CN203757887U - Refrigerating fluid flow distributing unit and air conditioner - Google Patents

Abstract

The utility model provides a refrigerant splitting unit and an air conditioner. The refrigerant distribution unit (3) divides the gas pipe (33a) and the liquid pipe (31a) into multiple branches in the case, and is provided with a branch part (33) surrounding the gas pipe (33a) in the case and divides the gas pipe ( 33a) and the liquid pipe (31a) are insulated for gas pipes (32, 34), which can prevent dew condensation on the gas pipes and can be miniaturized.

Description

Refrigerant split unit and air conditioner

technical field

The utility model relates to a refrigerant distribution unit which is arranged between one outdoor unit and a plurality of indoor units and branches a refrigerant pipe into a plurality of branch refrigerant pipes, and an air conditioner equipped with the same.

Background technique

In a multi-type air conditioner in which one outdoor unit and a plurality of indoor units are connected, a refrigerant distribution unit is provided between the outdoor unit and the plurality of indoor units. The refrigerant distribution unit connects the outdoor heat exchanger provided in the outdoor unit and the indoor heat exchanger provided in the plurality of indoor units. The refrigerant distribution unit has a case, and the branch portion of the gas pipe and the branch portion of the liquid pipe are accommodated in the case.

In addition, the housing of the refrigerant distribution unit accommodates: a plurality of electronic expansion valves corresponding to the branch pipes and used to adjust the refrigerant pressure; a piping temperature sensor. In addition, the refrigerant distribution unit also accommodates the board of the distribution control device, which controls the opening of each electronic expansion valve based on the temperature detected by the piping temperature sensor, and can make any one of the plurality of indoor units and the outdoor unit operate at the same time. The ratio of :1 is connected and used (for example, refer to Patent Document 1).

Therefore, in the inside of the refrigerant distribution unit, there is a part where the temperature is lower than the outside temperature, such as a low-pressure pipe (for example, a gas pipe), and dew condensation occurs in this part. Therefore, a drain pan mechanism is provided inside the refrigerant branching unit to allow drainage.

In addition, by filling the housing of the refrigerant distribution unit with a heat insulating material such as foamed synthetic resin, and collectively molding and fixing components of the refrigerant distribution unit, dew condensation is prevented (for example, refer to Patent Document 1).

In addition, there is also a device that installs a heat insulator on the outer wall of the cabinet of the refrigerant distribution unit to prevent air from entering from the outside and reduce the amount of condensation inside (for example, refer to Patent Document 2).

Patent Document 1: Japanese Patent Application Laid-Open No. 10-281595 (FIG. 7)

Patent Document 2: Japanese Patent Laid-Open No. 2006-300380 (FIG. 4)

However, in the device in which the drain pan mechanism is provided inside the refrigerant distribution unit, and in the device in which the refrigerant distribution unit is collectively molded and fixed using heat insulators such as foamed synthetic resin, the outer contour of the refrigerant distribution unit has to be changed. big.

In addition, for installing a thermal insulator on the outer wall of the cabinet of the refrigerant distribution unit and preventing air from entering the device from the outside, it is difficult to completely prevent air from entering the device from the outside because the connecting piping part connecting the outside, that is, connecting the indoor unit and the outdoor unit, passes through the refrigerant distribution unit. Enter. Also, since the inside of the cabinet is an insulated space, the branch of the gas pipe (sometimes called a gas line) and the branch of a liquid pipe (sometimes called a liquid line) are placed in the same position in a bare state within the cabinet. Therefore, for example, problems such as water droplets adhering to the electronic expansion valve provided on the liquid line or rusting due to moisture may arise.

Furthermore, since the case side is insulated, the size of the refrigerant distribution unit, especially in the height direction, becomes large. Most of the refrigerant distribution units are installed on the back of the top wall, and it may not be possible to install them if the height is not suppressed.

Utility model content

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to obtain a refrigerant distribution unit capable of preventing dew condensation on a gas line and achieving miniaturization, and an air conditioner equipped with the same.

The refrigerant splitting unit related to the utility model divides the gas pipe and the liquid pipe into multiple branches in the case, and has a gas pipe that surrounds the branch of the gas pipe and insulates the gas pipe and the liquid pipe in the case. insulation.

In addition, the air conditioner according to the present invention has a refrigerant distribution unit for branching the gas pipe and the liquid pipe into multiples between the outdoor unit and the plurality of indoor units connected via the gas pipe and the liquid pipe. The refrigerant distribution unit adopts the refrigerant distribution unit.

