Water heater antifreeze system and control method thereof

Abstract

The present invention discloses a water heater antifreeze system and a control method thereof, comprising an electric heating block, a water solenoid valve, a circulating water pump and a connecting pipe assembly; the connecting pipe assembly comprises a first interface, a pipe body and a second interface, the first interface is connected to the water outlet interface of the water heater, and the second interface is connected to the water inlet interface of the water heater; the water solenoid valve is arranged on the pipe body, and the circulating water pump is arranged on the water pipe of the water heater. The water heater generates an internal circulation, and the water flowing in the internal circulation pipe is heated by a single electric heating block, thereby preventing the water heater from freezing.

Description

Technical Field

[0001] The invention relates to a water heater antifreeze system and a control method thereof. Background Art

[0002] After the gas water heater is installed, the internal water pipes are usually filled with tap water. When the ambient air temperature is too low, the water in the pipes will freeze. Common antifreeze water heaters mainly arrange heating blocks in the heat exchange body of the heat exchanger, before and after the flow sensor, and in the water outlet pipe. For water heaters with zero cold water function, electric heating blocks are also required to be arranged before and after the circulating water pump. The water pipes of the water heater are heated separately by multiple electric heating blocks to achieve antifreeze of the water pipes. In order to achieve the antifreeze purpose, electric heating blocks need to be arranged in multiple positions of the water pipes, resulting in a large number of electric heating blocks and high costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of high cost caused by the need to arrange a large number of heating blocks for the overall water heater pipeline during the antifreeze process in the prior art water heater, and to provide a water heater antifreeze system and a control method thereof.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A water heater antifreeze system includes an electric heating block, characterized in that it includes a water solenoid valve, a circulating water pump and a connecting pipe assembly; the connecting pipe assembly includes a first interface, a pipeline body and a second interface, the first interface is connected to the water outlet interface of the water heater, and the second interface is connected to the water inlet interface of the water heater; the water solenoid valve is arranged on the pipeline body, and the circulating water pump is arranged on the water pipeline of the water heater.

[0006] In this solution, the above-mentioned structural form is adopted, and by adding a connecting pipe assembly to the water heater, the water heater can achieve internal circulation based on the passage added by the connecting pipe assembly. Furthermore, a water solenoid valve is provided to control the switch of the passage, and the water solenoid valve opens and closes the passage according to work requirements. In this way, only a small number of heating blocks need to be arranged in the water heater to realize the circulation of hot water inside the water heater, meet the antifreeze requirements of the water heater, and reduce costs.

[0007] Preferably, the connecting pipe assembly comprises a heat exchange cavity, and the heat exchange cavity is arranged on the pipeline body. The electric heating block is located in the heat exchange cavity.

[0008] In this solution, the above-mentioned structural form is adopted to realize that the heat exchange chamber is arranged on the pipe body of the connecting pipe assembly, so that when the water circulates in the water heater, the water passes through the heat exchange chamber.

[0009] The electric heating block inside the heat exchange chamber exchanges heat with the water flowing through the heat exchange chamber, thereby raising the water temperature in the internal circulation pipeline. The water with the increased temperature circulates internally to prevent freezing of the internal pipeline of the water heater. The setting of the heat exchange chamber makes the heat exchange between water and the electric heating block more direct, thus improving the water heating effect.

[0010] At the same time, compared to setting the electric heating block on the outer surface of the pipe wall, a heat exchange chamber is set on the pipe body, and the water inside the pipe body is directly heated by the heat transfer of the electric heating block in the heat exchange chamber, so that the water inside the pipe can flow even when the pipe surface is frozen, thereby realizing the circulation antifreeze function inside the pipeline.

[0011] Preferably, the connecting pipe assembly comprises a pressure relief valve, and an opening of the pressure relief valve is arranged along the direction of gravity.

