Heat exchanger assembly and air conditioner
By adopting a parallel second heat exchange pipeline design and injector and distributor in the heat exchanger, the problem of low heat exchanger efficiency is solved, more efficient heat exchange effect and lower pressure drop loss are achieved, and the performance of the air conditioning system is improved.
Patent Information
- Application Number
- CN202422187963.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-05
AI Technical Summary
In the prior art, the heat exchange efficiency of the heat exchanger is not high, mainly because the heat exchange pipeline is in series structure.
The second heat exchange pipeline design in parallel is adopted, combined with the injector and the distributor, the liquid refrigerant is input through the liquid pipe, and the refrigerant flow rate is reduced by multiple second heat exchange pipelines in parallel, matching the pressure drop loss and convection heat exchange coefficient to ensure the best heat exchange efficiency.
It improves the heat exchange efficiency of the heat exchanger, reduces the pressure drop loss, and enhances the reliability and energy efficiency of the air conditioning system.
Smart Images
Figure CN223064050U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of air conditioners, and particularly to a heat exchanger assembly and an air conditioner. Background Art
[0002] As the main tool for heat exchange between the refrigerant and the external environment in an air conditioning system, the performance of the heat exchanger has a significant impact on the capacity and energy efficiency of the air conditioner. The heat exchange pipes in the heat exchanger have an important impact on the heat exchange capacity of the heat exchanger. In the prior art, the heat exchange pipes are connected in series, and the heat exchange efficiency of the heat exchanger is not high. Summary of the Utility Model
[0003] The main purpose of this application is to provide a heat exchanger assembly and an air conditioner, aiming to solve the technical problem of low heat exchange efficiency of the heat exchanger in the prior art.
[0004] An embodiment of this application provides a heat exchanger assembly, including:
[0005] A liquid pipe for transporting liquid refrigerant;
[0006] A first heat exchange pipe, the first end of the first heat exchange pipe is connected to the liquid pipe;
[0007] At least two second heat exchange pipes, the at least two second heat exchange pipes are connected in parallel and connected to the second end of the first heat exchange pipe; and
[0008] An air pipe, the air pipe is connected to the at least two second heat exchange pipes for transporting gaseous refrigerant.
[0009] Optionally, the first heat exchange pipe includes a plurality of first pipes, and the plurality of first pipes are connected in series in sequence;
[0010] The second heat exchange pipe includes a plurality of second pipes, and the plurality of second pipes are connected in series in sequence;
[0011] Wherein, the number of the first pipes is less than the number of the second pipes.
[0012] Optionally, the number of the second pipes of the at least two second heat exchange pipes is the same.
[0013] Optionally, the first heat exchange pipe and the at least two second heat exchange pipes are sequentially spaced along the height direction of the heat exchanger assembly.
[0014] Optionally, the heat exchanger assembly further includes a first connecting pipe; the at least two heat exchange pipes are connected to the second end of the first heat exchange pipe through the first connecting pipe.
[0015] Optionally, the heat exchanger assembly further includes an ejector and / or a distributor, and the ejector and / or the distributor is disposed on the first connection pipeline.
[0016] Optionally, a first end of the distributor is connected to the ejector; the distributor has at least two second ends, and each second heat exchange pipeline is connected to a corresponding second end;
[0017] Wherein, in the direction of the refrigerant flowing from the liquid pipe to the gas pipe, the distributor is disposed downstream of the ejector.
[0018] Optionally, the heat exchanger assembly further includes at least two second connection pipelines; wherein, each second heat exchange pipeline is connected to the gas pipe through a corresponding second connection pipeline; temperature sensors are disposed on the at least two second connection pipelines, and temperature signals of the temperature sensors are used to control the working state of the ejector; the working state includes an activation state and a shutdown state.
[0019] Optionally, the heat exchanger assembly further includes an end plate, and the first heat exchange pipeline and the at least two second heat exchange pipelines are disposed on the end plate.
[0020] The present application also provides an air conditioner, including the heat exchanger assembly as described above.
[0021] In the technical solution of the embodiment of the present application, when the liquid refrigerant is input into the heat exchanger through the liquid pipe in the heat exchanger assembly, the dryness of the liquid refrigerant in the first heat exchange pipeline is low, mainly liquid refrigerant, the refrigerant flow rate is high, the pressure drop loss caused is small, and the boiling heat transfer coefficient is significantly increased; then, in the process of heat exchange with air, the liquid refrigerant is gradually vaporized, the dryness gradually rises, and the incremental ratio of the pressure drop loss generated by the gaseous refrigerant is gradually higher than the improvement ratio of the convective heat transfer coefficient in the pipe. Therefore, at least two parallel second heat exchange pipelines are provided to reduce the refrigerant flow rate to reduce the pressure drop loss, so that the pressure drop loss and the convective heat transfer coefficient are matched; the gaseous refrigerant after heat exchange through at least two second heat exchange pipelines is led out of the heat exchanger assembly through the gas pipe, thereby ensuring that the heat exchange efficiency of the heat exchanger assembly is in the best state. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.
