Heat pump system, control method and device thereof and storage medium

Abstract

The invention discloses a heat pump system, a control method and device thereof and a storage medium. The heat pump system comprises a three-way valve and a first branch, the first end point of the first branch is arranged on a water inlet pipeline between an air conditioner outdoor unit and an air conditioner indoor unit, and the second end point of the first branch is communicated with the three-way valve; a first end point of the second branch is arranged on the water return pipeline between the water collector and the water tank, and a second end point of the second branch is communicated with the three-way valve; a first end point of the third branch is arranged on the water return pipeline between the water tank and the air conditioner outdoor unit, and a second end point of the third branch is communicated with the three-way valve. The three-way valve is installed in the first-stage heat pump water system and communicated with the three branches, connection and disconnection of the three-way valve and the three branches are comprehensively controlled according to operation information of the heat pump system, an air conditioner water flow path is adjusted, the indoor temperature is increased preferentially, and then the water use requirement of a user is met, so that the energy saving performance of a unit is improved, and the energy use efficiency is remarkably improved; unnecessary waste is reduced, and user comfort and overall economy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump systems, and in particular to a heat pump system and a control method, device and storage medium thereof. Background Art

[0002] With the rapid development of the economy and the continuous improvement of consumers' requirements for quality of life, energy efficiency and environmental protection issues have become increasingly important. In this context, the application and development of load regulation technology is particularly critical. Load regulation technology aims to optimize energy efficiency and reduce waste through intelligent management methods, while meeting consumers' needs for comfort and environmental protection.

[0003] Modern consumers not only pay attention to the functions and performance of products, but also pay more and more attention to the energy efficiency and environmental protection characteristics of products. Especially in homes and commercial buildings, consumers' awareness of energy management is increasing, and they hope to adopt efficient and intelligent systems to reduce energy consumption and operating costs. For a primary heat pump water heater, when the outdoor temperature is low and the temperature and hot water requirements are met at the same time, the temperature adjustment will be slow, which will reduce consumers' comfort and satisfaction.

[0004] With regard to the problem in the prior art that the primary heat pump system is slow in regulating the room temperature, thus affecting the user experience, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a heat pump system and a control method, device, and storage medium thereof to solve the problem in the prior art that the primary heat pump system is slow in regulating the room temperature, thus affecting the user experience.

[0006] To solve the above technical problems, the present invention provides a heat pump system, which includes an air-conditioning outdoor unit, an air-conditioning indoor unit, a water collector, and a water tank, wherein the heat pump system also includes a three-way valve, and: a first branch, whose first end point is arranged on the water inlet pipe between the air-conditioning outdoor unit and the air-conditioning indoor unit, and whose second end point is connected to the three-way valve; a second branch, whose first end point is arranged on the return water pipe between the water collector and the water tank, and whose second end point is connected to the three-way valve; a third branch, whose first end point is arranged on the return water pipe between the water tank and the air-conditioning outdoor unit, and whose second end point is connected to the three-way valve.

[0007] The present invention also provides a control method for a heat pump system, which is applied to the above-mentioned heat pump system, wherein the method includes: obtaining operating information of the heat pump system; wherein the operating information includes at least one of the following: whether to enter the defrost state, the indoor temperature of the room where the air-conditioning indoor unit is located, the load of the entire machine, and the inlet and outlet water temperature difference of the heat pump system; and controlling the on-off between the three-way valve and the first branch, the second branch, and the third branch according to the operating information.

[0008] Furthermore, controlling the on-off between the three-way valve and the first branch and the second branch according to the operating information includes: judging whether the heat pump system enters the defrost state according to the operating information; if so, executing the first control strategy to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein the first control strategy is to control the air-conditioning water to directly enter the water system circulation, and the air-conditioning water does not pass through the water tank; if not, further determining the corresponding control strategy according to the temperature difference between the set temperature and the indoor temperature to control the on-off between the three-way valve and the first branch, the second branch, and the third branch.

[0009] Furthermore, a corresponding control strategy is determined based on the temperature difference between the set temperature and the indoor temperature to control the on-off between the three-way valve and the first branch, the second branch, and the third branch, including: if the temperature difference is ≥A, a second control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein the second control strategy is to control the air-conditioning water to flow through the indoor unit of the air conditioner and then enter the water system circulation, and the air-conditioning water does not pass through the water tank; A is a preset value; if the temperature difference is <A, a corresponding control strategy is further determined based on the load of the entire machine to control the on-off between the three-way valve and the first branch, the second branch, and the third branch.

