CN111391258A

CN111391258A - Heat exchange system

Info

Publication number: CN111391258A
Application number: CN202010238647.3A
Authority: CN
Inventors: 邵若时; 熊跃春; 欧宗辉; 黄文坚; 张航宇
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-07-10

Abstract

The invention provides a heat exchange system. The heat exchange system is used for cooling or keeping warm to the processing structure, and the processing structure has fluid passage, and the heat exchange system includes: a pump body structure; the pipeline assembly comprises a first liquid inlet pipeline, a second liquid inlet pipeline and an access pipeline, the first liquid inlet pipeline and the second liquid inlet pipeline are communicated with the cavity of the pump body structure to respectively convey liquid into the pump body structure, one end of the access pipeline is connected with the pump body structure, and the other end of the access pipeline is connected with the liquid inlet end of the fluid channel; first control valve and second control valve, first control valve set up on first inlet channel, and the second control valve sets up on the second inlet channel to make first inlet channel or second inlet channel switch on through controlling first control valve and second control valve, insert the pipeline and pass through pump body structure and first inlet channel or second inlet channel intercommunication. The invention solves the problems that the injection molding period is longer and the labor intensity of workers is increased in the prior art.

Description

Heat exchange system

Technical Field

The invention relates to the technical field of die machining, in particular to a heat exchange system.

Background

At present, the cooling or heat preservation temperature of the mold not only directly influences the quality (such as surface finish, hot bending, residual stress, crystallinity and the like) of the injection molding part, but also directly influences the production cost of the injection molding part.

In the prior art, a cooling water is generally injected into a mold to cool the mold, and then hot air is blown into the mold to keep the temperature of the mold.

However, the above method may lead to complicated operation of the mold by the user, prolong the injection molding cycle, and increase the labor intensity of the worker.

Disclosure of Invention

The invention mainly aims to provide a heat exchange system to solve the problems that in the prior art, the injection molding period is long and the labor intensity of workers is increased.

In order to achieve the above object, the present invention provides a heat exchange system for cooling or insulating a processing structure having a fluid passage, the heat exchange system comprising: a pump body structure; the pipeline assembly comprises a first liquid inlet pipeline, a second liquid inlet pipeline and an access pipeline, the first liquid inlet pipeline and the second liquid inlet pipeline are communicated with the cavity of the pump body structure to respectively convey liquid into the pump body structure, one end of the access pipeline is connected with the pump body structure, and the other end of the access pipeline is connected with the liquid inlet end of the fluid channel; first control valve and second control valve, first control valve set up on first inlet channel, and the second control valve sets up on the second inlet channel to make first inlet channel or second inlet channel switch on through controlling first control valve and second control valve, insert the pipeline and pass through pump body structure and first inlet channel or second inlet channel intercommunication.

Further, the heat exchange system still includes: the first temperature detection structure is arranged on the first liquid inlet pipeline and is used for detecting the temperature of liquid in the first liquid inlet pipeline so as to increase the rotating speed of a motor of the pump body structure when the detection value of the first temperature detection structure is greater than a first preset temperature value; and/or the second temperature detection structure is arranged on the second liquid inlet pipeline and used for detecting the temperature of the liquid in the second liquid inlet pipeline, so that the rotating speed of the motor of the pump body structure is increased when the detection value of the second temperature detection structure is smaller than a second preset temperature value.

Further, the pipe assembly further comprises: and the first end of the output pipeline is connected with the liquid outlet end of the fluid channel, so that the fluid in the fluid channel is led out through the output pipeline.

Further, the pipe assembly further comprises: and the second end of the outlet pipeline is connected with the first end of the return pipeline, and the second end of the return pipeline is used for being connected with a liquid storage device.

Further, the heat exchange system still includes: the third temperature detection structure is arranged on the outlet pipeline and is used for detecting the temperature of the liquid in the outlet pipeline; when the difference between the detection value of the third temperature detection structure and the detection value of the first temperature detection structure is larger than a first preset difference value, the rotating speed of a motor of the pump body structure is increased; when the difference between the detection value of the second temperature detection structure and the detection value of the third temperature detection structure is larger than a second preset difference value, the rotating speed of the motor of the pump body structure is increased.

