Recycling device of four-pipe air conditioning system

Abstract

The invention discloses a recovery device of a four-pipe air conditioning system, which comprises a recovery box, a first channel and a second channel which are arranged in a snakelike manner are arranged in the recovery box, the first channel and the second channel are vertically arranged, the first channel penetrates through the second channel, one end of the first channel is connected with waste heat of the four-pipe air conditioning system, and the other end of the first channel is connected with the waste heat of the four-pipe air conditioning system. One end of the second channel is connected with cooling water; compared with the prior art, the first channel and the second channel which are arranged in the snake shape are formed in the recycling box, and the contact path of waste heat generated by the four-pipe air conditioning system and cooling water is prolonged in cooperation with the arrangement mode of the first channel and the second channel, so that the heat exchange time is shortened, and the heat exchange efficiency is improved; therefore, waste heat in the four-pipe air conditioning system can be recycled more efficiently.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a recovery device for a four-pipe air-conditioning system. Background Art

[0002] The principle of four-pipe heating is to achieve energy saving by recycling waste heat. It does not need to run the refrigeration cycle and the heating cycle at the same time. It has four pipes, and only two of them need to be used when running the refrigeration or heating cycle. In the cooling mode, the refrigerant flows through the indoor unit through the pipes, absorbing heat while dissipating heat to the outdoor unit; in the heating mode, the heating agent flows through the outdoor unit through the pipes, absorbing heat while dissipating heat to the indoor unit, which has the effect of improving efficiency and saving energy.

[0003] However, after the water for heat exchange with the refrigerant or the heating agent completes the heat exchange, the water still contains a part of the heat. Considering energy saving, this part of the heat will be recovered; for example, CN220771272U discloses a ground source heat pump four-pipe air conditioning cold recovery system, including a heat pump unit, and the heat pump unit is composed of an evaporator and a condenser;

[0004] The evaporator is connected to the cold water circuit, the condenser is connected to the hot water circuit, and the cold water circuit and the hot water circuit are respectively connected to the first working circuit and the buried pipe heat exchange circuit through a switching valve;

[0005] The buried pipe heat exchange loop is connected to a branch, the branch is a second working loop, and a cold recovery circulation pump is provided in the second working loop.

[0006] The waste heat in the four-pipe air-conditioning system is recovered through the first working loop and the buried pipe heat exchange loop, but no in-depth consideration is given to how to recover the waste heat in the four-pipe air-conditioning system more efficiently. Summary of the invention

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a recovery device for a four-pipe air-conditioning system to solve the problem in the prior art of how to more efficiently recover the waste heat in the four-pipe air-conditioning system.

[0008] To achieve the above object, the present invention adopts the following technical solution: a recovery device for a four-pipe air conditioning system, comprising:

[0009] A recovery box has a first channel and a second channel arranged in a serpentine shape, the first channel and the second channel are arranged vertically and the first channel passes through the second channel, one end of the first channel is connected to the waste heat of the four-pipe air-conditioning system, and one end of the second channel is connected to cooling water.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The recovery device forms a first channel and a second channel arranged in a serpentine shape in the recovery box, and cooperates with the arrangement of the first channel and the second channel to extend the contact path between the waste heat (i.e., hot water) generated by the four-pipe air-conditioning system and the cooling water, thereby improving the heat exchange time and efficiency, and recovering the waste heat in the four-pipe air-conditioning system more efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0013] Figure 2 for Figure 1 Schematic diagram of the recycling tank after front section;

[0014] Figure 3 for Figure 2 Schematic diagram of removing the heat recovery pipe;

[0015] Figure 4 for Figure 2 A partial cross-sectional view of the heat recovery pipe;

[0016] Figure 5 Schematic diagram of the installation of the descaling agent injection assembly on the cold water pipe or hot water inlet pipe.