[0010] Furthermore, a corresponding control strategy is further determined according to the whole machine load to control the on-off between the three-way valve and the first branch, the second branch, and the third branch, including: if the whole machine load is ≤a%, the third control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein the third control strategy is to control the air-conditioning water to flow through the air-conditioning indoor unit and the water tank, and then enter the water system circulation; if the whole machine load is ≥b%, the second control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; if a%<the whole machine load<b%, the corresponding control strategy is further determined according to the inlet and outlet water temperature difference to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein a and b are preset values.

[0011] Furthermore, a corresponding control strategy is further determined according to the inlet and outlet water temperature difference to control the on-off between the three-way valve and the first branch, the second branch, and the third branch, including: if the inlet and outlet water temperature difference is ≤c%, the third control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; if the inlet and outlet water temperature difference is ≥d%, the second control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; if c%<the whole machine load<d%, the current control strategy is maintained; wherein c and d are preset values.

[0012] Furthermore, the first control strategy is to control the first branch to be opened, the second branch to be closed, and the third branch to be opened.

[0013] Furthermore, the second control strategy is to control the first branch to be closed, the second branch to be opened, and the third branch to be opened.

[0014] Furthermore, the third control strategy is to control the first branch to be closed, the second branch to be closed, and the third branch to be closed.

[0015] The present invention also provides a control device for a heat pump system, which is used to implement the above-mentioned control method for the heat pump system, wherein the device includes: an acquisition module, which is used to obtain operating information of the heat pump system; wherein the operating information includes at least one of the following: whether to enter the defrost state, the indoor temperature of the room where the air-conditioning indoor unit is located, the load of the whole machine, and the inlet and outlet water temperature difference of the heat pump system; a control module, which is used to control the on-off between the three-way valve and the first branch, the second branch, and the third branch according to the operating information.

[0016] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program implements the above method when executed by a processor.

[0017] By applying the technical solution of the present invention, a three-way valve is installed in the primary heat pump water system. The three-way valve connects three branches and is easy to operate. The on-off of the three-way valve and the three branches is comprehensively controlled according to the defrost state, indoor temperature, real-time load of the air conditioner and the inlet and outlet water temperature difference, and the air-conditioning water flow path is adjusted to give priority to increasing the indoor temperature and then meet the user's water demand, thereby improving the energy saving of the unit, significantly improving energy utilization efficiency, reducing unnecessary waste, and improving user comfort and overall economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a heat pump system according to an embodiment of the present invention;

[0019] Figure 2is a flow chart of a control method of a heat pump system according to an embodiment of the present invention;

[0020] Figure 3 is a control logic diagram of a heat pump system according to an embodiment of the present invention;

[0021] Figure 4 is a structural block diagram of a control device for a heat pump system according to an embodiment of the present invention;

[0022] Reference numerals:

[0023] 1 is the outdoor unit of the air conditioner, 2 is the stop valve, 3 is the water pump, 4 is the safety valve, 5 is the thermometer, 6 is the pressure gauge, 7 is the check valve, 8 is the electric two-way valve for the outdoor unit, 9 is the stop valve, 10 is the indoor unit of the air conditioner, 11 is the terminal electric two-way valve, 12 is the water distributor, 13 is the water collector, 14 is the three-way valve, 15 is the water tank, and 16 is the Y-type water filter. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0026] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] It should be understood that although the terms first, second, third, etc. may be used to describe branches in the embodiments of the present invention, these should not be limited to these terms. These terms are only used to distinguish branches. For example, without departing from the scope of the embodiments of the present invention, the first branch may also be referred to as the second branch, and similarly, the second branch may also be referred to as the first branch.

[0028] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0029] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0030] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] During the actual operation of the air conditioning system, it is necessary to adjust the operating status according to the actual situation. For example, when the heat pump is heating at low temperature, due to the influence of air temperature and environmental humidity, the unit fins are frosted, resulting in the performance of the whole unit attenuation. At this time, the unit needs to be defrosted to change the heating state to the cooling state, which will have an adverse effect on the room temperature and reduce the user's comfort. At some specific times, such as in the evenings of winter and summer, this is the peak user period, resulting in a large load on the whole machine and a high temperature demand. If it is operated according to the normal water circuit at this time, it will take a long time to reach the user-set temperature, and the efficiency is low. It cannot achieve a good cooling or heating effect, which seriously affects the user experience. In addition, when the air conditioning unit has not been used for a long time, the water temperature of the air conditioning water and the water tank is basically the same as the room temperature. At this time, the temperature difference with the user-set temperature is large. If it is turned on and operated normally, the water circuit flows through the water tank, the air conditioning water temperature will remain unchanged for a long time, and the room temperature changes slowly.

