KR20180101781A - an outdoor unit of an air conditioner - Google Patents

Abstract

The present invention relates to an outdoor unit of an air conditioner. The outdoor unit of an air conditioner comprises: a casing; an outdoor heat exchanger installed in the casing; and a differential pressure measuring device measuring a differential pressure of air passing through the outdoor heat exchanger, wherein the differential pressure measuring device comprises: a first mouthpiece portion installed in the casing; a second mouthpiece portion installed at one side of the outdoor heat exchanger so as to measure the pressure of the air passed through the outdoor heat exchanger; and a differential pressure sensor measuring a differential pressure of the pressures measured from the first mouthpiece portion and the second mouthpiece portion. By using the present invention, a number of defrosting operation and operation time implemented in case of an occurrence of frost in the outdoor heat exchanger can be reduced.

Description

An outdoor unit of an air conditioner (an outdoor unit of an air conditioner)

The present invention relates to an outdoor unit of an air conditioner.

The air conditioner is an appliance for keeping the indoor air in the most suitable condition according to the purpose and purpose. For example, in the summer, the room is controlled in a cool air condition, while in winter, the room is warmed. In addition, the humidity of the room can be controlled and the air in the room can be controlled in a pleasant clean state.

In detail, the air conditioner is driven with a refrigeration cycle for compressing, condensing, expanding and evaporating the refrigerant, thereby performing the cooling or heating operation of the indoor space.

Such an air conditioner can be broadly divided into a separate type air conditioner separated from an indoor unit and an outdoor unit, and an integrated type air conditioner in which an indoor unit and an outdoor unit are installed together in a single cabinet. The indoor unit is provided with an indoor heat exchanger for exchanging heat with the indoor heat exchanger, and an outdoor heat exchanger for exchanging heat with outdoor air is disposed in the outdoor unit.

When the air conditioner performs cooling operation, the outdoor heat exchanger functions as a condenser, and the indoor heat exchanger functions as an evaporator. Further, when the air conditioner performs heating operation, the outdoor heat exchanger serves as an evaporator, and the indoor heat exchanger serves as a condenser.

On the other hand, when the air conditioner performs the heating operation, an impingement occurs on the surface of the outdoor heat exchanger functioning as an evaporator due to the relatively low outside air temperature.

Specifically, the surface temperature of the outdoor heat exchanger or the temperature of the refrigerant flowing through the outdoor heat exchanger must be lower than the outdoor temperature in order for the outdoor heat exchanger to absorb heat from the outside air.

At this time, when the surface temperature of the outdoor heat exchanger drops below the dew point temperature, condensed water is generated on the surface of the outdoor heat exchanger. In addition, when the surface temperature of the outdoor heat exchanger drops below a subzero temperature, the condensed water is frozen and congealing is generated on the surface of the outdoor heat exchanger.

If the surface of the outdoor heat exchanger is congealed, the flow resistance of the outdoor air passing through the outdoor heat exchanger is increased, and heat exchange is not generated in some outdoor heat exchangers. Accordingly, the heat exchange efficiency of the outdoor heat exchanger is lowered, and as a result, the efficiency of the air conditioner is deteriorated.

Therefore, when the conception of the outdoor heat exchanger has occurred, the defrosting operation is performed to remove the conception of the outdoor heat exchanger. However, since the defrosting operation shortens the heating continuous operation time, it is important to accurately measure whether or not the conception of the outdoor heat exchanger occurs.

Therefore, in order to measure whether or not the outdoor heat exchanger is frosted, the following prior arts have been conventionally disclosed.

(1) First Prior Art: Patent No. 10-0674180, Wind Pressure Defrosting Point Detection Apparatus for an Evaporative Heat Exchanger for an Air Conditioning Unit

(2) Second Prior Art: Patent No. 10-1589807, Heat Pump Cooler

However, according to this prior art document, there is a problem that the apparatus for inspecting whether or not an implantation has occurred on the surface of the outdoor heat exchanger is exposed to the outside, and is vulnerable to icing and moisture infiltration.

In addition, there is a problem that a large deviation occurs depending on the measurement position, and the internal structure is complicated, so that there is a high possibility that the shielding of the heat exchanger by foreign substances is mistakenly conceived.

Accordingly, the prior art fails to correctly measure whether or not the outdoor heat exchanger has been frosted, thereby reducing the heating performance of the air conditioner.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an outdoor unit of an air conditioner having an apparatus for accurately measuring whether or not the outdoor heat exchanger is frosted.

