Water heat storage electric heating system

Abstract

The utility model provides a water heat storage electric heating system which comprises a heat storage water tank, a water pump, a temperature adjusting valve, a heating device, a water supply waterway, a heating waterway, an electric heater and a temperature control circuit. The heat storage water tank comprises a first water inlet and a first water outlet; the temperature adjusting valve comprises a second water inlet, a second water outlet and a third water outlet; the water supply waterway is connected with the first water outlet and the second water outlet; one end of the water pump is connected with the water supply waterway, the other end of the water pump is connected with the heating device, and the heating device is connected with the second water inlet; the electric heater is connected with a power supply end power supply through a temperature control circuit, and a time control module and a heating temperature control module which are connected in series are arranged on the temperature control circuit; the heating temperature control module comprises a heating temperature sensor, and when the water temperature obtained by the heating temperature sensor is lower than a heating low-temperature threshold value set by the heating temperature control module, the electric heater is powered on for heating. According to the invention, the overall system structure is simplified, and the use convenience is improved.

Description

Technical Field

[0001] The present application relates to the field of water thermal storage heat exchange circuits, and primarily to a water thermal storage electric heating system. Background Art

[0002] Cleaner heating in rural areas is imperative. With the booming development of new energy, the use of thermal storage electric heating devices offers significant advantages. Water thermal storage is particularly well-suited for rural areas in the northwest and northeast regions. Water thermal storage technology is an important energy storage and utilization method. It uses water as a thermal storage medium, heating and storing it during periods of low energy supply (such as nighttime power outages). The stored heat is then released during peak energy demand (such as daytime power peaks) to meet user heating needs and effectively balance the grid load. However, current water thermal storage systems typically consist of a hot water storage tank, a heating unit, a heat release unit, a switching circuit for heat storage, heat release, and simultaneous storage and release, a power supply, and a control unit. The water tank is connected in parallel with the heating and heat release circuits, making it complex and costly, making it difficult to scale and adapt to rural areas. Therefore, a simplified water circuit design method is being considered. For example, heating pipes can be built into outdoor water tanks for heating. However, this will bring certain electrical safety issues. At the same time, water tanks can only be provided by manufacturers and cannot be built by users themselves, and the cost is still high. In addition, the applicant also adopted a solution that removed the water circuit switching part in the applications with patent numbers 201910543873.X and 201920947024.6, but still required two sets of water pumps for the heat storage and heat release circuits. The control system generally uses a single-chip microcomputer or PLC, and the operating logic is still difficult for the majority of elderly rural users to understand. Therefore, there is an urgent need for a water storage thermal electric heating system that is suitable for the permanent population in rural areas and has low cost, high reliability, and easy operation. Summary of the Invention

[0003] To solve the above problems, the present application provides a water thermal storage electric heating system, comprising a water storage tank, a water pump, a thermostatic valve, a heating device, a water supply circuit, a heating circuit, an electric heater, and a temperature control circuit;

[0004] The hot water storage tank includes a first water inlet and a first water outlet;

[0005] The thermostatic valve includes a second water inlet, a second water outlet and a third water outlet;

[0006] The water supply channel connects the first water outlet and the second water outlet;

[0007] One end of the water pump is connected to the water supply waterway, and the other end of the water pump is connected to the heating device, and the heating device is connected to the second water inlet; wherein, the water pump can draw hot water from the first water inlet, and at the same time can draw cold water from the second water outlet, and after mixing the water, it enters the heating device for heat exchange, and the cold water after heat dissipation flows into the second water inlet;

[0008] The electric heater is connected to the power supply terminal of the power supply through the temperature control circuit, and a time control module and a heating temperature control module are connected in series on the temperature control circuit; wherein, the time control module can set the time period for obtaining valley electricity; the heating temperature control module includes a heating temperature sensor, and the heating temperature sensor is arranged on the pipe wall of the heating waterway. When the water temperature obtained by the heating temperature sensor is lower than the heating low temperature threshold set by the heating temperature control module, the electric heater is powered on for heating.

