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Refrigerators
Does the light really go out when we close the door? From the early icebox to the modern built-in frost-free stainless steel double door works of art, refrigerators have improved greatly over the years, and we seldom think about them until they don't work right. From cleaning methods to repairs, this category is the place to get advice and answers to your questions about refrigerators.
3,286 Questions
The freezer is located at the top of the refrigerator. Explain why?
My freezer is at the bottom. The freezer being at the top isn't universal, it was just a common design for a time.
What state is refrigerant leaving receiver?
Refrigerant exits the receiver in a liquid state as it is stored and accumulated in this component after leaving the condenser. It serves as a temporary storage vessel before entering the expansion device in the system.
What material the make the fridge?
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What gas is present in the middle space of the refrigerators?
The gas present in the middle space of refrigerators is usually a refrigerant such as Freon or a more environmentally friendly alternative. This gas is compressed and expanded in a continuous cycle to transfer heat and keep the inside of the refrigerator cool.
Is a magnet on front of a refrigerator friction?
No, a magnet on the front of a refrigerator does not create friction. Friction occurs when two surfaces rub against each other, creating resistance to motion. The magnet on the refrigerator attaches due to magnetic force, not friction.
What is the most common refrigerant used in household refrigerators is?
The most common refrigerant used in household refrigerators is R-134a.
Yes, inhaling R134a can cause dizziness, headaches, and respiratory irritation. In high concentrations, it can lead to asphyxiation by displacing oxygen in the air. It's important to handle and use R134a with proper safety precautions and in well-ventilated areas.
Where does the heat go in a refrigerator?
In a refrigerator, heat is removed from the interior compartment and expelled into the surrounding room through the condenser coils located at the back or bottom of the refrigerator. This process allows the interior of the refrigerator to stay cool while the heat is dissipated into the room, helping to maintain a cold environment inside the fridge.
How can metal help to close a fridge door?
Magnets can be used to help a metal fridge door close by attracting and holding the door in place. Adding a small metal plate to the door or using magnetic strips along the edges can create a stronger seal when the door is closed.
Do refrigerator filters remove chloramines?
Yes, most refrigerator filters are effective in removing chloramines, which are a combination of chlorine and ammonia often used as a disinfectant in water treatment. These filters typically use activated carbon to adsorb chloramines and other impurities from the water, providing you with cleaner and safer drinking water.
What is the evaporator cycle in refrigeration?
The evaporator cycle in refrigeration involves the refrigerant absorbing heat from the surrounding space, causing it to evaporate and turn into a low-pressure gas. This process cools the space and allows the refrigerant to carry the absorbed heat to the condenser for release. The cycle repeats as the refrigerant circulates through the system to maintain the desired temperature.
What is the purpose of an evaporator in the refrigeration cycle is to?
The purpose of the evaporator in the refrigeration cycle is to absorb heat from the space being cooled, causing the refrigerant to evaporate and turn into a gas. This process cools the air inside the space and allows the refrigerant to carry the absorbed heat to the compressor for further processing.
What is the purpose of primary refrigerant?
Primary refrigerants are used in refrigeration systems to absorb and release heat as they circulate through the system, enabling the cooling process. They play a key role in transferring thermal energy, allowing for effective cooling and maintaining desired temperatures in various applications such as HVAC systems, refrigerators, and freezers.
Why have refrigerator have dubble wall?
Refrigerators have a double wall to provide better insulation. The space between the two walls is usually filled with a gas or foam insulation to help maintain a consistent temperature inside the refrigerator, making it more energy efficient and reducing the workload on the compressor.
Why must no foreign vapors be left in a refrigeration system?
Foreign vapors left in a refrigeration system can contaminate the refrigerant and cause a decrease in system efficiency, potentially leading to system malfunctions or failures. It can also cause chemical reactions or create harmful byproducts that may be harmful to the system components or environmental health. Proper purging is essential to maintain the system's performance and longevity.
If the compressor in a refrigerator stopped working, the heat transfer cycle would be disrupted because the compressor is responsible for circulating refrigerant and compressing it to remove heat from the interior of the refrigerator. Without the compressor, the refrigerant cannot absorb heat from the interior and release it to the surroundings, resulting in a lack of cooling inside the refrigerator.
Why is the cooling unit of a refrigerator made at the top?
The cooling unit of a refrigerator is typically placed at the top because hot air rises, allowing for easier dissipation of heat. Placing the unit at the top also prevents it from being blocked by food items in the fridge. Additionally, having the cooling unit at the top helps maintain a consistent temperature throughout the refrigerator.
Non condensables in a refrigeration system result in what?
Non-condensable gases in a refrigeration system can lead to reduced system efficiency and cooling capacity. They can cause increased pressure, temperature, and energy consumption, which can result in decreased cooling performance and potentially damage system components over time.
What metal is a fridge made of?
A fridge is typically made of stainless steel. This material is preferred for its durability, resistance to corrosion, and ease of cleaning. Some fridges may also contain components made of aluminum, copper, and plastic.
How could salt take the place of a refrigerator?
Salt can be used to preserve food by drawing out moisture and creating an inhospitable environment for bacteria growth. In this way, salt can be used to extend the shelf life of perishable items without the need for refrigeration. However, it is limited in its effectiveness and not suitable for all types of food.
Can someone get ill if you put hot food directly into the fridge?
Heating food will destroy any pathogens in it. Cooling it back down doesn't cause these pathogens to grow again, but they can if there is a source in the fridge from which they can spread to this new food. Refrigeration is only used to keep food from spoiling for a longer period of time rather than simply leaving it out. It can only encourage bacteria growth if the interior (and food) is cool AND humid.
How does an evaporator in refrigeration system operates?
In a refrigeration system, the evaporator operates by absorbing heat from the surrounding space or material, causing the refrigerant inside to change from a liquid to a low-pressure gas. This process cools the space or material while the warm refrigerant gas is then compressed and pumped back to the condenser to release the absorbed heat.
What were the challenges for making a refrigerator?
The largest challenge was (and still is) finding and making refrigerants that are both safe and effective. The earliest refrigerants were either highly toxic and/or highly flammable, many people died because of refrigerators using these refrigerants. With DuPont's invention of freons which are both nontoxic and nonflammable and thus seen as the ideal refrigerants, the refrigeration industry took off. But with the discovery that freons destroy the protective ozone layer of the atmosphere it has again become necessary to seek new refrigerants, most of the current options are slightly flammable!
Another challenge was to develop seals for the pumps that compress the refrigerant that won't fail prematurely, allowing possibly toxic or flammable refrigerants to escape. Albert Einstein invented an electromagnetic pump with no moving parts (thus needing no seals), but the invention of "safe" freons made this unnecessary (however it later found use in liquid metal cooled nuclear reactor designs).
What does quality mean in a refrigerant system?
In a refrigerant system, quality refers to the ratio of the mass of vapor to the total mass of vapor and liquid in the system. It indicates the state of the refrigerant mixture, with a quality of 1 representing pure vapor and a quality of 0 representing pure liquid. Quality is an important parameter in determining the behavior and performance of the refrigerant system.
How does a refrigerator is able to maintain a constant cool temperature?
A refrigerator maintains a constant cool temperature by using a compressor to circulate refrigerant through a closed system of coils. The refrigerant absorbs heat from the interior of the fridge and releases it outside. A thermostat controls the compressor to ensure that the temperature inside remains stable.
