About the purchase and use of chillers Industrial chillers

The domestic vertical and horizontal injection molding machines are matched when the condensation temperature of the heat dissipation water of the water-cooled chiller is below 35 degrees (the condensation temperature of the air-cooled chiller is below 43 degrees) when the domestic vertical and horizontal injection molding machines are used at normal ambient temperatures.

A: The first way:

1hp water-cooled chiller can be equipped with 80 tons of clamping force, and the temperature of the injection molding machine is controlled at 5-10 degrees;

The 1hp water-cooled chiller can be equipped with 100 tons of clamping force, and the temperature of the injection molding machine is controlled at 10-15 degrees;

The 1hp water-cooled chiller can be equipped with 120 tons of clamping force, and the temperature of the injection molding machine is controlled at 15-20 degrees;

The matching of the air-cooled chiller is twice that of the water-cooled chiller, that is, the temperature of the injection molding machine with 64 tons of clamping force can be controlled at 5-10 degrees for the 1hp air-cooled chiller. ）

b: The second way:

The 1hp water-cooled chiller can be equipped with a single injection volume of 10 qz, and the temperature of the injection molding machine is controlled at 5-10 degrees.

Injection weight: 1qz=

The above formula is the result of the summary of the sutras. In addition to using the above formula, the salesman should consider the actual situation of filtration and choose the appropriate chiller.

C: The matching of the chiller and the cooling water tower, according to the actual experience in the past, the 1hp chiller needs a cooling tower with one ton of cooling water to take away the heat generated by the chiller.

Where is it used, I am a professional chiller.

When buying a screw chiller, it is very important to choose a chiller that suits you, but many people often don't know how to choose when purchasing.

When purchasing the screw chiller, we must first understand the main control parameters of the screw chiller, such as refrigeration coefficient, refrigeration capacity, refrigerant type and a series of parameters, you can take a look at a few more for comparison, these factors need to be considered, the refrigerant in the choice of pay more attention to whether it is an environmentally friendly type of refrigerant, now the environmental protection requirements are relatively strict, we try to choose a choice that meets the environmental protection requirements.

When choosing the right screw chiller, you should consider the suitable chiller model according to your own cooling load and use, how do you need the screw chiller to run, how long does it take, how many piston compressor units do you need or how many screw compressor units, how to adjust it is more convenient, and how to save energy is a better ......These are all needed to be chosen, we should take into account their own use, how much power can be accepted, pay attention to the model you choose, if you want your power and current to be within the normal working range of the model, generally choose a unit with a relatively high coefficient of performance, and the equipment with a flat efficiency curve is generally your preferred choice.

It is necessary to pay attention to the load of the screw chiller according to your actual situation, take into account the specific performance of the chiller, the water temperature and flow rate of the chiller are what we need to pay attention to, and how long it takes to get the water temperature under the rated power, which needs to be carefully calculated. If it exceeds a certain temperature, it is necessary to consider whether the compressor can withstand it and whether the power is sufficient.

<>, especially for users who purchase chillers for the first time, it is necessary to clarify the purpose of procurement, recognize the reality of the industry, and strive to "win big with small". Therefore, Kaideli chiller, combined with the actual situation of our customers purchasing chillers, give industry friends some practical ways on how to reduce the cost of chiller freezer procurement.

First, the factor is not unique

Industrial equipment should also consider the cost performance. To a certain extent, there is an inevitable connection between ** and quality, but ** grid is not the same as ** value. When purchasing chillers, it is necessary to pay attention to checking the first-class plan and accessory configuration list provided by the other manufacturer.

For example, what is the configuration of the chiller compressor, how is it ranked at the industry level, and the same ** plan, manufacturer A is a grade higher than manufacturer B, is it explainedDoes manufacturer A have more advantages than manufacturer B? Not necessarily.

Because the chiller is put into use, the brand compressor configuration is good, but the overall solution combined with other supporting facilities is the key point of consideration. If the compressor configuration is good, but the water pump and condenser are made of inferior materials, the overall scheme seems to be high-end, and it is also very beautiful, but after purchasing, it may cause a series of problems.

Clause.

Second, the key to the selection of compressors

There is no doubt that the compressor is the "heart" of the entire chiller, and the careless selection of the compressor will cause fatal problems in the later stage, such as unstable refrigeration and loud noise, which will seriously affect production.

Compressor is the main indicator that affects the performance of the chiller, many chiller manufacturers with weak qualifications, in the process of producing chillers, adopt the method of reducing the procurement cost of the compressor, using inferior compressors, and even the refurbishment of second-hand compressors in violation of regulations.