According to the refrigerant distribution unit of the present invention, it is possible to insulate between the gas pipe and the liquid pipe by the gas pipe heat insulating material surrounding the branch portion of the gas pipe inside the cabinet. In terms of circuit configuration, since the gas pipeline has the lowest temperature, the branch of the gas pipe should be the most insulated part. Conversely, if the heat insulation of the branch of the gas pipe can be focused, the other parts Simple insulation or no insulation is possible. Therefore, dew condensation on the gas line can be prevented and the size can be reduced. In addition, it is possible to reduce the possibility of dew condensation on the electronic expansion valve installed in the liquid line.

Moreover, according to the air conditioner of this invention, since it is equipped with the refrigerant distribution unit as mentioned above, it becomes easy to install a refrigerant distribution unit on the back surface of a ceiling wall.

Description of drawings

FIG. 1 is a refrigerant circuit diagram of an air conditioner according to Embodiment 1 of the present invention.

Fig. 2 is a perspective view showing the configuration of the refrigerant distribution unit according to Embodiment 1 of the present invention.

Fig. 3 is a perspective view showing the configuration of a refrigerant distribution unit according to Embodiment 2 of the present invention.

Fig. 4 is a perspective view showing the configuration of a refrigerant distribution unit according to Embodiment 3 of the present invention.

reference sign

1: outdoor unit; 2a, 2b: indoor unit; 3, 3A, 3B: refrigerant distribution unit; 4a: outdoor blower; 4b, 4c: indoor blower; 11, 12, 13, 14, 15, 16: branch pipe; 20: accumulator; 21: compressor; 22: outdoor heat exchanger; 23: control circuit; 24a, 24b: indoor heat exchanger; 25a, 25b: control circuit; 26: electronic expansion valve, 27, 28: piping temperature sensor; 29: control circuit; 30, 30A, 30B: cover member; 30a, 35a: notch; 31, 33: branch; 31a: liquid pipe; 32, 34, 38: heat insulating member for gas pipe; 34a, 37a, 38a: depressions; 33a: gas pipes; 35, 35A, 35B: bottom parts; 36, 37: heat insulating parts for liquid pipes; 40a, 40b, 40c: temperature sensors.

Detailed ways

Embodiment 1

FIG. 1 is a refrigerant circuit diagram of an air conditioner according to Embodiment 1 of the present invention. Fig. 2 is a perspective view showing the configuration of the refrigerant distribution unit according to Embodiment 1 of the present invention.

The air conditioner according to Embodiment 1 of the present invention includes: one outdoor unit 1 ; a plurality of indoor units 2 a , 2 b ; and a refrigerant distribution unit 3 as described in FIGS. 1 and 2 .

Built in the outdoor unit 1 are: an outdoor heat exchanger 22; a compressor 21; an accumulator 20; and an outdoor blower 4a that generates heat for exchanging heat between the refrigerant in the outdoor heat exchanger 22 and the outside air. air flow. In addition, the outdoor unit 1 incorporates a temperature sensor 40c such as a thermistor for detecting the temperature of the refrigerant in the outdoor heat exchanger 22, and a control circuit 23 for controlling the device. In addition, the outdoor unit 1 includes a four-way valve for switching between cooling and heating operations by switching the refrigerant flow path, which is omitted for convenience of description.

The indoor units 2a, 2b include indoor heat exchangers 24a, 24b, and temperature sensors 40a, 40b for detecting indoor temperature, respectively. In addition, indoor units 2a and 2b generate air flows for heat exchange between indoor heat exchangers 24a and 24b and indoor air, and include indoor blowers 4b and 4c such as cross-flow fans, for example. In addition, the indoor units 2a, 2b are equipped with control circuits 25a, 25b that communicate with the refrigerant distribution unit 3 and control the fan motor.

The outdoor heat exchanger 22 in the outdoor unit 1 and the indoor heat exchangers 24a, 24b in the indoor units 2a, 2b are connected via the liquid pipe 31a and the branch pipes 14, 15, 16, and the gas pipe 33a and the branch pipes 11, 12, 13. connect. Therefore, refrigerant distribution unit 3 is provided for branching from liquid pipe 31a and gas pipe 33a of outdoor unit 1 to branch pipes 11, 12, 13 and branch pipes 14, 15, 16 of indoor units 2a, 2b.

