CN212377358U

CN212377358U - Series-parallel switching device, heat exchange device and air conditioner

Info

Publication number: CN212377358U
Application number: CN201922452706.2U
Authority: CN
Inventors: 蒋磊; 王明剑; 刘恒恒; 陈伟
Original assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Current assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-01-19
Anticipated expiration: 2029-12-30

Abstract

The utility model provides a cluster and parallel auto-change over device, heat exchange device and air conditioner, cluster and parallel auto-change over device include with heat exchange device intercommunication first passageway, second passageway to and the intermediate channel, can switch over the switching on or closing of first passageway, second passageway, intermediate channel, make the hot exchange pipe in the heat exchanger switch between series connection state and parallel connection state; the heat exchange device comprises a serial-parallel switching device and a heat exchange tube connected with the serial-parallel switching device, the heat exchange tube is divided into a first part and a second part, the serial-parallel switching device switches the conduction or the closing of the first channel, the second channel and the middle channel, so that the serial-parallel state between the first part and the second part is switched, the serial connection is switched during refrigeration, and the path length of refrigerant flowing is increased; the refrigerant is switched to be in parallel connection during heating, the path length of the refrigerant flowing through is reduced, the refrigerant flows through the shorter heat exchange tubes, the pressure loss is reduced, the heat exchange efficiency is further improved, and the high performance is obtained during heating.

Description

Series-parallel switching device, heat exchange device and air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to a serial-parallel switching device, a heat exchange device and an air conditioner.

Background

A heat exchange device is a device for transferring heat from one place to another, and is widely used in equipment such as a supercooled tube (metal pipe for heat exchange) in a refrigerator, an air conditioner, and the like. The supercooling pipe is used for improving the supercooling degree of the refrigerant, ensuring that the refrigerant entering the indoor unit evaporator is in a liquid state and preventing the refrigerant from evaporating in advance.

The performance of the heat exchange performance of the air-conditioning heat exchanger is directly related to the capacity and the energy efficiency of an air-conditioning system, and the core of the method is to effectively design a flow path of the heat exchanger in order to improve the performance of the whole air-conditioning machine under the condition of determining the parameters of the air-conditioning heat exchanger. In the system design process, the flow path design is often performed with a bias in emphasis on improving the cooling capacity and the energy efficiency. Therefore, longer supercooling pipes are arranged for meeting the performance requirements of the whole air conditioner during refrigeration during conventional design, but when the air conditioner operates for heating, because the flow paths during heating and refrigeration are the same and only flow in opposite directions, pressure loss can be increased when a refrigerant flows through more supercooling pipes, the heat exchange efficiency is further reduced, and high performance is not obtained during heating.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cluster and parallel auto-change over device, heat exchange device and air conditioner for solve among the prior art because of the longer problem that leads to heat exchange efficiency to reduce among the heating process of subcooling pipe.

In a first aspect of the present application, therefore, a series-parallel switching device for a heat exchange device is provided, which includes a first channel, a second channel, and an intermediate channel, the first channel, the second channel, and the intermediate channel being in communication with the heat exchange device, the series-parallel switching device being capable of switching the first channel, the second channel, and the intermediate channel on or off, so that heat exchange tubes in the heat exchange device are switched between a series state and a parallel state.

Based on the above arrangement, the heat exchange tube is divided into a first portion and a second portion, and the first portion and the second portion are switched to be connected in series by the series-parallel switching device at the time of refrigeration; when heating, the first part and the second part are switched to be connected in parallel through the serial-parallel switching device, so that the total length of the heat exchange tubes of the refrigerant flowing through the heat exchange tubes is large in the refrigerating process, refrigeration is facilitated, the heat exchange tubes of the first part and the second part are arranged in parallel in the heating process, the length of a single heat exchange tube is reduced, the refrigerant flows through the short heat exchange tubes, pressure loss is reduced, heat exchange efficiency is improved, and high performance is facilitated to be obtained in the heating process.

Further, the first channel comprises an A port and a B port, and the second channel comprises a C port and a D port; the intermediate channel comprises an E port and an F port, the A port can be respectively connected or disconnected with the B port and the D port, the C port can be respectively connected or disconnected with the B port and the D port, and the E port and the F port can be connected or disconnected.

Further, the first channel comprises an AB tube, the second channel further comprises a CD tube, and the middle channel further comprises an EF tube;

two ends of the AB pipe are respectively connected with the port A and the port B;

two ends of the CD pipe are respectively connected with the port C and the port D;

two ends of the EF pipe are respectively connected with the E port and the F port, the E port is connected with the AB pipe, and the F port is connected with the CD pipe;

an AE valve used for controlling the conduction or the closing of the AB pipe is connected to the AB pipe and is positioned between the port A and the port E;

an FD valve used for controlling the conduction or the closing of the CD pipe is connected to the CD pipe and is positioned between the F port and the D port;

and the EF pipe is connected with an EF valve used for controlling the conduction or the closing of the EF pipe.

Further, the first channel comprises an AB tube, the second channel comprises a CD tube, and the intermediate channel comprises an EF tube;

the E port is connected with the B port, and the F port is connected with the C port;

the AB pipe is connected with an AE valve for controlling the opening or closing of the AB pipe;

the CD pipe is connected with an FD valve for controlling the conduction or the closing of the CD pipe;

an F valve is connected to the CD pipe, the F port is connected with the F valve, and the F valve is used for controlling the communication between the F port and the D port or the communication between the C port and the D port.

the AB pipe is connected with an E valve, the E port is connected with the E valve, and the E valve is used for controlling the communication between the A port and the E port or between the A port and the B port;

Furthermore, the serial-parallel switching device also comprises a rotating block, wherein an AB channel, a CD channel and a BCAD channel which respectively penetrate through the rotating block are arranged on the rotating block;

the rotating block is rotatable to:

only two ends of the AB channel are respectively communicated with the A port and the B port, and two ends of the CD channel are respectively communicated with the C port and the D port;

or only two ends of the BCAD channel are respectively communicated with the port A and the port D;

or, only two ends of the BCAD channel are respectively communicated with the port B and the port C.

Furthermore, the serial-parallel switching device also comprises a sliding block, wherein an AB channel, a CD channel and a BC channel which respectively penetrate through the sliding block are arranged on the sliding block; the slider is slidable to:

or, only two ends of the BC channel are respectively communicated with the B port and the C port.

Further, the middle channel comprises a reverse pipe, and the serial-parallel switching device further comprises a head-end valve, a tail-end valve and a reverse valve;

the first channel includes a head end valve and the second channel includes a tail end valve;

one end of the reversing pipe is connected with the first channel, and the other end of the reversing pipe is connected with the second channel; the head end valve controls the conduction of the first channel or the conduction of the first channel and the reverse pipe; and the tail end valve controls the conduction of the second channel or the conduction of the second channel and the reversing pipe.

In a second aspect of the present application, there is provided a heat exchange device, including a heat exchange tube and any one of the serial-parallel switching devices in the first aspect of the present application, the heat exchange tube includes a first portion and a second portion, the first portion head and tail ports and the second portion head and tail ports are respectively connected with a first channel and a second channel of the serial-parallel switching device, and the serial-parallel switching device is configured to switch between a serial state or a parallel state of the first portion and the second portion.

Further, the second portion comprises at least two of the heat exchange tubes, the heat exchange tubes of the second portion being connected in parallel.

In a third aspect of the present application, there is provided an air conditioner comprising the series-parallel switching apparatus or the heat exchanging apparatus of any one of the first or second aspects of the present application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so that the present specification has no technical essence, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, should fall within the scope that the technical contents disclosed in the present application can cover without affecting the effects that the present application can produce and the purposes that the present application can achieve.

FIG. 1 is a schematic view of a heat exchange device in accordance with embodiment 1 of the present application, illustrating a structure thereof during a cooling operation;

FIG. 2 is a schematic structural view of a heat exchange device in example 1 of the present application during heating operation;

fig. 3 is a schematic structural diagram of a serial-parallel switching apparatus in embodiment 2 of the present application;

fig. 4 is a schematic structural diagram of a serial-parallel switching apparatus in embodiment 3 of the present application;

fig. 5 is a schematic structural diagram of a serial-parallel switching apparatus in embodiment 4 of the present application;

fig. 6 is a schematic structural diagram of an operating state of the serial-parallel switching apparatus in embodiment 5 of the present application;

fig. 7 is a schematic structural diagram of a serial-parallel switching apparatus in another operating state according to embodiment 5 of the present application;

fig. 8 is a schematic structural diagram of a serial-parallel switching apparatus in embodiment 6 of the present application;

FIG. 9 is a schematic view showing the construction of a heat exchange device in refrigeration operation in embodiment 7 of the present application;

FIG. 10 is a schematic diagram showing a possible structure of a heat exchange device in practical application in example 7 of this application;

fig. 11 is a schematic view of the structure of fig. 10 in the heating operation;

fig. 12 is a schematic structural diagram of the first part and the second part in embodiment 9 of the present application.

Description of reference numerals:

100. a heat exchange tube; 101. a first portion; 102. a second portion;

200. a serial-to-parallel switching device; 201. an A port; 202. a C port; 203. a port B; 204. a D port; 205. an AB pipe; 206. a CD tube; 207. an EF tube; 208. an AE valve; 209. an FD valve; 210. an EF valve; 211. an E port; 212. an F port; 213. an F valve; 214. an E valve;

215. rotating the block; 216. an AB channel; 217. a CD channel; 218. a BCAD channel;

219. a reversing tube; 220. a head end valve; 221. a tail end valve; 222. a reverse valve;

223. a slider; 224. and a BC channel.

Detailed Description

To further clarify the objects, technical solutions and advantages of the embodiments of the present application, reference will be made to the drawings of the embodiments of the present application in which like parts are designated by like reference numerals. The technical solutions in the embodiments of the present application are clearly and completely described, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the embodiments of the present application, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

It should be noted that, as used in the following description, the terms "front," "rear," "left," "right," "upper," "lower," "bottom" and "top" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The connecting lines not labeled in the drawings indicate the connection relationship among the components, and the connection relationship may be indirectly connected through a connecting pipe, or directly connected or connected after the end portions are extended.

Example 1

As shown in fig. 1, the present embodiment provides a heat exchange device, which includes a first channel, a second channel, and an intermediate channel, wherein the first channel, the second channel, and the intermediate channel are communicated with the heat exchange device, and the serial-parallel switching device can switch the first channel, the second channel, and the intermediate channel to be on or off, so that the heat exchange tubes 100 in the heat exchange device are switched between a serial state and a parallel state. The first channel comprises an a port 201 and a B port 203, and the second channel comprises a C port 202 and a D port 204; the intermediate channel includes an E port 211 and an F port 212, the a port 201 can be connected to or disconnected from the B port 203 and the D port 204, respectively, the C port 202 can be connected to or disconnected from the B port 203 and the D port 204, respectively, and the E port 211 and the F port 212 can be connected to or disconnected from each other.

The heat exchange tube 100 comprises a first portion 101 and a second portion 102, the first portion 101 being connected end to end with a port B203 and a port D204, respectively, and the second portion 102 being connected end to end with a port a 201 and a port C202, respectively; the serial-parallel switching device 200 can switch to: the first section 101 is connected in series or in parallel with the second section 102.

The first channel comprises an AB tube 205, the second channel further comprises a CD tube 206, and the middle channel further comprises an EF tube 207; two ends of the AB pipe 205 are respectively connected with the port A201 and the port B203; two ends of the CD pipe 206 are respectively connected with the C port 202 and the D port 204; two ends of the EF pipe 207 are respectively connected with an E port 211 and an F port 212, the E port 211 is connected with the AB pipe 205, and the F port 212 is connected with the CD pipe 206; an AE valve 208 for controlling the opening or closing of the AB pipe 205 is connected to the AB pipe 205, and the AE valve 208 is positioned between the A port 201 and the E port 211; an FD valve 209 for controlling the opening or closing of the CD pipe 206 is connected to the CD pipe 206, and the FD valve 209 is positioned between the F port 212 and the D port 204; an EF valve 210 for controlling the opening and closing of the EF tube 207 is connected to the EF tube 207.

One end of the second portion 102 is an Input port for a cooling state refrigerant or an Output port for a heating state refrigerant, and one end of the first portion 101 is an Input port for a cooling state refrigerant and an Output port for a heating state refrigerant.

Based on the above arrangement, the first part 101 and the second part 102 are switched to be connected in series by the series-parallel switching device 200 at the time of cooling; during heating, the first part 101 and the second part 102 are switched to be in parallel connection through the serial-parallel switching device 200, so that the total length of the refrigerant flowing through the heat exchange tubes 100 is large in the refrigerating process, refrigeration is facilitated, the heat exchange tubes 100 of the first part 101 and the second part 102 are arranged in parallel connection in the heating process, the length of a single heat exchange tube 100 is reduced, the refrigerant flowing through the short heat exchange tube 100 reduces pressure loss, heat exchange efficiency is improved, and high performance is achieved during heating.

During refrigeration, the AE valve 208 and the FD valve 209 are closed, and the EF valve 210 is opened, so that the AE section of the AB pipe 205 and the FD section of the CD pipe 206 are closed, the EF pipe 207 is conducted, the first part 101 and the second part 102 are connected in series, and a single total stroke of refrigerant flowing from an Input port to an Output port is increased, thereby being beneficial to refrigeration.

With reference to fig. 2, during heating, the Input port and the Output port are exchanged, the refrigerant flows in the heat exchange tube 100 in opposite directions, the AE valve 208 and the FD valve 209 are opened, and the EF valve 210 is closed, so that the AE section of the AB tube 205 and the FD section of the CD tube 206 are conducted, the EF tube 207 is closed, the first portion 101 and the second portion 102 are connected in parallel, a single total stroke of the refrigerant flowing from the Input port to the Output port is reduced, the refrigerant flows through the shorter heat exchange tube 100, pressure loss is reduced, heat exchange efficiency is improved, and high performance is obtained during heating.

The second portion 102 may include at least two heat exchange tubes 100, with the at least two heat exchange tubes 100 of the second portion 102 being connected in parallel with each other.

There may also be a third section, a fourth section, etc., with the second section 102 in parallel with the third section, the fourth section, with the plurality of heat exchange tubes 100 in the third section in parallel or in series, and the plurality of heat exchange tubes 100 in the fourth section in parallel or in series. By changing the length of the single heat exchange tube 100 of the first part 101 and the length of the single heat exchange tube 100 of the second part 102, and by switching the serial-parallel connection relationship through valves, the balance relationship between heating and cooling effects can be adjusted, and the adjustment is performed in combination with the actually required heat conversion efficiency.

Arrows on straight lines in fig. 1 and 2 indicate the flow direction of the refrigerant.

Example 2

As shown in fig. 3, the present embodiment provides a heat exchange device, which is different from embodiment 1 in that the first channel includes an AB tube 205, the second channel includes a CD tube 206, and the middle channel includes an EF tube 207; two ends of the AB pipe 205 are respectively connected with the port A201 and the port B203; two ends of the CD pipe 206 are respectively connected with the C port 202 and the D port 204; the E port 211 is connected to the B port 203, and the F port 212 is connected to the C port 202; the AB pipe 205 is connected with an AE valve 208 for controlling the opening or closing of the AB pipe 205; an FD valve 209 for controlling the conduction or the closing of the CD pipe 206 is connected on the CD pipe 206; an EF valve 210 for controlling the opening and closing of the EF tube 207 is connected to the EF tube 207.

During refrigeration, the AE valve 208 and the FD valve 209 are closed, the EF valve 210 is opened, so that the AB pipe 205 and the CD pipe 206 are closed, the EF pipe 207 is conducted, the first part 101 and the second part 102 are connected in series, and a single total stroke of refrigerant flowing from an Input port to an Output port is increased, thereby being beneficial to refrigeration.

During heating, an Input port and an Output port are exchanged, the flow directions of the refrigerant in the heat exchange tube 100 are opposite, the AE valve 208 and the FD valve 209 are opened, and the EF valve 210 is closed, so that the AB tube 205 and the CD tube 206 are communicated, the EF tube 207 is closed, the first part 101 and the second part 102 are connected in parallel, the single total stroke of the refrigerant flowing from the Input port to the Output port is reduced, the refrigerant flows through the shorter heat exchange tube 100, the pressure loss is reduced, the heat exchange efficiency is further improved, and the high performance is obtained during heating.

Example 3

As shown in fig. 4, the present embodiment provides a heat exchange device, which is different from embodiment 1 in that the first channel includes an AB tube 205, the second channel includes a CD tube 206, and the middle channel includes an EF tube 207; two ends of the AB pipe 205 are respectively connected with the port A201 and the port B203; two ends of the CD pipe 206 are respectively connected with the C port 202 and the D port 204; two ends of the EF pipe 207 are respectively connected with an E port 211 and an F port 212, the E port 211 is connected with the AB pipe 205, and the F port 212 is connected with the CD pipe 206; an AE valve 208 for controlling the opening or closing of the AB pipe 205 is connected to the AB pipe 205, and the AE valve 208 is positioned between the A port 201 and the E port 211; an F valve 213 is connected to the CD pipe 206, the F port 212 is connected to the F valve 213, and the F valve 213 controls the communication between the F port 212 and the D port 203 or the communication between the C port 202 and the D port 204.

During cooling, the AE valve 208 is closed, the F valve 213 is switched to the EF tube 207 to communicate with the B port 203, the first portion 101 and the second portion 102 are connected in series, and a single total stroke of the refrigerant flowing from the Input port to the Output port is increased, which is beneficial to cooling.

During heating, an Input port and an Output port are exchanged, the flow directions of the refrigerant in the heat exchange tube 100 are opposite, the AE valve 208 is opened, the F valve 213 is switched to the C port 202 to be communicated with the D port 204, the first part 101 is connected with the second part 102 in parallel, the total single stroke of the refrigerant flowing from the Input port to the Output port is reduced, the refrigerant flows through the shorter heat exchange tube 100, the pressure loss is reduced, the heat exchange efficiency is improved, and the high performance is obtained during heating.

Example 4

As shown in fig. 5, the present embodiment provides a heat exchange device, which is different from embodiment 1 in that the first channel includes an AB tube 205, the second channel includes a CD tube 206, and the middle channel includes an EF tube 207; two ends of the AB pipe 205 are respectively connected with the port A201 and the port B203; two ends of the CD pipe 206 are respectively connected with the C port 202 and the D port 204; two ends of the EF pipe 207 are respectively connected with an E port 211 and an F port 212, the E port 211 is connected with the AB pipe 205, and the F port 212 is connected with the CD pipe 206; an E valve 214 is connected to the AB pipe 205, an E port 211 is connected with the E valve 214, and the E valve 214 is used for controlling the communication between the A port 201 and the E port 211 or the communication between the A port 201 and the B port 203; an F valve 213 is connected to the CD pipe 206, the F port 212 is connected to the F valve 213, and the F valve 213 controls the communication between the F port 212 and the D port 203 or the communication between the C port 202 and the D port 204.

During cooling, the E valve 214 is switched to the EF tube 207 to communicate with the B port 203, the F valve 213 is switched to the EF tube 207 to communicate with the C port 202, the first portion 101 and the second portion 102 are switched to be connected in series, and the total stroke of the refrigerant flowing from the Input port to the Output port is increased, which is favorable for cooling.

During heating, an Input port and an Output port are exchanged, the flow directions of the refrigerant in the heat exchange tube 100 are opposite, the E valve 214 is switched to the A port 201 to be communicated with the B port 203, the F valve 213 is switched to the C port 202 to be communicated with the D port 204, the EF tube 207 is closed, the first portion 101 and the second portion 102 are switched to be in parallel connection, the total stroke of the refrigerant flowing from the Input port to the Output port is reduced, the refrigerant flows through the shorter heat exchange tube 100, the pressure loss is reduced, the heat exchange efficiency is improved, and high performance is obtained during heating.

Example 5

As shown in fig. 6, this embodiment provides a heat exchanging apparatus, which is different from embodiment 1 in that the serial-parallel switching apparatus 200 further includes a rotating block 215, and an AB channel 216, a CD channel 217, and a BCAD channel 218 respectively penetrating through the rotating block 215 are provided on the rotating block 215; the rotation block 215 can rotate to: only two ends of the AB channel 216 are communicated with the a port 201 and the B port 203 respectively and two ends of the CD channel 217 are communicated with the C port 202 and the D port 204 respectively; or, only two ends of the BCAD channel 218 are respectively communicated with the a port 201 and the D port 204; alternatively, only both ends of the BCAD channel 218 communicate with the B port 203 and the C port 202, respectively.

During cooling, the rotating block 215 can rotate to the state that only two ends of the BCAD channel 218 are respectively communicated with the B port 203 and the C port 202, the first portion 101 and the second portion 102 are switched to be connected in series, the total stroke of the refrigerant flowing from the Input port to the Output port is increased, and cooling is facilitated.

During heating, an Input port and an Output port are exchanged, refrigerant flows in the heat exchange tube 100 in opposite directions, the rotating block 215 can rotate to the position that only two ends of the AB channel 216 are communicated with the port A201 and the port C202 respectively, two ends of the CD channel 217 are communicated with the port B203 and the port D204 respectively, the first portion 101 and the second portion 102 are switched to be connected in parallel, the total stroke of the refrigerant flowing from the Input port to the Output port is reduced, the refrigerant flows through the short heat exchange tube 100, pressure loss is reduced, heat exchange efficiency is improved, and high performance is obtained during heating.

In order to avoid refrigerant leakage during the rotation switching process of the rotating block 215, the rotating block 215 is rotatably connected in the sealed box body.

Example 6

As shown in fig. 8, the present embodiment provides a heat exchange device, which is different from embodiment 5 in that the serial-parallel switching device 200 further includes a slider 223, and the slider 223 is provided with an AB channel 216, a CD channel 217, and a BC channel 224 respectively penetrating through the slider 223; the slider 223 can slide to: only two ends of the AB channel 216 are communicated with the a port 201 and the B port 203 respectively and two ends of the CD channel 217 are communicated with the C port 202 and the D port 204 respectively; or, only both ends of the BC channel 224 communicate with the B port 203 and the C port 202, respectively.

By sliding the slider 223 leftward, the AB channel 216 can be connected to the a port 201 and the C port 202, respectively, while the CD channel 217 is connected to the B port 203 and the D port 204, respectively, and the BC channel 224 is disconnected from the B port 203 and the C port 202, at which time the first portion 101 and the second portion 102 are switched to be in parallel.

Sliding the slider 223 to the right also disconnects the AB channel 216 from the a port 201 and the C port 202, respectively, while the CD channel 217 is disconnected from the B port 203 and the D port 204, respectively, and the BC channel 224 is connected to the B port 203 and the C port 202, at which time the first part 101 and the second part 102 are switched to series.

Example 7

As shown in fig. 9, the present embodiment provides a heat exchange apparatus, which is different from embodiment 1 in that the heat exchange apparatus includes a heat exchange tube 100 and a serial-parallel switching apparatus 200, the middle passage includes a reverse tube 219, and the serial-parallel switching apparatus 200 further includes a head-end valve 220, a tail-end valve 221, and a reverse valve 222; the first channel includes a head end valve 220 and the second channel includes a tail end valve 221; one end of the reversing pipe 219 is connected with the first channel, and the other end of the reversing pipe 219 is connected with the second channel; the head end valve 220 controls the conduction of the first channel or the conduction of the first channel and the reversing pipe 219; the tail valve 221 controls the conduction of the second channel or the conduction of the second channel and the reversing pipe 219.

During cooling, the head end valve 220 and the tail end valve 221 are closed, the reverse valve 222 is opened, and the first section 101 and the second section 102 are switched to be connected in series. During heating, the head-end valve 220 and the tail-end valve 221 are opened, the reverse valve 222 is closed, and the first section 101 and the second section 102 are switched to be connected in parallel.

The connection line between the two ends of the heat exchange tube 100 in fig. 9 shows the extension of the two ends of the heat exchange tube 100, and this embodiment has the advantages that the first portion 101 and the second portion 102 are directly connected end to end, so as to reduce additional connecting pipelines, and reduce the influence of the additional connecting pipelines on the working performance of the heat exchange device (the material of the connecting pipelines is different from that of the heat exchange tube 100, which causes different heat conduction efficiency, and the inner diameter is different from that of the heat exchange tube 100, which causes different internal pressure, etc.).

The reversing tube 219 in this embodiment may be a physical conduit or may be a passage for the reversing valve 222 itself. Therefore, without adding an additional connecting pipeline, it is only necessary to install the head-end valve 220, the tail-end valve 221 and the reverse valve 222 on the original heat exchange tube 100 (for example, a subcooled tube), and by controlling the opening and closing of the head-end valve 220, the tail-end valve 221 and the reverse valve 222, the serial/parallel state switching between the first part 101 and the second part 102 can be realized.

As shown in fig. 10 and fig. 11, fig. 10 is a schematic diagram of a possible structure of a heat exchange device in practical use, and fig. 11 is a schematic diagram of the structure of the heat exchange device in heating operation. The straight arrows in the figure indicate the refrigerant flow direction. The heat exchange tube 100 of fig. 10 and 11 is a structure and a spatial distribution relationship of the supercooling tube, but is not limited to the spatial distribution relationship.

Example 8

This embodiment provides a serial-parallel switching apparatus, which has the same structure as the serial-parallel switching apparatus 200 in any one of embodiments 1 to 7, and the functions and effects thereof are also the same, and therefore, the detailed description thereof is omitted.

Example 9

As shown in fig. 12, this embodiment provides a method for improving the operating energy efficiency of a heat exchange device, which applies any one of the heat exchange devices in embodiments 1 to 7, and switches a first part 101 and a second part 102 to be connected in series through a serial-parallel switching device 200 during refrigeration; in heating, the first part 101 and the second part 102 are switched in parallel by the series-parallel switching device 200.

In the process of refrigeration, the total length of the refrigerant flowing through the heat exchange tubes 100 is large, which is beneficial to refrigeration, and in the process of heating, the heat exchange tubes 100 of the first part 101 and the second part 102 are arranged in parallel, so that the length of a single heat exchange tube 100 is reduced, the refrigerant flowing through the short heat exchange tubes 100 reduces pressure loss, further, the heat exchange efficiency is improved, and high performance is obtained in the process of heating.

The heat exchange tubes 100 of the second section 102 are arranged in parallel and the heat exchange tubes 100 of the first section 101 are arranged in series, but the combination is not limited thereto, and in practice, in another possible example, there may be a third section, a fourth section, etc. in the second section 102, the second section 102 is connected in parallel with the third section, the third section is connected in series with the fourth section, the heat exchange tubes 100 in the third section are connected in parallel, and the heat exchange tubes 100 in the fourth section are connected in series; also present in the first section 101 may be a fifth section, a sixth section, etc., the first section 101 being in parallel with the fifth section, the first section 101 being in series with the sixth section, the heat exchange tubes 100 in the first section 101 being in series, the heat exchange tubes 100 in the fifth section being in parallel. By changing the length of the single heat exchange tube 100 of the first part 101 and the length of the single heat exchange tube 100 of the second part 102, and by switching the serial-parallel connection relationship through valves, the balance relationship between heating and cooling effects can be adjusted, and the adjustment is performed in combination with the actually required heat conversion efficiency.

Example 10

The present embodiment provides an air conditioner including the heat exchanging device or the serial-parallel switching device 200 of any one of embodiments 1 to 8.

The arrangement of the heat exchange tubes 100 in the above embodiments is not limited to the schematic illustration in the drawings, in which a part of the line indicates the extension of the end of the tube or heat exchange tube 100.

The "port" (for example, the a port 201, the B port 203, etc.) in the above embodiments represents a port, a joint, or an interface of a pipe, and when the position of the port is between two ends of the pipe, it represents a point, and is marked for convenience of describing the technical solution, for example, the serial-parallel switching apparatus 200 in embodiment 7, and when the port or the interface represents a point, the serial-parallel switching apparatus 200 in the embodiment has the same structure as the serial-parallel switching apparatus 200 in the embodiment, and therefore, the "port" is not limited to the structure, and may be a port or an interface having an actual structure, and may also be a point.

The specific embodiments in this specification are merely illustrative of the present application and are not limiting, and those skilled in the art can modify the embodiments without inventive contribution as required after reading this specification, but only protected by the patent laws within the scope of the claims of the present application.

Claims

1. A series-parallel switching device for a heat exchange device is characterized by comprising a first channel, a second channel and an intermediate channel which are communicated with the heat exchange device, wherein the series-parallel switching device can switch the first channel, the second channel and the intermediate channel to be switched on or off, so that heat exchange tubes (100) in the heat exchange device are switched between a series state and a parallel state.

2. The deserializing apparatus of claim 1, wherein the first lane comprises an a port (201) and a B port (203), and the second lane comprises a C port (202) and a D port (204); the intermediate channel comprises an E port (211) and an F port (212), the A port (201) can be connected with or disconnected from the B port (203) and the D port (204), the C port (202) can be connected with or disconnected from the B port (203) and the D port (204), and the E port (211) and the F port (212) can be connected or disconnected.