[0009] Wherein, preferably, the temperature control circuit further includes a heat compensation circuit, and the heat compensation circuit is connected in parallel with the temperature control circuit; a heat compensation temperature control module is arranged on the heat compensation circuit, and the heat compensation temperature control module includes a heat compensation temperature sensor; when the water temperature obtained by the heat compensation temperature sensor is lower than the heat compensation low temperature threshold set by the heat compensation temperature control module, the electric heater is powered on for heating;

[0010] Wherein, the heat compensation temperature sensor is arranged between the electric heater and the temperature regulating valve, and the heating temperature sensor is arranged between the hot water storage tank and the electric heater.

[0011] Wherein, preferably, the temperature control circuit includes a heating branch and a solenoid valve branch, and the temperature control circuit is connected to the heating branch and the solenoid valve branch through a normally closed contact and a normally open contact respectively; [[ID=?]]

[0012] The heating branch is connected to the electric heater;

[0013] The solenoid valve branch includes a solenoid valve, and the solenoid valve is arranged on the water replenishing waterway, and the water replenishing waterway is connected to the water supply waterway and the heating waterway; when the output water temperature of the electric heater reaches the heating high temperature threshold set by the heating temperature control module, the normally open contact of the temperature control circuit is switched on, the solenoid valve is powered on and switched on, and the water flow of the water supply waterway immediately rushes into the heating waterway to reduce the water temperature.

[0014] Wherein, preferably, a solid state switch and a thermal protection switch are connected in series in the heating branch; wherein, the thermal protection switch can prevent overheating when the heating temperature control module fails.

[0015] Wherein, preferably, the time control module is a mechanical multi-stage time control switch, the heating temperature control module is a thermostatic bulb type mechanical temperature control switch, the solid state switch uses a non-contact solid state switch, and the temperature regulating valve is a memory alloy mixing valve.

[0016] Preferably, an exhaust valve is provided on the hot water storage tank, and the hot water storage tank is closed and replenished by a high-position open replenishment method.

[0017] Preferably, the water discharge flows of the second water outlet and the third water outlet can be adjusted according to the temperature adjustment set value of the temperature adjustment valve; when the water temperature flowing into the temperature adjustment valve is higher than the temperature adjustment set value, the water discharge flow of the third water outlet decreases, and the water discharge flow of the second water outlet increases. When the water pump pumps water, the hot water from the hot water storage tank decreases, and the mixed water temperature decreases; when the water temperature flowing into the temperature adjustment valve is lower than the temperature adjustment set value, the water discharge flow of the third water outlet increases, and the water discharge flow of the second water outlet decreases. When the water pump pumps water, the hot water from the hot water storage tank increases, and the mixed water temperature increases, increasing the heating capacity of the heating device.

[0018] Preferably, when the water temperature obtained by the supplementary heat temperature sensor is lower than the supplementary heat low temperature threshold set by the supplementary heat temperature control module, the temperature adjustment valve has directed all the flow to the third water outlet.

[0019] The beneficial effects achieved by this application are as follows:

[0020] The circuits of the heating heat release process and the water tank heat storage process of this application are used in series. The heat release and heating can work simultaneously to complete the function of heat storage while releasing heat. In addition, the heat release process and the heat storage process share a water pump, which simplifies the system. The operation is simple and fast by only using a mechanical control switch, which is especially suitable for people in rural areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to illustrate this application more clearly, the specification drawings of this application will be described and explained below. Obviously, the drawings in the following description only illustrate some aspects of certain exemplary embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic circuit diagram of the water storage thermoelectric heating system of this application.

[0023] In the figure: 1 is a heat storage water tank, 2 is a water pump, 3 is a temperature regulating valve, 4 is a heating device, 5 is a water supply waterway, 6 is a heating waterway, 7 is an electric heater, 8 is a temperature control circuit, 9 is a water replenishing waterway, 11 is a first water inlet, 12 is a first water outlet, 13 is an exhaust valve, 31 is a second water inlet, L is a second water outlet, H is a third water outlet, 81 is a temperature control circuit, 82 is a heat supplement circuit, 83 is a heating branch, 84 is a solenoid valve branch, 811 is a time control module, 812 is a heating temperature control module, 821 is a heat supplement temperature control module, 831 is a solid state switch, 832 is a thermal protection switch, 833 is a heat storage lamp, 841 is a solenoid valve, A is a heating temperature sensor, B is a heat supplement temperature sensor. Detailed implementation manners

[0024] The following describes various exemplary embodiments of the present disclosure in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangements, numerical expressions and numerical values of the components and steps described in these embodiments should be construed as merely exemplary and not as limitations.

