JP2021124236A - Air conditioner - Google Patents

Abstract

To provide an air conditioner capable of avoiding an erroneous detection risk in an installation state which does not require refrigerant detection means and a combustion risk in the case where the refrigerant leaks, even in the case where the combination of the selection of the installation state and presence/absence of the refrigerant detection means is mistaken, in a free built-in type indoor unit mounting flammable or slightly flammable refrigerant detection means.SOLUTION: In an air conditioner which has a free built-in type indoor unit, the indoor unit includes: refrigerant detection means for detecting a refrigerant gas; a blower device; a wind direction deflection device for deflecting the wind direction of the blowing air; an alarm device for issuing an alarm when a refrigerant gas is detected by the refrigerant detection means; and control means for controlling the refrigerant detection means, the blower device, the wind direction deflection device and the alarm device. A control device selectively switches the output of the refrigerant detection means to one of valid and invalid according to the place where the indoor unit is installed.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a free built-in type air conditioner installed in a top bag or a base bag.

Patent Document 1 discloses an air conditioner that immediately responds to a leak of a flammable refrigerant to prevent a permanent leak of the refrigerant. The air conditioner disclosed in this document includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a throttle device, and includes a refrigerant detecting means and a refrigerant discharging unit as part of a refrigerating cycle using a flammable refrigerant. Equipped with a fan.

Japanese Unexamined Patent Publication No. 11-304226

According to the present disclosure, in an indoor unit of a free built-in type air conditioner equipped with a flammable or slightly flammable refrigerant detecting means, the refrigerant detecting means can be used even if the combination of the selection of the installation state and the presence or absence of the refrigerant detecting means is incorrect. Provided is an air conditioner capable of avoiding the risk of false detection in an unnecessary installation state and the risk of combustion when the refrigerant leaks.

The air conditioner in the present disclosure is an air conditioner having a free built-in type indoor unit, and the indoor unit includes a refrigerant detecting means for detecting a refrigerant gas, a blower, and a wind direction deflection for deflecting the wind direction of the blown air. The device includes a device, an alarm device that issues a warning when a refrigerant gas is detected by the refrigerant detecting means, a refrigerant detecting means, a blower device, a wind direction deflection device, and a control means for controlling the alarm device. The control device selectively switches the output of the refrigerant detecting means to either valid or invalid depending on the location where the indoor unit is installed.

The air conditioner in the present disclosure is a free built-in indoor unit in which the installation location can be freely selected, and even if the combination of the selection of the installation state and the presence / absence of the refrigerant detection means is incorrect, the installation state does not require the refrigerant detection means. It is possible to avoid the risk of false detection and the risk of combustion when the refrigerant leaks.

Longitudinal sectional view of the air conditioner according to the first embodiment of the present invention. The control block diagram according to the first embodiment of the present invention. Control flowchart according to the first embodiment of the present invention

At the time when the inventors came up with the present disclosure, the indoor unit of the free built-in air conditioner equipped with a flammable refrigerant or a slightly flammable refrigerant detected the refrigerant gas to detect the refrigerant gas leak from the unit. It was equipped with means. Since the refrigerant gas is heavier than air, the leaked refrigerant gas is naturally agitated and the refrigerant gas detecting means is unnecessary when the top bag is installed. However, since the refrigerant gas detection means was installed and operated in any installation situation, the refrigerant gas detection means was set to "invalid" under the bag installation situation in order to eliminate the problem of false detection. ..

Under such circumstances, the inventors will entrust the important work for safety to the installer of the indoor unit, and there is a possibility that the refrigerant detector may be forgotten to be attached. The subject of the present disclosure constitutes the subject of the present disclosure in order to find the problem that the provision of the refrigerant gas detecting means also causes a problem of false detection or increases the manufacturing cost, and solves the problem. It came to.

Therefore, the present disclosure is an air conditioner having a free built-in type indoor unit, and the indoor unit includes a refrigerant detecting means for detecting a refrigerant gas, a blower, and a wind direction deflector for deflecting the wind direction of the blown air. It has an alarm device that issues a warning when a refrigerant gas is detected by the refrigerant detection means, a refrigerant detection means, a blower device, a wind direction deflection device, and a control means that controls the alarm device. The control device is installed by an indoor unit. By selectively switching the output of the refrigerant detection means to either valid or invalid according to the location where the refrigerant is detected, false detection is not caused, and the refrigerant gas leak is reliably detected and emitted only in the necessary installation conditions. Can be informed.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters or duplicate explanations for substantially the same configuration may be omitted.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 3.
FIG. 1 is a vertical cross section of an indoor unit of an air conditioner according to the present invention.