It is another object of the present invention to provide an outdoor unit of an air conditioner provided with a differential pressure measuring device provided inside the outdoor unit.

The outdoor unit of the air conditioner according to an embodiment of the present invention includes a casing, an outdoor heat exchanger installed inside the casing, and a differential pressure measuring device for measuring a differential pressure of air passing through the outdoor heat exchanger, A second hearth portion provided on one side of the outdoor heat exchanger for measuring a pressure of air that has passed through the outdoor heat exchanger and a second hearth portion provided on the inside of the casing, And a differential pressure sensor for measuring a differential pressure of the pressure measured by the differential pressure sensor.

The air conditioner may further include a blowing fan for forcedly convecting the outdoor air to heat-exchange the outdoor heat exchanger and the outdoor air, and a shroud disposed outside the blowing fan, wherein the first blowing part is installed outside the shroud.

The differential pressure sensor may be installed inside a control box disposed inside the casing.

The differential pressure measuring apparatus may further include a first hose connecting the first blow-off unit and the differential pressure sensor, and a second hose connecting the second blow-off unit and the differential pressure sensor.

The control box may include a through hole that is opened at one side so that the first hose and the second hose pass through.

The control box may include an extension extending toward the outdoor heat exchanger to fix the second hose.

Wherein the first and second tuyere parts are provided in a cylindrical shape having an internal space, and the first tuyere part and the second tuyere part are provided with an upper surface located on the upstream side of the air flow direction improvement, A lower surface positioned on the downstream side of the east enhancement, and a side connecting the upper surface and the lower surface.

The upper surface may be provided to close the inner space of the tongue portion, and the lower surface may be provided to communicate with the inner space of the tongue portion.

The tuyeres may further include at least one inlet formed on the side surface so as to communicate with the internal space.

The tuyere further includes a first guide and a second guide for guiding the flow of air to the inlet, and the inlet may be disposed between the first guide and the second guide.

The first guide and the second guide may be provided in the form of a claw formed at a predetermined angle along the periphery of the spout.

In the outdoor unit of the air conditioner according to the embodiment of the present invention, the following effects can be expected.

According to the embodiment of the present invention, the differential pressure of the air passing through the outdoor heat exchanger can be calculated to determine whether or not the outdoor heat exchanger is frosted.

Further, it is possible to more accurately determine whether or not the outdoor heat exchanger is frosted according to the temperature and the pressure difference, by further using information about the temperature of the outdoor heat exchanger.

Accordingly, the number of defrosting operations and the operation time of the outdoor heat exchanger can be shortened, and the heating duration and heating efficiency of the air conditioner can be increased.

Further, since the differential pressure measuring device for calculating the differential pressure of the outdoor heat exchanger is installed in the indoor unit, it is possible to prevent freezing and moisture infiltration which are caused by exposure to the outside.

1 is a view showing an outdoor unit of an air conditioner according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of an external appearance of an outdoor unit of an air conditioner according to an embodiment of the present invention. Referring to FIG.
3 is a top view illustrating the inside of an outdoor unit of an air conditioner according to an embodiment of the present invention.
4 is a perspective view illustrating the inside of an outdoor unit of an air conditioner according to an embodiment of the present invention.
5 is a view showing a control box of an outdoor unit of an air conditioner and a differential pressure measuring apparatus according to an embodiment of the present invention.
6 is a view illustrating an apparatus for measuring a differential pressure of an outdoor unit of an air conditioner according to an embodiment of the present invention.
FIG. 7 and FIG. 8 are views showing a boiling portion of an apparatus for measuring a differential pressure of an outdoor unit of an air conditioner according to an embodiment of the present invention.
9 is a view showing the flow of air in the spout of the apparatus for measuring the differential pressure of an outdoor unit of an air conditioner according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

FIG. 1 is a view illustrating an outdoor unit of an air conditioner according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of an external configuration of an outdoor unit of an air conditioner according to an embodiment of the present invention. And FIG. 3 is a top view illustrating the inside of an outdoor unit of an air conditioner according to an embodiment of the present invention.

As shown in the drawings, an air conditioner according to an embodiment of the present invention includes an outdoor unit 1 disposed outdoors, an indoor unit (not shown) connected to the outdoor unit 1 through a refrigerant pipe, . The indoor unit includes an indoor heat exchanger (not shown) for heat exchange with air in the indoor space.

