Heat exchange scale inhibiting device and application system

Abstract

The present application relates to a kind of heat exchange scale inhibition device and application system, belong to water heater technical field.The present application is by being arranged heat exchange scale inhibitor between the water inlet end and the water outlet end of heat exchanger, the structure of the heat exchange scale inhibitor is ingenious, when secondary side tap water supply heat exchanger has water by its water inlet flow, from its water outlet, tap water supply water is entered into the water outlet of heat exchange scale inhibitor via the water inlet of secondary side tap water supply heat exchanger, water will flow into heat exchange scale inhibitor by the water inlet of heat exchange scale inhibitor.When the water flow of secondary side tap water supply heat exchanger stops, water in heat exchange scale inhibitor will flow out from heat exchange scale inhibitor, flow into heat exchanger, thereby reduce the static equilibrium temperature of water in heat exchanger secondary side, its beneficial effect is: protect the formation of scale in heat exchanger secondary side heat exchange structure, improve heat exchange efficiency, reduce energy loss, can also effectively prolong the maintenance time of heat exchanger, even prolong the life cycle of heat exchanger, reduce use cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a heat exchange scale prevention device and application system, belonging to the technical field of water heaters. BACKGROUND

[0002] In the field of application of existing domestic and industrial secondary side tap water supply heat exchangers, heat exchangers are widely used in tap water supply, including tap water direct heating systems or systems directly supplemented with tap water as a water source. In this paper, the tap water supply is used to describe this type of water supply.

[0003] In the above system, for example: in the commercial field, there are laundry water heating application systems, and there are bathing water heating systems; in the domestic field, there are heat exchangers of gas volume water heaters, there are bathing water side heating heat exchangers of wall-mounted stove water systems, and there are applications of gas instantaneous fast water heaters. In the application of these systems, the application process is not long-term continuous use, and there is one or even more start-stop every day, and the flow rate of the water flowing through the heat exchanger is one of the control conditions for starting the heat exchange work of the heat exchanger.

[0004] In the above system application, there is a problem of scale formation in the heat exchanger, and in the industrial and commercial fields, it is also a major issue for equipment operation and maintenance. Such maintenance is carried out every year, every half year or even every month, and often a soft water system is also equipped, which is very expensive, and is one of the main reasons for equipment failure or scrap. In the domestic field, it is also the main reason for the repair of domestic water heaters, especially in areas with high water hardness, even in some areas, the main reason for the application of a domestic soft water system is due to the serious scale problem or the high operating cost; but even so, due to the complexity and difficulty of the maintenance of household appliances, users cannot operate or forget, which causes the product to be damaged or scrapped; especially now many heat exchangers are designed with complex heat exchange pipelines in order to improve heat exchange efficiency or other performance, once scale is formed, the possibility of repairing the product is very small, which brings not small economic burden or loss to the user. SUMMARY

[0005] The purpose of the present application is to solve the problem of scale formation in the heat exchanger of the prior art, especially for the complex pipeline design of the heat exchanger, to propose a heat exchange scale prevention device and application system, to design the application of the heat exchange scale prevention device in the system, and to protect the most prone to scale formation part of the heat exchanger, so that the scale formation problem of the product is significantly improved, and even the domestic product application life cycle does not need to be maintained, thereby effectively solving the scale formation problem of the user in the use process, reducing the loss caused by the maintenance or even scrap of the product by the user.

[0006] In the case of tap water as direct water or water replenishment main water source, the water flow flowing through the heat exchanger has a flow rate which is one of the control conditions for the heat exchanger to start heat exchange work. In order to achieve the above purpose and meet the above operation conditions, the technical scheme of the present application is as follows:

[0007] The present application first provides a heat exchange scale inhibition device, which comprises a heat exchange scale inhibitor arranged between the water inlet end and the water outlet end of a heat exchanger, the heat exchange scale inhibitor has a water-containing cavity structure, the cavity structure has a high-temperature water inlet and a low-temperature water inlet, an outlet is arranged on the cavity structure near the low-temperature water inlet, one end of the outlet is connected to an outlet valve structure arranged inside the cavity structure, the outlet valve structure is connected to a diaphragm structure, the diaphragm structure divides the cavity structure into a high-temperature water cavity structure containing the high-temperature water inlet and an outlet cavity structure containing the low-temperature water inlet, a one-way water flow check structure is arranged at the low-temperature water inlet, one end of the outlet valve structure is located in the outlet cavity structure and communicates with the outlet cavity structure, the other end of the outlet valve structure is located in the high-temperature water cavity structure, a constant-pressure elastic mechanism connected to the diaphragm structure is arranged in the high-temperature water cavity structure, and the other end of the outlet is connected to a pipeline through which tap water is supplied to the heat exchanger.

