Exhaust structure for v-compressor of refrigeration system

Abstract

The application discloses an exhaust structure of a V-type compressor for a refrigeration system, which comprises two cylinder heads, two sets of heat insulation components, a flow guide pipe, a thermocouple and an energy consumption element; the internal cavity of each cylinder head is divided into an air suction cavity and an exhaust cavity by a cylinder wall partition plate; the two sets of heat insulation components are correspondingly arranged on the two cylinder wall partition plates; the flow guide pipe is arranged between the two cylinder heads and communicates with the exhaust cavities of the two cylinder heads; the thermocouple has a positive electrode and a negative electrode, the positive electrode is arranged on the flow guide pipe, and the negative electrode is arranged in air; and the energy consumption element is electrically connected in a loop between the positive electrode and the negative electrode of the thermocouple. The heat insulation components can isolate the heat conduction of the air suction cavity and the exhaust cavity through the cylinder wall partition plate, reduce the intake overheating of the compressor, reduce the exhaust temperature, the waste heat on the exhaust side of the refrigeration compressor is recovered for thermoelectric power generation through the arranged thermocouple, the exhaust temperature is reduced, the energy consumption element is powered, and the performance of the compressor is further optimized.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, specifically to the exhaust structure of a V-type compressor used in refrigeration systems. Background Technology

[0002] With the vigorous implementation of the "dual carbon" policy, the market share of compressors using clean gases such as carbon dioxide as working fluids is constantly increasing. These compressors are also known as process gas compressors.

[0003] Compared to vertical and horizontal compressors, angled V-type compressors have good force balance and are well used in the field of process gas compression with high exhaust pressure.

[0004] When using an angled V-type compressor in a refrigeration system, the discharge pressure and temperature are higher than those of a traditional compressor. At the same condensing temperature, the condenser has a greater heat exchange capacity. If the discharge temperature exceeds the design operating conditions, it will directly affect the stability of the refrigeration system. In addition, most current V-type compressors have integrated intake and exhaust cylinder heads, meaning the cylinder head is divided into intake and exhaust chambers. The high-temperature gas in the exhaust chamber heats the low-temperature gas in the intake chamber through the cylinder wall baffles, which in turn raises the gas temperature in the intake chamber, i.e., raises the compressor's intake temperature. This increase in intake temperature not only reduces the compressor's volumetric efficiency and affects its performance, but also causes the discharge temperature to be too high, thus affecting the stability of the refrigeration system. Summary of the Invention

[0005] The purpose of this invention is to provide an exhaust structure for a V-type compressor in a refrigeration system to reduce intake overheating of the compressor, lower the exhaust temperature of the compressor in the refrigeration system, recover heat, and improve energy utilization efficiency.

[0006] The technical solution of this invention is: an exhaust structure for a V-type compressor in a refrigeration system, comprising two cylinder heads, two sets of heat insulation components, a guide pipe, a thermocouple, and an energy-consuming element; the two cylinder heads are symmetrically arranged for connection with the cylinders of the V-type compressor, and the internal cavity of each cylinder head is divided by a cylinder wall partition to form an intake chamber and an exhaust chamber; the two sets of heat insulation components are respectively disposed on the two cylinder wall partitions; the guide pipe is disposed between the two cylinder heads, and both ends of the guide pipe are connected to the exhaust chamber of each cylinder head; the thermocouple has a positive electrode and a negative electrode, the positive electrode is disposed on the guide pipe as the hot end of thermoelectric power generation, and the negative electrode is disposed in the air as the cold end of thermoelectric power generation; the energy-consuming element is electrically connected in the circuit between the positive and negative electrodes of the thermocouple, and the energy-consuming element is used to convert the electrical energy generated by the thermocouple into heat energy for consumption and utilization.

[0007] Preferably, the heat insulation component includes two first heat insulation layers, which are respectively disposed on the two side walls of the cylinder wall partition.

[0008] Preferably, the heat insulation assembly further includes a second heat insulation layer, and the top of the cylinder wall partition is provided with an installation groove, which is located between the two first heat insulation layers, and the second heat insulation layer is disposed in the installation groove.

[0009] Preferably, the first insulation layer is phenolic foam, and the second insulation layer is silicate.

