Heat pump device

Abstract

The utility model provides a heat pump device which comprises a first heat exchanger and a second heat exchanger. A first communicating pipeline; a balance tank; one end of the first adjusting pipeline is communicated with the balance tank, the other end of the first adjusting pipeline is communicated with the first communicating pipeline, a first throttling element is arranged on the first adjusting pipeline, and the first throttling element can reduce the flow speed of a refrigerant in the first adjusting pipeline; one end of the second adjusting pipeline communicates with the balance tank, the other end of the second adjusting pipeline communicates with the first communicating pipeline, the first adjusting pipeline and the second adjusting pipeline are arranged in parallel, a one-way flowing element is arranged on the second adjusting pipeline, and the one-way flowing element can make the refrigerant flow to the balance tank from the first communicating pipeline in a one-way mode. According to the technical scheme, the problem that a balance tank connecting device in the prior art cannot meet the requirements that a refrigerant stored in the balance tank is gradually released into the refrigerant-secondary refrigerant heat exchanger and redundant refrigerant in the refrigerant-secondary refrigerant heat exchanger is rapidly stored into the balance tank at the same time can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump device technical field, specifically, relate to a kind of heat pump device. BACKGROUND

[0002] In heat pump device, especially in air source heat pump device, the volume of evaporator and condenser is generally different, and when mode switching, the balance tank needs to store or supplement the excess refrigerant to the system. In the prior art, the balance tank is usually connected to the side of the heat exchanger with smaller volume by connecting pipe to ensure the normal and efficient operation of the heat pump device.

[0003] In variable frequency air source heat pump water heater, the volume of refrigerant-carrying medium heat exchanger is small, and when switching from heating condition to reverse defrosting condition, the refrigerant stored in the balance tank needs to be gradually released into the refrigerant-carrying medium heat exchanger to avoid excessive backflow; and when switching from reverse defrosting condition to heating condition, the excess refrigerant in the refrigerant-carrying medium heat exchanger needs to be quickly stored in the balance tank to avoid high pressure or difficulty in quick loading of the variable frequency compressor; but the connection mode of the balance tank in the prior art cannot meet the above requirements at the same time. SUMMARY

[0004] The utility model provides a kind of heat pump device to solve the problem that the connection mode of the balance tank in the prior art cannot meet the requirement that the refrigerant stored in the balance tank is gradually released into the refrigerant-carrying medium heat exchanger and the excess refrigerant in the refrigerant-carrying medium heat exchanger is quickly stored in the balance tank at the same time.

[0005] The utility model provides a kind of heat pump device, heat pump device includes: first heat exchanger and second heat exchanger;First communication pipeline, one end of first communication pipeline is communicated with the first pipeline of first heat exchanger, and the other end of first communication pipeline is communicated with the first pipeline of second heat exchanger;Balance tank;First regulating pipeline, one end of first regulating pipeline is communicated with balance tank, and the other end of first regulating pipeline is communicated with first communication pipeline, and first regulating pipeline is provided with first throttling element, and first throttling element can reduce the refrigerant flow rate in first regulating pipeline;Second regulating pipeline, one end of second regulating pipeline is communicated with balance tank, and the other end of second regulating pipeline is communicated with first communication pipeline, and first regulating pipeline and second regulating pipeline are connected in parallel, and second regulating pipeline is provided with one-way flow element, and one-way flow element can make refrigerant one-way flow from first communication pipeline to balance tank.

[0006] Further, the first throttling element is one or more of a capillary tube, a throttling hole, a throttling plate, and an electronic expansion valve.

[0007] Further, the one-way flow element is one or more of a one-way valve, a solenoid valve, and an electric ball valve.

[0008] Further, the heat pump device comprises: a first manifold pipe, one end of the first manifold pipe being in communication with the balance tank, the other end of the first manifold pipe being in communication with the first regulating pipe and the second regulating pipe; a second manifold pipe, one end of the second manifold pipe being in communication with the first regulating pipe and the second regulating pipe, the other end of the second manifold pipe being in communication with the first communication pipe.

[0009] Further, the heat pump device comprises a plurality of first regulating pipes and / or a plurality of second regulating pipes.

