An evaporator device applied to a heat pump system

Abstract

The utility model relates to evaporator technical field especially for a kind of evaporator device applied to heat pump system, including evaporator shell, the both ends of evaporator shell are equipped with head, one of the head is equipped with heat medium inlet, the other head is equipped with heat medium outlet, the top of evaporator shell is equipped with refrigerant medium inlet, the bottom of evaporator shell is equipped with refrigerant medium outlet, refrigerant medium inlet and refrigerant medium outlet are about the vertical center line of evaporator shell symmetrical alternation distribution, the inside of evaporator shell is equipped with several heat exchange pipes, the both sides outside of heat exchange pipe is equipped with oil return mechanism. The device can pass through the mode of indirect heat exchange, so that heat medium flows in heat exchange pipe, and infiltrates in refrigerant medium, to reach the purpose of sufficient heat exchange, and lubricating oil can be recycled under the action of oil return mechanism, reduce lubricating oil accumulation in evaporator.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, and specifically to an evaporator device applied to a heat pump system. Background Technology

[0002] An evaporator is a heat transfer device that uses heating to evaporate a liquid, thereby achieving solution concentration, solute separation, or solvent recovery. Its core principle is to use thermal energy to convert liquid substances into gaseous states while retaining or separating the target components. It is widely used in chemical, food, pharmaceutical, and environmental protection fields. A heat pump system is an energy-saving device that transfers heat from a low-temperature heat source (such as air, water, or soil) to a high-temperature heat source (such as indoor spaces or industrial processes) by consuming a small amount of electrical or mechanical energy.

[0003] Chinese utility model patent CN216204477U discloses a spray evaporator device for a heat pump system, which includes "an evaporator shell, the two ends of the evaporator shell and the evaporator end cap are connected by flanges and tube sheets with bolts to form a sealed container, a heat working medium inlet is provided on one end of the evaporator end cap, and a heat working medium outlet is provided on the other end of the evaporator end cap, and the heat working medium inlet, the heat working medium outlet and the sealed container are connected"; however, the lubricating oil (refrigeration oil) of this device is prone to accumulate in the evaporator, which can easily lead to problems such as insufficient oil in the compressor and poor lubrication. Utility Model Content

[0004] The purpose of this invention is to provide an evaporator device for use in heat pump systems to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an evaporator device for a heat pump system, comprising an evaporator shell, wherein both ends of the evaporator shell are provided with end caps, one of the end caps is provided with a heat medium inlet, and the other end cap is provided with a heat medium outlet;

[0006] The top of the evaporator shell is provided with a refrigerant inlet, and the bottom of the evaporator shell is provided with a refrigerant outlet. The refrigerant inlet and refrigerant outlet are symmetrically and alternately distributed about the vertical center line of the evaporator shell. The interior of the evaporator shell is provided with several heat exchange components, and the outer sides of the heat exchange components are provided with oil return mechanisms.

[0007] The oil return mechanism includes an oil return chamber with an internal cavity. The cavity can be filled with different low-density substances depending on the refrigerant, so that the top of the oil return chamber is level with the liquid surface. The top of the oil return chamber has several oil inlets, and the inside of each oil inlet has several movable oil return pipes. One end of each movable oil return pipe is fitted with a fixed oil return pipe. A sliding rod is movably fitted onto one side of the inner wall of the oil return chamber.

[0008] The beneficial effects of this utility model are: it can indirectly and fully exchange heat with the medium that needs to be heated, and it can return the lubricating oil in the cold medium at different liquid levels to prevent the accumulation of lubricating oil.

[0009] To achieve sufficient heat exchange between the cold and hot media:

[0010] The evaporator shell is further configured as follows: the evaporator shell is a hollow cylindrical cavity structure.

[0011] By adopting the above technical solution, sufficient heat exchange can be achieved between the heat medium and a sufficient amount of cold medium.

[0012] To achieve more efficient heat exchange and improve heat exchange efficiency:

[0013] The heat exchange assembly is further configured such that: the heat exchange tubes are arranged in a ring about the vertical center line of the evaporator shell; the heat exchange tubes are provided with liquid collection pipes at both ends, and the liquid collection pipes are movably connected to the heat medium inlet and the heat medium outlet, respectively.

