Heat pump device, air conditioning system and control method of heat pump device

Abstract

The invention discloses a heat pump device, an air conditioning system and a control method of the heat pump device, and relates to the technical field of heat exchange. The air conditioner comprises an outdoor assembly, an inner unit assembly, a liquid inlet valve set and a liquid outlet valve set. The liquid inlet of each outdoor assembly is communicated with the first liquid outlet of the inner unit assembly, and the liquid outlet of each outdoor assembly is communicated with the first liquid inlet of the inner unit assembly. And the liquid inlet valve group is communicated with the second liquid outlet of the inner machine assembly and the liquid inlet of each outdoor assembly. And the liquid outlet valve group is communicated with the second liquid inlet of the inner machine assembly and the liquid outlet of each outdoor assembly. Therefore, the conduction state of the liquid inlet valve set and the liquid outlet valve set can be adjusted through the refrigerating or heating mode of the indoor unit, and the function of independent refrigerating, independent heating or simultaneous refrigerating and heating in multiple areas can be achieved on the basis that a heat recovery module does not need to be additionally arranged. Therefore, the structural complexity of the heat pump device is reduced, and the product adaptability of the heat pump device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and in particular to a heat pump device, an air conditioning system and a control method for the heat pump device. Background Art

[0002] Ordinary heat pump modules can only operate in cooling mode or heating mode. In order to meet the needs of simultaneous cooling and heating in different rooms, heat recovery modules are usually required. Compared with ordinary heat pump modules, heat recovery modules have an additional heat exchanger, so that while operating in cooling mode, the waste heat lost to the air can be recovered through the heat exchanger for domestic water or heating.

[0003] However, when the heating load of the heat pump module is unstable, the heat recovery module may switch to a water-cooled or air-cooled heat exchanger operating in cooling mode, resulting in high structural complexity of the heat recovery module and low product applicability. Summary of the invention

[0004] In view of the problems of high structural complexity and low product applicability of current heat recovery modules, the present invention is proposed to provide a heat pump device, an air conditioning system and a control method for a heat pump device that overcome the above problems or at least partially solve the above problems.

[0005] According to a first aspect of the present invention, a heat pump device is provided, the heat pump device comprising:

[0006] At least two outdoor components;

[0007] An indoor unit assembly, wherein the indoor unit assembly comprises at least two indoor units, wherein the liquid inlet of each outdoor unit is communicated with the first liquid outlet of the indoor unit assembly, and the liquid outlet of each outdoor unit is communicated with the first liquid inlet of the indoor unit assembly;

[0008] A liquid inlet valve group, wherein the liquid inlet valve group is connected with the second liquid outlet of the indoor unit and the liquid inlet of each outdoor unit, so as to adjust the liquid path connection state of the liquid inlet of the outdoor unit through the liquid inlet valve group;

[0009] A liquid outlet valve group is connected with the second liquid inlet of the indoor unit and the liquid outlet of each outdoor unit to adjust the liquid path connection state of the liquid outlet of the outdoor unit through the liquid outlet valve group.

[0010] An optional invention content, the liquid inlet valve group includes at least two liquid inlet three-way valves, wherein the number of the liquid inlet three-way valves is the same as the number of the outdoor components.

[0011] An optional invention content, the liquid inlet of each outdoor component is connected to the first end of each liquid inlet three-way valve, the first liquid outlet is connected to the second end of each liquid inlet three-way valve, and the second liquid outlet is connected to the third end of each liquid inlet three-way valve.

[0012] An optional invention content, the liquid inlet three-way valve is an electric three-way valve, and the heat pump device also includes a controller, which is electrically connected to the liquid inlet three-way valve to adjust the liquid path conduction state of the liquid inlet three-way valve through the controller.

[0013] An optional invention content, the liquid outlet valve group includes at least two liquid outlet three-way valves, wherein the number of the liquid outlet three-way valves is the same as the number of the outdoor components.

[0014] An optional invention content, the liquid outlet of each outdoor component is connected to the first end of each liquid outlet three-way valve, the first liquid inlet is connected to the second end of each liquid outlet three-way valve, and the second liquid inlet is connected to the third end of each liquid outlet three-way valve.

[0015] An optional invention content, the liquid outlet three-way valve is an electric three-way valve, and the heat pump device also includes a controller, which is electrically connected to the liquid outlet three-way valve to adjust the liquid path conduction state of the liquid outlet three-way valve through the controller.

[0016] An optional invention content, the liquid inlet valve group and the liquid outlet valve group both adopt electric three-way valves, the heat pump device also includes a controller, the liquid inlet valve group, the liquid outlet valve group, the indoor unit component and the outdoor component are respectively electrically connected to the controller to control the liquid path connection state between the indoor unit component and the outdoor component through the controller.

[0017] According to an optional aspect of the invention, the outdoor component includes at least one outdoor unit.

[0018] Based on the second aspect of the present invention, an air-conditioning system is further provided, the air-conditioning system comprising a heat pump device as described in any one of the above invention contents.

[0019] Based on the third aspect of the present invention, a control method of a heat pump device is further provided, wherein the heat pump device comprises the heat pump device according to any one of the above invention contents, and the control method comprises:

[0020] Obtain the number of units in operation of the current indoor unit of the indoor unit component and the unit operation mode of each indoor unit;

[0021] Determining a target operation mode of the heat pump device according to the number of units in operation and the unit operation mode;

[0022] The liquid inlet valve group and the liquid outlet valve group are adjusted according to the target operation mode, and the outdoor component is started to work.

