KR101067449B1

KR101067449B1 - Heat pump system enabling in scale removal

Info

Publication number: KR101067449B1
Application number: KR1020090052349A
Authority: KR
Inventors: 강한기
Original assignee: 강한기
Priority date: 2009-06-12
Filing date: 2009-06-12
Publication date: 2011-09-27
Also published as: KR20100133669A

Abstract

The present invention relates to a heat pump system capable of descaling, in particular a hot water destination using hot water; A filtration unit for filtering particulate solid sludge from the wastewater discharged from the hot water use destination; A wastewater tank in which wastewater passing through the filtration unit is stored for a predetermined time; A heat recovery pipe for circulating water into the waste water tank; A heat storage tank for accumulating heat sources recovered through the heat recovery pipes; A heat pump configured to perform cooling, heating, and hot water using a heat source accumulated in the heat storage tank; A hot water tank in which hot water heat exchanged by the heat pump is stored; An air supply pipe for supplying air in the form of a bubble from the bottom of the waste water tank; A heat pump system comprising: scale detection means for detecting the scale of the surface of the heat recovery pipe is installed on the surface of the heat recovery pipe; A blowing fan for supplying air to the air supply pipe by changing a rotation speed according to an external control; And detecting the pollution degree according to the scale generated on the surface of the heat recovery pipe through the scale detection means, and controlling the rotation speed and the rotation time of the blowing fan according to the pollution degree by using the air bubble supplied through the air supply pipe. It further comprises a controller for removing the scale generated on the surface of the heat recovery tube.

According to the present invention as described above, by detecting the pollution degree according to the scale generated on the surface of the heat recovery pipe, and set the pressure and time according to the pollution degree and generates bubbles accordingly, the system is operated only when the scale is generated, the system with a relatively small operating cost If the temperature difference occurs by checking the temperature of outside air and waste water, it is heated by using a heater when the outside air is drawn in, and then supplied by the air to prevent the waste water temperature in the waste water tank from being lowered by air bubbles. It can be supplied at a higher temperature to increase the thermal efficiency.

Heat Pump, Waste Heat, Waste Water Heat, Heat Recovery Pipe, Scale, Removal, Bubble

Description

Descaling Heat Pump System {HEAT PUMP SYSTEM ENABLING IN SCALE REMOVAL}

The present invention relates to a heat pump system, and in detail, detects the amount of scale generated on the surface of the heat recovery tube, and if the scale occurs above the reference value, sets pressure and time according to the amount of scale, and generates bubbles accordingly. The present invention relates to a heat pump system capable of removing a scale to check a temperature of an outside air and waste water, and to supply it after heating by using a heater when a temperature difference occurs.

In general, a heat pump system is an air conditioner that enables cooling and heating to be selectively performed while a compressor, a heat exchanger, an expansion valve, and an evaporator form a circulation cycle, and selects the cooling mode or the heating mode. As a result, it is well known that the cooling of the refrigerant is performed in the opposite direction to each other and cooling or heating is performed according to the selected mode.

As such, the conventional heat pump absorbs the outside air and heats the supply water of the low temperature bath, and the thermal efficiency is greatly changed due to the temperature variation that changes according to the season.

Meanwhile, some types of heat pump systems have been proposed to regenerate a large amount of wastewater heat discharged from a public bath or an industry for use in cooling, heating, and hot water supply. However, various kinds of foreign substances contained in the wastewater may be used. The circulating heat recovery tube has a problem in that heat exchange efficiency is reduced because a large amount of scale and an oil film are adsorbed and formed.

In order to solve this problem, Korean Utility Model Publication No. 20-0419356 (Heat Pump System using Wastewater Heat Source, Registration Date June 13, 2006) has been filed.

As shown in FIG. 1, the heat pump system using the wastewater heat source includes a filtration unit 20 for filtering particulate solid sludge from the wastewater discharged from the hot water using place 10 using hot water, such as a public bath, a bathtub, a washbasin, and the like. The wastewater tank 30 through which the wastewater passed through the filtration unit 20 is stored for a predetermined time, a heat recovery pipe 40 for circulating water into the wastewater tank 30, and a heat recovery pipe 40. The heat storage tank 50 in which the heat source is accumulated, the heat pump 60 utilizing the heat source accumulated in the heat storage tank 50 to drive the evaporator (not shown), and the air from the waste water tank 30. It was composed of an air supply pipe 80 for supplying in the form of bubbles.

