Composite filter element material for pet water drinking device, filter element and pet water drinking device

Abstract

The invention is suitable for the technical field of filter element materials, and discloses a composite filter element material for a pet water drinking device, a filter element and the pet water drinking device. The composite filter element material for the pet water drinking device comprises an activated carbon filter material and an ion exchange resin filter material, the activated carbon filter material is arranged on the upstream of the ion exchange resin filter material, and the ion exchange resin filter material comprises mixed bed resin and / or H-type resin. The composite filter element material provided by the invention not only can effectively remove harmful substances such as residual chlorine, peculiar smell, organic pollutants, part of pigments and the like in water, but also can soften water, so that the water is weakly acidic and is suitable for the physique of cats, and clean, low-mineral and safe drinking water is provided for cats.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter core materials, in particular to a composite filter core material for a pet water drinking device, a filter core and a pet water drinking device. BACKGROUND

[0002] With the improvement of living standards, raising pets has become an emotional companion and lifestyle for many families. As an important equipment to ensure the health of pets' daily drinking water, pet water drinking devices are increasingly favored by pet-keeping families. However, the filter cores used in most pet water drinking devices on the market have obvious deficiencies in core performance: they cannot effectively filter out harmful substances such as residual chlorine, heavy metals, and odors produced by bacterial metabolism. Especially for cats, due to their weak urinary system, they are more sensitive to water quality, and the existing filter cores cannot meet their specific requirements for clean, low-mineral, and safe drinking water. SUMMARY

[0003] The present application provides a composite filter core material for a pet water drinking device, a filter core and a pet water drinking device, aiming to solve the technical problem that existing pet water drinking devices cannot meet the drinking water requirements of cats.

[0004] According to a first aspect of the present application, a composite filter core material for a pet water drinking device is provided in some embodiments, comprising activated carbon filter material and ion exchange resin filter material, the activated carbon filter material being arranged upstream of the ion exchange resin filter material, and the ion exchange resin filter material comprising mixed bed resin and / or H-type resin. It should be noted that activated carbon is a high-porosity carbon material treated in a special way, which can efficiently adsorb residual chlorine, odors, organic pollutants, and part of pigments in water. Ion exchange resin is a high-molecular material with ion exchange function, which can remove inorganic ions in water through ion exchange. Among them, mixed bed resin is a mixed resin obtained by mixing H + type strong acid cation exchange resin and OH - type strong base anion exchange resin, which can effectively remove cations and anions in water. The cations in water are exchanged into H + when passing through the mixed bed resin, and the anions in water are exchanged into OH - when passing through the mixed bed resin. H-type resin refers to a strong acid cation exchange resin loaded with hydrogen ions (H + ), which can release H + on the resin to replace and remove cations (such as calcium, magnesium, sodium, potassium, etc.) in water through ion exchange reaction.

[0005] By arranging the ion exchange resin filter material to include mixed bed resin and / or H-type resin, H +The cat is prone to form urolithiasis bird droppings when the concentration of magnesium, phosphorus and ammonium ions in the urine is too high and the urine is alkaline. The setting of the mixed bed resin and / or H type resin removes the calcium and magnesium ions in the water, reduces the mineral source of the formation of bird droppings, and the bird droppings will dissolve in the acidic solution (pH<6.6). The mixed bed resin and / or H type resin makes the water body weakly acidic, which helps to dissolve the bird droppings.

[0006] Therefore, the composite filter material provided by the present application can effectively remove harmful substances such as residual chlorine, odors, organic pollutants and part of pigments in water, soften water quality, make the water quality weakly acidic suitable for the cat's body, and provide clean, low-mineral and safe drinking water for the cat.

[0007] In some embodiments, the activated carbon filter material is activated carbon fiber felt and / or activated carbon particles. Alternatively, the activated carbon filter material includes at least one of coconut shell activated carbon, coal activated carbon and fruit shell activated carbon.

[0008] In some embodiments, the activated carbon filter material is activated carbon fiber felt, and the thickness of the activated carbon filter material to the weight of the ion exchange resin filter material is (3mm-10mm):(60g-120g); preferably, the thickness of the activated carbon filter material to the weight of the ion exchange resin filter material is (5mm-8mm):(80g-100g). Alternatively, the activated carbon filter material is activated carbon particles, and the weight ratio of the activated carbon filter material to the ion exchange resin filter material is (5-30):(60-120); preferably, the weight ratio of the activated carbon filter material to the ion exchange resin filter material is (10-20):(80-100).