[0033] In view of the above situation, the traditional primary heat pump water system does not have the adjustment function. Based on this, this embodiment proposes a heat pump system, in which a three-way valve is installed in the primary heat pump water system. The three-way valve connects three branches, so that the primary water system can have a real-time adjustment function without installing an additional water pump like the secondary water system, thereby reducing costs, improving the economy of the air-conditioning system, and enhancing the user experience.

[0034] Figure 1 is a schematic structural diagram of a heat pump system according to an embodiment of the present invention, Figure 1In the middle: 1 is the outdoor unit of the air conditioner, 2 is the stop valve, 3 is the water pump, 4 is the safety valve, 5 is the thermometer, 6 is the pressure gauge, 7 is the check valve, 8 is the electric two-way valve for the outdoor unit, 9 is the stop valve, 10 is the indoor unit of the air conditioner, 11 is the terminal electric two-way valve, 12 is the water distributor, 13 is the water collector, 14 is the three-way valve, 15 is the water tank, and 16 is the Y-type water filter.

[0035] The existing heat pump system includes an air conditioner outdoor unit 1, an air conditioner indoor unit 10, a water collector 13, a water tank 15, etc. In this embodiment, a three-way valve 14 is installed in the primary heat pump water system, and the three-way valve 14 connects three branches, so that the primary water system can have the function of real-time temperature regulation. Figure 1 The middle dashed line is the water inlet pipe, the dotted line is the water return pipe, and the thick solid line is the flow path (three branches) of the three-way valve added in the primary water system. The three branches are introduced below:

[0036] A first branch 21, a first end point of which is arranged in a water inlet pipe between the air conditioner outdoor unit 1 and the air conditioner indoor unit 10, and a second end point of which is communicated with the three-way valve 14;

[0037] A second branch 22, a first end of which is disposed on the return pipe between the water collector 13 and the water tank 15, and a second end of which is connected to the three-way valve 14;

[0038] The third branch 23 has a first end point disposed on the water return pipeline between the water tank 15 and the air conditioner outdoor unit 1 , and a second end point communicated with the three-way valve 14 .

[0039] like Figure 1 As shown, the structure of the heat pump system of this embodiment connects the water inlet pipe and the return pipe and returns directly to the air conditioner outdoor unit over the water tank, and installs a three-way valve at the pipeline connection. According to the temperature difference between the room temperature set by the user and the actual temperature, the real-time whole machine load and the inlet and outlet water temperature difference are used as input signals, and the main board performs comprehensive analysis and judgment through the input signals to realize the change of the air conditioning water flow path, so that the primary water system has a real-time adjustment function, reduces costs without the need to install an additional water pump, improves the economy of the air conditioning system, enhances the user experience, and saves energy and is environmentally friendly.

[0040] Example 2

[0041] According to an embodiment of the present invention, a control method embodiment of a heat pump system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0042] Figure 2 is a flow chart of a control method of a heat pump system according to an embodiment of the present invention, and the control method is applied to the above-mentioned heat pump system, such as Figure 2 As shown, the method comprises the following steps:

[0043] Step S201, obtaining operation information of the heat pump system; wherein the operation information includes at least one of the following: whether to enter the defrosting state, the indoor temperature of the room where the air conditioner is located, the whole machine load, and the inlet and outlet water temperature difference of the heat pump system;

[0044] Step S202, controlling the on-off between the three-way valve and the first branch, the second branch, and the third branch according to the operation information.

[0045] This embodiment comprehensively controls the on-off of the three-way valve and the three branches according to the defrost state, indoor temperature, real-time load of the air conditioner and the inlet and outlet water temperature difference, adjusts the air conditioning water flow path, gives priority to increasing the indoor temperature, and then meets the user's water demand, thereby improving the energy saving of the unit, significantly improving energy utilization efficiency, reducing unnecessary waste, and improving user comfort and overall economy.

