Toner powder processing air cooling heat exchange device capable of realizing non-stop defrosting

Abstract

The utility model discloses a powdered ink processing air cooling heat exchange device capable of realizing non-stop defrosting, which comprises two gas-liquid heat exchangers, and each gas-liquid heat exchanger is provided with an airflow inlet pipe, an airflow outlet pipe, a refrigerant inlet pipe and a refrigerant outlet pipe; a gas flow inlet pipe of the gas-liquid heat exchanger is connected with a gas feeding pipe through a three-way reversing valve A, and a gas flow outlet pipe of the gas-liquid heat exchanger is connected with an exhaust pipe through a three-way reversing valve B; the refrigerant inlet pipe is connected with a refrigerant liquid supply pipe through a three-way reversing valve C, and the refrigerant outlet pipe is connected with a refrigerant return pipe through a three-way reversing valve D. Through switching of the three-way reversing valve A, the three-way reversing valve B, the three-way reversing valve C and the three-way reversing valve D, airflow and a refrigerant alternately pass through the two gas-liquid heat exchangers, the frosted gas-liquid heat exchanger defrosts during the alternating period, and the other gas-liquid heat exchanger can guarantee continuous air refrigeration. Therefore, non-stop defrosting is carried out.

Description

Technical Field

[0001] The utility model relates to an air cooling heat exchange device, in particular to an air cooling heat exchange device for toner processing which can realize non-stop defrosting. Background Art

[0002] Toner is the carbon powder used in printers. Its particle size is required to reach the micron level, so it is generally processed by air flow grinding or mechanical grinding. During the processing, the temperature will increase due to mutual friction. However, if the outlet temperature is higher than 30 degrees, the toner will denature.

[0003] Therefore, in order to reduce the outlet temperature, very low-temperature air is used to carry the toner into the grinding equipment. The air is cooled by the air cooling heat exchange device. The refrigerant temperature of the air cooling heat exchange device is as low as -15°C to -20°C. Since the airflow is not completely dry, it will cause frost inside the air cooling heat exchange device after a long working time. After frosting, not only the air resistance increases, the fan needs to consume more power, but also the frost covers the heat exchange surface, the heat exchange rate is reduced, which will lead to a decrease in the cooling effect of the air, thereby consuming more energy for refrigeration. At this time, the only way to defrost is to shut down the machine. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a toner processing air cooling and heat exchanging device capable of realizing non-stop defrosting, so as to solve the technical problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A toner processing air cooling heat exchange device capable of achieving non-stop defrosting comprises two gas-liquid heat exchangers, wherein the gas-liquid heat exchangers are provided with an air flow inlet pipe, an air flow outlet pipe, a refrigerant inlet pipe and a refrigerant outlet pipe; the air flow inlet pipes of the gas-liquid heat exchangers are respectively connected to an air supply pipe via a three-way reversing valve A, and the air flow outlet pipes are respectively connected to an exhaust pipe via a three-way reversing valve B; the refrigerant inlet pipes are respectively connected to a refrigerant liquid supply pipe via a three-way reversing valve C, and the refrigerant outlet pipes are respectively connected to a refrigerant return pipe via a three-way reversing valve D.

[0007] Furthermore, the three-way reversing valve A, the three-way reversing valve B, the three-way reversing valve C and the three-way reversing valve D are all electrically controlled valves.

[0008] Furthermore, the three-way reversing valve A and the three-way reversing valve B are controlled in linkage, and the three-way reversing valve C and the three-way reversing valve D are controlled in linkage.

[0009] Furthermore, the gas-liquid heat exchanger consists of an air intake hood, a heat exchange chamber, an exhaust hood and a jacket; the air intake hood and the exhaust hood are respectively connected to the two ends of the heat exchange chamber, the air intake hood is connected to the air flow inlet pipe, and the exhaust hood is connected to the refrigerant outlet pipe, and a number of heat exchange fins are horizontally welded on the peripheral wall of the heat exchange chamber along its length direction. The jacket is installed on the outer periphery of the heat exchange chamber, and the two ends of the jacket are respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe.

[0010] Advantages of the utility model:

[0011] The utility model switches three-way reversing valve A, three-way reversing valve B, three-way reversing valve C and three-way reversing valve D, so that airflow and refrigerant pass through two gas-liquid heat exchangers alternately. During the alternation, the frosted gas-liquid heat exchanger is defrosted, while the other gas-liquid heat exchanger can ensure continuous air cooling, thereby performing defrosting without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a cross-sectional view of the gas-liquid heat exchanger.