[0009] In some embodiments, the ion exchange resin filter material is composed of the following components by weight: H type resin (5-10) parts, Na type resin (60-80) parts. Alternatively, the ion exchange resin filter material includes, by weight: mixed bed resin (60-90) parts, H type resin (0-20) parts.

[0010] In some embodiments, the ion exchange resin filter material is a mixed bed resin. Alternatively, the ion exchange resin filter material is composed of the following components by weight: mixed bed resin (70-80) parts, H type resin (10-20) parts. Alternatively, the ion exchange resin filter material is composed of the following components by weight: mixed bed resin (60-70) parts, H type resin (10-20) parts, Mg type resin (10-20) parts.

[0011] In some embodiments, the ratio of the maximum filtered water volume of the composite filter material to the weight of the ion exchange resin filter material is (9L-20L):(60g-120g), and the flow rate of the water through the ion exchange resin filter material is 5min / L-18min / L; preferably, the ratio of the maximum filtered water volume of the composite filter material to the weight of the ion exchange resin filter material is (9L-16L):(80g-100g). Alternatively, the maximum filtered water volume of the composite filter material is 9L-20L, the weight of the ion exchange resin filter material is 60g-120g, and the flow rate of the water through the ion exchange resin filter material is 5min / L-18min / L; preferably, the weight of the ion exchange resin filter material is 80g-100g.

[0012] In some embodiments, when the driving force for driving the water flow is in the range of 0.02bar-0.05bar, the amount of the ion exchange resin filter material satisfies the following formula: wherein W represents the amount of the ion exchange resin filter material, V represents the daily water consumption of the pet, D represents the number of days of drinking water for the pet, K-water represents the tap water quality coefficient, E-pet represents the effective exchange capacity of the ion exchange resin filter material, and η-gravity represents the gravity efficiency coefficient.

[0013] According to the second aspect of the present application, in some embodiments, a filter core for a pet drinking water device is provided, comprising a shell having a water inlet and a water outlet, and the composite filter material of the first aspect, wherein the composite filter material is arranged in the shell, the activated carbon filter material is arranged close to the water inlet, and the ion exchange resin filter material is arranged close to the water outlet.

[0014] It should be noted that by using the above-mentioned composite filter material, the filter core can effectively remove harmful substances such as residual chlorine, odors, organic pollutants, and part of pigments in water, and can also soften the water quality to make the water quality weakly acidic, which is suitable for the cat's body, and provides clean, low-mineral, and safe drinking water for the cat.

[0015] According to the third aspect of the present application, in some embodiments, a pet drinking water device is provided, comprising the composite filter material of the first aspect or the filter core of the second aspect. In this way, the pet drinking water device can provide clean, low-mineral, and safe drinking water for the cat. In some embodiments, the pet water drinking device further comprises a water cup body and a raw water bearing container, the filter core is arranged between the water cup body and the raw water bearing container, the water cup body has a first accommodating cavity, the raw water bearing container has a second accommodating cavity, the filter core communicates the first accommodating cavity and the second accommodating cavity, and a volume of the second accommodating cavity is less than or equal to a volume of the first accommodating cavity. And / or, the pet is a cat.

[0016] The composite filter core material for the pet water drinking device, the filter core and the pet water drinking device provided by the application can release H+ into water in the process of ion exchange removing cations in water by arranging ion exchange resin filter material including mixed bed resin and / or H type resin. + The composite filter core material can not only remove harmful substances such as residual chlorine, peculiar smell, organic pollutants and part of pigments in water, but also soften water and make water weakly acidic, which reduces the source of minerals forming bird dropping stones and forms water quality conducive to the dissolution of bird dropping stones. Therefore, the composite filter core material provided by the application can provide clean, low-mineral and safe drinking water for cats. DETAILED DESCRIPTION

[0017] The application will be further described in detail below by specific embodiments combined with schemes. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases or replaced by other materials or methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art according to the description in the specification and general technical knowledge in the art.