[0012] In this solution, the above-mentioned structural form is adopted, so that the pressure relief valve can release pressure and discharge water when circulating in the pipeline. When the pressure in the internal circulation pipeline increases due to the external temperature difference, the pressure relief valve can discharge the liquid and gas in the internal circulation of the water heater so that the air pressure in the internal circulation pipe is balanced with the outside. Avoid the rupture of the pipeline due to the pressure difference in the pipe. The opening of the pressure relief valve is arranged along the gravity direction, so that the water can be discharged smoothly under the action of gravity when the pressure relief valve is opened.

[0013] Preferably, the connecting pipe assembly includes a mounting groove and a heat sink; the electric heating block is installed in the mounting groove, the mounting groove is arranged in the heat exchange cavity, the mounting groove and the heat exchange cavity are hollow, and the heat sink is evenly distributed on the outer wall of the mounting groove.

[0014] In this solution, the above-mentioned structural form can be adopted to realize that the even distribution of the heat sinks can make the electric heating block transfer heat more evenly to the heat sinks distributed on the outer wall of the mounting groove, and the evenly distributed heat sinks can make the temperature of the water passing through evenly rise, so that the heat transfer effect is better. The hollow space between the mounting groove and the heat exchange cavity can make the electric heating block more fully exchange heat with the water, so that the water can be heated up quickly.

[0015] Preferably, the heat exchange chamber comprises a pressure relief valve mounting seat, the pressure relief valve mounting seat is arranged at the bottom of the heat exchange chamber, and the pressure relief valve is connected to the pressure relief valve mounting seat.

[0016] In this solution, the above-mentioned structural form is adopted, so that a pressure relief valve mounting seat can be provided at the bottom of the heat exchange chamber, which is convenient for the installation and connection of the pressure relief valve, so that the installation position of the pressure relief valve will not be seriously offset.

[0017] Preferably, the water solenoid valve includes a signal receiving component and a valve.

[0018] In this solution, the above-mentioned structural form is adopted, which can realize the switch control of the water solenoid valve by receiving the signal, and realize the free switching of whether the internal circulation needs to be used.

[0019] Preferably, a sealing ring is provided at the connection between the pressure relief valve mounting seat and the pressure relief valve.

[0020] In this solution, the above-mentioned structural form is adopted to achieve a tight connection between the pressure relief valve and the heat exchange chamber, and to achieve leak-proof protection between the pressure relief valve and the heat exchange chamber through the sealing ring.

[0021] Preferably, the circulating water pump is arranged on the water inlet pipe of the water heater.

[0022] In this solution, the above-mentioned structural form is adopted, so that when circulation antifreeze is required, the water in the water inlet pipe of the water heater is more than that in other pipes. The circulating water pump acts on the water inlet pipe of the water heater to make the water flow quickly, so that the water heater antifreeze system obtains enough flowing water to meet the internal circulation. When the water in the pipe is heated by the circulating water pump, the water can be antifreezed by the heat exchange system after being heated.

[0023] Preferably, the water heater antifreeze system comprises a temperature sensor, and the temperature sensor is arranged on a water pipe of the water heater.

[0024] In this solution, the above-mentioned structural form is adopted, so that the temperature sensor can be installed on the pipeline of the water heater to detect the temperature of the water inside the pipeline of the water heater. When the water temperature reaches the starting temperature set by the temperature sensor, the temperature sensor sends a starting signal to the water solenoid valve to open the internal circulation pipeline.

[0025] Preferably, the temperature sensor includes a water inlet temperature sensor and a water outlet temperature sensor.

[0026] In this solution, the above-mentioned structural form is adopted to realize that there are at least two temperature sensors, namely, an inlet water temperature sensor and an outlet water temperature sensor. The inlet water temperature sensor detects the water temperature entering the combustion heat exchange system of the water heater, and the outlet water temperature sensor detects the water temperature leaving the combustion heat exchange system. In this way, it is judged whether the water passing through the combustion heat exchange system of the water heater needs to be antifreeze treated through internal circulation.

[0027] Preferably, the water heater antifreeze system includes a flow sensor, and the flow sensor is arranged on a water pipe of the water heater.

