CN220852412U - Dehumidification heat recovery system - Google Patents

Abstract

The utility model relates to a dehumidification heat recovery system, which comprises a main pipe section, at least two condensers, a loop switching mechanism and a refrigerant transfer pipeline, wherein the main pipe section is connected with the condenser; the main pipe section comprises a compressor connected between the first refrigerant inlet and the first refrigerant outlet; the at least two condensers are connected in parallel between the first refrigerant inlet and the first refrigerant outlet, and form at least two working loops together with the main pipe section; the loop switching mechanism is used for respectively connecting the first refrigerant outlet with the second refrigerant inlets of the at least two condensers and selectively conducting the working loop of one condenser of the at least two condensers; the refrigerant transfer pipeline is used for communicating the loop switching mechanism with the low-pressure end of the compressor. The utility model can make the refrigerant in the condenser which is in pause operation flow back to the condenser loop which is in operation, and prevent the refrigerant in the condenser which is in pause operation from accumulating too much due to the phenomenon of gas cross.

Description

Dehumidification heat recovery system

Technical Field

The utility model relates to the field of dehumidification heat recovery, in particular to a dehumidification heat recovery system.

Background

Swimming pools are specialized places in which people can move or play games. Most swimming pools are built on the ground, a dehumidifying heat recovery heat pump integrating dehumidifying, refrigerating and water heating of the swimming pools is configured, most of energy conversion systems used in the dehumidifying heat recovery heat pumps of the swimming pools at present are closed and opened by means of direct-acting electromagnetic valves, through holes are formed in different positions of a valve body, each hole is led to different pipes, a valve is arranged in the middle of each cavity, two electromagnets are arranged on two sides, a magnet coil on which the valve body is electrified can be attracted to which side, different oil discharge holes are blocked or leaked through movement of the valve body, oil inlet holes are normally open, hydraulic oil can enter different oil discharge pipes, then the piston of the oil cylinder is pushed through oil pressure, the piston drives a piston rod, and the piston rod drives a mechanical device to move. Thus controlling the current through the electromagnet controls the mechanical movement. The device shares an evaporator for each independent compression circulation system, and three condensers are switched by electromagnetic valves, and correspond to the three functions. In operation of each function, the evaporator forms a compression cycle with only one of the condensers.

However, after each mode conversion (condenser conversion), the system refrigerant circulation amount is changed due to different volumes in different condensers, and a large amount of refrigerant needs to be stored and enough storage space is needed to meet the refrigerant requirements in different modes. In the system, only one condenser is operated in each mode, and the rest two condensers are idle and store a large amount of refrigerant, and the part of refrigerant is idle in the condenser and cannot be utilized.

In addition, as the three condensers are all connected in parallel at the high-pressure part of the system, the pressure of one condenser which runs is higher, and the other two condensers are lower, according to the gap characteristics of the four-way valve and the one-way valve, when the pressure difference is larger, the phenomenon that air is blown into the other two condensers is unavoidable, the larger the power parameter is, the larger the valve gap is, the larger the air blowing amount is, and the larger the gap caused by abrasion is when the valve is used for a longer time. When one mode is operated for a long time, the more refrigerant is in the other two idle condensers with lower pressure, the less refrigerant is circulated in the system, and finally the refrigerant is insufficient, so that the suction pressure is low, the oil return is difficult, and the operation efficiency is low.

Disclosure of utility model

Aiming at the problem of low refrigerant utilization rate in the traditional dehumidification heat recovery system, the utility model constructs an improved dehumidification heat recovery system.

The utility model adopts the following technical scheme:

a dehumidification heat recovery system is configured, comprising:

The main pipe section comprises a first refrigerant inlet, a first refrigerant outlet and a compressor connected between the first refrigerant inlet and the first refrigerant outlet;

The at least two condensers are connected in parallel between the first refrigerant inlet and the first refrigerant outlet, and form at least two working loops together with the main pipe section, and each condenser comprises a second refrigerant inlet;

The loop switching mechanism is used for respectively connecting the first refrigerant outlet with the second refrigerant inlets of the at least two condensers and selectively conducting the working loop of one condenser of the at least two condensers; and

And the refrigerant transfer pipeline is used for communicating the loop switching mechanism with the low-pressure end of the compressor so as to guide the refrigerant in the idle condenser in the at least two condensers into the conducted working loop.

In some embodiments, a valve is provided on the refrigerant transfer line that is operable to switch the refrigerant transfer line.

In some embodiments, the high pressure end and the low pressure end of the compressor are respectively provided with a pressure sensor, and the valve comprises a first electromagnetic valve for adjusting the opening and closing of the refrigerant transfer pipeline according to the pressure difference of the two pressure sensors.

