Heat recovery coil pipe condensate water filtering device with backwashing function

Abstract

The utility model discloses a heat recovery coil pipe condensate water filtering device with a backwashing function, and relates to the technical field of heat recovery of a fresh air system. The filtering device comprises a temporary storage tank and a liquid level detector arranged in the temporary storage tank, and further comprises a filtering tank, a filter element is arranged in the filtering tank, the bottom of the temporary storage tank is connected with the water inlet end of the filtering tank through a water inlet pipe, the filtering device further comprises a water storage tank, and the water outlet end of the filtering tank is connected with the water storage tank through a backwashing pipe and a water outlet pipe. A booster pump is arranged on the backwashing pipe; a first electromagnetic valve is arranged on the water inlet pipe, a second electromagnetic valve is arranged on the water outlet pipe, a third electromagnetic valve is arranged on the backwashing pipe and is positioned between the filter box and the booster pump, a blow-off pipe is arranged on the water inlet pipe and is positioned between the first electromagnetic valve and the filter box, and a fourth electromagnetic valve is arranged on the blow-off pipe; the auxiliary condensed water filtering acceleration function is started only under the condition that the condensed water generation amount is large, and electricity consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fresh air system heat recovery technical field, concretely is a kind of heat recovery coil condensate filtering device with backwashing function. BACKGROUND

[0002] The heat recovery in fresh air system is a kind of heat recovery form between fresh air unit and exhaust unit, utilizes the temperature difference between outdoor fresh air and indoor exhaust, and heat exchange medium is circulated between fresh air heat exchanger and exhaust heat exchanger by circulating pump drive, to realize exhaust energy recovery to reach the purpose of energy saving and consumption reduction.

[0003] When heat recovery coil in fresh air air-conditioning box is heat exchanged with fresh air, a large amount of low-temperature condensate is generated due to the sudden drop of air temperature around the heat recovery coil, so auxiliary device is needed to filter and collect the condensate to prevent the condensate from being discharged to the outside and causing environmental impact, and the collected condensate can be centrally treated and applied to other water needs.

[0004] Since the generation of condensate is affected by air humidity, temperature and season, the generation of condensate is unstable, and when the generation speed of condensate is fast, booster device is needed to assist in accelerating filtration, otherwise the condensate will overflow; when the amount of condensate generated is small, the condensate will always be filtered by the booster, which will cause high power consumption of the booster and increase the use cost. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a heat recovery coil condensate filtering device with backwashing function, by setting the liquid level detector, the auxiliary accelerated condensate filtration function is only started in the case of large amount of condensate generation, which not only ensures that the condensate will not overflow due to excessive generation, but also saves electricity in the case of small amount of condensate generation.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a heat recovery coil condensate filtering device with backwashing function, comprising a temporary storage tank and a liquid level detector arranged in the temporary storage tank, further comprising a filter tank, a filter core is arranged in the filter tank, the bottom of the temporary storage tank is connected with the water inlet end of the filter tank through a water inlet pipe, further comprising a water storage tank, the water outlet end of the filter tank is connected with the water storage tank through a backwashing pipe and a water outlet pipe, and a booster pump is arranged on the backwashing pipe;

[0007] A first electromagnetic valve is arranged on the water inlet pipe, a second electromagnetic valve is arranged on the water outlet pipe, a third electromagnetic valve is arranged on the backwashing pipe between the filter tank and the booster pump, a blowdown pipe is arranged on the water inlet pipe between the first electromagnetic valve and the filter tank, and a fourth electromagnetic valve is arranged on the blowdown pipe.

[0008] Preferably, the booster pump adopts a positive and negative rotation booster pump.

[0009] Preferably, the booster pump adopts a one-way booster pump and is connected with the backwashing pipe in cooperation with a four-way reversing valve.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] 1、The utility model discloses, through the setting of liquid level detector, make the auxiliary acceleration condensate filtration function only start under the condition that the condensate production is relatively large, guarantee that the condensate does not cause the condensate overflow due to the production excessive condition, and ensure that under the condition that the condensate production is relatively small, the electricity is saved.

