A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating

Abstract

The utility model belongs to the technical field of boiler heat exchange equipment, and specifically relates to a boiler heat exchange device structure based on air-cooled heat pump and boiler coupling heating. The utility model has a compact overall structure and is easy to operate through the reasonable arrangement of the internal heat exchanger, bypass pipeline, and three-way regulating valve of the boiler. In conjunction with the pipeline connection of the air-cooled heat pump unit, water supply pump, and electric butterfly valve, it can effectively ensure the stability of the water temperature at the boiler outlet in cold weather, and can minimize carbon emissions to achieve the purpose of energy saving and emission reduction while meeting the needs of indoor heating and hot water use.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler heat exchange equipment, and in particular relates to a boiler heat exchange device structure based on air-cooled heat pump and boiler coupling heating. Background Art

[0002] Since air conditioning, heating and sanitary hot water supply in buildings require a lot of energy, currently these energy sources mainly come from natural gas, diesel, coal, electricity, etc.; in order to achieve the goal of energy conservation and emission reduction, it is necessary to reduce the consumption of primary energy (such as natural gas).

[0003] The existing air-cooled heat pump unit absorbs heat from the surrounding atmosphere through the refrigerant compression cycle to achieve the purpose of heating. Therefore, the temperature and humidity of the environment have a great influence on the heating capacity of the unit. When the outdoor temperature is low, the heat load required for building heating and sanitary hot water increases, but the heating capacity of the air-cooled heat pump unit gradually decreases, resulting in failure to meet the needs of heating and sanitary hot water; at this time, unless the capacity configuration of the air-cooled heat pump unit is increased, it is difficult to ensure the indoor heating load and sanitary hot water demand in cold weather.

[0004] However, increasing the capacity of the air-cooled heat pump unit will not only increase the initial investment, but also the outlet water temperature will drop as the outdoor temperature drops, which will affect the comfort of indoor heating and the use of sanitary hot water; and when the outdoor temperature drops to a certain level, the unit heat carbon emissions of the air-cooled heat pump unit are greater than the carbon emissions of a gas boiler, which cannot meet the requirements of energy conservation and emission reduction. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a boiler heat exchange device structure based on air-cooled heat pump and boiler coupling heating is provided, which has a compact overall structure and is easy to operate, and can effectively ensure the stability of the water temperature at the boiler outlet in cold weather.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating, comprising a boiler heat exchanger 1, a bypass pipeline 2 and a three-way regulating valve 3 arranged inside the boiler 100, the boiler heat exchanger 1 is arranged in the furnace of the boiler 100, and the bypass pipeline 2 is arranged outside the furnace of the boiler 100; the input end of the boiler heat exchanger 1 is connected to the water inlet 8 of the boiler 100, and the output end is connected to the a end of the three-way regulating valve 3, the water inlet 8 is also connected to the b end of the three-way regulating valve 3 through the bypass pipeline 2, and the c end of the three-way regulating valve 3 is connected to the water outlet 9 of the boiler 100.

[0008] Furthermore, the water inlet 8 of the boiler 100 is connected to the water outlet of the air-cooled heat pump unit 200 through a main water inlet pipeline, and the water inlet of the air-cooled heat pump unit 200 is connected to the output end of the cold water supply pump 300. The output end of the cold water supply pump 300 is also directly connected to the water inlet 8 of the boiler 100 through a secondary water inlet pipeline, and an electric butterfly valve 400 is installed on the secondary water inlet pipeline.

[0009] Furthermore, the input end of the cold water supply pump 300 is connected to the cold water pipeline 500 in the building, and the water outlet 9 of the boiler 100 is connected to the hot water pipeline 600 in the building.

[0010] Furthermore, the middle portion of the bypass pipeline 2 is connected to one end of a normally closed solenoid valve 4 , and the other end of the normally closed solenoid valve 4 is directly connected to the water outlet 9 of the boiler 100 .

[0011] Furthermore, a temperature sensor 6 and a pressure sensor 7 are installed at the water inlet 8 and the water outlet 9 of the boiler 100 , and the temperature sensor 6 and the pressure sensor 7 are electrically connected to the normally closed solenoid valve 4 .

[0012] Furthermore, the three-way regulating valve 3 is specifically an electric three-way regulating valve.

[0013] Furthermore, flow sensors 5 are installed on the bypass pipeline 2 and at the output end of the boiler heat exchanger 1 .

[0014] Compared with the prior art, the utility model has the following main advantages:

[0015] The utility model provides a boiler heat exchange device arrangement structure based on air-cooled heat pump and boiler coupling heating. Through the reasonable arrangement of the heat exchanger, bypass pipeline and three-way regulating valve inside the boiler, the overall structure is compact and easy to operate. In conjunction with the pipeline connection of the air-cooled heat pump unit, water supply pump and electric butterfly valve, it can effectively ensure the stability of the water temperature at the boiler outlet in cold weather, and can minimize carbon emissions and achieve the purpose of energy saving and emission reduction while meeting the needs of indoor heating and hot water use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a boiler heat exchange device in an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the combined heating principle of an air-cooled heat pump and a boiler in an embodiment of the utility model.

