Integrated type anti-freeze and pressure relief valve

Abstract

The invention discloses an integrated type anti-freeze and pressure relief valve. The integrated type anti-freeze and pressure relief valve comprises a valve body 1. The valve body 1 is internally provided with a water channel 2 allowing water to flow through. An anti-freeze assembly which can block the water channel 2 is arranged on the valve body 1, and when the environment temperature is lower than the set temperature, the anti-freeze assembly automatically opens the water channel 2 to conduct water draining. Before the temperature of a water route system of a water heater reaches the critical crystallization temperature, the water route system is made in a flow state through the integrated type anti-freeze and pressure relief valve; and after a water route absorbs enough heat energy carried by flowing water and friction heat produced by relative flow, the water route system can be above a critical crystallization temperature point all the time, and freezing and frost cracking of the water route system can be prevented. The valve body 1 is further provided with a pressure relief device which can block the water channel 2, when the water pressure of the water route is higher than the set value, the pressure relief device automatically opens the water channel 2 to conduct water draining and pressure reduction, and thus, the anti-freeze and pressure relief functions are achieved at the same time; and the integrated type anti-freeze and pressure relief valve is simple in structure, safe, reliable and convenient for households to install and use.

Description

[0001] 【Technical field】 [0002] The invention relates to an accessory for a water heater, in particular to an integrated antifreeze pressure relief valve. [0003] 【Background technique】 [0004] In most parts of northern my country, the temperature in winter is generally lower than 0°C. When the gas water heater is not working and the water system is filled with cold water, if the whole machine is installed on a cold balcony or the outside cold wind flows through the exhaust pipe to form a backflow, it will cause the internal temperature of the water heater to drop suddenly, and the pipes will easily crack and leak. . There are three types of antifreeze measures commonly used at this stage: [0005] One is to use a safety valve, that is, to empty the water heater water system when not in use. This method can effectively prevent freezing, but it is easy to crack the pipeline due to user forgetting; [0006] The second is to use electric heating components, which can sense ...

AI Technical Summary

Problems solved by technology

[0005] One is to use a safety valve, that is, to empty the water heater water system when not in use. This method can effectively prevent freezing, but it is easy to crack the pipeline due to user forgetting;

[0006] The second is to use electric heating components, which can sense the temperature of the waterway through the thermostat. When it is lower than the closing point temperature, the heating component will heat the waterway system more comprehensively and rapidly. This method has a better antifreeze effect and is also the mainstream antifreeze at this stage. However, the power of this module is generally about 90W, and the power consumption of long-term work is relatively large. Calculated based on the 8-year service life, the operating cost of electric auxiliary heating is about 600 yuan, which is high in cost and there is a hidden danger of power failure;

[0007] The third is to add an anti-fall air pipe, that is, add an anti-fall air pipe assembly between the smoke exhaust pipe and the water heater, and use a one-way valve to ensure that the flue gas is discharged smoothly and the outside cold wind cannot enter the water heater through the smoke pipe. This method has been used in the prior art. It is relatively mature and can significantly reduce the occurrence of water heater cracking accidents. However, this method is only to prevent the cold wind from pouring back, and has no obvious effect on the situation where the water heater is installed on a cold balcony. Therefore, this method is generally used in combination with the previous two

[0008] The existing technical solutions may have reliability problems or high costs, and the actual use effect is not completely satisfactory

At the same time, because the antifreeze module and the pressure relief module are two independent parts, which are produced and installed separately, the interface design of the two parts should also be considered in the design of the whole machine, which will cost more

Images