The outdoor unit (1) is provided with a casing which forms an overall appearance. The casing includes a top cover 10, an outboard panel 30, a base pan 40, and a side supporter 20.

The top cover 10 is provided on an upper surface of the outdoor unit 1 to form an upper surface of the outdoor unit 1. A pair of the discharge ports 11 are formed in the top cover 10, So that the heat-exchanged air inside the outdoor unit (1) can be discharged to the outside of the outdoor unit (1). The discharge port 11 is equipped with a discharge grill 12 to prevent foreign substances from entering the discharge port 11.

Meanwhile, side supporters 20 are provided at four corners of the outdoor unit 1. The side supporter 20 may be bent to form a corner of the outdoor unit 1 by connecting the top cover 10 and the base pan 40 and may be formed in a pipe shape . An outboard panel 30 is provided between the side supporters 20 to form a circumferential outer surface of the outdoor unit 1.

The side supporters 20 may form a space between the outboard panels 30 connected to the side supporter 20 and form an inclined surface between the outboard panels 30 so that the outdoor unit 1 The corner portion may be formed to have an inclined surface.

The outboard panel 30 includes a pair of side panels 31 forming left and right side surfaces of the outdoor unit 1, a front panel 34 forming a front surface of the outdoor unit 1, And a rear panel 32 that forms a rear surface of the rear panel 32. [

The side panel 31 forms a left side surface and a right side surface of the outdoor unit 1. The side panel 31 includes a pair of side supporters 20 and a pair of side supporters 20, As shown in Fig.

The upper portion of the side panel 31, that is, the area corresponding to the shroud 90 inside the outdoor unit 1 is shielded, and a plurality of suction holes 311 are formed in the remaining area except for the shielded area . The inlet 311 is constantly formed over the entire area where the outdoor heat exchanger 55 for heat exchange with the air to be sucked is located and guides the air sucked from the side to pass through the outdoor heat exchanger 55 .

Of course, the arrangement of the inlet 311 formed in the side panel 31 may vary according to the structure and arrangement of the outdoor heat exchanger 55, and the inlet 311 is connected to the outdoor heat exchanger 55 And the air that is shielded and sucked through the portion not corresponding to the outdoor heat exchanger (55) passes through the outdoor heat exchanger (55).

In addition, the side panels 31 are further provided at the left and right ends thereof with a side panel coupling portion 312 which is bent to be engaged with the side supporter 20. [ The side panel coupling portion 312 is folded inwardly at the extended portion of the outdoor unit 1 and then bent outward to have a structure capable of engaging with the coupling portion 223 of the side supporter 20.

The upper portion of the side panel 31, that is, the area corresponding to the shroud 90 inside the outdoor unit 1 is shielded, and a plurality of suction holes 311 are formed in the remaining area except for the shielded area .

The rear panel 32 is provided at a portion corresponding to a portion where the shroud 90 is positioned. A suction grille 33 is formed from the lower end of the rear panel 32 to the base pan 40. The suction grille 33 is provided in a lattice shape by a plurality of wires to form a plurality of suction ports 331. The suction grille 33 is formed to have a size corresponding to that of the outdoor heat exchanger 55 located on the rear surface of the outdoor unit 1. [ Accordingly, the suction grille 33 protects the outdoor heat exchanger 55 from external impacts or foreign matter, and allows the outdoor air to flow smoothly.

A plurality of front panels (34) are provided on the front surface of the outdoor unit (1). The front panel 34 may include a service panel 35, a piping panel 36, and a suction panel 37.

In detail, the front surface of the outdoor unit 1 is divided into left and right sides with respect to a point where the outdoor heat exchanger 55 extends. That is, the service panel 35 and the piping panel 36 are provided on the left side of the outdoor unit 1, and the suction panel 37 is provided on the right side of the outdoor unit 1.

The service panel 35 is disposed at the left end of the outdoor unit 1 at a position corresponding to the extended end of the outdoor heat exchanger 55. The service panel 35 is configured to be detachable independently in a state in which all of the front panels 34 are mounted. Accordingly, the service panel 35 is detachably installed so as to be able to access the internal components of the outdoor unit 1.

Particularly, when the service panel 35 is opened, the entire control box 56 can be exposed forward, and each of the components constituting the refrigeration cycle and the refrigerant pipe connecting them can be easily accessed.