[0023] An optional invention content, determining the target operation mode of the heat pump device according to the number of units in operation and the unit operation mode, includes:

[0024] When the unit operation modes of all the running indoor units are heating mode, determining the target operation mode of the heat pump device to be full heating mode;

[0025] When the unit operation modes of all the running indoor units are in cooling mode, determining the target operation mode of the heat pump device to be a full cooling mode;

[0026] When the unit operation mode of the first operating number of indoor units is a heating mode, and the unit operation mode of the second operating number of indoor units is a cooling mode, determining the target operation mode of the heat pump device to be a mixed operation mode;

[0027] In an optional embodiment of the invention, the method further comprises:

[0028] In the case where it is detected that the outdoor component is in the shutdown mode, detecting the outdoor environment temperature of the outdoor component according to the temperature sensor;

[0029] When the outdoor ambient temperature is lower than a first temperature threshold, the outdoor component in the shutdown mode is switched to the heating mode.

[0030] Compared with the prior art, the present invention includes at least two outdoor components, an indoor component, a liquid inlet valve group and a liquid outlet valve group. The indoor component includes at least two indoor units, wherein the liquid inlet of each outdoor component is communicated with the first liquid outlet of the indoor component, and the liquid outlet of each outdoor component is communicated with the first liquid inlet of the indoor component. The liquid inlet valve group is communicated with the second liquid outlet of the indoor component and the liquid inlet of each outdoor component, so as to adjust the liquid path communication state of the liquid inlet of the outdoor component through the liquid inlet valve group. The liquid outlet valve group is communicated with the second liquid inlet of the indoor component and the liquid outlet of each outdoor component, so as to adjust the liquid path communication state of the liquid outlet of the outdoor component through the liquid outlet valve group. Thus, the conduction state of the liquid inlet valve group and the liquid outlet valve group can be adjusted by the cooling or heating mode of the indoor unit, and the functions of independent cooling, independent heating or simultaneous cooling and heating in multiple areas can be realized without adding a heat recovery module. Thereby, the structural complexity of the heat pump device is reduced and the product adaptability of the heat pump device is improved.

[0031] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0033] In the attached picture:

[0034] Figure 1 is a schematic structural diagram of a heat pump device provided by an embodiment of the present invention;

[0035] Figure 2 It is a schematic flow chart of the steps of a control method of a heat pump device provided by an embodiment of the present invention;

[0036] Figure 3 is a schematic diagram of water circulation in a full heating mode of a heat pump device provided by an embodiment of the present invention;

[0037] Figure 4 is a schematic diagram of water circulation in a heat pump device in a full cooling mode provided by an embodiment of the present invention;

[0038] Figure 5 is a schematic diagram of water circulation in a hybrid operation mode of a heat pump device provided by an embodiment of the present invention;

[0039] Figure 6 is a structural schematic diagram of an internal machine component provided by an embodiment of the present invention;

[0040] Figure numerals: 1. outdoor component; 2. indoor unit component; 21. indoor unit; 22. first liquid inlet valve; 23. second liquid inlet valve; 201. first liquid outlet; 202. first liquid inlet; 203. second liquid outlet; 204. second liquid inlet; 3. liquid inlet valve group; 31. liquid inlet three-way valve; 4. liquid outlet valve group; 41. liquid outlet three-way valve; 5. controller; 6. hot water pump; 7. refrigeration water pump. DETAILED DESCRIPTION

[0041] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0042] Ordinary heat pump modules can only operate in cooling mode or heating mode. In order to meet the needs of simultaneous cooling and heating in different rooms, heat recovery modules are usually required. Compared with ordinary heat pump modules, heat recovery modules have an additional heat exchanger, so that while operating in cooling mode, the waste heat lost to the air can be recovered through the heat exchanger for domestic water or heating.

[0043] However, when the heating load of the heat pump module is unstable, the heat recovery module may switch to a water-cooled or air-cooled heat exchanger operating in cooling mode, resulting in high structural complexity of the heat recovery module and low product applicability.

[0044] Based on the above technical problems, an embodiment of the present invention is proposed, which may include at least two outdoor components 1, an indoor component 2, a liquid inlet valve group 3 and a liquid outlet valve group 4. The indoor component 2 includes at least two indoor units 21, wherein the liquid inlet of each outdoor component 1 is connected to the first liquid outlet 201 of the indoor component 2, and the liquid outlet of each outdoor component 1 is connected to the first liquid inlet 202 of the indoor component 2. The liquid inlet valve group 3 is connected to the second liquid outlet 203 of the indoor component 2 and the liquid inlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid inlet of the outdoor component 1 through the liquid inlet valve group 3. The liquid outlet valve group 4 is connected to the second liquid inlet 204 of the indoor component 2 and the liquid outlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid outlet of the outdoor component 1 through the liquid outlet valve group 4. Therefore, the conduction state of the liquid inlet valve group 3 and the liquid outlet valve group 4 can be adjusted by the cooling or heating mode of the indoor unit 21, and the functions of independent cooling, independent heating or simultaneous cooling and heating can be realized in multiple areas without adding a heat recovery module. Thus, the structural complexity of the heat pump device is reduced and the product adaptability of the heat pump device is improved.

[0045] Reference Figure 1-6 The embodiment of the present invention provides a heat pump device, which may include at least two outdoor components 1, an indoor component 2, a liquid inlet valve group 3 and a liquid outlet valve group 4, wherein:

[0046] The indoor unit assembly 2 includes at least two indoor units 21, wherein the liquid inlet of each outdoor unit 1 is communicated with the first liquid outlet 201 of the indoor unit assembly 2, and the liquid outlet of each outdoor unit 1 is communicated with the first liquid inlet 202 of the indoor unit assembly 2. The liquid inlet valve group 3 is communicated with the second liquid outlet 203 of the indoor unit assembly 2 and the liquid inlet of each outdoor unit 1, so as to adjust the liquid path communication state of the liquid inlet of the outdoor unit 1 through the liquid inlet valve group 3. The liquid outlet valve group 4 is communicated with the second liquid inlet 204 of the indoor unit assembly 2 and the liquid outlet of each outdoor unit 1, so as to adjust the liquid path communication state of the liquid outlet of the outdoor unit 1 through the liquid outlet valve group 4.

