Integrated heat recovery unit

Abstract

The utility model relates to a new trend heat exchange technical field especially, and one kind of integrated heat recovery unit, including the new trend cooling heat exchanger and new trend reheating heat exchanger of installation on the new trend pipeline, and the circulating pipeline is installed between the new trend cooling heat exchanger and new trend reheating heat exchanger, and the circulating pipeline that the new trend cooling heat exchanger leads into new trend reheating heat exchanger installs the electric control circulation module. One kind of integrated heat recovery unit of the utility model uses heat recovery coil as heat exchange medium, adopts glycol solution as carrier, recovers the heat in new trend cooling processing, passes through heat recovery coil and delivers to glycol solution, raises the temperature of glycol solution, then through glycol circulating pump, the glycol solution that is heated is transported to the heat recovery coil of new trend reheating measurement, improves new trend temperature, reduces the reheat load of system and the operation cost of whole air conditioning system, whole device adopts split type structure design, and the installation is convenient, and the space restraint is small.

Description

Technical Field

[0001] This utility model relates to the field of fresh air heat exchange technology, and in particular to an integrated heat recovery unit. Background Technology

[0002] In the pharmaceutical, medical, and chemical industries, 100% fresh air conditioning systems are used due to process or safety considerations. These systems typically require constant temperature and humidity control as well as air purification, and operate for extended periods, resulting in extremely high energy consumption. Furthermore, traditional 100% fresh air conditioning systems need to provide both cooling and heating sources simultaneously in summer, leading to significant cooling-heat offsetting.

[0003] Among similar heat exchanger designs currently available on the market, rotary, heat pipe, and finned types are the most common. These typically utilize heat pipes and fins as carriers to directly exchange heat between fresh and exhaust air. However, these methods all suffer from cross-contamination and leakage issues between fresh and exhaust air. Furthermore, rotary and finned heat exchangers have fixed piping locations, requiring re-connection at the exhaust end to the fresh air inlet, resulting in a large footprint and difficult adjustments. In retrofitting older projects where space is limited and equipment safety requirements are high, none of these three types of heat exchangers are suitable. Utility Model Content

[0004] The technical problem this invention aims to solve is that current heat exchanger designs occupy a large area and are difficult to adjust.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an integrated heat recovery unit, including a fresh air cooling heat exchanger and a fresh air reheat heat exchanger installed on the fresh air duct, a circulation pipe is installed between the fresh air cooling heat exchanger and the fresh air reheat heat exchanger, and an electrically controlled circulation module is installed on the circulation pipe from the fresh air cooling heat exchanger to the fresh air reheat heat exchanger.

[0006] The electronically controlled circulation module includes an open water tank, a first ethylene glycol circulation pump, and a second ethylene glycol circulation pump.

[0007] Both the first and second ethylene glycol circulation pumps are equipped with Y-type filters and check valves at their inlet sections.

[0008] The fresh air cooling heat exchanger and the fresh air reheat heat exchanger are both composed of an upper heat recovery coil and a lower heat recovery coil installed on the fresh air duct, an upper cover fixed to the outside of the upper heat recovery coil, and a lower cover fixed to the outside of the lower heat recovery coil.

[0009] The upper and lower covers are fixedly assembled by bolts on both sides, and the upper and lower heat recovery coils are connected by a guide nozzle inserted into the inlet.

[0010] The upper and lower heat recovery coils have annular sealing grooves on the outside of their guide nozzles, and internal sealing rings that cooperate with the annular sealing grooves are provided inside their inlets.

[0011] The beneficial effects of this utility model are:

[0012] (1) The integrated heat recovery unit of this utility model uses heat recovery coil as heat exchange medium and ethylene glycol solution as carrier to recover heat in the fresh air cooling process. The heat is transferred to the ethylene glycol solution through the heat recovery coil to raise the temperature of the ethylene glycol solution. Then, the heated ethylene glycol solution is transported to the heat recovery coil of the fresh air reheating test through the ethylene glycol circulation pump to increase the fresh air temperature, reduce the reheat load of the system and the operating cost of the entire air conditioning system.

[0013] (2) The entire device adopts a split structure design, which is convenient to install and has little space constraint;

[0014] (3) The ethylene glycol circulation pump is set up in a one-in-one-out-of-service manner. Y-type filters and check valves are installed at the inlet section of the ethylene glycol circulation pump to improve the cleanliness of the circulation channel and facilitate later maintenance. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the fresh air cooling heat exchanger and the fresh air reheat heat exchanger in this utility model. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Figure 1 and Figure 2An integrated heat recovery unit is shown, including a fresh air cooling heat exchanger 2 and a fresh air reheat heat exchanger 3 installed on a fresh air duct 1. A circulation pipe 4 is installed between the fresh air cooling heat exchanger 2 and the fresh air reheat heat exchanger 3. An electrically controlled circulation module 5 is installed on the circulation pipe 4 from the fresh air cooling heat exchanger 2 to the fresh air reheat heat exchanger 3.