Further, the heat exchange system also comprises a pressure detection structure; the pressure detection structure is arranged on the access pipeline and used for detecting the pressure of liquid in the access pipeline so as to enable the heat exchange system to send out an alarm signal when the detection value of the pressure detection structure is greater than a first preset pressure value; and/or the pressure detection structure is arranged on the outlet pipeline and is used for detecting the pressure of the liquid in the outlet pipeline so as to enable the heat exchange system to send out an alarm signal when the detection value of the pressure detection structure is greater than a second preset pressure value.

Further, the heat exchange system still includes: the first end of the liquid inlet main pipe is connected with the pump body structure, and the second end of the liquid inlet main pipe is connected with the first liquid inlet pipeline and the second liquid inlet pipeline, so that the first liquid inlet pipeline and the second liquid inlet pipeline are communicated with the cavity of the pump body structure through the liquid inlet main pipe.

Further, the heat exchange system still includes: the first liquid inlet pipeline is connected with a first pipe orifice of the three-way pipe, the second liquid inlet pipeline is connected with a second pipe orifice of the three-way pipe, and a second end of the liquid inlet main pipe is connected with a third pipe orifice of the three-way pipe.

Further, the heat exchange system still includes: the first filtering structure is arranged in the first liquid inlet pipeline to filter impurities in liquid in the first liquid inlet pipeline; and/or second filtration, second filtration sets up in the second inlet conduit to impurity in the liquid that is located the second inlet conduit filters.

Further, the heat exchange system still includes: and the third filtering structure is arranged in the outlet pipeline to filter impurities in the liquid entering the outlet pipeline.

By applying the technical scheme of the invention, before cooling or heat preservation is carried out on the processing structure, liquids with different temperatures are respectively introduced into the first liquid inlet pipeline and the second liquid inlet pipeline. When needs cool off the processing structure, controlling means controls first control valve according to setting for the cycle to make first inlet liquid pipeline switch on, the low-temperature liquid pump that pump body structure will be arranged in first inlet liquid pipeline is sent to the access pipeline in, and low-temperature liquid cools off the cooling in getting into the processing structure via the inlet liquid end of processing structure to the processing structure. When needs keep warm to the processing structure, controlling means controls the second control valve according to setting for the cycle to make the second inlet conduit switch on, the high temperature liquid pump that pump body structure will be arranged in the second inlet conduit pumps to the access pipeline in, and high temperature liquid keeps warm to the processing structure in getting into the processing structure via the feed liquor end of processing structure. Like this, heat transfer system can cool off and keep warm to the processing structure, need not to use the fan to blow hot-blastly to the processing structure, and then has solved among the prior art longer and increased staff intensity of labour's problem of injection moulding cycle. Simultaneously, heat transfer system in this application has still solved the problem that injection moulding product quality is difficult to guarantee, has promoted injection moulding product's processingquality.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of a heat exchange system according to the present invention.

Wherein the figures include the following reference numerals:

10. a pump body structure; 20. a first liquid inlet pipe; 30. a second liquid inlet pipe; 40. connecting a pipeline; 50. a first control valve; 60. a second control valve; 70. a pipe is connected; 80. a return line; 90. a first temperature detection structure; 100. a second temperature detection structure; 110. a pressure detection structure; 120. a third temperature detection structure; 130. a tee pipe fitting; 140. a liquid inlet header pipe; 150. a switch structure; 160. a first filter structure; 170. a second filter structure; 180. a first curved conduit; 190. a second curved conduit.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that the injection molding cycle is longer and increase staff intensity of labour among the prior art, this application provides a heat transfer system.

As shown in fig. 1, the heat exchange system is used for cooling or insulating a processing structure, the processing structure has a fluid channel, and the heat exchange system includes a pump body structure 10, a pipeline assembly, a first control valve 50, and a second control valve 60. Wherein, pipeline components includes first inlet conduit 20, second inlet conduit 30 and inserts pipeline 40, and first inlet conduit 20 and second inlet conduit 30 all communicate with the cavity of pump body structure 10 in order to respectively to pump body structure 10 in the transport liquid, and the one end that inserts pipeline 40 is connected with pump body structure 10, and the other end that inserts pipeline 40 is connected with fluid channel's feed liquor end. The first control valve 50 is arranged on the first liquid inlet pipeline 20, the second control valve 60 is arranged on the second liquid inlet pipeline 30, so that the first liquid inlet pipeline 20 or the second liquid inlet pipeline 30 is conducted by controlling the first control valve 50 and the second control valve 60, and the access pipeline 40 is communicated with the first liquid inlet pipeline 20 or the second liquid inlet pipeline 30 through the pump body structure 10.

