阅读说明：本技术 空调系统及其制冷剂量设定方法 (Air conditioning system and refrigerant quantity setting method thereof ) 是由 铃木康巨 于 2017-05-09 设计创作，主要内容包括：空调系统具备：制冷剂回路,其使制冷剂循环；热交换单元,其容纳制冷剂回路的负载侧热交换器,并分别经由供给通过了负载侧热交换器的空气的多个给气路径与多个被空调空间连接；制冷剂检测装置,其检测制冷剂的泄漏；以及多个开闭装置,它们分别设置于多个给气路径,并相互独立地进行开闭,在制冷剂检测装置检测到了制冷剂的泄漏时,多个开闭装置全部变为打开状态。(The air conditioning system is provided with: a refrigerant circuit that circulates a refrigerant; a heat exchange unit that houses a load-side heat exchanger of the refrigerant circuit and is connected to the plurality of air-conditioned spaces via a plurality of air supply paths that supply air that has passed through the load-side heat exchanger, respectively; a refrigerant detection device that detects leakage of refrigerant; and a plurality of opening/closing devices that are provided in the plurality of gas supply paths, respectively, and that open and close independently of each other, and that are all opened when the refrigerant detection device detects a refrigerant leak.)

1. An air conditioning system is characterized by comprising:

a refrigerant circuit that circulates a refrigerant;

a heat exchange unit that houses a load-side heat exchanger of the refrigerant circuit and is connected to a plurality of air-conditioned spaces via a plurality of air supply paths that supply air that has passed through the load-side heat exchanger, respectively;

a refrigerant detection device that detects leakage of the refrigerant; and

a plurality of opening/closing devices which are provided in the plurality of air supply paths, respectively, and which open and close independently of each other,

when the refrigerant detection device detects the leakage of the refrigerant, all of the plurality of opening/closing devices are opened.

2. An air conditioning system is characterized by comprising:

a refrigerant circuit that circulates a refrigerant;

a heat exchange unit that houses a load-side heat exchanger of the refrigerant circuit and is connected to a plurality of air-conditioned spaces via a plurality of air supply paths that supply air that has passed through the load-side heat exchanger, respectively;

a refrigerant detection device that detects leakage of the refrigerant;

a plurality of opening/closing devices that are provided in the plurality of air supply paths, respectively, and that open and close independently of each other; and

a setting device that sets an opening/closing device that is opened when the refrigerant detection device detects leakage of the refrigerant among the plurality of opening/closing devices,

when the refrigerant detection device detects the leakage of the refrigerant, the opening/closing device set by the setting device is opened.

3. Air conditioning system according to claim 1 or 2,

also comprises an air supply fan, a fan body,

the blower fan is operated when the refrigerant detection device detects the leakage of the refrigerant.

4. Air conditioning system according to any of claims 1 to 3,

further comprises a control unit for controlling the refrigerant circuit,

the control unit is configured to: the control unit does not permit the operation of the refrigerant circuit unless the control unit is communicably connected to the refrigerant detection device and the plurality of opening/closing devices.

5. The air conditioning system according to any one of claims 1 to 4,

the refrigerant is a flammable refrigerant.

6. The air conditioning system according to any one of claims 1 to 5,

setting the sealing amount of the refrigerant in the refrigerant circuit as M [ kg [ ]]The lower limit concentration of combustion of the refrigerant is LFL [ kg/m ]³]And a total volume of an air-conditioned space connected to the heat exchange unit via an opening/closing device that is opened when the refrigerant detection device detects the leakage of the refrigerant is set to V [ m ]³]In the case of (3), the enclosing amount M satisfies the relationship:

M＜LFL×V。

7. a method for setting the amount of refrigerant for an air conditioning system, the method setting the amount of refrigerant for an air conditioning system according to any one of claims 1 to 5,

the refrigerant quantity setting method of the air conditioning system is characterized in that,

setting the sealing amount of the refrigerant in the refrigerant circuit as M [ kg [ ]]The lower limit concentration of combustion of the refrigerant is LFL [ kg/m ]³]And a total volume of the air-conditioned space connected to the heat exchange unit via an opening/closing device that is opened when the refrigerant detection device detects the leakage of the refrigerant is denoted by V [ m ]³]In the case of (3), the sealing amount M is set so that the sealing amount M satisfies the relationship:

M＜LFL×V。

Technical Field

The present invention relates to an air conditioning system including a heat exchange unit connected to a plurality of air-conditioned spaces via a plurality of air supply paths, respectively, and a refrigerant amount setting method thereof.