[0025] The present application provides a water storage thermal electric heating system, as Figure 1 shown, which includes a heat storage water tank 1, a water pump 2, a temperature regulating valve 3, a heating device 4, a water supply waterway 5, a heating waterway 6, an electric heater 7, a temperature control circuit 8 and a water replenishing waterway 9;

[0026] The heat storage water tank 1 can store hot water for heating supply. An exhaust valve 13 is provided on the heat storage water tank 1. The heat storage water tank is closed and replenished with water in a high-position open water replenishing manner. The heat storage water tank 1 includes a first water inlet 11 and a first water outlet 12.

[0027] The temperature regulating valve 3 can adjust the water temperature of the heating device 4. The temperature regulating valve 3 includes a second water inlet 31, a second water outlet (denoted by L in the drawing) and a third water outlet (denoted by H in the drawing);

[0028] Among them, in the present application, the water flow heated and then stored in the heat storage water tank is set as hot water, and the water flow after heat exchange and heat dissipation by the heating device is set as cold water. The hot water temperature is usually set to 80°C - 90°C, and the cold water temperature is usually set to 40°C - 65°C.

[0029] As Figure 1As shown, one end of the water pump 2 is connected to the water supply waterway 5, and the water supply waterway 5 is connected to the first water outlet 12 of the heat storage water tank 1 and the second water outlet (L port) of the temperature regulating valve 3; the other end of the water pump 2 is connected to the heating device 4, and the heating device 4 is connected to the second water inlet 31 of the temperature regulating valve 3; wherein, the water pump 2 can draw hot water from the first water outlet 12 of the heat storage water tank 1, and at the same time can draw cold water from the second water outlet (L port) of the temperature regulating valve 3. After mixing hot and cold water, it enters the heating device 4 for heat exchange heating, and after heat dissipation, it flows back to the second water inlet 31 of the temperature regulating valve 3; wherein, when the water temperature flowing back to the temperature regulating valve 3 is too high and exceeds the temperature regulation set value set by the temperature regulating valve 3, the cold water flow output from the second water outlet (L port) increases, and the hot water flow of the heat storage water tank 1 decreases, so as to cool the water flow entering the heating device 4; when the water temperature flowing back to the temperature regulating valve 3 is too low and lower than the temperature regulation set value set by the temperature regulating valve 3, the cold water flow output from the second water outlet (L port) decreases, and the hot water flow output from the heat storage water tank 1 increases, so as to increase the temperature of the water flow entering the heating device 4.

[0030] The heating waterway 6 is connected to the third water outlet (H port) of the temperature regulating valve 3 and the first water inlet 11 of the heat storage water tank 1, and an electric heater 7 is arranged on the heating waterway 6; wherein, the cold water flowing out from the third water outlet (H port) of the temperature regulating valve 3 is heated by the electric heater 7 and then enters the heat storage water tank 1;

[0031] The electric heater 7 is connected to the power supply end through the temperature control circuit 8, and the temperature control circuit 8 includes a parallel-connected temperature control circuit 81 and a heat supplement circuit 82;

[0032] A time control module 811 and a heating temperature control module 812 are arranged in series on the temperature control circuit 81; wherein, the time control module 811 can set the time period for obtaining valley electricity; the heating temperature control module 812 includes a heating temperature sensor A; the heating temperature sensor A of the heating temperature control module 812 is arranged on the pipe wall of the heating waterway 6. Preferably, in this embodiment, the heating temperature sensor A is arranged between the electric heater 7 and the heat storage water tank 1. When the water flow temperature flowing to the heat storage water tank 1 is lower than the set heating low temperature threshold of the heating temperature control module 812, the electric heater 7 heats the water flow;

[0033] Wherein, the temperature control circuit 81 is connected to the heating branch 83 and the solenoid valve branch 84 through a single-pole double-throw switch inside through a normally closed contact and a normally open contact respectively;

[0034] The heating branch includes a solid-state switch 831, a thermal protection switch 832 and a heat storage lamp 833; wherein, the thermal protection switch 832 can prevent overheating when the heating temperature control module 812 fails.