[0008] The diaphragm structure of the above structure is an elastic diaphragm, which can change shape and resist the pressure difference between the two sides of the diaphragm. When the diaphragm structure applies pressure to the constant-pressure elastic mechanism, the constant-pressure elastic mechanism can provide an equal and opposite force to balance the pressure of the diaphragm structure.

[0009] A solvent is arranged in the outlet cavity structure, and the solvent core can release water-soluble solvent in the water in the outlet cavity structure.

[0010] The outlet valve structure is composed of an outlet valve water inlet structure, an outlet valve water outlet structure, a valve core structure and a water pressure driving port, the outlet valve water inlet structure communicates with the valve core structure, the valve core structure communicates with the outlet valve water outlet structure, and the valve core structure is connected to the water pressure driving port. The valve core structure is composed of a valve core valve rod and a valve core diaphragm structure for controlling the water flow of the outlet valve water outlet structure, the valve core diaphragm structure is connected to the water pressure driving port, and the valve core diaphragm structure can drive the valve core valve rod to move; the movement of the valve core valve rod can control the water flow and on-off of the outlet valve water outlet structure. The outlet valve water inlet structure communicates with the outlet cavity structure; the outlet valve water outlet structure communicates with the outlet; and the water pressure driving port communicates with the high-temperature water cavity structure.

[0011] The low-temperature water inlet is provided with a one-way water flow stop structure to prevent water in the water outlet cavity structure from flowing out of the low-temperature water inlet of the heat exchange scale inhibitor.

[0012] The water outlet is provided with a water pump to control the water flow direction to the water outlet and discharge the water in the cavity structure.

[0013] The application further provides an application system of the heat exchange scale inhibitor, when applied to a heat exchanger, the heat exchanger comprises a primary side high-temperature heat exchange structure and a secondary side tap water supply heat exchanger, the secondary side tap water supply heat exchanger comprises a heat exchanger low-temperature water inlet, a heat exchanger high-temperature water outlet, a high-temperature scale prevention water inlet and a heat exchanger body structure, the heat exchanger low-temperature water inlet and the heat exchanger high-temperature water outlet are respectively connected to the heat exchanger body structure through pipelines, the high-temperature scale prevention water inlet is arranged on a tap water supply pipeline of the heat exchanger body structure, a scale inhibitor low-temperature water inlet is arranged at a connection point of the heat exchanger low-temperature water inlet and the heat exchanger body structure, a scale inhibitor high-temperature water inlet is arranged at a connection point of the heat exchanger high-temperature water outlet and the heat exchanger body structure, the low-temperature water inlet of the heat exchange scale inhibitor is connected to the scale inhibitor low-temperature water inlet, the high-temperature water inlet of the heat exchange scale inhibitor is connected to the scale inhibitor high-temperature water inlet, and the water outlet of the heat exchange scale inhibitor is connected to the high-temperature scale prevention water inlet. The high-temperature scale prevention water inlet is located on a pipe section of the heat exchanger where scale is prone to be generated.

[0014] The structure of the application is ingenious, when the secondary side tap water supply heat exchanger has water flowing in from the water inlet and flowing out from the water outlet, the tap water supply water enters the water outlet of the heat exchange scale inhibitor through the water inlet of the secondary side tap water supply heat exchanger, and due to the pressure difference between the water inlets and the water outlets of the secondary side tap water supply heat exchanger, the water flows into the heat exchange scale inhibitor from the water inlet of the heat exchange scale inhibitor. When the water flow of the secondary side tap water supply heat exchanger stops, the water in the heat exchange scale inhibitor flows out of the heat exchange scale inhibitor and flows into the heat exchanger. Thus, the standing balance temperature of the water in the secondary side of the heat exchanger is reduced, which has the beneficial effects of protecting the scale generation in the heat exchange structure of the secondary side of the heat exchanger, improving the heat exchange efficiency, reducing the energy loss, effectively prolonging the maintenance time of the heat exchanger, even prolonging the life cycle of the heat exchanger and reducing the use cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below with reference to the drawings.

