Evaporative air cooler with cold storage using peltier modules

Abstract

The present invention pertains to the field of air cooling equipment for cabins of trucks and motor vehicles, and relates more specifically to an evaporative air cooler with cold storage, using Peltier modules and water ozonisation, designed to provide efficient cooling in the cabin of a truck or motor vehicle, overcoming the energy limitations of the battery and preventing the growth of fungi and bacteria in the system without depleting the power supply of the vehicle.

Description

[0001] Evaporative air conditioner with cold storage using Peltier modules.

[0002] Technological sector of invention

[0003]

[0001] The present invention belongs to the sector of air conditioning equipment for truck and motor vehicle cabins, and refers, more specifically, to an evaporative air conditioner with cold storage, using Peltier modules and water ozonation, designed to provide efficient cooling in the cabin of a truck or motor vehicle, overcoming the energy limitations of the battery and preventing the growth of fungi and bacteria in the system, without depleting the vehicle's energy.

[0004] State of the art

[0005]

[0002] Evaporative coolers are refrigeration systems that exploit the process of water evaporation to lower the ambient air temperature. To understand how these systems work and how different environmental factors influence their effectiveness, we need to consider basic principles of physics, thermodynamics, and heat transfer.

[0006]

[0003] The efficiency of an evaporative cooler is influenced by several interrelated factors. Firstly, the rate of water evaporation depends on the relative humidity of the air. In environments with low humidity, the air has a greater capacity to absorb moisture from the water, resulting in faster evaporation and, consequently, greater cooling. This is related to Dalton's Law or Raoult's Law, depending on the context.

[0007]

[0004] Furthermore, the temperature difference between the water and the air is crucial. The greater this difference, the greater the cooling potential. This is explained by Clausius-Clapeyron's Law, which describes the relationship between the rate of evaporation and temperature. Air temperature also indirectly affects the efficiency of the chiller, influencing its ability to absorb moisture.

[0008]

[0005] Another important factor is wind speed. Stronger winds help remove humid air near the cooler, facilitating water evaporation and consequently increasing cooling. This is linked to the theory of mass transfer, which describes how wind speed affects the rate of evaporation.

[0009]

[0006] The interaction of these factors is complex and can vary according to the specific conditions and design of the evaporative cooler. For example, coolers with a larger contact area between air and water tend to be more efficient, as do those with optimized ventilation systems.

[0010]

[0007] Evaporative coolers are an effective and economical alternative to conventional air conditioning systems, especially in situations where, for example, a truck is parked and the engine is off. Compared to air conditioning systems, evaporative coolers consume considerably less energy because they do not require refrigeration compressors.

[0011]

[0008] On this occasion, with the truck parked, conventional air conditioning, which normally depends on the engine running to operate, is not a viable option. Furthermore, prolonged use of air conditioning via the truck's battery system can result in rapid battery discharge, which can be inconvenient and even harmful on long trips.

[0012]

[0009] On the other hand, evaporative air conditioners work using the basic principle of water evaporation to cool the air. They draw hot air from the environment through a humid medium, where the water evaporates, removing heat from the air and reducing its temperature. This cooled air is then distributed throughout the truck's interior, providing a more comfortable environment for the driver or passengers.

[0013]

[0010] The importance of having improvements in an evaporative cooler is multifaceted. Firstly, it offers a more economical alternative in terms of energy consumption, which can result in significant long-term savings, especially for transport companies that operate a fleet of trucks. Furthermore, the thermal comfort provided by an evaporative cooler can contribute to the driver's safety and well-being, reducing the risk of fatigue and discomfort during long journeys or in adverse weather conditions.

[0014]

[0011] The superior performance of the evaporative air conditioner as revealed in the patent, capable of providing thermal comfort more than 50% better than conventional models, is an additional advantage. This means that this system is highly effective in reducing ambient temperature, even in adverse conditions, ensuring a more pleasant and productive interior environment for the driver or passengers.

[0015] New Invention Details

[0016]

[0012] In this context, to overcome the energy limitations of the truck's battery system, a cooling system is installed in the water reservoirs, either the upper or lower one, based on Peltier modules. While the vehicle is running, the water temperature is reduced in the thermally insulated reservoirs, which is not achieved in conventional equipment. All the energy needed to cool the water is supplied by the vehicle's alternator while the engine is running. During the operation of the evaporative cooler, when the vehicle is parked and the engine is off, this cooled water will provide an estimated increase of more than 50% in the driver's thermal comfort. In addition, the temperature inside the cabin will reach lower values ​​without depleting the energy stored in the truck's battery.Additionally, an ozonation system will be employed in the water reservoirs to minimize the growth of fungi and bacteria in the evaporative cooler system, unlike equipment available on the market that requires the use of special chemical agents, such as additives for the reservoir water.

