Air-conditioning apparatus

Patent metadata

Field	Value
Publication number	US-10634404-B2
Application number	US-201615768264-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Dec 22, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

An indoor unit of an air-conditioning apparatus includes: a casing; a drain pan, which is provided inside the casing, and is configured to receive condensate water generated in the load-side heat exchanger; and a refrigerant detection unit provided below the drain pan inside the casing. The refrigerant detection unit includes: a sensor configured to detect leakage of the refrigerant; and a sensor cover configured to cover the sensor from a front surface side of the sensor. The sensor cover includes: a roof portion arranged above the sensor; and a side surface portion arranged on the front surface side or a side surface side of the sensor below the roof portion. The roof portion has an eaves portion projecting outward with respect to the side surface portion, and the side surface portion has at least one first opening port configured to introduce air to an inside of the sensor cover therethrough.

First claim

The invention claimed is:

1. An air-conditioning apparatus, comprising:
a refrigerant circuit configured to circulate refrigerant therethrough; and
an indoor unit configured to accommodate at least a load-side heat exchanger of the refrigerant circuit, the indoor unit including:
a casing;
a drain pan, which is provided inside the casing, and is configured to receive condensate water generated in the load-side heat exchanger; and
a refrigerant detection unit provided below the drain pan inside the casing, the refrigerant detection unit including:
a sensor configured to detect leakage of the refrigerant;
a sensor cover configured to cover the sensor from a front surface side of the sensor; and
a mount plate arranged on a back surface side of the sensor, the sensor cover including:
a roof portion arranged above the sensor; and
a side surface portion arranged on the front surface side or a side surface side of the sensor below the roof portion,

the roof portion having an eaves portion projecting outward with respect to the side surface portion,
the side surface portion having at least one first opening port configured to introduce air to an inside of the sensor cover therethrough, and
the mount plate having a slit into which one end of the roof portion is inserted.

2. The air-conditioning apparatus of claim 1 , wherein a weir portion extending upward is formed at one end of the roof portion on a back surface side with respect to the mount plate.

3. The air-conditioning apparatus of claim 1 , wherein a locking portion to be locked to a locked portion provided to the casing, which is formed by bending the mount plate to a back surface side at an acute angle, is formed at an upper portion of the mount plate.

4. The air-conditioning apparatus of claim 1 , wherein the roof portion is inclined so that a height becomes lower toward the eaves portion.

5. The air-conditioning apparatus of claim 1 ,
wherein the casing has an air inlet configured to suck indoor air therethrough, and
wherein a fine particle adsorption filter is provided to the air inlet.

6. The air-conditioning apparatus of claim 1 ,
wherein the casing has an air inlet configured to suck indoor air therethrough and an air outlet provided above the air inlet, which is configured to blow out the air sucked through the air inlet to an indoor space therethrough, and
wherein the refrigerant detection unit is provided within a height range equal to or lower than an opening lower edge of the air inlet.

7. An air-conditioning apparatus, comprising:
a refrigerant circuit configured to circulate refrigerant therethrough; and
an indoor unit configured to accommodate at least a load-side heat exchanger of the refrigerant circuit therein, the indoor unit including:
a casing:
a drain pan, which is provided inside the casing, and is configured to receive condensate water generated in the load-side heat exchanger; and
a refrigerant detection unit provided below the drain pan inside the casing, the refrigerant detection unit including:
a sensor configured to detect leakage of the refrigerant; and
a sensor cover configured to cover the sensor from a front surface side of the sensor, the sensor cover including:
a roof portion arranged above the sensor; and
a side surface portion arranged on the front surface side or a side surface side of the sensor below the roof portion,

the roof portion having an eaves portion projecting outward with respect to the side surface portion,
the side surface portion having at least one first opening port configured to introduce air to an inside of the sensor cover therethrough,
an insertion hole into which a lead wire connected to the sensor being inserted is formed in a bottom surface portion of the sensor cover,
the lead wire having a bent portion protruding downward below the insertion hole.

8. An air-conditioning apparatus, comprising:
a refrigerant circuit configured to circulate refrigerant therethrough; and
an indoor unit configured to accommodate at least a load-side heat exchanger of the refrigerant circuit therein, the indoor unit including:
a casing:
a drain pan, which is provided inside the casing, and is configured to receive condensate water generated in the load-side heat exchanger; and
a refrigerant detection unit provided below the drain pan inside the casing, the refrigerant detection unit including:
a sensor configured to detect leakage of the refrigerant; and
a sensor cover configured to cover the sensor from a front surface side of the sensor, the sensor cover including:
a roof portion arranged above the sensor; and
a side surface portion arranged on the front surface side or a side surface side of the sensor below the roof portion,

the roof portion having an eaves portion projecting outward with respect to the side surface portion,
the side surface portion having at least one first opening port configured to introduce air to an inside of the sensor cover therethrough,
the sensor including:
a sensor device;
a board configured to receive the sensor device mounted thereon; and
a tubular container configured to accommodate the sensor device therein,

one axial end side of the tubular container being held in contact with a surface of the board,
a second opening port configured to introduce air to an inside of the tubular container therethrough being formed on an other axial end side of the tubular container,
the sensor being arranged so that the second opening port is oriented in a horizontal direction or oriented downward.

9. The air-conditioning apparatus of claim 8 , wherein a fine particle adsorption filter is provided between the second opening port and the sensor device inside the tubular container.

10. The air-conditioning apparatus of claim 8 , wherein an opening area of the at least one first opening port is larger than an opening area of the second opening port.

Assignees

• Mitsubishi Electric Corp

Inventors

• Obara Koichi
• Takagi Masahiko
• Suzuki Yasuhiro
• Tanaka Kenyu

Classifications

• F24F13/20

  Casings or covers · CPC title

• F25B49/02 Primary

  for compression type machines, plants or systems · CPC title

• G01N27/04

  by investigating resistance · CPC title

• F25B2400/12

  Inflammable refrigerants · CPC title

• F25B2500/222

  Detecting refrigerant leaks · CPC title