Efficient large-temperature-difference flooded water chilling unit

Abstract

The utility model provides an efficient large temperature difference flooded water chilling unit which comprises a first evaporator and a second evaporator, one end of the first evaporator is fixedly provided with a first seal head, the other end of the first evaporator is connected with the second evaporator through a middle connector, and the other end of the second evaporator is fixedly provided with a second seal head. Heat exchange pipes are fixedly arranged in the first evaporator and the second evaporator, the interiors of the first end socket and the second end socket are each divided into an upper cavity and a lower cavity through a partition plate, and the interior of the middle connector is divided into a first water return cavity, a second water return cavity and a connecting cavity through a partition assembly. The water inlet pipe is communicated with the lower cavity of the first sealing head, the water outlet pipe is communicated with the lower cavity of the second sealing head, only two evaporators are adopted for series connection, and chilled water is subjected to baffling circulation in the two evaporators, so that heat exchange paths are increased, the temperature difference of inlet water and outlet water is increased, and the occupied space volume is reduced.

Description

Technical Field

[0001] This application relates to the field of chiller manufacturing, and more specifically, to a high-efficiency, large-temperature-difference, flooded chiller. Background Technology

[0002] Currently, flooded chiller units are used in industries such as chemical engineering and air separation for applications with small flow rates and large temperature differences. However, the maximum temperature difference between the inlet and outlet chilled water in existing flooded chiller units can only reach 10℃, which cannot meet the requirements of small flow rates and large temperature differences in chemical process designs. To increase the temperature difference between the inlet and outlet water, the only way is to increase the heat exchange path, i.e., increase the length of the heat exchange tubes. Therefore, the current method to increase the temperature difference between the inlet and outlet water is to connect multiple evaporators in series. However, connecting multiple evaporators in series is not only costly but also occupies a lot of space.

[0003] Therefore, those skilled in the art need to improve existing chiller units to overcome the aforementioned deficiencies. Utility Model Content

[0004] The main purpose of this application is to provide a high-efficiency, large-temperature-difference, flooded water chiller unit that uses only two evaporators connected in series. The chilled water circulates in a baffled manner within the two evaporators, which not only increases the heat exchange path and the temperature difference between the inlet and outlet water, but also reduces the space occupied.

[0005] To achieve the above objectives, in a first aspect, this application provides a high-efficiency, large-temperature-difference, flooded water chiller unit, including a first evaporator and a second evaporator. One end of the first evaporator is fixedly provided with a first end cap, and the other end of the first evaporator is connected to the second evaporator through an intermediate connector. The other end of the second evaporator is fixedly provided with a second end cap. Heat exchange tubes are fixedly provided inside both the first and second evaporators. One end of the heat exchange tube is fixedly connected to the first end cap or the second end cap through a first tube sheet flange, and the other end of the heat exchange tube is fixedly connected to the intermediate connector through a second tube sheet flange.

[0006] Both the first end cap and the second end cap are divided into an upper cavity and a lower cavity by a partition plate. The intermediate connector is divided into a first return water cavity, a second return water cavity, and a connecting cavity by a partition component. It also includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the lower cavity of the first end cap, and the outlet pipe is connected to the lower cavity of the second end cap.

[0007] Optionally, both the first evaporator and the second evaporator are provided with a refrigerant inlet located at the bottom and a refrigerant outlet located at the top.

[0008] Optionally, the partition assembly is a T-shaped partition, the connecting cavity is located above and is used to connect the heat exchange tubes of the first evaporator and the second evaporator, the first return water cavity and the second return water cavity are located side by side below the connecting cavity, the first return water cavity connects to the heat exchange tube in the first evaporator, and the second return water cavity connects to the heat exchange tube in the second evaporator.

[0009] Optionally, it also includes a backup water outlet, which is connected to the connecting cavity.

[0010] Optionally, sealing elements are provided between the partition plate and the first end cap and the second end cap, and between the partition assembly and the intermediate connector.

[0011] Optionally, the sealing element is a sealing ring or a sealing strip.

[0012] The present invention provides a high-efficiency, large temperature difference, flooded water chiller unit. Compared with the prior art, its advantages are as follows: Although two evaporators are connected in series in this application, it is not the same as the conventional direct series connection. The end caps and intermediate connectors are separated by a partition, thereby increasing the heat exchange path of the chilled water and enabling it to undergo baffled cooling, which greatly improves the heat exchange path and reduces the space occupied. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0014] Figure 1 This is a schematic diagram of the present invention.

