Cold air conditioning unit with double-pipe heat exchanger

Abstract

The utility model relates to a cold air conditioning unit with a double-pipe heat exchanger, which comprises an inner pipe and an outer pipe, and the double-pipe heat exchanger extending into the outer pipe is arranged outside the outer pipe. The double-pipe heat exchanger comprises a sealing cover and a heater which is arranged in the sealing cover and extends into the outer pipe, and a temperature sensor and a liquid level sensor are installed on the inner wall of the sealing cover. A filtering structure is arranged at the bottom of the outer pipe and comprises a filtering pipe, a filtering net detachably mounted in the filtering pipe and a dismounting and mounting assembly arranged in the filtering pipe and used for mounting the filtering net. According to the cold air conditioning unit with the double-pipe heat exchanger, the water temperature can be monitored through the temperature sensor, the heater can be conveniently turned off or turned on in time so as to be better used, meanwhile, energy and electricity can be conveniently saved, and therefore the advantages of being high in practicability, convenient to monitor the temperature and the like are achieved; the problem that the heating time and the heating temperature of the heater cannot be controlled and known is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shell and tube heat exchangers, in particular to a cold air conditioning unit with a shell and tube heat exchanger. Background Art

[0002] The air conditioner usually includes a compressor, an evaporator, a condenser and a four-way valve, etc., wherein the evaporator is usually installed in the indoor unit, and the condenser is usually installed in the outdoor unit. The four-way valve is used to change the flow direction of the refrigerant between the evaporator and the condenser. In winter, the ambient temperature is low. When the heating mode is used indoors, frost will appear on the surface of the condenser, which will reduce the heat exchange efficiency of the condenser and is not conducive to the reliable operation of the air conditioner. In the prior art, when defrosting, the air conditioner heating mode is usually converted to a cooling mode for defrosting. After converting to the cooling mode, the refrigerant passing through the condenser becomes a high-temperature liquid, which can melt and remove the frost on the surface. After defrosting is completed, the air conditioner operation mode can be adjusted back to heating. The defect of the above-mentioned defrosting scheme is that due to the low temperature in winter, the cooling mode is adjusted during defrosting, and the indoor unit blows out cold air, which will lower the indoor temperature and seriously affect the user experience of the air conditioner.

[0003] After searching, Chinese patent CN212620273U discloses a shell-and-tube heat exchanger and an air conditioner having the shell-and-tube heat exchanger, wherein the shell-and-tube heat exchanger includes an inner tube, an outer tube and a sealing end cover connected to the outer tube, an inner cavity is formed between the inner tube, the outer tube and the sealing end cover, and the shell-and-tube heat exchanger also includes a heater at least partially located in the inner cavity. The utility model can heat the water in the shell-and-tube heat exchanger by arranging a heater in the shell-and-tube heat exchanger, and can prevent the water temperature in the shell-and-tube heat exchanger from decreasing when the air conditioner defrosts, so that the air conditioner indoor unit always blows out hot air and does not blow cold air.

[0004] However, the utility model shell and tube heat exchanger and the air conditioner with the shell and tube heat exchanger lack temperature monitoring equipment, and cannot control and understand the heating time and heating temperature of the heater. Not only is it easy to consume extra electricity, it may even affect the use of the inner tube and cannot meet the use requirements. Therefore, a cold air conditioning unit with a shell and tube heat exchanger is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an air conditioning unit with a shell and tube heat exchanger, which has the advantages of strong practicality and convenient temperature monitoring, and solves the problem of being unable to control and understand the heating time and heating temperature of the heater.

[0006] To achieve the above object, the utility model provides the following technical solution: a cold air conditioning unit with a shell and tube heat exchanger, comprising an inner tube and an outer tube, wherein the outer tube is provided with a shell and tube heat exchanger extending therein;

[0007] The shell-and-tube heat exchanger comprises a sealing cover, a heater arranged inside the sealing cover and extending to the inside of the outer tube, and a temperature sensor and a liquid level sensor are installed on the inner wall of the sealing cover;

[0008] A filtering structure is arranged at the bottom of the outer tube, and the filtering structure comprises a filtering tube, a filtering net detachably installed inside the filtering tube, and a disassembly and assembly component arranged inside the filtering tube for installing the filtering net.

[0009] Furthermore, a sealing end fixed to a sealing cover is installed at the right end of the heater, and an inner cavity is formed between the outer tube and the sealing cover.

[0010] Furthermore, the top of the outer tube is fixedly connected to a water inlet pipe, and the bottom of the outer tube is fixedly connected to a water outlet pipe connected to the filter tube. Both ends of the inner tube extend to the outside of the outer tube, and fixed mounting bolts are provided at the contact position between the inner tube and the outer tube.

