阅读说明：本技术 换热设备、热水器和空调 (Heat exchange equipment, water heater and air conditioner ) 是由 杜顺祥 陈炳泉 赵润鹏 余锦剑 黄娟 张晓奇 于 2020-06-01 设计创作，主要内容包括：本发明提供一种换热设备、热水器和空调,涉及电器技术领域。该换热设备包括压缩机、第一冷凝器、第二冷凝器以及蒸发器,压缩机设有压缩机出口、第一入口和第二入口；所述第一冷凝器的第二端与所述第二冷凝器的第一端连接,所述第二冷凝器的第二端与所述蒸发器的第一端连接；当所述换热设备处于制热状态时,所述第一冷凝器的第一端与所述压缩机出口连接,所述蒸发器的第二端与所述压缩机的第一入口连接；所述第一冷凝器和所述第二冷凝器之间还设有与所述第二入口连接的气液分离组件,所述气液分离组件用于将流体介质中的气体和液体分离,并将所述液体送入所述第二冷凝器,所述气体由所述第二入口送入所述压缩机,换热设备的制热能力高。(The invention provides heat exchange equipment, a water heater and an air conditioner, and relates to the technical field of electric appliances. The heat exchange equipment comprises a compressor, a first condenser, a second condenser and an evaporator, wherein the compressor is provided with a compressor outlet, a first inlet and a second inlet; the second end of the first condenser is connected with the first end of the second condenser, and the second end of the second condenser is connected with the first end of the evaporator; when the heat exchange equipment is in a heating state, the first end of the first condenser is connected with the outlet of the compressor, and the second end of the evaporator is connected with the first inlet of the compressor; and a gas-liquid separation assembly connected with the second inlet is further arranged between the first condenser and the second condenser, the gas-liquid separation assembly is used for separating gas and liquid in a fluid medium and sending the liquid into the second condenser, the gas is sent into the compressor through the second inlet, and the heating capacity of the heat exchange equipment is high.)

1. A heat exchange apparatus, comprising: the condenser comprises a compressor, a first condenser, a second condenser and an evaporator, wherein the compressor is provided with a compressor outlet, a first inlet and a second inlet;

the second end of the first condenser is connected with the first end of the second condenser, and the second end of the second condenser is connected with the first end of the evaporator;

the heat exchange equipment has a heating state, when the heat exchange equipment is in the heating state, the first end of the first condenser is connected with the outlet of the compressor, the second end of the evaporator is connected with the first inlet of the compressor, and fluid media compressed by the compressor enter the first condenser;

and a gas-liquid separation assembly connected with the second inlet is further arranged between the first condenser and the second condenser, and is used for separating gas and liquid in a fluid medium and sending the liquid into the second condenser, and the gas is sent into the compressor through the second inlet.

2. The heat exchange apparatus of claim 1, wherein the gas-liquid separation assembly comprises:

a flash tank connecting the second end of the first condenser and the first end of the second condenser;

and one end of the air supplement pipeline is connected with the flash evaporator, and the other end of the air supplement pipeline is connected with the second inlet of the compressor.

3. The heat exchange device of claim 2 wherein the flash tank includes a housing having a first flash tank port, a second flash tank port, and a third flash tank port disposed thereon, the first flash tank port being connected to the second end of the first condenser, the second flash tank port being connected to the air make-up line, the third flash tank port being connected to the first end of the second condenser;

the second flash port is located at a top of the housing, and the first and third flash ports are located at a bottom of the housing facing away from the second flash port.

4. The heat exchange device of claim 2 wherein the gas make-up line is further provided with a one-way valve for allowing the gas to flow from the flash tank to the second inlet.

5. The heat exchange apparatus of claim 3, wherein the gas-liquid separation assembly comprises a first expansion valve, and two ends of the first expansion valve are respectively connected to the second end of the first condenser and the first flash port.

6. The heat exchange device of claim 2, wherein the heat exchange device has a refrigeration state, and when the heat exchange device is in the refrigeration state, the first end of the first condenser is connected to the first inlet of the compressor, and the second end of the evaporator is connected to the outlet of the compressor;

the fluid medium compressed by the compressor enters the evaporator, then the fluid medium enters the flash tank through the second condenser for gas-liquid separation, the liquid after gas-liquid separation enters the first condenser, and the gas after gas-liquid separation enters the compressor through the second inlet.

