Water-cooled oil injection screw air compressor with heat energy recovery device

Abstract

The utility model discloses a water-cooled oil injection screw air compressor with a heat energy recovery device, which at least comprises a compressor unit and an oil-gas separation tank, and further comprises a heat recovery heat exchanger, a first flow channel and a second flow channel are integrated in the heat recovery heat exchanger, and the input end and the output end of the first flow channel are connected with a delivery pipe. The conveying pipe is sequentially provided with a first valve, a second valve and a third valve from the input end to the output end of the first flow channel; the oil liquid output end of the oil-gas separation tank is connected with an output pipe; the output end of the output pipe is communicated with the conveying pipe between the first valve and the second valve; the conveying pipe between the second valve and the third valve is connected with a conveying mechanism which is used for being connected with a compressor unit to supply oil. By means of the heat recovery heat exchanger, the phenomenon that the service life of the machine is affected due to the fact that the heat recovery heat exchanger is additionally arranged by a client, and the machine operates at the temperature lower than normal temperature can be avoided.

Description

Technical Field

[0001] The utility model relates to a water-cooled oil-injected screw air compressor with a heat energy recovery device. Background Art

[0002] The prior art, such as the Chinese utility model patent document with the publication number CN217783720U, discloses an air compressor with a heat recovery interface, which includes a chassis. A compressor body is provided on the chassis. The compressor body has an air inlet, an output end, and a liquid return port. An air-liquid separator is provided on the chassis. The air-liquid separator has an input end, a gas output end, and a liquid output end. A first conduit is connected between the output end of the compressor body and the input end of the air-liquid separator. A radiator is further provided above the chassis. The radiator internally has a first flow channel and a second flow channel respectively. The gas output end is connected to the input end of the first flow channel through a second conduit. The liquid output end is connected to the input end of the second flow channel through a third conduit. The output end of the second flow channel is connected to the liquid return port of the compressor body through a fourth conduit. A heat energy output pipe and a heat energy recovery pipe are respectively connected to the third conduit. A first valve body is provided on the heat energy output pipe. A second valve body is provided on the heat energy recovery pipe. A third valve body is installed on the third conduit.

[0003] Based on the above, in the prior art, a heat energy recovery pipe is reserved for the user to add a heat energy recovery device by himself during later use. Although this structure can facilitate the user to add a heat energy recovery device later, it has the problem that it needs to be modified by the user himself. The modification requires time and money and cannot meet the user's needs. At the same time, adding a heat recovery device by oneself easily causes the machine to operate below the normal temperature and affects the life of the machine. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a water-cooled oil-injected screw air compressor with a heat energy recovery device.

[0005] A water-cooled oil-injected screw air compressor with a heat energy recovery device designed according to this purpose includes at least a compressor unit and an oil-gas separation tank, and further includes a heat recovery heat exchanger. The heat recovery heat exchanger internally integrates a first flow channel and a second flow channel. A conveying pipe is connected between the input end and the output end of the first flow channel. A first valve, a second valve, and a third valve are sequentially installed on the conveying pipe from the input end to the output end of the first flow channel.

[0006] The oil liquid output end of the oil-gas separation tank is connected to an output pipe, and the output end of the output pipe is communicated with the conveying pipe between the first valve and the second valve.

[0007] A conveying mechanism is connected to the conveying pipe between the second valve and the third valve, and the conveying mechanism is used to connect to the compressor unit to supply oil.

[0008] Preferably, an input pipe is connected to the input end of the second flow channel of the heat recovery heat exchanger, an output pipe is connected to the output end of the second flow channel of the heat recovery heat exchanger, and a fourth valve is installed on the output pipe.

[0009] Preferably, the conveying mechanism includes an oil heat exchanger, and a third flow channel and a fourth flow channel are integrated in the oil heat exchanger;

[0010] The input end of the third flow channel is connected to a first conduit, the first conduit is connected to the conveying pipe between the second valve and the third valve, and the output end of the third flow channel is connected to a second conduit;

[0011] The second conduit is used to connect to the compressor unit to supply oil.

[0012] Preferably, an air heat exchanger is further included, and a fifth flow channel and a sixth flow channel are integrated inside the air heat exchanger;

[0013] The air output end of the oil-gas separation tank is connected to a third conduit, the third conduit is connected to the input end of the fifth flow channel, and the output end of the fifth flow channel is used to output gas;

[0014] The input end of the fourth flow channel is connected to a cold water input pipe, the output end of the fourth flow channel is connected to a cold water output pipe, the cold water output pipe is connected to a three-way valve, the second port of the three-way valve is connected to a fourth conduit, the fourth conduit is connected to the input end of the sixth flow channel, the output end of the sixth flow channel is connected to a cold water return pipe, the cold water input pipe is connected to a bypass pipe, and the bypass pipe is connected to the third port of the three-way valve.