[0017] The figure marks in the drawings of the specification include: recovery box 1, heat exchange chamber 2, heat recovery pipe 3, heat exchange area addition pipe 4, first inner cavity 5, second inner cavity 6, first partition 7, second partition 8, hot water inlet pipe 9, hot water outlet pipe 10, baffle 11, cold water pipe 12, return pipe 13, descaling agent injection assembly 14, plug-in joint 141, elastic bag 142, sealing plug 143, plug-in tube 144, and one-way valve 145. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below through specific embodiments:

[0019] like Figure 1 and Figure 2 As shown, an embodiment of the present invention proposes a recovery device for a four-pipe air-conditioning system, including a recovery box 1, wherein the recovery box 1 has a first channel and a second channel arranged in a serpentine shape, the first channel and the second channel are arranged vertically and the first channel passes through the second channel, one end of the first channel is connected to the waste heat of the four-pipe air-conditioning system, and one end of the second channel is connected to cooling water.

[0020] The recovery device forms a first channel and a second channel arranged in a serpentine shape in the recovery box 1, and coordinates the arrangement of the first channel and the second channel to extend the contact path between the waste heat (i.e., hot water) generated by the four-pipe air-conditioning system and the cooling water, thereby improving the heat exchange time and efficiency, and recovering the waste heat in the four-pipe air-conditioning system more efficiently.

[0021] In order to better understand this solution, further optimization will be performed below.

[0022] like Figure 2 , Figure 3 as well as Figure 4 As shown, according to another embodiment of the present invention, a recovery device of a four-pipe air-conditioning system, wherein a heat exchange chamber 2 is arranged in the recovery box 1, the first channel includes a plurality of groups of heat recovery tubes 3 arranged at intervals along the width direction of the heat exchange chamber 2, each group of heat recovery tubes 3 includes a plurality of heat recovery tubes 3 arranged at intervals along the height direction of the heat exchange chamber 2, and the plurality of heat recovery tubes 3 in each group pass through each vertical section of the second channel along a vertical section direction perpendicular to the second channel; and the portion of each heat recovery tube 3 passing through each vertical section of the second channel forms a heat exchange area increase tube 4 distributed along the vertical section direction of the second channel, and the heat exchange area increase tube 4 is placed on the inner side of the corresponding heat recovery tube 3 and is connected to the corresponding portion of each vertical section of the second channel.

[0023] In this embodiment, since a plurality of groups of heat recovery tubes 3 are arranged at intervals along the width direction of the heat exchange chamber 2 and each group of heat recovery tubes 3 includes a plurality of heat recovery tubes 3 arranged at intervals along the height direction of the heat exchange chamber 2, a plurality of heat recovery tubes 3 are arranged in an array in the heat exchange chamber 2, so that the hot water generated by the four-pipe air-conditioning system introduced into the first channel has a larger heat exchange area in the heat exchange chamber 2. At the same time, a plurality of heat exchange area additional tubes 4 are formed on each heat recovery tube 3, so that the cooling water flowing in each vertical section of the second channel not only flows through the outside of the heat recovery tube 3, but also flows away from the corresponding heat exchange area additional tube 4, so as to further increase the heat exchange area between the hot water and the cooling water, improve the heat exchange capacity, and reduce heat waste.

[0024] Among them, the heat recovery pipes 3 arranged at intervals along the width direction of the heat exchange chamber 2 can be 3 groups, 5 groups, 7 groups or 8 groups, etc.; the number of heat recovery pipes 3 arranged at intervals along the height direction of the heat exchange chamber 2 in each group of heat recovery pipes 3 can be an odd number such as 3, 5, 7 or 9.

[0025] The heat recovery pipe 3 and the heat exchange area increasing pipe 4 are both made of heat-conducting copper pipes and have good heat exchange capacity.

[0026] Based on the above scheme:

[0027] The recovery box 1 is also provided with a first inner cavity 5 located at one end outside the length direction of the heat exchange chamber 2 and a second inner cavity 6 located at the other end outside the length direction of the heat exchange chamber 2. The first inner cavity 5 is formed by a plurality of first baffles 7 arranged at intervals along the height direction of the heat exchange chamber 2 to form a plurality of independent first small inner cavities, and the second inner cavity 6 is formed by a plurality of second baffles 8 arranged at intervals along the height direction of the heat exchange chamber 2 to form a plurality of independent second small inner cavities; the first channel also includes a hot water inlet pipe 9 and a hot water outlet pipe 10, the hot water inlet pipe 9 is connected to the first small inner cavity located at the end, and the first small inner cavity located at the end is also connected to one end of the heat recovery pipe 3 located at the end of each group, and the remaining first small inner cavities are sequentially connected between one ends of two heat recovery pipes 3 arranged sequentially in the remaining heat recovery pipes 3 in each group; the hot water outlet pipe 10 is connected to the second small inner cavity located at the head end, and the second small inner cavity located at the head end is also connected to the other end of the heat recovery pipe 3 located at the head end of each group, and the remaining second small inner cavities are sequentially connected between the other ends of two heat recovery pipes 3 arranged sequentially in the remaining heat recovery pipes 3 in each group.