7. The heat exchange device of claim 6, comprising a four-way valve provided with a first port connected to the compressor outlet, a second port connected to the first inlet of the compressor, a third port connected to the second end of the evaporator, and a fourth port connected to the first end of the first condenser;

when the heat exchange equipment is in a heating state, the first port is connected with the fourth port, and the second port is connected with the third port; when the heat exchange equipment is in a refrigerating state, the first port is connected with the third port, and the second port is connected with the fourth port.

8. The heat exchange device of any one of claims 1 to 7, further comprising a second expansion valve connecting the second end of the second condenser and the first end of the evaporator.

9. A water heater, characterized by comprising a heat exchange water pipe and the heat exchange device of claims 1-8, wherein the heat exchange water pipe is connected with the first condenser and the second condenser;

the second condenser is located at an upstream position of the first condenser in a water flow direction.

10. An air conditioner, characterized in that, it comprises a heat exchange air duct and the heat exchange device of claims 1-8, the heat exchange air duct is connected with the first condenser and the second condenser;

the second condenser is located at an upstream position of the first condenser in an air flow direction.

Technical Field

The invention relates to the technical field of electric appliances, in particular to heat exchange equipment, a water heater and an air conditioner.

Background

Heat exchange devices are devices that allow heat to flow from one heat source to another, and are commonly used in air conditioners, water heaters, and the like.

Taking a water heater as an example, the water heater comprises heat exchange equipment and a heat exchange water pipe; a heat exchange device generally comprises a compressor, a condenser, a throttle, an evaporator and a fluid medium circulating in a refrigerant pipe, which are connected by the refrigerant pipe; the heat exchange water pipe is connected with the condenser, and water to be heated is arranged in the heat exchange water pipe. When heating is needed, the compressor compresses the fluid medium into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the condenser, so that the gas and water in the heat exchange water pipe generate heat exchange; the fluid medium is cooled and condensed, then absorbs heat by the evaporator and enters the compressor in a gas state for the next cycle, and the heat absorption temperature of water is increased.

However, the heat exchange equipment has poor heating capacity.

Disclosure of Invention

The invention provides heat exchange equipment, a water heater and an air conditioner, and aims to solve the problem of poor heating capacity of the heat exchange equipment in the related art.

The invention provides a heat exchange device, which comprises: the condenser comprises a compressor, a first condenser, a second condenser and an evaporator, wherein the compressor is provided with a compressor outlet, a first inlet and a second inlet; the second end of the first condenser is connected with the first end of the second condenser, and the second end of the second condenser is connected with the first end of the evaporator; the heat exchange equipment has a heating state, when the heat exchange equipment is in the heating state, the first end of the first condenser is connected with the outlet of the compressor, the second end of the evaporator is connected with the first inlet of the compressor, and fluid media compressed by the compressor enter the first condenser; and a gas-liquid separation assembly connected with the second inlet is further arranged between the first condenser and the second condenser, and is used for separating gas and liquid in a fluid medium and sending the liquid into the second condenser, and the gas is sent into the compressor through the second inlet.

The heat exchange device as described above, wherein the gas-liquid separation module comprises: a flash tank connecting the second end of the first condenser and the first end of the second condenser; and one end of the air supplement pipeline is connected with the flash evaporator, and the other end of the air supplement pipeline is connected with the second inlet of the compressor.

The heat exchange device comprises a shell, wherein a first flash tank port, a second flash tank port and a third flash tank port are arranged on the shell, the first flash tank port is connected with the second end of the first condenser, the second flash tank port is connected with the air supplementing pipeline, and the third flash tank port is connected with the first end of the second condenser; the second flash port is located at a top of the housing, and the first and third flash ports are located at a bottom of the housing facing away from the second flash port.

The heat exchange device as described above, wherein a check valve is further disposed on the gas supply pipeline, and is used for allowing the gas to flow from the flash tank to the second inlet.

The heat exchange device as described above, wherein the gas-liquid separation assembly includes a first expansion valve, and two ends of the first expansion valve are respectively connected to the second end of the first condenser and the first flash device port.