Clause.

Third, starting from the situation of the enterprise

Nowadays, the chiller has been developing in the direction of personalization and non-standard, and the area where the enterprise is located is customized and selected, such as the arid areas in the north and northwest, in addition to referring to the normal selection factors, we will select the chiller for customers according to the local climate, temperature and humidity, wind and dust.

Enterprises use environments for selection, such as chillers working in humid environments. Priority is given to customizing the stainless steel shell chiller for you, or under the special working fluid requirements, choose evaporators, condensers and other components made of special materials such as anti-corrosion.

Chiller procurement is very knowledgeable,Kedley reminds you and your company that when purchasing chillers, compare more plans, consider their own actual conditions, communicate more with industry professionals, and seek the best chillers. Summarize the factors that enterprises need to pay attention to when purchasing chillers: cost performance, proportion of core accessories, the region where the enterprise is located, the use environment of the enterprise, etc.

The main application fields of chillers are:

1. Laser field.

The laser chiller can be used to control the temperature of the laser, keep the laser cavity without thermal deformation, stabilize the light output power and ensure the quality of the beam, and improve the service life and cutting accuracy of the laser.

2. In the field of CNC machinery.

The chiller controls the temperature of the spindle of the CNC machine tool through water circulation, keeps the spindle at a low temperature, prolongs the service life of the spindle, and improves the accuracy of its engraving and cutting quality.

3. UV printing and UV lighting.

The main application of UV printing and UV lighting equipment is UV flatbed printing machine, UV screen printing machine, UV-LED ultraviolet curing lamp, UV-LED ultraviolet curing equipment, UV-LED ultraviolet curing equipment, etc.

Guangdong Taichang ventilation and cooling.

2019-09-05 · 20 years of focus on the cooling and ventilation solutions of tall factories.

Concern. What are the uses of chillers?

1.Plastics industry: accurately control the mold temperature of various plastic processing, shorten the beer-plastic cycle, and ensure the stability of product quality.

2.Electronic industry: stabilize the molecular structure of electronic components in the production line, improve the qualification rate of electronic components, and apply it to the ultrasonic cleaning industry to effectively prevent the volatilization and volatilization of expensive cleaning agents from causing harm to people.

3.Electroplating industry: control the electroplating temperature, increase the density and smoothness of the plating parts, shorten the electroplating cycle, improve production efficiency, and improve product quality.

4.Machinery industry: control the pressure oil temperature of the oil pressure system, stabilize the oil temperature and oil pressure, prolong the service time of the oil, improve the efficiency of mechanical lubrication, and reduce wear.

5.Construction industry: supply chilled water for concrete, so that the molecular structure of concrete is suitable for the requirements of building use, and effectively enhance the hardness and toughness of concrete.

6.Vacuum coating: control the temperature of the vacuum coating machine to ensure the high quality of the plated parts.

7.Food industry: for high-speed cooling after food processing to adapt it to packaging requirements. In addition, there is also the control of the temperature of fermented foods.

8.Pharmaceutical industry: It is mainly used in the pharmaceutical industry to control the temperature control of fermented drugs. Pharmaceutical companies should make full use of chiller equipment, continue to strengthen technological innovation on the basis of giving full play to their advantages, and enhance the cost performance of chillers, so as to better serve the pharmaceutical sector.

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The air-cooled chiller contains an insulated water tank and a water pump in its body, so there is no need for a cooling tower to dissipate heat. It is very easy to install and move. However, it has higher requirements for the working environment, first of all, because it is refrigerated by hot air circulation, so if the ventilation effect of the installation workshop is not good, it will directly affect the cooling effect of the chiller.

In addition, if you want to put the chiller in a dust-free workshop with humidity requirements, then I recommend that you modify it to a water-cooled one. Because of the air-cooled chiller, water vapor will be sprayed on the top of the machine to dissipate heat.

Water-cooled chillers can be divided into open, sealed (some are called box type) and screw type. First of all, it should be stated that the water-cooled chiller must be equipped with a cooling tower and a water pump to pump hot water for heat dissipation. In order to achieve a good cooling effect.

The open chiller also needs to install a separate water tank, but the sealed one does not need to be built-in, because it has a built-in water tank. The open is generally installed somewhere outside the workshop, and it is easy to overhaul, but because it is not beautiful enough, it produces a sealed water-cooled chiller, because it is a box structure, so it is more popular. But if you have very large requirements for cooling capacity, you should choose a screw chiller, which we generally call a chiller.

