Heat pump system

Abstract

The embodiment of the present application relates to the technical field of heat pump, and specifically provides a heat pump system, which comprises a compressor, a condenser, a throttling element and an evaporator, the condenser comprises multi-section condenser pipelines, wherein the compressor, the condenser, the throttling element and the evaporator form a working medium loop, and mixed working medium circulates in the working medium loop; wherein the heat pump system further comprises a regenerator, which can communicate with at least part of the multi-section condenser pipelines, so as to heat the low-pressure working medium in the working medium loop by using the working medium flowing through the at least part of the multi-section condenser pipelines. Through such a structure, on the one hand, the drying quality of the heat pump system can be improved in the early stage of drying by means of supplementary heating of the low-pressure working medium by the regenerator. On the other hand, the mixed working medium can improve the phase change temperature of the working medium, and thus can ensure the drying effect in the later stage of drying by means of fully recovering the heat in the air flow.

Description

Technical Field

[0001] This application relates to the field of heat pump technology, specifically providing a heat pump system. Background Technology

[0002] The basic working principle of a heat pump system (taking a heat pump dryer containing a heat pump system as an example) is as follows: after the high-temperature airflow dries clothes and other items in the target space such as the drying chamber, it is dehumidified by the evaporator. Then, the dehumidified and cooled airflow is heated by the condenser to become dry and high-temperature air again, which is then re-entered into the drying chamber to dry clothes. In this way, a circulating air path is formed in which the heat pump system can continuously provide high-temperature and dry airflow to the drying chamber.

[0003] Because the airflow in the circulating airflow path is a closed loop, the quality of the air supplied to the drying chamber often varies as drying progresses. For example, in the early stages of drying, the low condensing temperature of the heat pump system results in a low temperature in the drying chamber, preventing the moisture in the clothes from evaporating quickly and thus affecting the drying speed. Therefore, rapidly raising the airflow temperature becomes crucial for improving drying quality. In the later stages of drying, as the moisture in the clothes decreases, the air temperature at the drying chamber outlet rises, causing the evaporator temperature to increase accordingly. This reduces the evaporator's dehumidification capacity, limiting the dehumidification speed. It can be seen that current heat pump systems generally suffer from low initial condensing temperatures and high evaporation temperatures in the later stages, leading to performance issues such as slow drying speed and low efficiency.

[0004] One improvement is to use electric heating to increase the airflow temperature during the early stages of drying. However, this inevitably increases the energy consumption of the heat pump system, significantly reducing its energy-saving effect. More importantly, this approach still cannot solve the problem of high evaporation temperatures in the later stages of drying. Summary of the Invention

[0005] This application aims to solve at least part of the above-mentioned technical problems and / or at least part of the above-mentioned technical problems, specifically, the technical problem of how to improve the drying performance of a heat pump system as much as possible.

[0006] In view of this, this application provides a heat pump system comprising a compressor, a condenser, a throttling element, and an evaporator. The condenser includes multiple condenser pipes, wherein the compressor, the condenser, the throttling element, and the evaporator form a working fluid loop, and the working fluid circulating in the working fluid loop is a mixed working fluid. The heat pump system further includes a regenerator capable of communicating with at least a portion of the multiple condenser pipes to heat the low-pressure working fluid in the working fluid loop using the working fluid flowing through at least a portion of the multiple condenser pipes.

[0007] This configuration allows for several advantages. First, it enables the heat pump system to improve drying quality by supplementing the low-pressure working fluid with a regenerator during the initial drying stage. Second, compared to a single-component working fluid, the mixed working fluid, containing a high-boiling-point working fluid with a large boiling point difference and a low-boiling-point working fluid, increases the phase change temperature of the working fluid. This, in turn, allows for efficient heat recovery from the airflow during the later stages of drying, ensuring a better drying effect.

