Dry-type evaporator and air conditioner

Abstract

The embodiment of the utility model provides a dry-type evaporator and an air conditioner, and the dry-type evaporator comprises a shell filled with a secondary refrigerant; the refrigerant pipe is provided with a refrigerant input end, a heat exchange pipe body and a refrigerant output end, the refrigerant input end, the heat exchange pipe body and the refrigerant output end are sequentially connected, the refrigerant input end and the refrigerant output end are arranged outside the shell, and the heat exchange pipe body is arranged in the shell and soaked in the secondary refrigerant; and the liquid viewing mirror is arranged on the heat exchange tube body and used for observing bubbles in the heat exchange tube body so as to determine the refrigerant evaporation rate of the dry type evaporator according to the area proportion of the bubbles in the cross section of the heat exchange tube body.

Description

Technical Field

[0001] This application relates to the field of evaporator technology, specifically to a dry evaporator and an air conditioner. Background Technology

[0002] Dry-type evaporators, also known as dry shell-and-tube evaporators, are commonly used evaporative heat exchange devices in refrigeration cycle systems. In related technologies, dry-type evaporators are equipped with temperature sensors, and the refrigerant flow rate is controlled based on the measurements taken by these sensors. However, these temperature sensors are prone to malfunction or failure, making it impossible to control the refrigerant flow rate. This can lead to incomplete refrigerant evaporation, potentially causing liquid slugging in the compressor, resulting in low control reliability. Utility Model Content

[0003] This application provides a dry evaporator and an air conditioner, which can reliably detect and control the refrigerant evaporation rate of the dry evaporator, effectively ensuring the safe operation of the compressor and providing high control reliability.

[0004] On one hand, this application provides a dry evaporator, comprising: a shell filled with a refrigerant; a refrigerant pipe having a refrigerant inlet, a heat exchange tube body, and a refrigerant outlet connected in sequence, wherein the refrigerant inlet and the refrigerant outlet are respectively disposed outside the shell, and the heat exchange tube body is disposed inside the shell and immersed in the refrigerant; and a sight glass disposed on the heat exchange tube body for observing bubbles inside the heat exchange tube body, so as to determine the refrigerant evaporation rate of the dry evaporator based on the area ratio of the bubbles in the cross-section of the heat exchange tube body.

[0005] In some embodiments, the dry evaporator includes a plurality of sight glasses, which are arranged at intervals along the extension direction of the heat exchange tube body.

[0006] In some embodiments, the dry evaporator includes a pressure sensor disposed at the refrigerant output terminal for measuring the evaporation pressure of the dry evaporator.

[0007] In some embodiments, the housing includes a housing body and two end caps, the two end caps being respectively disposed at opposite ends of the housing body along a first direction, the refrigerant inlet and the refrigerant outlet being formed on the same end cap, the heat exchange tube body including a plurality of straight pipe sections and at least one bent pipe section, with adjacent two straight pipe sections connected by a bent pipe section, the first direction being the length direction of the housing body.

[0008] In some embodiments, a refrigerant inlet and a refrigerant outlet are provided on the top of the housing body along a second direction. The refrigerant inlet is located close to the refrigerant inlet, and the refrigerant outlet is located away from the refrigerant outlet. The second direction is the height direction of the housing body.

[0009] In some embodiments, the refrigerant output terminal and the refrigerant input terminal are arranged alternately from top to bottom.

[0010] In some embodiments, the housing is provided with a refrigerant inlet and a refrigerant outlet, and the dry evaporator includes a water inlet temperature sensor and a water outlet temperature sensor. The water inlet temperature sensor is disposed at the refrigerant inlet, and the water outlet temperature sensor is disposed at the refrigerant outlet.

[0011] In some embodiments, the dry evaporator includes an antifreeze temperature sensor located at the bottom of the housing.

[0012] In some embodiments, the bottom of the housing is provided with a refrigerant outlet.

[0013] On the other hand, embodiments of this application provide an air conditioner including the dry evaporator provided in any of the above embodiments.

