Integrated water device applied to heat pump system and heat pump system

Abstract

The utility model provides an integrated water device applied to a heat pump system and the heat pump system, and the integrated water device comprises a main module, an auxiliary module and a three-way valve, when the heat pump system has the hot water making requirement and the air conditioner requirement at the same time, the first end and the second end of the three-way valve are controlled to be communicated, so that the heat pump main machine heats water in the living water tank through the main module, and the heat pump auxiliary machine provides a heat source or a cold source for the tail end device through the auxiliary module; and after heating of the domestic water tank is completed, the first end of the three-way valve is controlled to be switched to be communicated with the third end, so that the heat pump main machine and the heat pump auxiliary machine jointly provide a heat source or a cold source for the tail end device. Therefore, for the integrated water device, by switching the communication relation of the first end, the second end and the third end in the three-way valve, the heat pump system can simultaneously meet the hot water making requirement and the air conditioner requirement of the user, and the comfort level of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to an integrated water device applied to a heat pump system and a heat pump system. Background Art

[0002] As a highly efficient and energy-saving device that fully utilizes low-grade thermal energy, heat pumps offer both air conditioning (including cooling and heating) and hot water functions in practical applications. However, these functions cannot operate simultaneously. Existing heat pumps switch to hot water production only after the air conditioning function reaches the set temperature, or vice versa. This control scheme results in a poor user experience. For example, during the summer daytime, the air conditioning function needs to run continuously. If a user requires hot water at this time, switching the heat pump to hot water production will affect the user's air conditioning experience, thereby affecting their comfort. Utility Model Content

[0003] In view of this, an object of the present invention is to provide an integrated water device and a heat pump system for use in a heat pump system, so as to alleviate the above-mentioned problems.

[0004] In the first aspect, an embodiment of the present invention provides an integrated water device for use in a heat pump system, the integrated water device comprising: a main module, an auxiliary module and a three-way valve; wherein the main module is connected to the heat pump main unit of the heat pump system, the auxiliary module is respectively connected to the heat pump auxiliary unit and the terminal device of the heat pump system, the first end of the three-way valve is connected to the main module, the second end is connected to the domestic water tank of the heat pump system, and the third end is connected between the auxiliary module and the terminal device; when the heat pump system has both hot water production demand and air-conditioning demand, the first end and the second end of the three-way valve are controlled to be connected, so that the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides a heat source or a cold source to the terminal device through the auxiliary module; and, when the heating of the domestic water tank is completed, the first end of the three-way valve is controlled to switch to be connected to the third end, so that the heat pump main unit and the heat pump auxiliary unit jointly provide a heat source or a cold source to the terminal device.

[0005] For the above-mentioned integrated water device, when the heat pump system has both hot water and air-conditioning demands, the first end and the second end of the three-way valve are controlled to be connected. At this time, the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides a heat source or a cold source to the terminal device through the auxiliary module. The heat pump system simultaneously meets the user's hot water and air-conditioning demands; when the domestic water tank is heated, the first end of the three-way valve is controlled to switch to be connected to the third end, so that the heat pump main unit and the heat pump auxiliary unit jointly provide a heat source or a cold source to the terminal device. That is, on the basis of meeting the user's hot water demand, the user's air-conditioning experience is further guaranteed, avoiding some scenarios such as the poor air-conditioning experience of users in summer, and improving the user's comfort.

[0006] Preferably, the main module comprises a plurality of main pipes arranged in parallel; wherein each main pipe is provided with an electric heater, a first water pump, a first target flow switch and a first check valve.

[0007] Preferably, each main pipe is further provided with a pressure detection element.

[0008] Preferably, the number of the main pipes is consistent with the number of heat pump hosts.

[0009] Preferably, the auxiliary module comprises a plurality of auxiliary pipelines arranged in parallel; wherein each auxiliary pipeline is provided with a second water pump, a second target flow switch and a second check valve.

[0010] Preferably, the number of the auxiliary pipelines is consistent with the number of heat pump auxiliary machines.

[0011] In the second aspect, an embodiment of the present invention also provides a heat pump system, comprising: at least one heat pump main unit, at least one heat pump auxiliary unit, a domestic water tank, a terminal device and the integrated water device applied to the heat pump system of the first aspect mentioned above; wherein, the heat pump main unit, the heat pump auxiliary unit, the domestic water tank and the terminal device are all connected to the integrated water device.