[0016] Figure 1 The structure diagram of an embodiment of the system of the application applied to a household gas rapid water heater.

[0017] Figure 2 The structure diagram of an embodiment of the system of the application applied to a household gas rapid water heater. Figure 1 The structure diagram of an embodiment of the system of the application applied to a household gas rapid water heater.

[0018] Figure 3 For Figure 2 Schematic view of the water outlet valve structure. DETAILED DESCRIPTION

[0019] Embodiments

[0020] The structure of the present embodiment is shown in Figures 1-3 A heat exchange scale inhibition device and application system, the heat exchange scale inhibition device is used in the heat exchange scale inhibition device application system 10, the application system 10 includes a heat exchanger and a heat exchange scale inhibitor 102.

[0021] The heat exchanger includes a primary side high temperature heat exchange structure and a secondary side tap water supply heat exchanger 101. The secondary side tap water supply heat exchanger 101 includes a heat exchanger low temperature water inlet 1012, a heat exchanger high temperature water outlet 1011, a high temperature scale prevention water inlet 1015 and a heat exchanger body structure. The heat exchanger low temperature water inlet 1012 is connected to the heat exchanger body structure; the heat exchanger high temperature water outlet 1011 is connected to the heat exchanger body structure; the tap water supply flows through the heat exchanger low temperature water inlet 1012, the heat exchanger body structure and the heat exchanger high temperature water outlet 1011 in sequence. During heat exchange, the tap water supply has a higher outlet water temperature at the heat exchanger high temperature water outlet 1011 than the inlet water temperature at the heat exchanger low temperature water inlet 1012 after passing through the secondary side low temperature heat exchanger structure; the high temperature scale prevention water inlet 1015 is arranged on the pipeline through which the tap water supply flows in the heat exchanger body structure.

[0022] The connection point of the heat exchanger low temperature water inlet 1012 and the heat exchanger body is provided with a scale inhibitor low temperature water inlet interface 1014.

[0023] The connection point of the heat exchanger high temperature water outlet 1011 and the heat exchanger body is provided with a scale inhibitor high temperature water inlet interface 1013.

[0024] The heat exchange scale inhibitor 102 comprises a low-temperature water inlet 10203, a high-temperature water inlet 10202, a cavity structure 10201, a diaphragm structure 10210, a water outlet valve structure 10206 and a water outlet 10205. The low-temperature water inlet 10203 of the heat exchange scale inhibitor 102 is connected to the scale inhibitor low-temperature water inlet interface 1014 of the secondary side tap water supply heat exchanger 101; the high-temperature water inlet 10202 of the heat exchange scale inhibitor 102 is connected to the scale inhibitor high-temperature water inlet interface 1013 of the secondary side tap water supply heat exchanger 101; the water outlet of the heat exchange scale inhibitor 10205 is connected to the heat exchange scale inhibitor water outlet interface 10204, and the heat exchange scale inhibitor water outlet interface 10204 is connected to the high-temperature scale prevention water inlet 1015. The cavity structure 10201 is arranged between the low-temperature water inlet 10203 of the heat exchange scale inhibitor 102 and the high-temperature water inlet 10202 of the heat exchange scale inhibitor 102, and can accommodate a certain volume of water. The diaphragm structure 10210 is arranged in the cavity structure of the heat exchange scale inhibitor 102, and divides the cavity structure 10201 into a water outlet cavity structure 102012 and a high-temperature water cavity structure 102011. The diaphragm structure can adjust the water capacity of the water outlet cavity structure 102012 and the water capacity of the high-temperature water cavity structure 102011; the water outlet cavity structure 102012 and the high-temperature water cavity structure 102011 are not connected.

[0025] The low-temperature water inlet 10203 of the heat exchange scale inhibitor 102 is connected to the water outlet cavity structure 102012. The high-temperature water inlet 10202 of the heat exchange scale inhibitor 102 is connected to the high-temperature water cavity structure 102011.