[0046] When controlling the on-off between the three-way valve and the first branch and the second branch according to the operating information, first determine whether the heat pump system enters the defrost state according to the operating information. The judgment condition for entering the defrost state can be set to: the fin surface temperature is lower than the dew point temperature at that time. For example, the dew point temperature is 0°C at this time, and the fin temperature is -2°C at this time. -2°C<0°C, then the defrost state is entered at this time.

[0047] 1) If the heat pump system enters the defrost state, the first control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein the first control strategy is to control the air-conditioning water to directly enter the water system circulation, and the air-conditioning water does not pass through the water tank; specifically, the first control strategy is to control the first branch to be opened, the second branch to be closed, and the third branch to be opened. When the unit determines that it has entered the defrost state, the unit will switch the four-way valve for defrost control. To prevent the outlet water temperature from being too low, the air-conditioning water flow is controlled by the three-way valve at this time. The air-conditioning water enters the return water pipe without passing through the user end, and bypasses the water tank and directly enters the air-conditioning outdoor unit for water system circulation (i.e., the above-mentioned first control strategy), thereby reducing the impact on the user's ambient temperature during the defrost process.

[0048] 2) If the unit does not enter the defrosting state, then further determine the corresponding control strategy according to the temperature difference between the set temperature and the indoor temperature to control the on-off between the three-way valve and the first branch, the second branch, and the third branch. The above temperature difference is the difference between the set temperature and the indoor temperature, that is, the temperature difference = |set temperature-indoor temperature|. Specifically, it can be achieved through the following preferred implementations:

[0049] 21) If the temperature difference is ≥A, the second control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein the second control strategy is to control the air-conditioning water to flow through the air-conditioning indoor unit and then enter the water system circulation, and the air-conditioning water does not pass through the water tank; A is a preset value. The above second control strategy is to control the first branch to be closed, the second branch to be opened, and the third branch to be opened. When the temperature difference is ≥A, due to the large temperature difference, it takes a long time for the room temperature to rise. If the air-conditioning water flows through the water tank at this time, the water usage and the temperature in the room will not quickly reach a state that satisfies the user. Therefore, at this time, the air-conditioning water does not pass through the water tank, but directly enters the air-conditioning system circulation (that is, the above second control side) to shorten the temperature rise time.

[0050] 22) If the temperature difference is less than A, the corresponding control strategy is further determined according to the whole machine load to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch. Specifically:

[0051] 221) If the whole machine load is ≤a%, the third control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein the third control strategy is to control the air-conditioning water to flow through the air-conditioning indoor unit and the water tank, and then enter the water system circulation. The third control strategy is to control the first branch to be closed, the second branch to be closed, and the third branch to be closed. The whole machine load ≤a% means that there are fewer end users and the real-time load is small. Through the control of the three-way valve, the air-conditioning water should flow through the user and enter the water tank, and finally enter the air-conditioning water system circulation, while meeting the user's set temperature and water demand (that is, the above-mentioned third control strategy).

[0052] 222) If the whole machine load is ≥ b%, the second control strategy is executed to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch;

[0053] The whole machine load ≥ b% indicates that there are many end users, the demand is large, the real-time load is large, and the compressor frequency is increased. At this time, the air-conditioning water flows through the end users, passes through the three-way valve, crosses the water tank, and directly enters the air-conditioning water system circulation to achieve rapid cooling or heating (that is, the second control strategy mentioned above). When the temperature difference is less than A, the user's temperature experience can basically be met. After adjustment by the three-way valve, the air-conditioning water flows through the user and the water tank to meet the user's water demand. The above a and b are preset values.

[0054] 223) If a% < machine load < b%, then further determine the corresponding control strategy based on the inlet and outlet water temperature difference to control the on-off between the three-way valve and the first branch, the second branch, and the third branch. The inlet and outlet water temperature difference is the temperature difference between the inlet water temperature and the outlet water temperature, that is, the inlet and outlet water temperature difference = |inlet water temperature - outlet water temperature|. Specifically:

[0055] 2231) If the inlet and outlet water temperature difference is ≤c%, the third control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch. The inlet and outlet water temperature difference is ≤c%, indicating that the inlet and outlet water temperature difference is small at this time, proving that the heat exchange is sufficient, so the air-conditioning water can be set to flow through the end user, through the water tank, and then enter the air-conditioning system circulation (that is, the third control strategy mentioned above).