[0010] Further, a second throttling element is arranged on the first communication pipe, the second throttling element being arranged between the first heat exchanger and the second manifold pipe.

[0011] Further, a first filter and a second filter are arranged on the first communication pipe, the first filter being arranged between the second manifold pipe and the second heat exchanger, the second filter being arranged between the first heat exchanger and the second throttling element.

[0012] Further, the heat pump device further comprises a compressor and a gas-liquid separator, an exhaust port of the gas-liquid separator being in communication with a suction port of the compressor; a four-way reversing valve, a C port of the four-way reversing valve being in communication with a second pipe of the first heat exchanger, a D port of the four-way reversing valve being in communication with an exhaust port of the compressor, an E port of the four-way reversing valve being in communication with a second pipe of the second heat exchanger, and an S port of the four-way reversing valve being in communication with a suction port of the gas-liquid separator.

[0013] Further, the second heat exchanger is a compact heat exchanger.

[0014] The technical scheme of the utility model discloses the connecting device of balance tank is the first adjusting pipeline and the second adjusting pipeline of parallel arrangement, is provided with the first throttling element on the first adjusting pipeline, is provided with the one-way flow element on the second adjusting pipeline, the first throttling element can two-way flow, and the one-way flow element unidirectional conduction.Such setting, when the refrigerant needs from the second heat exchanger and enters the balance tank storage, can enter the balance tank through the first throttling element and the one-way flow element fast, guarantees that the system high pressure does not overpressure, when the refrigerant needs from the balance tank and enters the first communicating pipeline, only can from the first throttling element to the system with suitable speed and supplement refrigerant.Therefore, adopt above-mentioned structure, can realize the fast in and slow out of refrigerant to the balance tank, can make the heat pump device when the mode switching such as reverse defrosting, guarantee with suitable speed and supplement refrigerant to the system, avoid the refrigerant fast and supplement to the system, further can avoid the refrigerant fast and enter the gas-liquid separator and compressor, can guarantee the defrosting efficiency, simultaneously can improve the reliability of heat pump device, and can make the refrigerant in the system fast and enter the balance tank and store, can avoid the system high pressure too high, makes the compressor can fast and load, guarantees the normal work of heat pump device.Further, in the application, through the fine adjustment of the speed of refrigerant in and out, more effectively control the pressure and temperature of heat pump device, thereby optimize the utilization of energy, reduce the energy consumption, improve the energy efficiency ratio of whole system. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application given below, serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0016] Figure 1 The structure schematic view of the heat pump device provided by the utility model is shown.

[0017] Among them, the above drawing includes the following sign:

[0018] 11, first heat exchanger, 12, second heat exchanger,

[0019] 20, first communicating pipeline, 21, second throttling element, 22, first filter, 23, second filter,

[0020] 30, balance tank,

[0021] 40, first adjusting pipeline, 41, first throttling element,

[0022] 50, second adjusting pipeline, 51, one-way flow element,

[0023] 61, first collecting pipeline, 62, second collecting pipeline,

[0024] 70. Compressor;

[0025] 80. Gas-liquid separator;

[0026] 90. Four-way directional valve; 91. Port C; 92. Port D; 93. Port E; 94. Port S. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] like Figure 1 As shown, this embodiment of the present invention provides a heat pump device, which includes a first heat exchanger 11, a second heat exchanger 12, a first connecting pipe 20, a balance tank 30, a first regulating pipe 40, and a second regulating pipe 50. One end of the first connecting pipe 20 is connected to the first pipe of the first heat exchanger 11, and the other end of the first connecting pipe 20 is connected to the first pipe of the second heat exchanger 12. One end of the first regulating pipe 40 is connected to the balance tank 30, and the other end of the first regulating pipe 40 is connected to the first connecting pipe 20. A first throttling element 41 is provided on the first regulating pipe 40, which can reduce the refrigerant flow rate in the first regulating pipe 40. One end of the second regulating pipe 50 is connected to the balance tank 30, and the other end of the second regulating pipe 50 is connected to the first connecting pipe 20. The first regulating pipe 40 and the second regulating pipe 50 are arranged in parallel. A one-way flow element 51 is provided on the second regulating pipe 50, which allows the refrigerant to flow unidirectionally from the first connecting pipe 20 to the balance tank 30. In this application, the first heat exchanger 11 is a refrigerant-air heat exchanger, and the second heat exchanger 12 is a refrigerant-coolant heat exchanger. The fluid in the first pipe of the first heat exchanger 11 and the first pipe of the second heat exchanger 12 is mainly liquid.