[0047] In an embodiment of the present invention, the outdoor component 1 is used to heat or cool the circulating water. For example, when operating in a cooling mode, the outdoor component 1 is used to cool the circulating water. Thus, low-temperature circulating water (for example, between 5 and 10 degrees Celsius) can be sent into the indoor unit 21 to exchange heat with the indoor air, thereby achieving cooling of the indoor environment. When operating in a heating mode, the outdoor component 1 is used to heat up the circulating water, so that high-temperature circulating water (for example, between 40 and 60 degrees Celsius) can be sent into the indoor unit 21 to exchange heat with the indoor air, thereby achieving heating in the indoor environment.

[0048] The indoor unit assembly 2 may include at least two indoor units 21. For example, at least one indoor unit 21 may be provided in each of the indoor environments separated from each other, so that the temperature of each indoor environment can be controlled. Figure 6 As shown, the first liquid inlets 202 of all indoor units 21 form a liquid circuit connection and serve as the first liquid inlet 202 of the indoor unit assembly 2. The second liquid inlets 204 of all indoor units 21 form a liquid circuit connection and serve as the second liquid inlet 204 of the indoor unit assembly 2. The first liquid outlets 201 of all indoor units 21 form a liquid circuit connection and serve as the first liquid outlet 201 of the indoor unit assembly 2. The second liquid outlets 203 of all indoor units 21 form a liquid circuit connection and serve as the second liquid outlet 203 of the indoor unit assembly 2. In addition, the indoor unit assembly 2 further includes at least two first liquid inlet valves 22 and at least two second liquid inlet valves 23. The first liquid inlet valve 22 and the second liquid inlet valve 23 are used to control the circulating water flowing into the indoor unit 21. For example, when the indoor unit 21 operates in the heating mode, the first liquid inlet valve 22 of the corresponding indoor unit 21 is opened, and the second liquid inlet valve 23 is closed, so that the high-temperature circulating water enters the indoor unit 21. For another example, when the indoor unit 21 operates in cooling mode, the first liquid inlet valve 22 corresponding to the indoor unit 21 is closed, and the second liquid inlet valve 23 is opened, so that low-temperature circulating water enters the indoor unit 21 .

[0049] The liquid inlet of each outdoor component 1 is connected to the first liquid outlet 201 of the indoor component 2, and the liquid outlet of each outdoor component 1 is connected to the first liquid inlet 202 of the indoor component 2. The first liquid outlet 201 can be understood as the liquid outlet of high-temperature circulating water. The first liquid inlet 202 can be understood as the liquid inlet of high-temperature circulating water. The second liquid outlet 203 can be understood as the liquid outlet of low-temperature circulating water, and the second liquid inlet 204 can be understood as the liquid inlet of low-temperature circulating water. The liquid inlet valve group 3 can include at least two valves. The liquid outlet valve group 4 can include at least two valves.

[0050] The inlet valve group 3 is connected with the second liquid outlet 203 of the indoor unit 2 and the liquid inlet of each outdoor unit 1, so that the liquid inlet valve group 3 can be used to adjust the liquid path connection state of the liquid inlet of the outdoor unit 1. That is, through the inlet valve group 3, it can be used to control whether the water entering the outdoor unit 1 is low-temperature circulating water or high-temperature circulating water, and the outlet valve group 4 is connected with the second liquid inlet 204 of the indoor unit 2 and the liquid outlet of each outdoor unit 1, so that the liquid path connection state of the liquid outlet of the outdoor unit 1 can be adjusted through the outlet valve group 4. That is, through the outlet valve group 4, it can be used to control whether the water entering the indoor unit 21 is low-temperature circulating water or high-temperature circulating water. Therefore, the conduction state of the inlet valve group 3 and the outlet valve group 4 can be adjusted according to the cooling or heating mode of the indoor unit 21, and the functions of independent cooling, independent heating or simultaneous cooling and heating in multiple areas can be realized. As a result, the structural complexity of the heat pump device is reduced, and the product adaptability of the heat pump device is improved.

[0051] In summary, the embodiment of the present invention discloses a heat pump device, which may include at least two outdoor components 1, an indoor component 2, a liquid inlet valve group 3 and a liquid outlet valve group 4. The indoor component 2 includes at least two indoor units 21, wherein the liquid inlet of each outdoor component 1 is connected to the first liquid outlet 201 of the indoor component 2, and the liquid outlet of each outdoor component 1 is connected to the first liquid inlet 202 of the indoor component 2. The liquid inlet valve group 3 is connected to the second liquid outlet 203 of the indoor component 2 and the liquid inlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid inlet of the outdoor component 1 through the liquid inlet valve group 3. The liquid outlet valve group 4 is connected to the second liquid inlet 204 of the indoor component 2 and the liquid outlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid outlet of the outdoor component 1 through the liquid outlet valve group 4. Therefore, the conduction state of the liquid inlet valve group 3 and the liquid outlet valve group 4 can be adjusted by the cooling or heating mode of the indoor unit 21, and the functions of independent cooling, independent heating or simultaneous cooling and heating can be realized in multiple areas without adding a heat recovery module. Thus, the structural complexity of the heat pump device is reduced and the product adaptability of the heat pump device is improved.

[0052] In an optional embodiment of the invention, referring to Figure 1 , Figure 3 , Figure 4 as well as Figure 5 As shown, the liquid inlet valve group 3 includes at least two liquid inlet three-way valves 31 , wherein the number of the liquid inlet three-way valves 31 is the same as the number of the outdoor components 1 .

[0053] In the embodiment of the present invention, the liquid inlet valve group 3 may include at least two liquid inlet three-way valves 31, and the number of the liquid inlet three-way valves 31 is consistent with the number of the outdoor unit 1. Therefore, the liquid inlet of the outdoor unit 1 can be adjusted to form a liquid path connection with the first liquid outlet 201 of the indoor unit 21 through each liquid inlet three-way valve 31. Alternatively, the liquid inlet of the outdoor unit 1 can be adjusted to form a liquid path connection with the second liquid outlet 203 of the indoor unit 21.