[0018] In the figure: 1. boiler heat exchanger; 2. bypass pipeline; 3. three-way regulating valve; 4. normally closed solenoid valve; 5. flow sensor; 6. temperature sensor; 7. pressure sensor; 8. water inlet; 9. water outlet; 100. boiler; 200. air-cooled heat pump unit; 300. water supply pump; 400. electric butterfly valve; 500. cold water pipeline; 600. hot water pipeline. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0024] Embodiment 1: This embodiment provides a boiler heat exchange device based on air-cooled heat pump and boiler coupling heating, such as Figures 1-2As shown, it includes a boiler heat exchanger 1, a bypass pipeline 2 and a three-way regulating valve 3 arranged inside the boiler 100, the boiler heat exchanger 1 is arranged in the furnace of the boiler 100, and the bypass pipeline 2 is arranged outside the furnace of the boiler 100; the input end of the boiler heat exchanger 1 is connected to the water inlet 8 of the boiler 100, and the output end is connected to the a end of the three-way regulating valve 3, the water inlet 8 is also connected to the b end of the three-way regulating valve 3 through the bypass pipeline 2, and the c end of the three-way regulating valve 3 is connected to the water outlet 9 of the boiler 100.

[0025] Furthermore, the water inlet 8 of the boiler 100 is connected to the water outlet of the air-cooled heat pump unit 200 through a main water inlet pipeline, and the water inlet of the air-cooled heat pump unit 200 is connected to the output end of the cold water supply pump 300. The output end of the cold water supply pump 300 is also directly connected to the water inlet 8 of the boiler 100 through a secondary water inlet pipeline, and an electric butterfly valve 400 is installed on the secondary water inlet pipeline.

[0026] Furthermore, the input end of the cold water supply pump 300 is connected to the cold water pipeline 500 in the building, and the water outlet 9 of the boiler 100 is connected to the hot water pipeline 600 in the building.

[0027] Furthermore, the middle portion of the bypass pipeline 2 is connected to one end of a normally closed solenoid valve 4 , and the other end of the normally closed solenoid valve 4 is directly connected to the water outlet 9 of the boiler 100 .

[0028] Furthermore, a temperature sensor 6 and a pressure sensor 7 are installed at the water inlet 8 and the water outlet 9 of the boiler 100 , and the temperature sensor 6 and the pressure sensor 7 are electrically connected to the normally closed solenoid valve 4 .

[0029] Furthermore, the three-way regulating valve 3 is specifically an electric three-way regulating valve.

[0030] Furthermore, flow sensors 5 are installed on the bypass pipeline 2 and at the output end of the boiler heat exchanger 1 .

[0031] Embodiment 2: This embodiment provides a boiler heat exchange device based on air-cooled heat pump and boiler coupling heating. The boiler heat exchange device is suitable for air-cooled heat pump unit and boiler combined heating, and the heating can be used for air conditioning, heating and sanitary hot water. The boiler can be a gas (oil, etc.) vacuum hot water boiler or a normal pressure (pressure) hot water boiler.

[0032] In order to ensure the safe operation of the heating system and prevent the water supply temperature from being too high, which may cause the pipe to burst in the heating terminal device, the heat exchange device is equipped with a normally closed solenoid valve, and a variety of sensors are added and connected to the corresponding actuators. The heat exchange device of this boiler is particularly suitable for hot summers and cold winters and cold regions. It can not only ensure the heating demand, but also effectively reduce carbon emissions.

[0033] Mainly includes: heat exchanger, bypass pipe, electric three-way regulating valve, normally closed solenoid valve, temperature sensor, pressure sensor, flow sensor;

[0034] Among them, the forms of heat exchangers include tube type and plate type, and the area of ​​the heat exchanger is determined according to the heat exchange amount, water temperature and temperature difference, and the heat transfer coefficient of the heat exchanger.

[0035] Furthermore, the bypass pipe can realize the direct heating of the air-cooled heat pump unit without the water flowing through the heat exchanger, thereby reducing the water flow resistance loss and creating conditions for the frequency conversion of the heating circulation water pump, thereby reducing the power consumption and heat transfer ratio during heating.

[0036] Furthermore, the main function of the electric three-way regulating valve is: when the air-cooled heat pump unit and the boiler are combined for heating, the water flow of the bypass pipe and the heat exchanger is adjusted by the electric three-way regulating valve to ensure the stability of the water supply temperature.

[0037] Furthermore, the main function of the normally closed solenoid valve is to ensure the safe operation of the water system. When the temperature detected by the temperature sensor exceeds the set temperature, the solenoid valve opens the bypass, allowing the water originally flowing through the boiler heat exchanger to flow directly out of the bypass pipeline, thereby ensuring that the water supply temperature does not exceed the water temperature requirements used by the heating terminal device.

[0038] Furthermore, the main functions of the temperature sensor, pressure sensor and flow sensor are to display the temperature, pressure, flow and other parameters of the heating system, and to be linked with the normally closed solenoid valve.

