Comparison Karcher K 7 Premium Full Control Plus vs Karcher HD 10/21-4 S

The maximum outlet water pressure provided by the miniwash; for models in which the pressure is not regulated, this paragraph indicates the standard operating value.

The higher the water pressure at the outlet, the more efficiently the unit handles with chronic and stubborn contaminants. On the other hand, strong pressure requires high engine power, which affects the dimensions, weight and price of the device — despite the fact that not every dirt requires such pressure, and excessively intensive washing can damage the surface to be treated. Thus, the pressure is chosen by manufacturers in accordance with the general class of the miniwash. Thus, values up to 100 bar are found in the most compact and low-power domestic models (see "Type"). A pressure of 100 – 125 bar is considered relatively low for household sinks, and most of these models are in the range of 125 – 150 bar — this is most often quite enough, taking into account the characteristics of the application. For professional units, the average is considered to be 150 – 175 barhowever, there are many models that give out more than 175 bar.

Power of the pressure washer motor expressed in watts. Such a designation nowadays is generally accepted for all types of engines; it is quite possible to compare electric and gasoline / diesel units with each other. At the same time, for sinks with internal combustion engines, power in horsepower can also be specified (see above), but most often it is indicated as an addition to watts.

The higher the engine power, the greater the performance and pressure can be achieved at the outlet of the miniwash. On the other hand, this parameter directly affects the cost, as well as fuel / electricity consumption. In addition, in some situations, high power is unnecessary — for example, a delicate surface can be damaged by strong pressure. So when choosing, it is worth considering specific tasks, and not chasing the maximum possible power.

Detailed recommendations on this matter for different cases can be found in special sources. Also note here that most household models (see "Type") have a power of up to 2 kW ( battery units — most often up to 100 W, although there are exceptions). 2 – 3 kW are considered a fairly solid indicator for household sinks, and values \u200b\u200bmore than 3 kW are already found mainly among professional models. Professional equipment, however, is also low-power ( up to 2 kW), but there are few such dev...ices — in general, the power of such units is quite high, in a fairly large number of models it exceeds 4 kW.

Water consumption characterizes productivity, that is, the amount of water that the unit can supply to the nozzle per hour. In most models, performance can be adjusted; for such cases, the characteristics indicate the flow rate at maximum power.

Higher performance allows you to better handle large volumes of work and stubborn dirt, but requires adequate power — and this, in turn, affects the size, price and electricity / fuel consumption. So it is worth choosing according to this parameter, taking into account the features of the planned application. If we talk about specific numbers, then low-capacity washes include models with a rate of up to 350 L / h, which are designed for simple tasks like cleaning windows in a private house, a small car or smaller equipment like bicycles. The unit with a flow rate of 350 – 500 L / h is perfect for washing cars and other similar tasks; if you have to deal with a large car like an SUV, you should pay attention to more performant options — up to 600 L / h. A capacity of 600 L/h or more makes it possible to classify the sink as a professional level, and values of 1000 L/h or more are typical for the most powerful and advanced models that can handle almost any task.

— Universal 3 in 1. Multifunctional nozzle capable of operating in 3 modes and having the ability to quickly switch between them; in some models, this can be done right in the process, although this possibility should be clarified in advance. The specific functionality of such a device also needs to be clarified separately: it can be different for different manufacturers (and even in different models of the same manufacturer). However, as a rule, the universal nozzle covers the most basic washing functions, such as spot jet, mud blaster (see below) and gentle mist spray mode.

- Fan. In accordance with the name, this type of nozzle produces a "fan" during operation - a flat jet expanding from the nozzle. This jet is well suited for treating large areas. In addition, by changing the distance from the nozzle to the surface to be treated, it is possible to regulate the intensity of exposure and the width of coverage within certain limits. So, bringing the nozzle almost close, you can get a very powerful effect on a small area; when removed, the coverage will expand, and the intensity will decrease.

- Dot. Nozzle that forms a thin and narrow jet. It is intended mainly for processing hard-to-reach places and small surfaces, as well as "precise work" - for example, if you need to carefully walk along a certain area, avoiding water getting beyond its edges as mu...ch as possible. Also note that the spot nozzle provides a fairly intense impact, so it can to some extent replace the mud blaster (see below) - for example, on delicate surfaces, where the jet from the burr can damage the coating.