[0035] The solenoid valve branch includes a solenoid valve 841, which is arranged on the water replenishing waterway 9. The water replenishing waterway 9 connects the water supply waterway 5 and the heating waterway 6;

[0036] Wherein, when the water flow temperature flowing to the hot water storage tank 1 is lower than the heating low temperature threshold set by the heating temperature control module 812, the solid state switch 831 is powered on and turned on. The power supply passes through the solid state switch 831 and then through the thermal protection of the thermal protection switch 832 to turn on the electric heater 7.

[0037] When the temperature in the hot water storage tank 1 gradually rises, the flow rate becomes smaller. When the water temperature output by the electric heater 7 reaches the heating high temperature threshold set by the heating temperature control module 812, the heating temperature control module 812 is disconnected, and the electric heater 7 stops heating. At this time, the solenoid valve 841 is powered on and connected, and the water flow of the water supply waterway 5 enters the heating waterway 6, quickly reducing the water temperature output of the water flow in the electric heater 7. When the water flow temperature of the hot water storage tank 1 is lower than the heating low temperature threshold set by the heating temperature control module 812, the solid state switch 831 is turned on, and the electric heater 7 starts heating again.

[0038] A heat supplement temperature control module 821 is arranged on the heat supplement circuit 82. The heat supplement temperature control module 821 includes a heat supplement temperature sensor B; when the hot water temperature released from the hot water storage tank 1 is too low and the water temperature is still lower than the heat supplement low temperature threshold set by the heat supplement temperature control module 821 after all the flow of the temperature regulating valve 3 flows to the third water outlet (H port), at this time, the heat supplement temperature control 821 turns on the power supply terminal, the solid state switch is turned on, and the electric heater 7 starts heating.

[0039] The heat supplement temperature sensor B of the heat supplement circuit 82 is arranged on the pipe wall of the heating waterway 6. Preferably, it is arranged between the third water outlet (H port) of the temperature regulating valve 3 and the electric heater 7.

[0040] Wherein, in this embodiment, the time control switch used by the time control module 811 is a mechanical multi-stage switch, and the heating temperature control module 812 is a temperature sensing bulb type mechanical temperature regulating switch. The settings of these two switches are intuitive and simple, convenient to operate. The temperature control circuit 81 requires normally open and normally closed contacts, and the heat supplement circuit 82 only requires normally open contacts; the solid state switch 831 uses a non-contact solid state switch, which can reduce the noise during switching and increase the service life; the temperature regulating valve 3 adopts a common memory alloy mixing valve, which can directly manually adjust the mixed water temperature; the structure of the hot water storage tank 1 is very simple and can be built by users themselves.

[0041] The use of words such as "including" or "comprising" in this disclosure means that the elements before this word are covered by the elements listed after this word, and it does not exclude the possibility of also covering other elements.

[0042] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in accordance with a general dictionary should be construed to have a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless explicitly so defined herein.

[0043] For components not described in detail in this section, specific model parameters of components, the interrelationships between components, and control circuits, they can be considered as technologies, methods, and devices known to those of ordinary skill in the relevant art. However, in appropriate cases, the said technologies, methods, and devices should be regarded as part of the specification.

[0044] It should be understood that the specific embodiments described above are only used to explain this application, and the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application, based on the technical solutions of this application and its application concept, makes changes, substitutions, and combinations, and should be covered within the protection scope of this application.

