Water-cooling condensation reheating unit machine

Abstract

The utility model belongs to the technical field of refrigeration air conditioners, and particularly relates to a water-cooling condensation reheating unit machine which comprises a compressor, a first heat exchanger, a second heat exchanger, an expansion valve and a third heat exchanger. The second end of the first heat exchanger and the second end of the second heat exchanger communicate with the first end of the expansion valve, the second end of the expansion valve communicates with the first end of the third heat exchanger, and the second end of the third heat exchanger communicates with an inlet of the compressor. The water-cooled condenser is adopted to replace an air-cooled condenser in a common constant-temperature and constant-humidity air conditioner, the water-cooled condenser can be integrated in a unit, a special machine room for arranging an air-cooled outdoor unit is not needed, and the occupied area is saved; and connecting pipelines outside the unit are fewer, and only the water outlet pipe and the water inlet pipe of the water-cooling condenser are left, so that the pipeline mounting work is simplified, and the subsequent maintenance and repair difficulty is reduced.

Description

Technical Field

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

[0002] Constant temperature and humidity air conditioning technology is widely used in scenarios with high requirements for indoor environment, such as museums, pharmaceutical workshops, electronics factories, and computer rooms. Common control methods for constant temperature and humidity air conditioning generally prioritize meeting humidity requirements. Dehumidification methods often employ cooling dehumidification, which inevitably results in the dehumidified air being in a low temperature and low humidity state. Therefore, it is necessary to further heat the treated air to the required temperature through electric heating.

[0003] This method of cooling and dehumidifying followed by electric reheating typically results in high energy consumption and excessive operating costs. Therefore, condensation heat recovery constant temperature and humidity air conditioning systems have emerged, using condensation heat to replace electric reheating and reduce energy consumption. However, the energy consumption of these methods remains relatively high, and they require outdoor units, placing high demands on the server room. Furthermore, compared to ordinary direct expansion air conditioning systems, they involve more piping and more complex indoor-outdoor unit connections, leading to difficulties in installation and subsequent maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a water-cooled condensing and reheating unit to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A water-cooled condensing and reheating unit includes a compressor, a first heat exchanger, a second heat exchanger, an expansion valve, and a third heat exchanger. The outlet of the compressor is connected to the first end of the first heat exchanger and the first end of the second heat exchanger. The second ends of the first heat exchanger and the second end of the second heat exchanger are both connected to the first end of the expansion valve. The second end of the expansion valve is connected to the first end of the third heat exchanger. The second end of the third heat exchanger is connected to the inlet of the compressor.

[0007] Preferably, an oil separator and a three-way valve are sequentially installed between the compressor and the first and second heat exchangers; a liquid receiver and a dryer filter are sequentially installed between the first heat exchanger and the expansion valve; a check valve, a liquid receiver, and a dryer filter are sequentially installed between the second heat exchanger and the expansion valve; a liquid separator is installed between the expansion valve and the third heat exchanger; and a copper filter and a gas-liquid separator are sequentially installed between the third heat exchanger and the compressor.

[0008] Preferably, the three-way valve is a three-way electric ball valve, which controls the flow rate of refrigerant in the first and second heat exchangers during operation by adjusting the opening degree.

[0009] Preferably, the compressor is a variable frequency compressor.

[0010] Preferably, the expansion valve is an electronic expansion valve.

[0011] Preferably, the first heat exchanger is a shell-and-tube heat exchanger.

[0012] Preferably, the second and third heat exchangers are finned tube heat exchangers or microchannel heat exchangers.

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

[0014] Preferably, after the refrigerant flows out of the compressor outlet, it passes sequentially through an oil separator, a three-way valve, a second heat exchanger, a one-way valve, a liquid receiver, a dryer filter, an expansion valve, a liquid distributor, a third heat exchanger, a copper filter, and a gas-liquid separator before flowing back to the compressor to form a second compression refrigeration cycle.

