of liquid when the outdoor unit assembly 100 is working, thereby ensuring the working efficiency of the outdoor unit assembly 100; when the outdoor unit assembly 100 is powered off, the second antifreeze valve 51 controls the connecting branch 50 to be connected, so that the liquid can flow to the second water inlet 12 through the connecting branch 50, thereby realizing the discharge of the stored water.

[0109] The control method of the air source heat pump unit according to the embodiment of the present invention includes the outdoor unit assembly 100 according to the embodiment of the present invention. The control method of the air source heat pump unit includes:

[0110] When the air source heat pump unit is shut down or powered off, the second control valve 22 is controlled to be closed, the first valve port 211 is controlled to be connected to the fifth valve port 213, and the first antifreeze valve 30 is controlled to be closed, that is, the heat exchanger 10 is disconnected from the water inlet and outlet pipes, and the first antifreeze valve 30 is connected to the second water port 12;

[0111] Acquiring the ambient temperature, which includes the outdoor ambient temperature and / or the water temperature passing through the first connecting pipe 61. For example, the outdoor ambient temperature and / or the water temperature passing through the first connecting pipe 61 can be detected by a temperature sensing device of the first antifreeze valve 30;

[0112] When the ambient temperature is lower than the preset temperature, the first antifreeze valve 30 opens, whereby the liquid in the heat exchanger 10 is discharged from the first antifreeze valve 30 under the action of gravity, so that the outdoor unit assembly 100 can empty the internal water at a low temperature, which is beneficial to improving the antifreeze performance.

[0113] In some embodiments, the specific value of the preset temperature can be set according to actual conditions, for example, the preset temperature can be set before leaving the factory or set by the user. In some specific embodiments, the preset temperature can be 1°C, 2°C, 3°C, 4°C, 5°C, etc.

[0114] In some embodiments, the first antifreeze valve 30 can be a mechanical antifreeze valve. The first antifreeze valve 30 is in a normally closed state. When the outdoor unit assembly 100 is powered off and the ambient temperature is lower than a preset temperature, the first antifreeze valve 30 can be automatically opened to drain water, thereby avoiding the influence of power failure on the operation of the first antifreeze valve 30 and helping to reduce the production cost of the outdoor unit assembly 100; or the first antifreeze valve 30 can be opened and closed by controlling the first antifreeze valve 30, thereby meeting different usage requirements.

[0115] In some embodiments in which a second antifreeze valve 51 is provided on the connecting branch 50, the control method of the air source heat pump unit further includes:

[0116] When the air source heat pump unit is shut down or powered off, the second antifreeze valve 51 is controlled to be closed;

[0117] Acquiring the ambient temperature, which includes the outdoor ambient temperature and / or the water temperature passing through the connecting branch 50. For example, the outdoor ambient temperature and / or the water temperature passing through the connecting branch 50 can be detected by a temperature sensing device of the second antifreeze valve 51;

[0118] When the ambient temperature is lower than the preset temperature, the second antifreeze valve 51 opens, thereby connecting the first water inlet 11 and the second water inlet 12, so that the outdoor unit assembly 100 can drain the internal water under low temperature conditions, which is beneficial to improving the antifreeze performance.

[0119] Since the outdoor unit assembly 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the air source heat pump unit according to the embodiment of the present invention is connected to the first water inlet 11 of the heat exchanger 10 through the third water inlet 421 of the water pump 42, the fourth water inlet 422 of the water pump 42 is connected to the first valve port 211 of the first control valve 21, the second water inlet 12 of the heat exchanger 10 is connected to the third valve port 221 of the second control valve 22 through the first connecting pipe 61, and the first connecting pipe 61 is provided with a first antifreeze valve 30. When the first antifreeze valve 30 is opened, the liquid in the heat exchanger 10 is discharged from the first antifreeze valve 30 through the first connecting pipe 61, so that the outdoor unit assembly 100 can empty the internal water under low temperature state, which is beneficial to improving the antifreeze performance, and the two ends of the third connecting pipe 63 are respectively connected to the fifth valve port 213 of the first control valve 21 and the first water inlet 11, which can ensure that the water in the water pump 42 is completely discharged, and avoid the freezing of the water pump 42 and the damage caused by the problem.

[0120] In some embodiments, the first antifreeze valve 30 is a mechanical antifreeze valve. When the outdoor unit assembly 100 is powered off, the first antifreeze valve 30 can perform drainage work, thereby avoiding the impact of power outage on the operation of the first antifreeze valve 30 and helping to reduce the production cost of the outdoor unit assembly 100.

[0121] In some embodiments of the present invention, when the ambient temperature is lower than a preset temperature, the first antifreeze valve 30 is opened, including:

[0122] When the ambient temperature drops to a first temperature range, the first antifreeze valve 30 is opened to a first opening, so that the stored water can slowly flow out of the first antifreeze valve 30, which is convenient for subsequent drainage, and the outdoor unit assembly 100 can be quickly heated after being turned on, which is beneficial to improving the startup efficiency;

[0123] When the ambient temperature drops to the second temperature range, the first antifreeze valve 30 opens to the second opening, so that the stored water can quickly flow out of the first antifreeze valve 30, ensuring that the stored water is completely drained before freezing, and can achieve automatic drainage, completely eliminating hidden dangers such as freezing damage;

[0124] The minimum temperature in the first temperature range is greater than the maximum temperature in the second temperature range, and the first opening degree is smaller than the second opening degree.