The refrigerant branch unit 3 has: the branch 31 of the liquid pipe 31a; the branch 33 of the gas pipe 33a; the electronic expansion valve 26 that is respectively arranged on the branch pipes 14, 15, 16 of the liquid pipe 31a; The bottom member 35 and the cover member 30 made of a metal plate, and the refrigerant distribution unit 3 are configured so that any one of a plurality of indoor units can be connected to an outdoor unit at a ratio of 1:1 and used. At this time, surplus refrigerant is stored in the accumulator 20 . Further, the refrigerant branching unit 3 has pipe temperature sensors 28 such as thermistors at the branch pipes 14 , 15 , and 16 of the liquid pipe 31 a. Further, the refrigerant branching unit 3 has pipe temperature sensors 27 such as thermistors at the branch pipes 11 , 12 , and 13 of the gas pipe 33 a. During cooling, the piping temperature sensor 28 detects the evaporation temperature, and the piping temperature sensor 27 detects the dryness. The electronic expansion valve 26 is attached to the liquid line side of the piping connecting the outdoor unit 1 and the indoor units 2a and 2b as described above. In addition, the refrigerant distribution unit 3 is equipped with a control circuit 29 that communicates between the control circuit 23 of the outdoor unit 1 and the control circuits 25a, 25b of the indoor units 2a, 2b, and that is detected by the pipe temperature sensor 27. The degree of dryness and the evaporation temperature detected by the piping temperature sensor 28 control the opening degree of the electronic expansion valve 26 .

The gas line inside the refrigerant distribution unit 3 is low temperature. Therefore, the refrigerant branching unit 3 is equipped with heat insulating materials 32 and 34 for gas pipes. As shown in FIG. insulated between.

The heat insulators 32 and 34 for gas pipes are composed of a pair of molded products of foamed resin, such as polypropylene, polyethylene, AS resin, and styrene, which sandwich the gas pipe 33a. Recesses 32a, 34a capable of accommodating a part of the branch portion 33 of the gas pipe 33a are respectively provided on the facing surfaces of 32, 34.

In addition, among the gas pipe heat insulators 32 and 34, the back surface of the gas pipe heat insulator 32 on the liquid pipe 31a side is provided with a recess 32b capable of accommodating part of the branch portion 31 of the liquid pipe 31a, and can be used as a liquid pipe heat insulator.

For the lid member 30 and the bottom member 35 that are made of metal plates that are divided into two parts as the cabinet, a cutout 30a for extracting the liquid pipe 31a is formed on one side of the cover member 30, and a gas outlet is formed on one side of the bottom member 35. Cutout 35a of tube 33a.

Thus, according to the refrigerant distribution unit of the present invention, the gas pipe 33a and the liquid pipe 31a are insulated by the gas pipe heat insulators 32 and 34 surrounding the branch portion 33 of the gas pipe 33a inside the cabinet. In terms of circuit configuration, since the gas pipeline has the lowest temperature, the branch part 33 of the gas pipe 33a is the part where the heat insulation should be strengthened the most. Conversely, if the branch portion 33 of the gas pipe 33a can be mainly insulated, the other portions can be simply insulated or not insulated. Therefore, dew condensation on the gas line can be prevented and the size can be reduced. In addition, it is possible to reduce the possibility of dew condensation on the electronic expansion valve 26 attached to the liquid line.

In addition, since the height of the cabinet of the refrigerant distribution unit 3 can be compressed through miniaturization, it is easy to install the refrigerant distribution unit 3 on the back of the top wall, and by extension, it is easy to install the refrigerant distribution unit on the back of the top wall. 3 air conditioners.

In addition, the heat insulators 32 and 34 for gas pipes are constituted by a pair of foamed resin molded products sandwiching the gas pipe 33a. Since the recesses 32a and 34a of a part of the branch portion 33 of the gas pipe 33a are accommodated, the thickness of the heat insulating material can be suppressed with ease of manufacture.

In addition, since the insulator 32 for gas pipes is provided with a recess 32b capable of accommodating part of the branch portion 31 of the liquid pipe 31a on the back surface, the heat insulator 32 for gas pipes can be used as a heat insulator for liquid pipes. Shared and able to make it universal.

In addition, since the chassis is constituted by the bottom member 35 and the cover member 30 made of metal plates fitted to each other, it can be easily disassembled while improving operability at the time of maintenance.

Embodiment 2

Fig. 3 is a perspective view showing the configuration of a refrigerant distribution unit according to Embodiment 2 of the present invention. In the figure, the same components as those of the first embodiment described above are denoted by the same symbols.

As shown in FIG. 3 , in the refrigerant branching unit 3A according to the second embodiment of the present invention, the branch portion 31 sandwiching the liquid pipe 31 a together with the shared gas pipe heat insulator 32 is added and molded from a foamed resin. The heat insulator 36 for liquid pipes constituted as a product, and a recess 36a capable of accommodating a part of the branch portion 31 of the liquid pipe 31a is provided on the surface of the heat insulator 36 for liquid pipes that faces the heat insulator 32 for gas pipes. The configuration other than that is the same as that of the first embodiment described above.