[0010] Preferably, the energy-consuming element is a monitoring sensor, which is used to monitor the operating temperature and humidity of the V-type compressor. The monitoring sensor is electrically connected to a thermocouple and an external controller, respectively.

[0011] Preferably, the exhaust chamber is provided with an exhaust port, and each cylinder head is connected to the guide pipe through the exhaust port.

[0012] Preferably, the top of the guide pipe is arched, and the two end faces of the guide pipe are fixed to the outer wall of the two cylinder heads. The upper edge of the guide pipe coincides with the upper edge of the two cylinder heads, and the lower edge of the guide pipe coincides with the lower edge of the two cylinder heads. After the high-pressure gas flows out from the exhaust chambers on both sides, it converges in the middle and exhausts upward along the arched guide pipe.

[0013] Preferably, an exhaust valve base is provided at the top center of the guide pipe, and the exhaust valve base is provided with a mounting hole for fixing the exhaust valve.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention can reduce the heat exchange between the intake and exhaust chambers inside the cylinder head. By setting the heat insulation component on the cylinder wall partition, the heat conduction between the intake and exhaust chambers through the cylinder wall partition can be isolated to the greatest extent. This is the biggest source of heat exchange between the intake and exhaust chambers. Solving this problem can reduce the intake overheating problem of the compressor, thereby reducing the exhaust temperature, reducing the power consumption of the compressor, and optimizing the performance of the compressor.

[0016] 2. This invention uses a thermocouple with the positive terminal near the exhaust position of the cylinder head as the hot junction and the negative terminal in the air as the cold junction. This allows for the recovery of heat by generating electricity from the temperature difference, reducing the exhaust temperature of the compressor and supplying power to energy-consuming components. This effectively improves energy utilization efficiency and avoids the problem of excessively high exhaust temperatures increasing the load on the condenser and affecting the stability of the refrigeration system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the cylinder head in this invention;

[0019] Figure 3 This is a top view of the structure in this invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 5 This is a schematic diagram of the thermocouple wiring in this invention. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1 to 5 The specific embodiments of the present invention will be described in detail below. In the description of the invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0024] Example 1

[0025] like Figures 1 to 5 As shown, this embodiment of the invention provides an exhaust structure for a V-type compressor used in a refrigeration system, including two cylinder heads 1, two sets of heat insulation components, a guide pipe 4, a thermocouple 6, and an energy-consuming element 7. The two cylinder heads 1 are symmetrically arranged and are used to connect to the cylinders of the V-type compressor. The internal cavity of each cylinder head 1 is divided by a cylinder wall partition 2 to form an intake chamber 11 and an exhaust chamber 12. The two sets of heat insulation components are respectively arranged on the two cylinder wall partitions 2. The guide pipe 4 is arranged between the two cylinder heads 1, and both ends of the guide pipe 4 are connected to the exhaust chamber 12 of each cylinder head 1. The thermocouple 6 has a positive electrode 61 and a negative electrode 62. The positive electrode 61 is arranged on the guide pipe 4 and serves as the hot end of thermoelectric power generation. The negative electrode 62 is arranged in the air and serves as the cold end of thermoelectric power generation. The energy-consuming element 7 is electrically connected in the circuit between the positive electrode 61 and the negative electrode 62 of the thermocouple 6, and the energy-consuming element 7 is used to consume and utilize the electrical energy generated by the thermocouple 6.

[0026] In this embodiment, gas flows into the V-type compressor from the two intake chambers 11 and then into the two exhaust chambers 12 after compression. The high-temperature, high-pressure gas in the exhaust chamber 12 and the low-temperature, low-pressure gas in the intake chamber 11 exchange heat through the cylinder wall partition 2. The heat exchange between the intake and exhaust chambers is reduced by the heat insulation components provided on the cylinder wall partition 2, thereby reducing the overheating of the compressor intake. The high-pressure gas flows out from the two cylinder heads 1 into the guide pipe 4. The guide pipe 4 is provided with an exhaust structure, which allows the gas to be exhausted in the middle of the guide pipe 4. Since the positive electrode 61 of the thermocouple 6 is located on the two end faces adjacent to the cylinder head 1 of the guide pipe 4, it serves as the hot end of the thermoelectric generator, and the negative electrode 62 is located in the air, it serves as the cold end of the thermoelectric generator. Therefore, thermoelectric generators can be generated. Moreover, the electrical energy generated by the thermoelectric generator supplies power to the energy-consuming element 7. This improves the energy utilization efficiency, reduces the exhaust temperature of the refrigeration compressor, reduces the load on the condenser, and improves the stability of the refrigeration system.