[0054] In some embodiments, the liquid inlet of each outdoor component 1 is connected to the first end of each liquid inlet three-way valve 31, and the first liquid outlet 201 is connected to the second end of each liquid inlet three-way valve 31. And the second liquid outlet 203 is connected to the third end of each liquid inlet three-way valve 31. In other words, when the valve core of the liquid inlet three-way valve 31 rotates a certain angle, the first end of the liquid inlet three-way valve 31 is connected to the second end of the liquid inlet three-way valve 31 to form a liquid path, and at this time, the liquid inlet of the outdoor component 1 is connected to the first liquid outlet 201. Thereby, the high-temperature circulating water can be refluxed to the outdoor component 1. The liquid inlet three-way valve 31 rotates a certain angle again, and the first end of the liquid inlet three-way valve 31 is connected to the third end of the liquid inlet three-way valve 31 to form a liquid path, and at this time, the liquid inlet of the outdoor component 1 is connected to the second liquid outlet 203. Thereby, the low-temperature circulating water can be refluxed to the outdoor component 1. The pipeline connecting the liquid inlet of each outdoor component 1 and the first liquid outlet 201 can be partially shared, that is, the connection is formed by the combination of the main pipeline and the branch pipeline. The pipeline connecting the liquid inlet of each outdoor component 1 and the second liquid outlet 203 can also be partially shared, thereby reducing the complexity of the pipeline of the heat pump device.

[0055] In an optional embodiment of the invention, referring to Figure 1 As shown, the liquid inlet three-way valve 31 is an electric three-way valve, and the heat pump device also includes a controller 5, which is electrically connected to the liquid inlet three-way valve 31 to adjust the liquid path conduction state of the liquid inlet three-way valve 31 through the controller 5.

[0056] In the embodiment of the present invention, the liquid inlet three-way valve 31 is an electric three-way valve, and the heat pump device may further include a controller 5, which is electrically connected to the liquid inlet three-way valve 31. Thus, the liquid inlet valve group 3 may be electrically driven by the controller 5 to adjust the liquid path conduction state of the liquid inlet three-way valve 31, thereby improving the control convenience of the heat pump device.

[0057] In an optional embodiment of the invention, referring to Figure 1 , Figure 3 , Figure 4 as well as Figure 5 As shown, the liquid outlet valve group 4 includes at least two liquid outlet three-way valves 41 , wherein the number of the liquid outlet three-way valves 41 is the same as the number of the outdoor components 1 .

[0058] In the embodiment of the present invention, the liquid inlet valve group 3 may include at least two liquid outlet three-way valves 41, and the number of the liquid outlet three-way valves 41 is consistent with the number of the outdoor component 1. Therefore, each liquid outlet three-way valve 41 can be used to adjust the liquid outlet of the outdoor component 1 and the first liquid inlet 202 of the indoor unit 21 to form a liquid path connection. Alternatively, the liquid outlet of the outdoor component 1 is adjusted to form a liquid path connection with the second liquid inlet 204 of the indoor unit 21. Therefore, the conduction state of the liquid outlet valve group 4 can be used to control the circulating water of different temperatures to enter the first liquid inlet 202 (liquid inlet of high-temperature circulating water) or the second liquid inlet 204 (liquid inlet of low-temperature circulating water) of the indoor unit 21.

[0059] In some embodiments, the liquid outlet of each outdoor assembly 1 is connected to the first end of each liquid outlet three-way valve 41, and the first liquid inlet 202 is connected to the second end of each liquid outlet three-way valve 41. And the second liquid inlet 204 is connected to the third end of each liquid outlet three-way valve 41. In other words, when the valve core of the liquid outlet three-way valve 41 rotates a certain angle, the first end of the liquid outlet three-way valve 41 is connected to the second end of the liquid outlet three-way valve 41 to form a liquid path, and at this time, the liquid outlet of the outdoor assembly 1 is connected to the first liquid inlet 202. Thus, high-temperature circulating water can flow to the indoor unit 21 in the heating mode. The liquid outlet three-way valve 41 rotates a certain angle again, and the first end of the liquid outlet three-way valve 41 is connected to the third end of the liquid outlet three-way valve 41 to form a liquid path, and at this time, the liquid outlet of the outdoor assembly 1 is connected to the second liquid inlet 204. Thus, low-temperature circulating water can flow to the indoor unit 21 in the cooling mode. The pipeline connecting the liquid outlet of each outdoor component 1 and the first liquid inlet 202 can be partially shared, that is, the connection is formed by the combination of the main pipeline and the branch pipeline. The pipeline connecting the liquid outlet of each outdoor component 1 and the second liquid inlet 204 can also be partially shared, thereby reducing the complexity of the pipeline of the heat pump device.

[0060] In an optional embodiment of the invention, the liquid outlet three-way valve 41 is an electric three-way valve, and the heat pump device also includes a controller 5, which is electrically connected to the liquid outlet three-way valve 41 to adjust the liquid path conduction state of the liquid outlet three-way valve 41 through the controller 5.

[0061] In the embodiment of the present invention, the liquid outlet three-way valve 41 is an electric three-way valve, and the heat pump device may further include a controller 5, which is electrically connected to the liquid outlet three-way valve 41. Thus, the liquid outlet valve group 4 can be electrically driven by the controller 5 to adjust the liquid path conduction state of the liquid outlet three-way valve 41, thereby improving the control convenience of the heat pump device.