The piping panel 36 is provided between the lower end of the service panel 35 and the base pan 40 for passing and fixing the indoor unit connecting pipe connecting the outdoor unit 1 and the indoor unit. The pipe panel 36 is formed to have the same width as the service panel 35 and the service panel 35 is detached in a state where the pipe panel 36 is fixed to the base pan 40 Respectively.

The piping panel 36 is provided with a piping installation hole 361 through which a plurality of indoor unit connection piping can be connected to the indoor unit. A service valve is provided in the pipe installation hole 361 to facilitate connection and installation of the indoor unit connection pipe connected to the indoor unit. The piping panel 36 may be integrally formed with the service panel 35 as required.

The suction panel 37 forms the remaining front surface of the outdoor unit 1 except for the service panel 35 and the piping panel 36. The suction panel 37 extends from the top cover 10 to the base pan 40 and extends from the side supporter 20 to the service panel 35 and the piping panel 36.

The suction panel 37 may extend to an end of the outdoor heat exchanger 55 and may be disposed inside the outdoor unit 1 and may have the coupling plate 57 fixed to the end of the outdoor heat exchanger 55. [ And the end of the suction panel 37 are coupled to each other. Accordingly, the outdoor heat exchanger (55) can be stably fixed by the suction panel (37).

The suction panel 37 is also configured to shield the upper portion corresponding to the position of the shroud 90. A plurality of suction ports 371 are formed in the remaining area corresponding to the area of the outdoor heat exchanger 55, So that air can flow to the outdoor heat exchanger (55) side.

A front panel joining portion 341 is further formed at both left and right ends of each panel constituting the front panel 34 so as to be coupled with the side supporter 20 or another adjacent front panel 34 do. The front panel engaging portion 341 is bent outwardly from the end portion of the outdoor unit 1 after being bent to have a structure that can be engaged with the engaging portion 223 of the side supporter 20 .

On the other hand, the bottom surface of the outdoor unit (1) is formed by the base pan (40). The outdoor unit 1 may be supported by the base frame 41 so as to be spaced apart from the floor surface. The upper surface of the base pan 40 may be provided with a compressor 51 and an outdoor heat exchanger 55 for constituting a refrigeration cycle.

In detail, the compressor 51 may be provided on the upper surface of the base frame 41. The compressor (51) compresses the gaseous refrigerant at a high temperature and a high pressure. The compressor (51) is composed of a constant speed compressor which rotates at a constant speed and compresses to a constant capacity, an inverter And a compressor may be respectively provided.

The refrigerant pipe connected to the outlet of each of the compressors 51 is provided with an oil separator 52 for separating the oil contained in the refrigerant discharged from the compressor 51 to separate the oil in the discharged refrigerant, And can be recovered by the compressor (51).

A four-way valve is provided at one side of the outdoor unit 1 to selectively supply the refrigerant passing through the oil separator 52 to the indoor heat exchanger (not shown) or the outdoor heat exchanger 55, (53) is provided.

The four-way valve 53 is respectively connected to the indoor heat exchanger 55, the outdoor heat exchanger 55, the compressor 51 and the accumulator 54. The refrigerant discharged from the compressor 51 is cooled And is configured to be able to switch the flow path so as to be selectively supplied to the indoor heat exchanger and the outdoor heat exchanger (55).

The accumulator 54 is connected to the indoor heat exchanger and the four-way valve 53 at one side of the base fan 40. The accumulator 54 separates the refrigerant in the liquid state from the refrigerant in the gaseous state so that the refrigerant in the liquid state is stored and the gaseous refrigerant can be supplied to the compressor 51.

The outdoor heat exchanger 55 exchanges heat between the outdoor air and the refrigerant so that outdoor air is forced to pass through the outdoor heat exchanger 55 by the air blowing fan 80 to perform heat exchange with the refrigerant.

The outdoor heat exchanger (55) is formed along the periphery of the base pan (40) and is disposed over four sides of the outdoor unit (1). At this time, both ends of the outdoor unit 1 are arranged to be apart from each other at a corner formed by the left side and the front side of the outdoor unit 1, and a predetermined space is formed. The space between both ends of the outdoor unit (1) is opened when the service panel (35) is separated, and the various pipes constituting the refrigeration cycle and the control box (56) can be accessed through this space.

The outdoor heat exchanger 55 may extend from the base pan 40 to a height adjacent to the blowing fan 80. Accordingly, the outdoor heat exchanger 55 is formed to cover the inlet ports 311, 331, and 371 from the inside of the outdoor unit 1, and all the air passing through the inlet ports 311, 331, and 371 passes through the outdoor heat exchanger 55 Allowing them to pass.