[0012] 2、The utility model discloses, through the reverse drive of booster pump, can introduce the filter core to the filter core and carry out backwashing after the condensate of filtering good is boosted reversely, and the condensate after backwashing carries the impurity washed away and exports to the outside world in proper order through the water inlet pipe and blowdown pipe, ensure that the filter core maintains good filtration effect. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 For the structure diagram of the utility model Figure 1 (Natural filtration condition);

[0014] Figure 2 For the structure diagram of the utility model Figure 2 (Auxiliary booster filtration condition);

[0015] Figure 3 For the structure diagram of the utility model Figure 3 (Backwashing condition).

[0016] In the drawing:

[0017] 1-temporarily stores the box, 2-liquid level detector, 3-stores the water tank, 4-filter box, 5-filter core, 6-boosts the pump, 71-water inlet pipe, 72-water outlet pipe, 73-backwashing pipe, 74-blowdown pipe, 81-first electromagnetic valve, 82-second electromagnetic valve, 83-third electromagnetic valve, 84-fourth electromagnetic valve. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0019] For example, Figures 1 to 3As shown, a heat recovery coil condensate water filtering device with backwashing function comprises a temporary storage tank 1 and a liquid level detector 2 arranged inside the temporary storage tank 1, a filtering tank 4, a filter element 5 arranged inside the filtering tank 4, a water inlet pipe 71 connecting the bottom of the temporary storage tank 1 with a water inlet end of the filtering tank 4, a water storage tank 3, and a backwashing pipe 73 and a water outlet pipe 72 connecting the water outlet end of the filtering tank 4 with the water storage tank 3.

[0020] A first electromagnetic valve 81 is arranged on the water inlet pipe 71, a second electromagnetic valve 82 is arranged on the water outlet pipe 72, and a third electromagnetic valve 83 is arranged on the backwashing pipe 73 between the filtering tank 4 and the booster pump 6. A blowdown pipe 74 is arranged on the water inlet pipe 71 between the first electromagnetic valve 81 and the filtering tank 4, and a fourth electromagnetic valve 84 is arranged on the blowdown pipe 74.

[0021] In use, the top of the temporary storage tank 1 is open, and the temporary storage tank 1 is arranged directly below the heat recovery coil, so that the condensate water generated by the heat recovery coil directly drips into the temporary storage tank 1 for filtering.

[0022] Working principle:

[0023] 1. Natural condensate water filtering condition (e.g. Figure 1 ): The first electromagnetic valve 81 and the second electromagnetic valve 82 are opened, and the third electromagnetic valve 83 and the fourth electromagnetic valve 84 are closed. The condensate water flowing into the temporary storage tank 1 enters the filter element 5 through the water inlet pipe 71 for filtering, and the filtered condensate water enters the filtering tank 4, and then the condensate water enters the water storage tank 3 through the water outlet pipe 72, completing the natural flushing process.

[0024] 2. Auxiliary accelerated condensate water filtering condition (e.g. Figure 2 ): The condensate water is generated too fast, causing a large amount of condensate water to accumulate in the temporary storage tank 1. When the condensate water is about to overflow the temporary storage tank 1, the liquid level detector 2 detects the position at which the condensate water is about to overflow, so that the first electromagnetic valve 81, the second electromagnetic valve 82, and the third electromagnetic valve 83 are opened, the booster pump 6 is opened, and the fourth electromagnetic valve 84 is closed. The condensate water in the temporary storage tank 1 enters the temporary storage tank 1 through the water inlet pipe 71 and the filter element 5, part of the filtered condensate water enters the water storage tank 3 through the water outlet pipe 72, and the other part of the condensate water enters the water storage tank 3 through the backwashing pipe 73 under the boosting action of the booster pump 6. The draining action of the booster pump 6 causes a negative pressure to be formed in the filtering tank 4, which increases the water flow rate between the temporary storage tank 1 and the filtering tank 4 and accelerates the filtering efficiency under the action of the negative pressure.

