Liquid water filtering device for condensing evaporator of automobile air conditioner

Abstract

The invention relates to a liquid water filtering device for a condensation evaporator of an automobile air conditioner, which belongs to the technical field of automobile air conditioners, is mounted on a heat dissipation belt of the evaporator, and comprises a frame and a filter arranged in the frame, the filter comprises a hydrophobic filter screen and a hydrophilic filter screen which are overlapped; a folding mountain formed by folding the hydrophobic filter screen and the hydrophilic filter screen is arranged in the gravity direction, and water guide grooves perpendicular to the folding mountain are formed in the two sides of the bottom of the frame. According to the liquid water filtering device for the condensation evaporator of the automobile air conditioner, condensate water and water mist droplets of the condensation evaporator of the automobile air conditioner can be effectively intercepted, dry and comfortable air can be provided for an automobile cabin, and the heat load of a downstream heating assembly of a new energy automobile is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air conditioners, and in particular to a liquid water filtering device for an automobile air conditioner condenser evaporator. Background Art

[0002] The automobile air conditioning system is one of the core key systems of the automobile. It can timely adjust the key parameters such as temperature, humidity, cleanliness, etc. of the air delivered to the cabin to ensure the riding comfort of passengers. So far, the installation rate of air conditioning in domestic cars has achieved full coverage.

[0003] In the automobile air conditioning system, the evaporator transfers the heat of the airflow through the air conditioning duct by using the phase change of the refrigerant from liquid to gas in its pipeline, thereby reducing the airflow temperature and realizing the cooling and dehumidification function of the air conditioning system. When the humidity in the air intake outside the car is high, a large amount of condensed water will be generated on the surface of the evaporator heat dissipation pipe. When a certain amount of air passes through, the above-mentioned large amount of condensed water and small water mist droplets will be brought into the downstream air duct and directly introduced into the cabin through the air outlet of the air conditioner, which deviates from the original intention of dehumidification and seriously affects the consumer experience; at the same time, for new energy vehicles, a heating component will be installed at the rear end of the evaporator, which will cooperate with the evaporator to provide dry, warm and comfortable airflow; the introduction of the above-mentioned condensed water and small water mist droplets will increase the energy consumption of the heating component and increase the load of the entire thermal management system. Therefore, it is necessary to deal with the condensed water and small water mist droplets generated on the evaporator in a timely manner to avoid affecting the subsequent components and consumer experience.

[0004] Conventional technology generally utilizes the principle of gravity to optimize the design of the evaporator heat dissipation pipe structure, adjusts the appropriate window angle and angle of the evaporator heat dissipation belt (CN 115451614 A), and makes it easier for condensed water to be diverted to the automatic drain outlet. However, small droplets or water films are still inevitably present on the surface of the evaporator pipe. Under a certain airflow speed, the phenomenon of the condensed water being brought into the downstream air duct still exists. Some patents disclose "an air conditioner anti-blow water structure" (CN 110239313 B), which uses a hydrophobic and hydrophilic filter to intercept condensed water. However, the above device only processes large droplets of condensed water, and does not solve small droplets or water mist, and cannot effectively remove small droplets. Summary of the invention

[0005] In order to intercept condensed water and small water mist droplets downstream of the evaporator in the air duct of an automobile air conditioner, the present invention provides a liquid water filter device for an automobile air conditioner condenser evaporator, which can provide dry air for the automobile cabin and reduce the heat load of the downstream heating components of new energy vehicles.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A liquid water filter device for a condenser evaporator of an automobile air conditioner is installed on a heat dissipation belt in a downstream wind duct of the evaporator. The filter device comprises a frame and a filter arranged in the frame; the filter comprises a superimposed hydrophobic filter screen and a hydrophilic filter screen;

[0008] The folded mountains formed by folding the hydrophobic filter and the hydrophilic filter are arranged along the gravity direction, and water guide grooves perpendicular to the folded mountains are arranged on both sides of the bottom of the frame;