[0062] In an optional embodiment of the invention, referring to Figure 1 , Figure 3 , Figure 4 as well as Figure 5 As shown, the liquid inlet valve group 3 and the liquid outlet valve group 4 both adopt electric three-way valves, and the heat pump device also includes a controller 5. The liquid inlet valve group 3, the liquid outlet valve group 4, the indoor unit component 2 and the outdoor component 1 are electrically connected to the controller 5 respectively, so as to control the liquid path connection state between the indoor unit component 2 and the outdoor component 1 through the controller 5.

[0063] In the embodiment of the present invention, the liquid inlet valve group 3 and the liquid outlet valve group 4 are both electric three-way valves, so that the liquid inlet valve group 3 and the liquid outlet valve group 4 can be electrically driven, thereby improving the control convenience of the heat pump device.

[0064] The liquid inlet valve group 3, the liquid outlet valve group 4, the indoor unit assembly 2 and the outdoor unit 1 are electrically connected to the controller 5, respectively, so as to control the liquid path connection state between the indoor unit assembly 2 and the outdoor unit 1 through the controller 5. Thus, when the indoor units 21 are all operating in the cooling mode, the controller 5 controls the liquid inlet valve group 3 to operate so that the second liquid outlet 203 forms a liquid path connection with the liquid inlet of the outdoor unit 1. The liquid outlet valve group 4 is controlled to operate so that the second liquid inlet 204 forms a liquid path connection with the liquid outlet of the outdoor unit 1, thereby realizing the refrigeration cycle of the indoor unit 21 and the outdoor unit 1.

[0065] The first liquid inlet valve 22 and the second liquid inlet valve 23 are respectively electrically connected to the controller 5, so as to control the circulating water flowing into the indoor unit 21. For example, when the indoor unit 21 operates in a heating mode, the first liquid inlet valve 22 corresponding to the indoor unit 21 is opened, and the second liquid inlet valve 23 is closed, so that high-temperature circulating water enters the indoor unit 21. For another example, when the indoor unit 21 operates in a cooling mode, the first liquid inlet valve 22 corresponding to the indoor unit 21 is closed, and the second liquid inlet valve 23 is opened, so that low-temperature circulating water enters the indoor unit 21.

[0066] In other embodiments, when the indoor units 21 are all operated in the heating mode, the controller 5 controls the liquid inlet valve group 3 to operate so that the first liquid outlet 201 is in liquid communication with the liquid inlet of the outdoor component 1. The liquid outlet valve group 4 is controlled to operate so that the second liquid inlet 204 is in liquid communication with the liquid outlet of the outdoor component 1, thereby realizing the refrigeration cycle of the indoor unit 21 and the outdoor component 1.

[0067] In some other embodiments, when at least one indoor unit 21 is operated in the heating mode and at least one indoor unit 21 is operated in the cooling mode, the controller 5 controls the liquid inlet valve group 3 to operate so that the first liquid outlet 201 corresponding to the indoor unit 21 operating in the heating mode is in liquid communication with the liquid inlet of the outdoor component 1. The second liquid outlet 203 corresponding to the indoor unit 21 operating in the cooling mode is in liquid communication with the liquid inlet of the outdoor component 1. The liquid outlet valve group 4 is controlled to operate so that the first liquid inlet 202 corresponding to the indoor unit 21 operating in the heating mode is in liquid communication with the liquid outlet of the outdoor component 1. The second liquid inlet 204 corresponding to the indoor unit 21 operating in the cooling mode is in liquid communication with the liquid inlet of the outdoor component 1. Thus, the refrigeration cycle of the indoor unit 21 operating in the cooling mode and the outdoor component 1 can be realized, and the heating cycle of the indoor unit 21 operating in the heating mode and the outdoor component 1 can be realized.

[0068] In an optional embodiment of the invention, the outdoor component 1 includes at least one outdoor unit, wherein the outdoor component 1 may include one outdoor unit or may include at least two outdoor units in series. The series connection of the outdoor units may be understood as the liquid outlet of the previous outdoor unit serving as the liquid inlet of the next outdoor unit, thereby realizing multi-stage heating or cooling of the circulating water. When the outdoor units are set to at least two, the liquid inlet of the first outdoor unit serves as the liquid inlet of the outdoor component 1, and the liquid outlet of the last outdoor unit serves as the liquid outlet of the outdoor component 1.

[0069] In an optional embodiment of the invention, referring to Figure 1 and Figure 3 As shown, the heat pump device further includes a hot water pump 6 , and the hot water pump 6 is arranged between the first liquid outlet 201 and the liquid inlet of the outdoor component 1 .

[0070] In the embodiment of the present invention, the heat pump device may further include a hot water pump 6, and the hot water pump 6 is located between the first liquid outlet 201 and the liquid inlet of the outdoor component 1. For example, the liquid inlet of the hot water pump 6 is in fluid communication with the first liquid outlet 201, and the liquid outlet of the hot water pump 6 is in fluid communication with the liquid inlet of the outdoor component 1, so that the hot water pump 6 can provide circulation power for high-temperature circulating water to improve the indoor heating efficiency in the heating mode.

[0071] In an optional embodiment of the invention, referring to Figure 1 and Figure 3 As shown, the heat pump device further includes a cooling water pump 7 , and the cooling water pump 7 is arranged between the second liquid outlet 203 and the liquid inlet of the outdoor component 1 .

[0072] In the embodiment of the present invention, the heat pump device may further include a refrigerating water pump 7. The refrigerating water pump 7 is located between the second liquid outlet 203 and the liquid inlet of the outdoor component 1. For example, the liquid inlet of the refrigerating water pump 7 is in fluid communication with the second liquid outlet 203, and the liquid outlet of the refrigerating water pump 7 is in fluid communication with the liquid inlet of the outdoor component 1, so that the circulation power of the low-temperature circulating water can be provided by the hot water pump 6 to improve the indoor heating efficiency in the cooling mode.