[0014] In the figure, 1-gas-liquid heat exchanger, 11-air inlet hood, 111-air flow inlet pipe, 12-heat exchange chamber, 121-heat exchange fins, 13-exhaust hood, 131-air flow outlet pipe, 14-jacket, 141-refrigerant inlet pipe, 142-refrigerant outlet pipe, 2-three-way reversing valve A, 21-air supply pipe, 3-three-way reversing valve B, 31-exhaust pipe, 4-three-way reversing valve C, 41-refrigerant liquid supply pipe, 5-three-way reversing valve D, 51-refrigerant return pipe. DETAILED DESCRIPTION

[0015] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] As shown in the figure:

[0017] A toner processing air cooling heat exchange device capable of achieving non-stop defrosting comprises two gas-liquid heat exchangers 1, wherein the gas-liquid heat exchanger 1 is provided with an air flow inlet pipe 111, an air flow outlet pipe 131, a refrigerant inlet pipe 141 and a refrigerant outlet pipe 142; the air flow inlet pipe 111 of the gas-liquid heat exchanger 1 is connected to the air supply pipe 21 via a three-way reversing valve A2, and the air flow outlet pipe 131 is connected to the exhaust pipe 31 via a three-way reversing valve B3; the refrigerant inlet pipe 141 is connected to the refrigerant liquid supply pipe 41 via a three-way reversing valve C4, and the refrigerant outlet pipe 142 is connected to the refrigerant return pipe 51 via a three-way reversing valve D5.

[0018] Working principle: By switching the three-way reversing valve A2, three-way reversing valve B3, three-way reversing valve C4, and three-way reversing valve D5, the airflow and refrigerant are passed through the same gas-liquid heat exchanger 1. When the working time is too long and the interior is frosted, the refrigerant is first switched to circulate in another gas-liquid heat exchanger 1 through the three-way reversing valve C4 and the three-way reversing valve D5 to pre-cool the other gas-liquid heat exchanger 1. Although the refrigerant in the previous gas-liquid heat exchanger 1 is no longer circulating, it can be maintained for a short time due to the low temperature. During this period, the internal temperature can also be appropriately increased, which also promotes defrosting.

[0019] When the temperature of the other gas-liquid heat exchanger 1 drops, the airflow is switched to the other gas-liquid heat exchanger 1 through the three-way reversing valve A2 and the three-way reversing valve B3, so that uninterrupted airflow cooling is performed. Since the refrigerant circulation of the previous gas-liquid heat exchanger 1 stops, the internal temperature will slowly rise, thereby removing the internal frost. The two gas-liquid heat exchangers 1 work alternately in sequence.

[0020] For the convenience of control, the three-way reversing valve A2, three-way reversing valve B3, three-way reversing valve C4 and three-way reversing valve D5 are all electrically controlled valves, and the three-way reversing valve A2 and the three-way reversing valve B3 are controlled in linkage, and the three-way reversing valve C4 and the three-way reversing valve D5 are controlled in linkage, so that the airflow and the inlet and outlet of the refrigerant are switched synchronously.

[0021] As an optimized solution, the gas-liquid heat exchanger 1 consists of an air intake hood 11, a heat exchange chamber 12, an exhaust hood 13 and a jacket 14; the air intake hood 11 and the exhaust hood 13 are respectively connected to the two ends of the heat exchange chamber 12, the air intake hood 11 is connected to the air flow inlet pipe 111, and the exhaust hood 13 is connected to the refrigerant outlet pipe 142. A number of heat exchange fins 121 are welded transversely along the length direction of the peripheral wall of the heat exchange chamber 12. The jacket 14 is installed on the outer periphery of the heat exchange chamber 12, and the two ends of the jacket 14 are respectively connected to the refrigerant inlet pipe 141 and the refrigerant outlet pipe 142. The fins of the gas-liquid heat exchanger 1 with this structure are inversely parallel to the airflow, and the damping is smaller. Of course, other existing gas-liquid heat exchangers 1 with other structures can also be used.

[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A toner processing air cooling and heat exchange device capable of achieving non-stop defrosting, characterized in that: It includes two gas-liquid heat exchangers, which are provided with an air flow inlet pipe, an air flow outlet pipe, a refrigerant inlet pipe and a refrigerant outlet pipe; the air flow inlet pipe of the gas-liquid heat exchanger is connected to the air supply pipe through a three-way reversing valve A, and the air flow outlet pipe is connected to the exhaust pipe through a three-way reversing valve B; the refrigerant inlet pipe is connected to the refrigerant liquid supply pipe through a three-way reversing valve C, and the refrigerant outlet pipe is connected to the refrigerant return pipe through a three-way reversing valve D.

2. The toner processing air cooling and heat exchange device capable of achieving non-stop defrosting according to claim 1, characterized in that: The three-way reversing valve A, the three-way reversing valve B, the three-way reversing valve C and the three-way reversing valve D are all electrically controlled valves.

3. The toner processing air cooling and heat exchange device capable of achieving non-stop defrosting according to claim 2, characterized in that: The three-way reversing valve A is linked to the three-way reversing valve B for control, and the three-way reversing valve C is linked to the three-way reversing valve D for control.

4. The toner processing air cooling and heat exchange device capable of achieving non-stop defrosting according to any one of claims 1 to 3, characterized in that: The gas-liquid heat exchanger consists of an air intake hood, a heat exchange chamber, an exhaust hood and a jacket; the air intake hood and the exhaust hood are respectively connected to the two ends of the heat exchange chamber, the air intake hood is connected to the air flow inlet pipe, and the exhaust hood is connected to the refrigerant outlet pipe. A number of heat exchange fins are horizontally welded on the peripheral wall of the heat exchange chamber along its length direction. The jacket is installed on the outer periphery of the heat exchange chamber, and the two ends of the jacket are respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe.

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