A shroud 90 is mounted on the inside upper part of the outdoor unit 1 and a blowing fan 80 is installed on the inside of the shroud 90. The shroud 90 is for guiding the discharged air, and is open in the up and down direction. The side surface of the shroud 90 is formed to round in a shape depressed inward. The opening is formed to be wider toward the upper side from the center. The upper surface of the shroud 90 has the same shape as that of the discharge port 11 so that the discharge air can be efficiently guided to the discharge port 11. [

1, the outdoor air flows into the outdoor unit 1 through the inlets 311, 331, and 371 provided on the side of the outdoor unit 1. Passes through the outdoor heat exchanger 55 arranged to correspond to the suction ports 311, 331 and 371 and is discharged to the outside of the outdoor unit 1 through the discharge port 11 provided in the upper portion of the outdoor unit 1. [

Through the flow of the air, the outdoor heat exchanger 55 and the outdoor air can be heat-exchanged. Specifically, when the air conditioner performs cooling operation, the outdoor heat exchanger 55 functions as a condenser and discharges heat to the outdoor air. Further, when the air conditioner performs the heating operation, the outdoor heat exchanger 55 functions as an evaporator and takes heat of the outdoor air.

When the outdoor heat exchanger 55 functions as an evaporator, the condensed water generated on the surface of the outdoor heat exchanger 55 may freeze and congestion may occur. When the conception of the outdoor heat exchanger (55) is sensed, the air conditioner performs the defrosting operation. The defrosting operation corresponds to a reverse cycle operation, that is, a cooling operation, and the outdoor heat exchanger 55 functions as a condenser to remove the frost.

That is, since the defrosting operation corresponds to the cooling operation which must be performed when the heating operation is required, the defrosting operation should be performed at a minimum. Therefore, it is important to reliably detect the conception of the outdoor heat exchanger (55). Hereinafter, an apparatus for measuring whether or not the outdoor heat exchanger 55 has been frosted will be described.

4 is a perspective view illustrating the inside of an outdoor unit of an air conditioner according to an embodiment of the present invention.

The outdoor unit (1) includes a differential pressure measurement device (100) for measuring whether or not the outdoor heat exchanger (55) is frosted. Here, the differential pressure measuring apparatus 100 is a device for measuring a differential pressure between spaced apart positions, and may be used for other purposes besides whether implantation occurs.

The differential pressure is measured by comparing the pressure before passing through the outdoor heat exchanger (55) through the differential pressure measurement device (100) and the pressure after passing through the outdoor heat exchanger (55). When the conception of the outdoor heat exchanger (55) is generated, the differential pressure is measured to be higher than when the conception is not generated. Therefore, when the differential pressure is equal to or greater than a predetermined pressure, defrost operation can be performed.

The differential pressure measuring apparatus 100 may measure the pressure before passing through the outdoor heat exchanger 55 and the pressure after passing through the outdoor heat exchanger 55. Therefore, the differential pressure measurement apparatus 100 includes a first pay-up unit 120 and a second pay-up unit 140 installed to measure a pressure at a specific place.

The first blow-off unit 120 and the second blow-out unit 140 may be disposed at various positions.

For example, in order to measure the pressure before passing through the outdoor heat exchanger 55, the first blow-off unit 120 or the second blow-out unit 140 measures the pressure outside the outdoor unit 1 . However, in order to measure the pressure outside the outdoor unit 1, the first booster unit 120 or the second booster unit 140 must be disposed outside the outdoor unit 1. Accordingly, problems such as water infiltration or freezing of the first blow-off unit 120 or the second blow-out unit 140 may occur.

In order to prevent this, the differential pressure measurement apparatus 100 including the first spout portion 120 and the second spout portion 140 is disposed inside the outdoor unit 1. Further, in order to increase the accuracy of the differential pressure measurement apparatus 100, it is preferable that the differential pressure measurement apparatus 100 is disposed at a position where the influence of flow is minimized. Therefore, the first blow-off unit 120 and the second blow-out unit 140 can be disposed at a place where the influence of the flow is minimized and the blow-out possibility of the foreign matter is relatively low.

