Water circulating hot-water bag for water pump heat exchange type hand warmer

Abstract

The invention discloses a water circulating hot-water bag for a water pump heat exchange type hand warmer, which comprises a bag body. The water circulating hot-water bag is characterized in that the bag body is provided with a water circulating inlet and a water circulating outlet which are communicated with a water pump, and both the water circulating inlet and the water circulating outlet are provided with check valves. The water circulating inlet and the water circulating outlet which are used for being connected with an external heat exchanger are arranged on the bag body of the water circulating hot-water bag, the water pump on the heat exchanger pumps out liquid in a bag cavity via the water circulating outlet, after rapidly absorbing heat via the heat exchanger, the liquid is injected into the bag cavity again via the water circulating inlet, so that the liquid in the hot-water bag circularly flows and realizes heat exchange between the bag cavity and the heat exchanger, heating of the bag body is realized for warming, any electric heaters in the bag body of the hot-water bag are omitted, the structure of the water circulating hot-water bag is simplified, furthermore, the service life of the hot-water bag is prolonged, the safety of the hot-water bag is increased, the hot-water bag rapidly heats, and heating speed is increased effectively.

Description

technical field [0001] The invention relates to the technical field of hand warmers, in particular to a water circulation warm water bag for a water pump heat exchange type hand warmer. Background technique [0002] The existing hand warmer, namely: electric heating bag, its structure includes a bag body, a bag cavity is arranged in the bag body, liquid is stored in the bag cavity, and the electric heating body is placed in the liquid, that is, the electric heating body is built in the bag cavity , in order to directly heat the liquid in the bag cavity. When the electric heating bag is heating, when the liquid is heated to the set temperature value, the thermostat will act, disconnect the power supply of the electric heating body, and make the electric heating body stop working. At this time, the hand warmer can be used for heating. [0003] However, the above-mentioned traditional hand warmer with built-in electric heating body still has the following disadvantages: (1) In...

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Problems solved by technology

[0003] However, the above-mentioned traditional hand warmer with built-in electric heating body still has the following disadvantages: (1) In view of the fact that the electric heating body is built in the bag cavity, when the liquid is heated, gas will be generated to make the bag cavity continuously expand. In order to prevent the bag cavity ( gas) overpressure burst, the traditional hand warmer will add an explosion-proof mechanism on the bag body, such as: install a thermostat on the surface of the electric heating body, or add an overpressure exhaust valve on the bag wall; however, If the above-mentioned explosion-proof mechanisms are damaged, such as: the thermostat fails, the exhaust valve is blocked, etc., the wall of the hand warmer bag under heating will burst due to overpressure, and high-temperature liquid will splash out. Therefore, the built-in electric The hand warmer with heating body always has a big safety hazard; (2) The hand warmer with built-in electric heating body is often unusable due to damage to the explosion-proof mechanism, thus shortening the service life of the product; (3) Since the electric heating body is built into the hand warmer, the electric heating body cannot be disassembled, and it is impossible to realize that one electric heating body can heat multiple bags; (4) The electric heating body in the bag cavity of the hand warmer requires Immersed in the liquid, that is: the liquid should not be too small, otherwise, it will easily cause dry burning. Of course, the liquid in the bag cavity will not pass too much. Therefore, the user will have certain technical requirements for the water injection of the hand warmer; (5) In view of the electric The heating body is set inside the bag, which limits the use of instant heaters (such as: glass tube heaters) as electric heating bodies, resulting in slower heating of the hand warmer

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