[0011] Furthermore, the bottom end of the water outlet pipe and the top end of the filter pipe are both welded with connecting flanges, and the insides of the two connecting flanges are both provided with mounting holes for installation.

[0012] Furthermore, the disassembly and assembly assembly includes a slide seat fixedly installed on the left and right sides of the filter tube and a slider fixedly installed on the left and right sides of the filter screen and slidably connected to the two slide seats.

[0013] Furthermore, the disassembly and assembly assembly also includes a sleeve installed inside the slider by bolts, a return spring fixedly installed on the inner bottom wall of the sleeve, and a block fixedly connected to the top of the return spring and extending to the outside of the slide.

[0014] Furthermore, the shape of the slide seat is a concave shape, and the concave surfaces of the two slide seats are arranged opposite to each other, and a clamping hole adapted to the clamping block is opened inside the slide seat.

[0015] Furthermore, an inspection plate is detachably mounted on the outside of the filter tube, and the inspection plate is fixed by bolts.

[0016] Compared with the prior art, the utility model provides a cold air conditioning unit with a shell and tube heat exchanger, which has the following beneficial effects:

[0017] 1. The cold air conditioning unit with a shell and tube heat exchanger can monitor the water temperature through a temperature sensor, so as to close or open the heater in time for better use and save energy and electricity, thereby achieving the advantages of strong practicality and convenient temperature monitoring, and solving the problem of being unable to control and understand the heating time and heating temperature of the heater.

[0018] 2. The cold air conditioning unit with a shell and tube heat exchanger can filter the liquid in the inner cavity through the filter to prevent the water from containing a large amount of impurities, which is convenient for subsequent use. The filter can be disassembled for maintenance by opening the inspection panel and pressing the card block to extend the inside of the box sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0020] Figure 2 This is a structural stereogram of the filter tube of the utility model;

[0021] Figure 3 This is a structural cross-sectional view of the filter tube of the utility model;

[0022] Figure 4 For this utility model Figure 3 A is a schematic diagram of the enlarged structure shown.

[0023] In the figure: 1. inner tube; 2. outer tube; 3. water inlet pipe; 4. water outlet pipe; 5. sealing cover; 6. heater; 7. sealing end; 8. temperature sensor; 9. liquid level sensor; 10. filter tube; 11. filter screen; 12. connecting flange; 13. slide seat; 14. slider; 15. sleeve; 16. reset spring; 17. block; 18. inspection plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] See also Figure 1 A cold air conditioning unit with a shell and tube heat exchanger includes an inner tube 1 and an outer tube 2, and the outer tube 2 is provided with a shell and tube heat exchanger extending therein; the shell and tube heat exchanger includes a sealing cover 5, a heater 6 arranged inside the sealing cover 5 and extending to the inner part of the outer tube 2, and a temperature sensor 8 and a liquid level sensor 9 are installed on the inner wall of the sealing cover 5; the water temperature can be monitored by the temperature sensor 8, so that the heater 6 can be turned off or on in time for better use. There are two liquid level sensors 9, which are convenient for better drainage. A sealing end 7 fixed to the sealing cover 5 is installed at the right end of the heater 6, and an inner cavity is formed between the outer tube 2 and the sealing cover 5.

[0027] It should be noted that the heater 6 adopts an electric heating rod in the prior art. In other embodiments, it can also adopt, for example, an electric heating wire wound around the outside of the inner tube 1. The number of heaters 4 outside the inner tube 1 is not limited, and the sealing end 7 for installing the heater 6 can be increased accordingly. By arranging the heater 6 in the shell-and-tube heat exchanger, the water in the shell-and-tube heat exchanger can be heated by the heater 6. When the air conditioner is defrosted, the water temperature in the shell-and-tube heat exchanger can be prevented from decreasing, so that the air conditioner indoor unit always blows out hot air and does not blow cold air, making the indoor environment more comfortable.

[0028] Embodiment 2:

[0029] See also Figure 2-4 On the basis of the first embodiment, in this embodiment, a filtering structure is provided at the bottom of the outer tube 2, and the filtering structure includes a filter tube 10, a filter screen 11 detachably installed inside the filter tube 10, and a disassembly assembly provided inside the filter tube 10 for installing the filter screen 11. The disassembly assembly includes a slide 13 fixedly installed on the left and right sides of the filter tube 10, and a slider 14 fixedly installed on the left and right sides of the filter screen 11 and slidably connected to the two slides 13. The disassembly assembly also includes a sleeve 15 installed inside the slider 14 by bolts, a reset spring 16 fixedly installed on the inner bottom wall of the sleeve 15, and a block 17 fixedly connected to the top of the reset spring 16 and extending to the outside of the slide 13.