[0014] By adopting the above technical solution, the heat exchange area between the cold medium and the hot medium can be increased through the combined action of multiple annularly distributed heat exchange tubes, thereby improving the efficiency of heat exchange.

[0015] To achieve the return operation of lubricating oil:

[0016] The oil return chamber, cavity, oil inlet, movable oil return pipe, fixed oil return pipe and slide bar are set as a group, and multiple groups of oil return chambers, cavities, oil inlets, movable oil return pipes, fixed oil return pipes and slide bars are symmetrically distributed about the horizontal center line of the evaporator shell. The oil return chamber is located in the external space of the heat exchange tubes, and the size of the oil return chamber will not affect multiple heat exchange tubes.

[0017] By adopting the above technical solution, multiple oil return chambers can maintain different levels of cold medium liquid surface to perform oil return operations for lubricating oil.

[0018] To enable oil return operations for refrigerant media at different liquid levels:

[0019] The slide bar is further configured such that its two ends are movably connected to the upper and lower inner walls of the evaporator shell, and the oil return chamber moves up and down along the slide bar.

[0020] By adopting the above technical solution, the oil return tank can always be maintained on the surface of the cold medium liquid under the action of the low-density medium in the cavity, so that the oil return operation can be carried out continuously.

[0021] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main view of this utility model;

[0023] Figure 2 This is a front view full sectional view of the present invention;

[0024] Figure 3 This is a schematic diagram of the heat exchange component of this utility model;

[0025] Figure 4 This is a schematic diagram of the oil return mechanism of this utility model.

[0026] In the diagram: 1. Evaporator shell; 2. End cap; 3. Hot medium inlet; 4. Hot medium outlet; 5. Cold medium inlet; 6. Cold medium outlet; 7. Heat exchange assembly; 701. Heat exchange tube; 702. Liquid collection pipe; 8. Oil return mechanism; 801. Oil return chamber; 802. Cavity; 803. Oil inlet; 804. Movable oil return pipe; 805. Fixed oil return pipe; 806. Slide bar. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0028] Please see Figures 1 to 4 An evaporator device for use in a heat pump system includes an evaporator shell 1, with end caps 2 at both ends of the evaporator shell 1. One end cap 2 has a heat medium inlet 3, and the other end cap 2 has a heat medium outlet 4.

[0029] The top of the evaporator shell 1 is provided with a refrigerant inlet 5, and the bottom of the evaporator shell 1 is provided with a refrigerant outlet 6. The refrigerant inlet 5 and the refrigerant outlet 6 are symmetrically and alternately distributed about the vertical center line of the evaporator shell 1. Several heat exchange components 7 are provided inside the evaporator shell 1, and oil return mechanisms 8 are provided on both sides of the heat exchange components 7.

[0030] The oil return mechanism 8 includes an oil return chamber 801, and the interior of the oil return chamber 801 is provided with a cavity 802. The cavity 802 can be filled with different low-density substances according to different refrigerant substances so that the top of the oil return chamber 801 can be level with the liquid surface. The top of the oil return chamber 801 is provided with several oil inlets 803. Several movable oil return pipes 804 are provided inside the oil inlets 803. A fixed oil return pipe 805 is sleeved on the outside of one end of the movable oil return pipe 804. A slide rod 806 is movably sleeved on one side of the inner wall of the oil return chamber 801.

[0031] In this embodiment, as Figure 2 As shown, the evaporator shell 1 is a hollow cylindrical cavity structure.

[0032] In this embodiment, as Figure 3 As shown, the heat exchange assembly 7 includes heat exchange tubes 701, and multiple heat exchange tubes 701 are arranged in a ring about the vertical center line of the evaporator shell 1. The two ends of the heat exchange tubes 701 are respectively provided with liquid collection pipes 702, and the liquid collection pipes 702 are respectively movably connected to the heat medium inlet 3 and the heat medium outlet 4.

[0033] In this embodiment, as Figure 4 As shown, the oil return chamber 801, cavity 802, oil inlet 803, movable oil return pipe 804, fixed oil return pipe 805 and slide bar 806 are grouped together, and multiple groups of oil return chambers 801, cavity 802, oil inlet 803, movable oil return pipe 804, fixed oil return pipe 805 and slide bar 806 are symmetrically distributed about the horizontal center line of the evaporator shell 1. The oil return chamber 801 is located in the external space of the heat exchange tube 701, and the size of the oil return chamber 801 will not affect the multiple heat exchange tubes 701.