[0009] The hydrophobic filter is located on the windward side to intercept the small droplets of condensed water blown out by the evaporator, and the hydrophilic filter is located on the leeward side to absorb the remaining small amount of unintercepted water mist to form a water film, which is then directed to the bottom of the filter device through the water guide groove. The particle size of the small droplets of condensed water is larger than the particle size of the droplets in the unintercepted water mist. For example, based on the PET24*24B8 mesh, the particle size of the small droplets of condensed water is greater than or equal to 0.35 mm, and the particle size of the unintercepted water mist is less than 0.35 mm.

[0010] Furthermore, the hydrophobic filter screen and the hydrophilic filter screen are both woven from polypropylene wires or PET polyester wires.

[0011] Furthermore, the polypropylene wire or the PET polyester wire has a skin-core structure.

[0012] Furthermore, the wire diameter of the wire is 0.03-0.2 mm.

[0013] Furthermore, the density of the wire is (15-30)*(15-30) wires / cm.

[0014] Furthermore, the structure of the woven hydrophobic filter screen and the hydrophilic filter screen is a plain weave structure, a honeycomb structure or a double-layer structure.

[0015] Furthermore, the slope of the water guide groove is 30-60°.

[0016] Furthermore, the hydrophobic filter screen and the hydrophilic filter screen are folded after being stacked, wherein the fold height is 3-30 mm and the fold distance is 2-15 mm.

[0017] Furthermore, the preparation method of the hydrophobic filter is: treating the filter with a hydrophobic agent to obtain a hydrophobic filter; wherein the hydrophobic agent is one or more of hexafluorocarbon hydrophobic functional agent 6S-TF2, acrylate X-309N or polyurethane 6S-NF9 BIO.

[0018] Furthermore, the preparation method of the hydrophilic filter is: treating the filter with a hydrophilic agent to obtain a hydrophilic filter; wherein the hydrophilic agent is one of anionic sodium lauryl sulfate, cationic hexadecyltrimethylammonium bromide, non-ionic polyoxyethylene lauryl ether, etc.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) The present invention provides a liquid water filtering device for an automobile air-conditioning condenser evaporator, which can effectively intercept condensed water and small water mist droplets of the automobile air-conditioning condenser evaporator, provide dry air for the automobile cabin, and reduce the heat load of the downstream heating components of the new energy vehicle;

[0021] (2) The present invention provides a liquid water filtering device for an automobile air-conditioning condenser evaporator. The device adopts a double-layer folded structure of a hydrophobic and hydrophilic filter in the filter, which can effectively intercept water droplets and block residual water vapor. The hydrophobic filter can intercept large water droplets and flow to the water guide groove. After the residual small water vapor penetrates the hydrophobic filter, it is intercepted by the second layer of hydrophilic filter to form a water film and flow to the water guide groove;

[0022] (3) The present invention provides a liquid water filter device for a condenser evaporator of an automobile air conditioner. The bottom of the frame of the device is designed with a water guide groove structure. The water guide groove forms a certain angle with the filter frame, which is conducive to the diversion of accumulated water. The optimal angle is 10-30°.

[0023] (4) The present invention provides a liquid water filtering device for an automobile air-conditioning condenser evaporator. The device has low cost, simple operation, and can be replaced regularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A processing flow chart of the automobile air-conditioning condenser evaporator liquid water filtering device provided by the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of area A in the middle;

[0026] Figure 3 A schematic diagram of a liquid water filtering device for a condenser evaporator of an automobile air conditioner provided by the present invention;