In some embodiments, the circuit switching mechanism includes two four-way valves, which are in communication.

In some embodiments, the one end of the refrigerant transfer line is in communication with a line between the two four-way valves.

In some embodiments, the circuit switching mechanism comprises a first four-way valve comprising a first air inlet port, a first power-on port, a first power-off port, and a first air return port, and a second four-way valve comprising a second air inlet port, a second power-on port, a second power-off port, and a second air return port;

The first air inlet port is communicated with the first power-off port, and the first power-on port is communicated with the first air return port; or the first air inlet port is communicated with the first power-obtaining port, and the first power-losing port is communicated with the first air return port;

The second air inlet port is communicated with the second power-losing port, and the second power-obtaining port is communicated with the second air return port; or the second air inlet port is communicated with the second power-obtaining port, and the second power-losing port is communicated with the second air return port.

In some embodiments, the at least two condensers comprise three condensers, the three condensers comprising a first condenser, a second condenser, and a third condenser, the first inlet port is in communication with the downstream of the compressor, the first power loss port is in communication with the second inlet port, the first outlet port is in communication with the upstream of the third condenser, the first return port is in communication with the second return port, the second power loss port is in communication with the upstream of the first condenser, and the second outlet port is in communication with the upstream of the second condenser.

In some embodiments, the one end of the refrigerant transfer line is in communication with a line between the first return air port and the second return air port.

In some embodiments, check valves are provided at the outlets of the at least two condensers, respectively.

In some embodiments, the main pipe section further comprises a liquid reservoir and an evaporator, and an expansion valve, a second electromagnetic valve, a liquid viewing mirror and a filter are further arranged between the evaporator and the liquid reservoir.

The utility model has the following advantages:

According to the utility model, the refrigerant in the condenser which is in pause operation is returned to the condenser loop in operation by arranging the refrigerant transfer pipeline, so that the phenomenon that the refrigerant in the condenser which is in pause operation is insufficient due to excessive accumulation of the refrigerant due to the phenomenon of gas cross is prevented.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, the following description will be given with reference to the accompanying drawings and examples, it being understood that the following drawings only illustrate some examples of the present utility model and should not be construed as limiting the scope, and that other related drawings can be obtained from these drawings by those skilled in the art without the inventive effort. In the accompanying drawings:

FIG. 1 is a schematic diagram of a dehumidification heat recovery system in accordance with one embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the pool water heating circuit in the dehumidification heat recovery system of FIG. 1;

FIG. 3 is a schematic diagram of the air heating circuit in the dehumidification heat recovery system of FIG. 1;

fig. 4 is a schematic structural view of an outdoor heat dissipation circuit in the dehumidification heat recovery system of fig. 1;

FIG. 5 is a schematic view of a refrigerant transfer line in the dehumidification heat recovery system of FIG. 1;

FIG. 6 is a schematic view of a first four-way valve in the dehumidification heat recovery system of FIG. 1;

Fig. 7 is a schematic structural view of a second four-way valve in the dehumidification heat recovery system shown in fig. 1.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", etc. are configured and operated in specific directions based on the directions or positional relationships shown in part of the drawings, are merely for convenience of description of the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," and the like are used merely for convenience in describing the present technology and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," and the like may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

Fig. 1 to 6 show a dehumidification heat recovery system 1 according to an embodiment of the present utility model, as shown in fig. 1, the dehumidification heat recovery system 1 includes a main pipe section, at least two condensers, a circuit switching mechanism, and a refrigerant transfer line, wherein the main pipe section includes a first refrigerant inlet, a first refrigerant outlet, and a compressor 106 connected between the first refrigerant inlet and the first refrigerant outlet. At least two condensers are connected in parallel between the first refrigerant inlet and the first refrigerant outlet, and form at least two working loops together with the main pipe section, and each condenser comprises a second refrigerant inlet. The loop switching mechanism is used for connecting the first refrigerant outlet with the second refrigerant inlets of the at least two condensers respectively and selectively conducting the working loop where one of the at least two condensers is located. The refrigerant transfer pipeline is used for communicating the loop switching mechanism with the low-pressure end of the compressor and guiding the refrigerant in the idle condenser in the at least two condensers into the conducted working loop.

As shown in fig. 1, in some embodiments, the main pipe section includes a liquid reservoir 104, an evaporator 105, a compressor 106, a low pressure sensor 110, a high pressure sensor 111, an expansion valve 113, a second solenoid valve 114, a liquid viewing mirror 115, a filter 116, two hand valves 118, and piping that communicates them with each other.