[0028] In this solution, the above-mentioned structural form is adopted, so that the flow sensor can monitor the flow of water in the water heater pipe, detect whether there is liquid passing through the internal circulation of the water heater, and ensure that the internal circulation is working normally.

[0029] A control method for a water heater antifreeze system, the control method comprising the following steps:

[0030] S1, the signal receiving unit of the water solenoid valve receives a working signal to open the valve and start the circulating water pump at the same time;

[0031] S2, the electric heating block is powered on and heated.

[0032] In this solution, the above method is adopted to open the water solenoid valve, form a new passage, and realize the internal circulation of water. The water passing through the new passage is heated by the electric heating block, and the water is circulated inside the water heater under the action of the circulating water pump. The circulation of the water after the temperature rises ensures that the inside of the water heater does not freeze.

[0033] Preferably, the water heater antifreeze system includes a temperature sensor, and before step S1, it also includes:

[0034] S01, setting the temperature sensor to send a start signal to the signal receiving unit when the temperature is less than or equal to the start temperature;

[0035] In this solution, the above method is adopted to realize that the water heater antifreeze system is set with an operating temperature. When the temperature sensor detects that the water temperature circulating in the water heater is less than or equal to the set temperature, the water heater is at risk of freezing and needs to be antifreeze. The water heater antifreeze system is started by controlling the switch of the water solenoid valve through the temperature sensor.

[0036] Preferably, the water heater antifreeze system includes a flow sensor, and before step S2, it also includes:

[0037] S12, the flow sensor detects the flow in the pipeline, and if no fluid passes through the water heater antifreeze system stops working.

[0038] In this solution, the above method is adopted to detect the internal circulation of the water heater by the flow sensor. When there is no water flowing in the water heater circulation pipe, the water heater has no freezing risk and cannot perform antifreeze work. Stop the water heater antifreeze system.

[0039] Preferably, after step S2, the following steps are further included:

[0040] S5, the water inlet temperature sensor and the water outlet temperature sensor detect the water temperature, and when the water temperature is greater than or equal to 20 degrees Celsius, the water heater antifreeze system stops working;

[0041] In this solution, the above method can be used to ensure that when the temperature of the internal circulation of the water heater reaches 20 degrees Celsius, there is no risk of the water heater freezing, and the water heater antifreeze system does not need to work to protect the water heater from freezing.

[0042] Preferably, after step S2, the following steps are further included:

[0043] S6. The water inlet temperature sensor and the water outlet temperature sensor detect the water temperature. When the water temperature is less than 2 degrees Celsius, the water heater starts to burn and the combustion heat exchanger system starts.

[0044] S7. The water inlet temperature sensor and the water outlet temperature sensor detect the water temperature. When the water temperature is less than or equal to 0 degrees Celsius, the water heater antifreeze system is shut down and a freezing alarm is issued.

[0045] In this solution, the above method can be used to achieve that when the outside temperature is too low, the electric heating block set in the heat exchange chamber is not enough to achieve sufficient heating of the internal circulation of the water heater. The combustion heat exchange system of the water heater will work, so that the water temperature inside the water heater will rise. The energy generated by the combustion heat exchanger can meet the increase in water temperature and avoid the water heater from freezing due to the low outside temperature. When the temperature in the temperature sensor detection tube is less than or equal to 0 degrees Celsius, it has reached the freezing point of water, and the water heater is at risk of freezing and an alarm needs to be issued.

[0046] The positive and progressive effect of the present invention is that: by adopting the above-mentioned structural form, by adding a connecting pipe assembly in the water heater, the water heater can achieve internal circulation based on the passage added by the connecting pipe assembly. Furthermore, a water solenoid valve is provided to control the switch of the passage, and the water solenoid valve opens and closes the passage according to work requirements. Only a small number of heating blocks need to be arranged in the water heater to achieve hot water circulation inside the water heater, meet the antifreeze requirements of the water heater, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic structural diagram of a water heater according to an embodiment of the present invention.

[0048] Figure 2 It is a schematic structural diagram of a connecting pipe assembly according to an embodiment of the present invention.

