Gas heating stove with water return function

Abstract

A gas heating stove with a water return function comprises a water inlet, a heating water outlet, a heating water return port, a first heat exchanger, a circulating pump system and a first water pump, the circulating pump system is connected with the water inlet and the heating water return port, one end of the first heat exchanger is connected with the circulating pump system, and the other end of the first heat exchanger is connected with the first water pump which is connected with the heating water outlet. The heating water outlet is communicated with the heating water return port. The circulating pump system is arranged at the water return end of the gas heating furnace, the first water pump is arranged at the water outlet end of the gas heating furnace, the circulating pump system controls external cold water and heating return water to enter the heat exchanger, the first water pump controls heating outlet water for life use, and the circulating pump system is composed of two water pumps. The two water pumps can be opened independently or simultaneously, the water pressure and the water flow speed can be improved through the multiple water pumps, and the situation that the water pressure of a high-rise or super high-rise building is low is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, in particular to a gas heating furnace with a water return function. Background Art

[0002] Chinese patent document No. CN109869911A disclosed on June 11, 2019 a gas-fired constant temperature heating furnace, including a heating heat exchanger, a circulating pump and a bathroom heat exchanger, and also a heat exchange water storage tank, wherein the heat exchange water storage tank is equipped with a heat exchange coil; when providing bathroom water, the heating water flows through the circulating pump, the heating heat exchanger, the heat exchange coil in the heat exchange water storage tank and the bathroom heat exchanger in sequence to form a main circulation; the required bathroom water enters the heat exchange water storage tank after passing through the bathroom heat exchanger, is mixed and supplied after heat exchange. In this gas constant temperature heating furnace, bathroom water is stored in the heat exchange water tank after heat exchange in the bathroom heat exchanger, and the temperature of the bathroom water is maintained constant through heat exchange by the heat exchange coil in the heat exchange water tank. When bathroom water is used, the bathroom water flows out of the heat exchange water tank. This heating furnace has only one circulating water pump, which is arranged on the heating return pipe. The circulating water pump drives the heating water to flow in, out and circulate. However, if a single water pump is used to drive the heating water to flow in, out and circulate, if it is used in high-rise or super-high-rise buildings, there will be insufficient water pressure and slow water flow, affecting the user experience.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of the utility model is to provide a gas heating furnace with a water return function which has a simple structure, sufficient water outlet pressure, long service life, good user experience and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A gas heating furnace with a water return function designed for this purpose is characterized by comprising a water inlet, a heating water outlet, a heating water return outlet, a first heat exchanger, a circulating pump system and a first water pump, the circulating pump system being respectively connected to the water inlet and the heating water return outlet, one end of the first heat exchanger being connected to the circulating pump system and the other end being connected to the first water pump, the first water pump being connected to the heating water outlet, and the heating water outlet being connected to the heating water return outlet.

[0006] The circulation pump system includes a second water pump and a third water pump.

[0007] The second water pump and the third water pump are arranged in series, the second water pump is respectively connected to the water inlet and the heating return water outlet, and the third water pump is connected to one end of the first heat exchanger.

[0008] The second water pump and the third water pump are arranged in parallel, and the second water pump and the third water pump are respectively connected to the water inlet and the heating return water outlet, and one end of the first heat exchanger is respectively connected to the second water pump and the third water pump.

[0009] It also includes a control device, which is electrically connected to the first heat exchanger, the first water pump, the second water pump and the third water pump, and controls the operation of the first water pump, the second water pump and / or the third water pump.

[0010] A flow meter for detecting water flow is arranged on the pipeline between one end of the first heat exchanger and the circulation pump system. The control device is electrically connected to the flow meter, and the water flow value detected by the flow meter is fed back to the control device.

[0011] A temperature sensor for detecting the outlet water temperature is arranged on the pipeline between the other end of the first heat exchanger and the first water pump. The control device is electrically connected to the temperature sensor, and the temperature value detected by the temperature sensor is fed back to the control device.

[0012] A temperature controller is arranged on the pipeline between the other end of the first heat exchanger and the first water pump, and the control device is electrically connected to the temperature controller.

[0013] It also includes a second heat exchanger, one end of which is connected to the first water pump, and the other end of which is connected to the circulation pump system.

[0014] The invention also includes a burner for heating the first heat exchanger, wherein the burner is located below the first heat exchanger.