[0012] Preferably, the terminal device includes a buffer water tank and an air-conditioning terminal; wherein the buffer water tank is connected to the auxiliary module and the air-conditioning terminal respectively.

[0013] Preferably, the heat pump system further comprises a filter; wherein the filter is arranged between the auxiliary module and the buffer water tank.

[0014] Preferably, the air-conditioning terminal includes at least one of the following: a floor heating coil, a radiator group and a fan coil.

[0015] In a third aspect, an embodiment of the present invention further provides a control method for a heat pump system, which is applied to the heat pump system of the second aspect, the method comprising:

[0016] When the demand for hot water and air conditioning is obtained at the same time, the first end and the second end of the three-way valve are controlled to be connected, and the heat pump main unit and the heat pump auxiliary unit are controlled to start and operate, so that the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides a heat source or a cold source to the terminal device through the auxiliary module;

[0017] During operation, the water temperature of the domestic water tank and the indoor ambient temperature corresponding to the terminal device are obtained; wherein the indoor ambient temperature is the indoor ambient temperature at the location of the air conditioner terminal;

[0018] Determine whether the domestic water tank is heated based on the water temperature and preset water temperature threshold;

[0019] If so, determine whether to control the three-way valve switching according to the indoor ambient temperature and the preset temperature threshold;

[0020] If so, the first end of the three-way valve is controlled to switch to connect to the third end, and the heat pump main unit and the heat pump auxiliary unit are controlled to continue running, so that the heat pump main unit and the heat pump auxiliary unit can jointly provide heat source or cold source to the terminal device.

[0021] Preferably, the step of judging whether the domestic water tank is heated according to the water temperature and the preset water temperature threshold comprises: if the difference between the water temperature and the preset water temperature threshold is not greater than a first difference threshold, judging that the domestic water tank is heated.

[0022] Preferably, the method also includes: if the difference between the water temperature and the preset water temperature threshold is greater than the first difference threshold and not greater than the second difference threshold, controlling the heat pump host to maintain the previous state; or, if the difference between the water temperature and the preset water temperature threshold is greater than the second difference threshold, controlling the heat pump host to continue heating the water in the domestic water tank.

[0023] Preferably, the step of determining whether to control the switching of the three-way valve according to the indoor ambient temperature and the preset temperature threshold includes: when the air-conditioning demand is a cooling demand, if the temperature difference between the indoor ambient temperature and the preset temperature threshold is greater than the third difference threshold, determining to control the switching of the three-way valve; or, if the temperature difference between the indoor ambient temperature and the preset temperature threshold is not greater than the third difference threshold, and is greater than the fourth difference threshold, and the difference between two adjacent indoor ambient temperatures within a preset time length is not greater than the fifth difference threshold, determining to control the switching of the three-way valve.

[0024] Preferably, the step of determining whether to control the switching of the three-way valve according to the indoor ambient temperature and the preset temperature threshold includes: when the air-conditioning demand is a heating demand, if the temperature difference between the indoor ambient temperature and the preset temperature threshold is less than the sixth difference threshold, determining to control the switching of the three-way valve; or, if the temperature difference between the indoor ambient temperature and the preset temperature threshold is not less than the sixth difference threshold, and is less than the seventh difference threshold, and the difference between two adjacent indoor ambient temperatures within the preset time length is not less than the eighth difference threshold, and is less than the ninth difference threshold, determining to control the switching of the three-way valve.

[0025] The embodiments of the present invention bring the following beneficial effects:

[0026] The embodiment of the present utility model provides an integrated water device and a heat pump system applied to a heat pump system. When the heat pump system has both hot water demand and air-conditioning demand, the first end and the second end of the three-way valve in the integrated water device are controlled to be connected. At this time, the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides a heat source or a cold source to the terminal device through the auxiliary module. The heat pump system simultaneously meets the user's hot water demand and air-conditioning demand; when the domestic water tank is heated, the first end of the three-way valve in the integrated water device is controlled to switch to be connected to the third end, so that the heat pump main unit and the heat pump auxiliary unit jointly provide a heat source or a cold source to the terminal device. That is, on the basis of meeting the user's hot water demand, the user's air-conditioning demand experience is further guaranteed, avoiding some scenarios such as the poor air-conditioning experience of users in summer, and improving the user's comfort.

