Efficient falling film heat exchanger for heat pump system

Abstract

The utility model discloses an efficient falling film type heat exchanger for a heat pump system, which comprises a main body unit, the main body unit comprises a tube shell, a first communicating sleeve and a second communicating sleeve, two fixing discs are symmetrically and fixedly arranged on the inner wall of the tube shell, a plurality of heat exchange tubes are fixedly arranged between the two fixing discs, and the heat exchange tubes are connected with the first communicating sleeve and the second communicating sleeve. The falling film type heat exchanger comprises a tube shell, a liquid outlet pipe is fixedly installed on the lower portion of the tube shell, a liquid inlet pipe is fixedly installed in the inner wall of the tube shell, a liquid distribution pipe is fixedly connected to the lower end of the liquid inlet pipe, a plurality of spray heads are fixedly connected to the side wall of the liquid distribution pipe at equal intervals, and a liquid baffle is fixedly installed on the inner wall of the tube shell. When the falling film type heat exchanger is used as a condenser, the original air outlet pipe is changed into the air inlet pipe, and the function conversion from the falling film type evaporator to the condenser is completed, so that the falling film type heat exchanger can be used as an evaporator and can also be used as the condenser, and the application range of the falling film type heat exchanger is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a high-efficiency falling film heat exchanger for a heat pump system. Background Art

[0002] In a heat pump system with a four-way valve for cold and heat conversion, during the cold and heat conversion, the evaporator and the condenser need to be interchanged. Due to the unidirectionality of the falling film heat exchanger, the falling film heat exchanger can only be used as an evaporator. Therefore, this high-efficiency heat exchanger is not applied in a heat pump system with a four-way valve for cold and heat conversion. Currently, the heat exchanger types used in heat pump systems with a four-way valve for cold and heat conversion are mainly dry heat exchangers, plate heat exchangers, and high-efficiency tanks, but these heat exchangers all have limitations. For example, the dry heat exchanger has poor heat exchange effect, the plate heat exchanger is easy to be blocked and not easy to clean, and the single heat exchange capacity of the high-efficiency tank is small.

[0003] Therefore, a high-efficiency falling film heat exchanger for a heat pump system is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the above problems of a high-efficiency falling film heat exchanger for a heat pump system, the utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a high-efficiency falling film heat exchanger for a heat pump system, which is used to solve the problems such as "in a heat pump system with a four-way valve for cold and heat conversion, during the cold and heat conversion, the evaporator and the condenser need to be interchanged. Due to the unidirectionality of the falling film heat exchanger, the falling film heat exchanger can only be used as an evaporator. Therefore, this high-efficiency heat exchanger is not applied in a heat pump system with a four-way valve for cold and heat conversion. Currently, the heat exchanger types used in heat pump systems with a four-way valve for cold and heat conversion are mainly dry heat exchangers, plate heat exchangers, and high-efficiency tanks, etc., but these heat exchangers all have limitations. For example, the dry heat exchanger has poor heat exchange effect, the plate heat exchanger is easy to be blocked and not easy to clean, and the single heat exchange capacity of the high-efficiency tank is small".

[0007] To solve the above technical problems, the utility model provides the following technical solutions: A high-efficiency falling film heat exchanger for a heat pump system, comprising:

[0008] The main body unit, the main body unit includes a shell, a first connecting sleeve and a second connecting sleeve. On the inner wall of the shell, two fixing plates are symmetrically and fixedly installed. Between the two fixing plates, a plurality of heat exchange tubes are fixedly installed together. In the inner wall of the shell, a liquid inlet pipe is fixedly installed. The lower end of the liquid inlet pipe is fixedly connected with a liquid distribution pipe. On the side wall of the liquid distribution pipe, a plurality of nozzles are fixedly connected at equal intervals. On the inner wall of the shell, a liquid baffle is fixedly installed. The lower end of the shell is fixedly installed with a liquid outlet pipe. The upper end of the shell is fixedly installed with an air inlet and outlet pipe.

[0009] As a preferred scheme of the high-efficiency falling film heat exchanger for a heat pump system of the present utility model, wherein: the first connecting sleeve is fixedly installed at the left end of the shell. On the inner wall of the first connecting sleeve, a partition plate is fixedly connected. On the side wall of the first connecting sleeve, a medium discharge pipe and a medium inlet pipe are symmetrically and fixedly connected.