[0029] Using the technical solution of this application, the connection device of the balance tank 30 consists of a first regulating pipe 40 and a second regulating pipe 50 arranged in parallel. The first regulating pipe 40 is equipped with a first throttling element 41, and the second regulating pipe 50 is equipped with a unidirectional flow element 51. The first throttling element 41 allows bidirectional flow, while the unidirectional flow element 51 allows unidirectional flow. With this configuration, when refrigerant needs to enter the balance tank 30 from the second heat exchanger 12, it can quickly enter the balance tank 30 through the first throttling element 41 and the unidirectional flow element 51, ensuring that the system high pressure does not exceed the limit. When refrigerant needs to enter the first connecting pipe 20 from the balance tank 30, refrigerant can only be replenished to the system at an appropriate rate through the first throttling element 41. Therefore, by adopting the above structure, the refrigerant can be fed quickly into the balance tank 30 and discharged slowly. This ensures that the heat pump device replenishes the system with refrigerant at an appropriate rate during mode switching such as reverse defrosting, avoiding rapid replenishment of refrigerant into the system. This prevents refrigerant from rapidly entering the gas-liquid separator 80 and compressor 70, thus ensuring defrosting efficiency and improving the reliability of the heat pump device. Furthermore, it allows the refrigerant in the system to quickly enter the balance tank 30 for storage, preventing excessively high system pressure and enabling the compressor 70 to load quickly, ensuring the normal operation of the heat pump device. In this application, by finely adjusting the refrigerant's inflow and outflow rate, the pressure and temperature of the heat pump device are more effectively controlled, thereby optimizing energy utilization, reducing energy consumption, and improving the overall system's energy efficiency ratio.

[0030] like Figure 1 As shown, solid arrows indicate the refrigerant flow direction during the refrigeration cycle and reverse defrost cycle, while hollow arrows indicate the refrigerant flow direction during the heating cycle. Specifically, during refrigeration operation, the first heat exchanger 11 acts as the high-pressure side, while the balance tank 30 is connected to the low-pressure side. Refrigerant from the balance tank 30 is replenished into the system for circulation. During heating operation, the second heat exchanger 12 acts as the high-pressure side. Due to its relatively small internal volume, the refrigerant in the system needs to be stored in the balance tank 30. If the inflow rate is too slow, the system's high-pressure may exceed the operating range. In winter, during heating operation, the first heat exchanger 11 will frost over, affecting the continuous and efficient operation of the heat pump; therefore, defrosting measures are necessary. The so-called defrosting mode means that in the heating mode, the first heat exchanger 11 is used as an evaporator. In the low temperature environment of winter, the first heat exchanger 11 will frost up. At this time, the four-way reversing valve 90 is switched to the cooling mode, that is, the first heat exchanger 11 is used as a condenser. The second heat exchanger 12 changes from high pressure to low pressure, and the liquid refrigerant inside it enters the gas-liquid separator 80 and the compressor 70. The high temperature and high pressure gaseous refrigerant at the outlet of the compressor 70 is used for defrosting. After defrosting is completed, the operation is switched back from the cooling mode to the heating mode. Reverse cycle defrosting is a highly efficient defrosting method.

[0031] Specifically, the first throttling element 41 is formed by combining one or more of the following: a capillary tube, a throttling orifice, a throttling plate, and an electronic expansion valve. This configuration reduces the refrigerant flow rate, minimizes ineffective refrigerant circulation within the system, and lowers energy consumption, thereby improving the overall energy efficiency of the heat pump unit. Furthermore, when the first throttling element 41 is composed of multiple structures, various combinations allow for more precise adjustment of the refrigerant flow rate when entering and exiting the balance tank 30, ensuring that the "fast in, slow out" mechanism of the refrigerant is achieved under different operating conditions, thus improving the system's response speed and control accuracy. Operators can select the specific structure of the first throttling element 41 according to their needs and specific application scenarios.