[0026] The water outlet 10205 is connected to the water outlet valve structure 10206, and the water outlet valve structure 10206 is connected to the water outlet cavity structure 102012. The water in the water outlet cavity structure 102012 can flow to the water outlet 10205 through the water outlet valve structure 10206. The water outlet valve structure 10206 can control the flow and on-off of the water.

[0027] When the diaphragm structure 10210 is subjected to pressure on both sides, it can adjust the water capacity of the water inlet cavity structure 101011 and the water outlet cavity structure 102012, and at the same time, the diaphragm mechanism can generate a corresponding reaction pressure to balance the stress on both sides of the diaphragm.

[0028] The high-temperature water cavity structure 102011 is provided with a pressure elastic mechanism 10211 connected to the diaphragm structure 10210.

[0029] The diaphragm structure 10210 comprises a diaphragm made of elastic material, which can change shape and resist the pressure difference on both sides of the diaphragm.

[0030] When the diaphragm structure 10210 exerts pressure on the constant pressure elastic mechanism 10211, the constant pressure elastic mechanism 10211 can provide the same counterforce to balance the pressure of the diaphragm structure 10210.

[0031] The solvent core 10220 is arranged in the water outlet cavity structure 102012, and the solvent core 10220 can release water-soluble solvent in the water in the water outlet cavity structure 102012.

[0032] The water outlet valve structure 10206 includes a water inlet structure 102062, a water outlet structure 102061, a valve core structure 102064, and a water pressure driving port 102063. The water inlet structure 102062 is connected to the valve core structure 102064, and the valve core structure 102064 is connected to the water outlet structure 102061. The valve core structure 102064 is connected to the water pressure driving port 102063.

[0033] The valve core structure 102064 includes a valve core valve rod 1020641 and a valve core diaphragm structure 1020642. The valve core diaphragm structure 1020642 is connected to the water pressure driving port 102063 of the water outlet valve structure 10206, and the valve core diaphragm structure 1020642 is connected to the valve core valve rod 1020641 of the water outlet valve structure 10206. The valve core diaphragm structure 1020642 can drive the valve core valve rod 1020641 to move, and the movement of the valve core valve rod 1020641 can control the water flow and on-off of the water outlet structure 102061.

[0034] The water inlet structure 102062 of the water outlet valve structure 10206 is connected to the water outlet cavity structure 102012, the water outlet structure 102061 of the water outlet valve structure 10206 is connected to the water outlet 10205, and the water pressure driving port 102063 of the water outlet valve structure 10206 is connected to the high-temperature water cavity structure 102011.

[0035] The low-temperature water inlet 10203 is provided with a one-way water flow stop structure to prevent the water in the water outlet cavity structure 102012 of the heat exchange scale inhibitor 102 from flowing out of the low-temperature water inlet 10203 of the heat exchange scale inhibitor 102.

[0036] The working process is as follows:

[0037] When water flows in the secondary side tap water supply heat exchanger 101, i.e. the water flows from the low temperature water inlet 1012 into the heat exchanger 101, and flows out from the high temperature water outlet 1011 after being heated. Since the water pressure of the low temperature water inlet 1012 of the secondary side tap water supply heat exchanger 101, i.e. the low temperature water inlet 10203 of the heat exchanger scale inhibitor 102, is greater than the water pressure of the high temperature scale prevention water inlet 1015 of the secondary side tap water supply heat exchanger 101, i.e. the heat exchanger scale inhibitor outlet 10204 of the heat exchanger scale inhibitor 102; the water pressure of the high temperature scale prevention water inlet 1015 of the secondary side tap water supply heat exchanger 101, i.e. the heat exchanger scale inhibitor outlet 10204 of the heat exchanger scale inhibitor 102, is greater than the water pressure of the high temperature water outlet 1011 of the secondary side tap water supply heat exchanger 101, i.e. the low temperature water inlet 10202 of the heat exchanger scale inhibitor 102.