[0010] As a preferred scheme of the high-efficiency falling film heat exchanger for a heat pump system of the present utility model, wherein: the second connecting sleeve is fixedly installed at the right end of the shell. The first connecting sleeve and the second connecting sleeve are communicated with each other through the heat exchange tubes.

[0011] As a preferred scheme of the high-efficiency falling film heat exchanger for a heat pump system of the present utility model, wherein: an oil return pipe is fixedly installed on the side wall of the shell, and the oil return pipe is used for connecting with an external oil return system.

[0012] As a preferred scheme of the high-efficiency falling film heat exchanger for a heat pump system of the present utility model, wherein: one end of the air inlet and outlet pipe is communicated with the inside of the shell, and the air inlet and outlet pipe is used for the return air of the heat pump system.

[0013] As a preferred scheme of the high-efficiency falling film heat exchanger for a heat pump system of the present utility model, wherein: two support plates are fixedly installed at the lower end of the shell. On each support plate, two mounting holes are symmetrically opened.

[0014] The beneficial effects of the present utility model:

[0015] A liquid outlet pipe is added to the lower part of the traditional falling film heat exchanger of this device. When it is used as a condenser, the original air outlet pipe becomes an air inlet pipe, completing the function transformation from a falling film evaporator to a condenser. Therefore, this device can be used both as an evaporator and as a condenser, expanding the application range of the falling film heat exchanger, and having good heat exchange effect, being easy to clean, and having a large heat exchange capacity. Description of the drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0017] Figure 1 It is a front structural schematic diagram of an efficient falling film heat exchanger for a heat pump system of the present utility model.

[0018] Figure 2 It is a back structural schematic diagram of an efficient falling film heat exchanger for a heat pump system of the present utility model.

[0019] Figure 3 It is a side sectional structural schematic diagram of the shell in an efficient falling film heat exchanger for a heat pump system of the present utility model.

[0020] Description of the drawings: 100, main body unit; 101, shell; 1011, heat exchange tube; 1012, liquid baffle; 102, first connecting sleeve; 103, second connecting sleeve; 104, support plate; 105, medium discharge pipe; 106, medium inlet pipe; 107, inlet liquid pipe; 1071, liquid distribution pipe; 1072, spray head; 108, outlet liquid pipe; 109, inlet and outlet gas pipe; 110, return oil pipe. Detailed implementation manners

[0021] To make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model in conjunction with the drawings of the specification.

[0022] Many specific details are set forth in the following description to facilitate a full understanding of the present utility model, but the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0023] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present utility model. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it a separate or selectively exclusive embodiment from other embodiments.

[0024] Next, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0025] Referring to Figures 1-3 , an embodiment of the present utility model provides a high-efficiency falling film heat exchanger for a heat pump system, which includes:

[0026] A main body unit 100, the main body unit 100 includes a shell 101, a first connecting sleeve 102, and a second connecting sleeve 103. Two fixing plates are symmetrically and fixedly installed on the inner wall of the shell 101. A plurality of heat exchange tubes 1011 are fixedly installed together between the two fixing plates. A liquid inlet pipe 107 is fixedly installed in the inner wall of the shell 101. The lower end of the liquid inlet pipe 107 is fixedly connected to a liquid distribution pipe 1071. A plurality of nozzles 1072 are fixedly connected to the side wall of the liquid distribution pipe 1071 at equal intervals. A liquid baffle 1012 is fixedly installed on the inner wall of the shell 101. A liquid outlet pipe 108 is fixedly installed at the lower end of the shell 101. An air inlet and outlet pipe 109 is fixedly installed at the upper end of the shell 101. A liquid outlet pipe 108 is added at the lower part of the traditional falling film heat exchanger in this device. When used as a condenser, the original air outlet pipe becomes an air inlet pipe, completing the functional transformation from a falling film evaporator to a condenser. Therefore, this device can be used as both an evaporator and a condenser, expanding the application range of the falling film heat exchanger.

[0027] Among them, the first connecting sleeve 102 is fixedly installed at the left end of the shell 101. A partition plate is fixedly connected to the inner wall of the first connecting sleeve 102. A medium discharge pipe 105 and a medium inlet pipe 106 are symmetrically and fixedly connected to the side wall of the first connecting sleeve 102. The partition plate is provided to facilitate the medium to flow into the heat exchange tubes 1011.

[0028] Among them, the second connecting sleeve 103 is fixedly installed at the right end of the shell 101. The first connecting sleeve 102 and the second connecting sleeve 103 are connected through the heat exchange tubes 1011, and the medium flows in the heat exchange tubes 1011.