4, the first hearth 120 is positioned between the shrouds 90, that is, outside the shrouds 90. As shown in FIG. Since the pressure before passing through the outdoor heat exchanger 55 can be measured by measuring the same value as the atmospheric pressure, the value measured by the first evaporator 120 can be measured by the outdoor heat exchanger 55 It can be understood as pressure before passing.

Also, the second blow-off unit 140 may be installed at one side of the outdoor heat exchanger 55. Specifically, it is disposed on the inner surface of the outdoor heat exchanger (55) so that outdoor air can be measured immediately after passing through the outdoor heat exchanger (55).

The installation positions of the first blow-off unit 120 and the second blow-out unit 140 described above may vary depending on the internal shape of the outdoor unit 1. The differential pressure measuring apparatus 100 is installed inside the outdoor unit 1 and the first hearing unit 120 is positioned to measure the atmospheric pressure and the second hearing unit 140 is located outside the outdoor unit 1. [ Is located at one side of the heat exchanger (55).

The temperature of the outdoor heat exchanger (55) is compared with the temperature of the outdoor air flowing through the outdoor unit (1) to judge whether or not the air conditioner is in a confused state. That is, the temperature and differential pressure of the outdoor heat exchanger 55 may be measured to determine whether or not the congealing has occurred, and it is possible to measure whether or not the congealing has occurred. Accordingly, the number and time of the defrosting operation can be reduced, and the efficiency of heating can be increased to increase the efficiency.

FIG. 5 is a view showing a control box and a differential pressure measuring device of an outdoor unit of an air conditioner according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating an apparatus for measuring a differential pressure of an outdoor unit of an air conditioner according to an embodiment of the present invention. Fig.

As described above, the differential pressure measuring apparatus 100 includes the first stirrer 120 and the second stirrer 140 for measuring the pressures at mutually spaced locations. The differential pressure measuring apparatus 100 further includes a differential pressure sensor 110 for measuring a differential pressure between the first stirrer 120 and the second stirrer 140.

That is, in actuality, the absolute differential pressure may not be measured in the first and second hearing parts 120 and 140, and the first hearing part 120 and the second hearing part It is possible to calculate the differential pressure at the position where the blowing part 149 is installed. Also, the differential pressure sensor 110 may calculate the difference by measuring absolute pressures of the first and second stirrers 120 and 140.

The differential pressure sensor 110 may be installed inside the control box 56. In addition, the differential pressure sensor 110 may be connected to a PCB disposed inside the control box 56. That is, since the differential pressure sensor 110 is installed inside the control box 56, it is possible to more easily transmit the differential pressure information to the control unit.

5 and 6, the differential pressure measuring apparatus 100 includes a first hose 130 connecting the differential pressure sensor 110 and the first stirrer 120, And a second hose 150 connecting the second blow-off unit 140 and the second blow- In this case, the differential pressure sensor 110 and the first and second boots 120 and 140 may include a connection unit connected to the first and second hoses 130 and 150.

The first hose 130 and the second hose 150 have passages through which air flows. That is, the first hose 130 and the second hose 150 serve as air passages. In addition, the first hose 130 and the second hose 150 are provided as flexible hoses to increase the degree of freedom of installation of the differential pressure measurement apparatus 100.

The differential pressure sensor 110 is disposed inside the control box 56 and the first stirrer 120 is disposed outside the shroud 90 as described above. Accordingly, the first hose 130 is extended from the control box 56 toward the shroud 90.

In detail, a through hole 56a through which the wiring is passed is provided on one side of the control box 56. [ 5, the through-hole 56a formed in the lower surface of the control box 56 is exemplarily shown. Accordingly, the first hose 130 is coupled to the differential pressure sensor 110 at one end and extends outside the control box 56 through the through hole 56a.

The first hose 130 extends to the shroud 90 disposed above the outdoor unit 1. Since the first hose 130 is made of a flexible material, the first hose 130 can be extended so as not to interfere with the devices disposed inside the outdoor unit 1.

The first hose 130 may be fixed to one side of the shroud 90 or the outboard panel 30 and the first blowhole 120 may be coupled to the other end of the shroud 90.

One end of the second hose 150 is coupled to the differential pressure sensor 110 and extends to the outside of the control box 56 through the through hole 56a. The control box 56 may further include an extension 56b extending toward the outdoor heat exchanger 55 so that the second hose 150 is fixed.

