Why can t the cold storage be warm? What are the reasons why the temperature of cold storage cannot

There are many possibilities for the temperature not to drop, first of all, you have to check the external causes of the system, whether your inventory is looking for load, whether the evaporator frost is thick, whether the air-cooled evaporator is blocking the air duct, and whether your thermometer is broken. There is no problem with these and then check the system, from the pressure you give should be too high pressure, resulting in too large a high compression ratio, that is, the cooling effect is not good, if it is water-cooled, check the water volume and water temperature. After that, check whether the filter at the outlet of the condenser and the filter at the inlet of the expansion valve are blocked.

If you don't have experience, you can see if the expansion valve frost is in a 45-degree T-shape under the valve body, and listen carefully to whether there is a sound of rapid water flow behind the expansion valve. In the end, it is possible that the suction and discharge valve group of your machine is broken, causing the bottom high-pressure gas (maybe your pressure gauge is broken and you can't see the real value). However, the later part of the system will need to be checked by professionals.

Hope it helps.

1.Check that the refrigerant is fully filled.

Treatment: Look at the frost condition of the pipe and judge the pressure and current, and don't continue to look down (o).

2.The high pressure is too low, and the system circulation power is insufficient.

Treatment: Turn off the cooling tower fan, and then add bypass.

3.With the wrong oil, there are solid compound impurities in the system.

Treatment: The pipe has been blown through, so it is mainly blocked in the suction filter of the compressor, the filter element can be replaced, and if there is more garbage, it should be replaced several times, and the expansion valve should also be removed and cleaned.

4.Evaporate oil accumulation in the manifold pipe.

Treatment: Check whether there is an oil return bend in the pipeline, and if so, check whether the oil return of the oil separation system is normal. (Mainly check the check valve on the oil content and the float valve in the oil content).

5.Check the electronic control system.

Treatment: There is low voltage protection, negative pressure does not stop?。 Check the temperature control, oil pressure, high voltage, low voltage and electrical components in the electric control box.

6.No matter how cold it is, it is the reason for the design and construction.

The cold storage cannot reach the temperature, the insulation of the wall of the storage body is not done well, the compressor power is small, the running time exceeds the limit and the efficiency becomes low, and the heat dissipation of the outdoor unit is poor.

This may be due to poor heat dissipation effect, clean the radiator first, and then see if it can achieve the cooling effect. There is also a reason for the aging of the compressor.

1. Equipment failure.

2. Poor sealing conditions of cold storage.

3. The power of the equipment does not match.

1. System cooling capacity.

insufficient, insufficient refrigeration capacity, refrigerant.

There are two main reasons for insufficient circulation, the first is that the refrigerant fill is insufficient, in which case only a sufficient amount of refrigerant needs to be filled. Another reason is that there are many refrigerant leaks in the system, in this case, you should first find the leakage point, focus on checking the pipeline, valve connection, detect the leakage and repair, and then add a sufficient amount of refrigerant.

2. Due to poor thermal insulation or sealing performance, the cold storage has excessive cooling loss and poor thermal insulation performance. It is due to the insufficient thickness of the insulation layer such as pipelines and warehouse insulation walls, and the poor thermal insulation and thermal insulation effect, mainly due to the thickness of the design insulation layer or the poor thermal insulation quality during construction. The use of insulation materials in the construction of thermal insulation and moisture-proof performance can be caused by moisture, deformation, and even corrosion, and the insulation capacity is reduced.

In general, if condensation occurs in the sealing of the warehouse door or cold storage wall, it means that the seal is not tight. In addition, frequent switching of warehouse doors or more people entering the warehouse together will also increase the cooling loss of the warehouse. Try to avoid opening the cold storage door frequently to prevent large amounts of hot air from entering the storage room.

Of course, the warehouse enters the inventory frequently or excessively large, heat load.

It usually takes a long time to cool down if it increases dramatically.

Whether the refrigeration unit is faulty.

If there is refrigerant leakage, the condenser is too dirty, the fan motor is abnormal, etc., the refrigeration and cooling capacity will naturally not achieve the preset effect, and at this time you need to go to the local regular maintenance shop to check and repair.

Dongfeng Tianjin refrigerated truck.

What is the thermal insulation effect of the cold compartment.

After the chiller is confirmed to be normal, it is necessary to confirm the thermal insulation state of the refrigerated truck, and whether there is any obvious leakage condensation part.

Jiefang Long V refrigerated truck.

Avoid the goods blocking the chiller evaporator.