[0018] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate way to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially changed or adjusted in a manner obvious to those skilled in the art. Therefore, the order in the specification and the schemes is only for clear description of a certain embodiment and does not mean a necessary order, unless otherwise stated that a certain order must be followed.

[0019] According to the first aspect of the application, in some embodiments, a composite filter core material for a pet water drinking device is provided, which comprises activated carbon filter material and ion exchange resin filter material, the activated carbon filter material is arranged upstream of the ion exchange resin filter material, and the ion exchange resin filter material comprises mixed bed resin and / or H type resin. It should be noted that activated carbon is a high porosity carbon material specially treated, which can efficiently adsorb residual chlorine, peculiar smell, organic pollutants, and part of pigments in water. Ion exchange resin is a high polymer material with ion exchange function, which can remove inorganic ions in water through ion exchange. Among them, the mixed bed resin is a mixed resin obtained by mixing H + type strong acid cation exchange resin and OH - type strong base anion exchange resin, which can effectively remove cations and anions in water. The cations in water are exchanged into H + when passing through the mixed bed resin, and the anions in water are exchanged into OH - . H type resin refers to a strong acid cation exchange resin loaded with hydrogen ions (H + ), which can release H + on the resin to replace and remove cations (such as calcium, magnesium, sodium, potassium, etc.) in water through ion exchange reaction.

[0020] By setting the ion exchange resin filter material including the mixed bed resin and / or H type resin, H + can be released into water in the process of removing cations in water through ion exchange, which can not only soften the water body, but also make the water body weakly acidic. Due to physiological characteristics, when the concentration of magnesium, phosphorus, and ammonium ions in the urine of cats is too high and the urine is alkaline, it is easy to form urolithiasis. By setting the mixed bed resin and / or H type resin to remove calcium and magnesium ions in water, the source of minerals forming urolithiasis is reduced, and urolithiasis will dissolve in an acidic solution (pH < 6.6). The use of mixed bed resin and / or H type resin makes the water body weakly acidic, which is helpful for the dissolution of urolithiasis.

[0021] Therefore, the composite filter core material provided by the present application can not only effectively remove harmful substances such as residual chlorine, peculiar smell, organic pollutants, and part of pigments in water, but also soften the water quality and make the water quality weakly acidic suitable for the constitution of cats, thereby providing clean, low-mineral, and safe drinking water for cats.

[0022] In some embodiments, the H + :OH - in the mixed bed resin is 1: (1-3). In specific applications, the H + :OH - may be 1:1, or 1:1.5, or 1:2, or 1:2.5, or 1:3, etc.

[0023] In some embodiments, the activated carbon filter material is activated carbon fiber felt and / or activated carbon particles.

[0024] In some embodiments, the activated carbon filter material is activated carbon fiber felt, and the iodine value of the activated carbon fiber felt is 800 mg / g-2000 mg / g. Preferably, the iodine value of the activated carbon fiber felt is 1500 mg / g-2000 mg / g. The activated carbon filter material can effectively adsorb small molecular organic matter, impurities, etc.

[0025] In some embodiments, the activated carbon filter material includes at least one of coconut shell activated carbon, coal-based activated carbon, and nut shell activated carbon. In this embodiment, the activated carbon filter material is coconut shell activated carbon.

[0026] In some embodiments, the activated carbon filter material is activated carbon fiber felt, and the thickness of the activated carbon filter material to the weight of the ion exchange resin filter material is (3 mm-10 mm):(60 g-120 g). In this way, the use of filter material can be effectively saved on the basis of meeting the requirements for water quality. When the ratio is too large, the activated carbon filter material is used too much, causing waste of the activated carbon filter material, and the use of too much activated carbon filter material has a greater impact on flow rate, limiting the water outlet speed and possibly causing uneven water outlet and intermittent water flow. When the ratio is too small, the ion exchange resin filter material is used too much, causing waste of the ion exchange resin filter material, and possibly incomplete removal of pollutants and reduced adsorption performance.

[0027] In specific applications, the activated carbon fiber felt can be provided in at least two pieces, such as two, three, four, etc. The thickness of the activated carbon filter material to the weight of the ion exchange resin filter material can be (3 mm-10 mm):60 g, or (3 mm-10 mm):70 g, or (3 mm-10 mm):80 g, or (3 mm-10 mm):90 g, or (3 mm-10 mm):100 g, or (3 mm-10 mm):110 g, or (3 mm-10 mm):120 g.