[0021] To facilitate circulation, the electronically controlled circulation module 5 includes an open water tank 51, a first ethylene glycol circulation pump 52, and a second ethylene glycol circulation pump 53.

[0022] Using the fresh air cooling heat exchanger 2 and the fresh air reheat heat exchanger 3 as heat exchange media, and ethylene glycol solution as a carrier, heat from the fresh air cooling process is recovered and transferred to the ethylene glycol solution through the fresh air cooling heat exchanger 2, raising the temperature of the ethylene glycol solution. Then, the heated ethylene glycol solution is transported to the fresh air reheat heat exchanger 3 on the fresh air reheat side by either the first ethylene glycol circulation pump 52 or the second ethylene glycol circulation pump 53, increasing the fresh air temperature and reducing the system's reheat load and the overall operating cost of the air conditioning system. Finally, the heat is returned to the fresh air cooling heat exchanger 2 through the circulation pipe 4 from the fresh air reheat heat exchanger 3.

[0023] The heat recovery process recovers heat from untreated fresh air during the summer, and then reheats the fresh air for heat exchange. The ventilation volume of the fresh air handling unit is known to be 10,000 m³ / h. 3 A 25% mass fraction ethylene glycol solution is selected, and the flow rate of the ethylene glycol solution is specified to not exceed 1.5 m / s for stable operation.

[0024] To filter internal impurities, both the first ethylene glycol circulation pump 52 and the second ethylene glycol circulation pump 53 are equipped with Y-type filters 6 and check valves 7 at their inlet sections.

[0025] To facilitate assembly and heat exchange, both the fresh air cooling heat exchanger 2 and the fresh air reheat heat exchanger 3 consist of an upper heat recovery coil 8, a lower heat recovery coil 9, an upper cover 10 fixed to the outside of the upper heat recovery coil 8, and a lower cover 11 fixed to the outside of the lower heat recovery coil 9, all installed on the fresh air duct 1.

[0026] The upper cover 10 covers the fresh air duct 1 from the top, and the lower cover 11 covers the fresh air duct 1 from the bottom. They are then fixed by bolts on both sides. At this time, the upper heat recovery coil 8 and the lower heat recovery coil 9 are connected in series to form a heat exchange tube coiled on the fresh air duct 1.

[0027] To facilitate loading, unloading, and fixing, the upper cover 10 and the lower cover 11 are fixed together by bolts on both sides. The upper heat recovery coil 8 and the lower heat recovery coil 9 are connected and assembled by inserting the guide nozzle 12 of the outlet into the inlet.

[0028] To improve assembly firmness and sealing performance, annular sealing grooves 121 are provided on the outer side of the guide nozzles 12 of the upper heat recovery coil 8 and the lower heat recovery coil 9, and an inner sealing ring 122 that cooperates with the annular sealing grooves 121 is provided inside the inlet of the upper heat recovery coil 8 and the lower heat recovery coil 9.

[0029] When the guide nozzle 12 is inserted into the inlet, the inner sealing ring 122 will be inserted into the annular sealing groove 121, thereby enhancing the assembly sealing of the upper heat recovery coil 8 and the lower heat recovery coil 9.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An integrated heat recovery unit, comprising a fresh air cooling heat exchanger (2) and a fresh air reheat heat exchanger (3) installed on a fresh air duct (1), characterized in that: A circulation pipe (4) is installed between the fresh air cooling heat exchanger (2) and the fresh air reheat heat exchanger (3). An electrically controlled circulation module (5) is installed on the circulation pipe (4) from the fresh air cooling heat exchanger (2) to the fresh air reheat heat exchanger (3).

2. The integrated heat recovery unit according to claim 1, characterized in that: The electronically controlled circulation module (5) includes an open water tank (51), a first ethylene glycol circulation pump (52), and a second ethylene glycol circulation pump (53).

3. The integrated heat recovery unit according to claim 2, characterized in that: The inlet sections of the first ethylene glycol circulation pump (52) and the second ethylene glycol circulation pump (53) are both equipped with Y-type filters (6) and check valves (7).

4. The integrated heat recovery unit according to claim 1, characterized in that: The fresh air cooling heat exchanger (2) and the fresh air reheat heat exchanger (3) are both composed of an upper heat recovery coil (8) and a lower heat recovery coil (9) installed on the fresh air duct (1), an upper cover (10) fixed to the outside of the upper heat recovery coil (8) and a lower cover (11) fixed to the outside of the lower heat recovery coil (9).

5. An integrated heat recovery unit according to claim 4, characterized in that: The upper cover (10) and the lower cover (11) are fixedly assembled by bolts on both sides, and the upper heat recovery coil (8) and the lower heat recovery coil (9) are connected and assembled by inserting the guide nozzle (12) of the outlet into the inlet.

6. An integrated heat recovery unit according to claim 5, characterized in that: The upper heat recovery coil (8) and the lower heat recovery coil (9) have an annular sealing groove (121) on the outside of the guide nozzle (12), and the upper heat recovery coil (8) and the lower heat recovery coil (9) have an internal sealing ring (122) that matches the annular sealing groove (121) inside the inlet.

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