Liquid pipe assembly for enhancing heating in air conditioner

Abstract

The utility model discloses a liquid pipe assembly for enhancing heating in an air conditioner, which belongs to the technical field of air conditioners and comprises a capillary tube communicated with an evaporator, a liquid separator communicated with the capillary tube, a first filter communicated with the downstream of the liquid separator, an expansion valve communicated with the downstream of the first filter, and a second filter communicated with the downstream of the expansion valve. The air conditioner is characterized by further comprising a heating auxiliary branch, the inlet end of the heating auxiliary branch is located between the first filter and the expansion valve and communicated with the liquid pipe between the first filter and the expansion valve, and the outlet end of the heating auxiliary branch is located between the second filter and the expansion valve and communicated with the liquid pipe between the second filter and the expansion valve. The liquid pipe is arranged between the second filter and the expansion valve. According to the heat exchanger, the flow of refrigerant fluid can be greatly increased, and meanwhile heat exchange of the refrigerant fluid is more sufficient; the inclined finned tubes are easy to clean, and the heat exchange efficiency cannot be affected by dirt accumulation after long-time use.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, and in particular relates to a liquid pipe assembly for enhancing heating in an air conditioner. Background Technology

[0002] Currently, in air conditioners that can both cool and heat, conventional liquid pipe assemblies cannot achieve maximum efficiency during heating operation due to the low flow rate of the expansion valve. When the refrigerant gas flows through the indoor unit's heat exchanger, some unliquefied refrigerant will also flow into the entire liquid pipe assembly through the capillary tube, forming a gas-liquid mixed refrigerant fluid. The flow rate of the refrigerant fluid will decrease when it passes through the expansion valve, because only when the refrigerant flow rate of the refrigerant fluid is at a higher level can the air conditioner achieve higher heating efficiency under heating conditions.

[0003] Therefore, there is an urgent need to design a liquid pipe assembly for enhanced heating in air conditioners to solve the problem mentioned above, which is that the refrigerant fluid has a low flow rate in conventional liquid pipe assemblies, resulting in poor heating efficiency of air conditioners. Utility Model Content

[0004] To address the technical problem mentioned in the background art, where the refrigerant flow rate in conventional liquid pipe assemblies is low, resulting in poor air conditioning heating efficiency, a liquid pipe assembly for enhanced heating in an air conditioner is provided to solve the aforementioned problem.

[0005] To achieve the above objectives, the specific technical solution of the liquid pipe assembly for enhanced heating in an air conditioner according to this utility model is as follows:

[0006] A liquid pipe assembly for enhanced heating in an air conditioner includes a capillary tube connected to an evaporator, a distributor connected to the capillary tube, a first filter connected downstream of the distributor, an expansion valve connected downstream of the first filter, a second filter connected downstream of the expansion valve, and an outdoor unit connected downstream of the second filter. The assembly also includes a heating auxiliary branch, the inlet of which is located between the first filter and the expansion valve and connected to the liquid pipe between the first filter and the expansion valve, and the outlet of which is located between the second filter and the expansion valve and connected to the liquid pipe between the second filter and the expansion valve.

[0007] Furthermore, the heating auxiliary branch includes finned tubes, and the refrigerant fluid entering the heating auxiliary branch undergoes heat exchange through the finned tubes before flowing into the second filter.

[0008] Furthermore, the fins on the finned tube are oblique fins.

[0009] Furthermore, the heating auxiliary branch includes a solenoid valve, which is installed upstream of the finned tube to control the opening and closing of the heating auxiliary branch.

[0010] Furthermore, the heating auxiliary branch includes a one-way valve, which is installed downstream of the finned tube.

[0011] Furthermore, the inlet end of the heating auxiliary branch is connected to the liquid pipe between the first filter and the expansion valve via a T-shaped tee.

[0012] Furthermore, the inlet end of the heating auxiliary branch is connected to the liquid pipe between the first filter and the expansion valve via a Y-type tee.

[0013] Furthermore, the outlet end of the heating auxiliary branch is connected to the liquid pipe between the second filter and the expansion valve via a T-shaped tee.

[0014] Furthermore, welding is used to connect the various components.

[0015] The liquid pipe assembly for enhanced heating inside an air conditioner according to this invention has the following advantages:

[0016] This invention can significantly increase the refrigerant flow rate while allowing the refrigerant to exchange heat more fully, thereby improving heating efficiency. At the same time, the inclined finned tube provides a larger heat exchange area compared to the flat finned tube and is equally easy to clean, preventing the accumulation of dirt over long-term use from affecting heat exchange efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the liquid pipe assembly for enhanced heating in an air conditioner according to this utility model.