[0028] In some embodiments, the thickness of each piece of activated carbon fiber felt is 2 mm-4 mm. If the thickness of each piece of activated carbon fiber felt is too thick, it will generate greater resistance to the flow of water and its internal filtration efficiency will also be affected. By setting the thickness of each piece of activated carbon fiber felt to be 2 mm-4 mm, the water can flow smoothly while ensuring the filtration effect on the water.

[0029] In some embodiments, the thickness of the activated carbon filter material to the weight of the ion exchange resin filter material is (5 mm-8 mm):(80 g-100 g). In specific applications, the thickness of the activated carbon filter material to the weight of the ion exchange resin filter material can be (5 mm-8 mm):80 g, or (5 mm-8 mm):90 g, or (5 mm-8 mm):100 g.

[0030] In some embodiments, the thickness of the activated carbon filter material to the weight of the ion exchange resin filter material is 6mm:(80g-90g). In specific applications, the thickness of the activated carbon filter material to the weight of the ion exchange resin filter material can be 6mm:80g, or 6mm:85g, or 6mm:90g.

[0031] In some embodiments, the activated carbon filter material is activated carbon particles, and the weight ratio of the activated carbon filter material to the ion exchange resin filter material is (5-30):(60-120). In this way, on the basis of meeting the requirements of water quality, the use of filter material can be effectively saved. When the ratio is too large, the activated carbon filter material is used too much, causing waste of activated carbon filter material, and the use of activated carbon filter material is too much, which has a greater impact on flow rate, and the outflow rate is limited, which may lead to uneven outflow and intermittent water flow; when the ratio is too small, the ion exchange resin filter material is used too much, causing waste of ion exchange resin filter material, and may not completely remove pollutants, reduce adsorption performance, etc.

[0032] In specific applications, the weight ratio of the activated carbon filter material to the ion exchange resin filter material can be (5-30):60, or (5-30):70, or (5-30):80, or (5-30):90, or (5-30):100, or (5-30):110, or (5-30):120, etc.

[0033] In some embodiments, the weight ratio of the activated carbon filter material to the ion exchange resin filter material is (10-20):(80-100). In specific applications, the weight ratio of the activated carbon filter material to the ion exchange resin filter material can be (10-20):80, or (10-20):90, or (10-20):100, etc.

[0034] In some embodiments, the weight ratio of the activated carbon filter material to the ion exchange resin filter material is 15:(80-90). In specific applications, the weight ratio of the activated carbon filter material to the ion exchange resin filter material can be 15:80, or 15:85, or 15:90, etc.

[0035] In some embodiments, the ion exchange resin filter material is composed of H-type resin and Na-type resin or the ion exchange resin filter material includes a mixed bed resin.

[0036] In some embodiments, the ion exchange resin filter media comprises the following components in parts by weight: 5-10 parts of H-type resin and 60-80 parts of Na-type resin. This configuration provides water that meets the nutritional requirements of cats. When the H-type resin content is too high, the water becomes overly acidic; when the pH is < 5.0, it can easily cause metabolic acidosis in cats, making overly acidic water unsuitable for cats. Similarly, when the Na-type resin content is too high, the water becomes too neutral or alkaline, also unsuitable for cats. Preferably, the ion exchange resin filter media comprises the following components in parts by weight: 8 parts of H-type resin and 75 parts of Na-type resin.

[0037] In some embodiments, the ion exchange resin filter media includes mixed bed resin and H-type resin.

[0038] In some embodiments, the ion exchange resin filter media, by weight, comprises: 60-90 parts of mixed-bed resin and 0-20 parts of H-type resin. This configuration provides water that meets the nutritional requirements of cats. However, excessively high H-type resin content can make the water too acidic. When the pH is < 5.0, it can easily cause metabolic acidosis in cats; therefore, excessively acidic water is unsuitable for cats to drink.