[0049] Figure 3 4 is a cross-sectional view of a connecting pipe assembly according to an embodiment of the present invention.

[0050] Figure 4 The present invention is a flow chart of a control method of a water heater antifreeze system according to an embodiment of the present invention.

[0051] Description of reference numerals:

[0052] Connecting pipe assembly 1

[0053] Heat exchange chamber 11

[0054] Sealing ring 111

[0055] Electric heating block 112

[0056] Pipeline body 12

[0057] Pressure relief valve 13

[0058] Mounting slot 102

[0059] Heat Sink 101

[0060] Pressure relief valve mounting seat 103

[0061] Water solenoid valve 2

[0062] Water outlet 3

[0063] Outlet pipe 31

[0064] Outlet water temperature sensor 311

[0065] Water inlet 4

[0066] Water inlet pipe 41

[0067] Inlet water temperature sensor 411

[0068] Circulating water pump 5

[0069] Flow sensor 6 DETAILED DESCRIPTION

[0070] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0071] like Figure 1 As shown, a water heater antifreeze system includes an electric heating block 112, a water solenoid valve 2, a circulating water pump 5 and a connecting pipe assembly 1; the connecting pipe assembly 1 includes a first interface, a pipe body 12 and a second interface, the first interface is connected to the water outlet interface 3 of the water heater, and the second interface is connected to the water inlet interface 4 of the water heater; the water solenoid valve 2 is arranged on the pipe body 12, and the circulating water pump 5 is arranged on the water pipeline of the water heater.

[0072] like Figure 2As shown, in this embodiment, it is possible to add a connecting pipe assembly 1 to the water heater, and add a passage through the connecting pipe assembly 1, so that the water heater can achieve internal circulation. In this embodiment, the connecting pipe assembly 1 is installed at the bottom of the water heater. In other embodiments, the connecting pipe assembly 1 can also be set at other parts of the water heater. By adding pipelines at the water inlet and outlet of the water heater, the water heater has a pipeline that can meet the internal circulation, and the connecting pipe assembly 1 can be placed at any position on the internal circulation pipeline of the water heater. A water solenoid valve 2 is set to control the switch of the passage. The water solenoid valve 2 opens and closes the passage according to the working requirements, and realizes the circulation of hot water inside the water heater through the single arrangement of the electric heating block 112 of the water heater, thereby performing the antifreeze operation for the water heater. In this embodiment, the electric heating block 112 is arranged on the connecting pipe assembly 1. In other embodiments, the electric heating block 112 can be set at any position on the water pipeline circulating in the water heater. The water circuit circulating in the water heater is heated by the electric heating block 112, so that there is flowing water in the internal pipeline of the water heater to achieve antifreeze.

[0073] like Figure 2 As shown, the connecting pipe assembly 1 includes a heat exchange cavity 11, and the heat exchange cavity 11 is arranged on the pipe body 12. The electric heating block 112 is located in the heat exchange cavity 11.

[0074] In this embodiment, the heat exchange chamber 11 can be arranged on the pipe body 12 of the connecting pipe assembly 1, so that when the water circulates inside the water heater, the water passes through the heat exchange chamber 11. The electric heating block 112 inside the heat exchange chamber 11 works to exchange heat with the water flowing through the heat exchange chamber 11, thereby increasing the water temperature of the internal circulation pipeline. The water with the increased temperature circulates internally to achieve antifreeze for the internal pipeline of the water heater. The setting of the heat exchange chamber 11 makes the heat exchange between water and the electric heating block 112 more direct, thereby improving the water heating effect. When the surface of the pipeline freezes, the electric heating block 112 arranged in the heat exchange chamber 11 can also exchange heat with the water pipeline of the water heater without being affected by the freezing of the pipeline.

[0075] In other embodiments, the electric heating block 112 may also be arranged on the pipe surface of the circulation pipeline in the water heater, and the circulation pipeline in the water heater may be heated through heat exchange between the electric heating block 112 and the pipeline to meet the antifreeze requirement of the water heater.