By applying the technical scheme of this embodiment, before cooling or insulating the processing structure, liquids with different temperatures are respectively introduced into the first liquid inlet pipeline 20 and the second liquid inlet pipeline 30. When needs cool off the processing structure, controlling means controls first control valve 50 according to the set period to make first inlet conduit 20 switch on, pump body structure 10 will be arranged in the cryogenic liquids pump sending of first inlet conduit 20 to access pipeline 40, cryogenic liquids carry out cooling to the processing structure in getting into the processing structure via the inlet end of processing structure. When needs keep warm to the processing structure, controlling means controls second control valve 60 according to setting for the cycle to make second inlet conduit 30 switch on, pump body structure 10 will be arranged in the high temperature liquid pump sending of second inlet conduit 30 to access pipe 40 in, high temperature liquid keeps warm to the processing structure in getting into the processing structure via the inlet end of processing structure. Like this, heat transfer system can cool off and keep warm to the processing structure, need not to use the fan to blow hot-blastly to the processing structure, and then has solved among the prior art longer and increased staff intensity of labour's problem of injection moulding cycle. Simultaneously, heat transfer system in this embodiment has still solved the problem that injection moulding product quality is difficult to guarantee, has promoted injection moulding product's processingquality.

In this embodiment, the processing structure is a mold. Meanwhile, the first liquid inlet pipeline 20 and the second liquid inlet pipeline 30 are respectively used for conveying liquids with different temperatures so as to cool and insulate the processing structure.

As shown in fig. 1, the heat exchange system further includes a first temperature detecting structure 90 and a second temperature detecting structure 100. Wherein, first temperature detection structure 90 sets up and carries out temperature detection to the liquid in the first inlet conduit 20 on first inlet conduit 20 to when the detected value that first temperature detection structure 90 was greater than first preset temperature value, the rotational speed of the motor of increase pump body structure 10. The second temperature detection structure 100 is arranged on the second liquid inlet pipeline 30 to detect the temperature of the liquid in the second liquid inlet pipeline 30, so that when the detection value of the second temperature detection structure 100 is smaller than a second preset temperature value, the rotating speed of the motor of the pump body structure 10 is increased. Like this, at heat transfer system cooling or heat preservation in-process to the processing structure, first temperature detects structure 90 or second temperature and detects structure 100 and can detect the liquid temperature in first inlet conduit 20 or the second inlet conduit 30, and then realizes heat transfer system to the quick heat transfer of processing structure, has promoted heat transfer system's heat exchange efficiency.

Specifically, in the process of cooling the processing structure by the heat exchange system, the first temperature detection structure 90 detects the temperature of the low-temperature liquid in the first liquid inlet pipeline 20. If the temperature of the low-temperature liquid is detected to be higher than the first preset temperature value, the control device of the heat exchange system increases the motor rotating speed of the pump body structure 10 until the temperature of the low-temperature liquid is lower than or equal to the first preset temperature value, so that the heat exchange system can rapidly cool the processing structure. In the process of heat preservation of the heat exchange system to the processing structure, the second temperature detection structure 100 detects the temperature of the high-temperature liquid in the second liquid inlet pipeline 30. If the temperature of the high-temperature liquid is detected to be smaller than the second preset temperature value, the control device of the heat exchange system increases the motor rotating speed of the pump body structure 10 until the temperature of the high-temperature liquid is larger than or equal to the second preset temperature value, so that the heat exchange system can continuously keep the temperature of the processing structure.

As shown in fig. 1, the pipe assembly further includes an outlet pipe 70. Wherein the first end of the outlet pipe 70 is connected to the outlet end of the fluid channel, so that the fluid in the fluid channel is led out through the outlet pipe 70. Like this, the aforesaid of connecing out pipeline 70 sets up and to derive the liquid in the fluid passage, and then realizes the circulation of liquid in the processing structure, has promoted heat exchange system's heat exchange efficiency.