[0125] In some embodiments, when the first antifreeze valve 30 is opened to a first opening degree, the first antifreeze valve 30 is in a half-open state, and when the first antifreeze valve 30 is opened to a second opening degree, the first antifreeze valve 30 is in a fully open state, which facilitates the control of the first antifreeze valve 30 and can meet the required requirements.

[0126] Other structures and operations of the outdoor unit assembly 100, the air source heat pump unit and the control method of the air source heat pump unit according to the embodiment of the present invention are known to ordinary technicians in the field and will not be described in detail here.

[0127] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0128] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0129] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An outdoor unit assembly, characterized in that: include: A heat exchanger, wherein the heat exchanger has a heat exchange flow path, and the heat exchanger has a first water inlet and a second water inlet communicated with the heat exchange flow path; a first control valve, the first control valve having a first valve port and a second valve port, the first valve port being connected to the first water port, and the first valve port being selectively connected to or disconnected from the second valve port; a second control valve, wherein the second control valve has a third valve port and a fourth valve port, the third valve port is connected to the second water port through a first connecting pipe, the third valve port can be selectively connected to or disconnected from the fourth valve port, one of the second valve port and the fourth valve port is connected to a water inlet pipeline, and the other is connected to a water outlet pipeline, the first connecting pipe is provided with a first antifreeze valve, when the first antifreeze valve is opened, the liquid in the heat exchanger is discharged from the first antifreeze valve; A water pump, the water pump having a third water inlet and a fourth water inlet, the third water inlet being located above the fourth water inlet, the third water inlet being communicated with the first water inlet, and the fourth water inlet being communicated with the first valve port, so as to drive the liquid to flow between the heat exchanger and the water use end; The third connecting pipe, the first control valve also has a fifth valve port, both ends of the third connecting pipe are respectively connected with the fifth valve port and the first water port, and the first valve port can be selectively connected with the fifth valve port.

2. The outdoor unit assembly according to claim 1, characterized in that: The first water inlet is formed as a water inlet, the water inlet is communicated with the water inlet pipeline, and the second water inlet is formed as a water outlet, the water outlet is communicated with the water outlet pipeline; Alternatively, the first water inlet is formed as a water outlet, the water outlet is communicated with the water outlet pipeline, and the second water inlet is formed as a water inlet, the water inlet is communicated with the water inlet pipeline.

3. The outdoor unit assembly according to claim 2, characterized in that: The outdoor unit assembly further comprises: A buffer water tank is connected in series between the water inlet and the water inlet pipeline.

4. The outdoor unit assembly according to claim 1, characterized in that: The outdoor unit assembly further comprises: A shell, the heat exchanger is located in the shell, and at least one of the first control valve, the second control valve and the first antifreeze valve is arranged in the shell.

5. The outdoor unit assembly according to claim 1, characterized in that: The third water inlet is connected to the first water inlet through a second connecting pipe.

6. The outdoor unit assembly according to claim 1, characterized in that: The water pump and the first control valve are both located above the heat exchanger, the fourth water port is located at the lower end of the water pump, and the fifth valve port is located below the first valve port.

7. The outdoor unit assembly according to claim 1, characterized in that: The water pump and the heat exchanger are arranged in a horizontal direction.

8. The outdoor unit assembly according to claim 1, characterized in that: The first control valve further has a sixth valve port, and the outdoor unit assembly further includes: An expansion tank, wherein the expansion tank is always connected to the sixth valve port, and the first valve port is always connected to the sixth valve port.

9. The outdoor unit assembly according to claim 1, characterized in that: The outdoor unit assembly further comprises: A connecting branch extends in the up-down direction and connects the first water inlet and the second water inlet. A second antifreeze valve for controlling the opening and closing of the connecting branch is provided on the connecting branch.

10. An air source heat pump unit, characterized in that: It comprises an outdoor unit assembly and a water use terminal according to any one of claims 1 to 9, wherein the outdoor unit assembly and the water use terminal are connected through the water inlet pipe and the water outlet pipe.

11. A control method for an air source heat pump unit, characterized in that: Comprising an outdoor unit assembly according to any one of claims 1 to 9, the control method of the air source heat pump unit comprises: When the air source heat pump unit is shut down or powered off, the second control valve is controlled to be closed, the first valve port is controlled to be connected to the fifth valve port, and the first antifreeze valve is controlled to be closed; Acquiring an ambient temperature, wherein the ambient temperature includes an outdoor ambient temperature and / or a water temperature passing through the first connecting pipe; When the ambient temperature is lower than a preset temperature, the first antifreeze valve opens.

12. The control method of the air source heat pump unit according to claim 11, characterized in that: When the ambient temperature is lower than a preset temperature, the first antifreeze valve is opened, comprising: When the ambient temperature drops to a first temperature range, the first antifreeze valve opens to a first opening degree; When the ambient temperature drops to a second temperature range, the first antifreeze valve opens to a second opening degree; The minimum temperature in the first temperature range is greater than the maximum temperature in the second temperature range, and the first opening degree is smaller than the second opening degree.

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