[0076] The connecting pipe assembly 1 comprises a pressure relief valve 13, and an opening of the pressure relief valve 13 is arranged along the gravity direction.

[0077] In this solution, the above-mentioned structural form is adopted, so that the pressure relief valve 13 can release pressure and drain water when circulating in the pipeline. When the pressure in the internal circulation pipeline increases due to the external temperature difference, the pressure relief valve 13 can discharge the liquid and gas in the internal circulation of the water heater so that the air pressure in the internal circulation pipe is balanced with the outside. Avoid the rupture of the pipeline due to the pressure difference in the pipe. When the water heater is not used for a long time and the water in the pipeline needs to be discharged, the pressure relief valve 13 can simultaneously discharge the water in the internal circulation pipeline of the water heater. The opening of the pressure relief valve 13 is arranged along the direction of gravity, so that when the pressure relief valve 13 is opened, the water can be discharged smoothly under the action of gravity.

[0078] In other embodiments, the pressure relief valve 13 can be disposed at any position on the pipeline circulating in the water heater.

[0079] like Figure 3 As shown, the connecting pipe assembly 1 includes a mounting groove 102 and a heat sink 101; the electric heating block 112 is installed in the mounting groove 102, the mounting groove 102 is arranged in the heat exchange cavity 11, the mounting groove 102 and the heat exchange cavity 11 are hollow, and the heat sink 101 is evenly distributed on the outer wall of the mounting groove 102.

[0080] In this embodiment, when the internal circulation of the water heater is turned on, water passes through the inside of the connecting pipe assembly 1, and the water is in direct contact with the mounting groove 102, so that the electric heating block 112 can transfer heat energy from the inside of the pipeline to the water through heat transfer. When the water heater needs to be antifreeze, the external ambient temperature is low. When the electric heating block 112 performs heat exchange from the inside of the pipeline, it can save energy for heat exchange and avoid wasting heat energy due to the ambient temperature. The uniform distribution of the heat sink 101 can make the electric heating block 112 transfer heat more evenly to the heat sink 101 distributed on the outer wall of the mounting groove 102. The uniformly distributed heat sink 101 can make the temperature of the water passing through uniformly rise, so that the heat transfer effect is better. The hollow space between the mounting groove 102 and the heat exchange cavity 11 can make the electric heating block 112 more fully exchange heat with the water, so that the water can be heated up.

[0081] In other embodiments, the outer wall of the installation groove 102 may not be provided with the heat sink 101. The heat exchange with the water inside the connecting pipe assembly 1 is directly performed through the installation groove 102.

[0082] like Figure 3 As shown, the heat exchange chamber 11 includes a pressure relief valve mounting seat 103 , which is disposed at the bottom of the heat exchange chamber 11 , and the pressure relief valve 13 is connected to the pressure relief valve mounting seat 103 .

[0083] In this embodiment, the bottom of the heat exchange chamber 11 is provided with a pressure relief valve mounting seat 103, which facilitates the installation and connection of the pressure relief valve 13, so that the installation position of the pressure relief valve 13 will not be seriously offset. By providing the pressure relief valve mounting seat 103 on the heat exchange chamber 11, the pressure relief valve 13 and the electric heating block 112 can be located at the same position, and when the electric heating block 112 is working, the pressure relief valve 13 will not be affected by the environment and will not freeze. The pressure relief valve 13 can maintain a good working environment.

[0084] In other embodiments, the pressure relief valve 13 can even be located at other positions of the water pipe of the water heater. Being arranged at the bottom of the water heater in this embodiment can achieve a better drainage effect.

[0085] The water solenoid valve 2 comprises a signal receiving component and a valve.

[0086] In this embodiment, the water solenoid valve 2 can receive the signal sent by the temperature sensor through the signal receiving component to determine whether the water heater antifreeze system needs to be started. When the water heater antifreeze system needs to be turned on, the signal receiving component performs a check-in control on the valve so that water can enter the additional passage to achieve internal circulation. When the internal circulation pipeline of the water heater works normally, the temperature sensor sends a closing signal to the signal receiving component. The signal receiving component sends a signal to close the valve, so that the water heater antifreeze system is closed.