The heat exchange device has a refrigeration state, when the heat exchange device is in the refrigeration state, the first end of the first condenser is connected with the first inlet of the compressor, and the second end of the evaporator is connected with the outlet of the compressor; the fluid medium compressed by the compressor enters the evaporator, then the fluid medium enters the flash tank through the second condenser for gas-liquid separation, the liquid after gas-liquid separation enters the first condenser, and the gas after gas-liquid separation enters the compressor through the second inlet.

The heat exchange device comprises a four-way valve, wherein the four-way valve is provided with a first port, a second port, a third port and a fourth port, the first port is connected with an outlet of the compressor, the second port is connected with the first inlet of the compressor, the third port is connected with a second end of the evaporator, and the fourth port is connected with a first end of the first condenser; when the heat exchange equipment is in a heating state, the first port is connected with the fourth port, and the second port is connected with the third port; when the heat exchange equipment is in a refrigerating state, the first port is connected with the third port, and the second port is connected with the fourth port.

The heat exchange device as described above, wherein the heat exchange device further includes a second expansion valve, and the second expansion valve connects the second end of the second condenser and the first end of the evaporator.

The present invention provides a water heater, comprising: the heat exchange water pipe is connected with the first condenser and the second condenser; the second condenser is located at an upstream position of the first condenser in a water flow direction.

The present invention provides an air conditioner, comprising: the heat exchange air channel is connected with the first condenser and the second condenser; the second condenser is located at an upstream position of the first condenser in an air flow direction.

According to the heat exchange equipment, the water heater and the air conditioner, the circulating flow of the fluid medium can be realized by arranging the compressor, the first condenser, the second condenser and the evaporator. The first condenser and the second condenser are connected in series, so that the supercooling degree of the fluid medium can be improved while the rapid heat exchange is realized, namely, the heat exchange quantity of the fluid medium at the first condenser and the second condenser is improved. A gas-liquid separation assembly connected with a second inlet of the compressor is arranged between the first condenser and the second condenser; when the heat exchange equipment works, the fluid medium compressed by the compressor is changed into a high-temperature and high-pressure state and enters the first condenser, the fluid medium and the to-be-heated member are subjected to heat exchange in the first condenser and are subjected to heat release condensation, the cooled fluid medium enters the gas-liquid separation assembly, and the separated gas enters the compressor. The separated liquid can be further subcooled by a second condenser, and the heat release of the fluid medium becomes high. The subcooled fluid medium enters the compressor through the evaporator, gas separated from gas and liquid is mixed in the compression process of the compressor for secondary compression, the flow of the fluid medium at the first condenser and the second condenser is improved, the heat exchange quantity of the fluid medium at the first condenser and the second condenser is further increased, and the heating capacity of the heat exchange equipment is improved. Meanwhile, after air supply, the exhaust temperature of the compressor is reduced, the supercooling degree of the refrigerant flowing out of the second condenser is increased, the dryness of the fluid medium entering the evaporator is reduced, the heat exchange quantity of the fluid medium in the evaporator is improved, and particularly when the ambient temperature is low, the low-temperature heating capacity of the heat exchange equipment is improved. And through supplying air for the compressor, the compression ratio of the compressor can be improved, the input power of the compressor is increased, and partial heat is also provided for the heat exchange equipment. That is to say, the heat exchange equipment provided by the invention improves the heating capacity of the heat exchange equipment from multiple aspects.

Drawings

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description set forth herein is merely illustrative and explanatory of the present invention and is not restrictive of the invention as claimed below.

FIG. 1 is a schematic structural diagram of a heat exchange apparatus provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another heat exchange device according to an embodiment of the present invention in a heating state;

FIG. 3 is a schematic structural diagram of another heat exchange device provided in the embodiment of the present invention in a cooling state;

fig. 4 is a schematic structural view of the flash tank of fig. 1, 2 and 3.

Description of reference numerals:

10: a compressor; 11: a compressor outlet; 12: a first inlet; 13: a second inlet;

20: a first condenser;

30: a second condenser;

40: an evaporator;

50: a gas-liquid separation assembly; 51: a flash tank; 511: a housing; 512: a first flash port; 513: a second flash port; 514: a third flash port; 52: an air supply pipeline; 53: a first expansion valve; 54: a one-way valve;

60: a second expansion valve;

70: a four-way valve; 71: a first port; 72: a second port; 73: a third port; 74: a fourth port.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description set forth herein is merely illustrative and explanatory of the present invention and is not restrictive of the invention as claimed below.