[0027] In one preferred embodiment of the energy-consuming element 7, the energy-consuming element 7 is a monitoring sensor, specifically a temperature and humidity sensor. The positive electrode 61 and negative electrode 62 of the thermocouple are respectively led out with wires and electrically connected to the temperature and humidity sensor, forming a closed loop to monitor the operating temperature and humidity of the V-type compressor. Simultaneously, the temperature and humidity sensor is equipped with a corresponding transformer rectifier and an external controller, which are electrically connected. The electrical energy generated by the positive electrode 61 of the thermocouple is converted by the transformer rectifier and then supplied to the external controller of the humidity sensor. The external controller can display the temperature and humidity monitored by the temperature and humidity sensor. The entire monitoring process utilizes the electrical energy generated by the thermocouple temperature difference power generation. The monitoring sensor 7, together with the thermocouple 6, constitutes a complete energy recovery loop. The thermocouple 6 recovers the waste heat from the exhaust side of the refrigeration compressor to generate electricity through temperature difference power generation. The electrical energy generated by the temperature difference power generation supplies power to the temperature sensor and humidity sensor to monitor the operating temperature and humidity of the V-type compressor, thereby effectively improving energy utilization efficiency.

[0028] In another optional implementation of the energy-consuming element 7, the energy-consuming element 7 is a light bulb connected in series in the thermocouple circuit. The light bulb and the thermocouple form a complete energy recovery circuit. The waste heat from the exhaust side of the refrigeration compressor is recovered by the thermocouple 6 to generate electricity from the temperature difference, and the electricity generated by the temperature difference is used to power the light bulb to provide lighting, thereby improving the energy utilization efficiency.

[0029] It should be noted that the above two examples are only used to illustrate the specific structure of the energy-consuming element 7. However, in actual applications, the energy-consuming element 7 can also be selected from other types of components that do not contain inductors and capacitors, such as speed-regulating energy-saving frequency converters, MOSFETs, coils, and resistors, to effectively utilize the electrical energy generated by thermocouple temperature difference power generation.

[0030] Furthermore, as an alternative implementation of the thermal insulation component, such as Figure 2 As shown, the heat insulation component includes two first heat insulation layers 31, which are respectively disposed on the two side walls of the cylinder wall partition 2. The first heat insulation layer 31 is made of phenolic foam plastic and is tightly attached to the wall surface of the cylinder wall partition 2. The thickness of the first heat insulation layer 31 is 2mm. The two first heat insulation layers 31 can insulate the cylinder wall partition 2 located in the intake chamber 11 and the exhaust chamber 12, reduce intake overheating, and thus reduce compressor intake overheating.

[0031] Furthermore, the heat insulation component also includes a second heat insulation layer 32. The top of the cylinder wall partition 2 is provided with an installation groove, which is located between the two first heat insulation layers 31. The second heat insulation layer 32 is disposed in the installation groove. The second heat insulation layer 32 is made of silicate. By machining the installation groove on the cylinder wall partition 2, a part of the cylinder wall partition 2 is retained as the bottom surface of the second heat insulation layer 32. The silicate is cast in the cavity to form the second heat insulation layer 32, so that the second heat insulation layer 32 is completely attached to the cylinder wall partition 2. The embedded heat insulation layer can further isolate the heat conduction of the intake and exhaust chambers and reduce intake overheating.

[0032] Furthermore, the exhaust chamber 12 is provided with an exhaust port 13, and each cylinder head 1 is connected to the guide pipe 4 through the exhaust port 13. The exhaust port 13 is rectangular, which is convenient for processing.

[0033] Among them, the positive electrode 61 of thermocouple 6 is a nickel-chromium alloy layer with a thickness of 5mm, which is welded to the guide tube 4 and serves as the two end faces adjacent to the cylinder head 1. The negative electrode 62 is a nickel-silicon alloy. It consumes the heat of high-pressure gas through thermoelectric power generation, reduces the exhaust temperature of the refrigeration compressor, reduces the load on the condenser, improves the stability of the refrigeration system, and generates high-quality electrical energy.