[0039] In some embodiments, the ion exchange resin filter media is a mixed-bed resin. Using a mixed-bed ion exchange resin filter media, i.e., employing a single resin as the ion exchange resin filter media, allows water to flow more evenly through the ion exchange resin filter media, reducing cross-contamination. Specifically, when the activated carbon filter media is activated carbon fiber felt, the weight ratio of the activated carbon fiber felt thickness to the mixed-bed resin is (3mm–10mm):(60g–120g). Preferably, the weight ratio of the activated carbon fiber felt thickness to the mixed-bed resin is 6mm:(80g–90g). When the activated carbon filter media is activated carbon granules, the weight ratio of the activated carbon granules to the mixed-bed resin is (5–30):(60–120). Preferably, the weight ratio of the activated carbon granules to the mixed-bed resin is 15:(80–90).

[0040] In some embodiments, the ion exchange resin filter media comprises the following components in parts by weight: 70-80 parts of mixed bed resin and 10-20 parts of H-type resin. Preferably, the ion exchange resin filter media comprises the following components in parts by weight: 75 parts of mixed bed resin and 15 parts of H-type resin.

[0041] In some embodiments, the ion exchange resin filter media comprises the following components in parts by weight: mixed bed resin (60-70 parts), H-type resin (10-20 parts), and Mg-type resin (10-20 parts). The Mg-type resin is a cation exchange resin capable of removing Ca²⁺ from water. + It can also replenish Mg² in water bodies, including heavy metals. +Preferably, the ion exchange resin filter material is composed of the following components by weight: 60 parts of mixed bed resin, 10 parts of H type resin, and 20 parts of Mg type resin.

[0042] In some embodiments, the ratio of the maximum filtered water volume of the composite filter core material to the weight of the ion exchange resin filter material is (9L-20L):(60g-120g), and the flow rate of the water flowing through the ion exchange resin filter material is 5min / L-18min / L; preferably, the ratio of the maximum filtered water volume of the composite filter core material to the weight of the ion exchange resin filter material is (9L-16L):(80g-100g).

[0043] The maximum filtered water volume of the composite filter core material is the service life of the composite filter core material, that is, when the filtered water volume is greater than the maximum filtered water volume of the composite filter core material, the generated filtered water no longer meets the water quality requirements.

[0044] If the flow rate of the water flowing through the ion exchange resin filter material is too fast, the filtering effect of the filter material on the water body is not good, and the generated filtered water may not meet the requirements; if the flow rate is too slow, the speed of generating filtered water is slow, which affects the user experience. By setting the flow rate of the water flowing through the ion exchange resin filter material to be 5min / L-18min / L, filtered water that meets the requirements can be generated, and the speed of generating filtered water will not be too slow.

[0045] In some embodiments, the maximum filtered water volume of the composite filter core material is 9L-20L, the weight of the ion exchange resin filter material is 60g-120g, and the flow rate of the water flowing through the ion exchange resin filter material is 5min / L-18min / L; preferably, the maximum filtered water volume of the composite filter core material is 9L-16L, the weight of the ion exchange resin filter material is 80g-100g. In this way, a sufficient amount of water that meets the requirements can be obtained by using a small amount of ion exchange resin filter material, thereby saving costs.

[0046] In some embodiments, when the driving force for driving the water flow is in the range of 0.02bar-0.05bar, the amount of ion exchange resin filter material satisfies the following formula: wherein W represents the amount of ion exchange resin filter material (ml), V represents the daily water consumption of the pet (ml / day), D represents the number of days of drinking water, K-water represents the tap water quality coefficient, E-pet represents the effective exchange capacity of the ion exchange resin filter material, and η-gravity represents the gravity efficiency coefficient.

[0047] When the water body flows through the composite filter material by gravity, the driving force for driving the water body to flow is the gravity driving force. For different regions, the tap water quality coefficient is different. The tap water quality coefficient in soft water area (such as southern China) is 0.8, the tap water quality coefficient in medium hardness area (such as eastern China) is 1.0, the tap water quality coefficient in hard water area (such as northern and northwestern China) is 1.3, and the tap water quality coefficient in high chlorine / heavy metal area is 1.5. The effective exchange capacity of the strong acid cation exchange resin is 1.8 eq / L-2.2 eq / L, and the effective exchange capacity of the weak acid cation exchange resin is 2.0 eq / L-3.5 eq / L. The gravity efficiency coefficient is 0.3-0.6.