[0027] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of a heat pump system provided in an embodiment of the present utility model;

[0031] Figure 2 A schematic diagram of a three-way valve reversing method provided by an embodiment of the present utility model;

[0032] Figure 3 Another schematic diagram of a three-way valve reversing according to an embodiment of the present invention;

[0033] Figure 4 A schematic structural diagram of another heat pump system provided by an embodiment of the present utility model;

[0034] Figure 5 A control flow chart of a heat pump system provided by an embodiment of the present utility model;

[0035] Figure 6 This is a control flow chart of another heat pump system provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] To facilitate understanding of this embodiment, the embodiment of the utility model is described in detail below.

[0038] Example 1

[0039] The embodiment of the present invention provides an integrated water device for use in a heat pump system, such as Figure 1 As shown, the integrated water device includes: a main module 11, an auxiliary module 12 and a three-way valve 13; wherein, the main module 11 is connected to the heat pump main unit 21 of the heat pump system, and the auxiliary module 12 is respectively connected to the heat pump auxiliary unit 22 and the terminal device of the heat pump system, and the first end (i.e., end A) of the three-way valve 13 is connected to the main module 11, the second end (i.e., end B) is connected to the domestic water tank 23 of the heat pump system, and the third end (i.e., end C) is connected between the auxiliary module 12 and the terminal device.

[0040] Specifically, for the above-mentioned integrated water device, when the heat pump system has both hot water demand and air-conditioning demand, the first end and the second end of the three-way valve 13 are controlled to be connected, that is, the A end and the B end are connected, so that the output end of the main module 11 is connected to the input end of the domestic water tank 23. At this time, the heat pump main unit 21 heats the water in the domestic water tank through the main module 11, and the heat pump auxiliary unit 22 provides a heat source or a cold source to the terminal device through the auxiliary module 12, so that the terminal device heats or cools the external environment. That is, at this time, the heat pump system satisfies the user's hot water demand and air-conditioning demand at the same time through the integrated water device.

[0041] Also, when the domestic water tank is heated, the first end of the three-way valve 13 in the integrated water device is controlled to switch to connect to the third end, that is, connect between end A and end C, so that the output end of the main module 11 is connected to the output end of the auxiliary module 12. At this time, the heat pump main unit 21 and the heat pump auxiliary unit 22 jointly provide a heat source or a cold source to the terminal device, so that the terminal device heats or cools the external environment. On the basis of meeting the user's hot water needs, the integrated water device switches the connection relationship between end A, end B and end C of the three-way valve, so that the heat pump main unit 21 and the heat pump auxiliary unit 22 jointly heat or cool the terminal device, further ensuring the user's air-conditioning experience, avoiding some scenarios such as the poor air-conditioning experience of users in summer, and thus improving the user's comfort.

[0042] In one embodiment, the main module 11 includes a plurality of main pipes arranged in parallel; Figure 1 As shown, only one main line 111 is shown here; the remaining main lines can refer to this main line 111. Each main line 111 is equipped with an electric heater, a first water pump, a first target flow switch, and a first check valve. Furthermore, each main line 111 is also equipped with a pressure detection element, preferably a pressure gauge, for detecting the pressure in the main line. The specific configuration can be adjusted based on actual conditions.

[0043] Furthermore, each main line 111 corresponds to a heat pump main unit 21, that is, the number of main lines 111 is consistent with the number of heat pump main units 21. In actual applications, when the heat pump system is turned on, the states of the multiple heat pump main units 21 remain consistent, that is, they are turned on and off at the same time, and the corresponding modes are executed according to user needs. For example, if the heat pump system only has a hot water demand, after the multiple heat pump main units 21 are turned on, they all execute the hot water mode and heat the water in the domestic water tank 23 through the corresponding main lines 111; if the heat pump system only has an air conditioning demand, at this time, after the multiple heat pump main units 21 are turned on, if the air conditioning demand is cooling, the cooling mode is executed, and if the air conditioning demand is heating, the heating mode is executed.

[0044] It should be noted that the aforementioned multiple heat pump main units 21 are preferably heat pump external units, and can be specifically configured according to actual circumstances. Furthermore, the installation locations of the electric heater, first water pump, first target flow switch, and first check valve in each main line 111 can be configured according to actual circumstances. Multiple components can be integrated into the integrated water device, or, in some scenarios, some components can be installed outside the integrated water device. The functions of each component can be referenced to existing technologies and will not be described in detail in this embodiment of the present invention.