[0015] Compared with the prior art, the utility model further includes a heat recovery heat exchanger, wherein the heat recovery heat exchanger has a first flow channel and a second flow channel integrated therein, the input end and the output end of the first flow channel are connected to a delivery pipe, and the delivery pipe is sequentially installed with a first valve, a second valve, and a third valve from the input end to the output end of the first flow channel; the oil output end of the oil-gas separation tank is connected to an output pipe, and the output end of the output pipe is connected to the delivery pipe between the first valve and the second valve; the delivery pipe between the second valve and the third valve is connected to a delivery mechanism, and the delivery mechanism is used to connect to the compressor unit for oil supply. The utility model has a built-in heat recovery heat exchanger, and in normal use when heat recovery is not required, the first valve and the third valve are closed, and the second valve is opened, and the oil output from the output pipe flows directly to the delivery mechanism through the delivery pipe to supply the compressor unit. When recovering heat energy, the first valve and the third valve are opened, the second valve is closed, and the oil output from the output pipe is input into the first flow channel of the heat recovery heat exchanger through the delivery pipe. In this process, the oil in the first flow channel exchanges heat with the heat exchange material in the second flow channel to take away the heat in the oil. The oil after the heat exchange is transported from the delivery pipe to the delivery mechanism to supply the compressor unit. The utility model can prevent customers from adding a heat recovery heat exchanger on their own, causing the machine to run at a temperature lower than normal, thus affecting the life of the machine. At the same time, the recovery heat exchanger recovers part of the heat energy, which can extend the maintenance cycle of the oil heat exchanger and reduce the frequency of the oil heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is one of the three-dimensional structural schematic diagrams of the air compressor;

[0017] Figure 2 The second is a schematic diagram of the three-dimensional structure of an air compressor;

[0018] Figure 3 The third is a schematic diagram of the three-dimensional structure of an air compressor;

[0019] Figure 4 This is the fourth schematic diagram of the three-dimensional structure of the air compressor. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] See also Figures 1 - 4, A water-cooled oil-injected screw air compressor with a heat recovery device, at least including a compressor unit 40 and an oil-gas separation tank 20, further including a heat recovery heat exchanger 10. The heat recovery heat exchanger 10 internally integrates a first flow channel and a second flow channel. One delivery pipe 110 is connected to the input end and the output end of the first flow channel. The delivery pipe 110 is successively installed with a first valve 120, a second valve 130, and a third valve 140 from the input end to the output end of the first flow channel;

[0022] The oil output end of the oil-gas separation tank 20 is connected with an output pipe 150, and the output end of the output pipe 150 is communicated with the delivery pipe 110 between the first valve 120 and the second valve 130;

[0023] A delivery mechanism 30 is connected to the delivery pipe 110 between the second valve 130 and the third valve 140. The delivery mechanism 30 is used to connect with the compressor unit 40 for oil supply.

[0024] Based on the above embodiment, during normal use when heat recovery is not required, the first valve and the third valve are closed, and the second valve is opened. The oil output from the output pipe flows directly through the delivery pipe to the delivery mechanism for supply to the compressor unit.

[0025] When heat energy is recovered, the first valve and the third valve are opened, and the second valve is closed. The oil output from the output pipe is input into the first flow channel of the heat recovery heat exchanger through the delivery pipe. During this process, the oil in the first flow channel exchanges heat with the heat exchange substance in the second flow channel to take away the heat in the oil. The oil after heat exchange is transported from the delivery pipe to the delivery mechanism for supply to the compressor unit.

[0026] By self-equipping with a heat recovery heat exchanger, the present utility model can prevent the machine from operating at a temperature lower than normal due to the customer adding a heat recovery heat exchanger by themselves, which affects the service life of the machine. At the same time, the recovery heat exchanger recovers part of the heat energy, which can extend the maintenance period of the oil heat exchanger and reduce the frequency of the oil heat exchanger.

[0027] See Figure 1 , An input pipe 170 is connected to the input end of the second flow channel of the heat recovery heat exchanger 10, and an output pipe 180 is connected to the output end of the second flow channel of the heat recovery heat exchanger 10. A fourth valve 190 is installed on the output pipe 180. The function of the fourth valve 190 is to control the flow rate of the heat exchange substance according to the heat exchange demand, so as to control the flow rate of the heat exchange substance passing through the second flow channel to control the heat exchange efficiency.

[0028] See Figure 2 and Figure 3 , The delivery mechanism 30 includes an oil heat exchanger 310. The oil heat exchanger 310 internally integrates a third flow channel and a fourth flow channel;

[0029] The input end of the third flow channel is connected with a first conduit 320. The first conduit 320 is connected with a delivery pipe 110 between the second valve 130 and the third valve 140. The output end of the third flow channel is connected with a second conduit 330.

[0030] The second conduit 330 is used to connect with the compressor unit 40 to supply oil.