[0048] According to the second aspect of the present application, a filter core for a pet water drinking device is provided in some embodiments, comprising a shell with a water inlet and a water outlet, and the composite filter material of the first aspect, the composite filter material is arranged in the shell, the activated carbon filter material is arranged close to the water inlet, and the ion exchange resin filter material is arranged close to the water outlet.

[0049] It should be noted that by using the above-mentioned composite filter material, the filter core can effectively remove harmful substances such as residual chlorine, odors, organic pollutants, and part of pigments in water, and also soften the water quality, so that the water quality is weakly acidic and suitable for cat body, and provides clean, low-mineral, and safe drinking water for cats.

[0050] According to the third aspect of the present application, a pet water drinking device is provided in some embodiments, comprising the composite filter material of the first aspect or the filter core of the second aspect. In this way, the pet water drinking device can provide clean, low-mineral, and safe drinking water for cats. In some embodiments, the pet water drinking device further comprises a water cup body and a raw water bearing container, the filter core is arranged between the water cup body and the raw water bearing container, the water cup body has a first accommodating cavity, the raw water bearing container has a second accommodating cavity, the filter core communicates the first accommodating cavity and the second accommodating cavity, and the volume of the second accommodating cavity is less than or equal to the volume of the first accommodating cavity.

[0051] By setting the water cup body, the filter core communicates the first accommodating cavity of the water cup body, and the water body formed after filtering through the filter core can flow into the first accommodating cavity and be stored in the first accommodating cavity, so as to be taken at any time. By setting the raw water bearing container, the filter core is in communication with the second accommodating cavity of the raw water bearing container, and the raw water (tap water / wild water) can be placed in the second accommodating cavity and then flow into the filter core for filtering. In specific applications, when there is no pure water or the amount of pure water in the first accommodating cavity of the water cup body is small, raw water can be injected into the raw water bearing container and then filtered through the filter core to supplement the pure water in the first accommodating cavity of the water cup body. Among them, raw water can be injected into the raw water bearing container according to the amount of water in the first accommodating cavity at any time, so as to ensure that there is enough pure water in the first accommodating cavity, and the possibility of continuously providing clean and safe drinking water for pets can be realized.

[0052] In addition, in the pet water drinking device, the water body flows through the filter core by gravity, and a pump body can not be provided, which is beneficial to reduce the overall weight of the product. Of course, in other embodiments, the pet water drinking device can also include a pump body.

[0053] In some embodiments, the pet is a cat. That is, the pet water drinking device is used to provide drinking water for cats.

[0054] The present application will be further described in detail through specific embodiments. The following embodiments are only further descriptions of the present application and should not be understood as limitations of the present application. It should be noted that, unless otherwise specified, the reagents, instruments and the like used in the embodiments are all commercially available.

[0055] Example 1: In this embodiment, the composite filter core material for the pet water drinking device includes two pieces of activated carbon fiber felt, 80g of mixed bed resin and 20g of H type resin. Among them, the thickness of each piece of activated carbon fiber felt is 3mm, the ratio of H + :OH - is 1:2.

[0056] Water quality test: The composite filter element material provided in the embodiment is used to prepare a filter element to filter mixed water of raw water and spiked water (volume ratio of raw water to spiked water is 1:1), and the filtered water is detected for hardness alkalinity, pH, TDS, element content and residual chlorine. The raw water refers to tap water, and the spiked water refers to test water artificially prepared and containing specific concentration of pollutants, which is usually a composite solution containing multiple pollutants. The main standards followed are industry standards, for example, the standards of QB / T 4143-2019 and QB / T 4144-2019 clearly propose “spiking throughout the process”. In order to comprehensively test the composite filter element material, the present application uses spiked water and raw water mixed water to verify the filtration performance, removal effect and filter material life of the composite filter element material provided in the present application under simulated extreme water quality conditions.

[0057] Hardness alkalinity detection: EDTA titration method is used for hardness alkalinity detection, and the reference standard is GB / T 7477-1987 “Determination of Total Calcium and Magnesium in Water EDTA Titration Method”; pH detection: pH indicator is used for detection, and the equipment name is pH / mV meter (model: SX711 type); TDS detection: TDS pen is used for detection; Element content detection: atomic absorption spectrophotometer WFX-200 is used for detection; Residual chlorine detection: residual chlorine colorimeter (model: Hash DR900 portable) is used for detection.