In particular, the wastewater tank 30 is partitioned into a plurality of spaces (S1, S2, S3) by the partition wall 31, the through-hole 32 is different from each other to allow the flow of wastewater in each partition wall (31). Was formed, and one side was connected to the drain pipe 33 for draining the waste water after heat exchange.

In addition, one end of the air supply pipe 80 is equipped with a blowing fan 81 for supplying air, and a plurality of nozzles 82 are formed at regular intervals so that bubbles can be discharged along the air supply pipe 80. have.

In the figure, reference numeral 70 denotes a hot water tank connected to the condenser side of the heat pump 60 by a refrigerant pipe for heat exchange.

In the heat pump system using the wastewater heat source, when the wastewater is discharged from the hot water use place 10 where a large amount of hot water is used, such as a shower stall, the discharged wastewater is filtered in the process of passing through the filtration unit 20.

Then, the waste water is filtered is supplied to the waste water tank 30 and stored in each of the space (S1, S2, S3) partitioned by the partition 31, the water stored in the heat storage tank 50 The heat source of the wastewater is received in the process of circulating in the wastewater tank 30 through the heat recovery pipe 40 installed to circulate each space (S1, S2, S3).

In particular, a temperature difference slightly occurs between the wastewater stored in each of the spaces S1, S2, and S3 in the wastewater tank 30 (S1> S2> S3). Since it is recovered to the heat storage tank 50 after finally passing through the supplied space (S1) it is possible to minimize the heat loss.

That is, the heat recovery tube 40 is heated in three steps in the process of sequentially passing through the space of S2 and S1 starting from S3 to obtain a waste heat source of high temperature.

On the other hand, convection of the wastewater stored in the wastewater tank 30 can be naturally generated to maintain an even heat balance overall, and to minimize the decrease in heat exchange efficiency due to scale (water) contamination generated in the heat recovery pipe 40. Can be.

That is, since the through-holes 32 are formed at different heights in the partition 31 partitioning the wastewater tank 30, the wastewater moves up and down in the process of moving to each space (S1-> S2-> S3). Alternately, natural flow occurs, and together with the air supply pipe 80, the bubbles generated through the nozzle 82 are continuously raised, so that the overall convection occurs and the flow force of the bubbles is the heat recovery pipe 40. It acts to prevent the scale from sticking.

However, the conventional heat pump system using the wastewater heat source generates relatively high pressures due to the continuously generated bubbles at the same pressure irrespective of the amount of scale generated on the surface of the heat recovery tube, that is, contamination, and thus, a relatively high operating cost is generated. There is a problem that the efficiency is lowered.

In addition, the conventional heat pump system using a wastewater heat source has another problem that the thermal efficiency is lowered because the outside air is supplied through the blower and the air bubbles are generated through the blower to lower the wastewater temperature in the wastewater tank when the outside air temperature is low.

The present invention is to solve the above problems, by detecting the degree of contamination according to the scale generated on the surface of the heat recovery pipe, and set the pressure and time according to the degree of contamination, and generates bubbles accordingly to operate only when the scale is generated relative The purpose of this invention is to provide a heat pump system that can be descaled to reduce operating costs.

In addition, the present invention is to check the temperature of the outside air and waste water to prevent the lowering of the waste water temperature in the waste water tank by the air bubble by supplying after heating using a heater when the outside air is drawn in when the temperature difference occurs, and the waste water temperature according to the selection Another aim is to provide a descalable heat pump system that is supplied at higher temperatures to increase thermal efficiency.

Features of the present invention for achieving the above object,

Hot water use place using hot water; A filtration unit for filtering particulate solid sludge from the wastewater discharged from the hot water use destination; A wastewater tank in which wastewater passing through the filtration unit is stored for a predetermined time; A heat recovery pipe for circulating water into the waste water tank; A heat storage tank for accumulating heat sources recovered through the heat recovery pipes; A heat pump configured to perform cooling, heating, and hot water using a heat source accumulated in the heat storage tank; A hot water tank in which hot water heat exchanged by the heat pump is stored; An air supply pipe for supplying air in the form of a bubble from the bottom of the waste water tank; A heat pump system comprising: scale detection means for detecting the scale of the surface of the heat recovery pipe is installed on the surface of the heat recovery pipe; A blowing fan for supplying air to the air supply pipe by changing a rotation speed according to an external control; And detecting the pollution degree according to the scale generated on the surface of the heat recovery pipe through the scale detection means, and controlling the rotation speed and the rotation time of the blowing fan according to the pollution degree by using the air bubble supplied through the air supply pipe. It further comprises a controller for removing the scale generated on the surface of the heat recovery pipe.