[0015] The utility model arranges a circulation pump system at the return water end of the gas heating furnace and a first water pump at the water outlet end of the gas heating furnace. The circulation pump system controls external cold water and heating return water to enter the heat exchanger. The first water pump controls the heating outlet water for daily use. The circulation pump system is composed of two water pumps. The two water pumps can be turned on separately or both can be turned on at the same time. Through multiple water pumps, the water pressure and water flow speed can be increased to prevent low water pressure in high-rise or super-high-rise buildings. Moreover, the two water pumps of the circulation pump system can be controlled separately. The corresponding water pumps can be turned on according to actual needs to avoid wasting electric energy and increase the service life of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the water circuit of a gas heating furnace in a first application example of an embodiment of the utility model.

[0017] Figure 2 This is a schematic diagram of the water circuit of a gas heating furnace in the second application example of an embodiment of the utility model.

[0018] Figure 3 It is a schematic diagram of the overall structure of a gas heating furnace in one embodiment of the utility model. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figure 1-Figure 3The gas heating furnace with water return function comprises a water inlet 1, a heating water outlet 2, a heating water return port 3, a first heat exchanger 4, a circulating pump system 5 and a first water pump 6. The circulating pump system 5 is respectively connected to the water inlet 1 and the heating water return port 3. One end of the first heat exchanger 4 is connected to the circulating pump system 5 and the other end is connected to the first water pump 6. The first water pump 6 is connected to the heating water outlet 2. The heating water outlet 2 is connected to the heating water return port 3, and the heating water outlet 2 is connected to the heating end.

[0021] The circulation pump system 5 includes a second water pump 7 and a third water pump 8 .

[0022] like Figure 1 As shown, the second water pump 7 and the third water pump 8 are arranged in series, the second water pump 7 is respectively connected to the water inlet 1 and the heating return water port 3, and the third water pump 8 is connected to one end of the first heat exchanger 4; the two water pumps are arranged in series, which can increase the head of the water pump and thus increase the water outlet pressure.

[0023] Or, if Figure 2 As shown, the second water pump 7 and the third water pump 8 are arranged in parallel, and the second water pump 7 and the third water pump 8 are respectively connected to the water inlet 1 and the heating return water port 3, and one end of the first heat exchanger 4 is respectively connected to the second water pump 7 and the third water pump 8; the two water pumps are arranged in parallel, which can increase the water outlet flow rate and improve the water outlet pressure.

[0024] The control device 9 is also included. The control device 9 is electrically connected to the first heat exchanger 4, the first water pump 6, the second water pump 7 and the third water pump 8 respectively. The control device 9 controls the first water pump 6, the second water pump 7 and / or the third water pump 8 to work. The control device 9 is a control circuit board. The first water pump 6, the second water pump 7 and the third water pump 8 are all independently controlled by the control device 9. When the water demand is not large (such as when users are at work during the day and the water demand of the building is small), the first water pump 6 can be controlled to start, and the second water pump 7 or the third water pump 8 can be controlled to start. When the water demand is large (such as when users are at home at night and the water demand of the building is large), the first water pump 6, the second water pump 7 and the third water pump 8 can be controlled to start; in addition, the circulation pump system 5 is provided with two water pumps. If one of them is broken, the other one is available, so that the gas heating furnace will not be forced to stop working.

[0025] A flow meter 10 for detecting water flow is arranged on the pipeline between one end of the first heat exchanger 4 and the circulation pump system 5. The control device 9 is electrically connected to the flow meter 10. The water flow value detected by the flow meter 10 is fed back to the control device 9. The control device 9 controls the flow of the second water pump 7 and / or the third water pump 8 according to the flow value detected by the flow meter 10.

[0026] A temperature sensor 11 for detecting the outlet water temperature is arranged on the pipeline between the other end of the first heat exchanger 4 and the first water pump 6. The control device 9 is electrically connected to the temperature sensor 11. The temperature value detected by the temperature sensor 11 is fed back to the control device 9. The control device 9 controls the outlet water temperature by controlling the fire power of the burner or the flow rate of the water pump according to the detected temperature value.

[0027] A thermostat 12 is provided on the pipeline between the other end of the first heat exchanger 4 and the first water pump 6 , and the control device 9 is electrically connected to the thermostat 12 ; the outlet water temperature can be adjusted by the thermostat 12 .