[0032] Furthermore, the unidirectional flow element 51 is composed of one or more of a check valve, a solenoid valve, and an electric ball valve. This configuration ensures that the refrigerant can only flow from the second heat exchanger 12 to the balance tank 30, preventing abnormal system pressure caused by backflow and guaranteeing the safe operation of the heat pump unit. Simultaneously, this unidirectional flow characteristic accelerates the refrigerant storage process and improves defrosting efficiency. When the check valve is used as the unidirectional flow element 51, it is simple, reliable, and easy to assemble. When the solenoid valve or electric ball valve is used as the unidirectional flow element 51, it controls the unidirectional flow element 51 to open when the refrigerant enters the balance tank 30 and to close when the refrigerant exits the balance tank 30, improving the automation level of the unidirectional flow element 51. This allows operators to select the specific structure of the unidirectional flow element 51 according to requirements and specific application scenarios, enhancing the adaptability and flexibility of the heat pump unit.

[0033] In other embodiments, when refrigerant needs to be replenished from the balance tank 30 to the system, the replenishment rate of the refrigerant can be precisely adjusted by controlling the opening state of the solenoid valve or the electric ball valve, so as to avoid the compressor 70 having difficulty starting due to excessive refrigerant or excessively high pressure on the high-pressure side.

[0034] The heat pump unit includes a first manifold 61 and a second manifold 62. One end of the first manifold 61 is connected to the balance tank 30, and the other end is connected to the first regulating pipe 40 and the second regulating pipe 50. One end of the second manifold 62 is connected to the first regulating pipe 40 and the second regulating pipe 50, and the other end is connected to the first connecting pipe 20. This configuration, through the introduction of the first manifold 61 and the second manifold 62, allows the system to distribute refrigerant flow more flexibly. It ensures uniform refrigerant distribution during normal operation and enables rapid and orderly refrigerant flow between components during operating condition switching, such as reverse defrosting, thus improving the flexibility and response speed of the heat pump unit. Furthermore, the use of the first manifold 61 and the second manifold 62 facilitates the assembly of the first regulating pipe 40 and the second regulating pipe 50, making operation convenient.

[0035] Furthermore, the heat pump device includes multiple first regulating pipes 40 or multiple second regulating pipes 50. In other embodiments, the heat pump device includes multiple first regulating pipes 40 and multiple second regulating pipes 50. This configuration, with multiple regulating pipes operating in parallel, allows for more precise regulation of the refrigerant storage and release process within the system, particularly during mode switching, ensuring a more efficient "fast in, slow out" refrigerant mechanism and preventing drastic fluctuations in system pressure. Moreover, this configuration facilitates system maintenance; when one regulating pipe requires maintenance, the remaining regulating pipes can continue operating normally, ensuring the heat pump device's continuous operation during critical periods.

[0036] Specifically, a second throttling element 21 is provided on the first connecting pipe 20, and the second throttling element 21 is located between the first heat exchanger 11 and the second manifold 62. This arrangement allows the second throttling element 21 to further refine the control of the refrigerant flow rate. This precise flow rate regulation helps maintain the pressure balance within the entire system, preventing abnormal increases in the high-pressure side pressure or abnormal decreases in the low-pressure side pressure due to excessively rapid refrigerant flow, ensuring that the heat pump unit maintains a stable pressure state under any operating condition.

[0037] The first connecting pipe 20 is equipped with a first filter 22 and a second filter 23. The first filter 22 is located between the second manifold 62 and the second heat exchanger 12, and the second filter 23 is located between the first heat exchanger 11 and the second throttling element 21. This arrangement allows the first filter 22 and the second filter 23 to effectively remove impurities and particles from the refrigerant, protecting critical components in the system from blockage or wear, and significantly improving the operational reliability and lifespan of the heat pump unit.

