Evaporation cold and heat combined supply four-pipe unit

Abstract

The embodiment of the utility model provides an evaporation cooling cold and heat combined supply four-pipe unit which comprises a refrigerant circulating system, a four-way valve, a compressor, an air cooling fin heat exchanger, a heat recoverer and an evaporator, the four-way valve is provided with a first port, a second port, a third port and a fourth port, the first port and the third port are connected with the compressor, and the compressor is connected with the evaporator. The second port is connected with the air-cooled fin heat exchanger, the fourth port is connected with the heat recoverer, the heat recoverer and the air-cooled fin heat exchanger are respectively connected with the evaporator, and the evaporator is connected with the compressor; one end of the evaporative condenser is connected with the second port and the fourth port, and the other end of the evaporative condenser is connected with the evaporator. Compared with air cooling, more energy is saved, the amount of refrigerants entering the evaporative condenser is adjusted, the heat recovery amount is controlled, and the problem that operation is unstable due to frequent switching of the four-way valve is solved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an evaporative cooling and heating combined supply four-pipe unit. Background Art

[0002] With the rapid development of economy, the demand for air conditioning in working and living environments is becoming more and more urgent. Four-pipe air conditioners are widely used in hospitals and other places because they can provide hot and cold water at the same time.

[0003] Most of the current four-pipe units are air-cooled four-pipe units. When operating in cooling mode, the condensing temperature is high, the refrigeration performance coefficient is low, and it is not energy-efficient. Moreover, when operating in cooling and heating mode at the same time, the condenser can only be switched through a four-way valve. When the cooling capacity is large and the heating capacity is small, the condenser will be switched frequently, and the operation is particularly unstable. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an evaporative cooling and heat supply four-pipe unit, which is more energy-efficient than air cooling and can adjust the amount of refrigerant entering the evaporative condenser to control the amount of heat recovery, thereby solving the problem of unstable operation caused by frequent switching of the four-way valve.

[0005] In the first aspect, an embodiment of the present application provides an evaporative cooling and heat combined supply four-pipe unit, comprising: a refrigerant circulation system, including a four-way valve, a compressor, an air-cooled fin heat exchanger, a heat recovery device and an evaporator, the four-way valve is configured with a first port, a second port, a third port and a fourth port, the first port and the third port are respectively connected to the compressor, the second port is connected to the air-cooled fin heat exchanger, the fourth port is connected to the heat recovery device, the air-cooled fin heat exchanger and the evaporator are respectively connected to the heat recovery device, and the evaporator is connected to the compressor; an evaporative condenser, one end of which is respectively connected to the second port and the fourth port, and the other end of which is respectively connected to the evaporator.

[0006] In the above-mentioned implementation process, the heat recovery device, the air-cooled fin heat exchanger, the evaporative condenser, the evaporator and the compressor are respectively connected to the four-way valve. By switching the conduction mode of the four-way valve, when the refrigeration mode is operated, the high-temperature and high-pressure refrigerant gas compressed and discharged is only dissipated through the evaporative condenser, thereby reducing its condensation temperature and improving the energy efficiency ratio, which is more energy-efficient than air cooling; when the heat recovery mode is operated, the amount of refrigerant entering the evaporative condenser can be controlled to achieve the amount of heat recovery, thereby solving the problem of unstable operation caused by frequent switching of the refrigerant direction by the four-way valve.

[0007] In some embodiments, the evaporative cooling and heating combined heat and cold supply four-pipe unit further includes an electric valve, and the electric valve is connected to the pipeline between the evaporative condenser and the fourth port.

[0008] In the above implementation process, an electric valve is arranged between the evaporative condenser and the fourth port of the four-way valve, and the conduction mode of the four-way valve is switched, so that the evaporative cooling and heat combined supply four-pipe unit operates in heat recovery mode. By adjusting the opening of the electric valve, the amount of refrigerant entering the evaporative condenser is controlled to achieve the control of the amount of heat recovery, thereby solving the problem of unstable operation caused by frequent switching of the refrigerant direction by the four-way valve.

[0009] In some embodiments, when the evaporative cooling and heating combined heat and cold supply four-pipe unit operates in cooling mode, the first port is connected to the second port, and the evaporative condenser and the evaporator are configured to be in a conducting state.