[0014] This embodiment of the application installs a sight glass on the heat exchange tube body of the refrigerant pipe to observe bubbles inside the heat exchange tube body. The refrigerant evaporation rate of the dry evaporator is determined based on the area ratio of the bubbles in the cross-section of the heat exchange tube body. Then, the opening of a throttling device, such as an electronic expansion valve, is controlled according to the refrigerant evaporation rate of the dry evaporator to adjust the refrigerant flow rate and refrigerant evaporation rate to a level that matches the actual operating conditions. This ensures that the refrigerant in the dry evaporator evaporates fully, avoids liquid slugging failure in the compressor, and effectively ensures the safe operation of the compressor with high control reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 These are projected structural diagrams of dry evaporators provided in some embodiments of this application;

[0017] Figure 2 This is an exploded structural diagram of a dry evaporator provided in some embodiments of this application.

[0018] Explanation of key component symbols:

[0019] 1-Dry evaporator, 10-Shell, 11-Shell body, 12-End cap, 13-Refrigerant inlet, 14-Refrigerant outlet, 15-Refrigerant outlet, 20-Refrigerant pipe, 21-Refrigerant inlet, 22-Heat exchange tube body, 23-Refrigerant outlet, 30-Sight glass, 40-Pressure sensor, 50-Inlet water temperature sensor, 60-Outlet water temperature sensor, 70-Antifreeze temperature sensor. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 this application. Furthermore, 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0023] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0024] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0025] like Figure 1 and Figure 2 As shown, in one aspect, this application provides a dry evaporator 1, which includes a shell 10, a refrigerant pipe 20 and a sight glass 30. The dry evaporator 1 can reliably detect and control the refrigerant evaporation rate of the dry evaporator 1, effectively ensuring the safe operation of the compressor and providing high control reliability.

[0026] The housing 10 is filled with a refrigerant. Here, the housing 10 may have a refrigerant chamber inside, into which the refrigerant is filled and can circulate. The type of refrigerant can be determined according to actual needs; for example, liquid refrigerant such as water can be used, but this embodiment does not limit this.

[0027] The refrigerant pipe 20 has a refrigerant inlet 21, a heat exchange tube body 22, and a refrigerant outlet 23 connected in sequence. The refrigerant inlet 21 and the refrigerant outlet 23 are respectively disposed outside the shell 10, while the heat exchange tube body 22 is disposed inside the shell 10 and immersed in the refrigerant. Liquid refrigerant can flow from the refrigerant inlet 21 into the heat exchange tube body 22. When flowing through the heat exchange tube body 22, it exchanges heat with the refrigerant located outside the heat exchange tube body 22, causing the liquid refrigerant to absorb heat from the refrigerant and gradually evaporate into gaseous refrigerant, and finally flow out of the heat exchange tube body 22 from the refrigerant outlet 23. During this process, the temperature of the refrigerant gradually decreases to obtain the required cooling capacity, and then flows to the target space area to reduce the room temperature of the target space area.

[0028] A sight glass 30 is mounted on the heat exchange tube body 22 to observe bubbles within the heat exchange tube body 22. Here, as the liquid refrigerant flows along the heat exchange tube body 22 and gradually evaporates into gaseous refrigerant, the ratio of liquid to gaseous refrigerant varies in different sections of the heat exchange tube body 22. The proportion of gaseous refrigerant gradually increases from the end of the heat exchange tube body 22 near the refrigerant inlet 21 to the end near the refrigerant outlet 23. Along the refrigerant flow direction, the refrigerant in the heat exchange tube body 22 changes from a pure liquid to a gas-liquid mixture, and then from a gas-liquid mixture to a pure gas. In sections of the heat exchange tube body 22 where a gas-liquid mixture exists, the gaseous refrigerant exhibits bubble-like characteristics, causing bubbles to appear in these sections, and the bubble volume gradually increases with the increase in the proportion of gaseous refrigerant. In sections of the heat exchange tube body 22 where both pure liquid and pure gas exist, no bubbles are present.

[0029] In this way, the bubbles inside the heat exchange tube body 22 can be observed using the sight glass 30. The refrigerant evaporation rate of the dry evaporator 1 can be determined based on the area ratio of the bubbles in the cross-section of the heat exchange tube body 22. Then, the opening of throttling devices such as electronic expansion valves can be controlled according to the refrigerant evaporation rate of the dry evaporator 1 to adjust the refrigerant flow rate and refrigerant evaporation rate of the dry evaporator 1 to a level that matches the actual operating conditions. This ensures that the refrigerant in the dry evaporator 1 evaporates fully, avoids liquid slugging failure of the compressor, effectively ensures the safe operation of the compressor, has high control reliability, and can accurately control and improve the actual operating energy efficiency of the dry evaporator 1.