[0058] The detection results are shown in Table 1.

[0059] Table 1 Among them, “ / ” represents undetected. The raw water: spiked water in the water production index column represents the water body to be filtered, and 1L, 2L, 3L, etc. represent the water volume generated after being filtered by the composite filter element material. The same below.

[0060] Example 2: In this embodiment, the composite filter element material for pet drinking water device includes two pieces of activated carbon fiber felt, 75g mixed bed resin and 15g H type resin.

[0061] Among them, the number and thickness of the activated carbon fiber felt, the mixed bed resin and the detection method are the same as those in Example 1. The detection results are shown in Table 2.

[0062] Table 2 Example 3: In this embodiment, the composite filter material for pet water drinking device comprises two pieces of activated carbon fiber felt, 75g mixed bed resin and 12g H-type resin.

[0063] Except for using tap water for detection, the number and thickness of activated carbon fiber felt, mixed bed resin and detection method are the same as those in Example 1. The detection results are shown in Table 3.

[0064] Table 3 Example 4: In this embodiment, the composite filter material for pet water drinking device comprises two pieces of activated carbon fiber felt, 75g mixed bed resin and 10g H-type resin.

[0065] The number and thickness of activated carbon fiber felt, mixed bed resin and detection method are the same as those in Example 1. The detection results are shown in Table 4.

[0066] Table 4 Example 5: In this embodiment, the composite filter material for pet water drinking device comprises two pieces of activated carbon fiber felt, 60g mixed bed resin, 10g H-type resin and 20g Mg-type resin.

[0067] The number and thickness of activated carbon fiber felt, mixed bed resin and detection method are the same as those in Example 1. The detection results are shown in Table 5.

[0068] Table 5 Example 6: In this embodiment, the composite filter material for pet water drinking device comprises two pieces of activated carbon fiber felt and 85g mixed bed resin.

[0069] Except for using tap water for detection, the number and thickness of activated carbon fiber felt, mixed bed resin and detection method are the same as those in Example 1. The detection results are shown in Table 6.

[0070] Table 6 Example 7: In this embodiment, the composite filter material for pet water drinking device comprises two pieces of activated carbon fiber felt, 8g H-type resin and 75g Na-type resin.

[0071] The number and thickness of activated carbon fiber felt and detection method are the same as those in Example 1. In addition, this embodiment is subjected to repetitive detection, and the detection results are shown in Tables 7 and 8.

[0072] Table 7 Table 8 Comparative Example 1: In this embodiment, the composite filter material for the pet water drinking device comprises two pieces of activated carbon fiber felt.

[0073] The number and thickness of the activated carbon fiber felt and the detection method are the same as those in Example 1. The detection results are shown in Table 9.

[0074] Table 9 Comparative Example 2: In this embodiment, the composite filter material for the pet water drinking device comprises two pieces of activated carbon fiber felt and 60g of Na type resin.

[0075] The number and thickness of the activated carbon fiber felt and the detection method are the same as those in Example 1. The detection results are shown in Table 10.

[0076] Table 10 Comparative Example 3: In this embodiment, the composite filter material for the pet water drinking device comprises two pieces of activated carbon fiber felt, 75g of mixed bed resin and 40g of H type resin.

[0077] The number and thickness of the activated carbon fiber felt, the mixed bed resin and the detection method are the same as those in Example 1. The detection results are shown in Table 11.

[0078] Table 11 Result analysis: Compared with Comparative Example 1, the water softening effect of Examples 1-7 is obviously better, and the water hardness is basically 0. Compared with Comparative Examples 2 and 3, the pH value of the water obtained by Examples 1-7 meets the physical requirements of cats, and is weakly acidic. From the water quality detection results of Examples 1-7, it can be seen that the total weight of the ion exchange resin filter material is not more than 100g, and at least 9L of water meeting the requirements can be produced, the hardness of the water is basically 0, there is no sour taste, and the residual chlorine removal rate is high, reaching more than 90%. In addition, from the repeatability test of Example 7, it can be seen that the stability of the composite filter material is good, and the water quality after filtration meets the requirements. Therefore, the composite filter material provided by the present application can provide clean, low mineral, safe drinking water for cats.