[0010] In the above-mentioned implementation process, when the evaporative cooling and heating combined supply four-pipe unit operates in the refrigeration mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor, passes through the first port and the second port of the four-way valve, and is condensed into a high-pressure and high-temperature liquid refrigerant in the evaporative condenser. After throttling (isenthalpic pressure reduction), the refrigerant becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat in the evaporator and becomes a low-temperature and low-pressure gaseous refrigerant. The high-temperature chilled water becomes low-temperature chilled water after passing through the evaporator, and the low-temperature and low-pressure gaseous refrigerant returns to the compressor to complete a cycle.

[0011] In some embodiments, when the evaporative cooling and heating combined supply four-pipe unit operates in heating mode, the first port is connected to the fourth port, the second port is connected to the third port, and the heat recovery device and the air-cooled fin heat exchanger are configured to be in a conducting state.

[0012] In the above-mentioned implementation process, when the evaporative cooling and heating four-pipe unit operates in the heating mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor, passes through the first port and the fourth port of the four-way valve to the heat recovery device to condense into a high-temperature and high-pressure liquid refrigerant, wherein the electric valve is in a closed state. At this time, the low-temperature hot water absorbs the heat of the refrigerant through the heat recovery device to become high-temperature hot water. After throttling (isenthalpic pressure reduction), the high-temperature and high-pressure liquid refrigerant becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs the heat of the external ambient temperature in the air-cooled fin heat exchanger to become a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant passes through the second port and the third port of the four-way valve back to the compressor to complete a cycle.

[0013] In some embodiments, when the evaporative cooling and heating combined heat and cold four-pipe unit operates in the first heat recovery mode, the first port is connected to the fourth port, the electric valve is configured to be in an open state, and the heat recovery device and the evaporator as well as the evaporative condenser and the evaporator are all configured to be in a conducting state.

[0014] In the above-mentioned implementation process, when the evaporative cooling and heating four-pipe unit operates in the first heat recovery mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor, passes through the first port and the second port of the four-way valve to the heat recovery device and the evaporative condenser, and is condensed by the evaporative condenser and the heat recovery device to become a high-temperature and high-pressure liquid refrigerant, respectively. The heat recovery amount can be controlled by adjusting the refrigerant flow to the evaporative condenser by an electric valve. At this time, the low-temperature hot water absorbs the heat of the refrigerant through the heat recovery device to become high-temperature hot water. After throttling (isenthalpic pressure reduction), the refrigerant becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat in the evaporator again to become a low-temperature and low-pressure gaseous refrigerant. The high-temperature chilled water becomes low-temperature chilled water after passing through the evaporator, and the low-temperature and low-pressure gaseous refrigerant returns to the compressor to complete a cycle.

[0015] In some embodiments, when the evaporative cooling and heating combined supply four-pipe unit operates in the second heat recovery mode, the first port is connected to the fourth port, the second port is connected to the third port, the electric valve is configured to be in a closed state, and the heat recovery device and the air-cooled fin heat exchanger as well as the heat recovery device and the evaporator are configured to be in a conducting state.

[0016] In the above-mentioned implementation process, when the evaporative cooling and heating combined supply four-pipe unit operates in the second heat recovery mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor, passes through the first port and the fourth port of the four-way valve to the heat recovery device, and is condensed into a high-temperature and high-pressure liquid refrigerant, wherein the electric valve is in a closed state. At this time, the low-temperature hot water enters the superheat recovery device to absorb the heat of the refrigerant and becomes high-temperature hot water. The high-temperature and high-pressure liquid refrigerant is converted into a low-temperature and low-pressure liquid refrigerant after isenthalpic pressure reduction, and absorbs the heat of the external ambient temperature in the air-cooled fin heat exchanger, and becomes a low-temperature and low-pressure gaseous refrigerant and passes through the second port and the third port of the four-way valve. The other refrigerant is converted into a low-temperature and low-pressure liquid refrigerant after isenthalpic pressure reduction, and absorbs heat in the evaporator to become a low-temperature and low-pressure gaseous refrigerant and merges with the refrigerant passing through the four-way valve and returns to the compressor, while the high-temperature chilled water is converted into low-temperature chilled water after passing through the evaporator, completing a cycle.

[0017] In some embodiments, the evaporative cooling and heating combined cooling and heating four-pipe unit includes a first expansion valve, the first expansion valve is connected to the pipeline between the heat recovery device and the evaporator, and the evaporative condenser is connected to the pipeline between the heat recovery device and the first expansion valve. By arranging the first expansion valve in the pipeline between the heat recovery device and the evaporator, the cooling output can be adjusted by adjusting the opening of the first expansion valve.