Background

Patent document 1 describes an air conditioner. The air conditioner is provided with: a refrigerant detection device provided on an outer surface of the indoor unit; and a control unit that controls the indoor air supply fan to rotate when the refrigerant detection device detects the refrigerant. In this air conditioning apparatus, when the refrigerant leaks into the room from the extension pipe connected to the indoor unit, or when the refrigerant leaking from the inside of the indoor unit flows out of the indoor unit through a gap in the casing of the indoor unit, the leaked refrigerant can be detected by the refrigerant detection device. Further, by rotating the indoor blower fan after the refrigerant detection device detects the refrigerant leakage, the air in the room is sucked in through the suction port provided in the casing of the indoor unit, and the air is discharged into the room through the discharge port, so that the leaked refrigerant can be diffused.

Patent document 1: japanese patent No. 4599699

For example, in an air conditioning system that performs air conditioning of a plurality of air-conditioned spaces using one refrigerant circuit, the amount of refrigerant may be large relative to the volume of each air-conditioned space. In such an air conditioning system, when leakage of the refrigerant occurs, there is a problem that the refrigerant concentration in the air-conditioned space may increase even if the leaked refrigerant is uniformly diffused in any of the air-conditioned spaces.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object thereof is to provide an air conditioning system and a refrigerant amount setting method thereof that can prevent the refrigerant concentration in an air-conditioned space from becoming high even if refrigerant leaks.

An air conditioning system according to the present invention includes: a refrigerant circuit that circulates a refrigerant; a heat exchange unit that houses a load-side heat exchanger of the refrigerant circuit and is connected to a plurality of air-conditioned spaces via a plurality of air supply paths through which air that has passed through the load-side heat exchanger is supplied, respectively; a refrigerant detection device that detects leakage of the refrigerant; and a plurality of opening/closing devices that are provided in the plurality of gas supply paths, respectively, and that open and close independently of each other, wherein when the refrigerant detection device detects leakage of the refrigerant, all of the plurality of opening/closing devices are in an open state.

A refrigerant quantity setting method for an air conditioning system according to the present invention is a method for setting a refrigerant quantity for an air conditioning system according to the present invention, and the amount of refrigerant sealed in the refrigerant circuit is set to M [ kg [ [ kg ]]The lower limit concentration of combustion of the refrigerant is LFL [ kg/m ]³]The total volume of the air-conditioned space connected to the heat exchange unit via an opening/closing device that is opened when the refrigerant detection device detects the leakage of the refrigerant is denoted by V [ m ]³]In the case of (3), the sealing amount M is set so that the sealing amount M satisfies the relationship: m < LFL × V.

According to the present invention, even if the refrigerant leaks, the leaked refrigerant can be diffused into the air-conditioned space via the open/close device in the open state, and therefore, the refrigerant concentration in the air-conditioned space can be prevented from becoming high.

Drawings

Fig. 1 is a diagram showing a schematic configuration of an air conditioning system according to embodiment 1 of the present invention.

Fig. 2 is a flowchart showing an example of the refrigerant leakage detection process executed by the control unit 300 of the air conditioning system according to embodiment 1 of the present invention.

Fig. 3 is a diagram showing a schematic configuration of an air conditioning system according to modification 1 of embodiment 1 of the present invention.

Fig. 4 is a diagram showing a schematic configuration of an air conditioning system according to a 2 nd modification of embodiment 1 of the present invention.

Fig. 5 is a diagram showing a schematic configuration of an air conditioning system according to modification 3 of embodiment 1 of the present invention.

Fig. 6 is a diagram showing a schematic configuration of an air conditioning system according to a 4 th modification of embodiment 1 of the present invention.

Fig. 7 is a flowchart showing an example of the refrigerant leakage detection process executed by the control unit 300 of the air conditioning system according to embodiment 2 of the present invention.

Detailed Description