Title of Invention


Abstract An Air-Conditioned Bed fitted with insulated enclosure, air-conditioner, inverter and doors having transparent window makes it a comfortable place for taking rest. In this device low power air-conditioner is required, therefore electricity consumption is very low. This also saves money incurred in buying powerful air-conditioner. The invented bed maintains constant temperature efficiently and economically. This is cost effective even for those who face frequent power supply failure. The insulated enclosure holds the key of solution to the problem of maintaining constant temperature at the place of taking rest.
The present invention relates to air-conditioning the enclosed place for taking rest. Confining the cool air in the desired area was the objective. This invention relates to saving the electricity by cooling only the desired area. In particular, this invention is also related to solving the problems like, humidity, noise pollution, mosquitoes and interrupted power supply while taking rest. Besides, the invention also requires lower power compressors for cooling the desired place that eventually save lots of power and thus makes air-conditioning affordable even for a common man.
The common practice of air-conditioning requires a lots of electricity consumption because it requires air-conditioning of the whole room. From the point of view of affordability the consumption of electricity is the prime factor for an ordinary customer. Since most of the houses are not constructed for air conditioning so, proper insulation, false sealing and door closers, which are mandatory for effective air-conditioning, are not taken
care of while constructing the house. Above all, the whole room requires lots of cooling and therefore air-conditioning of such rooms requires very high consumption of electricity and high-powered air conditioners. Generally, a person taking sleep/rest requires only his bed air-conditioned. In practice an air-conditioner cools whole room, which is often not required. Continuous electricity supply is another problem for maintaining a constant temperature by air-conditioning. Since high-powered air-conditioners are required for rooms not designed for air-conditioning, it is often difficult to run them on inverter and impossible for running them on inverter for long duration. So, air-conditioner does not ensure unabated cooling by air-conditioner and thus maintenance of a constant temperature is difficult to achieve.
In the densely populated urban areas, noise pollution is another factor that disturbs people resting after day's hard labor. Most of the houses are not constructed sound proof. Therefore, sound pollution, even in air-conditioned rooms, keep rest elusive to people staying in such rooms.
Mosquitoes are another problem to take rest or even stay in a place full of mosquitoes. Air conditioning is just a solution to soaring temperature. People use uncomfortable and uneasy ways like mosquito net, mosquito repellant cream and mosquito repellant coil/liquid/sprays to keep mosquito away.
The wastage in cooling the whole room when cooling of only the resting area i.e. bed was required was realized. An attempt was made to avoid wastage of cooling by producing portable air-conditioners of different types, for personal air-conditioning. But they could not solve the problem of air-conditioning the desired area.
The invented device is an enclosed air-conditioned bed that is a cozy place for resting/sleeping. The objective of the invention is to make air-conditioning affordable by saving in power consumption and providing air-conditioning even in the case of power failure by the means of inverter. The enclosed bed is a small place to maintain free from flying insects like mosquitoes. The airtight enclosure is made of insulator substances and its soundproof
quality keeps noise disturbance away. Most of the modern air-conditioners have humidity control function. Hence, in sum total, this air-conditioned bed is an ideal rest-taking device, which is free from all the problems faced even by ordinary air-conditioner users.
Ti = inside temperature;
RH = Relative humidity;
BTU = British thermal unit;
Sec = second;
Mm =millimeter;
Amp = amper;
To = outside temperature;
Cfm - cubic feet per minute; and
Deg C = degree Centigrade (Celsius).
Air-Conditioner power calculations:
IfTi = 23 deg C,RH = 50-45
And To = 40 deg C, RH =100
Heat to be lost per pound of dry air = 25+15 = 40 BTU.