[0008] It is understood that those skilled in the art can determine, based on actual needs, the specific implementation method for connecting the regenerator to at least a portion of the multi-section condenser piping, the timing of connection to all or part (specific part) of the multi-section condenser piping, etc. For example, a portion of the multi-section condenser piping can be connected by adding an independent pipe, and appropriate valves can be configured for this independent pipe. Furthermore, those skilled in the art can determine, based on actual needs, the specific components of the high-boiling-point and low-boiling-point working fluids in the mixed working fluid, their ratio, and the difference in boiling points between them.

[0009] In one possible implementation of the heat pump system described above, the condenser includes a first condenser pipe and a second condenser pipe, and the regenerator is connected to the first condenser pipe and / or the second condenser pipe to heat the low-pressure working fluid in the working fluid circuit using the working fluid flowing through the first condenser pipe and / or the second condenser pipe.

[0010] This configuration provides possible combinations of multiple condenser piping sections, such as the first and second condenser piping sections being connected in series, in parallel, or in combinations with various connection methods such as parallel / series / interchange.

[0011] In one possible implementation of the heat pump system described above, the first condenser pipe and the second condenser pipe are connected in series with each other.

[0012] This configuration provides possible structural forms for the condenser. For example, the first and second condenser pipes can be the same or different. The way the two are connected in series to form a heat pump system (such as the specific connection method) can be flexibly selected according to actual needs.

[0013] In one possible implementation of the heat pump system described above, the heat pump system includes a control valve assembly that enables the regenerator to switch between a connected state and a disconnected state with the first condenser pipe and / or the second condenser pipe.

[0014] With this configuration, it is possible to switch the connection state between the regenerator and the first condenser piping and / or the second condenser piping through the control valve assembly.

[0015] It is understood that those skilled in the art can determine the number and type of control valves included in the control valve assembly, their location in the heat pump system, and the conditions and positions under which the connection between the regenerator and the first and / or second condenser piping can be switched, based on actual needs. For example, the connection between the regenerator and the first and / or second condenser piping includes two parts: one part can be switched by the control valve assembly, and the other part is a constant connection.

[0016] In one possible implementation of the above-described heat pump system, the control valve assembly includes a control valve, the regenerator includes a first regenerator line, a first end of the control valve is connected between the first condenser line and the second condenser line, a second end of the control valve is connected to a first side of the first regenerator line, and the second side of the first regenerator line is connected to the first side of the evaporator via the throttling element.

[0017] This configuration demonstrates possible ways in which control valve components can be incorporated into a heat pump system, such as the control valve being a solenoid valve.

[0018] In one possible implementation of the above-mentioned heat pump system, the compressor's exhaust port, after being connected to the first end of the first section of the condenser pipe, splits into a first working fluid branch and a second working fluid branch. The first and second working fluid branches merge and are sequentially connected to the throttling element, the evaporator, and the compressor's suction port, forming the working fluid circuit of the heat pump system. Specifically, the first working fluid branch includes: the second end of the first section of the condenser pipe connected to the first end of the first regenerator pipe via the control valve; and the second end of the first regenerator pipe connected to the throttling element. The second working fluid branch includes: the second end of the first section of the condenser pipe connected to the first end of the second section of the condenser pipe; and the second end of the second section of the condenser pipe connected to the throttling element.

[0019] This configuration demonstrates a possible arrangement of the working fluid circuit in a heat pump system. For example, the amount of working fluid flowing through the first regenerator pipe in the first working fluid circuit can be adjusted by regulating the opening of the control valve (e.g., 30%, 50%, 70%, etc.).

[0020] In one possible implementation of the above-mentioned heat pump system, the regenerator includes a second regenerator pipeline. After the first working fluid branch and the second working fluid branch merge, they are sequentially connected to the throttling element, the evaporator, the second regenerator pipeline, and the suction port of the compressor, thus forming the working fluid circuit of the heat pump system.

[0021] This configuration provides a specific structural form for the first working fluid circuit.