[0087] A sealing ring 111 is provided at the connection between the pressure relief valve mounting seat 103 and the pressure relief valve 13 .

[0088] In this solution, the above-mentioned structural form is adopted to achieve a tight connection between the pressure relief valve 13 and the heat exchange chamber 11, and to achieve a leak-proof guarantee between the pressure relief valve 13 and the heat exchange chamber 11 through the sealing ring 111. The pressure relief valve 13 needs to be kept closed when not working. When the water heater antifreeze system is working, water passes through the pressure relief valve 13, and the sealing ring 111 can further guarantee the operation of the water heater antifreeze system.

[0089] The circulating water pump 5 is arranged on the water inlet pipe of the water heater.

[0090] In this embodiment, when circulation antifreeze is required, the water in the water inlet pipe of the water heater has more water than other pipes. The circulating water pump 5 acts on the water inlet pipe of the water heater to allow water to flow quickly, so that the water heater antifreeze system obtains enough flowing water to meet the internal circulation. When the water in the pipe is heated by the circulating water pump, the water can be antifreezed by the heat exchange system after being heated.

[0091] In other embodiments, if the water heater is a zero-cold-water water heater, a circulating water pump inside the zero-cold-water water heater may also be used to achieve the same internal circulation effect.

[0092] The water heater antifreeze system includes a temperature sensor, which is arranged on the water pipe of the water heater.

[0093] In this embodiment, the temperature sensor can be installed on the pipeline of the water heater to detect the temperature of the water inside the water heater pipeline. When the water temperature reaches the start temperature set by the temperature sensor, the water heater is at risk of freezing. The temperature sensor sends a start signal to the water solenoid valve 2, and the internal circulation pipeline is connected by opening the valve of the water solenoid valve 2, so that the water heater antifreeze system can work. The temperature sensor can be set at any position on the water pipeline of the water heater.

[0094] The temperature sensor includes an inlet water temperature sensor 411 and an outlet water temperature sensor 311 .

[0095] In this embodiment, at least two temperature sensors can be implemented, namely, an inlet temperature sensor 411 and an outlet temperature sensor 311. The inlet temperature sensor 411 detects the water temperature entering the combustion heat exchange system of the water heater, and the outlet temperature sensor 311 detects the water temperature leaving the combustion heat exchange system. In this way, it is judged whether the water passing through the combustion heat exchange system of the water heater needs to be antifreeze treated through internal circulation. When the water heater is not working, residual water remains inside the combustion heat exchange system. The water level remaining in the combustion heat exchange system is the main reason for the freezing of the water heater. The temperature of both ends of the combustion heat exchange system is detected. The judgment of the switch of the water heater antifreeze system by the temperature sensors at both ends of the combustion heat exchanger can further improve the working efficiency of the water heater antifreeze system. Ensure that the water heater antifreeze system performs effective antifreeze work.

[0096] In other implementations, the number of temperature sensors distributed at the water inlet and the water outlet of the combustion heat exchange system is not limited to one each, but may be multiple.

[0097] The water heater antifreeze system comprises a flow sensor 6, which is arranged on the water pipe of the water heater.

[0098] In this embodiment, the flow sensor 6 can monitor the flow of water in the water heater pipe and detect whether there is liquid passing through the inner circulation of the water heater. The water heater antifreeze system relies on the water circulation inside the water heater to achieve antifreeze. When there is no flowing water in the inner circulation pipeline of the water heater, the water heater antifreeze system cannot work normally. The flow sensor 6 can ensure that the inner circulation is working normally.

[0099] like Figure 4 As shown, a control method for a water heater antifreeze system, the control method comprises the following steps:

[0100] S1, the signal receiving part of the water solenoid valve 2 receives the working signal to open the valve and start the circulating water pump 5 at the same time;

[0101] S2, the electric heating block 112 is powered on and heated.