[0073] In summary, the embodiment of the present invention discloses a heat pump device, which may include at least two outdoor components 1, an indoor component 2, a liquid inlet valve group 3 and a liquid outlet valve group 4. The indoor component 2 includes at least two indoor units 21, wherein the liquid inlet of each outdoor component 1 is connected to the first liquid outlet 201 of the indoor component 2, and the liquid outlet of each outdoor component 1 is connected to the first liquid inlet 202 of the indoor component 2. The liquid inlet valve group 3 is connected to the second liquid outlet 203 of the indoor component 2 and the liquid inlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid inlet of the outdoor component 1 through the liquid inlet valve group 3. The liquid outlet valve group 4 is connected to the second liquid inlet 204 of the indoor component 2 and the liquid outlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid outlet of the outdoor component 1 through the liquid outlet valve group 4. Therefore, the conduction state of the liquid inlet valve group 3 and the liquid outlet valve group 4 can be adjusted by the cooling or heating mode of the indoor unit 21, and the functions of independent cooling, independent heating or simultaneous cooling and heating can be realized in multiple areas without adding a heat recovery module. Thus, the structural complexity of the heat pump device is reduced and the product adaptability of the heat pump device is improved.

[0074] The embodiment of the present invention further discloses an air conditioning system, which may include the heat pump device described in any one of the above-mentioned invention embodiments. The air conditioning system can be applied to temperature control scenarios in large commercial areas such as hotels, restaurants, and supermarkets. It can simultaneously meet the temperature control requirements of users in different temperature control areas, for example, it can perform independent cooling, independent heating, and simultaneous cooling and heating, etc., and has the characteristics of strong product applicability, simple structure, and convenient later maintenance.

[0075] Reference Figure 2 The embodiment of the present invention further discloses a control method for a heat pump device, the heat pump device may include the heat pump device described in any one of the above-mentioned embodiments of the invention, and the control method is applied to the controller 5, including:

[0076] S201 , obtaining the number of currently operating indoor units 21 of the indoor unit assembly 2 and the unit operation mode of each indoor unit 21 .

[0077] S202: Determine a target operation mode of the heat pump device according to the number of operating units and the operation mode of the units.

[0078] S203, adjusting the liquid inlet valve group 3 and the liquid outlet valve group 4 according to the target operation mode, and starting the outdoor component 1 to work.

[0079] In an embodiment of the present invention, the outdoor component 1, the indoor unit 21, the liquid inlet valve group 3 and the liquid outlet valve group 4 are electrically connected to the controller 5, respectively. Thus, the controller 5 can obtain the working status of each component. For example, the working status of each component is obtained at a preset time interval. Thus, the target operation mode of the heat pump device can be determined based on the number of units in operation among all indoor units 21 and the unit operation mode of the indoor unit 21. For example, between spring and summer, or in transitional seasons such as autumn and winter, when the weather changes significantly, some users may have cooling needs and some users may have heating needs. For another example, in some industry work, such as long-term storage of medicines or food, which is not affected by outdoor weather, the indoor unit 21 in the storage area needs to operate in cooling mode for a long time. Therefore, for a heat pump device, it may have needs such as single cooling, single heating, or simultaneous cooling and heating.

[0080] Therefore, the target operation mode of the heat pump device can be determined according to the unit operation mode of the indoor unit 21 and the number of operating units corresponding to the unit operation mode.

[0081] In some embodiments, reference Figure 3 As shown, when the unit operation modes of all the running indoor units 21 are heating modes, the target operation mode of the heat pump device is determined to be a full heating mode (which can also be understood as a separate heating mode). Therefore, when the target operation mode is a full heating mode, the controller 5 can control the liquid inlet valve group 3 to operate, so that the liquid inlet of the outdoor component 1 is connected to the first liquid outlet 201 of the indoor component 2. The liquid outlet of the outdoor component 1 is connected to the first liquid inlet 202 of the indoor component 2. In addition, the number of outdoor components 1 that match the cumulative heating power can be matched according to the cumulative heating power of the running indoor units 21 to obtain a target number. And the target number of outdoor components 1 are started to perform a heating cycle.

[0082] For example, taking the total number of outdoor components 1 as 10, when 8 outdoor components 1 are started, the high-temperature circulating water coming out of the outdoor component 1 first passes through the liquid outlet valve group 4 and reaches the first liquid inlet 202 of the indoor unit 21. Then, heat is released in the indoor unit 21 to heat the indoor air, achieving the indoor warming effect. Then, the circulating water flowing out of the first liquid outlet 201 of the indoor unit 21 is cooled to medium-temperature circulating water (for example, between 30 and 40 degrees Celsius). Then it flows to the liquid inlet valve group 3, and finally enters the outdoor components 1 respectively. After absorbing the heat of the high-temperature refrigerant in the outdoor component 1, it flows out from the liquid outlet of the outdoor component 1 for circulation.

[0083] Since the remaining outdoor components 1 are in shutdown mode, the conduction states of the liquid inlet three-way valve 31 and the liquid outlet three-way valve 41 at the liquid inlet of the outdoor components 1 in shutdown mode can be randomly determined, and no excessive restrictions are made here. Among them, the refrigeration water pump 7 can be in shutdown mode.

[0084] Reference Figure 4 As shown, when the unit operation modes of all the running indoor units 21 are cooling modes, the target operation mode of the heat pump device is determined to be a full cooling mode (which can also be understood as a single cooling mode).

[0085] Thus, when the target operation mode is the full cooling mode, the controller 5 can control the liquid inlet valve group 3 to operate, so that the liquid inlet of the outdoor component 1 is connected to the second liquid outlet 203 of the indoor unit 2. At this time, the liquid outlet of the outdoor component 1 is connected to the second liquid inlet 204 of the indoor unit 2. In addition, the number of outdoor components 1 that match the cumulative heating power can be matched according to the cumulative heating power of the running indoor unit 21 to obtain the target number. The target number of outdoor components 1 is started to perform the refrigeration cycle.