When the heat exchange equipment is in a heating state, a fluid medium, namely a refrigerant, is compressed by the compressor to be changed into a high-temperature high-pressure gaseous state, the high-temperature high-pressure gaseous fluid medium enters the condenser and exchanges heat with the to-be-heated member, the heat absorption temperature of the to-be-heated member is increased, meanwhile, the fluid medium releases heat and is changed into a low-temperature high-pressure liquid state, the fluid medium then enters the evaporator through throttling and pressure reduction, the fluid medium absorbs heat in the environment in the evaporator, and the fluid medium is changed into a gaseous. However, the heat exchange amount of the heat exchange device in the evaporator and the condenser is small, which results in poor heating capability of the heat exchange device, especially in low temperature environment, and it is difficult for the fluid medium in the evaporator to absorb heat from the environment.

In view of this, the number of condensers is increased in this embodiment, for example, a first condenser and a second condenser are arranged in series, the first condenser and the to-be-heated member have a large temperature difference, so that rapid heating can be achieved, the second condenser can further heat the to-be-heated member, so that the fluid medium in the second condenser is further cooled and cooled, and the heat exchange amount of the fluid medium at the first condenser and the second condenser becomes high; meanwhile, a gas-liquid separation assembly can be arranged between the first condenser and the second condenser, so that separated liquid can enter a compressor for secondary compression, and the separated liquid enters the second condenser for supercooling; the separated gas is mixed with the gas entering the compressor from the evaporator and then is subjected to secondary compression, so that the exhaust temperature of the compressor can be reduced, the supercooling degree of the fluid medium in the second condenser is improved, the dryness of the fluid medium in the evaporator is reduced, namely, the heat absorption capacity of the fluid medium in the evaporator is improved, and the heating capacity of the heat exchange equipment is further improved.

Fig. 1 is a first structural schematic diagram of a heat exchange device according to an embodiment of the present invention, fig. 2 is a structural schematic diagram of another heat exchange device according to an embodiment of the present invention in a heating state, fig. 3 is a structural schematic diagram of another heat exchange device according to an embodiment of the present invention in a cooling state, please refer to fig. 1 to fig. 3, in which this embodiment provides a heat exchange device, including: the condenser comprises a compressor 10, a first condenser 20, a second condenser 30 and an evaporator 40, wherein the compressor 10 is provided with a compressor outlet 11, a first inlet 12 and a second inlet 13; a second end of the first condenser 20 is connected to a first end of the second condenser 30, and a second end of the second condenser 30 is connected to a first end of the evaporator 40; the heat exchange device has a heating state, when the heat exchange device is in the heating state, a first end of the first condenser 20 is connected with the outlet 11 of the compressor, a second end of the evaporator 40 is connected with the first inlet 12 of the compressor 10, and the fluid medium compressed by the compressor 10 enters the first condenser 20; a gas-liquid separation assembly 50 connected with the second inlet 13 is further arranged between the first condenser 20 and the second condenser 30, the gas-liquid separation assembly 50 is used for separating gas and liquid in the fluid medium and sending the liquid to the second condenser 30, and the gas is sent to the compressor 10 through the second inlet 13.

The heat exchange equipment can be applied to water heaters, air conditioners and other electric appliances needing heating or refrigerating. Taking a water heater as an example, the water heater comprises a heat exchange water pipe and heat exchange equipment; the heat exchange water pipe can be the coiled pipe form, and the heat release part in heat exchange water pipe and the indirect heating of indirect heating equipment is connected, is equipped with in the heat exchange water pipe and waits to add hot water, and the indirect heating water pipe can coil outside the heat release part exemplarily, and area of contact is big, and heat exchange efficiency is high. The heat exchange water pipe is provided with a water inlet and a water outlet, water to be heated enters the heat exchange water pipe from the water inlet, the temperature of the water to be heated rises after the water to be heated absorbs heat emitted by the heat releasing part in the flowing process, and the water to be heated after the temperature rise flows out from the water outlet for the next working procedure.