[0045] Similarly, if Figure 1As shown, the auxiliary module 12 includes multiple auxiliary pipelines 121 arranged in parallel. Each auxiliary pipeline 121 is equipped with a second water pump, a second target flow switch, and a second check valve. Furthermore, each auxiliary pipeline 121 corresponds to one heat pump auxiliary unit 22, meaning the number of auxiliary pipelines 121 matches the number of heat pump auxiliary units 22.

[0046] In actual applications, when the heat pump system is turned on and there is a demand for air conditioning, the states of multiple heat pump auxiliary machines 22 remain consistent, that is, they are turned on and off at the same time. Moreover, during operation, according to the user's air conditioning needs, multiple heat pump auxiliary machines 22 execute the same air conditioning mode. If the air conditioning demand is a cooling demand, the cooling mode is executed. If the air conditioning demand is a heating demand, the heating mode is executed.

[0047] For any heat pump auxiliary unit 22, the heat pump auxiliary unit 22 provides a heat source or a cold source to the terminal device through the corresponding auxiliary pipeline 121, so that the terminal device heats or cools the external environment to meet the user's air conditioning needs. In addition, the first end and the third end of the three-way valve 13 can be controlled to connect to each other so that the output end of the main module 11 is connected to the output end of the auxiliary module 12. At this time, the heat pump main unit 21 is connected to the terminal device through the main module 11. The heat pump main unit 21 and the heat pump auxiliary unit 22 jointly provide a heat source or a cold source to the terminal device, so that the terminal device heats or cools the external environment, further ensuring the user's air conditioning experience.

[0048] It should be noted that the installation position of the second water pump, the second target flow switch and the second check valve in each auxiliary pipeline 121 can be set according to actual conditions, and the function of each component can refer to the existing technology, and the embodiments of the present invention will not be described in detail here.

[0049] In summary, for the integrated water device provided in the embodiment of the present invention, when the heat pump system has both hot water demand and air-conditioning demand, the integrated water device first controls the first end and the second end of the three-way valve to be connected, so that the output end of the main module is connected to the input end of the domestic water tank. At this time, the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides a heat source or a cold source to the terminal device through the auxiliary module. The heat pump system simultaneously meets the user's hot water demand and air-conditioning demand; when the domestic water tank is heated, the first end of the three-way valve in the integrated water device is controlled to switch to be connected to the third end, so that the output end of the main module is connected to the output end of the auxiliary module. At this time, the heat pump main unit and the heat pump auxiliary unit jointly provide a heat source or a cold source to the terminal device, that is, on the basis of meeting the user's hot water demand, the user's air-conditioning demand experience is further guaranteed, avoiding some scenarios such as the poor air-conditioning experience of users in summer, and improving the user's comfort.

[0050] Example 2

[0051] Based on the above-mentioned integrated water device, an embodiment of the present invention also provides a heat pump system, including: at least one heat pump main unit, at least one heat pump auxiliary unit, a domestic water tank, a terminal device and the above-mentioned integrated water device applied to the heat pump system; wherein, the heat pump main unit, the heat pump auxiliary unit, the domestic water tank and the terminal device are all connected to the integrated water device.

[0052] It should be noted that the heat pump main unit includes, but is not limited to, a compressor and a plate heat exchanger, etc., to provide a heat source or a cold source. The structure of the heat pump main unit can refer to existing heat pump main units and will not be described in detail in the embodiments of the present invention. Furthermore, the heat pump main unit and the heat pump auxiliary units have the same structure and may or may not be the same in number, and the specific configuration can be determined based on actual conditions.

[0053] For the sake of convenience, here we take a heat pump main unit and a heat pump auxiliary unit as an example. Figure 1 As shown, the heat pump system includes: a heat pump main unit 21, a heat pump auxiliary unit 22, a domestic water tank 23, a terminal device and the above-mentioned integrated water device; wherein, the heat pump main unit 21 is connected to the main module 11, the heat pump auxiliary unit 22 is connected to the auxiliary module 12, the main module 11 is connected to the A end of the three-way valve 13, the B end of the three-way valve 13 is connected to the domestic water tank 23, and the C end of the three-way valve 13 is connected between the auxiliary module 12 and the terminal device.

[0054] In addition, the terminal device includes a buffer water tank 24 and an air conditioning terminal 25; the buffer water tank 24 is connected to the auxiliary module 12 and the air conditioning terminal 25, respectively. The air conditioning terminal 25 includes at least one of the following: a floor heating coil, a radiator group, and a fan coil unit, and the specific configuration can be based on actual conditions. Furthermore, the heat pump system also includes a filter 27; the filter 27 is positioned between the auxiliary module 12 and the buffer water tank 24. The specific installation position of the filter 27 can be adaptively adjusted based on actual conditions. Its function can refer to existing filters and will not be described in detail in this embodiment of the present invention.