[0022] In one possible implementation of the aforementioned heat pump system, the heat pump system includes or is configured with a controller, the controller being used to: open the control valve so that: a portion of the working fluid circulates through the compressor's exhaust port - the first condenser line - the first working fluid branch - the throttling element - the evaporator - the second regenerator line - the compressor's suction port; and another portion of the working fluid circulates through the compressor's exhaust port - the first condenser line - the control valve - the second working fluid branch - the throttling element - the evaporator - the second regenerator line - the compressor's suction port.

[0023] This configuration provides the working fluid circulation mode of the heat pump system under operating conditions such as the early stage of drying. The controller can be installed on the heat pump system or controlled via a central control room, cloud-based control, or other methods to achieve mode control of the heat pump system.

[0024] Specifically, in this working fluid cycle, after a portion of the high-pressure working fluid has undergone heat exchange in the condenser (with the first condenser piping), it splits into two paths. One path (corresponding to the second working fluid branch) continues to exchange heat with air in the condenser, while the other path (corresponding to the first working fluid branch) enters the first regenerator piping of the regenerator through a control valve. This provides the high-pressure working fluid with the heat required for further heating and vaporization, thereby accelerating the temperature rise rate in the early stage of drying. After the two high-pressure working fluids merge, they are cooled and depressurized by a throttling element, becoming a low-pressure, low-temperature working fluid. This low-pressure, low-temperature working fluid exchanges heat with the humid air flow from the drying chamber in the evaporator, causing the humid air flow to precipitate moisture, thus dehumidifying it. Afterward, the low-pressure, low-temperature working fluid enters the second regenerator piping of the regenerator, absorbs the condensation heat of the high-pressure working fluid, and becomes a gaseous working fluid before entering the compressor through the compressor's suction port.

[0025] It is understandable that those skilled in the art can determine the specific opening degree of the control valve according to actual needs, such as a fixed opening degree or a dynamically adjustable opening degree.

[0026] In one possible implementation of the heat pump system described above, the controller is further configured to: close the control valve so that: the mixed working fluid circulates through the compressor's exhaust port - the first condenser line - the second condenser line - the throttling element - the evaporator - the second regenerator line - the compressor's suction port.

[0027] This configuration provides a working fluid circulation mode for a heat pump system under operating conditions such as the later stages of drying.

[0028] As the drying process continues, the moisture content of the dried material decreases, causing the temperature of the air exiting the drying chamber to rise continuously. Once the air enters the evaporator, it becomes difficult to lower the evaporation temperature, thus affecting the drying effect.

[0029] Specifically, in the later stages of drying, the moisture content in the clothes and other items waiting to be dried continuously decreases, causing the temperature of the airflow exiting the drying chamber to rise continuously. Once it reaches the evaporator, it becomes difficult to lower the evaporation temperature. Therefore, in this mode, the control valve is closed, and the high-pressure working fluid is no longer split into two paths in the condenser.

[0030] In one possible implementation of the heat pump system described above, the heat pump system includes a regulating tank, to which the mixed working fluid circulating in the working fluid loop of the heat pump system can be transferred; and / or the working fluid in the regulating tank can be added to the low-pressure side of the working fluid loop of the heat pump system.

[0031] This configuration allows for the improvement of the drying performance of the heat pump system by adjusting the quantity and composition ratio of the mixed working fluid. For example, the timing and amount of transferring the mixed working fluid from the outlet to the regulating tank, and the quantity, timing, location, and composition ratio of adding the mixed working fluid to the working fluid loop can be determined based on actual needs. This can also be achieved by configuring appropriate control valves. Attached Figure Description

[0032] The preferred embodiments of this application will now be described with reference to the accompanying drawings, in which:

[0033] Figure 1 This application shows a schematic diagram of the structure of a heat pump system according to one embodiment. Figure 1 ;as well as

[0034] Figure 2 This application shows a schematic diagram of the structure of a heat pump system according to one embodiment. Figure 2 The diagram shows the regulating tank.