When the car is loading the goods, it is necessary to pay attention not to stack too many goods in front of the outlet of the evaporator of the refrigerated truck, otherwise it will hinder the circulation of the cold air in the car, and the loading of too many goods, the blockage above the goods will lead to a short circuit in the cold air flow, so the temperature in the compartment can not be lowered.

Jiefang JH6 refrigerated truck.

Keep the cargo at a distance from the top of the cold compartment.

When loading the refrigerated truck, it must be noted that a certain distance must be maintained between the goods and the top of the cold compartment, and the minimum distance of 220 mm must be maintained.

All in all, the inside of the cold compartment can not reach the preset temperature, which is basically caused by the above reasons, and it is recommended that cardholders do not load too high or too much when loading goods. At the same time, I would like to share a cold trick with cardholders, no matter what kind of goods are loaded, the cold compartment will be pre-cooled for 1-2 hours in advance, and the refrigeration effect will be twice the result with half the effort.

The temperature of the cold storage is 18 degrees below 0, but it can't be played at 15 degrees, what's going on.

The temperature of the cold storage is 0 to 18 degrees, but to 15 degrees can not go down, what is going on, hello dear, there are many reasons why the temperature of the cold storage can not be lowered, list the following six common phenomena, for your reference: 1. The frost on the surface of the evaporator is too thick or too much dust, and the heat transfer effect decreases When the frost layer on the surface of the evaporator is too thick or the dust is too much, it will inevitably cause the heat transfer effect of the evaporator to decline. Because the surface temperature of the evaporator in the cold storage is mostly lower than 0, and the humidity in the warehouse is relatively high, the moisture in the air is easy to frost on the surface of the evaporator, or even freeze, which affects the heat transfer effect of the evaporator.

To prevent the surface of the evaporator from being too thick, it needs to be defrosted regularly. 1 Here are two easier ways to defrost:1

Shut down for defrosting. That is, stop the operation of the compressor, open the door of the Hengdan warehouse, let the storage temperature rise, and restart the compressor after the frost layer automatically melts. 2.

Frosting. After the goods in the warehouse are removed, the surface of the evaporator pipe is directly washed with hot tap water to dissolve or fall off the frost layer. 3.

In addition to the poor heat transfer effect of the evaporator due to excessive frost thickness, the heat transfer efficiency of the evaporator will also be significantly reduced due to the excessive dust accumulation on the surface of the evaporator due to long-term uncleaned. 2. Due to poor thermal insulation or sealing performance, the cold storage has a large cooling loss, and the poor thermal insulation performance is due to the insufficient thickness of the insulation layer of the pipeline, warehouse insulation wall, etc., and the poor thermal insulation and thermal insulation effect, which is mainly caused by the improper selection of the thickness of the insulation layer during design or the poor quality of thermal insulation materials during construction. In addition, in the process of construction and use, the thermal insulation and moisture-proof performance of the thermal insulation material may be destroyed, resulting in the moisture, deformation, and even erosion of the thermal insulation layer, and its thermal insulation ability decreases, and the loss of cold prevention capacity of the reservoir increases accordingly, and the decline of the storage temperature is significantly slowed down.

Another important reason for the large cold loss is the poor sealing performance of the warehouse, and more hot air invades the warehouse from the leakage. Generally, if there is condensation in the sealing strip of the warehouse door or the sealing of the insulation wall of the cold storage, it means that the seal is not tight. In addition, frequent opening and closing of the warehouse door or more people entering the warehouse together will also increase the cooling loss of the warehouse.

The door should be avoided as much as possible to prevent a large amount of hot air from entering the warehouse. Of course, when the warehouse incomes frequently or the purchase volume is too large, the heat load increases sharply, and it generally takes a long time to cool down to the specified temperature. Hope it helps.

1. Too much door opening causes insufficient cooling, 2. Cold storage insulation is not good, 3. Freon is not enough, 4. The radiator is not enough or the fan is broken.

The stored things are too wet, the frost is too fast, the condensation and heat dissipation are not good, the expansion valve is blocked, you can solve these by yourself, if not, you have to find someone.

First, the refrigeration is not enough, and it needs to be filled and cooled.

Second, the compressor is not working properly, check it.

Summary. Hello, the temperature of the cold storage can't be beaten.

Why can't the temperature of the cold storage be lowered?

The temperature of the cold storage cannot be beaten: first, the refrigeration is not enough, and it needs to be filled and colded. Second, the compressor is not working properly, check it.