[0055] For the above heat pump system, its working principle is as follows:

[0056] (1) When the heat pump system only needs to produce hot water, Figure 2 As shown, the A end and the B end of the three-way valve 13 are connected. At this time, the output end of the main module 11 is connected to the input end of the domestic water tank 23. The heat pump host 21 provides a heat source to the domestic water tank 23 through the main module 11 (i.e., the main line 111) to heat the water in the domestic water tank 23, thereby meeting the user's hot water demand.

[0057] (2) When the heat pump system has an air conditioning demand (heating or cooling), the heat pump auxiliary unit 22 provides a heat source or a cold source to the buffer water tank 24 through the auxiliary module 12, so that the buffer water tank 24 can heat or cool the external environment through the air conditioning terminal 25 to meet the user's air conditioning needs.

[0058] In addition, in order to further improve the user's air conditioning comfort, such as quickly meeting the user's cooling needs in summer, the heat pump main unit 21 and the heat pump auxiliary unit 22 can also provide a cold source for the buffer water tank 24. Figure 3 As shown, the A end and the C end of the three-way valve 13 are connected. At this time, the output end of the main module 11 is connected to the output end of the auxiliary module 12. After the heat pump main unit 21 passes through the main module 11 (i.e., the main line 111), it and the heat pump auxiliary unit 22 jointly provide a cold source to the buffer water tank 24 to quickly meet the user's cooling needs.

[0059] (3) When the heat pump system has both hot water demand and air conditioning demand, the heat pump main unit 21 and the heat pump auxiliary unit 22 are turned on at the same time. The heat pump main unit 21 prioritizes meeting the hot water demand, while the heat pump auxiliary unit 22 meets the air conditioning demand. At this time, the A end and the B end of the three-way valve 13 are connected, and the heat pump main unit 21 provides a heat source to the domestic water tank 23 through the main module 11 (i.e., the main line 111) to heat the water in the domestic water tank 23, thereby meeting the user's hot water demand. At the same time, the heat pump auxiliary unit 22 provides a heat source or a cold source to the buffer water tank 24 through the auxiliary module 12, so that the buffer water tank 24 can achieve heating or cooling of the external environment through the air conditioning terminal 25 to meet the user's air conditioning demand.

[0060] Also, when the domestic water tank 23 is heated, the A end of the three-way valve 13 is switched to be connected to the C end. At this time, the output end of the main module 11 is connected to the output end of the auxiliary module 12. After the heat pump main unit 21 passes through the main module 11 (i.e., the main line 111), it and the heat pump auxiliary unit 22 jointly provide a heat source or a cold source to the buffer water tank 24, so that the buffer water tank 24 can achieve heating or cooling of the external environment through the air-conditioning terminal 25. On the basis of meeting the user's hot water demand, it further guarantees the user's air-conditioning demand experience, avoids some scenarios such as the poor air-conditioning experience of users in summer, and improves the user's comfort.

[0061] Example 3

[0062] For example, for a heat pump system including multiple heat pump hosts and multiple heat pump auxiliaries, Figure 4As shown, MA, SL1 and SL2 are three heat pump hosts arranged in parallel, SL3 to SL7 are multiple heat pump auxiliaries arranged in parallel, the multiple heat pump hosts are respectively connected to the three-way valve 13 through the corresponding main pipelines, and the multiple heat pump auxiliaries are respectively connected to the buffer water tank 24 through the corresponding auxiliary pipelines. The total input port end of the multiple auxiliary pipelines is also connected to the three-way valve 13, the three-way valve 13 is also connected to the domestic water tank 23, and the buffer water tank 24 is connected to the air-conditioning terminal 25. The air-conditioning terminal 25 contains multiple RTs, where RT can be a floor heating coil, a radiator group or a fan coil.

[0063] It should be noted that "AHS" stands for "gas-fired stove," and reference is made to the prior art for details. Furthermore, check valves MV2 and MV3, water pumps P2 and P3, and the like may be installed between the buffer water tank 24 and the air conditioning terminal 25. For details, reference is made to the prior art, and the embodiments of the present invention will not be described in detail here.