[0035] List of reference numerals in the attached diagram:

[0036] 100. Heat pump system;

[0037] 1. Compressor;

[0038] 2. Condenser;

[0039] 21. First section of condenser piping; 22. Second section of condenser piping;

[0040] 3. Throttling element;

[0041] 4. Evaporator;

[0042] 5. Regenerator;

[0043] 51. First regenerator piping; 52. Second regenerator piping;

[0044] 6. Control valve;

[0045] 7. Regulating tank;

[0046] 71. Turn out the regulating valve;

[0047] 721. First replenishment regulating valve; 722. Second replenishment regulating valve;

[0048] 8. Drying chamber;

[0049] 9. Fan

[0050] 10. Clothing. Detailed Implementation

[0051] Preferred embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. For example, in this example, the location where the mixed working fluid is added is the location of the working fluid circuit corresponding to the compressor's suction port. Obviously, the location for adding the mixed working fluid could also be other locations on the low-pressure side of the working fluid circuit. Furthermore, the gaseous and liquid components of the mixed working fluid can be added to the same location or to different locations.

[0052] It should be noted that in the description of this application, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, the principles of heat pump systems well-known to those skilled in the art are not described in detail, in order to highlight the main points of this application.

[0055] In this application, on the one hand, the condenser in a traditional heat pump system is designed in sections, and on this basis, a control valve and a regenerator are added; on the other hand, the single-component working fluid is replaced with a mixed working fluid. The following description, in conjunction with the accompanying drawings, illustrates how this application improves the drying performance of the heat pump system.

[0056] Main reference Figure 1 and Figure 2In one possible implementation, the heat pump system 100 mainly includes a compressor 1, a condenser 2, a throttling element (such as an electronic expansion valve) 3, an evaporator 4, and a regenerator 5. The internal piping of the condenser 2 includes a first condenser pipe 21 and a second condenser pipe 22 connected in series. The internal piping of the regenerator 5 includes a first regenerator pipe 51 and a second regenerator pipe 52 capable of heat exchange. Taking a heat pump dryer as an example, if the dryer includes a drying chamber 8, the heat-carrying airflow inside the drying chamber can dry the clothes 10 awaiting drying. The heat pump system mainly increases the temperature of the airflow by exchanging heat with the condenser and dehumidifies the airflow by exchanging heat with the evaporator. In this way, a circulating hot airflow can be provided to the drying chamber under the guidance of the fan 9. The specific structure of the heat pump system is as follows:

[0057] The compressor's discharge port is connected to the first end of the first condenser pipe, the second end of the first condenser pipe is connected to the first end of the second condenser pipe, the second end of the second condenser pipe is connected to the first end of the throttling device, the second end of the throttling device is connected to the first end of the evaporator, the second end of the evaporator is connected to the first end of the second regenerator pipe, and the second end of the second regenerator pipe is connected to the compressor's suction port.

[0058] The first end of the first regenerator pipe is connected to the node between the first condenser pipe and the second condenser pipe, and the second end of the first regenerator pipe is connected to the first end of the throttling component.

[0059] In one possible implementation, the heat pump system 100 further includes a control valve assembly. In this example, the control valve assembly includes a control valve 6. A first end of the control valve 6 is connected to a node between the first condenser line 21 and the second condenser line 22, and a second end of the control valve is connected to a first end of the first regenerator line. Alternatively, the control valve 6 is positioned in the working fluid line between the node between the first and second condenser lines and the first regenerator line. This allows the circulation mode of the mixed working fluid within the heat pump system to be adjusted by switching the on / off state of the control valve and by adjusting the specific opening degree of the control valve.

[0060] (1) When control valve 6 is open, the compressor's exhaust port, after being connected to the first end of the first section of the condenser pipeline, splits into a first working fluid branch and a second working fluid branch. The first and second working fluid branches merge and are sequentially connected to the throttling element, the evaporator, and the compressor's suction port, forming a working fluid circuit. Wherein:

[0061] The first working fluid branch includes: the second end of the first condenser pipeline is connected to the first end of the first regenerator pipeline via a control valve, and the second end of the first regenerator pipeline is connected to the first end of the throttling element;

[0062] The second working fluid branch includes: the second end of the first condenser pipe is connected to the first end of the second condenser pipe, and the second end of the second condenser pipe is connected to the first end of the throttling element.