[0018] In some embodiments, the evaporative cooling and heating combined heat and cold four-pipe unit further includes a second expansion valve, one end of the second expansion valve is connected to the air-cooled fin heat exchanger, and the other end of the second expansion valve is connected to the pipeline between the heat recovery device and the first expansion valve. By arranging the second expansion valve on the pipeline connected to the air-cooled fin heat exchanger, the opening of the second expansion valve can be adjusted, and the amount of refrigerant entering the air-cooled fin heat exchanger can be adjusted.

[0019] In some embodiments, the evaporative cooling and heating combined heat and cold four-pipe unit also includes a first one-way component, the first one-way component includes a first one-way valve and a second one-way valve, the first one-way valve connects the pipeline between the heat recovery device and the evaporator, and the second one-way valve connects the pipeline between the first one-way valve and the evaporator.

[0020] In some embodiments, the evaporative cooling and heat combined supply four-pipe unit also includes a second one-way component, the second one-way component includes a third one-way valve and a fourth one-way valve, the third one-way valve connects the pipeline between the air-cooled fin heat exchanger and the second port, one end of the fourth one-way valve is connected to the evaporative condenser, and the other end of the fourth one-way valve is connected to the pipeline between the third one-way valve and the second port.

[0021] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a four-pipe evaporative cooling and heating combined heat and cold supply unit provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the principle of the evaporative cooling and heating combined supply four-pipe unit operating in the cooling mode provided in the embodiment of the present application;

[0026] Figure 3A schematic diagram of the principle of the heating mode of the evaporative cooling and heating combined supply four-pipe unit provided in the embodiment of the present application;

[0027] Figure 4 A schematic diagram of the principle of the evaporative cooling and heating combined supply four-pipe unit operating in the first heat recovery mode provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the principle of the evaporative cooling and heating combined heat and cold four-pipe unit operating in the second heat recovery mode provided in an embodiment of the present application.

[0029] Reference numerals

[0030] 10. Refrigerant circulation system; 11. Four-way valve; 111. First port; 112. Second port; 113. Third port; 114. Fourth port; 12. Compressor; 13. Air-cooled fin heat exchanger; 14. Heat recovery device; 15. Evaporator; 20. Evaporative condenser; 30. Electric valve; 40. First expansion valve; 50. Second expansion valve; 60. First check valve; 70. Second check valve; 80. Third check valve; 90. Fourth check valve. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0032] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0034] Example

[0035] Currently, most four-pipe units are air-cooled. When operating in cooling mode, the condensing temperature is high, the refrigeration performance coefficient is low, and it is not energy-efficient. Moreover, when operating in cooling and heating mode at the same time, the condenser can only be switched through a four-way valve. When the cooling capacity is large and the heating capacity is small, the condenser will be switched frequently, and the operation is particularly unstable.

[0036] In view of this, if Figure 1-Figure 5 As shown, in the first aspect, an embodiment of the present application provides an evaporative cooling and heating combined supply four-pipe unit, comprising: a refrigerant cycle system 10, comprising a four-way valve 11, a compressor 12, an air-cooled fin heat exchanger 13, a heat recovery device 14 and an evaporator 15, the four-way valve 11 is configured with a first port 111, a second port 112, a third port 113 and a fourth port 114, the first port 111 and the third port 113 are respectively connected to the compressor 12, the second port 112 is connected to the air-cooled fin heat exchanger 13, the fourth port 114 is connected to the heat recovery device 14, the air-cooled fin heat exchanger 13 and the evaporator 15 are respectively connected to the heat recovery device 14, and the evaporator 15 is connected to the compressor 12; an evaporative condenser 20, one end of which is respectively connected to the second port 112 and the fourth port 114, and the other end of which is respectively connected to the evaporator 15.

[0037] Exemplarily, the evaporative cooling and heat supply four-pipe unit includes but is not limited to the evaporative cooling four-pipe unit, and the evaporative cooling and heat supply four-pipe unit includes a cooling mode, a heating mode, a first heat recovery mode, and a second heat recovery mode.