[0086] For example, taking the total number of outdoor components 1 as 10, when 8 outdoor components 1 are started, the low-temperature circulating water coming out of the outdoor component 1 first passes through the liquid outlet valve group 4 and reaches the second liquid inlet 204 of the indoor unit 21. Then it absorbs heat in the indoor unit 21, absorbs heat from the indoor air, and achieves the indoor cooling effect. Then the circulating water flowing out from the second liquid outlet 203 of the indoor unit 21 is cooled to medium and low temperature circulating water (for example, the temperature is between 10 and 15 degrees Celsius). Then it flows to the liquid inlet valve group 3, and finally enters the outdoor component 1 respectively. After absorbing the coldness of the low-temperature refrigerant in the outdoor component 1, it flows out from the liquid outlet of the outdoor component 1 for circulation.

[0087] Since the remaining outdoor components 1 are in shutdown mode, the conduction states of the liquid inlet three-way valve 31 and the liquid outlet three-way valve 41 at the liquid inlet of the outdoor components 1 in shutdown mode can be randomly determined, and no further restrictions are made here. Among them, the hot water pump 6 can be in shutdown mode.

[0088] Reference Figure 5 As shown, when the unit operation mode of the first operating number of indoor units 21 is the heating mode, and the unit operation mode of the second operating number of indoor units 21 is the cooling mode, the target operation mode of the heat pump device is determined to be a mixed operation mode (which can also be understood as a simultaneous cooling and heating mode).

[0089] When the target operation mode is a mixed operation mode, the first target number can be obtained by matching the number of outdoor components 1 that match the first cumulative heating power according to the first cumulative heating power of the first number of indoor units 21 in the heating mode. The first target number of outdoor components 1 are started to perform a heating cycle. The liquid inlet three-way valve 31 connected to the outdoor components 1 in the heating cycle is controlled to operate, so that the liquid inlet of the outdoor components 1 in the heating cycle is connected to the first liquid outlet 201 in a liquid path. The liquid outlet three-way valve 41 connected to the outdoor components 1 in the heating cycle is controlled to operate, so that the liquid outlet of the outdoor components 1 in the heating cycle is connected to the first liquid inlet 202 in a liquid path.

[0090] Furthermore, according to the second cumulative heating power of the second number of indoor units 21 in the cooling mode, the number of outdoor components 1 that match the second cumulative heating power is matched to obtain a second target number, and the second target number of outdoor components 1 are started to perform a refrigeration cycle. Among them, the liquid outlet three-way valve 41 connected to the outdoor components 1 in the refrigeration cycle is controlled to operate, so that the liquid inlet of the outdoor components 1 in the refrigeration cycle is connected to the second liquid outlet 203. The liquid outlet three-way valve 41 connected to the outdoor components 1 in the refrigeration cycle is controlled to operate, so that the liquid outlet of the outdoor components 1 in the refrigeration cycle is connected to the second liquid inlet 204.

[0091] Considering that when the target operation mode is a full heating mode or a mixed cooling and heating mode, there may be a situation where the outdoor ambient temperature is low, resulting in the risk of freezing and cracking of the pipes of the outdoor component 1 in the shutdown mode. Therefore, in some optional embodiments of the invention, the method further includes:

[0092] When it is detected that the outdoor component 1 is in the shutdown mode, the outdoor environment temperature of the outdoor component 1 is detected by a temperature sensor.

[0093] When the outdoor ambient temperature is lower than the first temperature threshold, the outdoor component 1 in the shutdown mode is switched to the heating mode.

[0094] In an embodiment of the present invention, when it is detected that the outdoor component 1 is in the shutdown mode, the outdoor ambient temperature can also be detected based on the temperature sensor installed on the outer surface of the outdoor component 1. The temperature sensor is electrically connected to the controller 5. Thus, when the temperature sensor transmits the outdoor ambient temperature to the controller 5, the controller 5 compares the outdoor ambient temperature. For example, a first temperature threshold can be preset. The first temperature threshold can be understood as a temperature threshold for determining whether the pipeline has a risk of freezing and cracking. It can be a value less than or equal to 1 degree Celsius. Therefore, when the outdoor ambient temperature is less than or equal to the first temperature threshold, the outdoor component 1 in the shutdown mode can be converted to the heating mode. At the same time, the liquid inlet three-way valve 31 and the liquid outlet three-way valve 41 associated with the outdoor component 1 are adjusted so that the outdoor component 1 performs a heating cycle.

[0095] In some optional embodiments, during the operation process after the outdoor component 1 in the shutdown mode is converted to the heating mode, the outdoor ambient temperature continues to be detected by the temperature sensor. If the outdoor ambient temperature exceeds the second temperature threshold, the operation of the outdoor component 1 is stopped, that is, the heating mode is converted to the shutdown mode. The second temperature threshold may include but is not limited to 3 degrees Celsius, 4 degrees Celsius, and 5 degrees Celsius. In this way, energy can be saved and energy waste can be avoided on the basis of ensuring that the pipeline will not be frozen.

[0096] In summary, the embodiment of the present invention discloses a heat pump device, an air conditioning system, and a control method for a heat pump device. The embodiment of the present invention may include at least two outdoor components 1, an indoor component 2, a liquid inlet valve group 3, and a liquid outlet valve group 4. The indoor component 2 includes at least two indoor units 21, wherein the liquid inlet of each outdoor component 1 is connected to the first liquid outlet 201 of the indoor component 2, and the liquid outlet of each outdoor component 1 is connected to the first liquid inlet 202 of the indoor component 2. The liquid inlet valve group 3 is connected to the second liquid outlet 203 of the indoor component 2 and the liquid inlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid inlet of the outdoor component 1 through the liquid inlet valve group 3. The liquid outlet valve group 4 is connected to the second liquid inlet 204 of the indoor component 2 and the liquid outlet of each outdoor component 1, so as to adjust the liquid path connection state of the liquid outlet of the outdoor component 1 through the liquid outlet valve group 4. Therefore, the conduction state of the liquid inlet valve group 3 and the liquid outlet valve group 4 can be adjusted by the cooling or heating mode of the indoor unit 21, and the functions of independent cooling, independent heating or simultaneous cooling and heating can be realized in multiple areas without adding a heat recovery module. Thus, the structural complexity of the heat pump device is reduced and the product adaptability of the heat pump device is improved.