The air conditioner according to the present embodiment includes an indoor unit 1 and an outdoor unit (not shown). The indoor unit 1 and the outdoor unit are connected by a refrigerant pipe and a control wiring (not shown), and the indoor unit 1 and the outdoor unit are connected in an annular shape by a pipe to form a heat pump.
The outdoor unit is equipped with a compressor. The indoor unit 1 is attached to a bag near the ceiling surface of the room or a bag near the ground.
The indoor unit 1 has an air outlet 2 formed therein, and is provided with a refrigerant gas detecting means (sensor) 52 inside the main body.

The suction port 7 is formed on the lower surface of the main body 1, and the indoor air sucked from the suction port 7 is sucked by the fan 3, exchanges heat with the heat exchanger 4, and is blown into the room again from the outlet 2.
A wind direction deflecting blade 6 for deflecting the direction of the blown air is provided on the downstream side of the outlet 2, and the direction of the blown air can be freely deflected from the upper direction to the lower direction.

Although the fan 3 is shown as a turbo fan in FIG. 1, it does not have to be a turbo fan and may be a cross flow fan or a centrifugal fan.

In addition, the main body 1 or the outdoor unit is provided with an installation switching switch (not shown), which can be switched according to the installation status of the indoor unit 1 (top bag installation or ground bag installation). ing.

FIG. 2 is a control block diagram of the air conditioner. The control unit 51 includes a refrigerant gas detecting means (sensor) 52, an installation switching SW53, an installation switching SW53, an error release signal reception remote control signal output device 54, a suction temperature sensor 55, a pipe temperature sensor 56, a compressor temperature sensor 57, and the like. A fan motor 58, a wind direction motor 59, an alarm device 60, and a compressor 61 are connected.

FIG. 3 is a control flowchart.

First, when the installer installs the indoor unit 1, the installation switching SW53 selectively switches between "top bag installation" and "ground bag installation" (S101).

Then, when "installation of bag" is selected, the wind direction deflector 6 is automatically set to have an angle equal to or less than horizontal (S102), and then normal operation is started (S103).

On the other hand, when "installation of ground bag" is selected, the wind direction deflector 6 is automatically set to have an angle equal to or higher than the horizontal (S104), and then the detection of the refrigerant gas is started (S105), and the refrigerant gas is started. When is detected, a blower operation for stirring the refrigerant is performed (S106), a refrigerant leakage alarm is issued (S107), and when the alarm is canceled (S108), normal operation starts (S109).

The operation of the refrigerant leak alarm includes the following operations. That is, as the contents of the gas leak error operation, 1. Stirring operation for a certain period of time, 2. After a certain period of time, check the gas concentration, and if there is no decrease in the gas concentration, stir for a predetermined time, and stop when the gas concentration falls below the predetermined value.
Repeat 2 until the gas concentration falls below a predetermined value.

In addition, 3. It will stop until the gas leak error is cleared. More specifically, "remote control is not accepted." "Even if the power is reset, it is not accepted." However, gas leak detection ⇒ gas leak error operation is performed.

1 Indoor unit 2 Air outlet 3 Fan 4 Heat exchanger 6 Wind direction deflector 7 Suction port 52 Refrigerant gas detection means

Claims (4)

An air conditioner having a free built-in type indoor unit, wherein the indoor unit is provided with a refrigerant detecting means for detecting a refrigerant gas, a blower, a wind direction deflector for deflecting the direction of the blown air, and the refrigerant detecting means. It has an alarm device that issues an alarm when a refrigerant gas is detected, a refrigerant detection means, a blower device, a wind direction deflection device, and a control means that controls the alarm device. An air conditioner characterized in that the output of the refrigerant detecting means is selectively switched to either valid or invalid depending on the installation location. The air conditioner has an installation switching SW, and when "ground bag installation" is selected by the installation switching SW, the control device is controlled to a position where the wind direction deflector deflects the wind direction upward from the horizontal. When the refrigerant detecting means detects the leakage of the refrigerant, the blower is operated, the refrigerant is stirred, an error is displayed on the alarm device, and the installation switching SW selects a device other than "ground bag installation". In the control device, the wind direction deflector is controlled at a position where the wind direction is deflected downward from the horizontal direction, and when the refrigerant detecting means detects the leakage of the refrigerant, the blower is operated to invalidate the detection by the refrigerant detecting means. The air conditioner according to claim 1, wherein no error display is performed on the alarm device. The air conditioner according to any one of claims 1 to 2, wherein the control device swings the wind direction deflector when the refrigerant detecting means detects a refrigerant gas. When the operation of swinging the wind direction deflector is maintained for a predetermined time and the refrigerant detecting means detects the refrigerant gas after the predetermined time elapses, the operation of swinging the wind direction deflector is further repeated, and the predetermined time elapses. The air conditioner according to claim 3, wherein the operation is stopped when the refrigerant detecting means later stops detecting the refrigerant gas.

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