[0038] In the above-mentioned implementation process, the heat recovery device 14, the air-cooled fin heat exchanger 13, the evaporative condenser 20, the evaporator 15 and the compressor 12 are respectively connected to the four-way valve 11. By switching the conduction mode of the four-way valve 11, when the refrigeration mode is operated, the high-temperature and high-pressure refrigerant gas compressed and discharged is only dissipated through the evaporative condenser 20, thereby reducing its condensation temperature and improving the energy efficiency ratio, which is more energy-efficient than air cooling; when the heat recovery mode is operated, the amount of refrigerant entering the evaporative condenser 20 can be controlled to achieve the amount of heat recovery, thereby solving the problem of unstable operation caused by frequent switching of the refrigerant direction by the four-way valve 11.

[0039] like Figure 1 As shown, the evaporative cooling and heating combined heat and cold four-pipe unit further includes an electric valve 30 , and the electric valve 30 is connected to the pipeline between the evaporative condenser 20 and the fourth port 114 .

[0040] In the above-mentioned implementation process, an electric valve 30 is arranged between the evaporative condenser 20 and the fourth port 114 of the four-way valve 11, and the conduction mode of the four-way valve 11 is switched, so that the evaporative cooling and heating combined supply four-pipe unit operates in a heat recovery mode. By adjusting the opening of the electric valve 30, the amount of refrigerant entering the evaporative condenser 20 is controlled to achieve the control of the amount of heat recovery, thereby solving the problem of unstable operation caused by frequent switching of the refrigerant direction by the four-way valve 11.

[0041] like Figure 2 As shown, when the evaporative cooling and heating combined heat and cold supply four-pipe unit operates in cooling mode, the first port 111 is connected to the second port 112, and the evaporative condenser 20 and the evaporator 15 are configured to be in a conducting state. At this time, the first port 111 is configured as the inlet of the refrigerant, and the second port 112 is configured as the outlet of the refrigerant.

[0042] In the above-mentioned implementation process, when the evaporative cooling and heating combined supply four-pipe unit operates in the refrigeration mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 12, passes through the first port 111 and the second port 112 of the four-way valve 11, and enters the evaporative condenser 20 through the fourth one-way valve 90, and is condensed into a high-pressure and high-temperature liquid refrigerant in the evaporative condenser 20. Through isenthalpic pressure reduction (i.e., the function of the first expansion valve 40), the refrigerant is turned into a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat in the evaporator 15 and becomes a low-temperature and low-pressure gaseous refrigerant. The high-temperature chilled water becomes low-temperature chilled water after passing through the evaporator 15, and the low-temperature and low-pressure gaseous refrigerant returns to the compressor 12 to complete a cycle.

[0043] like Figure 3 As shown, when the evaporative cooling and heating combined supply four-pipe unit operates in heating mode, the first port 111 is connected to the fourth port 114, the second port 112 is connected to the third port 113, and the heat recovery device 14 and the air-cooled fin heat exchanger 13 are configured to be in a conducting state. It should be noted that when the heating mode is operated, the air-cooled fin heat exchanger 13 can be used as the evaporator 15 and can also solve the problem of antifreeze when the evaporative condenser 20 is used as the evaporator 15.

[0044] In the above-mentioned implementation process, when the evaporative cooling and heating combined supply four-pipe unit operates in the heating mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 12, passes through the first port 111 and the fourth port 114 of the four-way valve 11 to the heat recovery device 14 to condense into a high-temperature and high-pressure liquid refrigerant, wherein the electric valve 30 is in a closed state, at this time, the low-temperature hot water absorbs the heat of the refrigerant through the heat recovery device 14 to become high-temperature hot water, and through isenthalpic pressure reduction (i.e., the function of the second expansion valve 50), the high-temperature and high-pressure liquid refrigerant becomes a low-temperature and low-pressure liquid refrigerant, and the low-temperature and low-pressure liquid refrigerant absorbs the heat of the external ambient temperature in the air-cooled fin heat exchanger 13 to become a low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-pressure gaseous refrigerant passes through the third one-way valve 80 and the second port 112 and the third port 113 of the four-way valve 11 back to the compressor 12 to complete a cycle.

[0045] like Figure 4 As shown, when the evaporative cooling and heating combined supply four-pipe unit operates in the first heat recovery mode (i.e., heating + cooling, wherein cooling is adjustable from 0 to 100%), the first port 111 is connected to the fourth port 114, the electric valve 30 is configured to be in an open state, and the heat recovery device and the evaporator 15 as well as the evaporative condenser 20 and the evaporator 15 are all configured to be in a conducting state.