[0030] The number of sight glasses 30 can be determined according to actual needs, and this application embodiment does not limit this. In some embodiments, the dry evaporator 1 may include multiple sight glasses 30, which are arranged sequentially and at intervals along the extension direction of the heat exchange tube body 22, so that multiple sections of the heat exchange tube body 22 can be respectively equipped with sight glasses 30. In this way, the bubbles in each section can be observed by using sight glasses 30 located in different sections, and the change of the area ratio of the bubbles in the cross-section of the heat exchange tube body 22 along the refrigerant flow direction can be determined. Then, based on the change of the area ratio of the bubbles along the refrigerant flow direction, the refrigerant evaporation rate and actual operating efficiency of the dry evaporator 1 can be determined more accurately, thereby effectively ensuring that the refrigerant in the dry evaporator 1 evaporates fully, avoiding liquid slugging failure of the compressor, and accurately controlling and improving the actual operating efficiency of the dry evaporator 1.

[0031] In some embodiments, the dry evaporator 1 may include a pressure sensor 40. The pressure sensor 40 is disposed at the refrigerant output terminal 23 and is used to measure the evaporation pressure of the dry evaporator 1. In this way, the evaporation temperature of the dry evaporator 1 can be determined based on the measured evaporation pressure, and then the suction superheat can be controlled based on the evaporation temperature of the dry evaporator 1 and the suction temperature of the compressor to avoid the risk of liquid slugging in the compressor.

[0032] In some embodiments, the housing 10 may include a housing body 11 and two end caps 12. The two end caps 12 are respectively disposed at opposite ends of the housing body 11 along a first direction, which is the length direction of the housing body 11. Here, the refrigerant inlet 21 and the refrigerant outlet 23 may be formed on the same end cap 12; the heat exchange tube body 22 includes multiple straight pipe sections and at least one bent pipe section, with adjacent straight pipe sections connected by a bent pipe section, allowing the heat exchange tube body 22 to extend along a curve to connect the refrigerant inlet 21 and the refrigerant outlet 23, increasing the length and heat exchange area of ​​the heat exchange tube body 22. In this way, the refrigerant can flow from the refrigerant inlet 21 into the heat exchange tube body 22, and efficiently exchange heat with the refrigerant along the heat exchange tube body 22 with its curved tube structure, effectively ensuring the evaporation efficiency of the refrigerant in the heat exchange tube body 22.

[0033] In some examples, a refrigerant inlet 13 and a refrigerant outlet 14 may be provided at the top of the casing 11 along a second direction, where the second direction is the height direction of the casing 11. Here, the refrigerant inlet 13 can be located close to the refrigerant inlet 21, while the refrigerant outlet 14 can be located away from the refrigerant outlet 23. In this way, the refrigerant can flow into the casing 11 from a position close to the refrigerant inlet 21 to quickly exchange heat with the refrigerant flowing into the heat exchange tube body 22 from the refrigerant inlet 13, effectively ensuring the heat exchange efficiency between the refrigerant and the refrigerant, thereby ensuring the evaporation efficiency of the refrigerant and the cooling efficiency of the refrigerant.

[0034] In some examples, the refrigerant outlet 23 and the refrigerant inlet 21 can be arranged alternately from top to bottom. In other words, the refrigerant outlet 23 is located above the refrigerant inlet 21, allowing the refrigerant to flow in from the lower side of the housing body 11 and out from the upper side of the housing body 11. In this way, the refrigerant flows from bottom to top in the heat exchange tube body 22, ensuring that the refrigerant flows evenly through the entire tube section of the heat exchange tube body 22. At the same time, it makes it easy for gaseous refrigerant to be discharged from the upper refrigerant outlet 23, and avoids the risk of liquid slugging caused by unevaporated liquid refrigerant being carried into the compressor.