[0031] The oil output through the delivery pipe 110 enters the third flow channel of the oil heat exchanger 310 under the action of the first conduit 320. In this process, the oil in the third flow channel exchanges heat with the cold water in the fourth flow channel to reduce the oil temperature, and then the oil is transported to the compressor unit 40 through the second conduit 330.

[0032] Refer to 2 and Figure 3 , and further includes an air heat exchanger 50. The air heat exchanger 50 internally integrates a fifth flow channel and a sixth flow channel.

[0033] The air output end of the oil-gas separation tank 20 is connected with a third conduit 510. The third conduit 510 is connected with the input end of the fifth flow channel. The output end of the fifth flow channel is used to output gas.

[0034] The input end of the fourth flow channel is connected with a cold water input pipe 340. The output end of the fourth flow channel is connected with a cold water output pipe 350. The cold water output pipe 350 is connected with a three-way valve 540. The second port of the three-way valve 540 is connected with a fourth conduit 520. The fourth conduit 520 is connected with the input end of the sixth flow channel. The output end of the sixth flow channel is connected with a cold water return pipe 550. The cold water input pipe 340 is connected with a bypass pipe 530. The bypass pipe 530 is connected with the third port of the three-way valve 540.

[0035] Based on the above embodiments, by setting the three-way valve 540, when the oil heat exchanger 310 reduces the oil temperature to the normal operating temperature of the machine, control the three-way valve 540 to make the bypass pipe 530 communicate with the fourth conduit 520. At this time, a part of the cold water input from the cold water input pipe 340 will be diverted to the fourth conduit 520 to be directly input into the air heat exchanger 50. Through the switching control of the three-way valve 540, the distribution of cold water can be controlled in real time when the heat recovery heat exchanger 10 recovers heat energy to meet the heat exchange quantity requirement. Avoid all the cold water entering the oil heat exchanger 310 and avoid the oil temperature being too low. It can reduce the heat exchange quantity of the oil heat exchanger 310 and raise the oil temperature of the machine to the normal value.

[0036] Furthermore, the three-way valve 540 adopts an electric proportional regulating valve.

[0037] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0039] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A water-cooled oil-injected screw air compressor with a heat recovery device, comprising at least a compressor unit (40) and an oil-gas separation tank (20), characterized in that: Also included is a heat recovery heat exchanger (10), wherein the heat recovery heat exchanger (10) has a first flow channel and a second flow channel integrated therein, the input end and the output end of the first flow channel are connected to a delivery pipe (110), and the delivery pipe (110) is sequentially installed with a first valve (120), a second valve (130), and a third valve (140) from the input end to the output end of the first flow channel; The oil output end of the oil-gas separation tank (20) is connected to an output pipe (150), and the output end of the output pipe (150) is connected to the delivery pipe (110) between the first valve (120) and the second valve (130); The delivery pipe (110) between the second valve (130) and the third valve (140) is connected to a delivery mechanism (30), and the delivery mechanism (30) is used to connect to the compressor unit (40) for oil supply.

2. The water-cooled oil-injected screw air compressor with a heat recovery device according to claim 1, characterized in that: The second flow channel input end of the heat recovery heat exchanger (10) is connected to an input pipeline (170), the second flow channel output end of the heat recovery heat exchanger (10) is connected to an output pipeline (180), and a fourth valve (190) is installed on the output pipeline (180).

3. The water-cooled oil-injected screw air compressor with a heat recovery device according to claim 1, characterized in that: The conveying mechanism (30) comprises an oil heat exchanger (310), wherein a third flow channel and a fourth flow channel are integrated in the oil heat exchanger (310); The input end of the third flow channel is connected to a first conduit (320), the first conduit (320) is connected to a delivery pipe (110) between the second valve (130) and the third valve (140), and the output end of the third flow channel is connected to a second conduit (330); The second conduit (330) is used to connect to the compressor unit (40) for oil supply.

4. The water-cooled oil-injected screw air compressor with a heat recovery device according to claim 3, characterized in that: Also included is an air heat exchanger (50), wherein the air heat exchanger (50) has a fifth flow channel and a sixth flow channel integrated therein; The air output end of the oil-gas separation tank (20) is connected to a third conduit (510), the third conduit (510) is connected to the input end of the fifth flow channel, and the output end of the fifth flow channel is used to output gas; The input end of the fourth flow channel is connected to a cold water input pipe (340), the output end of the fourth flow channel is connected to a cold water output pipe (350), the cold water output pipe (350) is connected to a three-way valve (540), the second port of the three-way valve (540) is connected to a fourth conduit (520), the fourth conduit (520) is connected to the input end of the sixth flow channel, the output end of the sixth flow channel is connected to a cold water return pipe (550), the cold water input pipe (340) is connected to a bypass pipe (530), and the bypass pipe (530) is connected to the third port of the three-way valve (540).

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