[0023] Figure 1 FIG. is a schematic diagram of a heat exchanger assembly for introducing refrigerant from a liquid pipe according to an embodiment of the present application;
[0024] Figure 2 Schematic diagram of a refrigerant entering the heat exchanger assembly from the gas pipe proposed in an embodiment of the present application;
[0025] Figure 3 Another schematic diagram of a refrigerant entering the heat exchanger assembly from the liquid pipe proposed in an embodiment of the present application;
[0026] Figure 4 Another schematic diagram of a refrigerant entering the heat exchanger assembly from the gas pipe proposed in an embodiment of the present application;
[0027] Figure 5 Schematic diagram of the control structure of the ejector in the heat exchanger assembly in an embodiment of the present application.
[0028] List of reference numerals
[0029] 100 Heat exchanger assembly 150 First connecting pipeline 110 Liquid pipe 160 Second connecting pipeline 120 First heat exchange pipeline 170 End plate 130 Second heat exchange pipeline 180 Distributor 121 First pipeline 190 Injector 131 Second pipeline 200 Controller 140 Gas pipe T Temperature sensor Detailed implementation manners
[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.
[0032] In the present application, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0033] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.
[0034] Referring to Figure 1 As shown, an embodiment of the present application provides a heat exchanger assembly 100, including:
[0035] A liquid pipe 110 for transporting liquid refrigerant;
[0036] A first heat exchange pipe 120, the first end of the first heat exchange pipe 120 is connected to the liquid pipe 110;
[0037] At least two second heat exchange pipes 130, the at least two second heat exchange pipes 130 are connected in parallel and connected to the second end of the first heat exchange pipe 120; and
[0038] An air pipe 140, the air pipe 140 is connected to the at least two second heat exchange pipes 130 for transporting gaseous refrigerant.
[0039] In the technical solution of the embodiment of the present application, as Figure 1 shown, when the heat exchanger assembly 100 inputs liquid refrigerant into the heat exchanger through the liquid pipe 110, the dryness of the liquid refrigerant in the first heat exchange pipe 120 is low, mainly liquid refrigerant, the refrigerant flow rate is high, the pressure drop loss caused is small, and the boiling heat transfer coefficient increases significantly; then during the heat exchange process with air, the liquid refrigerant is gradually vaporized and the dryness gradually rises, and the incremental ratio of the pressure drop loss generated by the gaseous refrigerant is gradually higher than the ratio of the increase in the convective heat transfer coefficient inside the pipe. Therefore, by setting at least two second heat exchange pipes 130 connected in parallel to reduce the refrigerant flow rate to reduce the pressure drop loss, the pressure drop loss and the convective heat transfer coefficient are matched; the gaseous refrigerant after heat exchange through the at least two second heat exchange pipes 130 is led out of the heat exchanger assembly 100 through the air pipe 140, thereby ensuring that the heat exchange efficiency of the heat exchanger assembly 100 is in the best state.
[0040] The above embodiment is the working principle of the heat exchanger assembly 100 as an outdoor heat exchanger when the air conditioner is heating.
[0041] Referring to Figure 2 as shown, in the above embodiment, when the heat exchanger assembly 100 is used as an outdoor heat exchanger and the air conditioner is cooling, the working principle is as follows: the refrigerant state of the outdoor heat exchanger changes from high-temperature and high-pressure gas to high-temperature and high-pressure liquid, and the change in refrigerant dryness is opposite to that in heating. At this time, the refrigerant with a higher dryness should be first transported through multiple parallel second heat exchanger pipelines, and then after the dryness decreases, it is merged into the first heat exchange pipeline 120, so that the heat exchanger also has good heat exchange performance during cooling.
[0042] As an alternative embodiment of the above embodiment, the first heat exchange pipeline 120 includes a plurality of first pipes 121, and the plurality of first pipes 121 are connected in series in sequence; the second heat exchange pipeline 130 includes a plurality of second pipes 131, and the plurality of second pipes 131 are connected in series in sequence; wherein, the number of the first pipes 121 is less than the number of the second pipes 131. In the embodiment, compared with the number of the second pipelines in the second heat exchange pipeline 130, the number of the first pipes 121 in the first heat exchange pipeline 120 is set to be less, so that when the refrigerant vaporizes from liquid to gas, its flow rate is appropriately increased, and the boiling heat transfer coefficient increases significantly.