[0063] Based on this, the amount of mixed working fluid flowing through the first regenerator pipeline can be adjusted by regulating the specific opening degree of the control valve in the connected state. On this basis, it is expected that the condensation heat in the first regenerator pipeline can be used to fully heat the low-pressure working fluid entering the second regenerator pipeline, thereby ensuring the working fluid circulation quality of the heat pump system and ensuring the temperature rise rate of the heat pump system in the early stage of drying.

[0064] (2) When the control valve 6 is closed, the compressor discharge port is connected to the first end of the first condenser pipeline, the second end of the first condenser pipeline is connected to the first end of the second condenser pipeline, the second end of the second condenser pipeline is connected to the first end of the throttling element, the second end of the throttling element is connected to the first end of the evaporator, the second end of the evaporator is connected to the first end of the second regenerator pipeline, and the second end of the second regenerator pipeline is connected to the compressor suction port.

[0065] In this situation, since there is no recoverable condensation heat in the first regenerator pipes, the second regenerator pipes are essentially a closed loop. To address the issue of high evaporation temperatures in the later stages of drying with heat pump systems, this application introduces a mixed working fluid.

[0066] In a preferred embodiment of this application, the mixed working fluid is a working fluid with a large boiling point difference. For example, the mixed working fluid typically includes at least two working fluids. During condensation and phase change, the phase change temperature of the mixed working fluid can reach over 70°C, decreasing to 20°C. Specifically, the low-boiling-point working fluid in the mixed working fluid can be R290, R1270, or other working fluids with a normal-pressure boiling point ≤ -20°C, while the high-boiling-point working fluid can be R600a, pentane, or other working fluids with a normal-pressure boiling point greater than -20°C. The molar concentration of the low-boiling-point working fluid is ≥ 50%. This large phase change temperature variation can match the temperature rise of the airflow required by the heat pump system during the drying process. For example, the temperature of the airflow after dehumidification by the evaporator is 20-30°C, while the temperature of the airflow after heating by the condenser can rise to over 70°C. It can be seen that the temperature rise of the airflow (taking 20°C as an example, from 20°C to 70°C) is large. Specifically, conventional working fluids are isothermal condensers (such as working fluids with constant heating at 75°C and temperature variations), resulting in large heat exchange temperature differences and significant irreversible heat losses. In this application, a mixed working fluid with a phase change temperature glide is used, such as a condensation phase change temperature that can change from 70°C to 30°C. This allows the changing condensation temperature to better match the heating temperature rise of the air, thereby reducing irreversible heat losses due to the heat exchange temperature difference and thus improving the efficiency of the heat pump system.

[0067] In the early stage of drying, the temperature of the airflow reaching the evaporator is low (around 30°C), which cannot reliably heat the mixed working fluid at the evaporator outlet to make it gaseous before it enters the compressor. Therefore, in this application, a regenerative method is used to further heat the working fluid.

[0068] In one possible implementation, the heat pump system 100 also includes a regulating tank 7, the inlet of which is connected to the node between the first condenser line and the second condenser line, and thus recovers / transfers a portion of the mixed working fluid from the working fluid circuit. The outlet of the regulating tank 7 is connected to the low-pressure side of the working fluid circuit of the heat pump system, and thus replenishes the working fluid circuit with the mixed working fluid.

[0069] In this example, the regulating tank 7 is equipped with a discharge regulating valve 71 on the pipeline between its inlet and the working fluid circuit. When it is necessary to recover the mixed working fluid, the discharge regulating valve 71 can be opened. The regulating tank 7 is equipped with a first replenishment regulating valve 721 and a second replenishment regulating valve 722 on the pipeline between its outlet and the low-pressure side of the working fluid circuit (in this example, the location corresponding to the compressor's suction port in the working fluid pipeline). The gaseous portion of the mixed working fluid in the regulating tank 7 is replenished to the low-pressure side of the working fluid circuit via the first replenishment regulating valve 721, and the liquid portion of the mixed working fluid in the regulating tank 7 is replenished to the low-pressure side of the working fluid circuit via the second replenishment regulating valve 722. Thus, when it is necessary to replenish the working fluid circuit, the first replenishment regulating valve and / or the second replenishment regulating valve can be opened. If the gaseous portion of the working fluid has a high content of low-boiling-point working fluid, and the liquid portion of the working fluid has a high content of high-boiling-point working fluid, by adjusting the on / off state and specific opening degree of the two feed regulating valves, it is hoped that the mixed working fluid currently circulating in the heat pump system can be better adapted to the drying needs of the heat pump system.