[0046] In the above-mentioned implementation process, when the evaporative cooling and heating combined supply four-pipe unit operates in the first heat recovery mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 12, passes through the first port 111 and the second port 112 of the four-way valve 11 to the heat recovery device 14 and the evaporative condenser 20 (the electric valve 30 is in an open state to allow the refrigerant to enter the evaporative condenser 20), and is condensed into a high-temperature and high-pressure liquid refrigerant through the evaporative condenser 20 and the heat recovery device, respectively, wherein the electric valve 30 can be adjusted to the evaporative condenser 20. The refrigerant flow controls the amount of heat recovery. At this time, the low-temperature hot water absorbs the heat of the refrigerant through the heat recovery device 14 and becomes high-temperature hot water. Through isenthalpic pressure reduction (that is, the refrigerant passes through the first one-way valve 60 and the second one-way valve 70 and then merges and flows to the first expansion valve 40), the refrigerant becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat in the evaporator 15 and becomes a low-temperature and low-pressure gaseous refrigerant. The high-temperature chilled water becomes low-temperature chilled water after passing through the evaporator 15, and the low-temperature and low-pressure gaseous refrigerant returns to the compressor 12 to complete a cycle.

[0047] like Figure 5As shown, when the evaporative cooling and heating combined supply four-pipe unit operates in the second heat recovery mode (i.e., heating + cooling, wherein heating is adjustable from 0 to 100%), the first port 111 is connected to the fourth port 114, the second port 112 is connected to the third port 113, the electric valve 30 is configured to be in a closed state, and the heat recovery device 14 and the air-cooled fin heat exchanger 13 as well as the heat recovery device and the evaporator 15 are all configured to be in a conducting state.

[0048] In the above implementation process, when the evaporative cooling and heating combined supply four-pipe unit operates in the second heat recovery mode, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 12, passes through the first port 111 and the fourth port 114 of the four-way valve 11 to the heat recovery device 14 to condense into a high-temperature and high-pressure liquid refrigerant, wherein the electric valve 30 is in a closed state, and at this time, the low-temperature hot water enters the heat recovery device 14 to absorb the heat of the refrigerant and becomes high-temperature hot water, and by adjusting the pressure and flow of the pipeline (that is, the refrigerant flows to the first expansion valve 40 respectively after passing through the first check valve 60) And the second expansion valve 50), so that the refrigerant becomes a low-temperature and low-pressure liquid refrigerant, one of which absorbs the heat of the external ambient temperature in the air-cooled fin heat exchanger 13 and becomes a low-temperature and low-pressure gaseous refrigerant and passes through the second port 112 and the third port 113 of the four-way valve 11, and the other refrigerant absorbs heat in the evaporator 15 and becomes a low-temperature and low-pressure gaseous refrigerant and merges with the refrigerant passing through the four-way valve 11, and returns to the compressor 12, and the high-temperature chilled water becomes low-temperature chilled water after passing through the evaporator 15, completing a cycle.

[0049] In some embodiments, the evaporative cooling and heating combined cooling and heating four-pipe unit includes a compressor 12, an electric valve 30 and a first expansion valve 40, wherein the first expansion valve 40 is connected to the pipeline between the heat recovery device 14 and the evaporator 15, and the evaporative condenser 20 is connected to the pipeline between the heat recovery device 14 and the first expansion valve 40. By arranging the first expansion valve 40 in the pipeline between the heat recovery device 14 and the evaporator 15, the cooling output can be adjusted by adjusting the opening of the first expansion valve 40; the heat output can be adjusted by adjusting the electric valve 30, and the cooling output of the first expansion valve 40 can be adjusted by adjusting the compressor 12.

[0050] In some embodiments, the evaporative cooling and heating combined cooling and heating four-pipe unit further includes a second expansion valve 50, one end of the second expansion valve 50 is connected to the air-cooled fin heat exchanger 13, and the other end of the second expansion valve 50 is connected to the pipeline between the heat recovery device 14 and the first expansion valve 40. By arranging the second expansion valve 50 on the pipeline connected to the air-cooled fin heat exchanger 13, the opening of the second expansion valve 50 can be adjusted, and the amount of refrigerant entering the air-cooled fin heat exchanger 13 can be adjusted; that is, the second expansion valve 50 can be adjusted by the compressor 12 to control the heat output, and the cooling output can be adjusted by the first expansion valve 40.