[0056] 2232) If the inlet and outlet water temperature difference is ≥ d%, the second control strategy is executed to control the on-off between the three-way valve and the first branch, the second branch, and the third branch. The inlet and outlet water temperature difference ≥ d% indicates that the inlet and outlet water temperature difference is large at this time, indicating that the required heat exchange amount is large, so the air-conditioning water can be set to return directly to the air-conditioning system circulation through the end user (that is, the above-mentioned second control strategy).

[0057] 2233) If c%<whole machine load<d%, maintain the current control strategy, that is, maintain the original operation state unchanged, until the inlet and outlet water temperature difference is ≤c%, and then set the air conditioning water to pass through the water tank to meet the user's water demand in time. The above c and d are preset values.

[0058] This embodiment adjusts the flow path of air-conditioning water through a three-way valve. By adding a three-way valve to the primary water pump system, the regulation effect of the secondary water system is achieved. The operation is simple and the installation is convenient. It can be accurately adjusted according to the actual situation, which is economical and environmentally friendly. It can meet the user's comfort even when the load is insufficient, and improve the reliability and scope of application of the product. Through intelligent control and optimization, this embodiment can significantly improve energy efficiency and reduce unnecessary waste, thereby meeting user needs.

[0059] Example 3

[0060] Figure 3 is a control logic diagram of a heat pump system according to an embodiment of the present invention, Figure 3 In the figure, Defrost is the defrost state judgment, ΔT is the temperature difference between the user set temperature and the actual room temperature, and A is the preset temperature difference threshold (for example, A is set to 2°C). P is the whole machine load, assuming that the end user is N. When B users are turned on at the same time, the whole machine load is B / N%, that is, a%. When C users are turned on at the same time, the whole machine load is C / N%, that is, b%. The two preset thresholds of the whole machine load are a% (for example, 25%) and b% (for example, 75%), b>a>0. Δt is the temperature difference between the water temperature of the inlet pipe and the water temperature of the outlet pipe. The two preset thresholds of the inlet pipe temperature difference are c℃ (for example, 5℃) and d℃ (for example, 7℃), d>c>0.

[0061] like Figure 3 As shown, the control logic is as follows:

[0062] 1) The unit operates normally and determines whether it has entered the defrosting state.

[0063] 2) When the unit judges that it has entered the defrost state, the unit will switch the four-way valve for defrost control. To prevent the outlet water temperature from being too low, the air conditioning water flow is controlled by the three-way valve at this time. The air conditioning water enters the return water pipe without passing through the user end, and bypasses the water tank and directly enters the air conditioning outdoor unit for water system circulation (i.e. ST0, the first control strategy), so as to reduce the impact on the user's ambient temperature during the defrost process. ST0: During defrost, the air conditioning water directly enters the water system circulation state (i.e., during defrost, the air conditioning water does not pass through the water tank).

[0064] 31) As shown in the logic judgment of the main control board in the figure, when the difference between the indoor temperature set by the user and the actual room temperature is ΔT≥A, the temperature difference is too large, so it takes a long time for the room temperature to rise. If the air-conditioning water flows through the water tank at this time, the water consumption and the room temperature will not quickly reach the user's satisfaction state. Therefore, the air-conditioning water does not pass through the water tank at this time, but directly enters the air-conditioning system circulation (i.e. ST1, the second control strategy), shortening the temperature rise time. ST1: The air-conditioning water directly enters the water system circulation state.

[0065] 32) When ΔT<A, the real-time load P of the whole machine is used to determine:

[0066] a) During cooling or heating, when there are fewer end users, that is, P≤a%, the real-time load is small, and the air-conditioning water should flow through the user and enter the water tank and finally enter the air-conditioning water system cycle through the three-way valve control, while meeting the user's set temperature and water demand (i.e. ST2);

[0067] b) When there are many end users and the demand is large, that is, when P ≥ b%, the real-time load is large and the compressor frequency increases. At this time, the air-conditioning water flows through the end user, through the three-way valve, across the water tank, and directly enters the air-conditioning water system circulation to achieve rapid cooling or heating (i.e., ST1). When ΔT < A, at this time, the user's temperature experience is basically met. After adjustment by the three-way valve, the air-conditioning water flows through the user and the water tank (i.e., ST2, the third control strategy) to meet the user's water demand. ST2: The air-conditioning water flows through the user and the water tank.