[0070] In the later stages of drying, the temperature of the airflow reaching the evaporator is high (up to 60°C). If this heat is not recovered / utilized, this high-temperature airflow will absorb the cooling energy of the working fluid, resulting in poor dehumidification of the heat pump system. In this application, this heat is used to heat the mixed working fluid, allowing it to become gaseous before compression. This eliminates the need for a regenerator to reheat the working fluid, fully utilizing the waste heat of the high-temperature airflow, ensuring the quality of the mixed working fluid, and improving the efficiency of the heat pump system.

[0071] In traditional heat pump systems, the airflow used for drying and dehumidification is an internal circulation system. The ideal drying effect is to maximize the temperature of the heated airflow and minimize the temperature of the dehumidified airflow, thus ensuring the drying speed of the heat pump system. For a heat pump system, this means a high condensing temperature and a low evaporating temperature. However, because the heat pump system cannot fully exchange heat with the external ambient air, most of the heat for condensation and evaporation comes from the internally circulating air. Consequently, when the temperature of the internally circulating airflow is low, the humidity (e.g., relative humidity) of the airflow at the condenser outlet is high, resulting in lower drying efficiency (although the evaporator dehumidification effect is better). Conversely, when the temperature of the internally circulating airflow is high, the relative humidity of the airflow at the condenser outlet is low, resulting in higher drying efficiency, but poorer dehumidification. It can be seen that current heat pump systems cannot simultaneously achieve both drying and dehumidification efficiency, which limits the drying speed and energy-saving potential of the entire drying process.

[0072] In this way, during the initial drying stage, the airflow from the drying chamber 8 reaching the evaporator is at a relatively low temperature (e.g., around 30°C), which is insufficient to effectively heat the mixed working fluid (low-pressure working fluid) at the evaporator outlet (second end). In this application, by drawing out a portion of the mixed working fluid and using the condensation heat recovered from this portion to supplement the heating of the low-pressure working fluid at the evaporator outlet, the low-pressure working fluid is converted into a gaseous state and enters the compressor, thereby ensuring the circulation quality of the working fluid and thus guaranteeing the temperature rise rate of the heat pump system during the initial drying stage.

[0073] In the later stages of drying, the airflow from the drying chamber 8 reaches a high temperature (up to 60°C) and arrives at the evaporator. If this heat is not absorbed, the heated airflow will absorb the cooling energy of the working fluid within the evaporator, resulting in poor dehumidification. In this application, firstly, the aforementioned heat recovery method is eliminated; that is, the method of recovering condensation heat to heat the working fluid in the evaporator is no longer used. Simultaneously, compared to a single-component working fluid, the phase change temperature of the mixed working fluid used in this application is adapted to the current operating conditions. That is, it can fully absorb the heat carried by the currently high-temperature airflow, transform into a gaseous state, and enter the compressor, thereby ensuring the circulation quality of the working fluid and thus guaranteeing the dehumidification effect of the heat pump system in the later stages of drying. The composition / ratio / amount of the mixed working fluid circulating in the working fluid loop can be adjusted according to actual needs to better guarantee the dehumidification effect of the heat pump system in the later stages of drying.