As shown in fig. 1, the conduit assembly further includes a return conduit 80. Wherein, the second end of the outlet pipe 70 is connected with the first end of the return pipe 80, and the second end of the return pipe 80 is used for connecting with the liquid storage device. Like this, the circulation of liquid in the heat transfer system is realized to above-mentioned setting, avoids liquid extravagant.

In this embodiment, the tap-off line 70 has a curved pipe section. The tubing assembly further includes a first curved tubing 180, one end of the first curved tubing 180 being connected to the curved tubing segment and the other end of the first curved tubing 180 being connected to the return tubing 80. Thus, the above-described arrangement of the first bent pipe 180 facilitates, on the one hand, the connection of the take-out pipe 70 with the return pipe 80; on the other hand, the whole occupied space of the pipeline assembly can be reduced, and the miniaturized design of the heat exchange system is realized.

As shown in fig. 1, the duct assembly further includes a second curved duct 190. Wherein, the one end and the pump body structure 10 of the crooked pipeline 190 of second are connected, and the other end and the access pipeline 40 of the crooked pipeline 190 of second are connected to make pump body structure 10 easier, simple and convenient with the dismouting of access pipeline 40, reduced the dismouting degree of difficulty, also reduced pipeline assembly's whole occupation space.

As shown in fig. 1, the heat exchange system further includes a third temperature sensing structure 120. The third temperature detecting structure 120 is disposed on the outlet pipe 70 to detect the temperature of the liquid in the outlet pipe 70. When the difference between the detection value of the third temperature detection structure 120 and the detection value of the first temperature detection structure 90 is greater than a first preset difference value, the rotation speed of the motor of the pump body structure 10 is increased. So as to increase the rotation speed of the motor of the pump body structure 10 when the difference between the detection value of the second temperature detection structure 100 and the detection value of the third temperature detection structure 120 is greater than the second preset difference. Like this, at heat transfer system operation in-process, the above-mentioned setting of third temperature detection structure 120 can be adjusted the liquid temperature in the pipe assembly, ensures that the liquid bulk temperature in the pipe assembly is comparatively unanimous, and in heat transfer system carries out the cooling process to the processing structure promptly, if connect out the difference of the liquid temperature in the pipeline 70 and the liquid temperature in the first inlet conduit 20 and be greater than first difference of predetermineeing, then controlling means increases the motor speed of pump body structure 10.

In the present embodiment, the first temperature detecting structure 90, the second temperature detecting structure 100 and the third temperature detecting structure 120 are all thermocouples.

As shown in fig. 1, the heat exchange system further includes a pressure detection structure 110. The pressure detection structure 110 is disposed on the access pipe 40, and is configured to detect a pressure of the liquid in the access pipe 40, so that the heat exchange system sends an alarm signal when a detection value of the pressure detection structure 110 is greater than a first preset pressure value. The pressure detection structure 110 is disposed on the outlet pipe 70, and is configured to detect a pressure of the liquid in the outlet pipe 70, so that the heat exchange system sends an alarm signal when a detection value of the pressure detection structure 110 is greater than a second preset pressure value. Therefore, in the operation process of the heat exchange system, the pressure detection structure 110 detects the liquid pressure in the inlet pipeline 40 and the outlet pipeline 70 in real time, the phenomenon of tube explosion caused by overlarge liquid pressure in the heat exchange system is avoided, and the operation reliability of the heat exchange system is improved.

In this embodiment, the pressure sensing structure 110 is a pressure transmitter.

In this embodiment, the heat exchange system further comprises a pressure gauge. Wherein, the pressure gauge is arranged on the access pipe 40 and the access pipe 70 to display the liquid pressure in the pipes, which is convenient for the staff to observe.

As shown in fig. 1, the heat exchange system further includes a feed header 140. The first end of the liquid inlet header pipe 140 is connected to the pump structure 10, and the second end of the liquid inlet header pipe 140 is connected to both the first liquid inlet pipe 20 and the second liquid inlet pipe 30, so that both the first liquid inlet pipe 20 and the second liquid inlet pipe 30 are communicated with the cavity of the pump structure 10 through the liquid inlet header pipe 140. Specifically, the pump body structure 10 has a liquid inlet connected to the liquid inlet manifold 140, so as to facilitate the liquid in the first liquid inlet pipe 20 or the second liquid inlet pipe 30 to flow into the pump body structure 10, thereby improving the liquid fluency in the heat exchange system.