Herein, the descalable heat pump system includes a first temperature sensor detecting a temperature in the waste water tank; A second temperature sensor detecting an outside temperature; And heating means installed on the air supply pipe to generate heat according to external control.

Here, the controller compares the wastewater temperature detected by the first temperature sensor with the outside air temperature detected by the second temperature sensor, and controls the heating means by controlling the heating means when the outside air temperature is lower than the wastewater temperature. Heat the outside air introduced into the wastewater tank through.

Here, the heating means is a heating wire located in the air supply pipe.

Here, the scale detecting means attaches a first electrode to one surface of the heat recovery tube, attaches a second electrode attached to the other surface of the heat recovery tube, and then attaches a voltage to the first electrode or the second electrode. The voltage or current sensor is applied to detect the intensity of the voltage or current according to the intensity of the voltage or current detected by the second electrode or the first electrode.

According to the present invention, the scale-removable heat pump system configured as described above detects the degree of contamination according to the scale generated on the surface of the heat recovery tube, sets the pressure and time according to the degree of contamination, and then generates bubbles accordingly. It can only operate the system at a relatively small operating cost.

In addition, according to the present invention by checking the temperature of the outside air and waste water, if the temperature difference occurs, by using a heater when the outside air is drawn in and supplied by the air supply to prevent the waste water temperature in the waste water tank is lowered by bubbles, and the waste water according to the selection It is possible to increase the thermal efficiency by supplying a temperature higher than the temperature.

Hereinafter, the configuration of a heat pump system capable of removing the scale according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

2 is a schematic diagram showing a configuration of a heat pump system capable of removing a scale according to the present invention, and FIG.

2 and 3, the heat pump system 100 capable of removing the scale according to the present invention includes a hot water use place 10, a filtration unit 20, a waste water tank 30, and a heat recovery pipe 40. ), Heat storage tank (50), heat pump (60), hot water tank (70), air supply pipe (80), scale detecting means (110), first temperature sensor (120), second The temperature sensor 130, the heating means 140, the blowing fan 150, and the controller 160.

First, the hot water use place 10, the filtration unit 20, the waste water tank 30, the heat recovery pipe 40, the heat storage tank 50, the heat pump 60, the hot water tank 70 and , The air supply pipe 80 is given the same reference numerals as in the prior art in the same configuration as the prior art, and the description thereof will be omitted.

Then, the scale detecting unit 110 is installed on the surface of the heat recovery tube 40 to detect the scale of the surface of the heat recovery tube 40. Here, the scale detecting unit 110 attaches the first electrode 111 to one surface of the heat recovery tube 40 and attaches the second electrode 113 attached to the other surface of the heat recovery tube 40. The voltage or current is detected by applying a voltage or current to the first electrode 111 or the second electrode 113 according to the intensity of the voltage or current detected by the second electrode 113 or the first electrode 111. Is a voltage or current sensor. That is, the scale detecting unit 110 applies a voltage or a current to the first electrode 111 or the second electrode 113 as shown in FIG. When the voltage or current is detected, the resistance value is increased by the scale generated on the surface of the heat recovery tube 40 so that the intensity of the voltage or current is varied. This enables the controller 160 to detect the contamination level. have.

Then, the first temperature sensor 120 detects the temperature in the waste water tank (30). Here, the first temperature sensor 120 is preferably installed below the wastewater level in the wastewater tank 30.

In addition, the second temperature sensor 130 detects the outside air temperature. Here, the second temperature sensor 130 is preferably installed at the inlet side of the air supply pipe (80).

In addition, the heating means 140 is a heating wire located in the air supply pipe 80, and generates heat under the control of the controller 160 to heat the outside air introduced into the air supply pipe 80.

On the other hand, the blowing fan 150 is supplied with air to the air supply pipe 80 is the rotational speed is variable under the control of the controller 160.