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

[0016] 1. A water-cooled condenser is used instead of the air-cooled condenser commonly found in constant temperature and humidity air conditioners. This water-cooled condenser can be integrated into the unit, eliminating the need for a dedicated machine room to set up an air-cooled outdoor unit, thus saving floor space.

[0017] 2. Fewer connecting pipes to the outside of the unit, only the water outlet and inlet pipes of the water-cooled condenser remain, simplifying the pipe installation work and reducing the difficulty of subsequent maintenance and repair;

[0018] 3. Water-cooled condensers have a higher energy efficiency ratio and lower energy consumption during operation compared to air-cooled condensers, achieving further energy savings compared to existing constant temperature and humidity air conditioning units. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the system flow of a water-cooled condensing and reheating unit according to the present invention.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Compressor; 2. Gas-liquid separator; 3. Oil separator; 4. Three-way valve; 5. First heat exchanger; 6. Second heat exchanger; 7. Check valve; 8. Liquid receiver; 9. Dryer filter; 10. Expansion valve; 11. Liquid distributor; 12. Third heat exchanger; 13. Copper filter. Detailed Implementation

[0023] 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.

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figure 1 As shown, a water-cooled condensing and reheating unit includes a compressor 1, a first heat exchanger 5, a second heat exchanger 6, an expansion valve 10, and a third heat exchanger 12. The compressor 1 is a variable frequency compressor used to regulate the refrigerant flow in the pipeline. The outlet of the compressor 1 is connected to the first end of the first heat exchanger 5 and the first end of the second heat exchanger 6. The first heat exchanger 5 is a shell-and-tube heat exchanger, and the second heat exchanger 6 is a finned tube heat exchanger or a microchannel heat exchanger. The second end of the first heat exchanger 5 and the second end of the second heat exchanger 6 are both connected to the first end of the expansion valve 10. The expansion valve 10 is an electronic expansion valve used for refrigerant throttling. The second end of the expansion valve 10 is connected to the first end of the third heat exchanger 12. The third heat exchanger 12 is a finned tube heat exchanger or a microchannel heat exchanger, and the second end of the third heat exchanger 12 is connected to the inlet of the compressor 1.

[0026] Furthermore: An oil separator 3 and a three-way valve 4 are sequentially installed between the compressor 1 and the first heat exchanger 5 and the second heat exchanger 6. The three-way valve 4 is a three-way electric ball valve, which controls the flow rate of refrigerant in the first heat exchanger 5 and the second heat exchanger 6 during operation by adjusting the opening degree. A liquid receiver 8 and a dryer filter 9 are sequentially installed between the first heat exchanger 5 and the expansion valve 10. A one-way valve 7, a liquid receiver 8, and a dryer filter 9 are sequentially installed between the second heat exchanger 6 and the expansion valve 10. A liquid distributor 11 is installed between the expansion valve 10 and the third heat exchanger 12. A copper filter 13 and a gas-liquid separator 2 are sequentially installed between the third heat exchanger 12 and the compressor 1.

[0027] Furthermore: After the refrigerant flows out of the compressor 1 outlet, it passes through the oil separator 3, three-way valve 4, first heat exchanger 5, liquid receiver 8, dryer filter 9, expansion valve 10, liquid distributor 11, third heat exchanger 12, copper filter 13, and gas-liquid separator 2 in sequence before flowing back to the compressor 1 to form the first compression refrigeration cycle.

[0028] Furthermore: After the refrigerant flows out of the compressor 1 outlet, it passes through the oil separator 3, three-way valve 4, second heat exchanger 6, one-way valve 7, liquid receiver 8, dryer filter 9, expansion valve 10, liquid distributor 11, third heat exchanger 12, copper filter 13, and gas-liquid separator 2 in sequence before flowing back to the compressor 1 to form the second compression refrigeration cycle.

[0029] Working principle: It has two modes: conventional cooling mode and cooling and condensing heat recovery mode. When running in conventional cooling mode, the three-way valve 4 completely cuts off the refrigerant passage to the second heat exchanger 6. The second heat exchanger 6 does not participate in the refrigerant circulation. Only the first heat exchanger 5 participates in the refrigerant circulation as a condenser. The indoor air to be treated is cooled and dehumidified by the cooling of the third heat exchanger 12. It is suitable for cooling and dehumidification under general needs.

