Water-cooling condensation hot water reheating unit machine

Abstract

The utility model belongs to the technical field of refrigeration air conditioners, and particularly relates to a water-cooling condensation hot water reheating unit machine which comprises a compressor, a shell-type heat exchanger, an expansion valve, an evaporation coil pipe, a cooling tower and a hot water coil pipe, an outlet of the compressor is connected with a refrigerant inlet of the shell-type heat exchanger, and a refrigerant outlet of the shell-type heat exchanger is connected with an inlet of the expansion valve. An outlet of the expansion valve is connected with an inlet of the evaporation coil, an outlet of the evaporation coil is connected with an inlet of the compressor, a water inlet of the shell type heat exchanger is connected with a water outlet of the cooling tower, a water outlet of the shell type heat exchanger is connected with a water inlet of the hot water coil and a water inlet of the cooling tower, and a water outlet of the hot water coil is connected with the water inlet of the cooling tower. The hot water coil pipe is placed in the air handling unit, electric heating is replaced, energy consumption of the whole unit is reduced, and meanwhile control over the indoor constant-temperature and constant-humidity environment is achieved. The hot water coil pipe is connected with the shell-type heat exchanger and the cooling tower, and the heat recovery coil pipe takes away part of heat, so that the load of the cooling tower is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration and air conditioning technology, and in particular relates to a water-cooled condensing hot water reheat unit. Background Technology

[0002] A constant temperature and humidity machine is a device specifically designed to control the temperature and humidity within a specific space. It typically consists of a refrigeration system, a heating system, a control system, a humidification system, an air circulation system, and a sensor system, combining electrical and mechanical refrigeration technologies. This equipment can automatically heat, cool, humidify, dehumidify, and purify the air, and can also add fresh air to ensure that the indoor environment maintains constant temperature and humidity within the set range. Constant temperature and humidity machines are widely used in museums, electronics manufacturing, industrial manufacturing, flower greenhouses, mushroom cultivation, archives, telecommunications, power, and wood and paper industries, among others.

[0003] Currently, common control methods for constant temperature and humidity machines ensure that the air reaches the required humidity level first. However, dehumidification often involves cooling, which results in the dehumidified air being in a low-temperature and low-humidity state. Therefore, it is necessary to heat the treated air to the required temperature using electric heating.

[0004] This method of cooling and dehumidifying followed by electric reheating typically results in high unit energy consumption and excessively high operating costs. Therefore, condensation heat recovery constant temperature and humidity air conditioning systems have emerged, using condensation heat to replace electric reheating and reduce air conditioning unit energy consumption. However, the energy consumption of these methods remains relatively high. Furthermore, in hot summer weather and in applications requiring significant cooling, such as data centers and chemical plants, cooling towers often operate under high loads to meet system cooling demands. Prolonged high-load operation reduces the cooling tower's heat exchange efficiency, shortens its lifespan, increases carbon emissions, impacts the surrounding environment, and increases maintenance and repair costs due to unstable equipment operation. Utility Model Content

[0005] The purpose of this invention is to provide a water-cooled condensing hot water reheat unit to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A water-cooled condensing hot water reheat unit includes a compressor, a shell-and-shell heat exchanger, an expansion valve, an evaporator coil, a cooling tower, and a hot water coil. The compressor outlet is connected to the refrigerant inlet of the shell-and-shell heat exchanger, the refrigerant outlet of the shell-and-shell heat exchanger is connected to the inlet of the expansion valve, the outlet of the expansion valve is connected to the inlet of the evaporator coil, the outlet of the evaporator coil is connected to the compressor inlet, the water inlet of the shell-and-shell heat exchanger is connected to the water outlet of the cooling tower, the water outlet of the shell-and-shell heat exchanger is connected to the water inlet of both the hot water coil and the cooling tower, and the water outlet of the hot water coil is connected to the water inlet of the cooling tower.

[0008] Preferably, an oil separator is installed between the compressor and the shell-and-shell heat exchanger, a liquid receiver and a dryer filter are installed sequentially between the shell-and-shell heat exchanger and the expansion valve, a liquid separator is installed between the expansion valve and the evaporator coil, and a copper filter and a gas-liquid separator are installed sequentially between the evaporator coil and the compressor.

[0009] Preferably, a water pump is installed between the cooling tower and the shell heat exchanger piping, a three-way valve is installed between the shell heat exchanger and the hot water coil and cooling tower piping, and a one-way valve is installed between the hot water coil and the cooling tower piping.