[0064] In actual use, the multiple heat pump main units MA, SL1, and SL2 are simultaneously turned on or off, and the multiple heat pump auxiliary units SL3-SL7 are simultaneously turned on or off. When the output of each main pipeline is connected to the input of the domestic water tank 23, the multiple heat pump main units MA, SL1, and SL2 are turned on and simultaneously heat the domestic water tank 23 to meet the user's hot water needs. At the same time, the multiple heat pump auxiliary units SL3-SL7 can also simultaneously provide heat or cold sources to the buffer water tank 24 through corresponding auxiliary pipelines to meet the user's air conditioning needs.

[0065] In addition, after the domestic water tank 23 is heated, in some scenarios, the port switching in the three-way valve 13 can also be controlled to connect the output end of the main line with the output end of the auxiliary line. At this time, the heat pump main units MA, SL1 and SL2 and multiple heat pump auxiliary units SL3~SL7 can simultaneously provide heat source or cold source to the buffer water tank 24, so that the buffer water tank 24 and the air-conditioning terminal 25 can achieve heating or cooling of the environment to meet the user's air-conditioning needs.

[0066] Therefore, the heat pump system can simultaneously meet the user's hot water and air conditioning needs, thereby improving the user's comfort.

[0067] Example 4

[0068] Based on the above heat pump system, the embodiment of the present invention further provides a control method for the heat pump system, such as Figure 5 As shown, the method includes the following steps:

[0069] Step S502: When both hot water demand and air conditioning demand are obtained, the first and second ends of the three-way valve are connected, and the heat pump main unit and the heat pump auxiliary unit are started and operated, so that the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides a heat source or a cold source to the terminal device through the auxiliary module;

[0070] Step S504: During operation, the water temperature of the domestic water tank and the indoor ambient temperature corresponding to the terminal device are obtained; wherein the indoor ambient temperature is the indoor ambient temperature at the location of the air conditioner terminal;

[0071] Specifically, in actual applications, the water temperature T1 of the domestic water tank and the indoor ambient temperature T2 corresponding to the terminal device can also be detected by a temperature sensor or a temperature sensing package. It should be noted that during the operation of the heat pump system, T1 and T2 can be detected in real time, or T1 and T2 can be detected at preset intervals. The specific settings can be made according to actual conditions.

[0072] Step S506: judging whether the domestic water tank is heated according to the water temperature and the preset water temperature threshold;

[0073] Step S508: If yes, determine whether to control the three-way valve to switch based on the indoor ambient temperature and the preset temperature threshold;

[0074] Step S510: If yes, control the first end of the three-way valve to switch to connect to the third end, and control the heat pump main unit and the heat pump auxiliary unit to continue running, so that the heat pump main unit and the heat pump auxiliary unit can jointly provide heat source or cold source to the terminal device.

[0075] The control method of the heat pump system described above can simultaneously meet the user's hot water and air conditioning needs by controlling the switching operation of the connection relationship between the first end, the second end and the third end of the three-way valve, thereby improving the user's comfort.

[0076] In one embodiment, the process of determining whether the domestic water tank is heated based on the water temperature and the preset water temperature threshold includes: if the difference between the water temperature and the preset water temperature threshold is not greater than a first difference threshold, determining that the domestic water tank is heated.

[0077] Specifically, during the heating process, the domestic water tank is also set with a target water temperature, i.e., a preset water temperature threshold TS1. For the detected water temperature T1, the difference between the water temperature and the preset water temperature threshold ΔT1=TS1-T1 is calculated, and whether the domestic water tank is heated is determined based on ΔT1. Figure 6 As shown, when ΔT1 is not greater than the first difference threshold (preferably 0° C.), that is, ΔT1 ≤ 0° C., it is determined that the heating of the domestic water tank is completed.

[0078] In addition, if △T1 is greater than the first difference threshold and is not greater than the second difference threshold (preferably 5°C), that is, 0°C<△T1≤5°C, then it means that the heating of the domestic water tank is about to be completed, and the heat pump host can be controlled to maintain the previous state, that is, continue to heat the domestic water tank according to the previous state until the heating is completed.

[0079] Also, if △T1 is greater than the second difference threshold, that is, △T1>5℃, at this time, it means that the water temperature of the domestic water tank is far away from the target water temperature, and it is necessary to control the heat pump host to continue heating the water in the domestic water tank, such as controlling the heat pump host to provide more heat sources to increase the heating rate of the domestic water tank, thereby improving the user's comfort.