Wherein, the heat exchange device may include a compressor 10, a first condenser 20, a second condenser 30, and an evaporator 40 connected by refrigerant pipes. The refrigerant pipeline is internally circulated with fluid medium, the condensation temperature and the evaporation temperature of the fluid medium are low, the change of a gas phase and a liquid phase is easy to occur, and heat is absorbed or released in the change process of the gas phase and the liquid phase. The fluid medium may be any of saturated hydrocarbons, azeotropic refrigerants, non-azeotropic refrigerants, etc., depending on the performance requirements of the water heater or air conditioner.

The compressor 10 may be a reciprocating compressor, a rotary compressor, or the like, for compressing a fluid medium into a gaseous state of high temperature and high pressure.

The gaseous fluid medium compressed by the compressor 10 enters the first condenser 20 and the second condenser 30 to condense and release heat, and the first condenser 20 and the second condenser 30 can be any one of a spray condenser, a filling condenser and an air cooling condenser. The fluid medium with high temperature and high pressure is first heat exchanged with the water to be heated in the first condenser 20, so that rapid heating is achieved. The fluid medium can then be heat exchanged again with the water to be heated in the second condenser 30, the temperature of the water to be heated is further increased, the temperature of the fluid medium is further decreased, the fluid medium is subcooled, and the heat exchange amount of the fluid medium in the first condenser 20 and the second condenser 30 is increased.

The fluid medium after heat release becomes a low-temperature liquid or gas-liquid mixed state, which then enters the evaporator 40 and absorbs heat from the environment, so that the fluid medium can enter the compressor 10 in a gas state, preventing the compressor 10 from liquid compression and damaging the service life of the compressor 10. The evaporator 40 and the first and second condensers 20 and 30 are heat exchanging elements, and the structure thereof may be the same, and the evaporator 40 may be of other types known to those skilled in the art. The supercooled fluid medium absorbs a large amount of heat in the evaporator 40, and particularly, for a heat exchange device heating in a low-temperature environment, the low-temperature heating capacity of the heat exchange device is improved.

In order to further improve the heating capacity of the heat exchange device, in the present embodiment, a gas-liquid separation assembly 50 is disposed between the first condenser 20 and the second condenser 30, the fluid medium flowing out of the first condenser 20 enters the gas-liquid separation assembly 50, and the gas separated by the gas-liquid separation assembly 50 enters the compressor 10.

In the compressor 10, the compressor 10 compresses the fluid medium entering from the evaporator 40 side, and when the pressure of the compressed gas is the same as the pressure of the separated gas, the separated gas enters the compressor 10, and the compressor 10 performs two-stage compression, so that the discharge amount of the compressor 10 can be increased, that is, the flow rate of the fluid medium passing through the first condenser 20 and the second condenser 30 becomes high, and the heat exchange amount of the first condenser and the second condenser 30 becomes high. Meanwhile, the exhaust temperature of the compressor 10 can be reduced, which is helpful for improving the supercooling degree of the fluid medium at the second condenser 30, so that the dryness of the fluid medium entering the evaporator 40 through throttling expansion is reduced, the heat absorption capacity of the fluid medium in the evaporator 40 is also increased, and the low-temperature heating capacity of the heat exchange equipment used in a low-temperature environment is improved.

The heat exchange device provided by the embodiment also improves the supercooling degree of the fluid medium by arranging the first condenser 20 and the second condenser 30 which are connected in series when the rapid heat exchange is realized, increases the heat exchange amount of the fluid medium at the first condenser 20 and the second condenser 30, and improves the heating capacity of the heat exchange device. In the present embodiment, the gas-liquid separation assembly 50 connected to the second inlet 13 of the compressor 10 is further disposed at the first condenser 20 and the second condenser 30 to achieve two-stage compression of the compressor 10, so as to increase the flow rate of the fluid medium at the first condenser 20 and the second condenser 30, and further increase the heat exchange amount of the fluid medium at the first condenser 20 and the second condenser 30, that is, to improve the heating capacity of the heat exchange device. Meanwhile, the discharge temperature of the compressor 10 after air supply is reduced, the supercooling degree of the fluid medium flowing out of the second condenser 30 is increased, the dryness of the fluid medium entering the evaporator 40 is reduced, the heat absorption capacity of the fluid medium from the environment at the evaporator 40 is improved, and particularly when the environment temperature is low, the low-temperature heating capacity of the heat exchange equipment is improved. Furthermore, by supplying air to the compressor 10, the compression ratio of the compressor 10 can be increased, the input power of the compressor 10 is increased, and partial heat is also provided for the heat exchange equipment.