[0030] When operating in refrigeration and condensing heat recovery mode, the three-way valve 4 opens two channels, and both the first heat exchanger 5 and the second heat exchanger 6 participate in the refrigerant circulation, forming a condensing radiator together. The indoor air to be treated is cooled and dehumidified by the third heat exchanger 12, and then reheated by the second heat exchanger 6. At the same time, the opening of the three-way valve 4 can be adjusted to control the heating capacity of the second heat exchanger 6, thereby meeting the needs of different operating conditions and achieving constant temperature and humidity. In this mode, the second heat exchanger 6 acts as a reheater, recovering the condensing heat of the system and replacing the function of electric heating to reheat the air to be treated, thus achieving energy saving and consumption reduction.

[0031] 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 and reheating unit, characterized in that: The system includes a compressor (1), a first heat exchanger (5), a second heat exchanger (6), an expansion valve (10), and a third heat exchanger (12). The outlet of the compressor (1) is connected to the first end of the first heat exchanger (5) and the first end of the second heat exchanger (6). The second ends of the first heat exchanger (5) and the second heat exchanger (6) are connected to the first end of the expansion valve (10). The second end of the expansion valve (10) is connected to the first end of the third heat exchanger (12). The second end of the third heat exchanger (12) is connected to the inlet of the compressor (1).

2. The water-cooled condensing and reheating unit according to claim 1, characterized in that: An oil separator (3) and a three-way valve (4) are sequentially arranged between the compressor (1) and the first heat exchanger (5) and the second heat exchanger (6). A liquid receiver (8) and a dryer filter (9) are sequentially arranged between the first heat exchanger (5) and the expansion valve (10). A one-way valve (7), the liquid receiver (8), and the dryer filter (9) are sequentially arranged between the second heat exchanger (6) and the expansion valve (10). A liquid separator (11) is arranged between the expansion valve (10) and the third heat exchanger (12). A copper filter (13) and a gas-liquid separator (2) are sequentially arranged between the third heat exchanger (12) and the compressor (1).

3. A water-cooled condensing and reheating unit according to claim 2, characterized in that: The three-way valve (4) is a three-way electric ball valve, which controls the flow rate of refrigerant in the first heat exchanger (5) and the second heat exchanger (6) during operation by adjusting the opening degree.

4. A water-cooled condensing and reheating unit according to claim 1, characterized in that: The compressor (1) is a variable frequency compressor.

5. A water-cooled condensing and reheating unit according to claim 1, characterized in that: The expansion valve (10) is an electronic expansion valve.

6. A water-cooled condensing and reheating unit according to claim 1, characterized in that: The first heat exchanger (5) is a shell-and-tube heat exchanger.

7. A water-cooled condensing and reheating unit according to claim 1, characterized in that: The second heat exchanger (6) and the third heat exchanger (12) are finned tube heat exchangers or microchannel heat exchangers.

8. A water-cooled condensing and reheating unit according to claim 2, characterized in that: After the refrigerant flows out of the compressor (1), it passes through the oil separator (3), the three-way valve (4), the first heat exchanger (5), the liquid receiver (8), the dryer filter (9), the expansion valve (10), the liquid distributor (11), the third heat exchanger (12), the copper filter (13), and the gas-liquid separator (2) in sequence before flowing back to the compressor (1) to form the first compression refrigeration cycle.

9. A water-cooled condensing and reheating unit according to claim 2, characterized in that: After the refrigerant flows out of the compressor (1) outlet, it passes through the oil separator (3), the three-way valve (4), the second heat exchanger (6), the one-way valve (7), the liquid receiver (8), the dryer filter (9), the expansion valve (10), the liquid distributor (11), the third heat exchanger (12), the copper filter (13), and the gas-liquid separator (2) in sequence before flowing back to the compressor (1) to form the second compression refrigeration cycle.

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