[0080] It should be noted that when △T1≤0℃, it is determined that the heating of the domestic water tank is completed. At this time, it is also necessary to judge whether the heat pump auxiliary unit has completed the air-conditioning demand, and control the status of the heat pump main unit according to the situation, such as controlling the heat pump main unit to shut down after the domestic water tank reaches the temperature, or controlling the three-way valve to switch so that the heat pump main unit switches to provide a heat source or a cold source to the terminal device.

[0081] Based on this, in step S508, when determining whether to control the three-way valve switching based on the indoor ambient temperature and the preset temperature threshold, it is also necessary to make a separate determination based on the specific air conditioning demand (cooling or heating). For ease of explanation, let the user-set target indoor temperature, i.e., the preset temperature threshold, be TS2, and set the temperature difference between the indoor ambient temperature and the preset temperature threshold to ΔT2 = T2 - TS2.

[0082] In one judgment method, when the air conditioning demand is a cooling demand, the three-way valve switching can be determined as long as one of the following conditions is met. Specifically, as follows:

[0083] ① If △T2 is greater than the third difference threshold (preferably 2°C), that is, △T2>2°C, it means that the indoor ambient temperature T2 has not yet reached the preset temperature threshold TS2. At this time, it is determined that the three-way valve is switched to control the heat pump main unit and the heat pump auxiliary unit to jointly provide a cold source to the terminal device, so that the indoor ambient temperature can quickly reach the preset temperature threshold, thereby quickly meeting the user's air conditioning needs on the basis of meeting the user's hot water needs.

[0084] ② If the temperature difference between the indoor ambient temperature and the preset temperature threshold is not greater than the third difference threshold, and is greater than the fourth difference threshold (preferably 0°C), and the difference between two adjacent indoor ambient temperatures within the preset time is not greater than the fifth difference threshold (preferably 0.2°C), where the preset time is preferably 60s, that is, when 0°C < ΔT2 ≤ 2°C, and T (i-1)2 -T i2 When the temperature is ≤0.2℃, the three-way valve is switched; T i2 Indicates the current indoor ambient temperature, T(i-1)2 Indicates the indoor ambient temperature at the last moment, that is, the indoor ambient temperature 60 seconds ago.

[0085] When T (i-1)2 -T i2 When the temperature is higher than 0.2℃, it indicates that the heat pump auxiliary unit has sufficient capacity. At this time, the heat pump main unit does not need to provide a cold source for the terminal device. Since the domestic water tank is heated, the heat pump main unit is controlled to stop at the temperature. On the contrary, when 0℃<△T2≤2℃, and T (i-1)2 -T i2 When the temperature is ≤0.2℃, it indicates that the capacity of the heat pump auxiliary unit is insufficient, and it is necessary to control the first end of the three-way valve to switch to the third end to switch the heat pump main unit to the operation of air conditioning demand, so that the heat pump main unit and the heat pump auxiliary unit can jointly provide a cold source to the terminal device, so that the indoor ambient temperature can quickly reach the preset temperature threshold, thereby quickly meeting the user's air conditioning needs on the basis of meeting the user's hot water needs.

[0086] In addition, if △T2≤0℃, it means that the indoor ambient temperature has reached the preset temperature threshold. At this time, the heat pump host is not needed to provide a cold source for the terminal device. Since the domestic water tank has been heated, the heat pump host is controlled to shut down.

[0087] In another judgment method, when the air conditioning demand is a heating demand, the three-way valve switching can be determined as long as one of the following conditions is met. The specific conditions are as follows:

[0088] ① If △T2 is less than the sixth difference threshold (preferably -2°C), that is, △T2 < -2°C, it means that the indoor ambient temperature T2 has not yet reached the preset temperature threshold TS2. At this time, it is determined that the three-way valve is switched to control the heat pump main unit and the heat pump auxiliary unit to jointly provide heat source to the terminal device, so that the indoor ambient temperature can quickly reach the preset temperature threshold, thereby quickly meeting the user's air conditioning needs on the basis of meeting the user's hot water needs.

[0089] ② If the temperature difference between the indoor ambient temperature and the preset temperature threshold is not less than the sixth difference threshold, and is less than the seventh difference threshold (preferably 0°C), and the difference between two adjacent indoor ambient temperatures within the preset time is not less than the eighth difference threshold (preferably -0.2°C), and is less than the ninth difference threshold (preferably 0°C), the preset time is preferably 60s, that is, when -2°C ≤ △T2 < 0°C, and -0.2°C ≤ T (i-1)2 -T i2 When the temperature is less than 0℃, the three-way valve is switched.