[0028] Specifically, the hot water inlet pipe 9 is arranged at the lower end of the right side wall of the recovery box 1, and the hot water outlet pipe 10 is arranged at the upper end of the left side wall of the recovery box 1; the hot water inlet pipe 9 introduces the hot water generated by the four-pipe air-conditioning system into the first small inner cavity connected to it, and forms a first channel arranged in a serpentine shape through multiple first small inner cavities, multiple heat recovery pipes 3 and multiple second small inner cavities. The hot water flows in the first channel and is then discharged from the hot water outlet pipe 10. The hot water has a longer flow path in the heat exchange chamber 2 to extend the heat exchange time between the hot water and the cooling water and improve the heat exchange efficiency. Specifically, the hot water exchanges heat with the cooling water flowing in the second channel during the process of flowing in the multiple heat recovery pipes 3 in the heat exchange chamber 2 to recover the waste heat in the hot water.

[0029] like Figure 2 and Figure 3 As shown, according to another embodiment of the present invention, a recovery device for a four-pipe air-conditioning system is provided, wherein a plurality of baffles 11 are arranged at intervals along the length direction of the heat exchange chamber 2, and the plurality of baffles 11 are staggeredly arranged in the heat exchange chamber 2 to form the second channel, and a plurality of heat recovery pipes 3 pass through each baffle 11.

[0030] In this embodiment, a plurality of baffles 11 are staggeredly arranged in the heat exchange chamber 2 to form a second channel arranged in a serpentine shape, so as to extend the flow path of the cooling water in the heat exchange chamber 2, so as to extend the heat exchange time between the cooling water and the hot water and improve the heat exchange efficiency. The baffles 11 also play a role in supporting and fixing the heat recovery pipe 3, so as to improve the installation stability of the heat recovery pipe 3.

[0031] Furthermore, a cold water pipe 12 and a return water pipe 13 are provided on the outer wall of the recovery box 1. The cold water pipe 12 is connected to one end of the second channel and the return water pipe 13 is connected to the other end of the second channel. Specifically, the cold water pipe 12 is provided on the right end of the top of the recovery box 1, and the return water pipe 13 is provided on the left end of the bottom of the recovery box 1. Cooling water is introduced from the cold water pipe 12 into the second channel to exchange heat with hot water and then discharged from the return water pipe 13 to recover the residual heat in the hot water.

[0032] Here, the channel formed by two adjacent baffle plates 11 in the heat exchange chamber 2 is one of the vertical sections of the second channel.