[0028] The second heat exchanger 13 is also included, one end of which is connected to the first water pump 6 and the other end is connected to the circulation pump system 5; specifically, the electric three-way valve 15 is also included, the a end of the electric three-way valve 15 is connected to the first water pump 6, the b end is connected to the heating water outlet 3, and the c end is connected to the second heat exchanger 13; the control device 9 is electrically connected to the electric three-way valve 15 and the second heat exchanger 13 respectively, and the second heat exchanger 13 is a plate heat exchanger; when the gas heating furnace supplies water, the electric three-way valve 15 switches the a end and the c end to connect When the gas heating furnace is used for heating, the electric three-way valve 15 switches the connection between the a-end and the b-end, and the water circuit connectivity is as follows: the first heat exchanger 4-the first water pump 6-the electric three-way valve 15-the heating water outlet 2-the heating end-the heating water return port 3-the circulating pump system 5-the first heat exchanger 4, and an external circulation passage is formed.

[0029] It also includes a hot water outlet 16. The end b of the electric three-way valve 15 is connected to the hot water outlet 16, and the hot water outlet 16 can be connected to a faucet.

[0030] The invention also includes a burner 14 for heating the first heat exchanger 4 , and the burner 14 is located below the first heat exchanger 4 .

[0031] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A gas heating furnace with water return function, characterized in that: The heating system comprises a water inlet (1), a heating water outlet (2), a heating water return outlet (3), a first heat exchanger (4), a circulating pump system (5) and a first water pump (6); the circulating pump system (5) is connected to the water inlet (1) and the heating water return outlet (3), respectively; one end of the first heat exchanger (4) is connected to the circulating pump system (5) and the other end is connected to the first water pump (6); the first water pump (6) is connected to the heating water outlet (2), and the heating water outlet (2) is connected to the heating water return outlet (3).

2. The gas heating furnace with water return function according to claim 1, characterized in that: The circulation pump system (5) comprises a second water pump (7) and a third water pump (8).

3. The gas heating furnace with water return function according to claim 2, characterized in that: The second water pump (7) and the third water pump (8) are arranged in series, the second water pump (7) is connected to the water inlet (1) and the heating water return port (3) respectively, and the third water pump (8) is connected to one end of the first heat exchanger (4).

4. The gas heating furnace with water return function according to claim 2, characterized in that: The second water pump (7) and the third water pump (8) are arranged in parallel, and the second water pump (7) and the third water pump (8) are respectively connected to the water inlet (1) and the heating water return port (3), and one end of the first heat exchanger (4) is respectively connected to the second water pump (7) and the third water pump (8).

5. The gas heating furnace with water return function according to claim 2, characterized in that: The invention also comprises a control device (9), wherein the control device (9) is electrically connected to the first heat exchanger (4), the first water pump (6), the second water pump (7) and the third water pump (8), respectively, and the control device (9) controls the operation of the first water pump (6), the second water pump (7) and / or the third water pump (8).

6. The gas heating furnace with water return function according to claim 4, characterized in that: A flow meter (10) for detecting water flow is provided on the pipeline between one end of the first heat exchanger (4) and the circulation pump system (5); the control device (9) is electrically connected to the flow meter (10); and the water flow value detected by the flow meter (10) is fed back to the control device (9).

7. The gas heating furnace with water return function according to claim 4, characterized in that: A temperature sensor (11) for detecting the outlet water temperature is provided on the pipeline between the other end of the first heat exchanger (4) and the first water pump (6); the control device (9) is electrically connected to the temperature sensor (11); and the temperature value detected by the temperature sensor (11) is fed back to the control device (9).

8. The gas heating furnace with water return function according to claim 4, characterized in that: A temperature controller (12) is provided on the pipeline between the other end of the first heat exchanger (4) and the first water pump (6), and the control device (9) is electrically connected to the temperature controller (12).

9. The gas heating furnace with water return function according to claim 1, characterized in that: It also includes a second heat exchanger (13), one end of the second heat exchanger (13) being connected to the first water pump (6) and the other end being connected to the circulation pump system (5).

10. The gas heating furnace with water return function according to claim 1, characterized in that: It also includes a burner (14) for heating the first heat exchanger (4), wherein the burner (14) is located below the first heat exchanger (4).

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