[0027] As shown in the figure: 1-hydrophobic filter; 2-hydrophilic filter; 3-hot pressing roller; 4-composite filter; 5-filter; 6-frame; 7-water guide groove; 8-air conditioning condenser evaporator; 9-filter device; 10-water-absorbent cotton; α-slope of water guide groove. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0029] In order to intercept the condensed water and water mist droplets downstream of the evaporator in the air duct of the automobile air conditioner, this embodiment provides a liquid water filter device for the condenser evaporator of the automobile air conditioner. The device is installed on the heat dissipation belt of the evaporator. The specific structure is shown in Figure 1-3 The filtering device includes a frame 6 and a filter 5 disposed in the frame 6; the filter 5 includes a hydrophobic filter 1 and a hydrophilic filter 2 superimposed on each other;

[0030] The folded mountains formed by folding the hydrophobic filter 1 and the hydrophilic filter 2 are arranged along the gravity direction, and water guide grooves 7 perpendicular to the folded mountains are arranged on both sides of the bottom of the frame 6;

[0031] Among them, the hydrophobic filter 1 is on the windward side, intercepting the small droplets of condensed water blown out by the evaporator, and the hydrophilic filter 2 is on the leeward side, adsorbing the remaining small amount of unintercepted water mist to form a water film, and guiding it to the bottom of the filter device through the water guide groove. Taking the PET24*24B8 net as an example, the particle size of the small droplets of condensed water is greater than or equal to 0.35mm, and the particle size of the unintercepted water mist is less than 0.35mm.

[0032] In this embodiment, the hydrophobic filter 1 and the hydrophilic filter 2 are both woven from polypropylene wires or PET polyester wires; the polypropylene wires or the PET polyester wires have a skin-core structure; the wire diameter of the wires is 0.03-0.2 mm; the density of the wires is (15-30)*(15-30) roots / cm; the structure of the woven hydrophobic filter 1 and the hydrophilic filter 2 is a plain weave structure, a honeycomb structure or a double-layer structure.

[0033] In this embodiment, the slope of the water guide groove 7 is 30-60°.

[0034] In this embodiment, the hydrophobic filter screen 1 and the hydrophilic filter screen 2 are folded after being stacked, wherein the fold height is 3-30 mm and the fold distance is 2-15 mm.

[0035] In this embodiment, the preparation method of the hydrophobic filter 1 is: treating the filter with a hydrophobic agent to obtain the hydrophobic filter 1; wherein the hydrophobic agent is one or more of hexafluorocarbon hydrophobic functional agent 6S-TF2, acrylate X-309N or polyurethane 6S-NF9BIO.

[0036] In this embodiment, the preparation method of the hydrophilic filter 2 is: treating the filter with a hydrophilic agent to obtain the hydrophilic filter 2; wherein the hydrophilic agent is one of anionic sodium lauryl sulfate, cationic hexadecyltrimethylammonium bromide, non-ionic polyoxyethylene lauryl ether, etc.

[0037] Example 1

[0038] The hydrophobic filter screen 1 of this embodiment is made of a mesh woven from polyester PET wire with a skin-core structure, the wire diameter is 0.08mm, the density of the mesh is 20*20 strands / cm in warp direction*weft direction, the hydrophobic agent is carbon hexafluoro 6S-TF2, the ratio of which to water is 6:94, and the processing method is spraying from bottom to top.

[0039] The hydrophilic filter screen 2 of the present embodiment is made of a mesh woven from polyester PET wire with a skin-core structure, with a wire diameter of 0.08 mm and a mesh density of 20*20 strands / cm in warp direction*weft direction. The PET wire mesh itself has a certain hydrophilicity, but in order to make it easier for the intercepted small droplets to form a water film, this layer of the mesh is treated with a hydrophilic agent. The hydrophilic agent uses a cationic quaternary ammonium salt LBS in a ratio of 3:97 to water, and the processing method is spraying from bottom to top.

[0040] The hydrophobic filter screen 1 and the hydrophilic filter screen 2 of this embodiment are melt-bonded by a hot pressing roller 3, and the temperature of the hot pressing roller 3 is set to 180°C to obtain a composite filter screen 4, which is folded into a filter 5. The filter 5 has a folding height of 20 mm, a folding distance of 10 mm, a length of 170 mm, and a width of 170 mm. At the same time, a water guide trough 7 with a certain slope is installed on both sides of the bottom frame of the filter 5 perpendicular to the folding direction, and the slope is about 30°, to obtain a filter device 9.