[0090] When T (i-1)2 -T i2When the temperature is ≤-0.2℃, it indicates that the heat pump auxiliary unit has sufficient capacity. At this time, the heat pump main unit does not need to provide heat source to the terminal device. Since the domestic water tank is heated, the heat pump main unit is controlled to stop when the temperature reaches the limit. On the contrary, when -2℃≤△T2<0℃, and -0.2℃≤T (i-1)2 -T i2 When the temperature is less than 0℃, it indicates that the capacity of the heat pump auxiliary unit is insufficient, and it is necessary to control the first end of the three-way valve to switch to the third end to switch the heat pump main unit to the operation of air conditioning demand, so that the heat pump main unit and the heat pump auxiliary unit can jointly provide heat source to the terminal device, so that the indoor ambient temperature can quickly reach the preset temperature threshold, thereby quickly meeting the user's air conditioning demand on the basis of meeting the user's hot water demand.

[0091] In addition, if △T2≥0℃, it means that the indoor ambient temperature has reached the preset temperature threshold. At this time, the heat pump host does not need to provide heat source to the terminal device. Since the domestic water tank has been heated, the heat pump host is controlled to shut down at this time.

[0092] It should be noted that the specific values of the above-mentioned difference thresholds can be adaptively adjusted according to actual conditions.

[0093] The control method of the heat pump system provided in the embodiment of the present invention has the same technical features as the heat pump system provided in the above embodiment, and therefore can also solve the same technical problems and achieve the same technical effects.

[0094] An embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the control method of the above-mentioned heat pump system.

[0095] This embodiment further provides a machine-readable storage medium, which stores machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions prompt the processor to implement the control method of the heat pump system.

[0096] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems and devices can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0097] In addition, in the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0098] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0099] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0100] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An integrated water device for a heat pump system, characterized in that: The integrated water device includes: a main module, an auxiliary module and a three-way valve; wherein the main module is connected to the heat pump main unit of the heat pump system, the auxiliary module is connected to the heat pump auxiliary unit and the terminal device of the heat pump system respectively, the first end of the three-way valve is connected to the main module, the second end is connected to the domestic water tank of the heat pump system, and the third end is connected between the auxiliary module and the terminal device; When the heat pump system has both hot water production and air conditioning demands, the first end and the second end of the three-way valve are controlled to be connected, so that the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides a heat source or a cold source to the terminal device through the auxiliary module; and when the heating of the domestic water tank is completed, the first end of the three-way valve is controlled to switch to be connected to the third end, so that the heat pump main unit and the heat pump auxiliary unit jointly provide a heat source or a cold source to the terminal device.

2. The integrated water device for heat pump system according to claim 1, characterized in that: The main module includes a plurality of main pipes arranged in parallel; wherein each of the main pipes is provided with an electric heater, a first water pump, a first target flow switch and a first check valve.

3. The integrated water device for heat pump system according to claim 2, characterized in that: Each of the main pipes is also provided with a pressure detection element.

4. The integrated water device for heat pump system according to claim 2, characterized in that: The number of the main pipes is consistent with the number of the heat pump hosts.

5. The integrated water device for heat pump system according to claim 1, characterized in that: The auxiliary module includes a plurality of auxiliary pipelines arranged in parallel; wherein each of the auxiliary pipelines is provided with a second water pump, a second target flow switch and a second check valve.

6. The integrated water device for heat pump system according to claim 5, characterized in that: The number of the auxiliary pipelines is consistent with the number of the heat pump auxiliary machines.

7. A heat pump system, characterized in that: include: At least one heat pump main unit, at least one heat pump auxiliary unit, a domestic water tank, a terminal device, and an integrated water device applied to a heat pump system as described in any one of claims 1 to 6 above; wherein the heat pump main unit, the heat pump auxiliary unit, the domestic water tank, and the terminal device are all connected to the integrated water device.

8. The heat pump system according to claim 7, characterized in that The terminal device includes a buffer water tank and an air-conditioning terminal; wherein the buffer water tank is connected to the auxiliary module and the air-conditioning terminal respectively.

9. The heat pump system according to claim 8, characterized in that The heat pump system further includes a filter; wherein the filter is disposed between the auxiliary module and the buffer water tank.

10. The heat pump system according to claim 8, characterized in that The air conditioning terminal includes at least one of the following: a floor heating coil, a radiator group and a fan coil.

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