Specifically, the low pressure sensor 110 is disposed at the inlet of the compressor 106, and the high pressure sensor 111 is disposed at the outlet of the compressor 106. The low pressure end of the compressor 106 is connected to one end of the evaporator 105, the other end of the evaporator 105 is connected to one end of the accumulator 104, and the other end of the accumulator 104 is connected to the condensing tube.

In some embodiments, a hand valve 118 is provided at the outlet of the reservoir 104 and an expansion valve 113 is provided at the inlet of the evaporator 105. A filter 116, a liquid mirror 115, a hand valve 118 and a second solenoid valve 114 are also provided between the expansion valve 113 and the hand valve 118 at the outlet of the reservoir 104.

In some embodiments, the circuit switching mechanism includes two four-way valves in communication, which communicate three condensers and the high pressure side of the compressor 106, such that separate formation of three circuits can be achieved by operating the switches of the two four-way valves. Specifically, the two four-way valves are a first four-way valve 107 and a second four-way valve 108, respectively.

Referring also to fig. 6, in some embodiments, the first four-way valve 107 includes a first intake port 1071, a first power port 1072, a first power loss port 1073, and a first return port 1074. The first air inlet port 1071 is selectively in communication with the first power port 1072 and the first power loss port 1073, and the first air return port 1074 is selectively in communication with the first power loss port 1073 and the first power gain port 1072.

Specifically, when the first four-way valve 107 is in the power-on state, the first air inlet port 1071 is in communication with the first power-on port 1072, and the first air return port 1074 is in communication with the first power-off port 1073. When the first four-way valve 107 is in a power-off state, the first air inlet port 1071 is in communication with the first power-off port 1073, and the first air return port 1074 is in communication with the first power-on port 1072.

Referring also to FIG. 7, in some embodiments, the second four-way valve 108 includes a second intake port 1081, a second power port 1082, a second power loss port 1083, and a second return port 1084. Wherein the second inlet port 1081 is selectively in communication with the second power port 1082 and the second power loss port 1083, and the second return port 1084 is selectively in communication with the second power port 1082 and the second power loss port 1083.

Specifically, when the second four-way valve 108 is in the powered state, the second intake port 1081 is in communication with the second powered port 1082, and the second return port 1084 is in communication with the second powered-off port 1083. When the second four-way valve 108 is in a power-down state, the second intake port 1081 is in communication with the second power-down port 1083, and the second return port 1084 is in communication with the second power-up port 1082.

Referring also to fig. 5, the first intake port 1071 communicates with the high pressure side of the compressor 106, the first power loss port 1073 communicates with the second intake port 1081, and the first return port 1074 communicates with the second return port 1084.

In some embodiments, one end of the refrigerant transfer line is in communication with the line between the first return port 1074 and the second return port 1084, and the other end of the refrigerant transfer line is in communication with the low pressure end of the compressor.

Specifically, the refrigerant transfer pipeline is also provided with a valve which is in operable communication with the refrigerant transfer pipeline. In some embodiments, the valve is a first solenoid valve 109, and the first solenoid valve 109 is electrically connected to the low pressure sensor 110 and the high pressure sensor 111, respectively, for receiving pressure signals of the low pressure sensor 110 and the high pressure sensor 111 and controlling the opening and closing of the refrigerant transfer line according to a pressure difference therebetween.

As shown in fig. 1, in some embodiments, the number of the condensers is three, and the three condensers are respectively a first condenser (101), a second condenser (102) and a third condenser (103), and all the three condensers can form a loop with the main pipe section through the loop switching mechanism alone, that is, the dehumidification heat recovery system 1 can form three loops altogether, and the three loops include a pool water heating loop, an air heating loop and an outdoor heat dissipation loop.

Referring also to fig. 2, in some embodiments, the pool water heating circuit includes a main pipe section, a first four-way valve 107, a second four-way valve 108, a first condenser 101, and a check valve 112, and pipe sections connecting them. The first condenser 101 is disposed between the liquid storage 104 and the second four-way valve 108 and is in communication with the second power-off port 1083, and the check valve 112 is disposed on a line where the first condenser 101 is in communication with the liquid storage 104.

Referring also to fig. 3, in some embodiments, the air heating circuit includes a main pipe section, a first four-way valve 107, a second four-way valve 108, a second condenser 102, and a check valve 112, and pipe sections connecting them. The second condenser 102 is disposed between the liquid reservoir 104 and the second four-way valve 108 and is in communication with the second power-receiving port 1082, and the check valve 112 is disposed on a line of the second condenser 102 that is in communication with the liquid reservoir 104.