In the refrigerant branching unit 3A according to Embodiment 2 of the present invention, since the branch portion 33 of the gas pipe 33a and the branch portion 31 of the liquid pipe 31a can be separated for heat insulation, the thickness of the heat insulating material can be made different from that of the conventional one. thinner than that. Therefore, it is possible to prevent dew condensation on the gas line and to reduce the size. Furthermore, it is possible to reduce the possibility of dew condensation on the electronic expansion valve 26 attached to the liquid line.

Embodiment 3

Fig. 4 is a perspective view showing the configuration of a refrigerant distribution unit according to Embodiment 3 of the present invention. In the figure, the same parts as those in the second embodiment are denoted by the same symbols.

As shown in FIG. 4 , in the refrigerant distribution unit 3B according to Embodiment 3 of the present invention, the cabinets include two cabinets for gas pipes and two cabinets for liquid pipes, the branch part 33 of the gas pipe 33a and the branch part 31 of the liquid pipe 31a Separately housed in the case for gas pipes and the case for liquid pipes.

That is, in the refrigerant distribution unit 3B according to Embodiment 3 of the present invention, the gas pipe heat insulating material sandwiching the branch portion 33 of the gas pipe 33a together with the gas pipe heat insulating material 34 and composed of a foamed resin molded product is added. 38. Moreover, the recess 38a which can accommodate a part of the branch part 33 of the gas pipe 33a is provided in the opposing surface of the heat insulator 38 for gas pipes which opposes the heat insulator 34 for gas pipes. Then, the gas pipe heat insulators 34 and 38 sandwiching the branch portion 33 of the gas pipe 33a are sandwiched and housed between the cover member 30B and the bottom member 35B made of metal plates divided into two as a cabinet.

In addition, in the refrigerant distribution unit 3B according to Embodiment 3 of the present invention, the liquid pipe heat insulating material sandwiching the branch portion 31 of the liquid pipe 31 a together with the liquid pipe heat insulating material 36 and composed of a foamed resin molded product is added. 37. Further, a recess 37 a capable of accommodating a part of the branch portion 31 of the liquid pipe 31 a is provided on the surface of the liquid pipe heat insulator 37 facing the liquid pipe heat insulator 36 . Then, the liquid pipe heat insulators 36 and 37 sandwiching the branch portion 31 of the liquid pipe 31a are sandwiched and accommodated between the cover member 30A and the bottom member 35A made of metal plates divided into two as a case. The configuration other than that is the same as that of the second embodiment described above.

In the refrigerant branch unit 3A according to Embodiment 2 of the present invention, since the branch portion 33 of the gas pipe 33a and the branch portion 31 of the liquid pipe 31a are partitioned and insulated, the height of the stand alone can be reduced. Therefore, it is possible to prevent dew condensation on the gas line and to reduce the size. Moreover, the degree of freedom of setting is improved.

Claims (6)

1. a cold-producing medium dividing cell makes respectively flue and liquid line branch into multiple in cabinet, and this cold-producing medium unit is characterised in that,

In described cabinet, possess and surround the branching portion of described flue and by flue insulation adiabatic between this flue and described liquid line.

2. cold-producing medium dividing cell according to claim 1, is characterized in that,

Described flue is made up of a pair of apparatus for producing molded foamed resin product that clamps described flue with insulation, is respectively equipped with the depression of a part for the branching portion that can receive described flue in the opposed faces of the described flue insulation being made up of above-mentioned apparatus for producing molded foamed resin product.

3. cold-producing medium dividing cell according to claim 2, is characterized in that,

Be provided with the depression of a part for the branching portion that can receive described liquid line with the back side of insulation at described flue.

4. according to the cold-producing medium dividing cell described in any one in claim 1～3, it is characterized in that,

Described cabinet possesses bottom parts and the cover that chimeric each other metallic plate is made.

5. cold-producing medium dividing cell according to claim 4, is characterized in that,

Described cabinet is made up of with cabinet and these two cabinets of liquid line cabinet flue, and the branching portion of described flue and the branching portion of described liquid line are separately accommodated in respectively flue cabinet and liquid line cabinet.

6. an air conditioner has described flue and described liquid line is branched into respectively to multiple cold-producing medium dividing cell between the off-premises station connecting via flue and liquid line and multiple indoor set, it is characterized in that,

Described air conditioner adopts as the cold-producing medium dividing cell described in any one in the claim 1～3 of described cold-producing medium dividing cell.