[0068] c) When a%<P<b%, the following is determined based on the temperature difference Δt between the inlet and outlet pipes:

[0069] c1) When Δt≤c, the temperature difference is small, which proves that the heat exchange is sufficient. Therefore, at this time, the air-conditioning water flows through the end user, through the water tank, and then enters the air-conditioning system circulation (i.e. ST2);

[0070] c2) When Δt≥d, the inlet and outlet water temperature difference is large, indicating that more heat exchange is required. At this time, the air-conditioning water directly returns to the air-conditioning system circulation through the end user (i.e., ST1);

[0071] c3) When c<Δt<d, the original operating state is maintained unchanged until Δt≤c, and then the water passes through the water tank to meet the user's water demand in time.

[0072] When the air conditioner is turned on, it should be continuously adjusted according to the real-time load and the inlet and outlet water temperature difference until the state is stable.

[0073] In the control strategy of the air conditioning water circuit of this embodiment, user comfort is given priority. The temperature in the room is first guaranteed. When the temperature is suitable, the water flows through the water tank and is adjusted in sections to improve user satisfaction and overall economy.

[0074] Example 4

[0075] Corresponds to Figure 2 The control method of the heat pump system described in the present embodiment provides a control device of the heat pump system, such as Figure 4 The structural block diagram of the control device of the heat pump system shown in FIG. 1 includes:

[0076] The acquisition module 10 is used to acquire the operation information of the heat pump system; wherein the operation information includes at least one of the following: whether to enter the defrosting state, the indoor temperature of the room where the air conditioner is located, the whole machine load, and the inlet and outlet water temperature difference of the heat pump system;

[0077] The control module 20 is connected to the acquisition module 10 and is used to control the on-off between the three-way valve and the first branch, the second branch, and the third branch according to the operation information.

[0078] This embodiment can implement the control scheme of the heat pump system introduced above, and comprehensively control the on-off of the three-way valve and the three branches according to the defrost status, indoor temperature, real-time load of the air conditioner and the inlet and outlet water temperature difference, adjust the air conditioning water flow path, give priority to increasing the indoor temperature, and then meet the user's water demand, thereby improving the energy saving of the unit, significantly improving energy utilization efficiency, reducing unnecessary waste, and improving user comfort and overall economy.

[0079] Example 5

[0080] This embodiment provides an electronic device, which is used in a control method of a heat pump system. The electronic device includes: at least one processor; and a memory connected to the at least one processor in communication; wherein:

[0081] The memory stores instructions that can be executed by the one processor, and the instructions are executed by the at least one processor so that the at least one processor can: obtain operating information of the heat pump system; wherein the operating information includes at least one of the following: whether to enter the defrost state, the indoor temperature of the room where the air conditioner indoor unit is located, the load of the whole machine, and the inlet and outlet water temperature difference of the heat pump system; and control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch according to the operating information.

[0082] Example 6

[0083] The embodiment of the present invention provides a software, which is used to execute the technical solutions described in the above embodiment and preferred implementation manner.

[0084] An embodiment of the present invention provides a non-volatile computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the control method of the heat pump system in any of the above method embodiments.

[0085] The above-mentioned software is stored in the above-mentioned storage medium, which includes but is not limited to: a CD, a floppy disk, a hard disk, an erasable memory, etc.

[0086] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0087] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0090] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0092] The above product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0093] The electronic devices of the embodiments of the present invention exist in various forms, including but not limited to:

[0094] (1) Mobile communication devices: These devices are characterized by their mobile communication functions and their main purpose is to provide voice and data communications. These terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.

[0095] (2) Ultra-mobile personal computer devices: These devices fall into the category of personal computers, have computing and processing capabilities, and generally also have mobile Internet access features. These terminals include: PDA, MID and UMPC devices, such as iPad.

[0096] (3) Portable entertainment devices: These devices can display and play multimedia content. They include audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys and portable car navigation devices.

[0097] (4) Server: A device that provides computing services. The server consists of a processor, hard disk, memory, device bus, etc. The server is similar to the general computer architecture, but because it needs to provide highly reliable services, it has higher requirements in terms of processing power, stability, reliability, security, scalability, manageability, etc.

[0098] (5) Other electronic devices with data interaction functions, such as televisions, large-screen cars, etc.