[0038] Under the driving of the pressure, the water flows from the low temperature water inlet 10203 of the heat exchanger scale inhibitor 102 into the water outlet cavity structure 102012 of the heat exchanger scale inhibitor 102, and contacts the solvent core 10220 in the water outlet cavity structure 102012, and the solvent in the solvent core is released into the incoming new water; at the same time, the diaphragm structure 10210 of the heat exchanger scale inhibitor 102 is driven to move, and the volume of the water outlet cavity structure 102012 is increased. At the same time, the volume of the high temperature water cavity structure 102011 of the heat exchanger scale inhibitor 102 is also reduced, and the water therein is discharged through the low temperature water inlet 10202 of the heat exchanger scale inhibitor 102. Until the diaphragm structure 10210 of the heat exchanger scale inhibitor 102 reaches the structural tension, which can offset the force of the water pressure difference and store the potential energy of the water pressure difference. At the same time, the water pressure of the water pressure driving port 102063 of the water outlet valve structure 10206, i.e. the water pressure on one side of the valve core diaphragm structure 1020642, is the pressure of the water inlet cavity structure 102011 of the heat exchanger scale inhibitor 102; the pressure on the other side of the valve core diaphragm structure 1020642 is the pressure of the water inlet structure 102062 of the water outlet valve structure 10206, which is the pressure of the low temperature water inlet 10203 of the heat exchanger scale inhibitor 102. At this time, the valve core diaphragm structure 1020642 drives the valve core valve rod 1020641 to close the water outlet of the water outlet structure 102061 of the water outlet valve, and the water cannot flow out from the water outlet structure 102061 of the water outlet valve, i.e. the water outlet 10205.

[0039] When the system (here the system refers to the existing control system, which will not be described again.) detects that the water flow in the secondary side tap water supply heat exchanger structure 101 of the low temperature water inlet 1012 and the high temperature water outlet 1011 connection point outside the tap water supply heat exchanger 101 stops flowing, according to the flow rate of the heat exchanger water flow, which is also one of the control conditions for the heat exchanger to start heat exchange work, the heat source of the primary side high temperature heat exchange structure will also stop heating the secondary side tap water supply heat exchanger structure 101 in a very short time. But the high temperature heat retained in the high temperature heat exchange structure will still be transferred to the secondary side tap water supply heat exchanger structure 101, until the temperature is the same.

[0040] At the same time, due to the inertia effect of the water flowing in the secondary side tap water supply heat exchanger structure 101, the water pressure at the outlet 1011 of the secondary side tap water supply heat exchanger structure 101, that is, the low temperature water inlet 10203 of the heat exchange scale inhibitor 102, is less than the water pressure at the high temperature water outlet 1011 of the secondary side low temperature heat exchanger structure 101, that is, the high temperature water inlet 10202 of the heat exchange scale inhibitor 102. Under the driving of the pressure difference, the water will flow from the high temperature water inlet 10202 of the heat exchange scale inhibitor 102 into the high temperature water cavity structure 102011 of the heat exchange scale inhibitor 102; at the same time, it will drive the diaphragm structure 10210 of the heat exchange scale inhibitor 102 to move, and the diaphragm structure 10210 will also release the stored tension potential energy at this time; the water in the outlet cavity structure 102012 of the heat exchange scale inhibitor 102 will flow into the high temperature scale prevention water inlet 1015 of the secondary side low temperature heat exchanger structure 101 through the outlet interface 10204 of the heat exchange scale inhibitor 102. At this time, since the low temperature water inlet 10203 is provided with a one-way water flow stop structure, the water in the outlet cavity structure 102012 will not flow out from the low temperature water inlet 10203 of the heat exchange scale inhibitor 102. The valve core diaphragm structure 1020642 pushes the valve core valve rod 1020641 to open the outlet of the outlet valve water outlet structure 102061, and the water will flow out from the outlet valve water outlet structure 102061, that is, the outlet valve water outlet structure 102061 communicates with the outlet 10205, and then directly injects the water containing the solvent into the pipe section most prone to scale in the heat exchanger.

[0041] Under the driving of the pressure, the water flowing into the high temperature scale prevention water inlet 1015 of the secondary side low temperature heat exchanger structure 101 will flow into the heat exchanger body of the secondary side low temperature heat exchanger structure 101. After a period of time, the water flow will stop exchanging before 101 and 102.