3. The serial-to-parallel switching apparatus of claim 2, wherein the first channel comprises an AB tube (205), the second channel further comprises a CD tube (206), the intermediate channel further comprises an EF tube (207);

the two ends of the AB pipe (205) are respectively connected with the A port (201) and the B port (203);

the two ends of the CD pipe (206) are respectively connected with the C port (202) and the D port (204);

the two ends of the EF pipe (207) are respectively connected with the E port (211) and the F port (212), the E port (211) is connected with the AB pipe (205), and the F port (212) is connected with the CD pipe (206);

an AE valve (208) used for controlling the AB pipe (205) to be conducted or closed is connected to the AB pipe (205), and the AE valve (208) is located between the A port (201) and the E port (211);

an FD valve (209) used for controlling the opening or closing of the CD pipe (206) is connected to the CD pipe (206), and the FD valve (209) is positioned between the F port (212) and the D port (204);

and an EF valve (210) used for controlling the conduction or the closing of the EF pipe (207) is connected to the EF pipe (207).

4. The serial-to-parallel switching apparatus of claim 2, wherein the first channel comprises an AB tube (205), the second channel comprises a CD tube (206), and the intermediate channel comprises an EF tube (207);

the E port (211) is connected with the B port (203), and the F port (212) is connected with the C port (202);

an AE valve (208) for controlling the opening or closing of the AB pipe (205) is connected to the AB pipe (205);

an FD valve (209) for controlling the conduction or the closing of the CD pipe (206) is connected to the CD pipe (206);

5. The serial-to-parallel switching apparatus of claim 2, wherein the first channel comprises an AB tube (205), the second channel comprises a CD tube (206), and the intermediate channel comprises an EF tube (207);

an F valve (213) is connected to the CD pipe (206), the F port (212) is connected with the F valve (213), and the F valve (213) is used for controlling the communication between the F port (212) and the D port (204) or the communication between the C port (202) and the D port (204).

6. The serial-to-parallel switching apparatus of claim 2, wherein the first channel comprises an AB tube (205), the second channel comprises a CD tube (206), and the intermediate channel comprises an EF tube (207);

an E valve (214) is connected to the AB pipe (205), the E port (211) is connected with the E valve (214), and the E valve (214) is used for controlling the communication between the A port (201) and the E port (211) or the communication between the A port (201) and the B port (203);

7. The serial-parallel switching device according to claim 2, wherein the serial-parallel switching device (200) further comprises a rotating block (215), and an AB channel (216), a CD channel (217) and a BCAD channel (218) are respectively arranged on the rotating block (215) and penetrate through the rotating block (215); the rotating block (215) is rotatable to:

only two ends of the AB channel (216) are respectively communicated with the A port (201) and the B port (203) and two ends of the CD channel (217) are respectively communicated with the C port (202) and the D port (204);

or, only two ends of the BCAD channel (218) are respectively communicated with the A port (201) and the D port (204);

or, only two ends of the BCAD channel (218) are respectively communicated with the B port (203) and the C port (202).

8. The serial-parallel switching device according to claim 2, wherein the serial-parallel switching device (200) further comprises a slider (223), and an AB channel (216), a CD channel (217) and a BC channel (224) are respectively arranged on the slider (223) and penetrate through the slider (223); the slider (223) is slidable to:

or, only two ends of the BC channel (224) are respectively communicated with the B port (203) and the C port (202).

9. The series-parallel switching apparatus according to claim 1, wherein the intermediate passage comprises a reversing pipe (219), the series-parallel switching apparatus (200) further comprising a head-end valve (220), a tail-end valve (221), and a reversing valve (222);

the first channel comprises a head end valve (220) and the second channel comprises a tail end valve (221); one end of the reverse pipe (219) is connected with the first channel, and the other end of the reverse pipe (219) is connected with the second channel; the head end valve (220) controls the conduction of the first channel or the conduction of the first channel and the reversing pipe (219); the tail end valve (221) controls the conduction of the second channel or the conduction of the second channel and the reversing pipe (219).

10. A heat exchange device, characterized by comprising a heat exchange tube (100) and a serial-parallel switching device (200) according to any one of claims 1 to 9, wherein the heat exchange tube (100) comprises a first part (101) and a second part (102), the head-to-tail ports of the first part (101) and the head-to-tail ports of the second part (102) are respectively connected with a first channel and a second channel of the serial-parallel switching device (200), and the serial-parallel switching device (200) is used for switching the first part (101) and the second part (102) in a serial state or a parallel state.

11. The heat exchange device according to claim 10, wherein the second portion (102) comprises at least two of the heat exchange tubes (100), the heat exchange tubes (100) of the second portion (102) being connected in parallel.

12. An air conditioner, characterized in that it comprises a serial-parallel switching device (200) according to any one of claims 1 to 9 or a heat exchange device according to any one of claims 10 to 11.