[0030] The shape of the slide seat 13 is a concave shape, and the concave surfaces of the two slide seats 13 are arranged opposite to each other, and a clamping hole adapted to the clamping block 17 is opened inside the slide seat 13. The top of the outer tube 2 is fixedly connected with the water inlet pipe 3, and the bottom of the outer tube 2 is fixedly connected with the water outlet pipe 4 connected with the filter tube 10, and the two ends of the inner tube 1 extend to the outside of the outer tube 2, and the position where the inner tube 1 contacts the outer tube 2 is provided with a fixed mounting bolt.

[0031] In order to connect the water storage pipe 4 with the filter pipe 10. The bottom end of the water outlet pipe 4 and the top end of the filter pipe 10 are welded with a connecting flange 12, and the inside of the two connecting flanges 12 are provided with mounting holes for installation. The outside of the filter pipe 10 is detachably mounted with an inspection plate 18, and the installation method of the inspection plate 18 is bolt fixing. Through the filter screen 11, the liquid in the inner cavity can be filtered to avoid a large amount of impurities in the water, which is convenient for subsequent use. By opening the inspection plate 18 and pressing the block 17 to extend the inside of the box sleeve 15, the filter screen 11 can be disassembled for inspection.

[0032] The working principle of the above embodiment is:

[0033] The air conditioning unit includes a compressor, an evaporator, a condenser and a four-way valve, etc. The evaporator is installed in the indoor unit of the air conditioner. The evaporator adopts the above-mentioned shell-and-tube heat exchanger. When defrosting, the air conditioner starts the cooling mode, and the low-temperature refrigerant flows through the inner tube 1. At this time, the heater 6 starts heating to heat the water in the inner cavity so that the water temperature can be maintained or increased. The wind blown out by the indoor unit will not become cold, and it can even continue to blow out hot air, which provides a better user experience. In addition, the water temperature can be monitored through the temperature sensor 8, which is convenient for timely closing or opening the heater 6 for better use.

[0034] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold air conditioning unit with a shell-and-tube heat exchanger, comprising an inner tube (1) and an outer tube (2), Features: The outer portion of the outer tube (2) is provided with a shell-and-tube heat exchanger extending into the inner portion; The shell-and-tube heat exchanger comprises a sealing cover (5), a heater (6) arranged inside the sealing cover (5) and extending into the interior of the outer tube (2), and a temperature sensor (8) and a liquid level sensor (9) are installed on the inner wall of the sealing cover (5); A filtering structure is provided at the bottom of the outer tube (2), the filtering structure comprising a filtering tube (10), a filtering screen (11) detachably mounted inside the filtering tube (10), and a disassembly assembly arranged inside the filtering tube (10) for mounting the filtering screen (11).

2. A cold air conditioning unit with a shell and tube heat exchanger according to claim 1, Features: The right end of the heater (6) is provided with a sealing end (7) fixed to the sealing cover (5), and an inner cavity is formed between the outer tube (2) and the sealing cover (5).

3. A cold air conditioning unit with a shell and tube heat exchanger according to claim 1, Features: The top of the outer tube (2) is fixedly connected to a water inlet pipe (3), and the bottom of the outer tube (2) is fixedly connected to a water outlet pipe (4) connected to a filter tube (10), both ends of the inner tube (1) extend to the outside of the outer tube (2), and fixed mounting bolts are provided at the position where the inner tube (1) contacts the outer tube (2).

4. A cold air conditioning unit with a shell and tube heat exchanger according to claim 3, Features: The bottom end of the water outlet pipe (4) and the top end of the filter pipe (10) are both welded with connecting flanges (12), and the insides of the two connecting flanges (12) are provided with mounting holes for installation.

5. A cold air conditioning unit with a shell and tube heat exchanger according to claim 1, Features: The disassembly and assembly assembly comprises a slide seat (13) fixedly mounted on the left and right sides of the filter tube (10) and a slide block (14) fixedly mounted on the left and right sides of the filter screen (11) and slidably connected to the two slide seats (13).

6. A cold air conditioning unit with a shell and tube heat exchanger according to claim 5, Features: The disassembly and assembly assembly further comprises a sleeve (15) installed inside the slide block (14) by means of bolts, a return spring (16) fixedly installed on the inner bottom wall of the sleeve (15), and a clamping block (17) fixedly connected to the top end of the return spring (16) and extending to the outside of the slide seat (13).

7. A cold air conditioning unit with a shell and tube heat exchanger according to claim 5, Features: The shape of the slide seat (13) is a concave shape, and the concave surfaces of the two slide seats (13) are arranged opposite to each other. A clamping hole matched with the clamping block (17) is opened inside the slide seat (13).

8. A cold air conditioning unit with a shell and tube heat exchanger according to claim 1, Features: An inspection plate (18) is detachably mounted on the outside of the filter tube (10), and the inspection plate (18) is mounted by bolt fixing.

Images