[0018] Figure 2 This is a schematic diagram of the finned tube structure of this utility model.

[0019] The markings in the diagram are as follows: 1. Capillary tube; 2. Dispenser; 3. First filter; 4. Expansion valve; 5. Second filter; 6. Heating auxiliary branch; 601. Finned tube; 6011. Inclined fin; 602. Solenoid valve; 603. Check valve; 7. T-type tee; 8. Y-type tee. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0022] The following is a reference to the appendix. Figure 1 To be continued Figure 2 This invention describes a liquid pipe assembly for enhanced heating in an air conditioner.

[0023] In air conditioners that can both cool and heat, conventional liquid pipe assemblies cannot achieve maximum efficiency during heating operation due to the low flow rate of expansion valve 4. When the refrigerant gas flows through the indoor unit heat exchanger, some unliquefied refrigerant will also flow into the entire liquid pipe assembly through capillary tube 1, forming a gas-liquid mixed refrigerant fluid. The flow rate of the refrigerant fluid will decrease when it passes through expansion valve 4, because only when the refrigerant flow rate of the refrigerant fluid is in a higher state can the air conditioner achieve higher heating efficiency. However, due to the structural limitations of expansion valve 4, it is difficult for the refrigerant flow rate to be in a higher state.

[0024] Therefore, this utility model provides a liquid pipe assembly for enhancing heating in an air conditioner, such as... Figure 1 As shown, the system includes a capillary tube 1 connected to the evaporator, a distributor 2 connected to the capillary tube 1, a first filter 3 connected downstream of the distributor 2, an expansion valve 4 connected downstream of the first filter 3, a second filter 5 connected downstream of the expansion valve 4, and a heating auxiliary branch 6. The inlet of the heating auxiliary branch 6 is located between the first filter 3 and the expansion valve 4, and is connected to the liquid pipe between the first filter 3 and the expansion valve 4. The outlet of the heating auxiliary branch 6 is located between the second filter 5 and the expansion valve 4, and is connected to the liquid pipe between the second filter 5 and the expansion valve 4. Specifically... In other words, under heating conditions, the refrigerant enters through the capillary tube 1 and passes through the distributor 2 and the first filter 3 in sequence. At the inlet of the heating auxiliary branch 6, the refrigerant is split, with one part flowing into the expansion valve 4 and the other part flowing into the heating auxiliary branch 6. The flow rate of the refrigerant flowing into the heating auxiliary branch 6 is much greater than that flowing into the expansion valve 4. The two parts of the refrigerant flow converge at the outlet of the heating auxiliary branch 6 and enter the second filter 5, and finally flow into the outdoor unit. This greatly increases the refrigerant flow rate into the outdoor unit per unit time, thereby increasing the air conditioning heating efficiency.

[0025] As a preferred option, such as Figure 1As shown, the heating auxiliary branch 6 includes a finned tube 601. The refrigerant fluid entering the heating auxiliary branch 6 undergoes heat exchange through the finned tube 601 and then flows into the second filter 5. Specifically, the refrigerant entering the heating auxiliary branch 6 is a gas-liquid mixed refrigerant fluid. After passing through the finned tube 601, the gas-liquid mixed refrigerant fluid undergoes heat exchange, thereby causing the gaseous refrigerant to liquefy and release heat again, thus enabling the refrigerant fluid to exchange heat as fully as possible into liquid refrigerant, thereby improving heating efficiency.

[0026] As a preferred option, such as Figure 2 As shown, the fins on the finned tube 601 are oblique fins 6011. Specifically, oblique finned tubes provide a larger heat exchange area than flat finned tubes and are equally easy to clean, avoiding the problem of dirt accumulation over long-term use that affects heat exchange efficiency.

[0027] As a preferred option, such as Figure 1 As shown, the heating auxiliary branch 6 includes a solenoid valve 602, which is installed upstream of the finned tube 601 to control the opening and closing of the heating auxiliary branch 6. Specifically, in the cooling mode, the solenoid valve 602 is closed to prevent the refrigerant fluid flowing out of the outdoor unit from entering the heating auxiliary branch 6 from the inlet end of the heating auxiliary branch 6.

[0028] Preferably, the heating auxiliary branch 6 includes a one-way valve 603, which is installed downstream of the finned tube 601. Specifically, in cooling mode, the one-way valve 603 prevents the refrigerant fluid flowing out of the outdoor unit from entering the heating auxiliary branch 6 from the outlet end of the heating auxiliary branch 6.