[0029] Among them, an oil return pipe 110 is fixedly installed on the side wall of the shell 101. The oil return pipe 110 is used to connect with an external oil return system. The accumulated refrigerant oil in the falling film heat exchanger is connected to the oil return system of the heat pump system through the oil return pipe 110.

[0030] Among them, one end of the air inlet and outlet pipe 109 is in communication with the inside of the shell 101. The air inlet and outlet pipe 109 is used for the return air of the heat pump system, and air is introduced and exhausted through the air inlet and outlet pipe 109.

[0031] Among them, two support plates 104 are fixedly installed at the lower end of the shell 101, and two mounting holes are symmetrically formed on each support plate 104. The arrangement of the support plates 104 facilitates the installation of the device.

[0032] Working principle: In a heat pump system, when the falling film heat exchanger is used as an evaporator, the refrigerant liquid coming from the condenser enters the liquid distribution pipe 1071 through the liquid inlet pipe 107, and is evenly sprayed on the heat exchange pipe 1011 through the spray head 1072. After being heated by the freezing medium inside the heat exchange pipe 1011, it becomes refrigerant gas. The refrigerant gas passes through the liquid baffle 1012 and enters the air inlet and outlet pipe 109 and flows out to the heat pump system for return air. The accumulated refrigeration oil in the falling film heat exchanger is connected to the oil return system of the heat pump system through the oil return pipe 110; when used as an evaporator, the heat pump system closes the liquid outlet pipe 108. When the heat pump system switches between heating and cooling, the falling film heat exchanger changes from an evaporator to a condenser. At this time, the heat pump system closes the liquid inlet pipe 107 and the oil return pipe 110. The high-temperature and high-pressure refrigerant gas coming from the compressor exhaust enters the air inlet and outlet pipe 109, passes through the liquid baffle 1012 and enters the heat exchange pipe 1011. After being cooled by the cooling medium inside the heat exchange pipe 1011, it becomes refrigerant liquid, and flows out through the liquid outlet pipe 108 and enters the heat pump system; therefore, this device can be used both as an evaporator and as a condenser, expanding the application range of the falling film heat exchanger. The content not described in detail in this description belongs to the prior art well-known to those skilled in the art.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An efficient falling film heat exchanger for a heat pump system, characterized in that, Comprising: A main body unit (100), the main body unit (100) includes a shell (101), a first connecting sleeve (102) and a second connecting sleeve (103). On the inner wall of the shell (101), two fixing plates are symmetrically and fixedly installed. Between the two fixing plates, a plurality of heat exchange tubes (1011) are fixedly installed together. In the inner wall of the shell (101), a liquid inlet pipe (107) is fixedly installed. The lower end of the liquid inlet pipe (107) is fixedly connected to a liquid distribution pipe (1071). On the side wall of the liquid distribution pipe (1071), a plurality of spray nozzles (1072) are fixedly connected at equal intervals. On the inner wall of the shell (101), a liquid baffle (1012) is fixedly installed. The lower end of the shell (101) is fixedly installed with a liquid outlet pipe (108). The upper end of the shell (101) is fixedly installed with an air inlet and outlet pipe (109).

2. The high-efficiency falling film heat exchanger for a heat pump system according to claim 1, characterized in that: The first connecting sleeve (102) is fixedly installed at the left end of the shell (101). On the inner wall of the first connecting sleeve (102), a partition plate is fixedly connected. On the side wall of the first connecting sleeve (102), a medium discharge pipe (105) and a medium inlet pipe (106) are symmetrically and fixedly connected.

3. The high-efficiency falling film heat exchanger for a heat pump system according to claim 1, wherein: The second connecting sleeve (103) is fixedly installed at the right end of the shell (101). The first connecting sleeve (102) and the second connecting sleeve (103) are connected and communicated through the heat exchange tubes (1011).

4. The highly efficient falling film heat exchanger for a heat pump system according to claim 1, characterized in that: A return oil pipe (110) is fixedly installed on the side wall of the shell (101), and the return oil pipe (110) is used to connect with an external oil return system.

5. An efficient falling film heat exchanger for a heat pump system according to claim 1, characterized in that: One end of the air inlet and outlet pipe (109) is communicated with the inside of the shell (101), and the air inlet and outlet pipe (109) is used for the return air of the heat pump system.

6. The high-efficiency falling film heat exchanger for a heat pump system according to claim 1, characterized in that: Two support plates (104) are fixedly installed at the lower end of the shell (101), and on each support plate (104), two installation holes are symmetrically opened.

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