Condenser anti-freezing device and refrigerator comprising same

Abstract

The utility model provides a condenser anti-freezing device and a refrigerator comprising the same, the condenser anti-freezing device comprises a condenser body, the condenser body is provided with a circulating water inlet and a circulating water outlet, and the circulating water inlet and the circulating water outlet are respectively connected with a circulating water pipeline. A first control valve and a second control valve are installed on pipelines of the circulating water inlet and the circulating water outlet respectively, an air inlet and a water outlet are further formed in the condenser body, the air inlet is connected with an air compression mechanism through an air inlet pipeline, a water outlet pipeline is installed on the water outlet, and a third control valve and a fourth control valve are arranged at the air inlet and the water outlet respectively. The condenser anti-freezing device can realize no water residue in the condenser tube nest, solves the problem of circulating water residue in the condenser tube nest, and further avoids the problem of low-temperature frost crack of the condenser tube nest.

Description

Technical Field

[0001] This utility model relates to a condenser antifreeze device and a refrigeration machine containing the same. Background Technology

[0002] Industrial chillers are a common type of refrigeration equipment used in industrial production, widely applied in fields such as biology, medicine, and chemical manufacturing. They provide stable and efficient low-temperature environments for production. A typical industrial chiller consists of five main parts connected in series: a compressor, condenser, evaporator, dryer filter, and expansion valve. Depending on the cooling method of the condenser, they are classified as air-cooled or water-cooled. Compared to air cooling, water cooling can remove heat more quickly, achieving a rapid cooling effect.

[0003] Water-cooled chillers have high requirements for the operating environment, especially in northern winters. When shutting down, the condenser needs to be drained. If the circulating water is not completely drained, the remaining water will freeze at low temperatures, which can cause the condenser tubes to crack, leading to increased maintenance costs. How to ensure that the condenser tubes do not freeze and crack during winter shutdown is a problem that needs to be solved. Traditional drainage methods are often insufficient to guarantee that no water remains in the tubes. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect that the condenser tubes of the water-cooled refrigerator are prone to freezing and cracking in winter due to residual water inside, and to provide a condenser antifreeze device and a refrigerator containing the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] This utility model provides a condenser antifreeze device, including a condenser body. The condenser body is provided with a circulating water inlet and a circulating water outlet, which are respectively connected to a circulating water pipe. A first control valve and a second control valve are respectively installed on the circulating water inlet and the circulating water outlet pipe. The condenser body is also provided with an air inlet and a drain outlet. The air inlet is connected to an air compression mechanism through an air inlet pipe, and a drain pipe is installed on the drain outlet. A third control valve and a fourth control valve are respectively provided at the air inlet and the drain outlet.

[0007] In this solution, by installing an air inlet and a drain outlet on the condenser body, when it is necessary to drain the water from the condenser, the first and second control valves on the circulating water inlet and outlet pipes are first closed to prevent external circulating water from entering the condenser. Then, the third control valve is opened. After the pressure inside the condenser body reaches a certain value, the fourth control valve is opened, allowing residual water in the condenser tubes to be automatically drained from the pipes under pressure. This process is repeated multiple times until no water is discharged from the drain outlet. This condenser antifreeze device ensures that there is no water residue in the condenser tubes, solving the problem of residual circulating water in the condenser tubes and thus preventing the condenser tubes from freezing and cracking at low temperatures.

[0008] Preferably, the first control valve, the second control valve, the third control valve, and the fourth control valve are all automatic control valves.

[0009] In this scheme, the first control valve, the second control valve, the third control valve and the fourth control valve are set as automatic control valves to facilitate remote control.

[0010] Preferably, the condenser antifreeze device further includes a controller, which is connected to the first control valve, the second control valve, the third control valve and the fourth control valve respectively, and is used to control the opening or closing of the first control valve, the second control valve, the third control valve and the fourth control valve.

[0011] In this solution, remote control via a controller eliminates the need for on-site personnel and allows for timely operation.

[0012] Preferably, a first sensor is provided at the drain outlet. The first sensor is used to detect whether there is liquid in the condenser body. The first sensor is connected to the controller, and the controller is used to receive first feedback information from the first sensor.

[0013] The controller is also connected to the air compressor mechanism and is used to control the air compressor mechanism to turn on or off.

[0014] In this scheme, the presence of liquid within the condenser body is detected by a first sensor to control the opening or closing of the air compression mechanism.

[0015] Preferably, the condenser antifreeze device further includes a pressure monitoring mechanism for monitoring the pressure within the condenser body.

[0016] Preferably, the pressure monitoring mechanism is connected to the controller, and the controller is used to receive second feedback information from the pressure monitoring mechanism.

[0017] Preferably, the condenser antifreeze device further includes a heating mechanism, which is disposed between the air compression mechanism and the condenser body, and is used to heat the air in the intake pipe.