[0038] Furthermore, the heat pump unit also includes a compressor 70, a gas-liquid separator 80, and a four-way reversing valve 90. The exhaust port of the gas-liquid separator 80 is connected to the suction port of the compressor 70. Port C 91 of the four-way reversing valve 90 is connected to the second pipe of the first heat exchanger 11, port D 92 of the four-way reversing valve 90 is connected to the exhaust port of the compressor 70, port E 93 of the four-way reversing valve 90 is connected to the second pipe of the second heat exchanger 12, and port S 94 of the four-way reversing valve 90 is connected to the suction port of the gas-liquid separator 80. The fluid in the second pipe of the first heat exchanger 11 and the second pipe of the second heat exchanger 12 is mainly gas. This configuration allows the system to switch quickly and smoothly between heating, cooling, and reverse defrosting modes. The gas-liquid separator 80 ensures that the refrigerant entering the compressor 70 is in a gaseous state, avoiding the "liquid slugging" phenomenon in the compressor 70 caused by liquid refrigerant, reducing wear on the compressor 70, and significantly improving the service life of the compressor 70 and the overall reliability of the system.

[0039] Specifically, the second heat exchanger 12 is a compact heat exchanger. This design reduces the installation space required for the heat pump unit, facilitates integration and installation, and improves the heat exchange efficiency between the refrigerant and the secondary refrigerant, thereby enhancing the overall performance of the heat pump unit.

[0040] Optionally, the second heat exchanger 12 is a plate heat exchanger, and the refrigerant can be water.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0043] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0044] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0045] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat pump device, characterized in that, The heat pump device includes: First heat exchanger (11) and second heat exchanger (12); The first connecting pipe (20) has one end connected to the first pipe of the first heat exchanger (11) and the other end connected to the first pipe of the second heat exchanger (12). Balance tank (30); A first regulating pipe (40) is provided, one end of which is connected to the balance tank (30), and the other end of which is connected to the first connecting pipe (20). A first throttling element (41) is provided on the first regulating pipe (40), and the first throttling element (41) can reduce the refrigerant flow rate in the first regulating pipe (40). The second regulating pipe (50) has one end connected to the balance tank (30) and the other end connected to the first connecting pipe (20). The first regulating pipe (40) and the second regulating pipe (50) are arranged in parallel. The second regulating pipe (50) is provided with a one-way flow element (51), which enables the refrigerant to flow unidirectionally from the first connecting pipe (20) to the balance tank (30).

2. The heat pump device according to claim 1, characterized in that, The first throttling element (41) is formed by combining one or more of the following: capillary tube, throttling orifice, throttling plate, and electronic expansion valve.

3. The heat pump device according to claim 1, characterized in that, The unidirectional flow element (51) is composed of one or more of a check valve, a solenoid valve, and an electric ball valve.

4. The heat pump device according to claim 1, characterized in that, The heat pump device includes: The first manifold (61) has one end connected to the balance tank (30) and the other end connected to the first regulating pipe (40) and the second regulating pipe (50). The second manifold (62) has one end connected to the first regulating pipe (40) and the second regulating pipe (50), and the other end connected to the first connecting pipe (20).

5. The heat pump device according to claim 1, characterized in that, The heat pump device includes a plurality of first regulating lines (40) and / or a plurality of second regulating lines (50).

6. The heat pump device according to claim 4, characterized in that, A second throttling element (21) is provided on the first connecting pipe (20), and the second throttling element (21) is located between the first heat exchanger (11) and the second manifold (62).

7. The heat pump device according to claim 6, characterized in that, A first filter (22) and a second filter (23) are provided on the first connecting pipe (20). The first filter (22) is located between the second manifold (62) and the second heat exchanger (12), and the second filter (23) is located between the first heat exchanger (11) and the second throttling element (21).

8. The heat pump device according to claim 1, characterized in that, The heat pump device also includes: A compressor (70) and a gas-liquid separator (80), wherein the exhaust port of the gas-liquid separator (80) is connected to the intake port of the compressor (70); A four-way reversing valve (90) is configured such that its C port (91) is connected to the second pipeline of the first heat exchanger (11), its D port (92) is connected to the exhaust port of the compressor (70), its E port (93) is connected to the second pipeline of the second heat exchanger (12), and its S port (94) is connected to the suction port of the gas-liquid separator (80).

9. The heat pump device according to claim 1, characterized in that, The second heat exchanger (12) is a compact heat exchanger.

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