Heat exchange unit

Abstract

The utility model belongs to the technical field of heat exchange units, and provides a heat exchange unit which comprises a heat exchanger, a first pipeline, a second pipeline and a filter assembly. The filtering assembly comprises a shell, a filtering piece, an elastic piece, a first branch, a second branch, a third branch, a sensor, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve and a fourth branch. The filtering piece is movably mounted in the shell; the elastic piece is sleeved on the filtering piece; the first branch is mounted at one end of the shell; the second branch is mounted at the other end of the shell; the third branch is communicated with the first branch and the second branch; the sensor is mounted on the inner side of the other end of the shell; the first one-way valve is mounted at one end, adjacent to the second branch, of the first pipeline; the second one-way valve is mounted on the first branch; the third one-way valve is mounted on the third branch; the fourth branch is communicated with the first branch and is arranged between the shell and the second one-way valve; the fourth one-way valve is installed on the fourth branch.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange units, and particularly relates to a heat exchange unit. Background Art

[0002] In a heat exchange unit, since most of the circulating water is not purified or filtered, it usually contains more impurities. The impurities will enter the pipeline of the heat exchange unit along with the fluid, thus blocking the pipeline of the heat exchange unit. A filtering component is arranged in the pipeline of the heat exchange unit to filter the impurities in the circulating water passing through the pipeline, keep the water quality in the unit clean, and protect the unit. With the long-term operation of the heat exchange unit, impurities gradually accumulate on the filtering component. After the impurities accumulate to a certain amount, the water flow velocity in the pipeline decreases, affecting the heat transfer efficiency. Therefore, it is necessary to regularly disassemble the filtering component for cleaning. However, the disassembly and installation of the filtering component are time-consuming and laborious, and the heat exchange unit is in a shutdown state for a long time, affecting the heat supply. Summary of the Utility Model

[0003] In view of this, the utility model provides a heat exchange unit that can solve or at least alleviate the above problems, so as to be able to monitor the accumulation of impurities on the filtering component, and can realize the cleaning of the accumulated impurities on the filtering component in a time-saving and labor-saving manner, and reduce the shutdown time of the heat exchange unit.

[0004] The technical solution provided by the utility model is: a heat exchange unit, including the heat exchanger, a first pipeline connecting the heat exchanger to the heating system, a second pipeline connecting the heat exchanger to the heat medium system, and a filtering component installed on the first pipeline; the filtering component includes a housing, a filter element, an elastic member, a first branch, a second branch, a third branch, a sensor, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, and a fourth branch; the housing is a hollow cylinder with openings at both ends; the filter element is movably installed in the housing; the elastic member is sleeved on the filter element; the first branch is installed at one axial end of the housing; the second branch is installed at the other axial end of the housing; the third branch communicates with the first branch and the second branch; the sensor is installed inside the other axial end of the housing; the first one-way valve is installed at one end of the first pipeline adjacent to the second branch; the second one-way valve is installed on the first branch; the third one-way valve is installed on the third branch; the fourth branch is installed on one side of the first branch and communicates with the first branch, and the fourth branch is between the housing and the second one-way valve; the fourth one-way valve is installed on the fourth branch.

[0005] In some embodiments, the two axial ends of the housing are respectively set as a first connection portion and a second connection portion, wherein the first connection portion is installed with the first branch, and the second connection portion is installed with the second branch.

[0006] In some embodiments, a plurality of grooves are formed on the inner side of the housing by being recessed radially along the housing.

[0007] In some embodiments, the grooves extend axially along the housing from the first connection portion to an intermediate position on the inner side of the housing.

[0008] In some embodiments, the number of the grooves is three, and the three grooves are arranged at equal intervals in the circumferential direction of the housing.

[0009] In some embodiments, an annular plate is further disposed on the inner side of the housing, and the annular plate is located between the grooves and the second connection portion.

[0010] In some embodiments, the filter element includes a filter main body, a protrusion provided on the outer peripheral side of the filter main body, a support pillar provided on a side of the filter main body facing the second connection portion, and a connecting member sleeved on the support pillar.