[0018] In this solution, heating the air entering the condenser by a heating mechanism can accelerate the evaporation of liquid within the condenser and speed up the removal of moisture.

[0019] Preferably, the heating mechanism is an electric heating mechanism.

[0020] Preferably, the condenser antifreeze device further includes a filter mechanism located at one end of the air inlet of the air compression mechanism, and the filter mechanism is used to filter air.

[0021] In this solution, the filtration mechanism can prevent impurities in the air from entering the condenser and affecting its subsequent operation.

[0022] This utility model also provides a freezer, which includes the condenser antifreeze device described above.

[0023] The significant advantages of this invention are as follows: By installing an air inlet and a drain outlet on the condenser body, when it is necessary to drain the water from the condenser, the first and second control valves on the circulating water inlet and outlet pipes are first closed to prevent external circulating water from entering the condenser. Then, the third control valve is opened. Once the pressure inside the condenser body reaches a certain value, the fourth control valve is opened, allowing residual water in the condenser tubes to be automatically drained from the pipes under pressure. This process is repeated multiple times until no water is discharged from the drain outlet. This condenser antifreeze device ensures that there is no water residue in the condenser tubes, solving the problem of residual circulating water in the condenser tubes and thus preventing the condenser tubes from freezing and cracking at low temperatures. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the condenser antifreeze device in an embodiment of this utility model.

[0025] Figure 2 These are side views of both ends of the condenser in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] The components include: condenser body 100, circulating water inlet 110, first control valve 111, circulating water outlet 120, second control valve 121, air inlet 130, third control valve 131, drain outlet 140, fourth control valve 141, circulating water pipe 200, air inlet pipe 300, drain pipe 400, air compression mechanism 500, pressure monitoring mechanism 600, heating mechanism 700, and filter mechanism 800. Detailed Implementation

[0028] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0029] like Figure 1-2 As shown, this embodiment discloses a condenser antifreeze device, including a condenser body 100. The condenser body 100 is provided with a circulating water inlet 110 and a circulating water outlet 120, which are respectively connected to a circulating water pipe 200. A first control valve 111 and a second control valve 121 are respectively installed on the circulating water inlet 110 and the circulating water outlet 120. The condenser body 100 is also provided with an air inlet 130 and a drain outlet 140. The air inlet 130 is connected to an air compressor 500 through an air inlet pipe 300, and a drain pipe 400 is installed on the drain outlet 140. A third control valve 131 and a fourth control valve 141 are respectively provided at the air inlet 130 and the drain outlet 140. The circulating water pipe 200, the air inlet pipe 300, and the drain pipe 400 are conventional pipe diameters, designed according to the actual standard requirements of the production pipeline, such as DN25 and DN30.

[0030] This condenser antifreeze device uses an air inlet 130 and a drain outlet 140 on the condenser body 100. When it is necessary to drain the water from the condenser, the first control valve 111 and the second control valve 121 on the circulating water inlet 110 and circulating water outlet 120 are closed to prevent external circulating water from entering the condenser. Then, the third control valve 131 is opened. After the pressure inside the condenser body 100 reaches a certain value, the fourth control valve 141 is opened, allowing residual water in the condenser tubes to be automatically drained from the pipes under pressure. This process is repeated multiple times until no water is discharged from the drain outlet 140. This condenser antifreeze device ensures that there is no water residue in the condenser tubes, solving the problem of residual circulating water in the condenser tubes and thus preventing the condenser tubes from freezing and cracking at low temperatures.

[0031] In this embodiment, the first control valve 111, the second control valve 121, the third control valve 131, and the fourth control valve 141 are all automatic control valves. Setting these valves as automatic control valves facilitates remote control. These control valves can be electrically operated or pneumatically operated, with pneumatic control valves being preferred. In some other embodiments, manual valves can also be selected.

[0032] In this embodiment, the condenser antifreeze device also includes a controller, which is connected to the first control valve 111, the second control valve 121, the third control valve 131, and the fourth control valve 141 respectively. The controller is used to control the opening or closing of the first control valve 111, the second control valve 121, the third control valve 131, and the fourth control valve 141. Remote control via the controller avoids the need for personnel to go to the site for operation and allows for timely control.

[0033] In this embodiment, a first sensor is provided at the drain outlet 140. The first sensor is used to detect whether there is liquid inside the condenser body 100. The first sensor is connected to a controller, which is used to receive first feedback information from the first sensor. The controller is also connected to the air compression mechanism 500 and is used to control the air compression mechanism 500 to open or close. The first sensor detects whether there is liquid inside the condenser body 100 to control the opening or closing of the air compression mechanism 500.