[0102] In this embodiment, the water solenoid valve 2 can be opened to form a new passage so as to realize the internal circulation of water inside the water heater. The water passing through the new passage is heated by the electric heating block 112. The water in the water heater pipe is circulated inside the water heater under the action of the circulating water pump 5. The circulating water passes through the main antifreeze part of the water heater, and the circulation of the water after the temperature rises ensures the internal circulation of the water heater, and the freezing of the pipe does not occur. The water heater is made to meet the antifreeze effect by maintaining the circulation of hot water in the circulation pipeline inside the water heater.

[0103] The water heater antifreeze system includes a temperature sensor, and before step S1, further includes:

[0104] S01, setting the temperature sensor to send a start signal to the signal receiving unit when the temperature is less than or equal to the start temperature;

[0105] In this embodiment, it is possible to set the working temperature of the water heater antifreeze system. When the temperature sensor detects that the water temperature circulating in the water heater is less than or equal to the set temperature, the water heater is at risk of freezing and needs to be antifreeze. The water solenoid valve is switched on and off by the temperature sensor to start the water heater antifreeze system. In this embodiment, the set temperature set for the temperature sensor can be set to 5 set degrees. When the water temperature reaches 5 degrees Celsius or below, the water heater pipeline is at risk of freezing, and the electric heating block 112 can effectively heat the water circulating in the pipeline at a temperature of 5 degrees Celsius.

[0106] In other embodiments, the set temperature may also be set to other values ​​under the condition that the electric heating block is heated in time.

[0107] The water heater antifreeze system includes a flow sensor 6, and before step S2, further includes:

[0108] S12, the flow sensor 6 detects the flow in the pipeline. If no fluid passes through, the water heater antifreeze system stops working.

[0109] In this embodiment, the flow sensor 6 can detect the internal circulation of the water heater. When the flow sensor 6 detects that there is no water flowing in the water heater circulation pipeline, the water heater has no risk of freezing and cannot perform antifreeze work. If there is no residual water inside the water heater, the internal pipeline of the water heater will not freeze due to the overcooling environment, and the pipeline will not rupture due to the increase in volume after freezing into ice. Energy is saved by stopping the water heater antifreeze system.

[0110] After step S2, the following steps are also included:

[0111] S5, the water inlet temperature sensor 411 and the water outlet temperature sensor 311 detect the water temperature, and when the water temperature is greater than or equal to 20 degrees Celsius, the water heater antifreeze system stops working;

[0112] In this embodiment, when the temperature of the water heater internal circulation reaches 20 degrees Celsius, there is no risk of freezing of the water heater, and the water heater antifreeze system does not need to work to protect the water heater from freezing. 20 degrees Celsius is far from the freezing temperature of water, and when the temperature inside the water heater reaches 20 degrees Celsius or above, the pipes inside the water heater will not freeze.

[0113] After step S2, the following steps are also included:

[0114] S6. The water inlet temperature sensor 411 and the water outlet temperature sensor 311 detect the water temperature. When the water temperature is less than 2 degrees Celsius, the water heater starts to burn and the combustion heat exchanger system starts.

[0115] S7. The water inlet temperature sensor 411 and the water outlet temperature sensor 311 detect the water temperature. When the water temperature is less than or equal to 0 degrees Celsius, the water heater antifreeze system is shut down and a freezing alarm is issued.

[0116] In this embodiment, it can be achieved that when the outside temperature is too low, the electric heating block 112 arranged in the heat exchange chamber 11 is not enough to achieve sufficient heating for the internal circulation of the water heater. The combustion heat exchange system of the water heater will work, so that the water temperature inside the water heater will rise. The energy generated by the combustion heat exchanger can meet the increase in water temperature, thereby avoiding the freezing of the water heater due to the low outside temperature. When the combustion system of the water heater is working, water will pass through the combustion heat exchange system, and the combustion heat exchange system will exchange heat with the internal water to achieve the function of the water heater. The combustion heat exchange system of the water heater is on the bi-passage of the circulation pipeline in the water heater. When the temperature sensor detects that the temperature in the tube is less than or equal to 0 degrees Celsius, it has reached the freezing point of water. The water inside the water heater pipeline will freeze due to the freezing point of water, causing the water heater pipeline to freeze. The risk of freezing of the water heater requires an alarm.