Then, the controller 160 detects the pollution degree according to the scale generated on the surface of the heat recovery pipe 40 through the scale detecting unit 110, and the rotation speed (pneumatic) and rotation time of the blower fan 150 according to the pollution degree. Controlling to remove the scale generated on the surface of the heat recovery pipe 40 by using the bubble supplied through the air supply pipe (80). Here, the controller 160 compares the wastewater temperature detected by the first temperature sensor 120 with the outside air temperature detected by the second temperature sensor 130 when the blower fan 150 is driven, and thus the outside air temperature is the wastewater temperature. When lower, the heating means 140 is controlled to supply air by heating the air flowing into the waste water tank 30 through the air supply pipe 80.

Hereinafter, the operation of the heat pump system capable of removing the scale according to the present invention will be described.

First, the process of performing cooling, heating, and hot water supply in the heat pump 60 using the heat source accumulated in the heat storage tank 50 is the same as in the related art.

On the other hand, the controller 160 detects the degree of contamination according to the scale generated on the surface of the heat recovery tube 40 through the intensity of the voltage or current detected by the scale detecting means 110.

Thus, the controller 160 calculates the rotational speed and the rotation time of the blowing fan 150 according to the pollution degree. In this case, it is preferable that the rotation speed and the rotation time of the blower fan 150 according to the pollution degree are pre-stored in the form of a table in the controller 160, and the controller 160 searches for the rotation speed and the rotation time according to the pollution degree and calculates the result. do.

The controller 160 compares the wastewater temperature detected by the first temperature sensor 120 with the outside air temperature detected by the second temperature sensor 130.

As a result, when the outside air temperature is lower than the waste water temperature, the air supply pipe 80 after driving the heating means 140 and the blowing fan 150 is heated by the heating means 140, the outside air flowing through the blowing fan 150. It is supplied into the heat storage tank (50) through.

Then, bubbles generated by the air supplied from the air supply pipe 80 are raised in the heat storage tank 50 to remove the scale generated on the surface of the heat recovery pipe 40.

Meanwhile, the controller 160 continuously compares the wastewater temperature detected by the first temperature sensor 120 with the outside air temperature detected by the second temperature sensor 130 even during operation of the blower fan 150. Control the operation of

The controller 160 ends the operation of the blower fan 150 when the rotation time of the blower fan 150 calculated by counting time ends. At this time, when the heating means 140 operates, the heating means 140 also ends the operation at the same time.

As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

1 is a system diagram showing a heat pump system using a conventional wastewater heat source,

2 is a system diagram showing a configuration of a heat pump system capable of removing a scale according to the present invention;

3 is an explanatory diagram for explaining scale detection means in a heat pump system capable of removing a scale according to the present invention;

10: hot water use 20: filtration unit

30: waste water tank 40: heat recovery pipe

50: heat storage tank 60: heat pump

80: air supply pipe 100: scale detection means

120: first temperature sensor 130: second temperature sensor

140: heating means 150: blowing fan

160: controller

Claims

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Hot water use place using hot water; A filtration unit for filtering particulate solid sludge from the wastewater discharged from the hot water use destination; A wastewater tank in which wastewater passing through the filtration unit is stored for a predetermined time; A heat recovery pipe for circulating water into the waste water tank; A heat storage tank for accumulating heat sources recovered through the heat recovery pipes; A heat pump configured to perform cooling, heating, and hot water using a heat source accumulated in the heat storage tank; A hot water tank in which hot water heat exchanged by the heat pump is stored; In the heat pump system including; Air supply pipe for supplying air in the form of bubbles from the waste water tank,

Scale detection means provided on a surface of said heat recovery tube for detecting a scale of the surface of said heat recovery tube;

A blowing fan for supplying air to the air supply pipe by changing a rotational speed according to external control;

A first temperature sensor detecting a temperature in the waste water tank;

A second temperature sensor detecting an outside temperature; And

Heating means installed on the air supply pipe to generate heat according to external control; And

The scale detection means detects the pollution degree according to the scale generated on the surface of the heat recovery pipe, and controls the rotational speed and rotation time of the blowing fan according to the pollution degree by using the air bubble supplied through the air supply pipe A descalable heat pump system comprising a controller for removing the scale generated on the surface of the tube.

The method of claim 2,

The controller comprising:

When the outside air temperature is lower than the waste water temperature by comparing the waste water temperature detected by the first temperature sensor and the outside air temperature detected by the second temperature sensor, the heating means is controlled to flow into the waste water tank through the air supply pipe. A descalable heat pump system, characterized by heating outside air.

The method of claim 3, wherein

The heating means,

A scale removal heat pump system, characterized in that the heating wire located in the air supply pipe.

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