[0010] Preferably, the three-way valve is a three-way electric ball valve, which controls the flow rate of water entering the hot water coil by adjusting the opening degree.

[0011] Preferably, the compressor is a variable frequency compressor, used to regulate the refrigerant flow in the pipeline.

[0012] Preferably, the expansion valve is an electronic expansion valve used for refrigerant throttling.

[0013] Preferably, after the refrigerant flows out of the compressor outlet, it passes sequentially through an oil separator, a shell-and-shell heat exchanger, a liquid receiver, a dryer filter, an expansion valve, a distributor, an evaporator coil, a copper filter, and a gas-liquid separator before flowing back to the compressor to form a refrigeration cycle.

[0014] Preferred configuration: After water flows out of the cooling tower outlet, it passes through the water pump, shell heat exchanger, three-way valve, hot water coil, and one-way valve in sequence before flowing back to the cooling tower to form a heat recovery cycle.

[0015] Compared with existing technologies, the beneficial effects are as follows:

[0016] 1. Hot water coils are placed in the air handling unit to replace electric heating, which reduces the energy consumption of the whole unit and achieves control of the indoor constant temperature and humidity environment.

[0017] 2. The hot water coil is connected to the shell heat exchanger and the cooling tower. Because the heat recovery coil removes some heat, the temperature difference between the inlet and outlet water of the cooling tower is reduced, thus reducing the load on the cooling tower and improving its efficiency; extending the service life of the cooling tower; reducing the carbon emissions of the equipment; and because the equipment operates more stably, it may reduce the occurrence of failures, thereby reducing maintenance and repair costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the system flow of a water-cooled condensing hot water reheat unit according to the present invention.

[0020] The annotations in the attached figures are explained as follows:

[0021] 1. Compressor; 2. Oil separator; 3. Shell heat exchanger; 4. Cooling tower; 5. Water pump; 6. Three-way valve; 7. Hot water coil; 8. Check valve; 9. Liquid receiver; 10. Dryer filter; 11. Expansion valve; 12. Liquid distributor; 13. Evaporator coil; 14. Copper filter; 15. Gas-liquid separator. Detailed Implementation

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figure 1As shown, a water-cooled condensing hot water reheat unit includes a compressor 1, a shell-and-shell heat exchanger 3, an expansion valve 11, an evaporator coil 13, a cooling tower 4, and a hot water coil 7. The compressor 1 is a variable frequency compressor 1 used to regulate the refrigerant flow in the pipeline. The outlet of the compressor 1 is connected to the refrigerant inlet of the shell-and-shell heat exchanger 3. The refrigerant outlet of the shell-and-shell heat exchanger 3 is connected to the inlet of the expansion valve 11. The expansion valve 11 is an electronic expansion valve 11 used for refrigerant throttling. The outlet of the expansion valve 11 is connected to the inlet of the evaporator coil 13. The outlet of the evaporator coil 13 is connected to the inlet of the compressor 1. The inlet of the shell-and-shell heat exchanger 3 is connected to the outlet of the cooling tower 4. The outlet of the shell-and-shell heat exchanger 3 is connected to the inlet of the hot water coil 7 and the inlet of the cooling tower 4. The outlet of the hot water coil 7 is connected to the inlet of the cooling tower 4.

[0025] Furthermore: an oil separator 2 is installed between the compressor 1 and the shell heat exchanger 3; a liquid receiver 9 and a dryer filter 10 are installed between the shell heat exchanger 3 and the expansion valve 11; a liquid distributor 12 is installed between the expansion valve 11 and the evaporator coil 13; and a copper filter 14 and a gas-liquid separator 15 are installed between the evaporator coil 13 and the compressor 1. After the refrigerant flows out of the compressor 1 outlet, it passes through the oil separator 2, the shell heat exchanger 3, the liquid receiver 9, the dryer filter 10, the expansion valve 11, the liquid distributor 12, the evaporator coil 13, the copper filter 14, and the gas-liquid separator 15 in sequence before flowing back to the compressor 1 to form a refrigeration cycle.

[0026] Furthermore: A water pump 5 is installed between the pipes of cooling tower 4 and shell heat exchanger 3. A three-way valve 6 is installed between the pipes of shell heat exchanger 3, hot water coil 7, and cooling tower 4. The three-way valve 6 is a three-way electric ball valve. The flow rate of water entering the hot water coil 7 is controlled by adjusting the opening. A one-way valve 8 is installed between the pipes of hot water coil 7 and cooling tower 4. After the water flows out of the outlet of cooling tower 4, it flows back to cooling tower 4 in sequence through water pump 5, shell heat exchanger 3, three-way valve 6, hot water coil 7, and one-way valve 8 to form a heat recovery cycle.