Claims

1. A water thermal storage electric heating system, characterized in that: Including hot water storage tank, water pump, thermostatic valve, heating device, water supply waterway, heating waterway, electric heater and temperature control circuit; The hot water storage tank includes a first water inlet and a first water outlet; The thermostatic valve includes a second water inlet, a second water outlet and a third water outlet; The water supply channel connects the first water outlet and the second water outlet; One end of the water pump is connected to the water supply channel, and the other end of the water pump is connected to the heating device, and the heating device is connected to the second water inlet; wherein the water pump can pump hot water from the first water inlet and simultaneously pump cold water from the second water outlet, and the mixed water enters the heating device for heat exchange, and the cold water after heat dissipation flows into the second water inlet; The electric heater is connected to the power supply end through the temperature control circuit, and the temperature control circuit is provided with a time control module and a heating temperature control module in series; wherein, the time control module can set the time period for obtaining valley electricity; the heating temperature control module includes a heating temperature sensor, and the heating temperature sensor is arranged on the pipe wall of the heating water channel. When the water temperature obtained by the heating temperature sensor is lower than the heating low temperature threshold set by the heating temperature control module, the electric heater is powered on for heating.

2. The water thermal storage electric heating system according to claim 1, characterized in that: The temperature control circuit further includes a supplementary heating circuit, which is connected in parallel with the temperature control circuit; a supplementary heating temperature control module is provided on the supplementary heating circuit, and the supplementary heating temperature control module includes a supplementary heating temperature sensor; when the water temperature obtained by the supplementary heating temperature sensor is lower than the supplementary heating low temperature threshold set by the supplementary heating temperature control module, the electric heater is energized for heating; Wherein, the supplementary heat temperature sensor is arranged between the electric heater and the temperature regulating valve, and the heating temperature sensor is arranged between the hot water storage tank and the electric heater.

3. The water thermal storage electric heating system according to claim 2, characterized in that: The temperature control circuit includes a heating branch and a solenoid valve branch, and the temperature control circuit uses a single-pole double-throw switch to connect the heating branch and the solenoid valve branch respectively through a normally closed contact and a normally open contact; The heating branch is connected to the electric heater; The solenoid valve branch includes a solenoid valve, which is arranged on a water supply waterway, and the water supply waterway connects the water supply waterway and the heating waterway; when the output water temperature of the electric heater reaches the heating high temperature threshold set by the heating temperature control module, the normally open contact of the temperature control circuit is connected, the solenoid valve is energized, and the water flow from the water supply waterway immediately flows into the heating waterway, thereby lowering the water temperature of the heating waterway.

4. The water thermal storage electric heating system according to claim 3, characterized in that: The heating branch is connected in series with a solid-state switch and a thermal protection switch; wherein, the use of the thermal protection switch can prevent overheating when the heating temperature control module fails.

5. The water thermal storage electric heating system according to claim 4, characterized in that: in, The time control module is a mechanical multi-stage time control switch, the heating temperature control module is a temperature-sensing package type mechanical temperature control switch, the solid-state switch uses a contactless solid-state switch, and the temperature control valve is a memory alloy water mixing valve.

6. The water thermal storage electric heating system according to claim 1, characterized in that: The heat storage tank is provided with an exhaust valve, and the heat storage tank is closed and replenished with water in a high-position open water replenishment manner.

7. The water thermal storage electric heating system according to claim 2, characterized in that: The water flow rates of the second water outlet and the third water outlet can be adjusted according to the temperature adjustment set value of the temperature adjustment valve; wherein, when the temperature of the water flowing into the temperature adjustment valve is higher than the temperature adjustment set value, the water flow rate of the third water outlet decreases, the water flow rate of the second water outlet increases, the hot water from the hot water tank decreases when the water pump pumps water, and the mixed water temperature entering the heating device decreases; when the temperature of the water flowing into the temperature adjustment valve is lower than the temperature adjustment set value, the water flow rate of the third water outlet increases, the water flow rate of the second water outlet decreases, the hot water from the hot water tank increases when the water pump pumps water, and the mixed water temperature entering the heating device increases.

8. The water thermal storage electric heating system according to claim 7, characterized in that: When the water temperature obtained by the supplementary heating temperature sensor is lower than the supplementary heating low temperature threshold set by the supplementary heating temperature control module, the temperature regulating valve has directed all flow to the third water outlet.

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