- Mud. A specialized nozzle designed to remove dirt, including hard and old. It is also known as a “mud cutter”, which quite accurately describes the features of its work: the design has a special rotary nozzle, thanks to which the water jet rotates and effectively “cuts off” even fairly dense deposits. At the same time, it should be borne in mind that such an impact is quite intense, it can also harm the treated surface itself - in particular, there are known cases of damage to the paint on the car body due to too long and intensive use of the mud cutter. So you need to work with such a nozzle carefully and "without fanaticism."

- Corner. Bent-shaped nozzle: the flow of water leaving the nozzle is directed at an angle (usually straight or almost straight) relative to the hose. And in some models, the nozzle is mounted on a hinge and the angle of its location can be changed within certain limits. Whatever the case, the angled design makes it easy to reach a variety of hard-to-reach places that are hard to reach with traditional straight nozzles. The specific shape of the jet can theoretically be different, but in practice it is most often a "point" or "fan" (see above).

- Foam gun. Nozzle designed for washing with foam. Foam increases the efficiency of removing dirt, this method is popular, in particular, when washing cars and motorcycles. The nozzle itself has its own container, into which the detergent is poured, and a special nozzle shape that promotes foaming. An alternative to the foam gun can be your own foam container provided in the sink; see below about it, here we note that a specialized nozzle is rather bulky, however, it provides high quality foam, which cannot always be achieved when using a built-in tank, and can be used regardless of whether the sink has its own foam tank.

- Washing brush. A nozzle with a working part in the form of a brush, designed in such a way that during the operation of the unit, water enters the bristles of such a brush. Such nozzles are very convenient for contact washing: they eliminate the need for separate brushes, and are much more efficient and convenient.

- Rotating brush. A variation of the brush described above, supplemented by a special drive, due to which the working part with bristles rotates during use. Such a drive usually works due to the water pressure supplied to the nozzle. Such devices are more effective than classic brushes, they are more convenient and easier to use, but they are much more expensive.

- Patio nozzle. A special type of nozzles for washing large flat surfaces - mostly outdoor (garden paths, sidewalks, floors on the porch or terrace, etc.; often also walls). Such a nozzle has a characteristic round shape, and functionally it combines the capabilities of a high-pressure jet and a brush. The brush is located around the circumference of the product, and inside this ring is a design like a garden sprinkler, equipped with several nozzles. During operation, these nozzles move in a circle, intensively processing the surface under them; and the brush not only promotes effective cleaning, but also prevents splashing. Most Patio nozzles are as effective as more traditional fan models, providing not only minimal spray, but also more coverage.

— Number of replaceable nozzles. The total number of replacement nozzles (nozzles) supplied with the sink. Recall that the strength, thickness and shape of the jet issued by the unit depends on the configuration of the nozzle. However, it should be borne in mind that this parameter may correlate differently with the total number of washing functions. For example, in one car wash, three complete nozzles can each be responsible for their function (option: fan, spot nozzle, mud nozzle), in another model it can be three versions of the same function (say, fan spray at 3 different angles), and in the third device, on the contrary, one of the nozzles can be universal (see above), and the total number of functions will be more than 3. Such details should be clarified according to the manufacturer's documentation. However, in general, a larger number of complete nozzles, as a rule, means a more extensive set of operating modes.

— Hose for pipe cleaning. This accessory is intended for cleaning sewer and drainpipes from plaque, small debris, grease and other deposits. As a rule, such hoses are flexible and have a small outer size that allows them to overcome pipe bends; they are also often reinforced with steel cord. Under water pressure, the nozzle with the hose is sucked into the pipe and cleans it well. The nozzle jet configuration is typically cone shaped with flows in different directions.

— Pressure adjustment. Possibility of adjusting the output pressure - the intensity of the water jet. Choosing the optimal pressure force allows you to effectively use the sink to clean various types of surfaces. So, for more delicate surfaces such as car body or painted walls, you can set the pressure level to a low level in order to avoid damage to sensitive surfaces. And for durable materials such as concrete paths or stone walls, it is preferable to use higher pressure - thereby effectively removing stubborn contaminants.

- Vacuum cleaner. The sink can be used as a traditional vacuum cleaner to collect dust and small debris. Moreover, many models with this function also have a blower mode, which allows you to use a stream of air not to draw in, but to sweep away contaminants; this can be important, for example, when clearing a lawn or garden path of fallen leaves. In any case, a vacuum cleaner makes it possible to first remove excess dirt from the surface that it would be undesirable to wash away with a powerful stream of water. On the other hand, such equipment significantly affects the price, weight and dimensions of the entire sink - despite the fact that it is not required so often (and even in cases where it is required, it can be easier and more reasonable to use a traditional vacuum cleaner). Therefore, very few sinks with this function are produced.