[0029] Optionally, the inlet end of the heating auxiliary branch 6 is connected to the liquid pipe between the first filter 3 and the expansion valve 4 through a T-shaped tee 7, thereby realizing the diversion of refrigerant fluid under heating conditions.

[0030] As a preferred option, such as Figure 1 As shown, the inlet end of the heating auxiliary branch 6 is connected to the liquid pipe between the first filter 3 and the expansion valve 4 through the Y-type tee 8. During the flow of refrigerant fluid, the branch angle of the Y-type tee makes the refrigerant fluid turn relatively gently. When the refrigerant fluid enters the branch pipe from the main pipe of the Y-type tee 8, the streamline changes naturally, and the local resistance coefficient generated is small, thereby increasing the flow rate of the refrigerant fluid.

[0031] Preferably, the outlet end of the heating auxiliary branch 6 is connected to the liquid pipe between the second filter 5 and the expansion valve 4 via a T-shaped tee 7, thereby realizing the convergence of refrigerant fluid under heating conditions.

[0032] Preferably, the present invention uses welding to connect the various components, thereby preventing leakage due to the increased number of connections caused by the addition of the finned tube 601.

[0033] In one specific embodiment, such as Figure 1 As shown, during air conditioning heating operation, the refrigerant fluid flows through capillary tube 1, distributor 2, and first filter 3 before flowing to Y-type tee 8. At this time, a small portion of the refrigerant fluid flows through expansion valve 4 to the second filter 5 and then into the outdoor unit. Due to the presence of check valve 603, the refrigerant fluid is not diverted at T-type tee 7 and flows to finned tube 601. Instead, a larger portion of the refrigerant fluid flows through solenoid valve 602 to finned tube 601. The refrigerant fluid that is not fully liquefied in finned tube 601 can also liquefy again and release heat. Then, it flows through check valve 603 to T-type tee 7 and merges with the refrigerant fluid flowing out of expansion valve 4 before flowing to the outdoor unit. Compared to conventional liquid pipe assemblies where the refrigerant flows directly to the expansion valve 4 and then into the outdoor unit, this invention significantly increases the refrigerant flow rate while allowing for more thorough heat exchange, thereby improving heating efficiency. Simultaneously, the inclined finned tubes provide a larger heat exchange area compared to flat finned tubes and are equally easy to clean, preventing the accumulation of dirt over time from affecting heat exchange efficiency. In cooling mode, when the refrigerant flowing from the outdoor unit into the liquid pipe assembly, the solenoid valve 602 can be closed via program control. At this time, under the combined action of the check valve 603 and the solenoid valve 602, the refrigerant will not flow in the heating direction.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A liquid pipe assembly for enhanced heating in an air conditioner, comprising a capillary tube connected to an evaporator, a distributor connected to the capillary tube, a first filter connected downstream of the distributor, an expansion valve connected downstream of the first filter, a second filter connected downstream of the expansion valve, and the second filter connected downstream of the second filter to an outdoor unit, characterized in that, It also includes a heating auxiliary branch, the inlet of which is located between the first filter and the expansion valve and is connected to the liquid pipe between the first filter and the expansion valve, and the outlet of which is located between the second filter and the expansion valve and is connected to the liquid pipe between the second filter and the expansion valve.

2. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 1, characterized in that, The heating auxiliary branch includes finned tubes. The refrigerant fluid entering the heating auxiliary branch undergoes heat exchange through the finned tubes and then flows into the second filter.

3. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 2, characterized in that, The fins on the finned tube are oblique fins.

4. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 2, characterized in that, The heating auxiliary branch includes a solenoid valve, which is installed upstream of the finned tube to control the opening and closing of the heating auxiliary branch.

5. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 2 or 4, characterized in that, The heating auxiliary branch includes a check valve, which is installed downstream of the finned tube.

6. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 1, characterized in that, The inlet of the heating auxiliary branch is connected to the liquid pipe between the first filter and the expansion valve via a T-shaped tee.

7. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 1, characterized in that, The inlet end of the heating auxiliary branch is connected to the liquid pipe between the first filter and the expansion valve via a Y-type tee.

8. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 1, characterized in that, The outlet end of the heating auxiliary branch is connected to the liquid pipe between the second filter and the expansion valve via a T-shaped tee.

9. The liquid pipe assembly for enhanced heating in an air conditioner according to claim 1, characterized in that, The components are connected by welding.

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