RU201107U1 - Air conditioning device - Google Patents

Abstract

The utility model relates to the field of air conditioning and can be used for the purposes of periodic washing and disinfection of the heat exchanger and drain pan of fan coil units and indoor units of air conditioners. The air conditioning device contains a housing, a fan, a heat exchanger, a drain pan, a module for periodic flushing of the heat exchanger and a drain pan, containing liquid atomizers. The module for periodic flushing of the heat exchanger and the drain pan is made in the form of a main collector installed along the width of the heat exchanger, distribution pipes connected to the main collector and installed along the length of the heat exchanger, and liquid sprayers located on the distribution pipes, and the module is installed on one side of the heat exchanger, and the collector inlet is led out of the device body. The technical result of the utility model is to increase the efficiency of washing and disinfecting the heat exchanger and the drain pan without the need for access to the surfaces to be cleaned. 3 C.p. f-ly, 2 dwg

Description

The field of technology.

The utility model relates to the field of air conditioning, and can be used for the purposes of periodic washing and disinfection of the heat exchanger and the drainage sub-zone of fan coil units and indoor units of air conditioners.

Prior art

To ensure sufficient heat exchange, the air conditioner heat exchanger fin is constructed of compact multi-layer parts, and the gap between the parts is only 1-2 mm, and various recesses and slots are made on the heat exchanger fins to increase the heat exchange area. During the operation of the air conditioner, a large volume of air circulates, dust and other impurities from the air settle on the heat exchanger, which not only affects the efficiency of the heat exchanger, but also promotes the growth of bacteria, which affects the health of the user. Therefore, the heat exchangers of air conditioners must be cleaned periodically. However, cleaning the heat exchanger requires a lot of time and a significant amount of work, since at least partial disassembly of the fan coil housing or the indoor unit of the air conditioner is required. The following analogs are aimed at solving this problem.

A known method for self-cleaning the heat exchanger of an air conditioner, according to which the following operations are carried out:

air conditioner control to switch to self-cleaning mode;

measuring an ambient temperature of the heat exchanger to be cleaned, and determining, according to the measured ambient temperature, a target vaporization temperature of the heat exchanger to be cleaned;

adjusting, in accordance with the target evaporation temperature and the actual evaporation temperature for the heat exchanger to be cleaned, the evaporating temperature for the heat exchanger to be cleaned, and controlling the frost formation of the heat exchanger to be cleaned; and

- after the surface of the heat exchanger to be cleaned is covered with a layer of frost or ice, control of the air conditioner to switch to defrosting mode of the heat exchanger to be cleaned (W02018086176, IPC: F24F11 / 00, publ. 17.05.2018).

This method has the following disadvantages:

the necessary disinfection and chemical loosening of dirt on the surface of the heat exchanger is not provided;

In most cases this method cannot be used for fan coil units, because the temperature of the coolant (water or glycol solution) at the inlet and outlet is greater than 0 ° C.

Known air conditioner in which the outer surface of the ribs

The heat exchanger and the heat transfer pipe are equipped with a magnetostrictive coating that vibrates in an alternating magnetic field. Thus, in an alternating magnetic field, the size of the magnetostrictive material changes in each direction, that is, the size is lengthened or shortened, causing vibration of the magnetostrictive coating, thereby causing spontaneous vibration of the fins and condensation tube, and removing contaminants on the heat exchanger (CN109556323, IPC: F25B39 / 00; F28G15 / 00, publ. 02.04.2018).

This analog has the following disadvantages:

the necessary disinfection and chemical loosening of dirt on the surface of the heat exchanger is not provided;

the need to manufacture a heat exchanger with a magnetostrictive coating and the presence in the design of a device for generating a magnetic field not only increases the cost of manufacturing a heat exchanger, but also requires a special technology for its production.

As a prototype of the proposed utility model, we have chosen an air conditioner with a cleaning device for a heat exchanger. A sensor is installed outside the heat exchanger to determine the amount of dust around the heat exchanger. A cleaning element for spraying water is installed on one side of the heat exchanger. The control unit receives signals from the sensor and compares the reference dust amount with the detected dust amount. The control unit controls the cleaning element to spray water into the heat exchanger if the detected amount is greater than the reference amount. At the same time, condensate is collected and the stock is replenished with the required amount of raw water, its part is ionized by electrolysis, and at first ionized water for disinfection is injected under pressure onto the heat exchanger, and then non-ionized water is injected under pressure for rinsing (KR20040077338, IPC: F24F3 / 16 , publ. 04.09.2004).

Significant disadvantages of the prototype include the complexity of the cleaning and disinfection system, the need to supply a direct current source, as well as the fact that the necessary loosening of dirt on the surface of the heat exchanger is not provided, since the disinfection of the heat exchanger is carried out using ionized water, which does not imply chemical destruction of dirt on the surface of the heat exchanger.

Disclosure of the utility model.

The task of the utility model is to simplify the device, increase efficiency and facilitate the cleaning and disinfection of the heat exchanger and the drain pan. The technical result of the proposed utility model is the creation of a module for periodic flushing of the heat exchanger and drain pan (hereinafter referred to as the Module), which can be either completed in the production of fan coil units and indoor units of air conditioners, or manufactured and installed on existing indoor units of air conditioners and fan coils, and which allows carry out effective flushing and disinfection of the heat exchanger and the drain pan without the need for access to the surfaces to be cleaned, which greatly facilitates and makes it easy to perform flushing and disinfection work.

The technical result is also achieved by the fact that the collector inlet can have both a common point and separate points of connection for the supply of flushing liquid and water, while the connection point for the supply of flushing liquid and water can be equipped with pipeline fittings.

Brief description of graphic materials.

Figure 1 shows a schematic diagram of the proposed device (the diagram is shown for a fan coil or indoor unit of a duct-type air conditioner, however, the diagram is also applicable for fan coil units and indoor units of air conditioners of any type).

Figure 2 shows an axonometric diagram of a module for periodically flushing and disinfecting a heat exchanger and a drain pan.

Implementation of the utility model.

The main components of any fan coil or indoor unit of an air conditioner are the case (1), the fan (2), the air filter (3), the heat exchanger (4), the drain pan (5), from which the drainage is removed through the drain connection (6).

The module, which is proposed to complete the manufactured and existing indoor units of air conditioners and fan coil units, contains (basic configuration) a manifold (7), distribution pipes (8), liquid sprays (9), a connection point for flushing liquid and water supply (10).

The length and number of distribution pipes, as well as the number of liquid sprays, depending on the size of the heat exchanger, are chosen so that during flushing and disinfection, the supplied flushing liquid and water completely cover the surface of the heat exchanger.

The module for periodic flushing of the heat exchanger and drain pan works as follows.

First, from the connection point of the flushing fluid and water supply (10), using a hand pump or similar equipment, flushing fluid is supplied in the required amount, depending on the size of the heat exchanger. From the connection point of the flushing liquid and water supply (10), the flushing liquid passing through the manifold (7) enters the distribution pipes (8), where, passing through the liquid nozzles (9), it settles on the heat exchanger. After the time required for disinfection, chemical destruction and loosening of the dirt has passed, from point (10), using a hand pump or similar equipment, or from another source of water supply, water is supplied in the required amount, depending on the size, to remove dirt and flushing liquid heat exchanger. From point (10), water, passing through the collector (7), enters the distribution pipes, where, passing through the liquid sprays (9), it is supplied to the heat exchanger (4), from where, rinsing the heat exchanger (4), water enters the drain pan. During the water supply, the mixture of water and flushing liquid passing through the drain pan (5) also rinses and disinfects it.

In one of the versions, a block of pipe fittings can be connected to the Module.

The following is a description and diagram of the proposed Module with a block of pipe fittings for a fan coil unit or an indoor unit of a duct-type air conditioner, however, the proposed Module can be used for fan coil units and indoor units of air conditioners of any type.

The valve block (11) consists of a water supply valve 12, behind which there is a water supply connection point (13), and a flushing liquid supply valve (14), behind which there is a flushing liquid supply connection point (15), which are connected to one pipe ... In this case, it becomes possible to connect the water connection point (13) to a permanent water supply source, which gives additional convenience when carrying out flushing and disinfection work.

The principle of operation of the Module equipped with a block of pipeline valves is as follows:

First, when the water supply valve (12) is closed, the flushing fluid supply valve (14) is opened and, through the flushing fluid connection point (15), using a hand pump or similar equipment, flushing fluid is supplied in the required amount, depending on the size heat exchanger, after which the flushing fluid supply valve (14) closes. From the connection point of the flushing liquid (15), the flushing liquid, passing through the manifold (7), enters the distribution pipes (8), where, passing through the liquid nozzles (9), it settles on the heat exchanger. After the time required for disinfection, chemical destruction and loosening of dirt has passed, when the flushing fluid supply valve (14) is closed, the water supply valve (12) opens, and, from a constant water supply source, and in its absence, using a hand pump or similar equipment, or another source of water supply, from the water connection point (13), to remove dirt and flushing liquid, water is supplied in the required amount, depending on the size of the heat exchanger. From the water connection point (13), water, passing through the collector (7), enters the distribution pipes (8), where, passing through the nozzles, the liquid is supplied to the heat exchanger, from where, by flushing the heat exchanger, the water enters the drain pan. During the water supply, the mixture of water and flushing liquid passing through the drain pan (5) also rinses and disinfects it.

The described schemes, at the discretion of the manufacturer of air conditioners and fan coil units, can be completed with additional fittings, as well as change the type of fittings. For instance:

Complete the module with the basic configuration with a shut-off valve at the connection point for the flushing liquid and water supply (10);

In a module with a block of pipeline valves, equip the flushing fluid supply valve (14) with a check valve;

In a module with a pipeline valve assembly, replace the flushing liquid supply valve (14) with a non-return valve;

Install a filter in the module with the valve block, behind the water supply tap (12).

The supply manifold (8) manifold (7) can be more than one in number.

An example of execution.

The proposed Module was assembled and tested on a ducted fan coil unit with a double row heat exchanger with dimensions of 300x250 mm. Behind the heat exchanger, at a distance of 35 mm from the surface, four distribution copper tubes with an outer diameter of 9.53 mm, a length of 260 mm, with a distance between the tube axes of 65 mm, were installed. Water sprays were installed on each tube, with a pitch of 75 mm. The distribution pipes were connected to a single copper manifold with an outer diameter of 22.2 mm.

The fan coil unit was in use and the heat exchanger was dirty and disinfection was required.

Through the manifold, by means of a manual pressure increasing device, a disinfectant solution of 30 ml was supplied. After 5 minutes had passed for disinfection, chemical destruction and loosening of the dirt, 300 ml of rinsing water was supplied through the manifold by means of a manual pressure increasing device at a pressure of 7 kPa. Opening the fan coil unit and analyzing the results showed that the entire surface of the heat exchanger and the drain pan was clean and free of pathogenic bacteria.

The utility model assumes to equip the produced and existing indoor units of air conditioners and fan coil units with a module for periodic flushing of their heat exchanger and drain pan. The proposed module makes it possible to periodically flush and disinfect the heat exchanger and the drain pan of the indoor units of air conditioners and fan coil units using a standard liquid cleaning and disinfection agent (hereinafter flushing liquid), without the need to access their heat exchanger and drain pan. The latter is more relevant for most cases when indoor units of air conditioners and fan coil units are mounted secretly (behind suspended ceilings, in wall niches, etc.). It is important to note that the Module allows efficient flushing and disinfection of the heat exchanger and the drain pan without the need for access to the surfaces to be cleaned, which greatly facilitates and makes it easy to perform flushing and disinfection work.

The proposed module has a basic configuration, to which, as an add-on, it is possible to connect an additional block of pipeline valves

The heat exchangers are cleaned and disinfected using standard disinfecting and detergent liquids.

Claims (4)

1. A device for air conditioning, containing a housing, a fan, a heat exchanger, a drain pan, a module for periodic flushing of the heat exchanger and drain pan, containing liquid sprayers, characterized in that the module for periodic flushing of the heat exchanger and drain pan is made in the form of a main manifold installed along the width of the heat exchanger, distribution pipes connected to the main header and installed along the length of the heat exchanger, and liquid sprayers located on the distribution pipes, the module being installed on one of the sides of the heat exchanger, and the collector inlet brought out beyond the device body. 2. The device according to claim 1, characterized in that the manifold inlet has a common connection point for the supply of flushing liquid and water. 3. The device according to claim 1, characterized in that the manifold inlet has separate connection points for the supply of flushing liquid and water. 4. A device according to any one of claims 2 and 3, characterized in that the connection point for the supply of flushing liquid and water is provided with pipeline fittings.

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