...- Drum. The presence of a drum (reel) for a high-pressure hose in a mini-washer provides additional convenience not only in storage/transportation, but also during operation: the hose can be easily unwound before starting work and reeled in at the end, and the actual length of the hose can be adjusted by simply unwinding the required amount from the drum.

— Wheels for transportation. Such wheels are especially useful given the fact that modern mini-washes (especially powerful and productive ones) can be quite heavy and bulky. Most often, the design provides for one pair of wheels - thus, in a vertical position, the support on the opposite side of the body acts as a parking brake, and to move the unit you need to tilt it slightly.

— Taking water from the tank. A function that allows the mini-wash to use water from open containers - a bucket, barrel, tank, or even a natural body of water such as a pond or river. Taking water from a container can be a real lifesaver if there is no running water nearby or it is impossible to connect to it.

- Container for water. The sink has its own water tank. As a result, the unit does not depend on the water supply or external water containers; its mobility is limited only by the power cord (and battery-powered models are generally completely autonomous). On the other hand, your own tank significantly affects the dimensions and weight, and the need for it arises relatively rarely - even in the absence of running water, it is more convenient to use an external container.

— Water heating. Hot water is better at removing many contaminants than cold water; In addition, in winter it is also useful for melting ice. But not all sinks can boast a connection to hot water, which is why built-in heating systems are provided. Most often, a furnace running on liquid fuel is responsible for heating, even if the sink itself runs on electricity.

— Container for chemicals (foam). This function should not be confused with a foam generator attachment (see “Attachments”): the foam container is a separate tank for collecting detergent and can be used in combination with any attachment - for example, a brush or dirt cutter. On the other hand, the quality of the foam is somewhat lower than when using a separate foam generator.

— Collection of chemicals from the container. The presence of a foam generator in the design of the sink, which allows you to make foam with any nozzle (as in the paragraph “Container for chemicals” described above). The key difference is the absence of a tank, and a tube for collecting chemicals is removed from the device.

— Water filter. The presence of a water filter in the design of the mini-wash. In some models, the filtration system may be multi-stage. Specific details for each model must be clarified separately. However, in any case, it is worth keeping in mind that the filtration system affects the cost of the unit and requires regular maintenance: filters need to be cleaned from time to time, and sometimes replaced.

— Built-in pressure gauge. This function is found mainly in powerful professional solutions. The pressure gauge allows you to carefully control the pressure, selecting it depending on the current tasks; This is especially true when processing delicate surfaces that can be damaged by excessively high pressure.

- Overheat protection. A safety system that protects the mini washer motor from heat that can lead to damage. When the critical temperature is reached, the engine automatically turns off; You can start the device again only after it has cooled down sufficiently and the overheating protection has not tripped.

— Water cooling of the engine. Units with such a cooling system use water to remove heat from the electric motor. It is pumped directly around the hot components of the power unit, thereby ensuring effective heat absorption. Washers with an engine water cooling system can be used in long-term and continuous operation without the risk of motor overheating.

Power supply for the sink. The type of engine installed in the unit, as well as some features of its application, directly depends on this.

All modern high-pressure washers according to this indicator can be divided primarily into two categories - electric and with an internal combustion engine (ICE). At the same time, the first option is generally much more popular: electric motors are more compact and lighter than internal combustion engines, simpler and cheaper both in design and in operation/maintenance, moreover, they have a lower noise level and do not create exhaust gases during operation. But a specific power source for electric washers can be a 230 V or 400 V power supply, a 12 V car lighter, and a battery. In turn, internal combustion engines can be gasoline or diesel. Let's look at all these options in more detail:

— Electrical network 230 V. The most popular option nowadays: 230 V mains are ubiquitous, and most modern high-pressure washers are not particularly “gluttonous”, which allows them to be connected to ordinary outlets. The only exceptions are the most powerful models - 3.5 kW and above: they may require a special connection (directly to the panel). However, in any case, when powered from the mains, the operating time is practically unlim...ited; The washers themselves are much lighter and cheaper than battery-powered models with similar characteristics; and finding a 230 V power source is much easier than 400 V. The noticeable disadvantages of this option include the dependence on sockets and the presence of a power cord, which limits mobility; however, for high-pressure washers, these points are not so often significant.

— Electrical network 400 V. Power supply from three-phase 400 V networks is used mainly in heavy units with a power of 3400 W and above - that is, in tech models for which connection to a regular outlet is no longer suitable. Some similar units operate on 230 V (connected directly to the panel); however, three-phase power has a number of advantages over this connection format. Firstly, 400 V networks can better withstand high loads; secondly, they allow more accurate accounting of actually consumed electricity. On the other hand, the possibility of such a connection itself is less common than 230 V; therefore, before purchasing a unit from this category, it would not hurt to check the availability of a three-phase connection at the intended place of work.

— Cigarette lighter 12 V. Power supply from the vehicle’s on-board 12 V network through the cigarette lighter socket or a car socket of a similar format. The power of such power does not exceed 300 W, and sometimes it can be even lower; so all models in this category are lightweight, compact and low-power units. For an ordinary car owner who wants to keep his car clean, such a unit can be an excellent alternative to a bucket and a rag - especially since the connection to the cigarette lighter makes the car wash independent of stationary outlets. On the other hand, such sinks are poorly suited for more serious tasks, or even not suitable at all.

- Battery. Sinks with this type of power supply do not depend on electrical networks and can work even in the absence of sockets nearby. Car washes with internal combustion engines have similar capabilities (see below); however, battery-powered models are noticeably simpler, cheaper, lighter, quieter and “cleaner” (in terms of the absence of exhaust gases). But the power of this type of sink is generally low - it does not exceed 2 kW, and in many models it does not even reach 200 W. It is also worth noting that units with batteries are heavier, bulkier and more expensive than models with similar characteristics with mains power. And when the charge is depleted, you will still need to connect to the network to replenish the energy supply. The latter, however, is partly compensated by the fact that the batteries in most battery washers are removable and allow for quick replacement (for more details, see “Included battery”)
We also note that some devices in this category may come without a battery at all. Typically these are units designed for a specific standard battery platform; about it, see below, but here we note that this configuration allows you to choose a battery at your discretion - or not overpay for it if a compatible battery is already on the household.

— ICE. All internal combustion engines have common features. On the one hand, units with internal combustion engines are as autonomous and mobile as possible: they do not depend on electrical networks, continuous operation time is limited only by the amount of fuel in the tank, and refueling takes a minimum of time. At the same time, the power of most of these models is quite high - from 4 kW and above. On the other hand, the engines themselves are noisy, complex and expensive; fuel for them is also much more expensive than electricity; and the exhaust gases generated during operation create discomfort and limit use in enclosed spaces. Therefore, in general, it makes sense to pay attention to ICE sinks in cases where autonomy combined with high power and performance clearly outweigh the described disadvantages. As for the features of specific types of internal combustion engines, they are as follows:

• Gasoline. The most popular variety nowadays: gasoline engines are noticeably simpler than diesel engines, both in design and in operation. True, it is more difficult to achieve high torque in them than in diesel engines, and gasoline usually costs more than diesel fuel. At the same time, the first point is not of decisive importance for mini-washes, and the second is compensated by the described advantages.
• Diesel. Diesel engines provide high torque at low speeds, and their fuel costs less than gasoline. At the same time, such units are noticeably heavier and more expensive, moreover, they often require specific maintenance and are generally more difficult to operate. As a result, few diesel washers are produced - mostly these are devices with high power and performance: it is in such cases that the described advantages often (though not always) outweigh the disadvantages.

The highest level of noise emitted by the minisink when operating in normal mode. The lower this indicator, the more comfortable the device is to use, the easier it is to use it without special hearing protection; and from certain noise levels the use of protection is mandatory (more on this below). All this is especially true in light of the fact that mini-sinks are quite noisy equipment — even the quietest of these units give out about 60 dB, which is comparable to talking in raised tones at a distance of about 1 m. In the noisiest models, this figure reaches 108 dB — this is comparable to a tractor engine at a distance of the same 1 m.

Recall that the decibel is a non-linear quantity, and it is best to evaluate specific values using comparative tables. Such tables can be found in special sources. Here we note that according to European sanitary standards, noise of 85 dB is allowed to be heard without protective equipment for 8 hours, 91 dB — 2 hours, 97 dB — half an hour, and 103 dB — only 7 minutes. So when choosing a unit, you should take into account the duration of work with it — with high noise, you may need protective headphones.