Referring also to fig. 4, in some embodiments, the outdoor heat-dissipating circuit includes a main pipe section, a first four-way valve 107, a third condenser 103, a check valve 112, four hand valves 118, and pipe sections consisting of two needle valves 117 and a pipe line connecting them. The third condenser 103 is disposed between the liquid reservoir 104 and the first four-way valve 107, and is in communication with the first power port 1072. Two of the four hand valves 118 are respectively disposed at the inlet and outlet of the third condenser 103, the remaining one hand valve 118 and one needle valve 117 are disposed on the pipeline of the third condenser 103 communicating with the first four-way valve 107, and the remaining one hand valve 118, one needle valve 117 and check valve 112 are disposed on the pipeline of the third condenser 103 communicating with the liquid reservoir 104, so as to facilitate installation.

In the implementation process, when the system is in the pool water heating mode, the first four-way valve 107 and the second four-way valve 108 are both in a power-off state, and at this time, the pool water heating circuit is turned on, and the refrigerant flows in the pool water heating circuit. Because the pressures at the two sides of the inlet and outlet of the compressor 106 are different, under the action of the pressure difference, the refrigerant in the high-pressure end (i.e. the outlet side of the compressor 106) is not completely circulated to the first condenser 101 due to the characteristic of the four-way valve, and a small part of refrigerant can slowly flow into the second condenser 102 and the third condenser 103, so that the pressure difference at the two sides of the compressor 106 gradually increases.

When the pressure difference between the two sides of the compressor 106 reaches a certain difference, the first solenoid valve 109 is opened, and the refrigerant transfer pipeline circulates, so that the refrigerant in the second condenser 102 is in series with the refrigerant in the third condenser 103 through the first four-way valve 107, the second four-way valve 108 and the refrigerant transfer pipeline to the upstream of the compressor 106, and the refrigerant in the third condenser 103 is in series with the refrigerant in the refrigerant transfer pipeline to the upstream of the compressor 106. Finally, the refrigerant in the second condenser 102 and the third condenser 103 is returned to the pool water heating circuit.

Similarly, when the system is in the air heating mode, the first four-way valve 107 is in a power-off state, the second four-way valve 108 is in a power-on state, and at this time, the air heating circuit is turned on, and the refrigerant flows in the air heating circuit. Because the pressures at the two sides of the inlet and outlet of the compressor 106 are different, under the action of the pressure difference, the refrigerant in the high-pressure end (i.e. the outlet side of the compressor 106) is not fully circulated to the second condenser 102 due to the characteristic of the four-way valve, and a small part of refrigerant can slowly leak to the first condenser 101 and the third condenser 103, so that the pressure difference at the two sides of the compressor 106 gradually increases.

When the pressure difference between the two sides of the compressor 106 reaches a certain difference, the first solenoid valve 109 is opened, and the refrigerant transfer pipeline circulates, so that the refrigerant in the first condenser 101 is in series with the refrigerant to the upstream of the compressor 106 through the second four-way valve 108 and the refrigerant transfer pipeline, and the refrigerant in the third condenser 103 is in series with the refrigerant to the upstream of the compressor 106 through the first four-way valve 107 and the refrigerant transfer pipeline. Finally, the refrigerant flowing through the first condenser 101 and the third condenser 103 returns to the pool water heating circuit again.

Similarly, when the system is in the outdoor heat dissipation working mode, the first four-way valve 107 is in the power-on state, the second four-way valve 108 is in the power-off state, and at this time, the outdoor heat dissipation loop is turned on, and the refrigerant flows in the outdoor heat dissipation loop. Because the pressures at the two sides of the inlet and outlet of the compressor 106 are different, under the action of the pressure difference, the refrigerant in the high-pressure end (i.e. the outlet side of the compressor 106) is not completely circulated to the third condenser 103 due to the characteristic of the four-way valve, and a small part of refrigerant can slowly leak to the first condenser 101 and the second condenser 102, so that the pressure difference at the two sides of the compressor 106 gradually increases.

When the pressure difference between the two sides of the compressor 106 reaches a certain difference, the first solenoid valve 109 is opened, and the refrigerant transfer pipeline circulates, so that the refrigerant in the first condenser 101 is in series flow to the upstream of the compressor 106 through the first four-way valve 107, the second four-way valve 108 and the refrigerant transfer pipeline, and the refrigerant in the second condenser 102 is in series flow to the upstream of the compressor 106 through the second four-way valve 108 and the refrigerant transfer pipeline. Finally, the refrigerant in the first condenser 101 and the second condenser 102 is returned to the pool water heating circuit.

In summary, the utility model has at least the following beneficial effects:

1. Through setting up refrigerant transfer pipeline, the effectual characteristics that have utilized cross valve, check valve and compressor have solved the problem that refrigerant tainted air to other idle condensers under the long-time running state, will flow to the refrigerant in the idle condenser and retrieve to the operation pipeline again through refrigerant transfer pipeline to prevent that refrigerant from accumulating in idle condenser excessively, cause system cycle refrigerant inadequately.

2. The volume of the liquid storage device and the filling amount of the refrigerant can be reduced through the scheme, the production cost and the maintenance cost are reduced, the damage to the environment is reduced, the equipment can operate in any mode of long-time automatic continuous stable movement, and the problem that the circulating refrigerant is insufficient due to trace air leakage can not be caused for a long time.

3. Regardless of the mode and the change of the seasonal working condition, the algorithm that the first electromagnetic valve is added into parameters such as the evaporating temperature, the evaporating pressure, the condensing pressure, the ambient temperature and the like is controlled, and the refrigerant supplementing quantity is adjusted according to the calculated optimal working condition. The device can be operated under the working condition of economy and energy saving, and the operation effect is better.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A dehumidification heat recovery system, comprising:

The main pipe section comprises a first refrigerant inlet, a first refrigerant outlet and a compressor connected between the first refrigerant inlet and the first refrigerant outlet;

The at least two condensers are connected in parallel between the first refrigerant inlet and the first refrigerant outlet, and form at least two working loops together with the main pipe section, and each condenser comprises a second refrigerant inlet;

The circuit switching mechanism is used for respectively connecting the first refrigerant outlet with the second refrigerant inlets of the at least two condensers and selectively conducting the working circuit of one condenser of the at least two condensers; and

And the refrigerant transfer pipeline is used for communicating the loop switching mechanism with the low-pressure end of the compressor so as to guide the refrigerant in the idle condenser in the at least two condensers into the conducted working loop.

2. The dehumidification heat recovery system of claim 1, wherein a valve is provided on the refrigerant transfer line operable to open and close the refrigerant transfer line.

3. The dehumidification heat recovery system according to claim 2, wherein the high pressure end and the low pressure end of the compressor (106) are respectively provided with a pressure sensor, and the valve comprises a first solenoid valve (109) for adjusting the refrigerant transfer line switch according to a pressure difference of the two pressure sensors.

4. The dehumidification heat recovery system of claim 1, wherein the circuit switching mechanism comprises two four-way valves, the two four-way valves being in communication.

5. The dehumidification heat recovery system of claim 4, wherein the one end of the refrigerant transfer line is in communication with a line between the two four-way valves.

6. The dehumidification heat recovery system of claim 1, wherein the circuit switching mechanism comprises a first four-way valve (107) and a second four-way valve (108), the first four-way valve (107) comprising a first intake port (1071), a first power-off port (1072), a first power-off port (1073), and a first return port (1074), the second four-way valve (108) comprising a second intake port (1081), a second power-off port (1082), a second power-off port (1083), and a second return port (1084);

The first air inlet port (1071) is communicated with the first power-losing port (1073), and the first power-obtaining port (1072) is communicated with the first air return port (1074); or the first air inlet port (1071) is communicated with the first power-obtaining port (1072), and the first power-losing port (1073) is communicated with the first air return port (1074);

The second air inlet port (1081) is in communication with the second power loss port (1083), and the second power gain port (1082) is in communication with the second air return port (1084); or the second air inlet port (1081) is communicated with the second power obtaining port (1082), and the second power losing port (1083) is communicated with the second air returning port (1084).

7. The dehumidification heat recovery system of claim 6, wherein the at least two condensers comprise three condensers, the three condensers comprising a first condenser (101), a second condenser (102), and a third condenser (103), the first intake port (1071) being in communication downstream of the compressor (106), the first power loss port (1073) being in communication with the second intake port (1081), the first power gain port (1072) being in communication upstream of the third condenser (103), the first return port (1074) being in communication with the second return port (1084), the second power loss port (1083) being in communication upstream of the first condenser (101), the second power gain port (1082) being in communication upstream of the second condenser (102).

8. The dehumidification heat recovery system of claim 7, wherein the one end of the refrigerant transfer line is in communication with a line between the first return port (1074) and the second return port (1084).

9. The dehumidification heat recovery system according to claim 1, wherein the outlets of the at least two condensers are provided with check valves (112), respectively.

10. The dehumidification heat recovery system according to claim 1, wherein the main pipe section further comprises a liquid reservoir (104) and an evaporator (105), and an expansion valve (113), a second electromagnetic valve (114), a liquid viewing mirror (115) and a filter (116) are further arranged between the evaporator (105) and the liquid reservoir (104).