The second hosel portion (120) is coupled to the other end of the second hose (150) fixed by the extension portion (56b). The extension portion 56b is provided to measure the differential pressure more precisely because the second blow-off portion 140 is installed as close as possible to the outdoor heat exchanger 55. [ Accordingly, the extension portion 56b has an exemplary structure, and the second hose 150 can be fixed by the internal structure of the outdoor unit 1. [

Hereinafter, the shapes of the first blow-off unit 120 and the second blow-out unit 140 will be described in detail. The first blow-off unit 120 and the second blow-off unit 140 may have the same shape, and the first blow-off unit 120 will be described as an example. Hereinafter, the first blowhole 120 is referred to as a blowhole, and the first hose 130 is referred to as a hose.

FIG. 7 and FIG. 8 are views showing a boiling portion of an apparatus for measuring a differential pressure of an outdoor unit of an air conditioner according to an embodiment of the present invention.

As shown in FIGS. 7 and 8, the blow-off unit 120 is provided in a cylindrical shape having an internal space. That is, the blowing unit 120 has a flat upper surface 120a and a lower surface 120b and a side surface 120c connecting the upper surface 120a and the lower surface 120b.

At this time, the upper surface 120a is located on the upstream side of the air flow direction improving enhancement, and the lower surface 120b is the surface located on the downstream side of the air flow enhancement. Therefore, the installation direction of the blowing part 120 is not fixed by the upper surface 120a and the lower surface 120b, but the blowing part 120 may be installed according to the direction of air flow.

The upper surface 120a is provided to close the inner space of the tongue 120 and the lower surface 120b is provided to communicate with the inner space of the tongue 120. [ That is, one end of the blowing unit 120 is closed and the other end is opened.

The hose coupling part 122 is coupled to the hose 130 at the other end of the opened mouthpiece 120, that is, in the lower part of the drawing. The hose coupling part 122 is provided to correspond to the size of the hose 130. The hose 130 may be inserted into the hose coupling portion 122 or may be coupled to surround the hose coupling portion 122. Air may flow through the open lower surface 120b to the hose 130. [

In addition, the hose coupling part 122 may be provided with a mesh network for preventing foreign matter from entering or an o-ring for preventing leakage of air.

An inlet 128 formed in the side surface 120c is formed in the tuyere unit 120 to communicate with the internal space of the tuyere unit 120. [ The inlet 128 may be divided into a plurality of portions along the circumference of the side surface 120c. The size of the inlet 128 and the number of the inlet 128 may be various.

A first guide 124 and a second guide 126 for guiding the flow of air to the inlet 128 are provided on the upper portion of the spout 120. As shown in FIG. The first guide 124 is positioned above the inlet 128 and the second guide 126 is positioned below the inlet 128. [ That is, the inlet 128 is positioned between the first guide 124 and the second guide 126.

The first guide 124 and the second guide 126 may be formed at predetermined angles along the circumference of the spout 120. The first guide 124 and the second guide 126 may be provided in a claw-like shape as a whole.

In detail, the first guide 124 and the second guide 126 are coupled to the side surface 120c at the lower end in the drawing, and have a larger diameter than the side surface 120c at the upper end. Thus, overall, the top is installed in the crockery 120 in a wide corrugated form.

The first guide 124 has a lower end adjacent to the upper surface 120a to form the upper end of the spout 120. The first guide 124 and the upper surface 120a may be provided at the upper end of the spout 120 in the form of a dish.

The lower end of the second guide 126 is provided on the lower side of the inlet 128 to surround the inlet 128. That is, at least a part of the inlet 128 may not be exposed to the outside by the second guide 126.

Hereinafter, the flow of air will be described with reference to the structure of the blowing unit 120.

9 is a view showing the flow of air in the spout of the apparatus for measuring the differential pressure of an outdoor unit of an air conditioner according to an embodiment of the present invention.

In Fig. 9, for example, air is shown flowing from top to bottom in the figure. As described above, the spout 120 is disposed such that the upper surface 120a is located on the upstream side and the lower surface 120b is located on the downstream side. Accordingly, the flow direction of the air flowing from the inlet port 128 formed in the side surface 120c is vertically arranged.

The air flowing toward the tuyeres 120 can be flowed at least partly in the direction opposite to the flow direction along the first guide by the upper surface and the first guide. Accordingly, the flow of air around the outer periphery of the tuyeres 120 can be reduced. That is, the first guide 124 can dissipate a flow having a large kinetic energy.

At least a portion of the air may also flow through the second guide 126 to the inlet 128. The second guide 126 may reduce irregularities in the flow and may flow to the inlet 128.