1. For the cold source of large-scale centralized air-conditioning system, it is advisable to choose a chiller with compact structure, small footprint, refrigeration compressor, condenser and other equipment assembled on the same frame.

2. According to the water temperature, water quantity, water quality and the possibility of cooling equipment setting, determine whether to use water-cooled chiller or air-cooled chiller.

3. If there is a suitable heat source, especially in the place where there is waste heat or waste heat or where there is a lack of electricity, the absorption chiller should be selected.

Kassel teaches you how to choose a chiller:

1. Refrigeration system load = indoor load + reheat load + fresh air load. If the total load of the air conditioning system is calculated from the estimated budget of the air conditioning load, then the load of the refrigeration system = the total load of the air conditioning system.

2. When choosing an electrically driven chiller, when the cooling capacity of a single air conditioner Q>1163KW, it is advisable to choose a centrifugal chiller: when Q=580-1163KW, it is advisable to choose a centrifugal or screw chiller: when Q<580KW, a piston chiller should be used.

When the average outdoor temperature is higher than -10 in winter, the heat pump type hot and cold water unit can be selected.

3. The refrigeration system of an electrically driven refrigerator is about three times higher than that of the thermal system S of an absorption refrigerator. The order of consumption from low to high is: centrifugal type, screw type, piston type, and absorption type.

Therefore, absorption chillers should only be used when there is a suitable heat source, especially in places where waste heat or waste heat can be used, or where there is a lack of electricity.

4. The refrigeration mechanism is generally suitable for 2-4 units, 2 units for small and medium-sized scales, 3 units for larger scales, and 4 units for extra-large scales. The possibility of mutual standby and rotational use should be considered between units. The combination of units with different capacities can be used in the refrigeration machine room to save energy consumption.

5. When choosing a refrigerator, the pollution to the environment should be considered: first, noise and vibration, to meet the requirements of the surrounding environment: second, the degree of harm of the refrigerant to the atmospheric ozone layer and the size of the greenhouse effect.

1. What is the zero cold water function?

The gas water heater at home is generally installed in the kitchen, and the master bedroom bathroom or secondary bathroom is usually seven or eight meters away from the kitchen, and the water in the hot water pipe at this distance will become cold water after the water heater is turned off.

The working principle is to pump out the remaining cold water in the hot water pipe through the circulating pump to achieve circulating heating, so as to ensure that the water in the water pipe is hot water.

According to the location of the circulating pump, it is classified as "built-in type" and "external type".

Built-in model: The circulating pump is built into the water heater, and the appearance is no different from other water heaters.

External model: The circulating pump is installed separately outside the water heater, which is aesthetically inferior to the built-in model and takes up a little more space.

The external circulating pump is mainly in the energy rate and the Linnei model, which is thousands of yuan cheaper than its built-in; Domestic models are basically built-in models.

The functions realized by these two types are the same, the built-in model and the water heater are integrated, and the maintenance is inconvenient; The circulating pump of the external model is broken, and it can be repaired or replaced.

2. The realization method of zero cold water function.

No return pipe installation method:

After the circulating pump is operated, the residual water of the hot water pipe flows into the cold water pipe through the check valve, and then flows out along the cold water pipe into the water heater for circulating heating, so as to maintain a certain temperature in the water pipe.

There is a problem: the residual water of the hot water pipe is pumped into the cold water pipe at the farthest end, in addition to returning to the water heater for circulating heating, some of it will be retained in the cold water pipe at each outlet point along the cold water pipe, resulting in the overall water temperature rising, and the long-term heating of the cold water pipe will affect the service life; In addition, hot water may be produced at the outlet point where you don't want to produce hot water, such as toilets, water purifiers installed in the kitchen, etc.; If you want to use cold water, you need to put off the hot water first.

Fortunately, there is a solution to the new problem, although it is not perfect:

Reducing the temperature of the water that is set to preheat the cycle does not need to be set to the temperature required for bathing, and setting it to within 35 degrees Celsius does not affect the comfort at all.

Reduce the number of preheating cycles, such as jog cycles, once when in use, and the water temperature in the hose will slowly decrease when not in use.

Install a return pipe openly, so that the return water uses a separate pipe, to achieve the same effect as the reserved return pipe, the disadvantage, will affect the aesthetics of the overall decoration.

Another solution is not through the circulating pump, but through the storage type kitchen treasure to achieve the function of hot water, and a kitchen treasure can only solve a point of hot water, and at the same time, because of the limitation of water storage capacity, can not solve the problem of bathing.

There is a return pipe installation method: