CN104896800A - Double reverse heat exchanger - Google Patents

Abstract

A double reverse heat exchanger provided by the present invention includes a shell and heat exchange tubes arranged inside the shell, a refrigerant inlet, a refrigerant outlet, a first water inlet and a first water outlet are arranged on the outside of the outer shell, and it also includes Four layers of vertical partitions parallel to the cross-section of the housing and having the same shape as the cross-section of the housing, the second water inlet and the second water outlet, the four layers of vertical partitions divide the housing from left to right It is sequentially divided into a left water mixing chamber, a left refrigerant chamber, a middle chamber, a right refrigerant chamber and a right water chamber. The heat exchange tube includes an inner tube and an outer tube wrapped outside the inner tube. The inner tube communicates with the The left water mixing chamber and the right water chamber, the outer tube communicates with the left refrigerant chamber and the right refrigerant chamber, and the second water inlet and the second water outlet are arranged on the housing. The double reverse heat exchanger provided by the present invention increases the area of water in contact with the refrigerant through the use of sleeve-type heat exchange tubes and the addition of vertical partitions, and exchanges heat with the refrigerant through double water flows to increase the heat recovery rate and improve To improve the working efficiency of the heat exchanger, the liquefied refrigerant in the left refrigerant chamber is removed through the taper joint, which avoids the accumulation of refrigerant inside the heat exchanger and ensures the normal operation of the system.

Description

double reverse heat exchanger

technical field

The invention belongs to the field of air conditioning equipment, in particular to a double reverse heat exchanger.

Background technique

For the shell-and-tube heat recovery device, if the water side and the refrigerant side are both single-flow, the refrigerant gas and water flow in reverse, and heat exchange can be fully performed, and the outlet water temperature can be greater than the outlet temperature of the refrigerant; however, due to the layout space of the unit or the Due to the limitation of water pipe connection on the user's site, in many cases, the inlet and outlet pipes of the heat recovery device must be arranged on the same side. However, limited by the structure and heat transfer temperature difference, the outlet temperature of the water cannot be higher than the outlet temperature of the refrigerant, and the sensible heat of the refrigerant gas cannot be fully recovered, and the heat recovery rate is low.

Contents of the invention

Therefore, the present invention provides a double reverse heat exchanger capable of increasing heat recovery.

A double reverse heat exchanger, comprising a shell and heat exchange tubes arranged inside the shell, the outside of the shell is provided with a refrigerant inlet, a refrigerant outlet, a first water inlet and a first water outlet, and also includes four layers of parallel The cross-section of the shell, and the vertical partition with the same shape as the cross-section of the shell, the second water inlet and the second water outlet, the four-layer vertical partition divides the shell from left to right into left and right Water mixing chamber, left refrigerant chamber, middle chamber, right refrigerant chamber and right water chamber, the heat exchange tube includes an inner tube and an outer tube wrapped outside the inner tube, the inner tube communicates with the left water mixing chamber and the right water chamber, the outer pipe communicates with the left refrigerant chamber and the right refrigerant chamber, and the second water inlet and the second water outlet are arranged on the shell.

A double reverse heat exchanger, comprising a shell and heat exchange tubes arranged inside the shell, a refrigerant inlet, a refrigerant outlet, a first water inlet and a first water outlet are arranged on the outside of the outer shell, and a horizontal partition, Four layers of vertical partitions parallel to the cross-section of the housing and having the same shape as the cross-section of the housing, the second water inlet and the second water outlet, the four layers of vertical partitions divide the housing from left to right It is sequentially divided into a left water mixing chamber, a left refrigerant chamber, a middle chamber, a right refrigerant chamber and a right water chamber. The horizontal partition is divided into three sections: the left section is arranged in the middle chamber, and the middle section is sealed in the right refrigerant chamber. The right section is sealingly arranged in the right water chamber and inside the shell, the heat exchange tube includes an inner tube and an outer tube wrapped outside the inner tube, and the inner tube communicates with the left water mixing chamber and the The right water chamber, the outer pipe communicates with the left refrigerant chamber and the right refrigerant chamber, and the second water inlet and the second water outlet are arranged on the housing.

The horizontal partition extends into the intermediate chamber, and the length of the horizontal partition in the intermediate chamber is shorter than the length of the intermediate chamber.

The horizontal partition is arranged on the center line of the shell.

The second water inlet and the second water outlet are symmetrically arranged on the housing with respect to the horizontal partition.

All of the vertical partitions have the same shape as the housing cross-section.

The second water inlet and the second water outlet are arranged on the intermediate cavity.

The second water inlet is arranged on the lower side of the casing, and the second water outlet is arranged on the upper side of the casing.

It also includes a taper joint, and the taper joint is arranged at the lowest point on the lower side of the left refrigerant chamber.

The double reverse heat exchanger provided by the present invention increases the area of water in contact with the refrigerant through the use of sleeve-type heat exchange tubes and the addition of vertical partitions, and exchanges heat with the refrigerant through double water flows to increase the heat recovery rate and improve To improve the working efficiency of the heat exchanger, the liquefied refrigerant in the left refrigerant chamber is removed through the taper joint, which avoids the accumulation of refrigerant inside the heat exchanger and ensures the normal operation of the system.

Description of drawings

Fig. 1 is the structural representation of the embodiment 1 of double reverse heat exchanger provided by the present invention;

Fig. 2 is a schematic structural view of Embodiment 2 of the double reverse heat exchanger provided by the present invention.

Detailed ways

The present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

Example 1

The double reverse heat exchanger shown in Figure 1 includes a shell 1 and heat exchange tubes 2 arranged inside the shell 1, and the outside of the shell 1 is provided with a refrigerant inlet 13, a refrigerant outlet 14, a first water inlet 11 and The first water outlet 12 also includes four layers of vertical partitions 3 parallel to the cross-section of the housing 1 and having the same shape as the cross-section of the housing 1, a second water inlet 15 and a second water outlet 16. The vertical partition 3 divides the shell 1 from left to right into a left water mixing chamber 101, a left refrigerant chamber 102, a middle chamber 103, a right refrigerant chamber 104, and a right water chamber 105. The heat exchange tube 2 includes The inner pipe 21 and the outer pipe 22 wrapped on the outside of the inner pipe 21, the inner pipe 21 communicates with the left water mixing chamber 101 and the right water chamber 105, and the outer pipe 22 communicates with the left refrigerant chamber 102 And the right refrigerant cavity 104 , the second water inlet 15 and the second water outlet 16 are arranged on the shell 1 .

The shape of all the vertical partitions 3 is the same as the cross-sectional shape of the shell 1, that is, the left water mixing chamber 101, the left refrigerant chamber 102, the middle chamber 103, the right refrigerant chamber 104 and the The right water chamber 105 is completely sealed and separated.

The second water inlet 15 and the second water outlet 16 are arranged on the middle cavity.

The second water inlet 15 is arranged on the lower side of the casing 1, and the second water outlet 16 is arranged on the upper side of the casing 1, so as to increase the residence time of water and increase the heat recovery efficiency.

It also includes a taper joint 4, which is arranged at the lowest point on the lower side of the right refrigerant chamber 104 to remove the liquefied refrigerant from the heat exchanger, avoiding the accumulation of refrigerant inside the heat exchanger, and ensuring The system works normally, increasing the heat exchange efficiency of the system.

As shown in Figure 1, there are two water exchange circuits:

First, enter the left water chamber 101 through the first water inlet 11, flow into the right water mixing chamber 105 through the inner pipe 21, and exchange heat with the refrigerant in the middle chamber;

The second line enters the lower side of the middle chamber through the second water inlet 15 , gradually fills the middle chamber, and finally flows out of the middle chamber through the second water outlet 16 .

The refrigerant passage is: flow to the right refrigerant chamber 104 through the refrigerant inlet 13, flow into the left refrigerant chamber 102 through the passage between the outer pipe 22 and the inner pipe 21, and flow out from the refrigerant outlet 14 the heat exchanger.

Example 2

The double reverse heat exchanger shown in Figure 2 includes a shell 1 and a heat exchange tube 2 arranged inside the shell 1, and the outside of the shell 1 is provided with a refrigerant inlet 11, a refrigerant outlet 12, a first water inlet 13 and The first water outlet 14 also includes a horizontal baffle 4, four layers of vertical baffles 3 parallel to the cross-section of the housing 1 and having the same shape as the cross-section of the housing 1, and a second water inlet 15 and a second water outlet 16. The four-layer vertical partition 3 divides the shell 1 from left to right into a left water mixing chamber 101, a left refrigerant chamber 102, a middle chamber 103, a right refrigerant chamber 104, and a right water chamber 105. The horizontal partitions are divided into three sections, the left section is set in the middle cavity 103, the middle section is sealed in the right refrigerant cavity 104, and the right section is sealed in the right water cavity 105 and inside the shell 1. The heat exchange tube 2 includes an inner tube 21 and an outer tube 22 wrapped on the outside of the inner tube 21, the inner tube 21 communicates with the left water mixing chamber 101 and the right water chamber 105, and the outer tube 22 communicates with all The left refrigerant chamber 102 and the right refrigerant chamber 104 , the second water inlet 15 and the second water outlet 16 are provided on the housing 1 .

The horizontal partition 4 extends into the intermediate cavity, and the length of the horizontal partition 4 in the intermediate cavity is less than the length of the intermediate cavity, and the optimal length is four-fifths of the length of the intermediate cavity , making the water flow inside the intermediate chamber, increasing the heat recovery efficiency.

The horizontal partition 4 is arranged on the center line of the shell 1 to evenly distribute the heat exchangers and improve the heat recovery efficiency.

The second water inlet 15 and the second water outlet 16 are symmetrically arranged on the housing 1 with respect to the horizontal partition 4, so as to increase the water flow distance inside the intermediate cavity and improve heat recovery efficiency.

The shape of all the vertical partitions 3 is the same as the cross-sectional shape of the shell 1, that is, the left water mixing chamber 101, the left refrigerant chamber 102, the middle chamber 103, the right refrigerant chamber 104 and the The right water chamber 105 is completely sealed and separated.

The second water inlet 15 and the second water outlet 16 are arranged on the middle cavity.

The second water inlet 15 is arranged on the lower side of the casing 1, and the second water outlet 16 is arranged on the upper side of the casing 1, so as to increase the residence time of water and increase the heat recovery efficiency.

It also includes a cone-tooth joint 5, which is arranged at the lowest point on the lower side of the left refrigerant chamber 102 to remove the liquefied refrigerant from the heat exchanger, avoiding the accumulation of refrigerant inside the heat exchanger, and ensuring The system works normally, increasing the heat exchange efficiency of the system.

As shown in Figure 2, there are two water exchange circuits:

First, enter the inside of the right water chamber 105 through the first water inlet 13, the lower side of the horizontal partition 4, and flow to the left side through the inner pipe 21 arranged on the lower side of the horizontal partition 4. In the water mixing chamber 101, after the water mixing chamber is filled, it flows through the inner pipe 21 arranged on the upper side of the horizontal partition 4 to the inside of the right water chamber 105 and the upper side of the horizontal partition 4. , and finally flow out of the heat exchanger. In this water path, water and refrigerant are between the inner tube 21 and the outer tube 22 in the middle cavity, between the left refrigerant cavity 102 and the right refrigerant cavity 104 for heat exchange;

The second one enters the lower side of the intermediate cavity through the second water inlet 15, gradually fills the intermediate cavity, and finally flows out of the intermediate cavity through the second water outlet 16. Heat exchange is performed on the outside of the outer tube 22 in the intermediate cavity.

The refrigerant passage is: through the refrigerant inlet 11, it flows into the right refrigerant chamber 104, the upper side of the horizontal partition 4, and passes through the outer tube 22 and the inner tube 21 arranged on the upper side of the horizontal partition 4 The passage between them flows into the left refrigerant chamber 102, and flows into the right refrigerant chamber 104 and the lower side of the horizontal partition 4 through the outer tube 22 arranged on the lower side of the horizontal partition 4. , and finally flows out of the heat exchanger through the refrigerant outlet 12 .

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (9)

1. A double reverse heat exchanger, comprising a shell and a heat exchange tube arranged inside the shell, the outside of the shell is provided with a refrigerant inlet, a refrigerant outlet, a first water inlet and a first water outlet, characterized in that: It also includes four layers of vertical partitions parallel to the cross-section of the housing and having the same shape as the cross-section of the housing, a second water inlet and a second water outlet, and the four layers of vertical partitions divide the housing from left to right. From right to left, it is divided into left water mixing chamber, left refrigerant chamber, middle chamber, right refrigerant chamber and right water chamber. The heat exchange tube includes an inner tube and an outer tube wrapped outside the inner tube. The inner tube communicates with The left water mixing chamber and the right water chamber, the outer tube communicates with the left refrigerant chamber and the right refrigerant chamber, and the second water inlet and the second water outlet are arranged on the housing. 2. A double reverse heat exchanger, comprising a shell and a heat exchange tube arranged inside the shell, the outside of the shell is provided with a refrigerant inlet, a refrigerant outlet, a first water inlet and a first water outlet, characterized in that: It also includes a horizontal baffle, four layers of vertical baffles parallel to the cross-section of the shell and having the same shape as the cross-section of the shell, a second water inlet and a second water outlet, the four layers of vertical baffles The shell is divided into left water mixing chamber, left refrigerant chamber, middle chamber, right refrigerant chamber and right water chamber from left to right. The horizontal partition is divided into three sections: the left section is set in the middle chamber, and the middle section is sealed It is arranged in the right refrigerant chamber, and the right section is sealed and arranged in the right water chamber and the inner side of the shell. The heat exchange tube includes an inner tube and an outer tube wrapped outside the inner tube, and the inner tube communicates with the The left water mixing chamber and the right water chamber, the outer pipe communicates with the left refrigerant chamber and the right refrigerant chamber, and the second water inlet and the second water outlet are arranged on the housing. 3. The double reverse heat exchanger according to claim 2, characterized in that: the horizontal baffle extends into the middle chamber, and the length of the horizontal baffle in the middle chamber is shorter than the length of the middle chamber. lumen length. 4. The double reverse heat exchanger according to claim 2, characterized in that: the horizontal partition is arranged on the center line of the shell. 5. The double reverse heat exchanger according to claim 4, characterized in that: the second water inlet and the second water outlet are symmetrically arranged on the shell with respect to the horizontal partition. 6. The double reverse heat exchanger according to claim 1 or 2, characterized in that all the vertical partitions have the same cross-sectional shape as the shell. 7. The double reverse heat exchanger according to any one of claims 1, 2 or 4, characterized in that: the second water inlet and the second water outlet are arranged on the intermediate cavity. 8 . The double reverse heat exchanger according to claim 8 , wherein the second water inlet is arranged on the lower side of the casing, and the second water outlet is arranged on the upper side of the casing. 9. The double reverse heat exchanger according to claim 1 or 2, characterized in that it further comprises a taper joint, and the taper joint is arranged at the lowest point on the lower side of the left refrigerant chamber.