[0034] Specifically, the first sensor can be a humidity sensor to determine whether the water inside the condenser body 100 is clean by detecting the humidity inside the condenser body 100. When the first sensor detects that there is still water inside the condenser body 100, it can transmit the detected information to the controller. The controller, according to a preset instruction, controls the air compressor mechanism 500 to start and continue to circulate air to the condenser body 100, and opens the drain port 140 to drain the water inside the condenser body 100. When the first sensor detects that there is no water inside the condenser body 100, it can transmit the detected information to the controller. The controller, according to a preset instruction, controls the air compressor mechanism 500 to shut off, and closes the air inlet 130 and drain port 140 of the condenser body 100 through the third control valve 131 and the fourth control valve 141.

[0035] In this embodiment, the condenser antifreeze device further includes a pressure monitoring mechanism 600, which monitors the pressure inside the condenser body 100. The pressure monitoring mechanism 600 is connected to a controller, which receives second feedback information from the pressure monitoring mechanism 600.

[0036] When the condenser antifreeze device is working, first close the drain port 140, and then supply air to the condenser body 100 through the air inlet 130. After the air pressure inside the condenser body 100 reaches the preset pressure, for example, 0.1 to 0.4 MPa, first control the third control valve 131 to close the air inlet 130, and then control the fourth control valve 141 to open the drain port 140. The residual water in the condenser tubes will be discharged under pressure. This cycle is repeated 3 to 5 times until no water is discharged from the drain port 140.

[0037] In this embodiment, the condenser antifreeze device further includes a heating mechanism 700, which is located between the air compression mechanism 500 and the condenser body 100. The heating mechanism 700 is used to heat the air in the intake pipe 300. By heating the air entering the condenser through the heating mechanism 700, the evaporation of liquid in the condenser body 100 can be accelerated, and the removal of moisture can be accelerated. The heating mechanism 700 is an electric heating mechanism 700.

[0038] In some other embodiments, the heating mechanism 700 may not be provided, or the heating mechanism 700 may be located before the air inlet of the air compression mechanism 500. The heating mechanism 700 may also employ other types of heating methods.

[0039] In this embodiment, the condenser antifreeze device further includes a filter mechanism 800, which is located at the air inlet of the air compression mechanism 500 and is used to filter air. The filter mechanism 800 prevents impurities in the air from entering the condenser and affecting its subsequent operation.

[0040] This utility model embodiment also provides a freezer, which includes the above-described condenser antifreeze device. The freezer is a water-cooled industrial freezer.

[0041] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A condenser antifreeze device, comprising a condenser body, wherein the condenser body is provided with a circulating water inlet and a circulating water outlet, the circulating water inlet and the circulating water outlet are respectively connected to a circulating water pipe, and a first control valve and a second control valve are respectively installed on the circulating water inlet and the circulating water outlet pipe, characterized in that, The condenser body is also provided with an air inlet and a drain outlet. The air inlet is connected to an air compression mechanism through an air inlet pipe, and a drain pipe is installed on the drain outlet. A third control valve and a fourth control valve are respectively provided at the air inlet and the drain outlet.

2. The condenser antifreeze device as described in claim 1, characterized in that, The first control valve, the second control valve, the third control valve, and the fourth control valve are all automatic control valves.

3. The condenser antifreeze device as described in claim 2, characterized in that, The condenser antifreeze device also includes a controller, which is connected to the first control valve, the second control valve, the third control valve and the fourth control valve respectively. The controller is used to control the opening or closing of the first control valve, the second control valve, the third control valve and the fourth control valve.

4. The condenser antifreeze device as described in claim 3, characterized in that, A first sensor is provided at the drain outlet. The first sensor is used to detect whether there is liquid in the condenser body. The first sensor is connected to the controller. The controller is used to receive the first feedback information from the first sensor. The controller is also connected to the air compressor mechanism and is used to control the air compressor mechanism to turn on or off.

5. The condenser antifreeze device as described in claim 4, characterized in that, The condenser antifreeze device also includes a pressure monitoring mechanism, which is used to monitor the pressure inside the condenser body.

6. The condenser antifreeze device as described in claim 5, characterized in that, The pressure monitoring mechanism is connected to the controller, and the controller is used to receive second feedback information from the pressure monitoring mechanism.

7. The condenser antifreeze device as described in claim 1, characterized in that, The condenser antifreeze device also includes a heating mechanism, which is located between the air compression mechanism and the condenser body. The heating mechanism is used to heat the air in the intake pipe.

8. The condenser antifreeze device as described in claim 7, characterized in that, The heating mechanism is an electric heating mechanism.

9. The condenser antifreeze device as described in claim 1, characterized in that, The condenser antifreeze device also includes a filter mechanism, which is located at one end of the air inlet of the air compression mechanism and is used to filter air.

10. A refrigeration unit, characterized in that, The refrigeration unit includes a condenser antifreeze device as described in any one of claims 1-9.

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