[0034] The guide pipe 4 is made of gray cast iron, has a hollow interior, and is 5mm thick. The top of the guide pipe 4 is arched, and the two end faces of the guide pipe 4 are fixed to the outer wall of the two cylinder heads 1. The upper edge of the guide pipe 4 coincides with the upper edge of the two cylinder heads 1, and the lower edge of the guide pipe 4 coincides with the lower edge of the two cylinder heads 1. This arrangement allows high-pressure gas to flow out from the exhaust ports 13 on the two exhaust chambers 12 and then converge in the middle and exhaust upwards along the arched guide pipe 4.

[0035] Furthermore, such as Figure 1 and Figure 3 As shown, an exhaust valve base 5 is provided on the upper end face of the guide pipe 4. The exhaust valve base 5 is made of gray cast iron and has a mounting hole 51. The high-pressure gas that gathers in the middle of the guide pipe 4 is finally discharged through the exhaust valve.

[0036] Furthermore, such as Figure 2 and Figure 4 As shown, the cylinder head 1 is provided with multiple bolt holes 14. The bolt holes 14 serve as mounting holes for the cylinder head 1 on the compressor, and can also be used as positioning holes for the outlines of the intake chamber 13 and the exhaust chamber 11 during the machining of the cylinder head 1.

[0037] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An exhaust structure for a V-type compressor used in a refrigeration system, comprising two cylinder heads (1) symmetrically arranged for connection to the cylinders of the V-type compressor, wherein the internal cavity of each cylinder head (1) is divided by a cylinder wall partition (2) to form an intake chamber (11) and an exhaust chamber (12), characterized in that, Also includes: Two sets of heat insulation components are respectively installed on the two cylinder wall partitions (2); A guide pipe (4) is provided between the two cylinder heads (1), and the two ends of the guide pipe (4) are respectively connected to the exhaust chamber (12) of each cylinder head (1); Thermocouple (6) has a positive electrode (61) and a negative electrode (62). The positive electrode (61) is disposed on the guide tube (4) as the hot end of thermoelectric power generation, and the negative electrode (62) is disposed in the air as the cold end of thermoelectric power generation. The energy-consuming element (7) is electrically connected in the circuit between the positive terminal (61) and the negative terminal (62) of the thermocouple (6). The energy-consuming element (7) is used to consume and utilize the electrical energy generated by the thermocouple (6).

2. The exhaust structure of the V-type compressor for a refrigeration system according to claim 1, characterized in that, The heat insulation component includes two first heat insulation layers (31), which are respectively disposed on the two side walls of the cylinder wall partition (2).

3. The exhaust structure of the V-type compressor for a refrigeration system according to claim 2, characterized in that, The heat insulation assembly also includes a second heat insulation layer (32). The top of the cylinder wall partition (2) is provided with an installation groove, which is located between the two first heat insulation layers (31). The second heat insulation layer (32) is disposed in the installation groove.

4. The exhaust structure of the V-type compressor for a refrigeration system according to claim 3, characterized in that, The first insulation layer (31) is phenolic foam plastic, and the second insulation layer (32) is silicate.

5. The exhaust structure of the V-type compressor for the refrigeration system according to claim 1, wherein the energy-consuming element (7) is a monitoring sensor, the monitoring sensor is used to monitor the operating temperature and humidity of the V-type compressor, and the monitoring sensor is electrically connected to the thermocouple (6) and the external controller respectively.

6. The exhaust structure of the V-type compressor for a refrigeration system according to claim 1, characterized in that, The exhaust chamber (12) is provided with an exhaust port (13), and each cylinder head (1) is connected to the guide pipe (4) through the exhaust port (13).

7. The exhaust structure of the V-type compressor for a refrigeration system according to claim 1, characterized in that, The top of the guide pipe (4) is arched, and the two end faces of the guide pipe (4) are fixed to the outer wall of the two cylinder heads (1). The upper and lower edges of the guide pipe (4) coincide with the upper and lower edges of the two cylinder heads (1).

8. The exhaust structure of the V-type compressor for a refrigeration system according to claim 7, characterized in that, The top middle of the guide pipe (4) is provided with an exhaust valve base (5), and the exhaust valve base (5) is provided with a mounting hole (51) for fixing the exhaust valve.

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