[0099] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat pump system, comprising an air conditioner outdoor unit, an air conditioner indoor unit, a water collector, and a water tank, characterized in that: The heat pump system further comprises a three-way valve, and: A first branch, a first end point of which is arranged in a water inlet pipeline between the air conditioner outdoor unit and the air conditioner indoor unit, and a second end point of which is communicated with the three-way valve; A second branch, a first end point of which is arranged on the return pipe between the water collector and the water tank, and a second end point of which is connected to the three-way valve; The third branch has a first end point arranged on the return water pipeline between the water tank and the air conditioner outdoor unit, and a second end point communicated with the three-way valve.

2. A control method for a heat pump system, applied to the heat pump system according to claim 1, characterized in that: The method comprises: Acquire the operation information of the heat pump system; wherein the operation information includes at least one of the following: whether to enter the defrosting state, the indoor temperature of the room where the air conditioner is located, the whole machine load, and the inlet and outlet water temperature difference of the heat pump system; The connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch are controlled according to the operation information.

3. The method according to claim 2, characterized in that Controlling the on-off between the three-way valve and the first branch and the second branch according to the operation information includes: determining whether the heat pump system has entered a defrosting state according to the operation information; If yes, execute the first control strategy to control the on-off between the three-way valve and the first branch, the second branch, and the third branch; wherein the first control strategy is to control the air-conditioning water to directly enter the water system circulation, and the air-conditioning water does not pass through the water tank; If not, a corresponding control strategy is further determined according to the temperature difference between the set temperature and the indoor temperature to control the on-off between the three-way valve and the first branch, the second branch, and the third branch.

4. The method according to claim 3, characterized in that Further, according to the temperature difference between the set temperature and the indoor temperature, a corresponding control strategy is determined to control the on-off between the three-way valve and the first branch, the second branch, and the third branch, including: If the temperature difference is ≥A, the second control strategy is executed to control the opening and closing between the three-way valve and the first branch, the second branch, and the third branch; wherein the second control strategy is to control the air-conditioning water to flow through the air-conditioning indoor unit and then enter the water system circulation, and the air-conditioning water does not pass through the water tank; A is a preset value; If the temperature difference is less than A, a corresponding control strategy is further determined according to the whole machine load to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch.

5. The method according to claim 4, characterized in that Further determining a corresponding control strategy according to the whole machine load to control the on-off between the three-way valve and the first branch, the second branch, and the third branch, including: If the whole machine load is ≤ a%, the third control strategy is executed to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch; wherein the third control strategy is to control the air conditioning water to flow through the air conditioner indoor unit and the water tank, and then enter the water system circulation; If the whole machine load is ≥ b%, a second control strategy is executed to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch; If a%<the whole machine load<b%, then further determine the corresponding control strategy according to the inlet and outlet water temperature difference to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch; Among them, a and b are preset values.

6. The method according to claim 5, characterized in that Further determining a corresponding control strategy according to the inlet and outlet water temperature difference to control the on-off between the three-way valve and the first branch, the second branch, and the third branch, including: If the inlet and outlet water temperature difference is ≤c%, a third control strategy is executed to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch; If the inlet and outlet water temperature difference is ≥ d%, a second control strategy is executed to control the opening and closing between the three-way valve and the first branch, the second branch, and the third branch; If c%<the whole machine load<d%, then maintain the current control strategy; Among them, c and d are preset values.

7. The method according to claim 3, characterized in that The first control strategy is to control the first branch to be opened, the second branch to be closed, and the third branch to be opened.

8. The method according to claim 4, characterized in that The second control strategy is to control the first branch to be closed, the second branch to be opened, and the third branch to be opened.

9. The method according to claim 5, characterized in that The third control strategy is to control the first branch to be closed, the second branch to be closed, and the third branch to be closed.

10. A control device for a heat pump system, used to implement the control method for a heat pump system according to any one of claims 2 to 9, characterized in that: The device comprises: An acquisition module, used for acquiring the operation information of the heat pump system; wherein the operation information includes at least one of the following: whether to enter the defrosting state, the indoor temperature of the room where the air conditioner is located, the whole machine load, and the inlet and outlet water temperature difference of the heat pump system; A control module is used to control the connection and disconnection between the three-way valve and the first branch, the second branch, and the third branch according to the operation information.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 2 to 9 is implemented.

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