[0074] As can be seen, in the preferred embodiment of this application, based on the traditional heat pump system, the piping inside the condenser is first designed in sections. Then, by adding a control valve and a regenerator, the temperature rise rate of the heat pump system in the early stage of drying is improved. By replacing the single-component working fluid with a mixed working fluid, the phase change temperature of the working fluid is increased, and the evaporation temperature of the heat pump system in the later stage of drying is reduced (to match the temperature rise of the air during the drying process), thereby improving the drying quality of the heat pump system.

[0075] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A heat pump system, characterized in that, The heat pump system includes a compressor, a condenser, a throttling element, and an evaporator. The condenser includes multiple sections of condenser piping. The compressor, the condenser, the throttling element, and the evaporator form a working fluid loop, and the working fluid circulating in the working fluid loop is a mixed working fluid. The heat pump system further includes: A regenerator, which is connected to at least a portion of the multiple condenser piping, so as to: The low-pressure working fluid in the working fluid circuit is heated by using at least a portion of the working fluid flowing through the multi-section condenser piping.

2. The heat pump system according to claim 1, characterized in that, The condenser includes a first section of condenser piping and a second section of condenser piping, and the regenerator is capable of communicating with the first section of condenser piping and / or the second section of condenser piping so as to: The low-pressure working fluid in the working fluid circuit is heated by the working fluid flowing through the first section of the condenser pipeline and / or the second section of the condenser pipeline.

3. The heat pump system according to claim 2, characterized in that, The first section of the condenser piping and the second section of the condenser piping are connected in series.

4. The heat pump system according to claim 3, characterized in that, The heat pump system includes a control valve assembly that enables the regenerator to switch between a connected state and a disconnected state with the first condenser pipe and / or the second condenser pipe.

5. The heat pump system according to claim 4, characterized in that, The control valve assembly includes a control valve, and the regenerator includes a first regenerator piping. The first end of the control valve is connected between the first section of the condenser piping and the second section of the condenser piping, and the second end of the control valve is connected to the first side of the first regenerator piping. The second side of the first regenerator pipe is connected to the first side of the evaporator via the throttling element.

6. The heat pump system according to claim 5, characterized in that, After the compressor's exhaust port is connected to the first end of the first section of the condenser piping, it splits into a first working fluid branch and a second working fluid branch. The first and second working fluid branches merge and are then sequentially connected to the throttling element, the evaporator, and the compressor's suction port, forming the working fluid circuit of the heat pump system. The first working fluid branch includes: the second end of the first condenser pipe is connected to the first end of the first regenerator pipe via the control valve, and the second end of the first regenerator pipe is connected to the throttling element; The second working fluid branch includes: the second end of the first condenser pipe is connected to the first end of the second condenser pipe, and the second end of the second condenser pipe is connected to the throttling element.

7. The heat pump system according to claim 6, characterized in that, The regenerator includes a second regenerator piping. After the first working fluid branch and the second working fluid branch merge, they are sequentially connected to the throttling element, the evaporator, the second regenerator pipeline, and the suction port of the compressor, thus forming the working fluid circuit of the heat pump system.

8. The heat pump system according to claim 7, characterized in that, The heat pump system includes or is configured with a controller, the controller being used for: The control valve is opened so that: A portion of the mixed working fluid circulates through the compressor's exhaust port - the first section of the condenser pipeline - the first working fluid branch - the throttling element - the evaporator - the second regenerator pipeline - the compressor's suction port; Another portion of the mixed working fluid circulates through the compressor's exhaust port - the first section of the condenser pipeline - the control valve - the second working fluid branch - the throttling element - the evaporator - the second regenerator pipeline - the compressor's suction port.

9. The heat pump system according to claim 8, characterized in that, The controller is also used for: The control valve is closed so that: The mixed working fluid circulates through the compressor's exhaust port, the first condenser pipeline, the second condenser pipeline, the throttling element, the evaporator, the second regenerator pipeline, and the compressor's suction port.

10. The heat pump system according to claim 1, characterized in that, The heat pump system includes a regulating tank, to which a mixed working fluid circulating in the working fluid loop of the heat pump system can be removed; and / or The mixed working fluid in the regulating tank can be added to the low-pressure side of the working fluid circuit of the heat pump system.

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