Relatively less flowed air can flow through the inlet 128 into the interior space of the tuyeres 120. That is, the first guide 124 and the second guide 126 can reduce the flow unnecessary for measurement and provide the inlet 128 with the flow. Accordingly, it is possible to reduce the measurement error and improve the accuracy.

Also, the first guide 124 may be stably installed at a predetermined installation position. For example, the first guide 124 may be installed in contact with one side of the outdoor heat exchanger 55. Accordingly, the air passing through the outdoor heat exchanger (55) flows along the first guide (124) and can be introduced into the inlet (128).

In addition, the second guide 126 may block impurities such as dust flowing into the inlet 128.

The structure of the above-mentioned spout portion may be applied to the first spout portion 120 and the second spout portion 140 in the same manner.

The first hearth 120 is installed between the shrouds 90 and measures the atmospheric pressure corresponding to the pressure of the air before passing through the outdoor heat exchanger 55. [ The second blow-off unit 140 is installed on one side of the outdoor heat exchanger 55 and measures the pressure of the air that has passed through the outdoor heat exchanger 55.

The differential pressure sensor 110 connected to the first booster part 120 and the second booster part 140 and the first hose 130 and the second hose 150 is connected to the inside of the control box 56 And measures the differential pressure of the pressure measured at each of the blow-off units 120 and 140. The control unit transmits information on the differential pressure to the control unit, and the control unit compares the predetermined differential pressure and the actually measured differential pressure.

In addition, the controller can receive information on the temperature of the outdoor heat exchanger (55) and the outdoor air temperature by a temperature sensor or the like. Therefore, the control unit can determine whether or not the outdoor heat exchanger 55 has been frosted according to the differential pressure and temperature information.

Therefore, it is possible to determine whether or not the implantation has occurred more accurately, and the defrosting operation is performed only when it is determined that implantation has occurred. As a result, the number of defrosting operations and the operating time can be reduced, and the heating efficiency and the heating duration can be increased.

10: outdoor unit 100: differential pressure measuring device
110: differential pressure sensor 120: first pre-
122: hose coupling part 124: first guide
126: second guide 128: inlet
130: first hose 140: second hearth part
150: 2nd hose

Claims (11)

Casing;
An outdoor heat exchanger installed inside the casing; And
And a differential pressure measuring device for measuring a differential pressure of air passing through the outdoor heat exchanger,
In the differential pressure measuring device,
A first stirrer provided inside the casing;
A second stirrer provided at one side of the outdoor heat exchanger for measuring a pressure of air passing through the outdoor heat exchanger; And
And a differential pressure sensor for measuring a differential pressure of the pressure measured at the first and second booster portions. The method according to claim 1,
A blowing fan for forcibly convecting the outdoor air so that the outdoor heat exchanger and the outdoor air are heat-exchanged; And
And a shroud disposed outside the blowing fan,
And the first hearth portion is installed on the outer side of the shroud. 3. The method of claim 2,
Wherein the differential pressure sensor is installed inside a control box disposed inside the casing. The method of claim 3,
In the differential pressure measuring device,
A first hose connecting the first evaporator and the differential pressure sensor; And
And a second hose connecting the second booster portion and the differential pressure sensor. 5. The method of claim 4,
In the control box,
Wherein the first hose and the second hose are formed with through-holes so as to pass through the first hose and the second hose. 5. The method of claim 4,
In the control box,
And an extension extending toward the outdoor heat exchanger is provided to fix the second hose. The method according to claim 1,
Wherein the first hearth portion and the second hearth portion are provided in a cylindrical shape having an inner space,
In the first hearth portion and the second hearth portion,
An upper surface located on the upstream side of the airflow enhancement of the air;
A lower surface located on the downstream side of the air flow enhancement; And
And a side surface connecting the upper surface and the lower surface. 8. The method of claim 7,
Wherein the upper surface is provided to close the inner space of the tongue portion, and the lower surface is provided to communicate with the inner space of the tongue portion. 8. The method of claim 7,
Further comprising: at least one inlet formed in the side surface so as to communicate with the internal space. 10. The method of claim 9,
The tuyere further includes a first guide and a second guide for guiding the flow of air to the inlet,
Wherein the inlet is disposed between the first guide and the second guide. 11. The method of claim 10,
Wherein the first guide and the second guide are provided in the form of a claw formed at a predetermined angle along the periphery of the spout.

Images