Constant-temperature pre-instant-heating container-in-container electric water heater

Abstract

The invention provides a constant-temperature pre-instant-heating container-in-container electric water heater. The electric water heater comprises a water storage inner container and a preheating electric heating tube, wherein an inner container water inlet joint and an inner container water outlet joint are arranged on the water storage inner container, the preheating electric heating tube is arranged in the water storage inner container; and particularly, the electric water heater further comprises an instant heating device and a water mixing valve, wherein the instant heating device comprises an instant heating inner container and an instant heating electric heating pipe, instant heating electric heating pipe is arranged in the instant heating inner container, an instant heating waterinlet pipe and an instant heating water outlet pipe are arranged on the instant heating inner container, the instant heating device is arranged in the water storage inner container, the electrode endof the instant heating electric heating pipe, the instant heating water inlet pipe and the instant heating water outlet pipe penetrate out of the water storage inner container, the water mixing valvecomprises a valve body and a valve element, a water mixing cavity is formed in the valve body, the valve element is arranged in the water mixing cavity, the valve body is provided with a water mixingwater inlet connector, a preheating water inlet connector and a water mixing water outlet connector which communicating with the water mixing cavity, the preheating water inlet connector communicateswith the inner container water outlet connector, and the water mixing water outlet connector communicates with the instant heating water inlet pipe. The electric water heater has the characteristics of high-efficiency, stable and reliable hot water output and good use effect.

Description

technical field [0001] The invention relates to an electric water heater, in particular to a dual-mode electric water heater with preheating and instant heating functions. Background technique [0002] Existing electric water heaters are generally divided into three categories: water storage type, instant heating type and pre-instant heating type according to the heating method. Among them, the water storage type electric water heater is easy to install and has a simple structure, which is very suitable for ordinary households. However, it has the disadvantage of long heating time. It needs to be turned on and heated for a period of time before it can be used. It is obviously reduced, and it needs to wait for reheating before it can be used again, which has the disadvantage of inconvenient use. The instant electric water heater is easy to use, can quickly output hot water, and can be used immediately when it is turned on, but its operating power is relatively high, limited ...

AI Technical Summary

Problems solved by technology

Among them, the water storage type electric water heater is easy to install and has a simple structure, which is very suitable for ordinary households. However, it has the disadvantage of long heating time. It needs to be turned on and heated for a period of time before it can be used. Significantly lower, you need to wait for reheating before you can use it again, which has the disadvantage of being inconvenient to use

The instant electric water heater is easy to use, can quickly output hot water, and is ready to use, but its operating power is relatively high, limited by the existing circuit, and has the disadvantage of limited installation

The preheating electric water heater has both a water storage preheating mode and an instant heating mode. Users can choose the heating mode to output moderate water according to their needs. It is easy to install and use, but the technology of this type of water heater is still immature. , 1. That is, the heater is installed outside the preheater, resulting in the overall structure of the electric water heater shell is not compact, takes up a lot of space, the shape of the water heater is poor, and it is very unsightly; 2. The existing working mode of this type of water heater is: preheating The preheating electric heating tube in the heating tank first preheats the water in the tank to 70-80°C. When the user uses it, the preheating water in the preheating tank enters the instant heating tank, and the thermoelectric heating tube is the preheated water in the heating tank according to the input. The heating power is controlled by the water temperature, and the water temperature is quickly heated to 90-100°C and then output for the user to use

There are serious deficiencies in this mode of operation: 1. Due to the high temperature of the water entering the instant heating tank, the instant heating electric heating tube usually works with a low power to avoid high-power work causing the water body in the instant heating tank to vaporize and dry-burn, although this reduces the The working energy consumption of the instant thermoelectric heating tube reduces energy waste, but due to the low power operation of the instant thermoelectric heating tube, the output hot water is mainly provided by the preheating electric heating tube in the preheating tank, and the large output of preheating water eventually causes preheating The temperature of the preheated water in the heater is very low. Even if the thermoelectric heating tube works with high power or even full power, it is difficult to quickly increase the temperature of the preheated water, which will eventually cause the output temperature of the electric water heater to be low and unstable, seriously affecting the use effect; 2 , That is, the thermoelectric heating tube is heated at a high temperature for a long time, which is easy to scale and reduces the heating efficiency and service life of the heating tube

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