[0011] In some embodiments, the filter main body is cylindrical and is provided with a filter net thereon; the protrusion extends radially outward from the outer peripheral side of the filter main body, and the protrusion engages in the groove; the support pillar extends axially along the filter main body; the support pillar passes through the mounting hole on the annular plate, and the connecting member is mounted on the support pillar by a threaded connection; the elastic member is sleeved on the support pillar and abuts between the filter main body and the annular plate.

[0012] In some embodiments, the sensor is mounted on the inner side of the second connection portion and is opposite to an end of the support pillar away from the filter main body.

[0013] In some embodiments, a protrusion is provided at an end of the first branch adjacent to the housing, and the protrusion can engage in the groove of the housing.

[0014] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0015] 1. The heat exchange unit provided by the present utility model can facilitate the staff to monitor the accumulation of impurities on the filter component on the pipeline, and can make the cleaning of the accumulated impurities on the filter component time-saving and labor-saving, and reduce the shutdown time of the heat exchange unit.

[0016] 2. The present utility model filters the circulating water by adopting a filter component installed on the pipeline, and can give a prompt after the impurities accumulate to a certain amount, so as to facilitate the staff to perform backwashing of the filter component, and discharge the impurities in the filter component through backwashing, thereby achieving the purpose of cleaning the filter component.

[0017] 3. The utility model preliminarily positions the first branch relative to the housing through protrusions and grooves, thereby facilitating the alignment of the corresponding connection holes of the first branch and the housing and facilitating the connection between the first branch and the housing. Description of the Drawings

[0018] Figure 1 The schematic diagram of the heat exchange unit according to an embodiment of the utility model is shown.

[0019] Figure 2 The perspective view of the filter assembly of the heat exchange unit of the utility model is shown.

[0020] Figure 3 Shown is Figure 2 The plan view of the shown filter assembly.

[0021] Figure 4 Shown is along Figure 3 The cross-sectional view taken along line A-A in

[0022] Figure 5 Shown is Figure 2 The exploded view of the shown filter assembly.

[0023] Figure 6 Shown is Figure 2 The exploded view of the shown filter assembly in another direction.

[0024] Description of the Reference Numerals: 1 - heat exchange unit; 2 - heat exchanger; 21 - first medium inlet; 22 - first medium outlet; 23 - second medium inlet; 24 - second medium outlet; 4 - filter assembly; 41 - housing; 411 - groove; 412 - ring plate; 413 - first connection part; 414 - second connection part; 42 - filter element; 421 - filter main body; 422 - protrusion; 423 - support column; 424 - connecting piece; 43 - elastic member; 44 - first branch; 441 - protrusion; 45 - second branch; 10 - third branch; 101 - fourth branch; 46 - sensor; 47 - first one-way valve; 48 - second one-way valve; 49 - third one-way valve; 40 - fourth one-way valve; 7 - first pipeline; 8 - second pipeline; 9 - collection bucket. Detailed Description of the Embodiment

[0025] The following further illustrates the utility model in conjunction with the drawings and specific embodiments.

[0026] It should be noted that the following detailed description is illustrative and is intended to provide further illustration of the utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the utility model belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] In the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relational terms determined for the convenience of describing the structural relationship of each component or element of the present utility model and do not specifically refer to any component or element in the present utility model and should not be construed as a limitation to the present utility model.

[0029] In the present utility model, terms such as "fixed connection", "connected", "connected to" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For those related scientific research or technical personnel in the field, the specific meanings of the above terms in the present utility model can be determined according to specific circumstances and should not be construed as a limitation to the present utility model.

[0030] As Figure 1 shown, a heat exchange unit 1 according to an embodiment of the present utility model includes a heat exchanger 2, a first pipeline 7 connecting the heat exchanger 2 to a heating system, a second pipeline 8 connecting the heat exchanger 2 to a heat medium system, and a filtering assembly 4 installed on the first pipeline 7. In this embodiment, both the heating system and the heat medium system can adopt the existing structures in the prior art and will not be specifically described herein. The heat exchanger 2 is a plate heat exchanger. The heat exchanger 2 is provided with a first medium inlet 21, a first medium outlet 22, a second medium inlet 23 and a second medium outlet 24. In this embodiment, the first medium inlet 21 and the second medium outlet 24 are located at the lower end of the heat exchanger 2, the first medium outlet 22 is above the first medium inlet 21, and the second medium inlet 23 is above the second medium outlet 24. The first medium enters the first medium inlet 21 from the first pipeline 7, flows through the heat exchanger 2, and then flows into the first pipeline 7 from the first medium outlet 22. The second medium enters the second medium inlet 23 from the second pipeline 8, flows through the heat exchanger 2, and then flows into the second pipeline 8 from the second medium outlet 24. Check valves and pumps are respectively installed on the first pipeline 7 and the second pipeline 8 to control the flow direction of the corresponding media. The filtering assembly 4 installed on the first pipeline 7 filters the first medium entering the heat exchanger 2.