As shown in fig. 1, the heat exchange system further includes a tee fitting 130. The first liquid inlet pipe 20 is connected to a first pipe orifice of the tee pipe fitting 130, the second liquid inlet pipe 30 is connected to a second pipe orifice of the tee pipe fitting 130, and the second end of the liquid inlet header pipe 140 is connected to a third pipe orifice of the tee pipe fitting 130. Thus, the first liquid inlet pipeline 20, the second liquid inlet pipeline 30 and the liquid inlet header pipe 140 are easier, simpler and more convenient to disassemble and replace due to the arrangement, and the disassembling and assembling difficulty is reduced. Meanwhile, the structure is simple, the processing and the realization are easy, and the processing cost of the heat exchange system is reduced.

As shown in fig. 1, the heat exchange system further includes a first filter structure 160 and a second filter structure 170. Wherein, the first filtering structure 160 is arranged in the first liquid inlet pipeline 20 to filter the impurities in the liquid in the first liquid inlet pipeline 20. A second filter arrangement 170 is provided in the second inlet conduit 30 to filter impurities in the liquid in the second inlet conduit 30. In this way, the first filter structure 160 and the second filter structure 170 can filter impurities in the liquid in the pipe during the operation of the heat exchange system, and prevent the impurities from entering the fluid pipe of the processing structure.

Optionally, the heat exchange system further comprises a third filter structure. A third filtering structure is provided in the tapping line 70 to filter impurities in the liquid entering the tapping line 70. Like this, in heat transfer system operation in-process, the third filtration can be filtered the impurity that is located the liquid that connects out in the pipeline 70, prevents that impurity from getting into in the liquid storage device.

As shown in fig. 1, the heat exchange system further includes a switch structure 150. The switch structure 150 is used to control the start and stop of the pump body structure 10.

Specifically, the control device of the system to be heat-exchanged starts a cooling cycle stage after receiving the sol signal of the injection molding machine, the control device controls the first control valve 50 to be opened and controls the second control valve 60 to be closed, the control device obtains the temperature of the liquid in the first liquid inlet pipeline 20 and the liquid in the outlet pipeline 70, and if the temperature value is deviated from a preset temperature value, the control device changes the fan rotating speed of the pump body structure 10 through the frequency converter to change the cooling water flow and correct the cooling water flow. If the injection molding cycle is set to 51s, the cooling time is set to 39s, the cold defect temperature is set to 16-18 ℃, then the heat preservation stage is started, the time is 12s, and the temperature is set to 32 ℃. At the beginning of the heat preservation phase, the control device controls the first control valve 50 to be closed and controls the second control valve 60 to be opened, and the temperature is adjusted by controlling the fan speed of the pump body structure 10. And the whole work flow is finished, and a next injection molding signal is waited.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

before cooling or heat preservation is carried out on the processing structure, liquids with different temperatures are respectively introduced into the first liquid inlet pipeline and the second liquid inlet pipeline. When needs cool off the processing structure, controlling means controls first control valve according to setting for the cycle to make first inlet liquid pipeline switch on, the low-temperature liquid pump that pump body structure will be arranged in first inlet liquid pipeline is sent to the access pipeline in, and low-temperature liquid cools off the cooling in getting into the processing structure via the inlet liquid end of processing structure to the processing structure. When needs keep warm to the processing structure, controlling means controls the second control valve according to setting for the cycle to make the second inlet conduit switch on, the high temperature liquid pump that pump body structure will be arranged in the second inlet conduit pumps to the access pipeline in, and high temperature liquid keeps warm to the processing structure in getting into the processing structure via the feed liquor end of processing structure. Like this, heat transfer system can cool off and keep warm to the processing structure, need not to use the fan to blow hot-blastly to the processing structure, and then has solved among the prior art longer and increased staff intensity of labour's problem of injection moulding cycle. Simultaneously, heat transfer system in this application has still solved the problem that injection moulding product quality is difficult to guarantee, has promoted injection moulding product's processingquality

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchange system for cooling or insulating a process structure, the process structure having a fluid passageway, the heat exchange system comprising:

a pump body structure (10);

the pipeline assembly comprises a first liquid inlet pipeline (20), a second liquid inlet pipeline (30) and an access pipeline (40), the first liquid inlet pipeline (20) and the second liquid inlet pipeline (30) are communicated with a cavity of the pump body structure (10) to respectively convey liquid into the pump body structure (10), one end of the access pipeline (40) is connected with the pump body structure (10), and the other end of the access pipeline (40) is connected with a liquid inlet end of the fluid channel;

first control valve (50) and second control valve (60), first control valve (50) set up on first feed liquor pipeline (20), second control valve (60) set up on second feed liquor pipeline (30), in order through control first control valve (50) with second control valve (60) make first feed liquor pipeline (20) or second feed liquor pipeline (30) switch on, access pipeline (40) pass through pump body structure (10) with first feed liquor pipeline (20) or second feed liquor pipeline (30) intercommunication.