[0041] The filter device 9 is installed in the automobile air-conditioning condenser evaporator channel, and its direction is parallel to the air-conditioning condenser evaporator 8. The filter 5 is folded along the gravity direction, the windward side is the hydrophobic filter 1, and the leeward side is the hydrophilic filter 2.

[0042] When testing the water vapor interception effect, a water-absorbing cotton 10 of the same size as the filter device 9 is installed 5 cm outside the air-conditioning condenser evaporator 8 and the filter device 9. The air-conditioning condenser evaporator is turned on, and the changes in the quality of the water-absorbing cotton before and after the installation of the hydrophobic and hydrophilic filter are compared.

[0043] Example 2

[0044] The other steps are the same as those in Example 1, except that the density of the materials of the hydrophobic filter screen 1 and the hydrophilic filter screen 2 is 24*24 strands / cm.

[0045] Example 3

[0046] The other steps are the same as those in Example 1, except that the density of the materials of the hydrophobic filter screen 1 and the hydrophilic filter screen 2 is 15*15 strands / cm.

[0047] Comparative Example 1

[0048] The other steps are the same as those in Example 1, except that the materials of the hydrophobic filter screen 1 and the hydrophilic filter screen 2 are replaced with ordinary PET polyester mesh.

[0049] Comparative Example 2

[0050] The other steps and materials are the same as those in Example 1, except that the folding direction of the filter 5 is perpendicular to the direction of gravity.

[0051] Comparative Example 3

[0052] The other steps are the same as those in Example 1, except that the filter material is only made of the hydrophobic filter screen 1.

[0053] Comparative Example 4

[0054] The other steps are the same as those in Example 1, except that the filter material is only folded using the hydrophilic filter mesh 2.

[0055] Test Case

[0056] When testing the water vapor interception effect, install a super absorbent cotton of the same size as filter 5 at 5 cm outside the air conditioner condenser evaporator and the filter. Turn on the fan and blow it toward the evaporator with condensed water. Run for 10 minutes, stop, and compare the changes in the mass of the absorbent cotton before and after the installation of the hydrophobic and hydrophilic filter. The mass of the dry absorbent cotton is 4.33 g. The test results of the embodiment and the comparative example are shown in Table 1, and the test device is shown in Table 2. Figure 3 .

[0057] Table 1

[0058]

[0059] From the analysis of Table 1, we can see that:

[0060] If no filter is placed, the condensed water blown out from the air conditioner condenser evaporator will be completely absorbed by the absorbent cotton, and the mass of the absorbed water is 3.98g;

[0061] In Example 1, the density of the filter screen used is 20*20 roots / cm. The filter is made with a hydrophobic filter screen on the water-facing side and a hydrophilic filter screen on the leeward side. The filter pressure loss is 1.8Pa (wind speed 1m / s). The condensed water blown out from the air-conditioning condenser evaporator 8 is intercepted by large droplets through the hydrophobic filter screen 1, and small water vapor forms a water film through the hydrophilic filter screen 2, and flows along the fold of the filter 5 to the bottom of the filter 5 and is guided away. Therefore, very little water vapor leaks out and is absorbed by the absorbent cotton. The weight gain of the absorbent cotton is only 0.5 grams.

[0062] In Example 2, the filter density used is 24*24 threads / cm, and the rest is the same as in Example 1. As the density increases, the pressure loss of the filter increases, which is beneficial to the interception of water vapor, and the weight gain of the absorbent cotton is only 0.18 grams.

[0063] In Example 3, the filter density used is 15*15 threads / cm, and the rest is the same as in Example 1. Due to the reduction in density, the pressure loss of the filter 5 is also reduced, which is only 1.2Pa, but small-sized droplets can more easily pass through the filter, resulting in the weight increase of the absorbent cotton to 0.79 grams.

[0064] In comparative example 1, the material is replaced with ordinary PET polyester material without hydrophilic and hydrophobic treatment. The water vapor interception effect is greatly reduced and the weight gain reaches 2.88 grams.

[0065] In comparative example 2, the placement direction of the filter 5 in the channel is changed to be perpendicular to the direction of gravity. Although the water vapor can be well intercepted, the water folding mountain is perpendicular to the direction of gravity, so that the intercepted water droplets gather on the folding mountain, accumulating more and more. With the continuous blowing of wind volume, some water droplets will pass through the filter 5 and be absorbed by the absorbent cotton, and the weight increase to 1.56 grams.

[0066] In comparative example 3, the filter density used is 20*20 roots / cm, the single layer is treated with hydrophobicity, and then processed into a filter. Due to the small pressure loss and the lack of hydrophilic filter 2 on the back, the small water vapor that passes through cannot be intercepted, so the weight increase is greater than that of example 1, which is 0.83 grams.

[0067] In comparative example 4, the filter density used is 20*20 roots / cm, the single layer is hydrophilic treated, and then processed into a filter with small pressure loss. There is no hydrophobic filter 1 on the windward side to intercept large droplets, and only a small part of the water vapor is intercepted, so the weight gain reaches 3.32 grams.

[0068] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A liquid water filter device for a condenser evaporator of an automobile air conditioner, installed in the downstream wind duct of the evaporator, the filter device comprises a frame (6), characterized in that: It also includes a filter (5) arranged in the frame (6); the filter (5) includes a hydrophobic filter screen (1) and a hydrophilic filter screen (2) superimposed on each other; The folded mountains formed by folding the hydrophobic filter (1) and the hydrophilic filter (2) are arranged along the gravity direction, and water guide grooves (7) perpendicular to the folded mountains are arranged on both sides of the bottom of the frame (6); The hydrophobic filter (1) is located on the windward side to intercept the small droplets of condensed water blown out by the evaporator, and the hydrophilic filter (2) is located on the leeward side to absorb the remaining small amount of unintercepted water mist to form a water film, which is then guided to the bottom of the filter device through the water guide groove (7).

2. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 1 is characterized in that: The hydrophobic filter screen (1) and the hydrophilic filter screen (2) are both made of polypropylene wire or PET polyester wire.

3. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 2, characterized in that: The polypropylene wire or the PET polyester wire has a sheath-core structure.

4. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 2, characterized in that: The wire diameter of the wire is 0.03-0.2 mm.

5. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 2, characterized in that: The density of the wire is (15-30)*(15-30) wires / cm.

6. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 2, characterized in that: The structure of the woven hydrophobic filter screen (1) and the hydrophilic filter screen (2) is a plain weave structure, a honeycomb structure or a double-layer structure.

7. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 1, characterized in that: The slope of the water guide groove (7) is 30-60°.

8. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 1, characterized in that: The hydrophobic filter (1) and the hydrophilic filter (2) are folded after being stacked, wherein the fold height is 3-30 mm and the fold distance is 2-15 mm.

9. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 1, characterized in that: The preparation method of the hydrophobic filter (1) is as follows: treating the filter with a hydrophobic agent to obtain the hydrophobic filter (1); wherein the hydrophobic agent is one or more of hexafluorocarbon hydrophobic functional agent 6S-TF2, acrylate X-309N or polyurethane 6S-NF9 BIO.

10. The automobile air-conditioning condenser evaporator liquid water filtering device according to claim 1, characterized in that: The preparation method of the hydrophilic filter (2) is: treating the filter with a hydrophilic agent to obtain the hydrophilic filter (2); wherein the hydrophilic agent is one or more of anionic sodium lauryl sulfate, cationic hexadecyltrimethylammonium bromide or non-ionic polyoxyethylene lauryl alcohol ether.

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