[0043] In this embodiment, the plurality of first pipes 121 and the plurality of second pipes 131 can be copper pipes. For example, as Figure 1 shown, the number of the first pipes 121 is 8, and the number of the second pipes 131 is 12.
[0044] As an alternative embodiment of the above embodiment, referring to Figure 1 and Figure 2 shown, the number of the second pipes 131 of the at least two second heat exchange pipelines 130 is the same. In the embodiment, the number of the second pipes 131 of the at least two heat exchange pipelines is set to be the same, ensuring that in the at least two second heat exchange flow paths, the flow resistance of the refrigerant is the same, facilitating that the refrigerant can have basically the same heat exchange working conditions during heat exchange, and making the state of the refrigerant flowing into the gas pipe 140 (or flowing into the first heat exchange flow path) through the at least two second heat exchange pipelines 130 be basically consistent.
[0045] As an alternative embodiment of the above embodiment, referring to Figure 1 and Figure 2 shown, the first heat exchange pipeline 120 and the at least two second heat exchange pipelines 130 are sequentially arranged at intervals along the height direction of the heat exchanger assembly 100. In the air conditioner, the heat exchanger is placed vertically, and the first heat exchange pipeline 120 and the at least two heat exchange pipelines are sequentially arranged at intervals along the height direction of the heat exchanger assembly 100, facilitating heat exchange between the air and the heat exchanger assembly 100.
[0046] For example, as Figures 1 to 4As shown, there are three second heat exchange pipelines 130, and the first heat exchange pipeline 120 and the three second heat exchange pipelines 130 are sequentially arranged at intervals in the height direction.
[0047] As an alternative implementation of the above embodiment, referring to Figure 1 and Figure 2 As shown, the heat exchanger assembly 100 further includes a first connection pipeline 150; the at least two heat exchange pipelines are connected to the second end of the first heat exchange pipeline 120 through the first connection pipeline 150. In the embodiment, after passing through the first heat exchange flow path, the liquid refrigerant is vaporized and the dryness increases, and then the refrigerant with increased dryness is respectively transported into different heat exchange pipelines through the first connection pipeline 150.
[0048] As an alternative implementation of the above embodiment, referring to Figure 3 and Figure 4 As shown, the heat exchanger assembly 100 further includes an ejector 190 and / or a distributor 180, and the ejector 190 and / or the distributor 180 are arranged on the first connection pipeline 150. In the embodiment, the distributor 180 is used to transport the refrigerant flowing out of the first heat exchange pipeline 120 into different second heat exchange pipelines more evenly; while the ejector 190 is used to pressurize the refrigerant so that the refrigerant overcomes gravity or crossflow.
[0049] As an alternative implementation of the above embodiment, referring to Figure 3 and Figure 4 As shown, the first end of the distributor 180 is connected to the ejector 190; the distributor 180 has at least two second ends, and each second heat exchange pipeline 130 is connected to the corresponding second end; wherein, in the direction of the refrigerant flowing from the liquid pipe 110 to the gas pipe 140, the distributor 180 is arranged downstream of the ejector 190. In the embodiment, the refrigerant after being jet-pressurized by the ejector 190 is evenly input into different second heat exchange pipelines through the distributor 180, so that the refrigerant overcomes the influence of gravity or crossflow and can flow into each branch more evenly through the distributor 180, reducing the useless vaporization and liquid machine phenomena caused by uneven distribution and other problems that reduce the reliability and energy efficiency of the air-conditioning system.
[0050] As an alternative implementation of the above embodiment, referring to Figure 3 and Figure 4 As shown, the heat exchanger assembly 100 further includes at least two second connection pipelines 160. Among them, each second heat exchange pipeline 130 is connected to the gas pipe 140 through the corresponding second connection pipeline 160. Temperature sensors T are arranged on the at least two second connection pipelines 160, and the temperature signals of the temperature sensors T are used to control the working state of the ejector 190; the working state includes an activation state and a shutdown state. In the embodiment, asFigure 5 As shown, a temperature sensor T is provided on at least two of the connecting pipelines; the temperature signal of the temperature sensor T is received by the controller 200, and the controller 200 compares the temperature detection values corresponding to the temperature signals of the temperature sensors T on at least two of the connecting pipelines to obtain a temperature difference; if the temperature difference is within a set range, it indicates that the temperature values of the refrigerant medium in the second heat exchange pipeline 130 tend to be consistent. At this time, the ejector 190 can be controlled to be in a shutdown state; if the temperature difference is within the set range, it indicates that the temperature values of the refrigerant medium in the second heat exchange pipeline 130 deviate from each other. At this time, the ejector 190 can be controlled to be in an activated state so that the temperature values of the refrigerant medium in the second heat exchange pipeline 130 approach each other and tend to be consistent, reducing the useless vaporization and liquid machine phenomena caused by the temperature difference between branches, etc., and reducing the reliability and energy efficiency of the air-conditioning system.