[0079] The above application of specific examples to illustrate the present invention, is only used to help understand the present invention, and does not limit the present invention. For the skilled in the art to which the present invention belongs, according to the idea of the present invention, several simple deductions, deformation or replacement can be made.

Claims

1. A composite filter material for pet drinking devices, characterized in that, It includes activated carbon filter media and ion exchange resin filter media, wherein the activated carbon filter media is disposed upstream of the ion exchange resin filter media, and the ion exchange resin filter media includes mixed bed resin and / or H-type resin.

2. The composite filter material as described in claim 1, characterized in that, The activated carbon filter material is activated carbon fiber felt and / or activated carbon particles; Alternatively, the activated carbon filter material may include at least one of coconut shell activated carbon, coal-based activated carbon, and fruit shell activated carbon.

3. The composite filter material as described in claim 1, characterized in that, The activated carbon filter material is activated carbon fiber felt, and the weight ratio of the thickness of the activated carbon filter material to the ion exchange resin filter material is (3mm~10mm):(60g~120g); preferably, the weight ratio of the thickness of the activated carbon filter material to the ion exchange resin filter material is (5mm~8mm):(80g~100g). Alternatively, the activated carbon filter media is activated carbon granules, and the weight ratio of the activated carbon filter media to the ion exchange resin filter media is (5-30):(60-120); preferably, the weight ratio of the activated carbon filter media to the ion exchange resin filter media is (10-20):(80-100).

4. The composite filter material as described in claim 1, characterized in that, The ion exchange resin filter media is composed of the following components in parts by weight: H-type resin (5-10 parts) and Na-type resin (60-80 parts); Alternatively, by weight, the ion exchange resin filter media comprises: 60-90 parts of mixed bed resin and 0-20 parts of H-type resin.

5. The composite filter material as described in claim 4, characterized in that, The ion exchange resin filter media is a mixed bed resin; Alternatively, the ion exchange resin filter media is composed of the following components in parts by weight: mixed bed resin (70-80 parts) and H-type resin (10-20 parts); Alternatively, the ion exchange resin filter media may be composed of the following components in parts by weight: 60-70 parts of mixed bed resin, 10-20 parts of H-type resin, and 10-20 parts of Mg-type resin.

6. The composite filter material as described in claim 1, characterized in that, The maximum filtration capacity of the composite filter material to the weight ratio of the ion exchange resin filter media is (9L~20L):(60g~120g), and the flow rate of water through the ion exchange resin filter media is 5min / L~18min / L; preferably, the maximum filtration capacity of the composite filter material to the weight ratio of the ion exchange resin filter media is (9L~16L):(80g~100g). Alternatively, the maximum filtration capacity of the composite filter material is 9L to 20L, the weight of the ion exchange resin filter media is 60g to 120g, and the flow rate of water through the ion exchange resin filter media is 5min / L to 18min / L; preferably, the weight of the ion exchange resin filter media is 80g to 100g.

7. The composite filter material as described in claim 1, characterized in that, When the driving force for water flow is in the range of 0.02 bar to 0.05 bar, the amount of ion exchange resin filter media used satisfies the following formula: Wherein, W represents the amount of ion exchange resin filter media used, V represents the pet's daily water intake, D represents the number of days the pet drinks water, K-water represents the tap water quality coefficient, E-pet represents the effective exchange capacity of the ion exchange resin filter media, and η-gravity represents the gravity efficiency coefficient.

8. A filter cartridge for a pet drinking device, characterized in that, The device includes a housing having an inlet and an outlet, and a composite filter material as described in any one of claims 1 to 7, wherein the composite filter material is disposed within the housing, the activated carbon filter media is disposed near the inlet, and the ion exchange resin filter media is disposed near the outlet.

9. A pet drinking device, characterized in that, Includes the composite filter material as described in any one of claims 1 to 7 or the filter element as described in claim 8.

10. The pet drinking device as described in claim 9, characterized in that, The pet drinking device also includes a water cup body and a raw water container. The filter element is disposed between the water cup body and the raw water container. The water cup body has a first accommodating cavity, and the raw water container has a second accommodating cavity. The filter element connects the first accommodating cavity and the second accommodating cavity. The volume of the second accommodating cavity is less than or equal to the volume of the first accommodating cavity. And / or, the pet is a cat.

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