[0017] Description of the attached drawing

[0018]

[0013] In order for the present invention to be fully understood and put into practice by any technician in this technological sector, it will be described in a clear, concise and sufficient manner, based on the attached drawing, which illustrates and supports it, listed below: Figure 1 represents a flowchart of the operation of the evaporative air conditioning system.

[0019] Detailed description of the invention.

[0020]

[0014] The invention comprises an evaporative air conditioner consisting of a refrigerated reservoir (RR) that is integrated into the timed ozonizer (OT) powered by 12V or 24V, also integrated with a recirculation pump (BR) with a flow of less cold water associated with a Peltier cooler (RF), which has a connection to the flow of colder water returning to the reservoir (RR); also having another recirculation pump (BR2) with a flow of cold water that is injected into the air conditioner's straw; the refrigerated reservoir (RR) has a temperature sensor (ST) and an empty tank sensor (SQ) integrated into the temperature controller (CT), so that the signal from the empty tank sensor (SN) is also sent to the air conditioner controller for retrofitting options; the local temperature controller (CT) is powered by 12V or 24V and is connected to the timed ozonizer (OT) by relay (or MOSFET) control to activate it;It is connected to the recirculation pumps (BR)(BR2), with the recirculation pump (BR2) being connected via relay (or MOSFET) control to turn it on or off, coming from the central air conditioner controller via I2C for the option of complete air conditioner supply or for retrofitting; and it is connected to the Peltier cooler (RF) via relay (or MOSFET) control to activate it; it has a bidirectional I2C (or similar) communication network for communication with the central air conditioner controller; and in the case of a separate product, the local controller does not communicate with the central controller and performs its function independently.

[0021]

[0015] The timed ozonizer (OT) is a conventional ozonizer powered by a voltage of 12 to 24V. The local temperature controller (CT) sends a command via relay to turn the ozonizer on and off for a sufficient time to have bactericidal and fungicidal action on the water and straw of the air conditioner, without reaching a concentration that could harm the driver in the cabin. The local temperature controller establishes the necessary timing.

[0016] This same refrigerated reservoir for air conditioners, functioning as a cooling battery, can have its configuration adapted for air conditioner versions that use an upper reservoir, but the operating principle will change.

[0022]

[0017] It is important to emphasize that the figure and description provided do not limit the ways in which the inventive concept now proposed can be implemented, but rather illustrate and make understandable the conceptual innovations revealed in this solution. Thus, the descriptions and images should be interpreted in an illustrative and not limiting way, and there may be other equivalent or analogous ways of implementing the inventive concept now revealed that do not fall outside the scope of protection outlined in the proposed solution.

Claims

CLAIM 1- EVAPORATIVE AIR CONDITIONER WITH COLD STORAGE USING PELTIER MODULES characterized by being formed by a refrigerated reservoir (RR) that is integrated into the timed ozonizer (OT) powered by 12V or 24V, also integrated with a recirculation pump (BR) with a less cold water flow associated with a Peltier cooler (RF), which has a connection to the colder water flow returning to the reservoir (RR); also having another recirculation pump (BR2) with a cold water flow that is injected into the air conditioner's filter; the refrigerated reservoir (RR) has a temperature sensor (ST) and an empty tank sensor (SQ) integrated into the temperature controller (CT), so that the signal from the empty tank sensor (SN) is also sent to the air conditioner controller for retrofitting options; The local temperature controller (CT) is powered by 12V or 24V and is connected to the timed ozonizer (OT) via relay (or MOSFET) control to activate it;It is connected to the recirculation pumps (BR)(BR2), with the recirculation pump (BR2) being connected via relay (or MOSFET) control to turn it on or off, coming from the central air conditioner controller via I2C for the option of complete air conditioner supply or for retrofitting; and it is connected to the Peltier cooler (RF) via relay (or MOSFET) control to activate it; it has a bidirectional communication network of type I2C or similar for communication with the central air conditioner controller; and in the case of a separate product, the local controller does not communicate with the central controller and operates independently.

Images