[0051] In some embodiments, the evaporative cooling and heating combined heat and cold four-pipe unit also includes a first one-way component, which includes a first one-way valve 60 and a second one-way valve 70. The first one-way valve 60 connects the pipeline between the heat recovery device 14 and the evaporator 15, and the second one-way valve 70 connects the pipeline between the first one-way valve 60 and the evaporator 15.

[0052] In some embodiments, the evaporative cooling and heating combined heat and cold four-pipe unit also includes a second one-way component, the second one-way component includes a third one-way valve 80 and a fourth one-way valve 90, the third one-way valve 80 connects the pipeline between the air-cooled fin heat exchanger 13 and the second port 112, one end of the fourth one-way valve 90 is connected to the evaporative condenser 20, and the other end of the fourth one-way valve 90 is connected to the pipeline between the third one-way valve 80 and the second port 112.

[0053] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0054] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0055] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An evaporative cooling and heating combined heat and cold four-pipe unit, characterized in that: include: A refrigerant circulation system, comprising a four-way valve, a compressor, an air-cooled fin heat exchanger, a heat recovery device and an evaporator, wherein the four-way valve is provided with a first port, a second port, a third port and a fourth port, wherein the first port and the third port are respectively connected to the compressor, the second port is connected to the air-cooled fin heat exchanger, the fourth port is connected to the heat recovery device, the air-cooled fin heat exchanger and the evaporator are respectively connected to the heat recovery device, and the evaporator is connected to the compressor; An evaporative condenser has one end connected to the second port and the fourth port respectively, and the other end connected to the evaporator respectively.

2. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 1, characterized in that: The evaporative cooling and heating combined heat and cold supply four-pipe unit further includes an electric valve, which is connected to a pipeline between the evaporative condenser and the fourth port.

3. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 1, characterized in that: When the evaporative cooling and heating combined heat and cold supply four-pipe unit operates in cooling mode, the first port is connected to the second port, and the evaporative condenser and the evaporator are configured to be in a conducting state.

4. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 1, characterized in that: When the evaporative cooling and heating combined supply four-pipe unit operates in heating mode, the first port is connected to the fourth port, the second port is connected to the third port, and the heat recovery device and the air-cooled fin heat exchanger are configured to be in a conducting state.

5. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 2, characterized in that: When the evaporative cooling and heating combined heat and cold four-pipe unit operates in the first heat recovery mode, the first port is connected to the fourth port, the electric valve is configured to be in an open state, and the heat recovery device and the evaporator as well as the evaporative condenser and the evaporator are configured to be in a conducting state.

6. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 2 or 5, characterized in that: When the evaporative cooling and heating combined supply four-pipe unit operates in the second heat recovery mode, the first port is connected to the fourth port, the second port is connected to the third port, the electric valve is configured to be in a closed state, and the heat recovery device and the air-cooled fin heat exchanger as well as the heat recovery device and the evaporator are configured to be in a conducting state.

7. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 1 or 2, characterized in that: The evaporative cooling and heating combined heat and cold four-pipe unit comprises a first expansion valve, the first expansion valve is connected to the pipeline between the heat recovery device and the evaporator, and the evaporative condenser is connected to the pipeline between the heat recovery device and the first expansion valve.

8. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 7, characterized in that: The evaporative cooling and heating combined supply four-pipe unit also includes a second expansion valve, one end of which is connected to the air-cooled fin heat exchanger, and the other end of which is connected to the pipeline between the heat recovery device and the first expansion valve.

9. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 1, characterized in that: The evaporative cooling and heating combined supply four-pipe unit also includes a first one-way component, which includes a first one-way valve and a second one-way valve. The first one-way valve connects the pipeline between the heat recovery device and the evaporator, and the second one-way valve connects the pipeline between the first one-way valve and the evaporator.

10. The evaporative cooling and heating combined heat and cold four-pipe unit according to claim 1 or 9, characterized in that: The evaporative cooling and heat combined supply four-pipe unit also includes a second one-way component, the second one-way component includes a third one-way valve and a fourth one-way valve, the third one-way valve is connected to the pipeline between the air-cooled fin heat exchanger and the second port, one end of the fourth one-way valve is connected to the evaporative condenser, and the other end of the fourth one-way valve is connected to the pipeline between the third one-way valve and the second port.

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