[0042] In the process, because the temperature of the water in the cavity structure 10201 of the heat exchange scale inhibitor 102 is relatively low, when the water in the cavity structure 10201 enters the heat exchanger of the secondary side low-temperature heat exchanger structure 101, the water with a relatively high temperature in the heat exchanger body is replaced; after the flow is stopped, compared with the design without the heat exchange scale inhibitor 102, the temperature of the water flowing in the heat exchanger body to reach the equilibrium temperature is effectively reduced; at the same time, after the water containing the solvent is injected into the pipe section of the secondary side low-temperature heat exchanger structure 101 which is most prone to scale, especially into the place where the scaling problem is more serious, the lower equilibrium temperature makes the water standing in the heat exchanger body obviously improve the condition of precipitating scale. Compared with the conventional application that a certain amount of solvent is dissolved in all the water passing through the heat exchanger, the amount of solvent used in the present application is much smaller than that used in the conventional application, and the purpose of reducing scale is also achieved.

[0043] In addition to the above-mentioned embodiments, the present application can also have other implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present application.

Claims

1. A heat exchange scale inhibitor device, comprising a heat exchange scale inhibitor disposed between the inlet and outlet ends of a heat exchanger, characterized in that: The heat exchange scale inhibitor has a water-accommodating cavity structure with a high-temperature inlet and a low-temperature inlet. An outlet is located near the low-temperature inlet. One end of the outlet is connected to an outlet valve structure housed inside the cavity structure. The outlet valve structure is connected to a diaphragm structure, which divides the cavity structure into two non-connected sections: a high-temperature water cavity containing the high-temperature inlet and an outlet water cavity containing the low-temperature inlet. A one-way flow stop structure is provided at the low-temperature inlet. One end of the outlet valve structure is located inside and connected to the outlet water cavity structure, while the other end is located inside the high-temperature water cavity structure. The cavity structure is equipped with a constant pressure elastic mechanism connecting the diaphragm structure. The other end of the outlet is connected via a pipeline to the water supply pipeline on the heat exchanger. The diaphragm structure is an elastic membrane. The outlet cavity structure contains a solvent. The outlet valve structure consists of an outlet valve inlet structure, an outlet valve outlet structure, a valve core structure, and a water pressure drive port. The outlet valve inlet structure is connected to the valve core structure, the valve core structure is connected to the outlet valve outlet structure, and the valve core structure is connected to the water pressure drive port. The valve core structure consists of a valve core stem and a valve core diaphragm structure that control the flow rate of the outlet valve outlet structure. The valve core diaphragm structure is connected to the water pressure drive port. The water inlet structure of the outlet valve is connected to the water outlet cavity structure; The water outlet valve's outlet structure is connected to the water outlet; the water pressure drive port is connected to the high-temperature water reservoir structure.

2. The heat exchange scale inhibitor device according to claim 1, characterized in that: The low-temperature water inlet is equipped with a water flow control valve.

3. The heat exchange scale inhibitor device according to claim 1, characterized in that: The outlet is equipped with a water pump that controls the water flow towards the outlet.

4. The application system of the heat exchange scale inhibitor according to claim 1, characterized in that: The heat exchanger includes a primary-side high-temperature heat exchange structure and a secondary-side tap water supply heat exchanger. The secondary-side tap water supply heat exchanger includes a low-temperature inlet, a high-temperature outlet, a high-temperature anti-scaling inlet, and a heat exchanger body structure. The low-temperature inlet and high-temperature outlet are respectively connected to the heat exchanger body structure via pipelines. The high-temperature anti-scaling inlet is located on the tap water supply pipeline passing through the heat exchanger body structure. The connection point between the low-temperature inlet and the heat exchanger body is equipped with a scale inhibitor low-temperature inlet interface. The connection point between the high-temperature outlet and the heat exchanger body is equipped with a high-temperature inlet port for a scale inhibitor. The low-temperature inlet of the heat exchange scale inhibitor is connected to the low-temperature inlet port of the scale inhibitor, the high-temperature inlet of the heat exchange scale inhibitor is connected to the high-temperature inlet port of the scale inhibitor, and the outlet of the heat exchange scale inhibitor is connected to the high-temperature scale inlet.

5. The application system of the heat exchange scale inhibitor according to claim 4, characterized in that: The high-temperature anti-scaling inlet is located on a section of the heat exchanger that is prone to scale buildup.

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