[0031] At the same time, refer to Figures 2 to 6, the filtering component 4 includes a housing 41, a filter element 42, an elastic member 43, a first branch 44, a second branch 45, a third branch 10, a sensor 46, a first one-way valve 47, a second one-way valve 48, a third one-way valve 49, a fourth one-way valve 40 and a fourth branch 101. The housing 41 is generally a hollow cylinder with openings at both ends. The filter element 42 is installed in the housing 1. The elastic member 43 is sleeved on the filter element 42. The first branch 44 is installed at one axial end of the housing 41. The second branch 45 is installed at the other axial end of the housing 41. The third branch 10 communicates with the first branch 44 and the second branch 45. The sensor 46 is installed on the inner side of the other axial end of the housing 1. The first one-way valve 47 is installed at one end of the first pipeline 7 adjacent to the second branch 45. The second one-way valve 48 is installed on the first branch 44. The third one-way valve 49 is installed on the third branch 10. The fourth branch 101 is installed on one side of the first branch 44 and communicates with the first branch 44. The fourth branch 101 is located between the housing 41 and the second one-way valve 48. The fourth one-way valve 10 is installed on the fourth branch 101.

[0032] The two axial ends of the housing 41 are respectively set as a first connection part 413 and a second connection part 414. The first connection part 413 is installed with the first branch 44, and the second connection part 414 is installed with the second branch 45. Preferably, the first branch 44 and the second branch 45 can be connected to the housing 41 by bolts. A plurality of grooves 411 are formed on the inner side of the housing 41 by radially recessing along the housing. Preferably, the grooves 411 extend axially along the housing 41 from the first connection part 413 to the middle position of the inner side of the housing 41. More preferably, the number of the grooves 411 is 3, and the 3 grooves 411 are arranged at equal intervals along the circumferential direction of the housing 41. A ring plate 412 is further arranged on the inner side of the housing 41. The ring plate 412 is located between the grooves 411 and the second connection part 414. The filter element 42 is movably installed in the housing 41.

[0033] The filter element 42 includes a filter main body 421, a protrusion 422 provided on the outer peripheral side of the filter main body 421, a support column 423 provided on the side of the filter main body 421 facing the second connection portion 414, and a connection member 424 sleeved on the support column 423. In this embodiment, the filter main body 421 is generally cylindrical and is provided with a filter net thereon. The protrusion 422 extends outward from the outer peripheral side of the filter main body 421 in the radial direction of the filter main body 421, and the protrusion 422 is engaged in the groove 411. The support column 423 extends in the axial direction of the filter main body 421. One support column 423 is provided between two adjacent protrusions 422. The support column 423 passes through the mounting hole on the ring plate 412, and the connection member 424 is mounted on the support column 423 by means of threaded connection. The elastic member 43 is sleeved on the support column 423 and is adjacent between the filter main body 421 and the ring plate 412. Preferably, the elastic member 43 is a spring. The sensor 46 is mounted on the inner side of the second connection portion 414 and is opposite to the end of the support column 423 away from the filter main body 421. When too much impurities accumulate on the filter main body 421, under the action of water flow, the filter element 42 is pressed towards the sensor 46, and the end of the support column 423 away from the filter main body 421 acts on the sensor 46. When the pressure reaches a certain value, the sensor 46 issues a warning to notify the staff to perform backwashing on the filter element 42. The sensor 46 is a pressure sensor.