[0015] The components are: 1. First evaporator; 2. Second evaporator; 3. Refrigerant inlet; 4. Refrigerant outlet; 5. First end cap; 6. Second end cap; 7. Divider plate; 8. Divider assembly; 9. Water inlet pipe; 10. Water outlet pipe; 11. Backup water outlet; 12. Intermediate connector. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0018] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] In addition, the term "multiple" should mean two or more.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown, a high-efficiency, large-temperature-difference, flooded water chiller unit includes a first evaporator 1 and a second evaporator 2. A first end cap 5 is fixedly installed at one end of the first evaporator 1, and the other end of the first evaporator 1 is connected to the second evaporator 2 through an intermediate connector 12. A second end cap 6 is fixedly installed at the other end of the second evaporator 2. Heat exchange tubes are fixedly installed inside both the first evaporator 1 and the second evaporator 2. One end of the heat exchange tube is fixedly connected to the first end cap 5 or the second end cap 6 through a first tube sheet flange, and the other end of the heat exchange tube is fixedly connected to the intermediate connector 12 through a second tube sheet flange.

[0023] The first end cap 5 and the second end cap 6 are each divided into an upper cavity and a lower cavity by a partition plate 7. The intermediate connector is divided into a first return water cavity, a second return water cavity, and a connecting cavity by a partition component 8. It also includes an inlet pipe 9 and an outlet pipe 10. The inlet pipe 9 is connected to the lower cavity of the first end cap 5, and the outlet pipe 10 is connected to the lower cavity of the second end cap 6. In order to ensure the sealing effect, sealing elements are provided between the partition plate 7 and the first end cap 5 and the second end cap 6, and between the partition component 8 and the intermediate connector 12. The sealing elements are sealing rings or sealing strips, so as not to cause cross-flow of chilled water at different temperatures.

[0024] To ensure heat exchange effect and improve heat exchange efficiency, both the first evaporator 1 and the second evaporator 2 are provided with a refrigerant inlet 3 located at the bottom and a refrigerant outlet 4 located at the top. That is, heat exchange is carried out in the cavity of both evaporators through refrigerant, thereby increasing the maximum temperature difference between the inlet and outlet water.

[0025] Preferably, the partition component 8 is a T-shaped partition. The connecting cavity is located above and is used to connect the heat exchange tubes of the first evaporator 1 and the second evaporator 2. The first return water cavity and the second return water cavity are located side by side below the connecting cavity. The first return water cavity connects to the heat exchange tube in the first evaporator 1, and the second return water cavity connects to the heat exchange tube in the second evaporator 2. It also includes a backup water outlet 11, which is connected to the connecting cavity. This continuous series structure allows for two refrigeration systems, increasing the evaporation temperature of the first stage and further improving the unit's energy efficiency, resulting in significant energy savings. Under ideal operating conditions, it can save approximately 10% of electricity. The discharge capacity requirement of the first-stage compressor can also be significantly reduced, saving on unit investment costs. When a large temperature difference is not required, a backup return water outlet can be added to the intermediate structure. The above description is only a preferred embodiment of this application and is not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-efficiency, large-temperature-difference, flooded water chiller unit, characterized in that, The device includes a first evaporator and a second evaporator. One end of the first evaporator is fixedly provided with a first end cap, and the other end of the first evaporator is connected to the second evaporator through an intermediate connector. The other end of the second evaporator is fixedly provided with a second end cap. Heat exchange tubes are fixedly provided inside both the first evaporator and the second evaporator. One end of the heat exchange tube is fixedly connected to the first end cap or the second end cap through a first tube sheet flange, and the other end of the heat exchange tube is fixedly connected to the intermediate connector through a second tube sheet flange. Both the first end cap and the second end cap are divided into an upper cavity and a lower cavity by a partition plate. The intermediate connector is divided into a first return water cavity, a second return water cavity, and a connecting cavity by a partition component. It also includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the lower cavity of the first end cap, and the outlet pipe is connected to the lower cavity of the second end cap.

2. The high-efficiency, large-temperature-difference, flooded water chiller unit as described in claim 1, characterized in that: Both the first evaporator and the second evaporator are provided with a refrigerant inlet located at the bottom and a refrigerant outlet located at the top.

3. The high-efficiency, large-temperature-difference, flooded water chiller unit as described in claim 1, characterized in that: The partition assembly is a T-shaped partition. The connecting cavity is located above and is used to connect the heat exchange tubes of the first evaporator and the second evaporator. The first return water cavity and the second return water cavity are located side by side below the connecting cavity. The first return water cavity connects to the heat exchange tube in the first evaporator, and the second return water cavity connects to the heat exchange tube in the second evaporator.

4. The high-efficiency, large-temperature-difference, flooded water chiller unit as described in claim 3, characterized in that: It also includes a backup water outlet, which is connected to the connecting cavity.

5. The high-efficiency, large-temperature-difference, flooded water chiller unit as described in claim 1, characterized in that: Sealing elements are provided between the partition plate and the first and second end caps, and between the partition assembly and the intermediate connector.

6. The high-efficiency, large-temperature-difference, flooded water chiller unit as described in claim 5, characterized in that: The sealing element is a sealing ring or a sealing strip.

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