[0035] In some embodiments, the housing 10 may be provided with a refrigerant inlet 13 and a refrigerant outlet 14 to realize the circulation of the refrigerant. The dry evaporator 1 may include an inlet water temperature sensor 50 and an outlet water temperature sensor 60. The inlet water temperature sensor 50 is disposed at the refrigerant inlet 13 and is used to detect the inlet water temperature of the refrigerant on the housing 10. The outlet water temperature sensor 60 is disposed at the refrigerant outlet 14 and is used to detect the outlet water temperature of the refrigerant on the housing 10. Based on the detection values ​​of the inlet water temperature sensor 50 and the outlet water temperature sensor 60, the inlet and outlet water temperature difference of the refrigerant on the housing 10 can be determined, and the loading and unloading state of the compressor can be controlled according to the inlet and outlet water temperature difference of the refrigerant.

[0036] In some embodiments, the dry evaporator 1 may include an antifreeze temperature sensor 70, which is disposed at the bottom of the housing 10. The antifreeze temperature sensor 70 is used to detect the temperature of the refrigerant located at the bottom of the housing 10, and the operating state of the compressor can be controlled according to the detected value of the antifreeze temperature sensor 70 to prevent the refrigerant from freezing into ice inside the housing 10.

[0037] In some embodiments, the bottom of the housing 10 may be provided with a refrigerant outlet 15. When the ambient temperature is low and there is a risk of refrigerant freezing inside the housing 10, the refrigerant outlet 15 can be used to discharge the unfrozen refrigerant, reducing the risk of the housing 10 cracking due to refrigerant freezing.

[0038] On the other hand, this application provides an air conditioner that includes the dry evaporator 1 provided in any of the above embodiments. The type of air conditioner can be determined according to actual needs, and can include, for example, a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, etc., which is not limited in this application. The air conditioner provided in this application has the aforementioned dry evaporator 1, which can reliably detect and control the refrigerant evaporation rate of the dry evaporator 1, effectively ensuring the safe operation of the compressor and providing high control reliability.

[0039] The dry evaporator and air conditioner provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A dry evaporator, characterized in that, include: The casing is filled with a refrigerant. The refrigerant pipe has a refrigerant inlet, a heat exchange tube body, and a refrigerant outlet connected in sequence. The refrigerant inlet and the refrigerant outlet are respectively disposed outside the shell, and the heat exchange tube body is disposed inside the shell and immersed in the refrigerant. A sight glass, mounted on the heat exchange tube body, is used to observe bubbles within the heat exchange tube body, so as to determine the refrigerant evaporation rate of the dry evaporator based on the area ratio of the bubbles in the cross-section of the heat exchange tube body.

2. The dry evaporator according to claim 1, characterized in that, The dry evaporator includes multiple sight glasses, which are arranged at intervals along the extension direction of the heat exchange tube body.

3. The dry evaporator according to claim 1, characterized in that, The dry evaporator includes a pressure sensor located at the refrigerant output end, used to measure the evaporation pressure of the dry evaporator.

4. The dry evaporator according to claim 1, characterized in that, The housing includes a housing body and two end caps, which are respectively disposed on opposite ends of the housing body along a first direction. The refrigerant inlet and the refrigerant outlet are formed on the same end cap. The heat exchange tube body includes multiple straight pipe sections and at least one bent pipe section. Adjacent straight pipe sections are connected by a bent pipe section. The first direction is the length direction of the housing body.

5. The dry evaporator according to claim 4, characterized in that, The housing body is provided with a refrigerant inlet and a refrigerant outlet at the top along the second direction. The refrigerant inlet is located close to the refrigerant inlet, and the refrigerant outlet is located away from the refrigerant outlet. The second direction is the height direction of the housing body.

6. The dry evaporator according to claim 4, characterized in that, The refrigerant output terminal and the refrigerant input terminal are arranged alternately from top to bottom.

7. The dry evaporator according to claim 1, characterized in that, The housing is provided with a refrigerant input terminal and a refrigerant output terminal. The dry evaporator includes a water inlet temperature sensor and a water outlet temperature sensor. The water inlet temperature sensor is located at the refrigerant input terminal, and the water outlet temperature sensor is located at the refrigerant output terminal.

8. The dry evaporator according to claim 1, characterized in that, The dry evaporator includes an antifreeze temperature sensor, which is located at the bottom of the housing.

9. The dry evaporator according to claim 1, characterized in that, The bottom of the casing is provided with a refrigerant outlet.

10. An air conditioner, characterized in that, Includes the dry evaporator according to any one of claims 1-9.

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