[0025] 3. Backwashing condition for the filter element 5 (e.g. Figure 3) : the first electromagnetic valve 81 and the second electromagnetic valve 82 are closed, and the third electromagnetic valve 83 and the fourth electromagnetic valve 84 are opened. The booster pump 6 is reversely operated, and the condensed water stored in the storage tank 3 is introduced into the filter tank 4 through the backwashing pipe 73 after being boosted, and the filter element 5 is backwashed, and the backwashed condensed water is discharged to the outside through the water inlet pipe 71 and the blowdown pipe 74 in turn after carrying the washed impurities.

[0026] Preferably, in the embodiment, the filter tank 4 is arranged below the temporary storage tank 1, so that the condensed water can flow into the filter tank 4 by the kinetic energy provided by the natural gravity in the working condition of non-assisted filtration, and the storage tank 3 is arranged below the filter tank 4, and the same purpose is to make the filtered condensed water enter the storage tank 3 by the gravity.

[0027] The above-mentioned natural condensed water filtration working condition has the advantage of providing kinetic energy by the natural gravity, which can save electricity, but the filtration efficiency is low. The above-mentioned auxiliary accelerated condensed water filtration working condition has the advantage of increasing the filtration efficiency by the booster pump 6, but needs to increase the power consumption, and the power consumption is particularly obvious in the case of less condensed water. Therefore, through the arrangement of the liquid level detector 2, the auxiliary accelerated condensed water filtration function is only started in the case of more condensed water, which can not only ensure that the condensed water will not overflow due to excessive generation, but also ensure that the power consumption is saved in the case of less condensed water.

[0028] Of course, the embodiment also includes a control device for controlling the liquid level detector 2, the booster pump 6, the first electromagnetic valve 81, the second electromagnetic valve 82, the third electromagnetic valve 83 and the fourth electromagnetic valve 84, such as an industrial computer, a PLC controller and the like. The above-mentioned control device is a conventional technology, and the specific arrangement mode will not be described in detail here.

[0029] In the embodiment, the booster pump 6 can adopt a forward and reverse rotation booster pump, or can adopt a one-way booster pump cooperating with a four-way reversing valve and being connected with the backwashing pipe 73, so as to realize the forward and reverse flow direction of the water flow in the backwashing pipe 73. The above-mentioned forward and reverse rotation booster pump and the four-way reversing valve are also prior art, and the specific arrangement mode will not be described in detail.

[0030] It is obvious for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A heat recovery coil condensate filter device with backwash function, characterized by: The utility model relates to a water purifying device, including temporary storage tank and the liquid level detector of setting in the inside of temporary storage tank, still including filter tank, the filter core is arranged in the inside of filter tank, the bottom of temporary storage tank is connected with the water inlet end of filter tank through water inlet pipe, still including water storage tank, the water outlet end of filter tank is connected with water storage tank through back flushing pipe and water outlet pipe respectively, the booster pump is set up on back flushing pipe, The first electromagnetic valve is set up on water inlet pipe, the second electromagnetic valve is set up on water outlet pipe, the third electromagnetic valve is set up on back flushing pipe and is located between filter tank and booster pump, the blowdown pipe is set up on water inlet pipe and is located between first electromagnetic valve and filter tank, the fourth electromagnetic valve is set up on blowdown pipe.

2. The condensate filter device with backwashing function according to claim 1, characterized in that: The booster pump adopts positive and negative rotation booster pump.

3. The condensate filter device with backwashing function according to claim 1, characterized in that: The booster pump adopts one-way booster pump and is connected with back flushing pipe through four-way reversing valve.

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