[0039] The working principle of the heat exchanger is as follows:

[0040] The heat exchange device is suitable for combined heating of air-cooled heat pump and boiler, and the heating can be used for air conditioning, heating and sanitary hot water. The boiler can be a vacuum hot water boiler or a normal pressure (pressure) hot water boiler fueled by gas (oil, etc.).

[0041] The heat exchange device includes a boiler heat exchanger, a bypass pipe and auxiliary accessories arranged inside the boiler, wherein the heat exchanger is arranged in the boiler furnace, and the bypass pipe and auxiliary accessories are arranged outside the boiler furnace.

[0042] When the outdoor ambient temperature is high, the air-cooled heat pump unit is operated first to directly supply heat. The boiler does not operate and the bypass pipe of the heat exchanger is opened to ensure the normal operation of the heating system. As the outdoor ambient temperature drops, the air-cooled heat pump unit is insufficient to supply heat. At this time, the boiler is turned on for joint heating, in which the water flow of the heat exchanger is divided into two parts, that is, one part of the water passes through the heat exchanger and the other part of the water passes through the bypass pipe, and then flows through the electric three-way regulating valve for mixing to ensure the normal operation of the heating system. When the outdoor ambient temperature drops lower, the use of air-cooled heat pump units for heating no longer meets the use requirements and economic requirements, and the carbon emission calculation results are inappropriate. At this time, the boiler is used for direct heating, and the air-cooled heat pump unit stops running.

[0043] In order to ensure the safe operation of the heating system and prevent the water supply temperature from being too high and causing pipe bursts in the heating terminal device, the heat exchange device is equipped with a normally closed solenoid valve. When the water supply temperature measured by the temperature sensor exceeds the preset temperature value, the solenoid valve opens, and all the water flows directly out of the boiler through the bypass pipeline without passing through the heat exchanger.

[0044] Furthermore, all parts of the present application that are not described in detail are the same as the prior art or are implemented using the prior art.

[0045] In summary:

[0046] The utility model provides a boiler heat exchange device arrangement structure based on air-cooled heat pump and boiler coupling heating. Through the reasonable arrangement of the heat exchanger, bypass pipeline and three-way regulating valve inside the boiler, the overall structure is compact and easy to operate. In conjunction with the pipeline connection of the air-cooled heat pump unit, water supply pump and electric butterfly valve, it can effectively ensure the stability of the water temperature at the boiler outlet in cold weather, and can minimize carbon emissions and achieve the purpose of energy saving and emission reduction while meeting the needs of indoor heating and hot water use.

[0047] The above embodiments are only used to illustrate the design ideas and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly. The protection scope of the utility model is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the utility model are within the protection scope of the utility model.

Claims

1. A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating, characterized in that: The invention comprises a boiler heat exchanger (1), a bypass pipeline (2) and a three-way regulating valve (3) arranged inside a boiler (100); the boiler heat exchanger (1) is arranged inside the furnace of the boiler (100), and the bypass pipeline (2) is arranged outside the furnace of the boiler (100); the input end of the boiler heat exchanger (1) is connected to the water inlet (8) of the boiler (100), and the output end is connected to the end a of the three-way regulating valve (3); the water inlet (8) is also connected to the end b of the three-way regulating valve (3) through the bypass pipeline (2); and the end c of the three-way regulating valve (3) is connected to the water outlet (9) of the boiler (100).

2. A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating according to claim 1, characterized in that: The water inlet (8) of the boiler (100) is connected to the water outlet of the air-cooled heat pump unit (200) via a main water inlet pipeline, the water inlet of the air-cooled heat pump unit (200) is connected to the output of a cold water supply pump (300), and the output of the cold water supply pump (300) is directly connected to the water inlet (8) of the boiler (100) via a secondary water inlet pipeline, and an electric butterfly valve (400) is installed on the secondary water inlet pipeline.

3. A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating according to claim 2, characterized in that: The input end of the cold water supply pump (300) is connected to a cold water pipeline (500) in a building, and the water outlet (9) of the boiler (100) is connected to a hot water pipeline (600) in the building.

4. A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating according to claim 1, characterized in that: The middle portion of the bypass pipeline (2) is connected to one end of a normally closed electromagnetic valve (4), and the other end of the normally closed electromagnetic valve (4) is directly connected to the water outlet (9) of the boiler (100).

5. A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating according to claim 4, characterized in that: A temperature sensor (6) and a pressure sensor (7) are installed at the water inlet (8) and the water outlet (9) of the boiler (100), and the temperature sensor (6) and the pressure sensor (7) are electrically connected to the normally closed solenoid valve (4).

6. A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating according to claim 1, characterized in that: The three-way regulating valve (3) is specifically an electric three-way regulating valve.

7. A boiler heat exchange device based on air-cooled heat pump and boiler coupling heating according to claim 1, characterized in that: Flow sensors (5) are installed on the bypass pipeline (2) and at the output end of the boiler heat exchanger (1).

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