[0034] In this embodiment, as Figure 4 As shown, the two ends of the slide bar 806 are movably connected to the upper and lower inner walls of the evaporator shell 1, respectively, and the oil return chamber 801 moves up and down along the slide bar 806.

[0035] The evaporator device used in the heat pump system operates as follows:

[0036] First, the medium to be heated is introduced into the liquid collection pipe 702 through the heat medium inlet 3 and flows into the interior of the annularly distributed heat exchange tubes 701. The cold medium is added into the interior of the evaporator shell 1 through the cold medium inlet 5 and the multiple heat exchange tubes 701 are completely wetted. After the heat exchange is completed, the heat medium flows out of the evaporator shell 1 through the heat medium outlet 4, while the cold medium that has become hot after the exchange flows out of the evaporator shell 1 through the cold medium outlet 6.

[0037] During the heat exchange process, the oil return chamber 801 is kept on the surface of the cold medium under the action of the low-density medium inside the cavity 802, and the oil inlet 803 is kept at the liquid level, so that the lubricating oil can flow into the movable oil return pipe 804 through the oil inlet 803. One end of the fixed oil return pipe 805 is connected to an ejector pump (model: ZLIH100-125), which uses the kinetic energy of the high-speed fluid (driving fluid) to draw the lubricating oil out of the evaporator shell 1 through the movable oil return pipe 804 and the fixed oil return pipe 805. When the liquid level decreases, the oil return chamber 801 can move along the slide bar 806 so that the oil return chamber 801 is always on the liquid level.

[0038] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. An evaporator device for use in a heat pump system, characterized in that: It includes an evaporator shell (1), and the two ends of the evaporator shell (1) are provided with end caps (2), one of the end caps (2) is provided with a heat medium inlet (3), and the other end cap (2) is provided with a heat medium outlet (4); The top of the evaporator shell (1) is provided with a cold medium inlet (5), and the bottom of the evaporator shell (1) is provided with a cold medium outlet (6). The cold medium inlet (5) and the cold medium outlet (6) are symmetrically and alternately distributed about the vertical center line of the evaporator shell (1). The interior of the evaporator shell (1) is provided with several heat exchange components (7), and the two sides of the heat exchange components (7) are provided with oil return mechanisms (8). The oil return mechanism (8) includes an oil return chamber (801), the interior of which is provided with a cavity (802). The cavity (802) can be filled with different low-density substances according to different refrigerant substances so that the top of the oil return chamber (801) can be level with the liquid surface. The top of the oil return chamber (801) is provided with several oil inlets (803). The interior of the oil inlets (803) is provided with several movable oil return pipes (804). One end of the movable oil return pipe (804) is externally fitted with a fixed oil return pipe (805). A sliding rod (806) is movably fitted onto one side of the inner wall of the oil return chamber (801).

2. The evaporator device for use in a heat pump system as described in claim 1, characterized in that: The evaporator shell (1) is a hollow cylindrical cavity structure.

3. The evaporator device for use in a heat pump system as described in claim 1, characterized in that: The heat exchange assembly (7) includes heat exchange tubes (701), and multiple heat exchange tubes (701) are arranged in a ring about the vertical center line of the evaporator shell (1). The two ends of the heat exchange tubes (701) are respectively provided with liquid collection tubes (702), and the liquid collection tubes (702) are movably connected to the heat medium inlet (3) and the heat medium outlet (4).

4. An evaporator device for use in a heat pump system as described in claim 1, characterized in that: The oil return chamber (801), cavity (802), oil inlet (803), movable oil return pipe (804), fixed oil return pipe (805) and slide bar (806) are a group, and multiple groups of oil return chambers (801), cavities (802), oil inlets (803), movable oil return pipes (804), fixed oil return pipes (805) and slide bars (806) are symmetrically distributed about the horizontal center line of the evaporator shell (1). The oil return chamber (801) is located in the external space of the heat exchange tube (701), and the size of the oil return chamber (801) will not affect the multiple heat exchange tubes (701).

5. An evaporator device for use in a heat pump system as described in claim 1, characterized in that: The two ends of the slide rod (806) are movably connected to the upper and lower inner walls of the evaporator shell (1), and the oil return chamber (801) moves up and down along the slide rod (806).

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