[0051] As an alternative implementation of the above embodiment, referring to Figure 1 and Figure 2 As shown, the heat exchanger assembly 100 further includes end plates 170, and the first heat exchange pipeline 120 and the at least two second heat exchange pipelines 130 are provided on the end plates 170. In the embodiment, the heat exchanger assembly 100 usually has two end plates 170, which are divided into a left end plate 170 and a right end plate 170; the first heat exchange pipeline 120 and the at least two second heat exchange pipelines 130 are fixed by the left end plate 170 and the right end plate 170. In some embodiments, the distributor 180 and the ejector 190 can also be fixed by the (left or right) end plate 170.
[0052] The present application also proposes an air conditioner, including the heat exchanger assembly 100. The heat exchanger assembly 100 adopts a part or all of the technical solutions in the foregoing embodiment, and thus has a part or all of the technical advantages of the foregoing embodiment. The heat exchanger assembly 100 is connected to the refrigerant circulation system of the air conditioner. The heat exchanger assembly 100 can be used in an indoor unit of an air conditioner for heat exchange with indoor air. The heat exchanger assembly 100 can also be used in an outdoor unit of an air conditioner for exchange with outdoor air.
[0053] The above are only alternative embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made using the content of the specification and drawings of the present application under the application concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.
Claims
1. A heat exchanger assembly, characterized in that, Comprising: A liquid pipe for conveying a liquid refrigerant; A first heat exchange pipeline, with the first end of the first heat exchange pipeline connected to the liquid pipe; At least two second heat exchange pipelines, the at least two second heat exchange pipelines being connected in parallel and connected to the second end of the first heat exchange pipeline; and A gas pipe, the gas pipe being connected to the at least two second heat exchange pipelines for conveying a gaseous refrigerant.
2. The heat exchanger assembly according to claim 1, characterized in that, The first heat exchange pipeline includes a plurality of first pipes, and the plurality of first pipes are connected in series in sequence; The second heat exchange pipeline includes a plurality of second pipes, and the plurality of second pipes are connected in series in sequence; Wherein, the number of the first pipes is less than the number of the second pipes.
3. The heat exchanger assembly according to claim 2, characterized in that, The number of the second pipes of the at least two second heat exchange pipelines is the same.
4. The heat exchanger assembly according to claim 1, wherein, The first heat exchange pipeline and the at least two second heat exchange pipelines are sequentially arranged at intervals along the height direction of the heat exchanger assembly.
5. The heat exchanger assembly according to claim 1, characterized in that, The heat exchanger assembly further includes a first connection pipeline; the at least two heat exchange pipelines are connected to the second end of the first heat exchange pipeline through the first connection pipeline.
6. The heat exchanger assembly according to claim 5, wherein, The heat exchanger assembly further includes an ejector and / or a distributor, and the ejector and / or the distributor is arranged on the first connection pipeline.
7. The heat exchanger assembly according to claim 6, wherein The first end of the distributor is connected to the ejector; the distributor has at least two second ends, and each second heat exchange pipeline is connected to a corresponding second end; Wherein, in the direction of the refrigerant flowing from the liquid pipe to the gas pipe, the distributor is arranged downstream of the ejector.
8. The heat exchanger assembly according to claim 6 or 7, characterized in that, The heat exchanger assembly further includes at least two second connection pipelines; wherein, each second heat exchange pipeline is connected to the gas pipe through a corresponding second connection pipeline; temperature sensors are arranged on the at least two second connection pipelines, and the temperature signals of the temperature sensors are used to control the working state of the ejector; the working state includes an activation state and a shutdown state.
9. The heat exchanger assembly according to claim 1, characterized in that, The heat exchanger assembly further includes an end plate, and the first heat exchange pipeline and the at least two second heat exchange pipelines are arranged on the end plate.
10. An air conditioner, characterized in that, Comprising the heat exchanger assembly according to any one of claims 1 to 9.