The gas-liquid separation assembly 50 may be a gas-liquid separator known to those skilled in the art, or the gas-liquid separation assembly 50 may include a gas pipeline connected to the second end of the first condenser 20, and connected to the second inlet 13 of the compressor 10 after passing through the first condenser 20, and the pipeline is provided with a throttle. The fluid medium flowing out of the first condenser 20 enters the compressor 10 after heat exchange with the second condenser 30 through the gas depressurized by the throttling element, and the first condenser 20 is further cooled and subcooled when heat exchange with the gas.

Considering that the present embodiment is provided with the second condenser 30 capable of performing the subcooling of the fluid medium, the gas-liquid separation assembly 50 in the present embodiment may include: a flash tank 51, the flash tank 51 connecting the second end of the first condenser 20 and the first end of the second condenser 30; an air supply line 52 has one end of the air supply line 52 connected to the flash tank 51, and the other end of the air supply line 52 connected to the second inlet 13 of the compressor 10. The flash evaporator 51 serves as a heat exchange element, the fluid medium can absorb heat in the flash evaporator 51, a part of the fluid medium changes into a gaseous state, the gaseous fluid medium is introduced into the compressor 10 from the gas supply line 52, and the liquid fluid medium which is not evaporated enters the second condenser 30.

Fig. 4 is a schematic structural diagram of the flash tank in fig. 1, 2 and 3, please refer to fig. 4, the flash tank 51 includes a housing 511, a first flash tank port 512, a second flash tank port 513 and a third flash tank port 514 are disposed on the housing 511, the first flash tank port 512 is connected to the second end of the first condenser 20, the second flash tank port 513 is connected to the gas supply line 52, and the third flash tank port 514 is connected to the first end of the second condenser 30; second flash port 513 is located at the top of housing 511 and first flash port 512 and third flash port 514 are located at the bottom of housing 511 facing away from second flash port 513.

A flash chamber is formed in the housing 511, the flash chamber having a relatively large volume, and when the fluid medium enters the housing 511 from the first flash port 512, the pressure is reduced, and a part of the liquid fluid medium is also converted into a gaseous fluid medium. Since the density of the gaseous fluid medium is lower than the density of the liquid fluid medium, a second flash chamber port 513 connected to the gas supply line 52 may be located at the top of the housing 511 to facilitate gas outflow; and a first flash tank port 512 connected to first condenser 20 and a third flash tank port 514 connected to the second condenser may be located at the bottom of shell 511 in view of the high density of the fluid medium entering flash tank 51 and the liquid fluid medium exiting flash tank 51.

To facilitate steam generation, the number of flash vaporizers 51 can include a plurality of flash chambers in parallel, or a plurality of flash vaporizers 51 can be arranged in parallel.

Furthermore, the gas supply line 52 is further provided with a check valve 54 for allowing the gas to flow from the flash tank 51 to the second inlet 13, and preventing the fluid medium in the compressor 10 from flowing back into the flash tank 51, thereby causing the fluid medium to flow in series, and the operation safety of the heat exchange device is high.

The gas-liquid separation assembly 50 further includes a first expansion valve 53, and both ends of the first expansion valve 53 are connected to the second end of the first condenser 20 and the first flash port 512, respectively.

When the heat exchange equipment heats, the first expansion valve 53 throttles for the first time to reduce the pressure of the fluid medium flowing out from the first condenser 20, so that the flash tank 51 is prevented from being subjected to high pressure, the safety of the flash tank 51 is high, the pressure of the fluid medium is reduced, and the fluid medium is easy to be heated and evaporated; meanwhile, the pressure difference between the two sides of the first expansion valve 53 can be increased by adjusting the opening degree of the first expansion valve 53, so that the air supplement quantity requirement of the air supplement pipeline 52 is met. For example, when the opening degree of the first regulating valve 53 is decreased, the flow rate of the fluid medium flowing through the first regulating valve 53 is decreased, the condensing pressure and the condensing temperature of the first condenser 20 are increased, the condensing pressure and the condensing temperature of the second condenser 30 are decreased, the pressure difference and the temperature difference between both sides of the first regulating valve 53 are increased, the gaseous fluid medium is increased, and the air supplement amount is increased

It is understood that when the condensing pressure and the condensing temperature of the first condenser 20 become high, the discharge temperature of the compressor 10 is caused to become high. The air supplement amount can be increased by reducing the opening degree of the first regulating valve 53, the exhaust temperature of the compressor 10 can be reduced after the compressor 10 performs two-stage compression, and the operation stability is high.

Optionally, in this embodiment, the opening degree of the first adjusting valve 53 may be automatically adjusted according to the condensing temperatures of the first condenser 20 and the second condenser 30, so that the heat exchange device is easy to realize automatic balance, and the operation stability is improved.

The first expansion valve 53 may be a thermal expansion valve, an electronic expansion valve, or the like.

It is understood that a second expansion valve 60 is further disposed between the second condenser 30 and the evaporator 40, the second expansion valve 60 connects the second end of the second condenser 30 and the first end of the evaporator 40, the fluid medium after passing through the first condenser 20 and the second condenser 30 becomes a low-temperature and high-pressure liquid state, in order to facilitate heat absorption of the fluid medium in the evaporator 40, the second expansion valve 60 is disposed at an upstream position of the evaporator 40, and secondary throttling of the second expansion valve 60 is used for reducing the pressure of the fluid medium, so that the fluid medium entering the evaporator 40 can become a low-temperature and low-pressure gas-liquid two-phase state.

The second expansion valve 60 and the first expansion valve 53 may be the same, or may be a thermostatic expansion valve, an electronic expansion valve, or the like.

Considering that the flow direction of the fluid medium is opposite when the heat exchange device heats and cools, the heat exchange device provided by the embodiment can also have a cooling state for reducing the temperature of the to-be-cooled element, and the to-be-cooled element can be air or water and the like. Specifically, when the heat exchange device is in a cooling state, a first end of the first condenser 20 is connected to the first inlet 12 of the compressor 10, and a second end of the evaporator 40 is connected to the compressor outlet 11; the fluid medium compressed by the compressor 10 enters the evaporator 40, then the fluid medium enters the flash tank 51 through the second condenser 30 for gas-liquid separation, the liquid after gas-liquid separation enters the first condenser 20, and the gas after gas-liquid separation enters the compressor 10 through the second inlet 13.

When the heat exchange device is used for refrigeration, the high-temperature and high-pressure gaseous fluid medium compressed by the compressor 10 enters the evaporator 40, is subjected to heat exchange with a part to be cooled in the evaporator 40, is cooled and condensed, and is subjected to primary throttling and pressure reduction by the second expansion valve 60 to become a gas-liquid two-phase mixed state.

The fluid medium then enters the second condenser 30, and heat exchange occurs between the fluid medium and the member to be cooled in the second condenser 30, at this time, the difference between the temperature of the fluid medium in the second condenser 30 and the temperature of the member to be cooled is large, the temperature reduction speed of the member to be cooled is high, and part of the fluid medium in the second condenser 30 absorbs heat and evaporates.

The fluid medium flowing out of the second condenser 30 enters the flash tank 51 through the third flash tank port 514, the gas generated in the flash tank 51 enters the gas supplementing pipeline 52 through the second flash tank port 513 and enters the compressor 10 for secondary compression, the liquid in the flash tank 51 flows out of the first flash tank port 512, enters the first condenser 20 after secondary throttling through the first expansion valve 53 for further overheat evaporation, the heat exchange amount of the fluid medium at the first condenser 20 and the second condenser 30 is high, and the refrigerating amount of the heat exchange equipment is high; and the overheating of the fluid medium at the first condenser 20 prevents the liquid fluid medium from entering the compressor 10 to be compressed, thereby reducing the service life of the compressor 10.