[0097] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0098] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0099] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0100] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof.

[0101] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

Claims

1. A heat pump device, characterized in that: The heat pump device comprises: at least two outdoor components (1); An indoor unit assembly (2), the indoor unit assembly (2) comprising at least two indoor units (21), wherein the liquid inlet of each outdoor unit (1) is connected to the first liquid outlet (201) of the indoor unit assembly (2), and the liquid outlet of each outdoor unit (1) is connected to the first liquid inlet (202) of the indoor unit assembly (2); a liquid inlet valve group (3), the liquid inlet valve group (3) being connected to the second liquid outlet (203) of the indoor unit assembly (2) and the liquid inlet of each outdoor assembly (1), so as to adjust the liquid path connection state of the liquid inlet of the outdoor assembly (1) through the liquid inlet valve group (3); A liquid outlet valve group (4), wherein the liquid outlet valve group (4) is connected to the second liquid inlet (204) of the indoor unit component (2) and the liquid outlet of each outdoor component (1), so as to adjust the liquid path connection state of the liquid outlet of the outdoor component (1) through the liquid outlet valve group (4).

2. The heat pump device according to claim 1, characterized in that: The liquid inlet valve group (3) comprises at least two liquid inlet three-way valves (31), wherein the number of the liquid inlet three-way valves (31) is the same as the number of the outdoor components (1).

3. The heat pump device according to claim 2, characterized in that: The liquid inlet of each outdoor component (1) is connected to the first end of each liquid inlet three-way valve (31), the first liquid outlet (201) is connected to the second end of each liquid inlet three-way valve (31), and the second liquid outlet (203) is connected to the third end of each liquid inlet three-way valve (31).

4. The heat pump device according to claim 2, characterized in that: The liquid inlet three-way valve (31) is an electric three-way valve, and the heat pump device further comprises a controller (5), wherein the controller (5) is electrically connected to the liquid inlet three-way valve (31) so as to adjust the liquid path conduction state of the liquid inlet three-way valve (31) through the controller (5).

5. The heat pump device according to claim 1, characterized in that: The liquid outlet valve group (4) comprises at least two liquid outlet three-way valves (41), wherein the number of the liquid outlet three-way valves (41) is the same as the number of the outdoor components (1).

6. The heat pump device according to claim 5, characterized in that: The liquid outlet of each outdoor component (1) is connected to the first end of each liquid outlet three-way valve (41), the first liquid inlet (202) is connected to the second end of each liquid outlet three-way valve (41), and the second liquid inlet (204) is connected to the third end of each liquid outlet three-way valve (41).

7. The heat pump device according to claim 5, characterized in that: The liquid outlet three-way valve (41) is an electric three-way valve. The heat pump device further comprises a controller (5). The controller (5) is electrically connected to the liquid outlet three-way valve (41) so as to adjust the liquid path conduction state of the liquid outlet three-way valve (41) through the controller (5).

8. The heat pump device according to claim 1, characterized in that: The liquid inlet valve group (3) and the liquid outlet valve group (4) both adopt electric three-way valves. The heat pump device also includes a controller (5). The liquid inlet valve group (3), the liquid outlet valve group (4), the indoor unit component (2) and the outdoor unit (1) are respectively electrically connected to the controller (5) so that the controller (5) can control the liquid path connection state between the indoor unit component (2) and the outdoor unit (1).

9. The heat pump device according to claim 1, characterized in that: The outdoor component (1) comprises at least one outdoor unit.

10. The heat pump device according to claim 1, characterized in that: The heat pump device further comprises a hot water pump (6), wherein the hot water pump (6) is arranged between the first liquid outlet (201) and the liquid inlet of the outdoor component (1).

11. The heat pump device according to claim 1, characterized in that: The heat pump device further comprises a refrigeration water pump (7), wherein the refrigeration water pump (7) is arranged between the second liquid outlet (203) and the liquid inlet of the outdoor component (1).

12. An air conditioning system, characterized in that: The air conditioning system comprises a heat pump device as described in any one of claims 1-11.

13. A control method for a heat pump device, characterized in that: The heat pump device comprises the heat pump device according to any one of claims 1 to 11, and the control method comprises: Acquire the number of units currently in operation of the indoor units (21) of the indoor unit assembly (2) and the unit operation mode of each indoor unit (21); Determining a target operation mode of the heat pump device according to the number of units in operation and the unit operation mode; The liquid inlet valve group (3) and the liquid outlet valve group (4) are adjusted according to the target operation mode, and the outdoor component (1) is started to operate.

14. The control method of the heat pump device according to claim 13, characterized in that: Determining the target operation mode of the heat pump device according to the number of units in operation and the unit operation mode includes: When the unit operation modes of all the running indoor units (21) are heating modes, determining the target operation mode of the heat pump device to be a full heating mode; When the unit operation modes of all the running indoor units (21) are cooling mode, determining the target operation mode of the heat pump device to be a full cooling mode; When the unit operation mode of the first operating number of indoor units (21) is the heating mode and the unit operation mode of the second operating number of indoor units (21) is the cooling mode, the target operation mode of the heat pump device is determined to be the mixed operation mode.

15. The control method of the heat pump device according to claim 13, characterized in that: The method further comprises: When it is detected that the outdoor component (1) is in the shutdown mode, the outdoor environment temperature of the outdoor component (1) is detected by a temperature sensor; When the outdoor ambient temperature is lower than a first temperature threshold, the outdoor component (1) in the shutdown mode is switched to the heating mode.

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