[0034] One end of the first branch 44 adjacent to the housing 41 is provided with a protrusion 441, and the protrusion 441 can be engaged in the groove 411 of the housing 41 so that when the first branch 44 is mounted on the housing 1, the first branch 44 can be preliminarily positioned relative to the housing 41 through the protrusion 441 and the groove 411, thereby facilitating the alignment of the corresponding connection holes of the first branch 44 and the housing 41 and facilitating the connection of the first branch 44 and the housing 41. The first one-way valve 47, the second one-way valve 48, the third one-way valve 49 and the fourth one-way valve 40 can all adopt the existing structures in the prior art and will not be described in detail here.

[0035] When the filtering component 4 is filtering, the first check valve 47 and the second check valve 48 are in the open state, the third check valve 49 and the fourth check valve 40 are in the closed state. The first medium enters the housing 41 through the first branch 44 under the action of the pump, and then is filtered by the filter element 42. The filtered first medium sequentially passes through the second branch 45 and the first check valve 47, and enters the heat exchanger 2 from the first pipeline 7. When the filtering component 4 monitors that the filter element 42 needs to be backwashed, the first check valve 47 and the second check valve 48 are closed, and the third check valve 49 and the fourth check valve 40 are opened. The first medium passes through the third check valve 49 under the action of the pump, enters the second branch 45 through the third branch 10, and then enters the housing 41 to backwash the filter element 42. The sewage with impurities flushed out passes through the first branch 44 and is discharged through the fourth check valve 40. Preferably, a collection bucket 9 is connected to the fourth branch 101, and the sewage flushed out is collected by the collection bucket 9.

[0036] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat exchange unit, comprising the heat exchanger, a first pipeline connecting the heat exchanger to a heating system, a second pipeline connecting the heat exchanger to a heat medium system, and a filtering component installed on the first pipeline; characterized in that, The filtering component includes a housing, a filter element, an elastic element, a first branch, a second branch, a third branch, a sensor, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, and a fourth branch; the housing is a hollow cylinder with openings at both ends; the filter element is movably installed in the housing; the elastic element is sleeved on the filter element; the first branch is installed at one axial end of the housing; the second branch is installed at the other axial end of the housing; the third branch communicates with the first branch and the second branch; the sensor is installed on the inner side of the other axial end of the housing; the first one-way valve is installed at one end of the first pipeline adjacent to the second branch; the second one-way valve is installed on the first branch; the third one-way valve is installed on the third branch; the fourth branch is installed on one side of the first branch and communicates with the first branch, and the fourth branch is between the housing and the second one-way valve; the fourth one-way valve is installed on the fourth branch.

2. The heat exchange unit according to claim 1, characterized in that, The two axial ends of the housing are respectively set as a first connection part and a second connection part, wherein the first connection part is installed with the first branch, and the second connection part is installed with the second branch.

3. The heat exchange unit according to claim 2, characterized in that, A plurality of grooves are formed on the inner side of the housing by being recessed radially along the housing.

4. The heat exchange unit according to claim 3, characterized in that, The grooves extend axially along the housing from the first connection part to the middle position of the inner side of the housing.

5. The heat exchange unit according to claim 3, characterized in that, The number of the grooves is three, and the three grooves are arranged at equal intervals along the circumferential direction of the housing.

6. The heat exchange unit according to claim 3, characterized in that, A ring plate is further arranged on the inner side of the housing, and the ring plate is located between the grooves and the second connection part.

7. The heat exchange unit according to claim 6, wherein The filter element includes a filter main body, a protrusion arranged on the outer peripheral side of the filter main body, a support column arranged on the side of the filter main body facing the second connection part, and a connecting piece sleeved on the support column.

8. The heat exchange unit according to claim 7, characterized in that, The filter main body is cylindrical and is provided with a filter net thereon; the protrusion extends outward from the outer peripheral side of the filter main body radially along the filter main body, and the protrusion engages in the grooves; the support column extends axially along the filter main body; the support column passes through the mounting hole on the ring plate, and the connecting piece is installed on the support column by means of threaded connection; the elastic element is sleeved on the support column and abuts between the filter main body and the ring plate.

9. The heat exchange unit according to claim 8, characterized in that, The sensor is installed on the inner side of the second connection part and is opposite to the end of the support column away from the filter main body.

10. The heat exchange unit according to claim 3, characterized in that, A protrusion is arranged at one end of the first branch adjacent to the housing, and the protrusion can engage in the groove of the housing.

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