[0117] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A water heater antifreeze system, comprising an electric heating block, characterized in that: It includes a water solenoid valve, a circulating water pump and a connecting pipe assembly; The connecting pipe assembly includes a first interface, a pipe body, a second interface, a heat exchange cavity, a pressure relief valve, a mounting groove and a heat sink, the first interface is connected to the water outlet interface of the water heater, the second interface is connected to the water inlet interface of the water heater, the heat exchange cavity is arranged on the pipe body, the electric heating block is located in the heat exchange cavity, the electric heating block is installed in the mounting groove, the mounting groove is arranged in the heat exchange cavity, the mounting groove and the heat exchange cavity are hollow, the heat sink is evenly distributed on the outer wall of the mounting groove, the opening of the pressure relief valve is arranged along the gravity direction, the heat exchange cavity includes a pressure relief valve mounting seat, the pressure relief valve mounting seat is arranged at the bottom of the heat exchange cavity, and the pressure relief valve is connected to the pressure relief valve mounting seat; The water solenoid valve is arranged on the pipeline body, and the circulating water pump is arranged on the water pipeline of the water heater.

2. The water heater antifreeze system according to claim 1, characterized in that: The water solenoid valve comprises a signal receiving component and a valve.

3. The water heater antifreeze system according to claim 1, characterized in that: A sealing ring is provided at the connection between the pressure relief valve mounting seat and the pressure relief valve.

4. The water heater antifreeze system according to claim 1, characterized in that: The circulating water pump is arranged on the water inlet pipe of the water heater.

5. The water heater antifreeze system according to claim 1, characterized in that: The water heater antifreeze system comprises a temperature sensor, and the temperature sensor is arranged on the water pipeline of the water heater.

6. The water heater antifreeze system according to claim 5, characterized in that: The temperature sensor includes a water inlet temperature sensor and a water outlet temperature sensor.

7. The water heater antifreeze system according to claim 1, characterized in that: The water heater antifreeze system comprises a flow sensor, and the flow sensor is arranged on the water pipe of the water heater.

8. A control method for a water heater antifreeze system according to any one of claims 1 to 7, characterized in that: The control method comprises the following steps: S1, the signal receiving unit of the water solenoid valve receives a working signal to open the valve and start the circulating water pump at the same time; S2, the electric heating block is powered on and heated.

9. The control method of the water heater antifreeze system according to claim 8, characterized in that: The water heater antifreeze system includes a temperature sensor, and before step S1, further includes: S01. Setting the temperature sensor to send a start signal to the signal receiving unit when the temperature is less than or equal to the start temperature.

10. The control method of the water heater antifreeze system according to claim 8, characterized in that: The water heater antifreeze system includes a flow sensor, and before step S2, further includes: S12, the flow sensor detects the flow in the pipeline, and if no fluid passes through the water heater antifreeze system stops working.

11. The control method of the water heater antifreeze system according to claim 9, characterized in that: The temperature sensor includes an outlet water temperature sensor and an inlet water temperature sensor, and after step S2, the following steps are further included: S5. The water inlet temperature sensor and the water outlet temperature sensor detect the water temperature. When the water temperature is greater than or equal to 20 degrees Celsius, the water heater antifreeze system stops working.

12. The control method of the water heater antifreeze system according to claim 9, characterized in that: The temperature sensor includes an outlet water temperature sensor and an inlet water temperature sensor, and after step S2, the following steps are further included: S6, the water inlet temperature sensor and the water outlet temperature sensor detect the water temperature. When the water temperature is less than 2 degrees Celsius, the water heater starts to burn, and the combustion heat exchanger system starts; S7. The water inlet temperature sensor and the water outlet temperature sensor detect the water temperature. When the water temperature is less than or equal to 0 degrees Celsius, the water heater antifreeze system is shut down and a freezing alarm is issued.

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