2. The heat exchange system of claim 1, further comprising:

the first temperature detection structure (90) is arranged on the first liquid inlet pipeline (20) and is used for detecting the temperature of the liquid in the first liquid inlet pipeline (20), so that when the detection value of the first temperature detection structure (90) is greater than a first preset temperature value, the rotating speed of a motor of the pump body structure (10) is increased; and/or

Second temperature detects structure (100), second temperature detects structure (100) and sets up it is right on second inlet conduit (30) liquid in second inlet conduit (30) carries out the temperature detection, with when the detected value of second temperature detection structure (100) is less than the second and predetermines the temperature value, the increase the rotational speed of the motor of pump body structure (10).

3. The heat exchange system of claim 2, wherein the tube assembly further comprises:

and a first end of the outlet pipe (70) is connected with the liquid outlet end of the fluid channel, so that the fluid in the fluid channel is led out through the outlet pipe (70).

4. The heat exchange system of claim 3, wherein the tube assembly further comprises:

the second end of the outlet pipeline (70) is connected with the first end of the return pipeline (80), and the second end of the return pipeline (80) is used for being connected with a liquid storage device.

5. The heat exchange system of claim 4, further comprising:

a third temperature detection structure (120), wherein the third temperature detection structure (120) is arranged on the outlet pipeline (70) and is used for detecting the temperature of the liquid in the outlet pipeline (70);

when the difference between the detection value of the third temperature detection structure (120) and the detection value of the first temperature detection structure (90) is larger than a first preset difference value, the rotating speed of the motor of the pump body structure (10) is increased; so as to increase the rotation speed of the motor of the pump body structure (10) when the difference between the detection value of the second temperature detection structure (100) and the detection value of the third temperature detection structure (120) is larger than a second preset difference value.

6. A heat exchange system according to claim 3, further comprising a pressure sensing structure (110);

the pressure detection structure (110) is arranged on the access pipeline (40) and is used for detecting the pressure of liquid in the access pipeline (40) so as to enable the heat exchange system to send out an alarm signal when the detection value of the pressure detection structure (110) is greater than a first preset pressure value; and/or

The pressure detection structure (110) is arranged on the outlet pipeline (70) and used for detecting the pressure of liquid in the outlet pipeline (70) so as to enable the heat exchange system to send out an alarm signal when the detection value of the pressure detection structure (110) is larger than a second preset pressure value.

7. The heat exchange system of claim 1, further comprising:

feed liquor header pipe (140), the first end of feed liquor header pipe (140) with pump body structure (10) are connected, the second end of feed liquor header pipe (140) with first inlet conduit (20) with second inlet conduit (30) all connect, so that first inlet conduit (20) with second inlet conduit (30) all pass through feed liquor header pipe (140) with the cavity intercommunication of pump body structure (10).

8. The heat exchange system of claim 7, further comprising:

the three-way pipe (130), the first liquid inlet pipeline (20) is connected with a first pipe orifice of the three-way pipe (130), the second liquid inlet pipeline (30) is connected with a second pipe orifice of the three-way pipe (130), and a second end of the liquid inlet main pipe (140) is connected with a third pipe orifice of the three-way pipe (130).

9. The heat exchange system of claim 1, further comprising:

a first filtering structure (160), said first filtering structure (160) being arranged in said first inlet duct (20) to filter impurities in the liquid in said first inlet duct (20); and/or

A second filter structure (170), said second filter structure (170) being disposed within said second inlet conduit (30) to filter impurities in liquid located within said second inlet conduit (30).

10. The heat exchange system of claim 3, further comprising:

a third filtering structure disposed within the tap-off conduit (70) to filter impurities in the liquid entering the tap-off conduit (70).