Look at what items are stored and transported, such as: the general seafood requirements are qualified for storage and transportation below -18 degrees after quick freezing, and if it is fresh vegetables and fruits, it should be in the range of less than 4 degrees and more than 0 degrees, and the requirements are different. However, as a refrigerated truck, it needs to have a wide adjustment range to store and transport different items.

It can be adjusted between -30 and 10 degrees to adapt to different food storage and transportation requirements.

Only the correct use and operation of refrigerated trucks can ensure the intact delivery and preservation of goods;

The temperature of the cold storage cannot be beaten.

Hello, the temperature of the cold storage can't be beaten down The temperature of the cold storage can't be beaten down Why can't the temperature of the cold storage be beaten down: First, the refrigeration is not enough, and it needs to be filled with cold or clear. Second, the compressor is not working properly, check it.

Look at what items are stored and transported, such as: the general seafood requirements are qualified for storage and transportation below -18 degrees after quick freezing, and if it is fresh vegetables and fruits, it should be in the range of less than 4 degrees and more than 0 degrees, and the requirements are different. However, as a refrigerated truck, it must have a wide adjustment circle so that it can be used to store and transport different items.

It can be adjusted between -30 and 10 degrees to adapt to different food storage and transportation requirements. Only the correct use and operation of refrigerated trucks can ensure the intact delivery and preservation of goods;

Summary. Hello dear, the information I found for you shows that the cold storage does not start at the set temperature, and most of the motor and electrical control are faulty. During maintenance, it is necessary to check all kinds of electrical control components, as well as power supply and connection lines.

Hello dear, the information I found for you shows that the liquid land: cold storage to the set temperature does not start, most of the electric scatter stove and electrical control failures. During maintenance, it is necessary to check all kinds of electrical control components, and also to check the power supply and connection lines.

Power line fault analysis: If the compressor does not start, it is generally found from the power supply line first, such as the power supply fuse is blown or the wiring is loose, the disconnection is caused by the lack of phase, or the voltage of the electric source is too low. Exclusion Method:

When the power supply is out of phase, the motor emits a "humming" AC sound without starting. The thermal relay actuates for a little longer, and the contacts jump open. You can use the multimeter AC voltage block to check whether the fuse is blown or measure the image voltage, if the fuse is blown, replace the appropriate capacity fuse.

Motor burnout or inter-turn short circuit fault analysis: when the motor winding is burned or inter-turn short circuit, the fuse is often repeatedly fused, especially when the knife switch is pushed, it will be blown off.

Sometimes it starts normally, sometimes it doesn't, and the problem of the line is pro.

Power line fault analysis: If the compressor does not start, it is generally found from the power supply line first, such as the power supply fuse is blown or the wiring is loose, the disconnection is caused by the lack of phase, or the voltage of the electric source is too low. Exclusion Method:

When the power supply is out of phase, the motor emits a "humming" AC sound without starting. The thermal relay actuates for a little longer, and the contacts jump open. You can use the multimeter AC voltage block to check whether the fuse is blown or measure the image voltage, if the fuse is blown, replace the appropriate capacity fuse.

Motor burnout or inter-turn short circuit fault analysis: when the motor winding is burned or inter-turn short circuit, the fuse is often repeatedly fused, especially when the knife switch is pushed, it will be blown off.

Closed, encountered 3 times a month to the temperature does not start.

Faulty starting system, such as insufficient battery power, damaged starter or faulty starter circuitry;

Hello dear <>

The refrigeration effect of the cold storage cannot reach the set temperature, and there may be some reasons for the following: 1. Whether the configuration of the size of the refrigeration unit is reasonable, and whether the refrigerator is small. 2. Whether the temperature measured by the thermostat is consistent with the actual temperature, that is, the temperature probe may be broken and the measurement is inaccurate.

3. If none of the above conditions exist, it is necessary to see the status of the unit, has the refrigerant leaked? Do you see how many refrigerant bubbles are available in the sight window? Generally, there are no bubbles or very little bubbles, and a large number of megaspike bubbles are refrigerant, (the external machine is dirty and the heat dissipation is not good, which will cause insufficient liquid supply) 4. Check whether the expansion valve is dirty or blocked (the installation is not standardized, there is no vacuum, and the refrigerant used is not good and the purity is not enough) will also cause insufficient liquid supply and a decrease in refrigeration capacity.

5. There is also how the insulation effect of the cold storage is, and whether it is necessary to open the door frequently. It is recommended to make sure that the control box is okay first, and then go to the external machine for maintenance, check the heat dissipation effect, whether the condenser is dirty, check the pressure block, see if there is a lack of fluorine, and check whether the operating capacitor capacity of the single voltage machine has become smaller. Then check the inner machine.