[0027] Working principle: It has two modes: conventional cooling mode and cooling plus condensing heat recovery mode. In conventional cooling mode, the three-way valve 6 completely cuts off the channel to the hot water coil 7. Under the action of the water pump 5, the water directly enters the shell heat exchanger 3 from the cooling tower 4 and then returns to the cooling tower 4. It is suitable for cooling and dehumidification under general needs.

[0028] In the refrigeration plus condensation heat recovery mode, the cooling tower 4 inputs low-temperature water into the shell heat exchanger 3 via the water pump 5. The heat released by the refrigerant condensation heats up the water in the shell heat exchanger 3. The heated water then enters the hot water coil 7 located in the air handling unit through the three-way valve 6 to heat the indoor air. It then returns to the cooling tower 4 through the one-way valve 8, forming a water system circulation. In this mode, the hot water coil 7 acts as a reheater, recovering the system's condensation heat and replacing the function of electric heating to reheat the processed air, thus achieving energy saving and consumption reduction.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A water-cooled condensing hot water reheat unit, characterized in that: The system includes a compressor (1), a shell heat exchanger (3), an expansion valve (11), an evaporator coil (13), a cooling tower (4), and a hot water coil (7). The outlet of the compressor (1) is connected to the refrigerant inlet of the shell heat exchanger (3). The refrigerant outlet of the shell heat exchanger (3) is connected to the inlet of the expansion valve (11). The outlet of the expansion valve (11) is connected to the inlet of the evaporator coil (13). The outlet of the evaporator coil (13) is connected to the inlet of the compressor (1). The inlet of the shell heat exchanger (3) is connected to the outlet of the cooling tower (4). The outlets of the shell heat exchanger (3) are connected to the inlets of the hot water coil (7) and the cooling tower (4). The outlet of the hot water coil (7) is connected to the inlet of the cooling tower (4).

2. The water-cooled condensing hot water reheat unit according to claim 1, characterized in that: An oil separator (2) is provided between the compressor (1) and the shell heat exchanger (3). A liquid receiver (9) and a dryer filter (10) are sequentially provided between the shell heat exchanger (3) and the expansion valve (11). A liquid separator (12) is provided between the expansion valve (11) and the evaporator coil (13). A copper filter (14) and a gas-liquid separator (15) are sequentially provided between the evaporator coil (13) and the compressor (1).

3. The water-cooled condensing hot water reheat unit according to claim 1, characterized in that: A water pump (5) is installed between the pipeline of the cooling tower (4) and the shell heat exchanger (3), a three-way valve (6) is installed between the pipeline of the shell heat exchanger (3) and the hot water coil (7) and the cooling tower (4), and a one-way valve (8) is installed between the pipeline of the hot water coil (7) and the cooling tower (4).

4. A water-cooled condensing hot water reheat unit according to claim 3, characterized in that: The three-way valve (6) is a three-way electric ball valve, which controls the flow rate of water entering the hot water coil (7) by adjusting the opening degree.

5. A water-cooled condensing hot water reheat unit according to claim 1, characterized in that: The compressor (1) is a variable frequency compressor (1) used to regulate the refrigerant flow in the pipeline.

6. A water-cooled condensing hot water reheat unit according to claim 1, characterized in that: The expansion valve (11) is an electronic expansion valve (11) used for refrigerant throttling.

7. A water-cooled condensing hot water reheat unit according to claim 2, characterized in that: After the refrigerant flows out of the compressor (1), it passes through the oil separator (2), the shell heat exchanger (3), the liquid receiver (9), the dryer filter (10), the expansion valve (11), the liquid distributor (12), the evaporator coil (13), the copper filter (14), and the gas-liquid separator (15) in sequence before flowing back to the compressor (1) to form a refrigeration cycle.

8. A water-cooled condensing hot water reheat unit according to claim 3, characterized in that: After the water flows out of the outlet of the cooling tower (4), it passes through the water pump (5), the shell heat exchanger (3), the three-way valve (6), the hot water coil (7), and the one-way valve (8) in sequence before flowing back to the cooling tower (4) to form a heat recovery cycle.

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