1. Introduction
1.1 History
The lunchboxes which were available earlier were not useful for kids. In 1800s, workers carry metal buckets to store food while going to workplace. In fact, your lunch pail illustrated your place on the economic scale -- a lunch pail meant you couldn't afford a hot noontime meal. This didn't stop children from wanting to emulate their working parents, however Later, kids fashioned their own lunch buckets from tin boxes that were originally used to hold cookies or tobacco. Early mass-produced lunch buckets for children resembled picnic baskets and featured illustrations of kids playing.
With increase in industrialization, number of industrial worker also increases. It became necessary to use such a device which …show more content…
Everyone – from women in brightly colored saris working in the fields to giggling families on long train journeys – carries a tiffin to provide a compact, portable, homemade lunch.
Figure 1 History and Development of Tiffin Box
1.2 Problem Summary The problem in latest tiffin box available in market is that it can only heat the food. The food that require the cooling cannot be stored in this tiffin box. So different storage box is requiring to store the food like milk, buttermilk, curd, etc. If we want to store both type of food in single lunch box, we need some circuit that can produce both heating and cooling effect. The disadvantage of using this additional circuit is as following:
1. Increase in overall cost
2. Increase in total weight
3. More input power required
1.3 Aim and Objective
Aim: To install a circuit in tiffin box that produce heating and cooling effect simultaneously.
Objective: The followings are the objectives of the study.
1. To store the food for long …show more content…
While no cooling method is ideal in all respects and the use of thermoelectric modules will not be suitable for every application, TE coolers will often provide substantial advantages over alternative technologies. Some of the more significant features of thermoelectric modules include:
No Moving Parts: A TE module works electrically without any moving parts so they are virtually maintenance free.
Small Size and Weight: The overall thermoelectric cooling system is much smaller and lighter than a comparable mechanical system. A variety of standard and special sizes and configurations are available to meet strict application requirements.
Ability to Cool Below Ambient: Unlike a conventional heat sink whose temperature necessarily must rise above ambient, a TE cooler attached to that same heat sink has the ability to reduce the temperature below the ambient value.
Ability to Heat and Cool with the Same module: Thermoelectric coolers will either heat or cool depending upon the polarity of the applied DC
1.1 History
The lunchboxes which were available earlier were not useful for kids. In 1800s, workers carry metal buckets to store food while going to workplace. In fact, your lunch pail illustrated your place on the economic scale -- a lunch pail meant you couldn't afford a hot noontime meal. This didn't stop children from wanting to emulate their working parents, however Later, kids fashioned their own lunch buckets from tin boxes that were originally used to hold cookies or tobacco. Early mass-produced lunch buckets for children resembled picnic baskets and featured illustrations of kids playing.
With increase in industrialization, number of industrial worker also increases. It became necessary to use such a device which …show more content…
Everyone – from women in brightly colored saris working in the fields to giggling families on long train journeys – carries a tiffin to provide a compact, portable, homemade lunch.
Figure 1 History and Development of Tiffin Box
1.2 Problem Summary The problem in latest tiffin box available in market is that it can only heat the food. The food that require the cooling cannot be stored in this tiffin box. So different storage box is requiring to store the food like milk, buttermilk, curd, etc. If we want to store both type of food in single lunch box, we need some circuit that can produce both heating and cooling effect. The disadvantage of using this additional circuit is as following:
1. Increase in overall cost
2. Increase in total weight
3. More input power required
1.3 Aim and Objective
Aim: To install a circuit in tiffin box that produce heating and cooling effect simultaneously.
Objective: The followings are the objectives of the study.
1. To store the food for long …show more content…
While no cooling method is ideal in all respects and the use of thermoelectric modules will not be suitable for every application, TE coolers will often provide substantial advantages over alternative technologies. Some of the more significant features of thermoelectric modules include:
No Moving Parts: A TE module works electrically without any moving parts so they are virtually maintenance free.
Small Size and Weight: The overall thermoelectric cooling system is much smaller and lighter than a comparable mechanical system. A variety of standard and special sizes and configurations are available to meet strict application requirements.
Ability to Cool Below Ambient: Unlike a conventional heat sink whose temperature necessarily must rise above ambient, a TE cooler attached to that same heat sink has the ability to reduce the temperature below the ambient value.
Ability to Heat and Cool with the Same module: Thermoelectric coolers will either heat or cool depending upon the polarity of the applied DC