Heat influx = 550.8 watts for polystyrene foam insulation, (sensible heat)
Heat generation for 2 persons (adults) = 2X102.55 = 205.1 watts (134.78
watt sensible heat and 70.32 latent heat)
Minimum ventilation per person = 5 cfm,
Or, 10 cfm for 2 persons.
Hence heat load = 756 watts and 10 cfm of ventilation
10cfm = 0.17cfs.
28 kg of air occupies 22.4 cubic meter
or 61.6 pounds occupy 791 cub ft
or 01 cub ft. weighs 0.08 pounds.
Hence, sensible heat due to 0.17 cu ft/sec ventilation = 0.08 X 0.17 X 40
= 1920 BTU/hr = 562 watts.
Total heat load = 756 + 562 = 1318 watts.
Assuming Cop of a standard refrigeration cycle ~ 4.
Power consumption of compressor ~ 1318/4 = 329 watts at continuous
duty cycle of compressor.
Tonnage of this Air-conditioner (AC) =1318/3500 =0.377 Tons.
Hence an AC of 0.5 tons capacity would be sufficient to cool the space in
the bed.
A 0.5-ton AC would draw about 4 amps current. This translates to about 880 VA. But since starting current is about 6 times rated current, intermittently power would go up 4.8 KVA. Hence a 5 KVA inverter should be able to run 0.5-ton AC. The calculations show that at the most 0.377-ton power AC is sufficient to make the invention successful. The requirement of the inverter would be 5 KVA. These are theoretical calculations based upon hypothetical condition. In real time situation human body should not radiate this much heat in an air-conditioned environment. Therefore, lesser power should be required to maintain the requisite temperature.
In the figure 1, insulated walls have been mounted upon the bed by the support of steel angles. A roof has been laid of the same or similar insulated material to make the enclosed place airtight. The cool air outlet of the AC is mounted upon one side of the vertical wall in which hole for inserting the face of the AC has been created. The insulated walls are double sheets of some insulating material and polystyrene foam sheet of 5 mm width has been filled to fill the gap between the insulating sheets. The power cord is connected to the power supply and the inverter. To get inside and come outside the enclosed bed sliding doors have been placed
on both the sides of the bed. The doors have been fitted with large transparent polycarbonate double walled windows.

I Claim:
1. An air-conditioned bed, comprising:
(a) a bed as a means for taking rest;
(b) an air-conditioner of power between 0.377 ton and 0.5 ton as a means for air-conditioning;
(c) an insulated enclosure, as a means for holding the air-conditioned air and thus maintaining the desired temperature inside the enclosed place, that covers the resting side of the bed from all the open sides (five sides in case of rectangular box shaped enclosure) in such a way that enclosed top horizontal portion of the bed that provides resting place becomes air tight;
(d) at least one of the sides of the enclosure carries entry/exit device to provide easy access inside/outside the enclosed bed;
(e) one hole big enough to mount the cool air outlet face of the air-conditioner inside the enclosure for cooling the enclosed place;
(f) a supporting device as a means to mount the air-conditioner;
(g) an electric circuit including proper wire as a means connecting the air-conditioner to the power supply; and
(h) an inverter of power around 5 KVA attached to the circuit of air-conditioner or main power supply as a backup means to continuous power supply.
2. The insulated enclosure as mentioned in the point (c) of the claim 1 may make of one or more layers of insulating material.
3. The insulating material as mentioned in the claim 2 may be of different insulating materials.
4. Polystyrene foam or similar insulator as mentioned in the claim 2, may separate the insulating material layers of the enclosure.
5. The inner surface of the enclosure as recited in the point (c) of the claim 1, may be of height around four feet from the upper horizontal resting surface for comfortable sitting inside the enclosed bed.
6. The entry/exit device as mentioned in the point (d) of the claim 1, may be fitted with transparent polycarbonate single or double walled panel windows.
7. The air-conditioner as recited in the point (b) of the claim 1, may be of power 0.5 ton.
8. The entry/exit device as mentioned in the claim 6, may be on more than one side of the bed.
9. The insulated enclosure as mentioned in the point (c) of the claim 1, may contain some other device to the device mentioned in the claim 6 for entry/exit into/from the enclosed bed.
10. A tool kit for air-conditioning bed comprising all the points recited in claim 1, which may exclude the point (a) recited in the claim 1.



Patent Number 270064
Indian Patent Application Number 1185/DEL/2004
PG Journal Number 48/2015
Publication Date 27-Nov-2015
Grant Date 27-Nov-2015
Date of Filing 25-Jun-2004
Name of Patentee PANDEY, PRADYUMNA
Applicant Address 31-C, MOTILAL NEHRU ROAD, ALLAHABAD-211002, U.P., INDIA.
# Inventor's Name Inventor's Address
PCT International Classification Number A47C 17/86
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA