RU37805U1 - DEVICE OF WINTER START OF SPLIT SYSTEM OF AIR CONDITIONING OF AIR - Google Patents

Description

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Split winter start device - air conditioning systems

The utility model relates to air conditioning, designed to create the required temperature and humidity in the premises, in particular to automatic control systems for the operation of the air conditioner.

The operating temperature range of the outdoor air is one of the most important parameters of the split air conditioning system. For most regions of Russia, the lower limit of the range provided by the manufacturer is too high. Moreover, in some cases, customers would prefer to have a wider range of external temperatures when working on heating, and in others on cooling.

Already known device winter start split - air conditioning systems (see RF patent No. 2079795 C1. Publ. 05.20.1997).

The disadvantages of the known winter start-up device for split-air conditioning systems are the inability to ensure safe start-up and optimal operation of the latter at low ambient temperatures (up to -25 C), which entails a decrease in the reliability and performance of the split-system.

The well-known split-systems, at low temperatures, are hindered by the following factors:

- reduction of condensation pressure, as a result, the flow rate of the liquid refrigerant through the throttling device decreases and the overheating zone in the evaporator of the indoor unit increases and as a result, the cooling capacity of the system decreases, the evaporator freezes and the compressor overheats.

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-condensation of the refrigerant in the coldest parts of the hydraulic circuit: condenser, compressor and liquid separator. The refrigerant, as a denser liquid, is located at the bottom of the crankcase and, accordingly, when starting the compressor, liquid refrigerant will be supplied instead of oil. It, being a good solvent, will wash off oil residues from rubbing surfaces.

- a sharp drop in pressure when starting the compressor and rapid boiling of liquid refrigerant, leading to foaming of the oil and its outflow from the compressor to the track.

-increasing the time to reach the required operating pressure in the condenser.

The objective of the claimed utility model is aimed at improving the reliability and performance of the split system, by ensuring the safe start and optimal operation at low ambient temperatures (up to -25 C) of the latter. In addition, the objective of the claimed utility model is aimed at unifying the installation through the use of microprocessor technology, which allows it to be used for any air conditioning split systems, and ease of installation due to the removal of polymer material in the housing and placement of the split unit system anywhere, and also by connecting the installation “to the interconnect cable break, which does not require the introduction of a split system into the electronics.

The objective of the claimed utility model is achieved due to the fact that the winter start-up device of a split air conditioning system comprising a controller located inside an external block of a split system, at least one electric heater of the crankcase of a split compressor system made with a mounting device, first and second temperature sensors made with heat insulators. moreover, the block controller is connected to the electric power supply unit with an automatic fuse, the first temperature sensor is installed on the compressor crankcase, the second temperature sensor is installed on the radiator of the external unit, the temperature sensors and the heater are electrically connected to the block controller, the block controller is connected to the gap of the split-unit interconnect cable.

The block controller can be made in a housing made of polymer material.

The fastening devices of the second temperature sensor and heater can be made in the form of clamps.

The heater can be fixed at the bottom of the crankcase.

The block controller can be implemented on a double-sided printed circuit board, with voluminous output parts installed on the upper side of the board, and SMD components located on the lower side. SMD components - radio mounting parts installed and soldered by robotic complexes. These components differ from other radio components in the absence of “flexible leads for installation.”

In FIG. 1 shows the appearance of the block controller,

In FIG. 2 shows a diagram of connecting a device to a split system.

On Fig.3 presents a diagram of the installation of the first temperature sensor and heater.

Figure 4 presents the installation diagram of the second temperature sensor 4.

A winter start device for a split - air conditioning system contains a block controller 1 located inside an external block of a split - system, at least one electric heater 2 of the split compressor housing - a system made with a mounting device, the first and second temperature sensors 3 and 4, made with heat insulators 5. The block controller 1 is connected to the power supply unit through an automatic fuse. The first temperature sensor 3 is installed on the compressor crankcase. The second temperature sensor 4 is installed on the radiator of the external unit. The temperature sensors 3 and 4 and the heater 2 are electrically connected to the block controller 1. The block controller 1 is connected to the gap of the interconnect cable of the split system. Block - controller 1 can be made in the housing of a polymeric material. Devices

x-ffi // OV fastenings of the second temperature sensor 4 and heater 2 can be made in the form of clamps 6.

The block controller 1 can be implemented on a double-sided printed circuit board, and on the upper side of the board volume output parts can be installed, and on the lower side there are SMD components.

The sequence of installation of the winter start device on the split - system:

The protective cover will be removed from the external unit of the split system. Then, inside the external block is placed and fixed the block controller 1. The terminal block of the external block is connected by jumpers with the corresponding blocks of the block controller 1. (Fig.2). Install and fix the electric heater 2 of the crankcase in the lower part of the crankcase (Fig. 3). Next, install the temperature sensor 3 on the crankcase (Fig. 3), and heat insulate with the heater 6. Install the sensor 4 on the radiator of the external unit (Fig. 4) and heat insulate the temperature sensor 4.

Connect the wires of the temperature sensors and heater to the block controller 1 in accordance with (Fig. 2). An interblock cable is connected to both the block controller 1 and the power supply wires (230 V - 50 Ng) to the block controller 1 from a separate machine (Fig. 2.) The protective cover of the air conditioner is installed.

The device performs the following main functions:

1. Blocking the start of a cooled compressor at low temperatures (below - 3 ° C)

2. Compressor heater control, up to 600 W

3.Heater control of liquid separator, up to 100 W

4.Drainage heater control, up to 100W

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4 n 6. Tracking the operation mode of the air conditioner (heat-cold) 7. Regulation of the fan speed of the outdoor unit when the air condition is cold Assignment of the outputs of the block controller (figure 2). L (N) (t) - "line or" ground from the indoor unit PE (t) - grounding Y (in) -oT of the indoor unit to the compressor 1 (in) -oT of the indoor unit to fan 2 (in) - from the indoor unit to the valve 220- power supply of the block controller (220 V, 50 Hz) L (N) (out) - - “line or“ ground to the external unit PE (out) - grounding Y (out) - to the compressor of the external unit 1 ( out) - to the fan of the external unit 2 (out) -K to the valve (warm-cold) of the external unit D - jumper of the operating mode (warm-cold) T (о) - thermal switch of the system (option) or jumper R (o) - terminals for connecting the drainage heater

Rl- terminals for connecting the crankcase heater and heating of the expansion tank T1- terminals for connecting the first temperature sensor 3 T2- terminals for connecting the second temperature sensor 4

Claims (5)

1. A winter start-up device for an split air conditioning system, comprising a controller located inside the external unit of the split system, at least one electric heater of the compressor housing of the split system, made with a fastening device, the first and second temperature sensors made with heat insulators moreover, the controller block is connected to the electric power supply unit through an automatic fuse, the first temperature sensor is installed on the compressor crankcase, the second temperature sensor is installed on the radiator of the external unit a, heater and temperature sensors are electrically connected with a flow controller, a flow controller connected to the gap interconnect split system. 2. The device according to claim 1, characterized in that the block controller is made in a housing made of a polymer material. 3. The device according to claim 1, characterized in that the fastening devices of the second temperature sensor and heater are made in the form of clamps. 4. The device according to claim 1, characterized in that the block controller is implemented on a double-sided printed circuit board, with voluminous output parts installed on the upper side of the board, and SMD components located on the lower side. 5. The device according to claim 1, characterized in that the heater is fixed in the lower part of the crankcase.