[0033] like Figure 5 As shown, in the present solution, a descaling agent injection assembly 14 can also be plugged into both the cold water pipe 12 and the hot water inlet pipe 9. After the recovery device of the four-pipe air conditioning system has been running for a period of time, the descaling agent is injected into the cold water pipe 12 or the hot water inlet pipe 9 through the descaling agent injection assembly 14. The descaling agent flows into the first channel or the second channel along with the hot water or cooling water to perform descaling, thereby further improving the waste heat recovery efficiency of the recovery device of the four-pipe air conditioning system. The descaling agent injection assembly 14 includes a plug connector 141 fixedly connected to the cold water pipe 12 or the hot water inlet pipe 9 and an elastic capsule 142 containing liquid descaling agent. A liquid replenishment port is provided at the top of the elastic capsule 142, a sealing plug 143 is provided at the liquid replenishment port, a plug tube 144 is provided at the bottom of the elastic capsule 142, and a one-way valve 145 is provided on the plug tube 144. The plug tube 144 is inserted into the plug connector 141 for adaptation and then fixed by bolts. When it is necessary to inject liquid into the cold water pipe 12 or the hot water inlet pipe 9, the descaling agent injection assembly 14 includes a plug connector 141 fixedly connected to the cold water pipe 12 or the hot water inlet pipe 9 and an elastic capsule 142 containing liquid descaling agent. A liquid replenishment port is provided at the top of the elastic capsule 142, a sealing plug 143 is provided at the liquid replenishment port, a plug tube 144 is provided at the bottom of the elastic capsule 142, and a one-way valve 145 is provided on the plug tube 144. The plug tube 144 is inserted into the plug connector 141 for adaptation and then fixed by bolts. When liquid descaling agent is added to the water pipe 12 or the hot water inlet pipe 9, the elastic bag 142 is pressed, and the pressure in the elastic bag 142 changes, so that the one-way valve 145 is opened, and the liquid descaling agent in the elastic bag 142 is pressed into the plug-in connector 141 and enters the cold water pipe 12 or the hot water inlet pipe 9; after the elastic bag 142 is released, the elastic bag 142 is reset and the one-way valve 145 is closed; the liquid replenishing port can be opened accordingly to replenish the liquid descaling agent into the elastic bag 142 or to vent the elastic bag 142.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A recovery device for a four-pipe air conditioning system, characterized in that: include: A recovery box has a first channel and a second channel arranged in a serpentine shape, the first channel and the second channel are arranged vertically and the first channel passes through the second channel, one end of the first channel is connected to the waste heat of the four-pipe air-conditioning system, and one end of the second channel is connected to cooling water.

2. The recovery device of a four-pipe air conditioning system according to claim 1, characterized in that: A heat exchange chamber is provided in the recovery box, the first channel includes a plurality of groups of heat recovery pipes arranged at intervals along the width direction of the heat exchange chamber, each group of heat recovery pipes includes a plurality of heat recovery pipes arranged at intervals along the height direction of the heat exchange chamber, and the plurality of heat recovery pipes in each group pass through each vertical section of the second channel in a direction perpendicular to the vertical section of the second channel; And the part of each heat recovery pipe passing through each vertical section of the second channel forms a heat exchange area increasing pipe distributed along the vertical section direction of the second channel. The heat exchange area increasing pipe is placed on the inner side of the corresponding heat recovery pipe and connected to the corresponding part of each vertical section of the second channel.

3. The recovery device of a four-pipe air conditioning system according to claim 2, characterized in that: The recovery box is also provided with a first inner cavity located at one end outside the length direction of the heat exchange cavity and a second inner cavity located at the other end outside the length direction of the heat exchange cavity, wherein the first inner cavity is provided with a plurality of first partitions arranged at intervals along the height direction of the heat exchange cavity to form a plurality of independent first small inner cavities, and the second inner cavity is provided with a plurality of second partitions arranged at intervals along the height direction of the heat exchange cavity to form a plurality of independent second small inner cavities; The first channel also includes: A hot water inlet pipe, the hot water inlet pipe is connected to the first small inner cavity at the end, and the first small inner cavity at the end is also connected to one end of the heat recovery pipe at the end of each group, and the remaining first small inner cavities are sequentially connected between one ends of two heat recovery pipes sequentially arranged in the remaining heat recovery pipes in each group; A hot water outlet pipe, which is connected to the second small inner cavity located at the head end, and the second small inner cavity located at the head end is also connected to the other end of the heat recovery pipe located at the head end in each group, and the remaining second small inner cavities are connected in sequence between the other ends of two heat recovery pipes arranged in sequence in the remaining heat recovery pipes in each group.

4. The recovery device of a four-pipe air conditioning system according to claim 2, characterized in that: The heat recovery pipe and the heat exchange area increasing pipe are both made of heat-conducting copper pipes.

5. A recovery device for a four-pipe air conditioning system according to any one of claims 2 to 4, characterized in that: A plurality of baffles are arranged at intervals in the heat exchange chamber along its length direction. The plurality of baffles are arranged in a staggered manner in the heat exchange chamber to form the second channel. A plurality of heat recovery pipes pass through each baffle.

6. The recovery device of a four-pipe air conditioning system according to claim 5, characterized in that: A cold water pipe and a return water pipe are arranged on the outer wall of the recovery box. The cold water pipe is connected to one end of the second channel and the return water pipe is connected to the other end of the second channel.

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