It is understood that, when the heat exchange preparation is in a cooling state, the opening degree of the first expansion valve 53 may be decreased in order to increase the amount of make-up air. Optionally, in this embodiment, the opening degree of the first expansion valve 53 may be automatically adjusted according to the evaporation temperatures of the first condenser 20 and the second condenser 30, so as to avoid that the evaporation temperature of the first condenser 20 is too low, which may result in frosting or icing of the second condenser 20, which is not favorable for refrigeration of the heat exchange device.

In order to switch the heating state and the cooling state on the heat exchange device, the heat exchange device includes a four-way valve 70, the four-way valve 70 may be a kind well known to those skilled in the art, for example, the four-way valve 70 may include a main valve and a pilot valve, the pilot valve has two capillary tubes connected to two side cavities in the main valve, a high pressure fluid medium and a low pressure fluid medium respectively flow in the two capillary tubes, and the sliding of the main valve slider is controlled by the pressure difference between the high pressure fluid medium and the low pressure fluid medium to switch the communication states of different pipelines.

The four-way valve 70 in this embodiment is provided with a first port 71, a second port 72, a third port 73 and a fourth port 74, the first port 71 is connected to the compressor outlet 11, the second port 72 is connected to the first inlet 12 of the compressor 10, the third port 73 is connected to the second end of the evaporator 40, and the fourth port 74 is connected to the first end of the first condenser 20; when the heat exchange device is in a heating state, the first port 71 is connected with the fourth port 74, and the second port 72 is connected with the third port 73; when the heat exchange device is in a cooling state, the first port 71 is connected with the third port 73, and the second port 72 is connected with the fourth port 74.

When the heat exchange device is in a heating state, the outlet of the compressor 10 is connected to the first end of the first condenser 20, so that the fluid medium of high temperature and high pressure can release heat at the first condenser 20 and the second condenser 30. When the heat exchange device is in a cooling state, the outlet of the compressor 10 is connected to the evaporator 40 so that the fluid medium of high temperature and high pressure can release heat at the evaporator 40 and then absorb heat at the first and second condensers 30. The four-way valve 70 can realize the switching between refrigeration and heating on the heat exchange equipment, and the structure of the heat exchange equipment is simplified.

The present embodiment provides a water heater, which includes: the heat exchange water pipe is connected with the first condenser 20 and the second condenser 30.

The heat exchange water pipe of the water heater can be in a coil pipe shape, water to be heated is arranged in the heat exchange pipe, the heat exchange pipe is provided with a water inlet and a water outlet, and the heat exchange process of the water to be heated with the first condenser 20 and the second condenser 30 is realized in the flowing process. When the heat exchange device heats, the first condenser 20 and the second condenser 30 release heat, and the temperature of the water to be heated is increased by absorbing the heat, so that hot water is provided for the next process.

When heating, because the fluid medium at the first condenser 20 has a high temperature, the first condenser 20 can be located at the upstream position of the flow direction of the water to be heated, so that the water to be heated can exchange heat with the first condenser 20 at first, the temperature difference between the fluid medium and the water to be heated is large, and the heating effect is good.

It can be understood that, when the heat exchange device is used for refrigerating, the heat exchange tube is provided with the water to be cooled, the first condenser 20 and the second condenser 30 absorb heat, and the water to be cooled can be cooled to provide low-temperature water for the next process. At this time, the temperature difference between the fluid medium at the second condenser 30 and the water to be cooled is large, the water to be cooled first exchanges heat with the second condenser 30, the temperature difference between the fluid medium and the water to be cooled is large, and the refrigeration effect is good.

The embodiment also provides an air conditioner, which includes: the heat exchange air duct is connected with the first condenser 20 and the second condenser 30.

The first condenser 20 and the second condenser 30 can be positioned in the heat exchange air channel, so that air can pass through the first condenser 20 and the second condenser 30 when flowing, the contact area is large, and the heat exchange effect is good.

Wherein the first condenser 20 may be located at an upstream position in the air flow direction. When the heat exchange equipment heats, the heat exchange air duct is internally provided with gas to be heated, the gas to be heated can firstly exchange heat with the first condenser 20, the temperature difference between the gas to be heated and the fluid medium is large, and the heating effect is good. When the heat exchange equipment is used for refrigerating, the gas to be cooled is arranged in the heat exchange air channel, the temperature difference between the fluid medium at the second condenser 30 and the gas to be cooled is large, and the refrigerating effect is good.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.